CN113559350A

CN113559350A - Control circuit of hydration treatment liquid inlet and outlet balance system

Info

Publication number: CN113559350A
Application number: CN202110881390.8A
Authority: CN
Inventors: 冯羽亮; 冯新庆
Original assignee: Beijing Heartcare Medical Technology Co ltd
Current assignee: Beijing Heartcare Medical Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-10-29

Abstract

The invention discloses a hydration treatment liquid inlet and outlet balance system control circuit which comprises a main controller, a blockage and air detection unit, a single-board computer expansion unit, a battery charging and protecting unit, a motor driving unit, a weighing unit and a power supply unit, wherein the blockage and air detection unit, the single-board computer expansion unit, the motor driving unit, the weighing unit and the power supply unit are all connected with the main controller, and the battery charging and protecting unit is connected with the power supply unit. According to the invention, the weighing unit is arranged, so that the weight of the infusion bag and the weight of the urine bag can be weighed in real time respectively, the urine flow speed is calculated through the main controller, the infusion speed is automatically regulated in a feedback manner, the motor driving unit drives the motor, so that the liquid in the infusion tube flows directionally at a certain speed, the balance of the liquid inlet and outlet amount is realized, the liquid balance in a human body is ensured, the urine volume is improved, and the blood volume is ensured to be sufficient.

Description

Control circuit of hydration treatment liquid inlet and outlet balance system

Technical Field

The invention relates to the technical field of hydration treatment. In particular to a control circuit of a hydration treatment liquid inlet and outlet balance system.

Background

With the use of iodine-containing contrast agents, which are increasingly concerned about their safety, contrast-induced acute kidney injury is one of the common complications of coronary artery diagnosis and interventional therapy, with severe adverse outcome; hydration treatment can effectively reduce the occurrence risk of contrast-induced nephropathy; this diuretic effect can be achieved by forced diuresis with large doses of diuretics which theoretically protect the kidneys from contrast agent toxicity by reducing renal medullary hypoxia, but this approach has proven to be detrimental in practice, affecting fluid balance in the body, and failing to achieve an increase in urine volume while ensuring adequate blood volume.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to provide a control circuit of a hydration treatment inlet and outlet liquid balance system, which has high safety and can improve the urine volume and control the venous transfusion for preventing the blood volume deficiency.

In order to solve the technical problems, the invention provides the following technical scheme: a hydration treatment liquid inlet and outlet balance system control circuit comprises a main controller, a blockage and air detection unit, a single board computer expansion unit, a battery charging and protecting unit, a motor driving unit, a weighing unit and a power supply unit, wherein the blockage and air detection unit, the single board computer expansion unit, the motor driving unit, the weighing unit and the power supply unit are all connected with the main controller, and the battery charging and protecting unit is connected with the power supply unit.

The technical scheme of the invention achieves the following beneficial technical effects:

1. by arranging the weighing unit, the invention can respectively weigh the weight of the infusion bag and the weight of the urine bag in real time, calculate the urine flow speed through the main controller, automatically adjust the infusion speed according to the feedback, drive the motor by the motor driving unit, realize the directional flow of the liquid in the infusion tube at a certain speed, realize the balance of the liquid inlet and outlet amount, ensure the balance of the liquid in the human body, improve the urine volume and simultaneously ensure the sufficient blood volume.

2. By arranging the blockage and air detection unit, when a pipeline is blocked, the intelligent medical instrument can send a signal to the main controller in time, so that an alarm is sent out, protection is triggered, and the treatment safety is ensured; the blockage detection module supplies power through an independent high-precision power supply circuit, so that the blockage detection module can run more stably; get into the air in the vein transfer line, the air can cause human untoward reaction in case get into the human body, can endanger life when serious, through setting up the air detection module, whether have the bubble in the detection vein transfer line that can be timely, avoids inputing the condition emergence that the patient is internal with the air, improves treatment safety.

3. According to the invention, by arranging the battery charging and protecting unit, the battery can be temporarily used as a standby power supply when the mains supply is disconnected, so that the situation that the equipment cannot be used after the power supply is disconnected is avoided; through setting up the battery charging module, can charge and measure charging current for the battery, discharge current, battery voltage and battery power, wherein measured data is read by power module, when charging current and discharge current overflow, battery protection module can carry out overcurrent protection to it, when battery high temperature and short circuit, battery protection module also can take place the effect, protect the battery, and when the battery overcharges and overdischarging, battery protection module also can protect the battery, the security of device when charging has been guaranteed.

4. According to the invention, the dormancy time of the battery can be set through the battery dormancy module, so that the dormancy of the battery is more reasonable, the electric quantity of the battery is saved, the service life of the battery is prolonged, the user notices the user after abnormal treatment through the setting of the indicator light module, and the user can timely process the abnormal treatment.

Drawings

FIG. 1 is a schematic circuit diagram of a micro control module of the occlusion and air detection unit of the present invention;

FIG. 2 is a schematic circuit diagram of a power module of the occlusion and air detection unit of the present invention;

FIG. 3 is a schematic circuit diagram of a CAN bus data transceiver module of the jam and air detection unit of the present invention;

FIG. 4 is a schematic circuit diagram of the blood leakage detection module of the occlusion and air detection unit of the present invention;

FIG. 5 is a schematic circuit diagram of the blood leak detector connection interface module of the occlusion and air detection unit of the present invention;

FIG. 6 is a schematic circuit diagram of the heating module of the occlusion and air detection unit of the present invention;

FIG. 7 is a schematic circuit diagram of the venous clamp module of the occlusion and air detection unit of the present invention;

FIG. 8 is a schematic diagram of a first detection circuit and a second detection circuit in the air detection module of the occlusion and air detection unit of the present invention;

FIG. 9 is a schematic diagram of a third detection circuit and a fourth detection circuit in the air detection module of the occlusion and air detection unit of the present invention;

FIG. 10 is a schematic diagram of the power supply circuit of the occlusion detection module of the occlusion and air detection unit of the present invention;

FIG. 11 is a schematic circuit diagram of a jam detection module of the present invention jam and air detection unit;

FIG. 12 is a schematic circuit diagram of the power monitoring module of the occlusion and air detection unit of the present invention;

FIG. 13 is a schematic circuit diagram of a main power supply module of the single board computer expansion unit of the present invention;

FIG. 14 is a schematic circuit diagram of a 3.3V power supply module of a single board computer expansion unit according to the present invention

FIG. 15 is a schematic circuit diagram of a 12V power supply module of the expansion unit of the single board computer according to the present invention;

FIG. 16 is a schematic circuit diagram of a micro control module of the expansion unit of the single board computer according to the present invention;

FIG. 17 is a schematic circuit diagram of a real-time clock module of a single board computer expansion unit according to the present invention;

FIG. 18 is a schematic circuit diagram of a CAN data transceiver module of a single board computer expansion unit according to the present invention;

FIG. 19 is a schematic circuit diagram of a resistive touch screen interface module of the single board computer expansion unit of the present invention;

FIG. 20 is a schematic circuit diagram of the key and alarm interface module of the single board computer expansion unit of the present invention;

FIG. 21 is a schematic circuit diagram of a display screen driver module of a single board computer expansion unit according to the present invention;

FIG. 22 is a schematic circuit diagram of a backlight adjustment interface module of a single board computer expansion unit according to the present invention;

FIG. 23 is a schematic circuit diagram of an interface module of a single board computer expansion unit according to the present invention;

FIG. 24 is a schematic circuit diagram of an indicator light module of the single board computer expansion unit of the present invention;

FIG. 25 is a schematic circuit diagram of a battery charging module of the battery charging and protection unit of the present invention;

FIG. 26 is a schematic circuit diagram of a battery protection module of the battery charging and protection unit of the present invention;

FIG. 27 is a schematic circuit diagram of a control module of the motor drive unit of the present invention;

FIG. 28 is a circuit schematic of an interface module of the motor drive unit of the present invention;

FIG. 29 is a schematic circuit diagram of a CAN interface module of the motor drive unit of the present invention;

FIG. 30 is a schematic circuit diagram of a switching module of the motor drive unit of the present invention;

FIG. 31 is a schematic circuit diagram of a drive module of the motor drive unit of the present invention;

FIG. 32 is a schematic circuit diagram of a detection module of the motor drive unit of the present invention;

FIG. 33 is a schematic circuit diagram of load cell B1 of the load cell of the present invention;

FIG. 34 is a schematic diagram of the circuit of load cell B2 in the load module of the load cell of the present invention;

FIG. 35 is a schematic circuit diagram of load cell B3 of the load cell of the present invention;

FIG. 36 is a schematic circuit diagram of the analog-to-digital conversion U8 chip in the digital-to-analog module of the weighing cell of the present invention;

FIG. 37 is a schematic circuit diagram of the buck regulator U1 chip and the P2 interface of the power conversion module of the weighing cell of the present invention;

FIG. 38 is a schematic circuit diagram of the voltage regulator U4 chip and the voltage regulator Q1 chip of the power conversion module of the weighing cell of the present invention;

FIG. 39 is a schematic circuit diagram of the CAN transceiver U2 chip of the weighing interface circuit of the weighing cell of the present invention;

FIG. 40 is a schematic circuit diagram of the weighing microcontroller U7 chip in the weight control module of the weighing cell of the present invention;

FIG. 41 is a schematic circuit diagram of the battery charging P1 interface and the battery P4 interface of the power supply unit of the present invention;

FIG. 42 is a schematic circuit diagram of the power switching U1 chip, the voltage conversion U2 chip and the optocoupler U8 of the power supply unit of the invention;

FIG. 43 is a schematic circuit diagram of the voltage conversion U9 chip and the voltage regulation VR2 chip of the power supply unit of the present invention;

FIG. 44 is a schematic circuit diagram of the output control U6 chip of the power supply unit of the present invention;

FIG. 45 is a schematic circuit diagram of the pin connector P5 and the low pass filter LP1 of the power supply unit of the present invention;

FIG. 46 is a schematic circuit diagram of the microcontroller U7 chip of the power supply unit of the present invention;

FIG. 47 is a schematic circuit diagram of the CAN transceiver U5 chip of the power supply unit of the present invention;

FIG. 48 is a schematic circuit diagram of the monitor U3 chip of the power supply unit of the present invention;

FIG. 49 is a schematic circuit diagram of the speed sensor P3 interface of the power supply unit of the present invention;

FIG. 50 is a schematic circuit diagram of the P2 interface of the power supply unit of the present invention;

FIG. 51 is a schematic circuit diagram of the current sense U4 chip of the power supply unit of the present invention;

fig. 52 is a schematic circuit diagram of the fet group Q10 of the power supply unit of the present invention.

Detailed Description

A hydration treatment inlet and outlet liquid balance system control circuit comprises a main controller, a blockage and air detection unit, a single board computer expansion unit, a battery charging and protecting unit, a motor driving unit, a weighing unit and a power supply unit, wherein the blockage and air detection unit, the single board computer expansion unit, the motor driving unit, the weighing unit and the power supply unit are all connected with the main controller, and the battery charging and protecting unit is connected with the power supply unit.

The model of the main controller is element14 BeagleBone Black; as shown in fig. 1-12, the occlusion and air detection unit includes a micro control module, a blood leakage detection module, an air detection module, an occlusion detection module and a power module, wherein an output end of the power module is connected with an input end of the micro control module, and the blood leakage detection module, the air detection module and the occlusion detection module are respectively connected with the micro control module; as shown in fig. 1, the micro control module includes a microcontroller U4, the model of the microcontroller U4 is LPC1549JBD48, a pin 5 of the microcontroller U4 is connected with a resistor R5, and the other end of the resistor R5 inputs DP3V 3; the microcontroller U4 is connected with a 4-pin connector P2, pin 1 of a 4-pin connector P2 is grounded, pin 2 of a 4-pin connector P2 is connected with pin 23 of the microcontroller U4, pin 3 of a 4-pin connector P2 is connected with pin 22 of the microcontroller U4, and pin 4 of a 4-pin connector P2 is input with DP3V 3; a pin 24 of the microcontroller U4 is connected with a resistor R6, a pin 37 of the microcontroller U4 is connected with a resistor R2, a pin 38 of the microcontroller U4 is connected with a resistor R5, and output ends of the resistor R6, the resistor R2 and the resistor R5 are connected with each other and input into DP3V 3; a pin 25 of the microcontroller U4 is connected with a capacitor C13, a pin 26 of the microcontroller U4 is connected with a capacitor C21, a tripod crystal oscillator Y1 is connected between the pin 25 and the pin 26 of the microcontroller U4, a pin 1 of the tripod crystal oscillator Y1 is connected with a pin 26 of the microcontroller U4, a pin 3 of the tripod crystal oscillator Y1 is connected with a pin 25 of the microcontroller U4, and a pin 2 of the tripod crystal oscillator Y1 is connected with an output end of the capacitor C13 and an output end of the capacitor C21 and is grounded; the microcontroller U4 is connected with a 4-pin connector P33, a pin 1 input DP3V3 of a 4-pin connector P33, a pin 2 of the 4-pin connector P33 is connected with a pin 33 of the microcontroller U4, a pin 3 of a 4-pin connector P33 is connected with a pin 29 of the microcontroller U4, and a pin 4 of the 4-pin connector P33 is grounded; pin 17 and pin 11 of microcontroller U4 are connected to each other and grounded, and pin 20, pin 40 and pin 41 of microcontroller U4 are connected to each other and grounded; pin 30 of microcontroller U4 inputs DP3V3, pin 16, pin 14 and pin 10 of microcontroller U4 are connected to each other and input into NTC3V 3; pin 27, pin 14 and pin 39 of microcontroller U4 are interconnected and input DP3V 3; a pin 28 of the microcontroller U4 is connected with a green light emitting diode D3, the cathode of the green light emitting diode D3 is connected with the pin 28 of the microcontroller U4, the anode of the green light emitting diode D3 is connected with a resistor R1, and the other end of the resistor is input with DP3V 3; as shown in fig. 12, a pin 34 of the microcontroller U4 is connected with a power supply monitoring module, the power supply monitoring module includes a power supply management chip U5, a model of the power supply management chip U5 is CAT809STBI-GT3, a pin 2 of the power supply management chip U5 is connected with the pin 34 of the microcontroller U4, a pin 2 of the power supply management chip U5 is connected with a resistor R9, the other end of the resistor R9 is connected with a pin 1 of the power supply management chip U5 and grounded, and a pin 3 of the power supply management chip U5 is input with DP3V 3; the power supply input end of the microcontroller U4 is electrically connected with the output end of the power supply module; the microcontroller U4 is connected to a blood leakage detector connection interface module, as shown in fig. 5, the blood leakage detector connection interface module includes a 4-pin connector LEAK, a ferrite bead FB9, a resistor R24, a resistor R23, a resistor R22, and a resistor R21, and pin 1 of the 4-pin connector LEAK is grounded; pin 2 of the 4-pin connector LEAK is connected with a first end of a resistor R24, and a second end of a resistor R24 is connected with pin 3 of a microcontroller U4; pin 3 of the 4-pin connector LEAK is connected with a first end of a resistor R23, and a second end of a resistor R23 is connected with pin 4 of a microcontroller U4; a pin 4 of the 4-pin connector LEAK is connected with a first end of a ferrite bead FB9, a second end of the ferrite bead FB9 is input with VCC5V, a first end of the ferrite bead FB9 is connected with a capacitor C7, and a second end of the capacitor C7 is grounded; a first end of the resistor R21 is connected with pin 3 of the 4-pin connector LEAK, a first end of the resistor R22 is connected with pin 2 of the 4-pin connector LEAK, a second end of the resistor R21 is connected with a second end of the resistor R22 and input into DP3V 3; a first end of the resistor R21 is connected with a capacitor C42, a first end of the resistor R22 is connected with a capacitor C43, and a second end of the capacitor C42 and a second end of the capacitor C43 are connected with each other and grounded; the microcontroller U4 is connected with a heating module, as shown in fig. 6, the heating module includes a 4-pin connector HEATER, a resistor R26, a resistor R27, an ferrite bead FB5, and pin 1 of the 4-pin connector HEATER is grounded; pin 2 of the 4-pin connector heat is connected with a first end of a resistor R27, and a second end of a resistor R27 is connected with a pin 45 of a microcontroller U4; pin 3 of the 4-pin connector heat is connected with a first end of a resistor R26, and a second end of a resistor R26 is connected with a pin 46 of a microcontroller U4; a pin 4 of the 4-pin connector heat is connected with a first end of an ferrite bead FB5, a second end of the ferrite bead FB5 is input with DP3V3, a first end of the ferrite bead FB5 is connected with a capacitor C27, and a second end of the capacitor C27 is grounded; a first end of the resistor R26 is connected with a capacitor C30, a first end of the resistor R27 is connected with a capacitor C28, and second ends of the capacitor C30 and the capacitor C28 are connected with each other and grounded; the microcontroller U4 is connected to a vein clip module, which, as shown in fig. 7, includes a 4-pin connector CLAMP1, a 4-pin connector CLAMP2, and a 4-pin connector CLAMP 3; pin 2 of the 4-pin connector CLAMP1 is connected with a resistor R4, and the second end of the resistor R4 is connected with pin 15 of the microcontroller U4; a resistor R3 is connected to pin 3 of the 4-pin connector CLAMP1, and the second end of the resistor R3 is connected with pin 24 of the microcontroller U4; pin 3 of the 4-pin connector CLAMP1 is connected with a capacitor C20, pin 2 of the 4-pin connector CLAMP1 is connected with a capacitor C23, and second ends of the capacitor C20 and the capacitor C23 are connected with each other, connected with pin 1 of the 4-pin connector CLAMP1 and then grounded; pin 2 of the 4-pin connector CLAMP2 is connected with a resistor R28, and the second end of the resistor R28 is connected with pin 12 of the microcontroller U4; pin 3 of the 4-pin connector CLAMP2 is connected with a resistor R25, and the second end of the resistor R25 is connected with pin 13 of the microcontroller U4; pin 3 of the 4-pin connector CLAMP2 is connected with a capacitor C26, pin 2 of the 4-pin connector CLAMP2 is connected with a capacitor C29, and second ends of the capacitor C26 and the capacitor C29 are connected with each other, connected with pin 1 of the 4-pin connector CLAMP2 and then grounded; pin 2 of the 4-pin connector CLAMP3 is connected with a resistor R30, and the second end of the resistor R30 is connected with pin 8 of the microcontroller U4; a resistor R29 is connected to a pin 3 of the 4-pin connector CLAMP3, and a second end of the resistor R29 is connected with a pin 9 of a microcontroller U4; pin 3 of the 4-pin connector CLAMP3 is connected with a capacitor C32, pin 2 of the 4-pin connector CLAMP3 is connected with a capacitor C35, and second ends of the capacitor C32 and the capacitor C35 are connected with each other, connected with pin 1 of the 4-pin connector CLAMP3 and then grounded; as shown in fig. 2, the power supply module includes a switching regulator chip U1, a forward low dropout regulator U3, and a forward low dropout regulator U13, the model of the switching regulator chip U1 is LMR14206, the model of the forward low dropout regulator U3 is AMS1117-5.0, and the model of the forward low dropout regulator U13 is AMS 1117-3.3; a pin 5 of the switch voltage stabilization chip U1 is connected with a pin 4 of the switch voltage stabilization chip U1, the pin 5 of the switch voltage stabilization chip U1 is connected with a capacitor C14 and is connected with 24V direct current, and the other end of the capacitor C14 is connected with a pin 2 of the switch voltage stabilization chip U1 and is grounded; pin 1 of the switch voltage-stabilizing chip U1 is connected with a capacitor C9, pin 6 of the switch voltage-stabilizing chip U1 is connected with the output end of the capacitor C9, the output end of the capacitor C9 is connected with a diode D4, the cathode of the diode D4 is connected with the output end of the capacitor C9, the anode of the diode D4 is grounded, the anode of the diode D4 is connected with an inductor L3, the second end of the inductor L3 is connected with a resistor R8, the output end of the resistor R8 is connected with pin 3 of the switch voltage-stabilizing chip U1, pin 3 of the switch voltage-stabilizing chip U1 is connected with a resistor R11, the other end of the resistor R11 is grounded, the second end of the inductor L3 outputs VCC7V, the second end of the inductor L3 is connected with a pole capacitor C15, the anode of the pole capacitor C15 is connected with the second end of the inductor L3, and the cathode of the pole capacitor C15 is grounded; the anode of the polar capacitor C15 is connected with the Vin pin of the forward low dropout regulator U3, the GND pin of the forward low dropout regulator U3 is grounded, two Out pins of the forward low dropout regulator U3 are connected with each other to output VCC5V and connected with a capacitor C16, and the second end of the capacitor C16 is grounded; an Out pin of the forward low dropout regulator U3 is connected with a Vin pin of the forward low dropout regulator U13, a GND pin of the forward low dropout regulator U13 is grounded, two Out pins of the forward low dropout regulator U13 are connected with each other to output DP3V3 and are connected with a capacitor C17, and a second end of the capacitor C17 is grounded; the DP3V3 output end of the forward low dropout regulator U13 is connected with the DP3V3 input end of the microcontroller U4, and the output end of the forward low dropout regulator U3 is connected with the input end of the CAN bus data transceiver module; as shown in fig. 3, the CAN bus data transceiver module includes a transceiver U2 and an ESD protection diode D1, the model of the transceiver U2 is TJA 1051T/3; pin 7 of the transceiver U2 is connected with a high-order data line of the CAN bus, pin 6 of the transceiver U2 is connected with a bottom-order data line of the CAN bus, the high-order data line is connected with pin 1 of the ESD electrostatic protection diode D1, the low-order data line is connected with pin 2 of the ESD electrostatic protection diode D1, and pin 3 of the ESD electrostatic protection diode D1 is grounded; pin 2 of the transceiver U2 is grounded, pin 1 of the transceiver U2 is connected with pin 19 of the microcontroller U4, pin 4 of the transceiver U2 is connected with pin 21 of the microcontroller U4, pin 8 of the transceiver U2 is connected with pin 18 of the microcontroller U4, and pin 8 of the transceiver U2 is connected with a resistor R7 in series and grounded; a pin 3 of the transceiver U2 is connected with a capacitor C10, the second end of the capacitor C10 is grounded, the first end of the capacitor C10 is input with VCC5V, and two ends of the capacitor C10 are connected with a capacitor C11 in parallel; a pin 5 of the transceiver U2 is connected with a capacitor C12 and simulates input or output DP3V3, and the other end of the capacitor C12 is grounded; as shown in fig. 4, the blood leakage detection module includes a field effect transistor Q1, a field effect transistor Q2, a ferrite bead FB6, a ferrite bead FB7, a ferrite bead FB10, and a 6-pin connector P1, wherein the models of the field effect transistor Q1 and the field effect transistor Q2 are FDC 6420C; pin 1 of the field-effect transistor Q1 is connected with pin 43 of the microcontroller U4 and is connected with a resistor R39, the other end of the resistor R39 is grounded, pin 2 of the field-effect transistor Q1 is connected with a resistor R40 and is input with VCC5V, the second end of the resistor R40 is connected with pin 3 of the field-effect transistor Q1, the second end of the resistor R40 is connected with pin 6 of the field-effect transistor Q1, pin 5 of the field-effect transistor Q1 is grounded, pin 4 of the field-effect transistor Q1 is connected with the first end of the ferrite bead FB6, the second end of the ferrite bead FB6 is connected with a capacitor C33 and is connected with pin 4 of the 6-pin connector P1, and the second end of the capacitor C33 is grounded; pin 1 of a field effect transistor Q2 is connected with pin 44 of a microcontroller U4 and is connected with a resistor R41, the other end of the resistor R41 is grounded, pin 2 of the field effect transistor Q2 is connected with a resistor R42 and is input with VCC5V, the second end of the resistor R42 is connected with pin 3 of the field effect transistor Q2, the second end of the resistor R42 is connected with pin 6 of the field effect transistor Q2, pin 5 of the field effect transistor Q2 is grounded, pin 4 of the field effect transistor Q2 is connected with the first end of a ferrite bead FB7, the second end of the ferrite bead FB7 is connected with a capacitor C34 and is connected with pin 5 of a 6-pin connector P1, and the second end of the capacitor C34 is grounded; pin 1 of the 6-pin connector P1 is grounded, pin 2 of the 6-pin connector P1 is connected with a resistor R20, the second end of the resistor R20 is connected with a pin 37 of a microcontroller U4, pin 3 of the 6-pin connector P1 is connected with a resistor R19, the second end of the resistor R19 is connected with a pin 38 of the microcontroller U4, pin 6 of the 6-pin connector P1 is connected with the first end of a ferrite bead FB10, the second end of the ferrite bead FB10 is input with DP3V3, the first end of the ferrite bead FB10 is connected with a capacitor C22, and the second end of the capacitor C22 is grounded; as shown in fig. 8 and 9, the air detection module includes a first detection circuit, a second detection circuit, a third detection circuit and a fourth detection circuit, and the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are respectively connected with the microcontroller U4; the first detection circuit comprises a 3-pin connector AIR1, a ferrite bead FB1, a resistor R33, a capacitor C38 and a capacitor C39, wherein a pin 2 of the 3-pin connector AIR1 is connected with a first end of the resistor R33, a second end of the resistor R33 is connected with a pin 2 of the microcontroller U4, a second end of the resistor R33 is connected with the capacitor C24, and a second end of the capacitor C24 is grounded; pin 3 of the 3-pin connector AIR1 is connected with a first end of a ferrite bead FB1 and is input with VCC5W, and a second end of the ferrite bead FB1 is input with VCC 5V; pin 3 of the 3-pin connector AIR1 is connected with a first end of a capacitor C38, pin 2 of the 3-pin connector AIR1 is connected with a first end of a capacitor C39, a second end of the capacitor C38 is connected with a second end of a capacitor C39, and is connected with pin 1 of the 3-pin connector AIR1 and then grounded; the second detection circuit comprises a 3-pin connector AIR2, a ferrite bead FB2, a resistor R34, a capacitor C40 and a capacitor C41, wherein a pin 2 of the 3-pin connector AIR2 is connected with a first end of the resistor R34, a second end of the resistor R34 is connected with a pin 1 of the microcontroller U4, a second end of the resistor R34 is connected with the capacitor C25, and a second end of the capacitor C25 is grounded; pin 3 of the 3-pin connector AIR2 is connected with a first end of a ferrite bead FB2, and a second end of the ferrite bead FB2 is input with VCC 5V; the third detection circuit comprises a 3-pin connector AIR3, a ferrite bead FB3, a resistor R35, a capacitor C48 and a capacitor C49, wherein the pin 2 of the 3-pin connector AIR2 is connected with the first end of the capacitor C40, the pin 2 of the 3-pin connector AIR2 is connected with the first end of the capacitor C41, the second end of the capacitor C40 is connected with the second end of the capacitor C41 and is connected with the pin 1 of the 3-pin connector AIR2 and then grounded, the pin 2 of the 3-pin connector AIR2 is connected with the first end of a resistor R35, the second end of the resistor R35 is connected with the pin 48 of the microcontroller U4, the second end of the resistor R35 is connected with the capacitor C31, and the second end of the capacitor C31 is grounded; pin 3 of the 3-pin connector AIR2 is connected with a first end of a ferrite bead FB3, and a second end of the ferrite bead FB2 is input with VCC 5V; a fourth detection circuit comprises a 3-pin connector AIR4, a ferrite bead FB4, a resistor R36, a capacitor C45 and a capacitor C44, wherein the pin 3 of the 3-pin connector AIR2 is connected with a first end of a capacitor C48, the pin 2 of the 3-pin connector AIR2 is connected with a first end of a capacitor C49, a second end of the capacitor C48 is connected with a second end of a capacitor C49 and is connected with a pin 1 of the 3-pin connector AIR3 and then grounded, the pin 2 of the 3-pin connector AIR4 is connected with a first end of a resistor R36, a second end of a resistor R36 is connected with a pin 47 of a microcontroller U4, a second end of the resistor R36 is connected with a capacitor C36, and a second end of the capacitor C36 is grounded; pin 3 of the 3-pin connector AIR4 is connected with a first end of a ferrite bead FB4, and a second end of the ferrite bead FB4 is input with VCC 5V; pin 3 of the 3-pin connector AIR4 is connected with a first end of a capacitor C45, pin 2 of the 3-pin connector AIR4 is connected with a first end of a capacitor C44, a second end of the capacitor C45 is connected with a second end of a capacitor C44, and is connected with pin 1 of the 3-pin connector AIR4 and then grounded; as shown in fig. 11, the blocking detection module includes a 3-pin connector NTC, a resistor R31, a resistor R32, a resistor R14, and a resistor R15, a pin 2 of the 3-pin connector NTC is connected to a first end of the resistor R32, and a second end of the resistor R32 is connected to a pin 6 of a microcontroller U4; pin 3 of the 3-pin connector NTC is connected with a first end of a resistor R31, and a second end of a resistor R31 is connected with pin 7 of a microcontroller U4; a second end of the resistor R31 is connected with a capacitor C36, a second end of the resistor R32 is connected with a capacitor C37, and a second end of the capacitor C36 and a second end of the capacitor C37 are connected with each other, connected with a pin 1 of the 3-pin connector NTC and then grounded; a first end of the resistor R31 is connected with a first end of the resistor R14, a first end of the resistor R32 is connected with a first end of the resistor R15, a second end of the resistor R15 and a second end of the resistor R14 are connected with each other and connected with a capacitor C18, a second end with the capacitor C18 is grounded, and a second end of the resistor R14 is input with NTC3V 3; as shown in fig. 10, the blocking detection module further includes a power supply circuit, where the power supply circuit includes a precision voltage regulator U6, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C8, and a ferrite bead FB8, the precision voltage regulator U6 is NCP51460SN33T1G, a Vin pin of the precision voltage regulator U6 is connected to a first end of the capacitor C8, a second end of the capacitor C8 is grounded, and a first end of the capacitor C8 is input to VCC 5V; the Out pin of the precision voltage regulator U6 is connected with the first end of a capacitor C1 and the first end of a capacitor C2, the first end of the capacitor C2 outputs NTC3V3, and the second end of the capacitor C1 and the second end of the capacitor C2 are connected with the GND pin of the precision voltage regulator U6 and grounded; a second end of the capacitor C2 is connected with a first end of a ferrite bead FB8, a second end of the ferrite bead FB8 is respectively connected with first ends of a capacitor C3, a capacitor C4, a capacitor C5 and a capacitor C6 and grounded, second ends of a capacitor C3, a capacitor C4, a capacitor C5 and a capacitor C6 are connected with one another and output DP3V3, and a DP3V3 end output by the power supply circuit is connected with an input DP3V3 end in the blocking detection mode; the data transceiving end of the transceiver U2 is connected with the CAN interface of the main controller through a CAN bus.

As shown in fig. 13-24, the single board computer expansion unit includes a main power supply module, a 3.3V power supply module, a 12V power supply module, a micro control module, a real-time clock module, an interface module, a resistive touch screen interface module, and a display screen driving module, wherein an input end of the 3.3V power supply module and an input end of the 12V power supply module are respectively electrically connected to an output end of the main power supply module, an output end of the 3.3V power supply module is electrically connected to an input end of the micro control module, an output end of the 12V power supply module is electrically connected to an input end of the display screen driving module, and the real-time clock module, the interface module, the resistive touch screen interface module, and the display screen driving module are all connected to the micro control module; as shown in fig. 13, the main power supply module includes a step-down voltage regulator U1, a fixed voltage regulator U2, a USB connector J1, a resistor R36, a capacitor C311, a capacitor C322, a capacitor C33, a capacitor C34, a capacitor C35, a pole capacitor C31, an inductor L31, a diode D33, and a single-pole single-throw switch S2, where the model of the step-down voltage regulator U1 is TPS54560DDA, the model of the fixed voltage regulator U2 is AMS1084CM-5.0, a pin 2 of the step-down voltage regulator U1 is connected to a first end of the capacitor C34 and a first end of the capacitor C35, a first end of the capacitor C34 inputs 24V dc, and a second end of the capacitor C34 and a second end of the capacitor C35 are connected to each other and grounded; pin 4 of the step-down voltage stabilizer U1 is connected with a resistor R35, and the other end of the resistor R35 is grounded; the first end of the resistor R36 is connected with a pin 6 of the step-down voltage regulator U1, the second end of the resistor R36 is connected with the first end of the capacitor C311, the second end of the capacitor C311 is grounded, the first end of the resistor R36 is connected with the capacitor C310, and the other end of the capacitor C310 is connected with the second end of the capacitor C311; pin 1 of the step-down voltage regulator U1 is connected with a first end of a capacitor C33, and a second end of a capacitor C33 is connected with a first end of an inductor L31; pin 8 of the step-down voltage regulator U1 is connected with the second end of the capacitor C33, the cathode of the diode D33 is connected with pin 8 of the step-down voltage regulator U1, and the anode of the diode D33 is grounded; pin 7 and pin 9 of step-down voltage regulator U1 are connected to each other and to ground; a second end of the inductor L31 is connected with a capacitor C36, a capacitor C37, a capacitor C38 and a capacitor C39, first ends of the capacitor C36, the capacitor C37, the capacitor C38 and the capacitor C39 are connected with a second end of the inductor L31, second ends of the capacitor C36, the capacitor C37, the capacitor C38 and the capacitor C39 are connected with one another and grounded, a first end of the capacitor C39 is connected with a resistor R32, a first end of the capacitor C39 outputs 6.6V, the other end of the resistor R32 is connected with a pin 5 of the step-down voltage stabilizer U1 and is connected with a resistor R33, and the other end of the resistor R33 is grounded; pin 3 of the fixed voltage regulator U2 is connected to the first end of the capacitor C39, pin 1 of the fixed voltage regulator U2 is grounded, pin 2 of the fixed voltage regulator U2 is connected to the first end of the capacitor C322, the second end of the capacitor C322 is grounded, the first end of the capacitor C322 is connected to the anode of the polar capacitor C31, and the cathode of the polar capacitor C31 is connected to the second end of the capacitor C322; the anode of the polar capacitor C31 is connected with the first end of the single-pole single-throw switch S2, the second end of the single-pole single-throw switch S2 outputs 5V and is connected with a resistor R34, the other end of the resistor R34 is connected with a light-emitting diode D35, the anode of the light-emitting diode D35 is connected with the other end of the resistor R34, and the cathode of the light-emitting diode D35 is grounded; the VBUS pin of the USB connector J1 is connected with the other end of the single-pole single-throw switch S2, the GND pin of the USB connector J1 is grounded, the SHLD pin 5 of the USB connector J1 is connected with a capacitor C312, the SHLD pin 6 of the USB connector J1 is connected with a resistor R31, the SHLD pin 5 and the SHLD pin 6 of the USB connector J1 are connected with each other, and the other end of the capacitor C312 and the other end of the resistor R31 are connected with each other and grounded; as shown in fig. 14, the 3.3V power supply module includes a power socket J2, a capacitor C16, a diode D5, a common mode inductor L3, a voltage regulator U11, a capacitor C12, and a capacitor C6, the model of the power socket J2 is DC-044, the model of the voltage regulator U11 is ADM7172ACPZ-3.3-R7, the model of the common mode inductor L3 is ACM9070-601-2P, a pin J2 and a pin 1 of the power socket J2 are connected to the 5V output terminal of the main power supply module, and the pin 1 of the power socket J2 is grounded; a first end of the capacitor C16 is connected with pin 2 of a power socket J2, and a second end of the capacitor C16 is connected with pin 1 of a power socket J2; the cathode of the diode D5 is connected to the first end of the capacitor C16, and the anode of the diode D5 is connected to the second end of the capacitor C16; pin 1 of the common-mode inductor L3 is connected with the cathode of the diode D5, pin 2 of the common-mode inductor L3 is connected with the anode of the diode D5, pin 3 of the common-mode inductor L3 is grounded, pin 4 of the common-mode inductor L3 outputs 5V and is connected with a capacitor C4, and the other end of the capacitor C4 is grounded; pin 8, pin 7 and pin 5 of a voltage stabilizer U11 are connected with each other and with pin 4 of a common mode inductor L3, pin 4 of a voltage stabilizer U11 is connected with a capacitor C47, pin 6 and pin 9 of the voltage stabilizer U11 are connected with each other and with the other end of a capacitor C47, pin 6 of a voltage stabilizer U11 is grounded, pin 1, pin 2 and pin 3 of a voltage stabilizer U11 are connected with each other and with a capacitor C12, a first end of a capacitor C12 is connected with pin 1 of the voltage stabilizer U11 and pin 1 of a voltage stabilizer U11 outputs DP3V3, a second end of the capacitor C12 is grounded, a first end of the capacitor C12 is connected with a capacitor C6 and a resistor R33, the other end of the capacitor C6 is connected with a second end of a capacitor C12, the other end of a resistor R33 is connected with a light emitting diode D6, an anode of the light emitting diode D6 is connected with the other end of the resistor R33, and a cathode of the light emitting diode D6 is grounded; as shown in fig. 15, the 12V power supply module includes a step-down voltage regulator U21, an inductor L5, a diode D3, a resistor R1, a resistor R5, a capacitor C19, and a bidirectional transient suppression diode D4, where the step-down voltage regulator U21 is of the type TPS61085PWR, the bidirectional transient suppression diode D4 is of the type PLZ12C, pin 3, pin 7, and pin 6 of the step-down voltage regulator U21 are all connected to a first end of the inductor L5, a second end of the inductor L5 is connected to pin 5 of the step-down voltage regulator U21, a first end of the inductor L5 is connected to a capacitor C36 and to a 5V output terminal of the main power supply module, a second end of the capacitor C36 is grounded, a first end of the capacitor C36 is connected to a capacitor C37, and the other end of the capacitor C37 is connected to a second end of the capacitor C36; pin 4 of step-down voltage regulator U21 is grounded; pin 1 of the step-down voltage stabilizer U21 is connected with a first end of a resistor R5, a second end of the resistor R5 is connected with a first end of a capacitor C19, a pin 8 of the step-down voltage stabilizer U21 is connected with a capacitor C17, and the other end of the capacitor C17 is connected with a second end of the capacitor C19 and grounded; the anode of the diode D3 is connected with the second end of the inductor L5, the cathode of the diode D3 is connected with the capacitor C14, the capacitor C11 and the capacitor C18, the first ends of the capacitor C14, the capacitor C11 and the capacitor C18 are connected with the cathode of the diode D3, the second ends of the capacitor C11 and the capacitor C18 are connected with each other and grounded, the first end of the capacitor C18 outputs 12V and is connected with the cathode of the bidirectional transient suppression diode D4, and the anode of the bidirectional transient suppression diode D4 is grounded; a first end of the resistor R1 is connected with a cathode of the diode D3, a second end of the resistor R1 is connected with a pin 2 of the step-down voltage regulator U21, the pin 2 of the step-down voltage regulator U21 is connected with a resistor R2, and the other end of the resistor R2 is grounded; as shown in fig. 16, the micro control module includes a microcontroller U10, the LED lamp comprises a four-pin crystal oscillator Y2 and a circuit monitor U5, wherein the model of a microcontroller U10 is LPC1549JBD48, the model of a circuit monitor U5 is ADM809SARTZ, a pin 5 of the microcontroller U10 is connected with a resistor R3, a pin 24 of the microcontroller U10 is connected with a resistor R39, the other ends of a resistor R3 and a resistor R39 are connected with each other and input VDD3V3, a pin 27 of the microcontroller U10 is connected with a light emitting diode, the cathode of the light emitting diode is connected with a pin 27 of the microcontroller U10, the anode of the light emitting diode is connected with a resistor R4, the other end of the resistor R4 is input with VDD3V3, a pin 26 of the microcontroller U10 is connected with a resistor R12, the other end of the resistor R12 is connected with an OUT pin of the four-pin crystal oscillator Y2, the VDD pin of the four-pin crystal oscillator Y2 is connected with a capacitor C45 and an inductor L11, the other end of the L11 is input with VDD3V3, and the other end of the capacitor C45 is connected with a GND pin of the four-pin 2; pin 34 of the microcontroller U10 is connected with pin 2 of the circuit monitor U5, pin 2 of the circuit monitor U5 is connected with a resistor R13, the other end of the resistor R13 is grounded, pin 3 of the circuit monitor U5 is input with VDD3V3, and pin 1 of the monitor U5 is grounded; pin 30, pin 16, pin 14, pin 10, pin 27, pin 42 and pin 39 of the microcontroller U10 are connected with each other and input into VDD3V3, pin 17, pin 11, pin 20, pin 40 and pin 41 of the microcontroller U10 are connected with each other and grounded, a capacitor C48 is connected between pin 30 and pin 17 of the microcontroller U10, and a capacitor C55, a capacitor C58, a capacitor C59, a capacitor C60 and a capacitor C49 are connected in parallel to the capacitor C48; the VDD3V3 input end of the microcontroller U10 is connected with the DP3V3 output end of the 3.3V power supply module; as shown in fig. 17, the real-time clock module includes a real-time clock chip U15 and a capacitor C13, the model of the real-time clock chip U15 is DS3231SN, pin 2 of the real-time clock chip U15 is connected with a resistor R26 and a capacitor C7, the other end of the resistor R26 is connected with a resistor R27 and inputs VDD3V3, the other end of the resistor R27 is connected with pin 3 of the real-time clock chip U15, pin 6, pin 7 and pin 8 of the real-time clock chip U15 are connected with each other and with the other end of the capacitor C7, pin 6 of the real-time clock chip U15 is grounded, pin 14 of the real-time clock chip U15 is connected with a capacitor C13 and a battery BAT1, pin 9, pin 10, pin 11 and pin 12 of the real-time clock chip U15 are connected with each other and with the other end of the capacitor C13, the other end of the capacitor C13 is grounded, and the other end of the battery BAT1 is grounded; as shown in fig. 18, the microcontroller U10 is connected with a CAN data transceiver module, the CAN data transceiver module includes a CAN data transceiver U7, a three-pin connector P3 and an ESD electrostatic protection diode D2, the model of the CAN data transceiver U7 is TJA1051T-3, pin 7 of the CAN data transceiver U7 is connected with pin 3 of the three-pin connector P3, pin 6 of the CAN data transceiver U7 is connected with pin 1 of the three-pin connector P3, pin 1 of the ESD electrostatic protection diode D2 is connected with pin 6 of the CAN data transceiver U7, pin 2 of the ESD electrostatic protection diode D2 is connected with pin 7 of the CAN data transceiver U7, and pin 3 of the ESD electrostatic protection diode D2 is grounded; a pin 7 of the CAN data transceiver U7 is connected with a resistor R22, a pin 6 of the CAN data transceiver U7 is connected with a resistor R23, the other end of the resistor R22 and the other end of the resistor R23 are mutually connected and connected with a capacitor C44, and the other end of the capacitor C44 is grounded; a pin 2 of the three-pin connector P3 is connected with a capacitor C50, the other end of the capacitor C50 is grounded, and a resistor R50 is connected to the capacitor C50 in parallel; a pin 3 of the CAN data transceiver U7 inputs VDD5V and is connected with a capacitor C43, the other end of the capacitor C43 is grounded, and a capacitor C9 is connected to the capacitor C43 in parallel; a pin 5 of the CAN data transceiver U7 is connected with a capacitor C1 and input VDD3V3, the other end of the capacitor C1 is grounded, and a capacitor C41 is connected to the capacitor C1 in parallel; pin 8 of the CAN data transceiver U7 is connected with a resistor R28, a first end of the resistor R28 is connected with pin 8 of the CAN data transceiver U7, and a second end of the resistor R28 is connected with pin 2 of the CAN data transceiver U7 and grounded; pin 4 of the CAN data transceiver U7 is connected with a resistor R19, and pin 1 of the CAN data transceiver U7 is connected with a resistor R20; a first end of the resistor R28 is connected with a pin 18 of the microcontroller U10, the other end of the resistor R19 is connected with a pin 21 of the microcontroller U10, and the other end of the resistor R20 is connected with a pin 13 of the microcontroller U10; the input end of VDD5V of the CAN data transceiver module is connected with the 5V output of the 3.3V power supply module, and the input end of VDD3V3 of the CAN data transceiver module is connected with the DP3V3 output of the 3.3V power supply module; as shown in fig. 23, the interface module includes a connector P9 and a rejector RP5, the connector P9 is a Header23X2, pins 1, 2, 43, 44, 45 and 46 of the connector P9 are grounded, pins 3 and 4 of the connector P9 are connected to the DP3V3 output terminal of the 3.3V power supply module, pins 5 and 6 of the connector P9 are connected to the 5V output terminal of the main power supply module, pin 11 of the connector P9 is connected to pin 43 of the microcontroller U10, and pin 13 of the connector P9 is connected to pin 44 of the microcontroller U10; the first input end, the second input end, the third input end and the fourth input end of the resistor are mutually connected and are in output connection with DP3V3 of a 3.3V power supply module, the first output end of the resistor is connected with a pin 20 of a connector P9 and a pin 15 of a real-time clock chip U15, the second output end of the resistor is connected with a pin 19 of a connector P9 and a pin 16 of a real-time clock chip U15, the third output end of the resistor is connected with a pin 18 of a connector P9, and the fourth output end of the resistor is connected with a pin 17 of a connector P9; pin 23 of connector P9 is connected with capacitor C15, pin 25 of connector P9 is connected with capacitor C20, pin 27 of connector P9 is connected with capacitor C23, pin 29 of connector P9 is connected with capacitor C22, and the other end of capacitor C15, the other end of capacitor C20, the other end of capacitor C23 and the other end of capacitor C22 are connected with each other and grounded; as shown in fig. 24, the indicator light module is connected to the connector P9, and includes a light emitting diode D7 and a resistor R8, an anode of the light emitting diode D7 is connected to the pin 15 of the connector P9, a cathode of the light emitting diode D7 is connected to one end of a resistor R8, and the other end of the resistor R8 is grounded; as shown in fig. 20, the key and alarm interface module includes a bar RP1, a bar RP2, a bar RP3, a bar RP4 and a 10-pin connector P7, pin 2 of the bar RP3 is connected with pin 9 of the 10-pin connector P7, pin 4 of the bar RP3 is connected with pin 8 of the 10-pin connector P7, pin 6 of the bar RP3 is connected with pin 7 of the 10-pin connector P7, and pin 8 of the bar RP3 is connected with pin 6 of the 10-pin connector P7; pin 2 of the resistor RP4 is connected with pin 5 of the 10-pin connector P7, pin 4 of the resistor RP4 is connected with pin 4 of the 10-pin connector P7, pin 6 of the resistor RP4 is connected with pin 3 of the 10-pin connector P7, and pin 8 of the resistor RP4 is connected with pin 1 of the 10-pin connector P7; pin 10 of the 10-pin connector P7 is grounded, pin 2 of the 10-pin connector P7 is connected with a capacitor C21 and an inductor L6, the other end of the capacitor C21 is grounded, and the other end of the inductor L6 is connected with the 5V output end of the main power supply module; pin 1, pin 3, pin 5 and pin 7 of the exclusion RP2 are connected to each other, pin 1, pin 3, pin 5 and pin 7 of the exclusion RP1 are connected to each other, pin 1 of the exclusion RP2 and pin 1 of the exclusion RP1 are connected to each other and input to VDD3V3, pin 2 of the exclusion RP2 is connected to pin 8 of the exclusion RP4, pin 4 of the exclusion RP2 is connected to pin 6 of the exclusion RP4, pin 6 of the exclusion RP2 is connected to pin 4 of the exclusion RP4, and pin 8 of the exclusion RP2 is connected to pin 2 of the exclusion RP 4; pin 2 of the exclusion RP1 is connected with pin 8 of the exclusion RP3, pin 6 of the exclusion RP1 is connected with pin 6 of the exclusion RP3, pin 6 of the exclusion RP1 is connected with pin 4 of the exclusion RP3, and pin 8 of the exclusion RP1 is connected with pin 2 of the exclusion RP 3; pin 1 of exclusion RP3 is connected to pin 29 of connector P9, pin 3 of exclusion RP3 is connected to pin 30 of connector P9, pin 5 of exclusion RP3 is connected to pin 27 of connector P9, pin 7 of exclusion RP3 is connected to pin 28 of connector P9, pin 1 of exclusion RP4 is connected to pin 25 of connector P9, pin 3 of exclusion RP4 is connected to pin 26 of connector P9, pin 5 of exclusion RP4 is connected to pin 23 of connector P9, and pin 7 of exclusion RP4 is connected to pin 24 of connector P9; VDD3V3 in the key and alarm interface module is connected with DP3V3 output of the 3.3V power supply module; as shown in fig. 19, the resistive touch screen interface module includes a 6-pin connector P6, an inductor L12, an inductor L13, an ESD protection chip U16, and a resistor pack LP1, where the model of the ESD protection chip U16 is PRTR5V0U2X, pin 3 of the ESD protection chip U16 is connected to pin 1 of the 6-pin connector P6, pin 2 of the ESD protection chip U16 is connected to pin 2 of the 6-pin connector P6, pin 1 of the ESD protection chip U16 is grounded, and pin 4 VDD of the ESD protection chip U16 is input to VDD3V 3; pin 3 of the 6-pin connector P6 is connected with pin 1 of the exclusion LP1, pin 4 of the 6-pin connector P6 is connected with pin 3 of the exclusion LP1, pin 5 of the 6-pin connector P6 is connected with pin 5 of the exclusion LP1, and pin 6 of the 6-pin connector P6 is connected with pin 7 of the exclusion LP 1; a capacitor C62 is connected to a pin 3 of the 6-pin connector P6, a capacitor C63 is connected to a pin 4 of the 6-pin connector P6, a capacitor C75 is connected to a pin 5 of the 6-pin connector P6, and the other ends of the capacitor C62, the capacitor C63 and the capacitor C75 are connected with one another and grounded; a first end of the inductor L12 is connected with pin 1 of the 6-pin connector P6, and a first end of the inductor L13 is connected with pin 2 of the 6-pin connector P6; the second end of the inductor L12 is connected with a pin 18 of the connector P9, the second end of the inductor L13 is connected with a pin 17 of the connector P9, a pin 2 of the resistor LP1 is connected with a pin 41 of the connector P9, a pin 4 of the resistor LP1 is connected with a pin 42 of the connector P9, a pin 6 of the resistor LP1 is input to VDD3V3, and a pin 8 of the resistor LP1 is grounded; the VDD3V3 input of the resistance touch screen interface module is connected with the DP3V3 output of the 3.3V power supply module; as shown in fig. 21, the display panel driving module includes a video signal conversion chip U4, an electrostatic protection device U12, an electrostatic protection device U13 and a connector P4, the model of the video signal conversion chip U4 is THC63LVDM83D, the models of the electrostatic protection device U12 and the electrostatic protection device U13 are TPD4E05U06DQA, the model of the connector P4 is FI-X30HL, and pin 51, pin 50, pin 2, pin 8, pin 10, pin 15, pin 16, pin 17, pin 18, pin 25, pin 5, pin 13, pin 21, pin 29, pin 33, pin 35, pin 36, pin 43, pin 49 and pin 53 of the video signal conversion chip U4 are grounded; a pin 31 of the video signal conversion chip U4 is connected with a resistor R31, and a pin 26 and a pin 9 of the video signal conversion chip U4 are connected with each other and input with DP3V 3; a pin 34 of the video signal conversion chip U4 is connected with an inductor L2 and a capacitor C40, the other end of the inductor L2 is input into DP3V3, the other end of the capacitor C40 is grounded, and a capacitor C3 is connected in parallel with a capacitor C40; a pin 44 of the video signal conversion chip U4 is connected with an inductor L7 and a capacitor C32, the other end of the inductor L7 is input into DP3V3, the other end of the capacitor C32 is grounded, and a capacitor C33 is connected in parallel with a capacitor C32; a pin 32 of the video signal conversion chip U4 is connected with a resistor R11, and the other end of the resistor R11 is input with DP3V 3; the pin 1 of the video signal conversion chip U4 inputs DP3V3, and the pin 31 of the video signal conversion chip U4 is connected with a resistor R18; pin 48 of the video signal conversion chip U4 is connected to pin 1 of the electrostatic protector U12, pin 47 of the video signal conversion chip U4 is connected to pin 2 of the electrostatic protector U12, pin 46 of the video signal conversion chip U4 is connected to pin 4 of the electrostatic protector U12, pin 45 of the video signal conversion chip U4 is connected to pin 5 of the electrostatic protector U12, pin 8 and pin 2 of the electrostatic protector U12 are connected to each other and grounded, pin 10 of the electrostatic protector U12 is connected to pin 18 of the connector P4, pin 9 of the electrostatic protector U12 is connected to pin 17 of the connector P4, pin 7 of the electrostatic protector U12 is connected to pin 15 of the connector P4, and pin 6 of the electrostatic protector U12 is connected to pin 14 of the connector P4; pin 42 of the video signal conversion chip U4 is connected to pin 1 of the electrostatic protector U13, pin 42 of the video signal conversion chip U4 is connected to pin 1 of the electrostatic protector U13, pin 41 of the video signal conversion chip U4 is connected to pin 2 of the electrostatic protector U13, pin 40 of the video signal conversion chip U4 is connected to pin 4 of the electrostatic protector U13, pin 39 of the video signal conversion chip U4 is connected to pin 5 of the electrostatic protector U13, pin 10 of the electrostatic protector U13 is connected to pin 12 of the connector P4, pin 9 of the electrostatic protector U13 is connected to pin 11 of the connector P4, pin 7 of the electrostatic protector U13 is connected to pin 9 of the connector P4, pin 6 of the electrostatic protector U13 is connected to pin 8 of the connector P4, and pin 8 and pin 3 of the electrostatic protector U13 are connected to each other and grounded; pin 30, pin 29, pin 26, pin 23, pin 20, pin 19, pin 16, pin 13, pin 10, pin 7, pin 4, pin 3, and pin 1 of the connector P4 are grounded; pin P1 and pin P2 of connector P4 are grounded; pin 28 and pin 27 of connector P4 are connected with inductor L1 and capacitor C5, the other end of inductor L1 inputs 12V, the other end of capacitor C5 is grounded, pin 22 and pin 21 of connector P4 are connected with inductor L4 and capacitor C35, the other end of inductor L4 inputs DP3V3, the other end of capacitor C35 is grounded, and capacitor C28 is connected in parallel with capacitor C35; a pin 6 of the connector P4 is connected with a resistor R16, the other end of the resistor R16 is input with DP3V3, and a pin 5 of the connector P4 is grounded; pin 2 of the connector P4 is connected with a resistor R17 and a resistor R21, the other end of the resistor R17 is input with DP3V3, and the other end of the resistor R21 is grounded; a capacitor C2 is connected between the DP3V3 input end of the video signal conversion chip U4 and the ground end, and a capacitor 29, a capacitor 30, a capacitor 31 and a capacitor 34 are connected to the capacitor C2 in parallel; the DP3V3 input end of the video signal conversion chip U4 and the DP3V3 input end of the connector P4 are connected with the DP3V3 output of the 3.3V power supply module, and the 12 input end of the connector P4 is connected with the 12V output end of the 12V power supply module; as shown in fig. 22, a backlight adjusting interface module is connected to the connector P4, the backlight adjusting interface module includes a connector P8, a field effect transistor Q4 and a field effect transistor Q5, the connector P8 is of Header23X2, the field effect transistor Q4 and the field effect transistor Q5 are of NX7002AK, and pin 1 and pin 2 of the connector P8 are grounded; pin 1 of a field effect transistor Q4 is connected with pin 19 of a connector P8, pin 2 of a field effect transistor Q4 is grounded, pin 3 of the field effect transistor Q4 is connected with a resistor R29 and an inductor L17, the other end of the resistor R29 is input with DP3V3, and the other end of the inductor L17 is connected with pin 24 of a connector P4; pin 1 of a field effect transistor Q5 is connected with pin 26 of a connector P8, pin 2 of a field effect transistor Q5 is grounded, pin 3 of the field effect transistor Q5 is connected with a resistor R30 and an inductor L18, the other end of the resistor R30 is input with DP3V3, and the other end of the inductor L18 is connected with pin 25 of a connector P4; pin 27 of connector P8 is connected to pin 28 of video signal conversion chip U4, pin 28 of connector P8 is connected to the other end of resistor R18, pin 29 of connector P8 is connected to pin 27 of video signal conversion chip U4, pin 30 of connector P8 is connected to pin 30 of video signal conversion chip U4, pin 31 of connector P8 is connected to pin 56 of video signal conversion chip U4, pin 32 of connector P8 is connected to pin 3 of video signal conversion chip U4, pin 33 of connector P8 is connected to pin 55 of video signal conversion chip U4, pin 34 of connector P8 is connected to pin 52 of video signal conversion chip U4, pin 35 of connector P8 is connected to pin 54 of video signal conversion chip U4, pin 36 of connector P8 is connected to pin 14 of video signal conversion chip U4, pin 37 of connector P8 is connected to pin 5811 of video signal conversion chip U24, pin 38 of connector P8 is connected to pin 12 of video signal conversion chip U4, pin 39 of connector P8 is connected to pin 6 of video signal conversion chip U4, pin 40 of connector P8 is connected to pin 7 of video signal conversion chip U4, pin 41 of connector P8 is connected to pin 24 of video signal conversion chip U4, pin 42 of connector P8 is connected to pin 4 of video signal conversion chip U4, pin 43 of connector P8 is connected to pin 22 of video signal conversion chip U4, pin 44 of connector P8 is connected to pin 23 of video signal conversion chip U4, and pin 46 of connector P8 is connected to pin 20 of video signal conversion chip U4; pin 43 of connector P8 is connected to switch BOOT, the other end of switch BOOT is grounded; the data transceiving end of the CAN data transceiver U7 is connected with the CAN interface of the main controller through a CAN bus.

As shown in fig. 25 to 26, the battery charging and protecting unit includes a battery charging module and a battery protecting module, which are connected; as shown in fig. 25, the battery charging module includes a battery charging management U1 chip, a battery power management U3 chip, an ESD electrostatic protection U2 chip, a signal isolator U4 and an RP1 exclusion, the battery power management U1 chip is CN3765, the battery power management U3 chip is LTC2944, and the ESD electrostatic protection U2 chip is PRTR5V0U 4D; signal isolator U4 is TLP 181; the 1 pin of the battery charging management U1 chip is connected with one end of a C3 capacitor, the other end of a C3 capacitor is connected with a C9 capacitor, the other end of the C3 capacitor is also connected with a C2 capacitor, the other end of a C3 capacitor is also connected with a C1 capacitor, the other end of the C3 capacitor is also connected with a D2 voltage stabilizing diode, the C3 capacitor, the C9 capacitor, the C2 capacitor, the C1 capacitor and the D2 voltage stabilizing diode are connected and then connected with a direct-current voltage 24V, and the other ends of the C9 capacitor, the C2 capacitor, the C1 capacitor and the D2 voltage stabilizing diode are connected and then grounded; the other end of the C3 capacitor is also connected with a source S of a Q1 field effect transistor, a grid G at the other end of the Q1 field effect transistor is connected with a D1 diode, the other end of the D1 diode is connected with a D3 diode, the other end of the D3 diode is grounded, the other end of the D1 diode is also connected with an R5 resistor, the other end of the R5 resistor is connected with a C7 capacitor, and the other end of the C7 capacitor is grounded; the other end of the diode D1 is also connected with one end of an inductor L1, the other end of the inductor L1 is connected with a resistor R1, the other end of the resistor R1 is connected with a capacitor C10, the other end of the resistor R1 is connected with a capacitor C5, the other end of the resistor R1 is connected with a capacitor C6, the other ends of the resistor R1, the capacitor C10, the capacitor C5 and the capacitor C6 are connected and then connected with the anode of the battery, and the other ends of the capacitor C10, the capacitor C5 and the capacitor C6 are connected and then grounded; the 2 pin of the battery charging management U1 chip is grounded; the 3 pin of the battery charging management U1 chip is connected with a D4 light emitting diode, and the other end of the D4 light emitting diode is connected with an R7 resistor; the 4 pins of the battery charging management U1 chip are connected with a D5 light emitting diode, the other end of the D5 light emitting diode is connected with an R6 resistor, and the R7 resistor is connected with an R6 resistor and then connected with an R9 resistor in series and then connected with a power supply voltage; the 5 pins of the battery charging management U1 chip are connected with an R2 resistor, the other end of the R2 resistor is connected with a C4 capacitor, and the other end of the C4 capacitor is grounded; the 6 pins of the battery charging management U1 chip are connected with the other end of the R3 resistor and then connected with the R4 resistor, and the other end of the R4 resistor is grounded; 7 pins of a battery charging management U1 chip are connected with an R1 resistor and then connected with an R3 resistor; 8 pins of a battery charging management U1 chip are connected with an L1 inductor and then connected with an R1 resistor; the 9 pin of the battery charging management U1 chip is connected with the other end of the C3 capacitor and then is connected with the C9 capacitor; the 10 pins of the battery charging management U1 chip are connected with the drain D of the Q1 field effect transistor; the 1 pin of the battery power management U3 chip is connected with a C8 capacitor, the other end of the C8 capacitor is connected with the 2 pin, the 3 pin, the 7 pin and the 0 pin of the battery power management U3 chip and then grounded, the 1 pin of the battery power management U3 chip is also connected with a D6 voltage-stabilizing diode, and the other end of the D6 voltage-stabilizing diode is grounded; 4 pins of a battery power management U3 chip are connected with 4 pins of an RP1 exclusion, 5 pins of a battery power management U3 chip are connected with 3 pins of an RP1 exclusion, and 6 pins of a battery power management U3 chip are connected with 1 pin of an RP1 exclusion; the 8 pins of the battery power management U3 chip are connected with an R8 resistor, the 8 pins of the battery power management U3 chip are connected with an R8 resistor and then connected with the output end of the battery, and the R8 resistor is connected with the 1 pin of the battery power management U3 chip and then connected with the other end of an R1 resistor and then connected with an R3 resistor; the 1 pin of the ESD electrostatic protection U2 chip is connected with the 5 pins of the RP1 resistor bank; the 2 pin of the ESD electrostatic protection U2 chip is grounded; 4 pins of the ESD electrostatic protection U2 chip are connected with 8 pins of an RP1 resistor bank; 6 pins of the ESD electrostatic protection U2 chip are connected with 6 pins of an RP1 resistor bank; the 1 pin of the signal isolator U4 is connected with the R11 resistor and then is connected with the power supply voltage; a pin 2 of the signal isolator U4 is connected with the sleep mode, a pin 3 of the signal isolator U4 is connected with the 5V power supply voltage of the battery pack, and a pin 4 of the signal isolator U4 is connected with the sleep mode of the battery pack; as shown in fig. 26, the battery protection module includes a battery protection U4 chip, the model of the battery protection U4 chip is BQ77915, a pin 1 of the battery protection U4 chip is connected to a C1 capacitor, the other end of the C1 capacitor is grounded, a pin 1 of the battery protection U4 chip is further connected to a R8 resistor, the other end of the R8 resistor is connected to a R1 resistor, the other end of the R1 resistor is grounded, the other end of the R8 resistor is further connected to a supply voltage, a pin 1 of the battery protection U4 chip is further connected to a R4 resistor, the other end of the R4 resistor is connected to a D1 zener diode, the R4 resistor is further connected to a D6 zener diode, the D1 zener diode is connected to a D6 zener diode and then grounded, the R4 resistor is further connected to a D3 resistor, and the R4 resistor is further connected to a D5 zener diode; the D3 zener diode is connected with the D5 zener diode and then connected with the R31 resistor, the other end of the R31 resistor is connected with the 14 pin of the U4 chip for battery protection, the D3 zener diode is connected with the D5 zener diode and then connected with the D4 diode, the D3 zener diode is connected with the D5 zener diode and then connected with the R30 resistor, the D4 diode is connected with the R30 resistor and then connected with the R28 resistor, the D4 diode is connected with the R30 resistor and then connected with the grid G of the Q3 FET, the other end of the R28 resistor is connected with the R24 resistor, the other end of the R24 resistor is connected with the 13 pin of the U4 chip for battery protection, the D2 diode is connected in parallel with the R28 resistor, and the D2 diode is connected with the R28 resistor and then connected with the drain D of the Q3 FET; the D3 zener diode is connected with the D5 zener diode and then connected with the grid G of the Q3 field effect transistor, and the D3 zener diode is connected with the D5 zener diode and then connected with PACK-; the D3 zener diode is connected with the D5 zener diode and then connected with a C19 capacitor, the other end of the C19 capacitor is connected with a C18 capacitor, the source S of the other end of the Q3 field effect transistor is connected with the source S of the Q4 field effect transistor, the grid G of the other end of the Q4 field effect transistor is connected with the C18 capacitor, the grid G of the other end of the Q4 field effect transistor is also connected with an R33 resistor, and the other end of the R33 resistor is connected with the D1 zener diode and the D6 zener diode and then grounded; the 2 pin of the battery protection U4 chip is connected with a C12 capacitor, and the other end of the C12 capacitor is grounded; the 3 pin of the battery protection U4 chip is connected with an R5 resistor, the other end of an R5 resistor is connected with the other end of an R4 resistor and then connected with a D1 voltage stabilizing diode, and the 3 pin of the battery protection U4 chip is connected with a C3 capacitor; the 4-pin of the battery protection U4 chip is connected with the R9 resistor, the 4-pin of the battery protection U4 chip is also connected with the other end of the C3 capacitor, and the 4-pin of the battery protection U4 chip is also connected with the C6 capacitor; a 5 pin of the battery protection U4 chip is connected with the R10 resistor, a 5 pin of the battery protection U4 chip is also connected with the other end of the C6 capacitor, and a 5 pin of the battery protection U4 chip is also connected with the C8 capacitor; the 6 pin of the battery protection U4 chip is connected with the R11 resistor, the 6 pin of the battery protection U4 chip is also connected with the other end of the C8 capacitor, and the 6 pin of the battery protection U4 chip is also connected with the C9 capacitor; the 7 pin of the battery protection U4 chip is connected with the R14 resistor, the 7 pin of the battery protection U4 chip is also connected with the other end of the C9 capacitor, and a battery voltage signal is connected with the 3 pin, the 4 pin, the 5 pin, the 6 pin and the 7 pin of the battery protection U4 chip through the R5 resistor, the R9 resistor, the R10 resistor, the R11 resistor and the R14 resistor respectively and then is connected with the anode of the battery pack; the 7 pin of the battery protection U4 chip is also connected with a C10 capacitor, and the other end of the C10 capacitor is grounded; the 8 pin of the battery protection U4 chip is connected with a C11 capacitor, the other end of the C11 capacitor is grounded, the 8 pin of the battery protection U4 chip is also connected with an R16 resistor, and the other end of the R16 resistor is connected with a D1 voltage stabilizing diode and the cathode of the battery pack; the 9 pin of the battery protection U4 chip is grounded; the 10 pin of the battery protection U4 chip is connected with a C14 capacitor, the other end of a C14 capacitor is grounded, the 10 pin of the battery protection U4 chip is connected with an R26 resistor, the other end of an R26 resistor is connected with a D1 voltage stabilizing diode and then connected with an R33 resistor, the 11 pin of the battery protection U4 chip is connected with a C15 capacitor, the other end of the C15 capacitor is grounded, the 11 pin of the battery protection U4 chip is connected with the R27 resistor, the other end of the R27 resistor is connected with the other end of the R33 resistor, and a C13 capacitor is connected between the 10 pin and the 11 pin of the battery protection U4 chip in parallel; the 12 pins of the battery protection U4 chip are connected with an R23 resistor, the other end of an R23 resistor is connected with an R29 resistor, the other end of an R29 resistor is connected with the other end of an R33 resistor, and the other end of an R23 resistor is connected with a drain D of a Q4 field effect transistor; the 16 pins of the battery protection U4 chip are grounded; a 17 pin of the battery protection U4 chip is connected with the R2 resistor, and the other end of the R2 resistor is grounded; the R6 resistor is connected between the 18 pin and the 19 pin of the battery protection U4 chip and is connected with the magnetic voltage stabilizer TS, the 22 pin of the battery protection U4 chip is connected with the R7 resistor, and the other end of the R7 resistor is connected with the 2 pin of the signal isolator U4 in the battery charging module; the 23 pin and the 24 pin of the battery protection U4 chip are connected and then grounded; two ends of the D3 zener diode and the D5 zener diode are respectively connected with the anode and the cathode of the battery protection board, and the signal transceiving end of the battery power management U3 chip is connected with the power supply unit.

As shown in fig. 27-32, the motor driving unit includes a motor control module, a hall sensor interface module, a motor CAN interface module, a motor voltage conversion module, a motor driving module, and a motor rotation detection module, and the hall sensor interface module, the motor CAN interface module, the motor voltage conversion module, the motor driving module, and the motor rotation detection module are all connected to the motor control module; as shown in fig. 27-29, the motor control module includes a micro-detector U7 chip, a low voltage detection and reset U2 chip, a P3 interface and a P4 interface; the model of the micro detector U7 chip is LPC1549JBD48, the model of the low-voltage detection and reset U2 chip is CAT809STBI-GT3, and a pin 1 of the micro detector U7 chip is connected with the motor voltage conversion module; the 2 pin of the micro detector U7 chip is connected with the power supply voltage 3.3V through an R1 resistor, and the 2 pin of the micro detector U7 chip is grounded through a C4 capacitor; pins 3, 4, 6, 7, 9, 18, 28 and 43 of the micro-detector U7 chip are connected with the motor driving module; the 5 pins of the micro-detector U7 chip are connected with the supply voltage DP3.3V through an R4 resistor; the pins 8, 15, 37 and 38 of the micro-detector U7 chip are connected with a motor rotation detection module; the 12 pin, the 13 pin and the 21 pin of the micro-detector U7 chip are connected with a motor CAN interface module; the 22 pin of the micro detector U7 chip is connected with the 1 pin of the P3 interface, and the 23 pin of the micro detector U7 chip is connected with the 2 pin of the P3 interface; the 3 pin of the P3 interface is grounded; the 24 pins of the micro-detector U7 chip are connected with a supply voltage DV3.3V through an R5 circuit; the 44 pin and the 45 pin of the micro detector U7 chip are connected with a power supply voltage DV3.3V through an R18 resistor and an R17 resistor respectively; a 46 pin of a micro-detector U7 chip is connected with a D2 light emitting diode, and meanwhile, a power supply voltage DP3.3V is connected with a D2 light emitting diode through an R8 resistor to supply power for a D2 light emitting diode; the 47 pin of the micro-detector U7 chip is connected with the Hall sensor interface module; a 25 pin and a 26 pin of a micro detector U7 chip are respectively connected with a3 pin and a1 pin of a Y1 crystal oscillator, the 3 pin and the 1 pin of the Y1 crystal oscillator are respectively connected with a C17 capacitor and a C18 capacitor and then grounded, and a 2 pin of a Y1 crystal oscillator is also connected with a C17 capacitor and a C18 capacitor and then grounded; a 34 pin of the micro detector U7 chip is connected with a 2 pin of a low-voltage detection and reset U2 chip, a 33 pin of the micro detector U7 chip is connected with a 2 pin of a P4 interface, a 29 pin of the micro detector U7 chip is connected with a3 pin of a P4 interface, and a4 pin of the P4 interface is grounded; a 17 pin and an 11 pin of the micro detector U7 chip are connected and then grounded, a10 pin, a 40 pin and a 41 pin of the micro detector U7 chip are connected and then grounded, and FB2 ferrite beads are connected in parallel between the two grounding wires; the 16 pin, the 14 pin and the 10 pin of the micro detector U7 chip are connected and then connected with a power supply voltage AP3.3V, the 27 pin, the 42 pin and the 39 pin of the micro detector U7 chip are connected and then connected with a power supply voltage DP3.3V, an FB4 ferrite bead is connected in parallel between the two connecting lines, and the power supply voltage AP3.3V is grounded through a C15 capacitor and a C16 capacitor which are connected in parallel; the power supply voltage DP3.3V is grounded through a C11 capacitor, a C12 capacitor and a C13 capacitor which are connected in parallel; an R3 resistor is connected in parallel between a1 pin and a 2 pin of the low-voltage detection and reset U2 chip, one end of the R3 resistor, which is connected with the 1 pin of the low-voltage detection and reset U2 chip, is grounded, and a3 pin of the low-voltage detection and reset U2 chip is connected with a power supply voltage DP3.3V; the Hall sensor interface module comprises a P2 interface; the P2 interface is connected with the Hall sensor; a pin 1 of a P2 interface is connected with an FB1 ferrite bead, the FB1 ferrite bead is connected with a power supply voltage of 3.3V, a pin 1 of a P2 interface is also connected with a C6 capacitor, the other end of the C6 capacitor is grounded, a pin 2 of a P2 interface is connected with an R6 resistor, the other end of the R6 resistor is grounded, a pin 2 of a P2 interface is also connected with an R7 resistor and is connected with a pin 47 of a micro-detector U7 chip, and a C10 capacitor is connected in series between the pin 2 of the P2 resistor and the grounding end of the C6 capacitor; the motor CAN interface module comprises an interface integrated U4 chip; the model of the interface integrated U4 chip is CAN/TJA1051T/3, the 1 pin of the interface integrated U4 chip is connected with the 13 pin of the micro detector U7 chip, the 2 pin of the interface integrated U4 chip is grounded, the 3 pin of the interface integrated U4 chip is connected with the C25 capacitor, the other end of the C25 capacitor is grounded, the 4 pin of the interface integrated U4 chip is connected with the 21 pin of the micro detector U7 chip, the 5 pin of the interface integrated U4 chip is connected with the C23 capacitor, the other end of the C23 capacitor is grounded, the 5 pin of the interface integrated U4 chip is connected with the supply voltage 3.3V, the 6 pin and the 7 pin of the interface integrated U4 chip are respectively connected with the 2 pin and the 1 pin of the D1ESD protection diode, the 3 pin of the D1ESD protection diode is grounded, the 8 pin of the interface integrated U4 chip is connected with the R9 resistor, the other end of the R9 resistor is connected with the grounded end of the C23, the 8 pins of the interface integrated U4 chip are also connected with the 12 pins of the micro detector U7 chip; as shown in fig. 30-32, the motor voltage conversion module includes a chip of a voltage regulator U5 and a chip of a low dropout regulator U6; the model of a voltage stabilizer U5 chip is LMR14206XMK/NOPB, the model of a low dropout voltage stabilizer U6 chip is XC6206P332MR, and a power supply voltage DC24V supplies power to a voltage stabilizer U5 chip through a4 pin and a 5 pin of the voltage stabilizer U5 chip; the 4 pin and the 5 pin of the voltage stabilizer U5 chip are connected and then grounded through a C8 capacitor; the 1 pin of a voltage stabilizer U5 chip is connected with a C7 capacitor, the other end of a C7 capacitor is connected with a D3 diode, the other end of the D3 diode is grounded, the other end of a C7 capacitor is also connected with an L1 inductor, the other end of an L1 inductor is connected with an R10 resistor, the other end of an R10 resistor is connected with an R11 resistor, the other end of an R11 resistor is grounded, the L1 inductor is also connected with the anode of a C9 capacitor, the cathode of the C9 capacitor is grounded, the other end of an L1 inductor is also connected with an FB3 ferrite bead, and the other end of the FB3 ferrite bead outputs VDD5V voltage; the other end of the FB3 ferrite bead is connected with a C2 capacitor, the other end of the FB3 ferrite bead is also connected with the Vin end of a low dropout regulator U6 chip, the Vout end of the low dropout regulator U6 chip outputs DP3.3V voltage, the Vout end of the low dropout regulator U6 chip is connected with the C1 capacitor, the C1 capacitor, the C2 capacitor and the low dropout regulator U6 chip are grounded after being connected, and the low dropout regulator U6 chip is also connected with a pin 30 of the micro detector U7 chip; the other end of the resistor R12 is connected with the resistor R14, the other end of the resistor R14 is connected with the other end of the resistor R14, the other end of the resistor R14 is connected with the pin 1 of the micro detector U14; the motor driving module comprises a driving U1 chip and an RP1 resistor pack; the driving U1 chip is TMC5161-M in model, the driving U1 chip is connected with an electrostatic protection circuit, a1 pin of the driving U1 chip is grounded, a 2 pin of the driving U1 chip is connected with a C22 capacitor, the other end of a C22 capacitor is connected with a1 pin of a driving U1 chip and then grounded, a 2 pin of a driving U1 chip is also connected with a 43 pin of a micro-detector U7 chip, a3 pin of a driving U1 chip is connected with a C24 capacitor, a3 pin of a driving U1 chip is also connected with a VR3 resistor, the other end of a C24 capacitor is connected with the other end of a VR3 resistor and then grounded, a4 pin of a driving U1 chip is connected with a C14 capacitor, a4 pin of a driving U1 chip is also connected with a VR1 resistor, and the other end of a C14 capacitor is connected with the other end of a VR1 resistor and then grounded; a 5 pin of a driving U1 chip is connected with a C19 capacitor, a 5 pin of a driving U1 chip is also connected with a VR2 resistor, the other end of the C19 capacitor is connected with the other end of a VR2 and then grounded, a 6 pin of a driving U1 chip is connected with a C26 capacitor, a 6 pin of the driving U1 chip is also connected with a VR4 resistor, the other end of the C26 capacitor is connected with the other end of a VR4 resistor and then grounded, a 7 pin of the driving U1 chip is connected with a1 pin of a driving U1 chip and then grounded, and an 8 pin of the driving U1 chip is connected with a supply voltage 24V; the 9 pin of the driving U1 chip is connected with the R2 resistor, the other end of the R2 resistor is grounded, and the 9 pin of the driving U1 chip is also connected with the 28 pin of the micro detector U7 chip; the 10 pins of the driving U1 chip are connected with the 9 pins of the micro detector U7 chip, the 10 pins of the driving U1 chip are also connected with the 4 pins of the RP1 exclusion, the 11 pins of the driving U1 chip are connected with the 7 pins of the micro detector U7 chip, the 11 pins of the driving U1 chip are also connected with the 3 pins of the RP1 exclusion, the 12 pins of the driving U1 chip are connected with the 18 pins of the micro detector U7 chip, the 12 pins of the driving U1 chip are also connected with the 2 pins of the RP1 exclusion, the 13 pins of the driving U1 chip are connected with the 6 pins of the micro detector U7 chip, the 13 pins of the driving U1 chip are also connected with the 1 pin of the RP1 exclusion, and the 5 pins, 6 pins, 7 pins and 8 pins of the RP1 pin are connected with the supply voltage of 3.3V; a 14 pin of a driving U1 chip is connected with an R15 resistor, the other end of the R15 resistor is connected with a 5 pin of a micro detector U7 chip, a 15 pin of the driving U1 chip is connected with a4 pin of a micro detector U7 chip, and a 16 pin of a driving U1 chip is connected with a3 pin of a micro detector U7 chip; the motor rotation detection module comprises a position sensor U3 chip; the model of the position sensor U3 chip is AS5601, the 1 pin and the 2 pin of the position sensor U3 chip are connected with the power supply voltage of 3.3V, meanwhile, a1 pin and a 2 pin of a position sensor U3 chip are connected and then connected with a C20 capacitor and then grounded, a4 pin of a position sensor U3 chip is connected and then grounded with a C20 capacitor, a 5 pin of the position sensor U3 chip is connected with a 15 pin of a micro detector U7 chip, a 6 pin of a position sensor U3 chip is connected with a 38 pin of a micro detector U7 chip, a 6 pin of the position sensor U3 chip is also connected with an R19 resistor, a 7 pin of the position sensor U3 chip is connected with a 37 pin of a micro detector U7 chip, a 7 pin of the position sensor U3 chip is also connected with an R16 resistor, the other end of the R16 resistor is connected with the other end of the R19 resistor and then connected with a power supply voltage of 3.3V, and an 8 pin of the position sensor U3 chip is connected with an 8 pin of the micro detector U7 chip; the data transceiving end of the interface integrated U4 chip is connected with the CAN interface of the main controller through a CAN bus.

As shown in fig. 33-40, the weighing unit includes a weighing module, a digital-to-analog conversion circuit, a power conversion circuit, a weighing interface circuit, and a weighing control module, and the weighing module, the digital-to-analog conversion circuit, the power conversion circuit, and the weighing interface circuit are respectively connected to the weighing control module; 33-35, the load module includes load cell B1, load cell B2, and load cell B3; the weight sensor B1, the load cell B2 and the load cell B3 are all PW6KRC3, a1 pin of the load cell B1 is grounded, and a 2 pin of the load cell B1 outputs AIN1+/weight through a resistor R9; the 3 pin of the load cell B1 outputs AIN1-/weight through a resistor R4; the capacitor C21 is respectively connected with the resistor R9 and the resistor R4; the 4 pin of the load cell B1 is connected with an AVDD5V power supply and is grounded through a capacitor C20, the 5 pin of the load cell B1 is grounded through a resistor R11, and the load cell B1 is grounded through a capacitor C22; the 1 pin of the load cell B2 is grounded, and the 2 pin of the load cell B2 outputs AIN2+/weight through a resistor R13; the 3 pin of the load cell B2 outputs AIN2-/weight through a resistor R12; the capacitor C26 is respectively connected with the resistor R13 and the resistor R12; the 4-pin of the load cell B2 is connected with an AVDD5V power supply and is grounded through a capacitor C23, the 5-pin of the load cell B2 is grounded through a resistor R14, and the load cell B2 is grounded through a capacitor C27; the 1 pin of the load cell B3 is grounded, and the 2 pin of the load cell B3 outputs AIN3+/weight through a resistor R16; the 3 pin of the load cell B3 outputs AIN3-/weight through a resistor R15; the capacitor C25 is respectively connected with the resistor R15 and the resistor R16; the 4 pin of the load cell B3 is connected with an AVDD5V power supply and is grounded through a capacitor C24, the 5 pin of the load cell B3 is grounded through a resistor R17, and the load cell B is grounded through a capacitor C30; as shown in fig. 36, the digital-to-analog conversion circuit includes an analog-to-digital conversion U8 chip and a voltage reference U5 chip; the analog-to-digital conversion U8 chip is AD7793 BRU; the voltage reference U5 chip is NCP51460SN33T 1G; a1 pin of an analog-to-digital conversion U8 chip is connected with one end of a resistor R1, the other end of a resistor R1 is connected with a1 pin of a resistor exclusion RP1, a3 pin of an analog-to-digital conversion U8 chip is connected with a4 pin of an exclusion RP1, a 5 pin of an analog-to-digital conversion U8 chip is connected with AIN1+/weight at one end of a capacitor C21 in a load cell B1, a 6 pin of an analog-to-digital conversion U1 chip is connected with AIN1-/weight at the other end of the capacitor C1 in the load cell B1, a 7 pin of the analog-to-digital conversion U1 chip is connected with AIN1+/weight at one end of the capacitor C1 in the load cell B1, an 8 pin of the analog-to AIN1-/weight at the other end of the capacitor C1 in the load cell B1, an AIN1+/weight of the analog-to the load cell B1, and an AIN1+/weight at the other end of the capacitor C1 in the load cell B1 is connected with the load cell 1, and an analog-to the load cell B1, the 12 pin of the analog-to-digital conversion U8 chip is grounded, the first end of the 14 pin of the analog-to-digital conversion U8 chip is connected with a 3.3V power supply, the second end of the 4 pin of the analog-to-digital conversion U8 chip is grounded through a capacitor C3, the third end of the 4 pin of the analog-to-digital conversion U8 chip is grounded through a capacitor C4, one end of the 15 pin of the analog-to-digital conversion U8 chip is connected with the 3 pin of the resistor R1, the other end of the 15 pin of the analog-to-digital conversion U8 chip is connected with one end of a resistor R7, and the 16 pin of the analog-to-digital conversion U8 chip is connected with the 3 pin of the resistor RP 1; the 5V voltage is electrically connected with the input end of the voltage reference U5 chip, the other end of the input end of the voltage reference U5 chip is grounded through a capacitor C33, the output end of the voltage reference U5 chip outputs 3.3V voltage, and the output end of the voltage reference U5 chip is grounded through a capacitor C9 and a capacitor C5 which are connected in parallel; the ground terminal of the voltage reference U5 chip is grounded; the output end of the voltage reference U5 chip is connected with a 13 pin of an analog-to-digital conversion U8 chip; as shown in fig. 37-38, the power conversion circuit includes a buck regulator U1 chip, a voltage regulator U4 chip, a P2 interface, and a voltage regulator Q1 chip; the voltage reducing regulator U1 chip is LMR14206 XMK/NOPB; the voltage regulator U4 chip is TPS7A4700 RGWR; the voltage regulator Q1 chip is XC6206P332 MR; a pin 1 of a buck regulator U1 chip is connected with a first end of a capacitor C1, a second end of a capacitor C1 is connected with a pin 6 of the buck regulator U1 chip, a second end of the capacitor C1 is grounded through a diode D1, a second end of a capacitor C1 is connected with one end of an inductor L1, the other end of a resistor R3 is connected with a pin 3 of a buck regulator U1 chip and one end of a resistor R5, the other end of the resistor R5 is grounded, the other end of the capacitor C13 is grounded and one end of a capacitor C19, and the other end of the inductor L1 outputs 7V voltage; the other end of the inductor L1 is connected with the capacitor C13 and the capacitor C19 which are connected in parallel and then grounded; the other end of the inductor L1 is connected with one end of the inductor L2, the other end of the inductor L2 is grounded after passing through the capacitor C16, and the other end of the inductor L2 stably outputs 7V voltage; one end of a 2 pin of a buck regulator U1 chip is grounded, the other end of the 2 pin of the buck regulator U1 chip is connected with one end of a capacitor C2, a4 pin of the buck regulator U1 chip is connected with a 5 pin of a buck regulator U1 chip, one end of a 5 pin of a buck regulator U1 chip is connected with a power supply, and the other end of the 5 pin of the buck regulator U1 chip is connected with the other end of a capacitor C2; the stably output 7V voltage is connected with pins 13, 15 and 16 of a voltage regulator U4 chip; pins 2, 7, 17, 18, 19 and 21 of the voltage regulator U4 chip are grounded in a merged mode, and pins 8 and 10 of the voltage regulator U4 chip are grounded in a merged mode; the 14 pin of the voltage regulator U4 chip is grounded through a capacitor C6; after being combined, a pin 1, a pin 20 and a pin 3 of a voltage regulator U4 chip are grounded through a capacitor C17 and a capacitor C15 which are connected in parallel, the voltage of AVDD5V is output and then is connected with one end of a filter LC1, the other end of the filter LC1 outputs DVDD5V voltage and is connected with an input end Vin of a voltage regulator Q1 chip, the other end of the filter LC1 is grounded through a capacitor C11, and the third end of the filter LC1 is grounded; the output end of the voltage regulator Q1 chip outputs DP3.3V voltage, and is grounded through a capacitor C14; the grounding end of the voltage regulator Q1 chip is grounded; the 4 pins of the P2 interface are respectively connected with one end of a diode D4 and one end of a capacitor C18, the 5 pins of the P2 interface are respectively connected with the other end of a diode D4 and the other end of a capacitor C18, one end of a capacitor C18 is connected with one end of a capacitor C2, and the other end of the capacitor C18 is connected with the other end of a capacitor C2; 2 pipe legs and 3 pipe legs of the P2 interface are connected with the weighing interface circuit; as shown in fig. 39, the weighing interface circuit includes a CAN transceiver U2 chip, and 1 pin and 4 pins of the CAN transceiver U2 chip are connected to the weighing control module; the 2 pin of the CAN transceiver U2 chip is grounded, the 3 pin of the CAN transceiver U2 chip is grounded through a capacitor C10 and a capacitor C8 which are connected in parallel, the 3 pin of the CAN transceiver U2 chip is simultaneously connected with the voltage of DVDD5V, the 5 pin of the CAN transceiver U2 chip is connected through a capacitor C7, and the 8 pin of the CAN transceiver U2 chip is grounded through a resistor R6; the 6 pin and the 7 pin of the CAN transceiver U2 chip are respectively connected with the 2 pin and the 1 pin of the electrostatic protection diode D2, and the 3 pin of the electrostatic protection diode D2 is grounded; the 6 pin and the 7 pin of the CAN transceiver U2 chip are also respectively connected with the 2 tube leg and the 3 tube leg of the P2 interface; the 1 tube leg of the P2 interface is grounded through a capacitor C12 and a resistor R8 which are connected in parallel; as shown in FIG. 40, the weigh control module includes a weigh microcontroller U7 chip and a reset U3 chip; the weighing microcontroller U7 chip is LPC11C14FBD 48/301; the reset U3 chip is ADM809SARTZ, and a DP3.3V power supply supplies power to 4 tube legs of the weighing microcontroller U7 chip through R20; DP3.3V Power supply supplies power to the 14 legs of the weighing microcontroller U7 chip through R10; one end of a 6 pin of a weighing microcontroller U7 chip is connected with a3 pin of a crystal oscillator Y2, the other end of the 6 pin of the weighing microcontroller U7 chip is connected with one end of a capacitor C38, the other end of the capacitor C38 is grounded, one end of a 7 pin of a weighing microcontroller U7 chip is connected with a1 pin of a crystal oscillator Y2, the other end of the 7 pin of the weighing microcontroller U7 chip is connected with one end of a capacitor C41, and the other end of the capacitor C41 is grounded; DP3.3V power supply supplies power for 8 pins and 44 pins of the weighing microcontroller U7 chip; the 8 pin of the weighing microcontroller U7 chip is connected with the 44 pin of the weighing microcontroller U7 chip and is grounded through a capacitor C28 and a capacitor C29 which are connected in parallel, the 12 pin of the weighing microcontroller U7 chip is connected with one end of a light-emitting diode D6, the other end of the light-emitting diode D6 is connected with a DP3.3V power supply through a resistor R18, and the 13 pin of the weighing microcontroller U7 chip is connected with the 8 pin of the CAN transceiver U2 chip; a 19 pin of a weighing microcontroller U7 chip is connected with a4 pin of a CAN transceiver U2 chip, a 20 pin of a weighing microcontroller U7 chip is connected with a1 pin of a CAN transceiver U2 chip, a 26 pin of a weighing microcontroller U7 chip is connected with a3 pin of an analog-to-digital conversion U8 chip, a 27 pin of a weighing microcontroller U7 chip is connected with a 15 pin of an analog-to-digital conversion U8 chip, a 28 pin of a weighing microcontroller U7 chip is connected with a 16 pin of an analog-to-digital conversion U8 chip, a 31 pin of a weighing microcontroller U7 chip is connected with a1 pin of an analog-to-digital conversion U8 chip through a resistor R1, a32 pin of a weighing microcontroller U7 chip is connected with a 15 pin of an analog-to-digital conversion U8 chip through a resistor R7, a 2 pin of a reset U3 chip is connected with a3 pin of a weighing microcontroller U7 chip, a1 pin of a reset U3 chip is grounded, a1 pin of a reset U3 chip is also connected with a reset U582 pin of a reset resistor U3 chip through a resistor R2, the 3 pin of the reset U3 chip is connected with a DP3.3V power supply; the data transceiving end of the CAN transceiver U2 chip is connected with the CAN interface of the main controller through a CAN bus;

as shown in fig. 41-52, the power supply unit includes a power conversion circuit, an indicator light module, a control circuit, a fan module, a battery pack interface, a current detection circuit, and a key on/off detection module, wherein the power conversion circuit supplies power to the indicator light module, the fan module, the battery pack interface, the current detection circuit, and the key on/off detection module; the indicating lamp module, the fan module, the battery pack interface, the current detection circuit and the key switch machine detection module are respectively connected with the control circuit; as shown in fig. 40-41, the power conversion circuit includes a battery monitoring control circuit and a low voltage conversion circuit, the battery monitoring control circuit includes a battery P4 interface, a battery charging P1 interface, a power switching U1 chip, a photocoupler U8 and a voltage conversion U2 chip; the low-voltage conversion circuit comprises a voltage conversion U9 chip, a voltage regulation VR2 chip and an output control U6 chip; the interface of the battery P4 is XT60 PW-M-2P; the battery charging P1 interface is MR30 PW-F-3P; the power switching U1 chip is LTC4412ES6# PBF; the photoelectric coupler U8 is TLP 181; the voltage conversion U2 chip is TPS7B 6933; the voltage conversion U9 chip is LMR14206 XMK/NOPB; the output control U6 chip is a TLP 181; the 1 pin of the battery P4 interface is grounded, the 2 pin of the battery P4 interface provides 24V power, the second end of the 2 pin of the battery P4 interface is connected with the D pole of a field effect transistor Q13, the first end of the S pole of the field effect transistor Q13 is connected with one end of a capacitor C33, the second end of the S pole of a field effect transistor Q13 is connected with the 1 pin of a battery charging P1 interface and is connected with a charging power supply 24V, the other end of the capacitor C33 is connected with the 2 pin of a battery charging P1 interface and is grounded, the first end of the G pole of a field effect transistor Q13 is connected with the D pole of a field effect transistor Q13 through a resistor R2, the second end of the G pole of a field effect transistor Q13 is connected with one end of a resistor R5, the other end of a resistor R5 is connected with the C collector of a triode Q4, the E collector of a triode Q4 is grounded and is connected with the B collector of a triode Q4 through a resistor, and the first end of the B collector of a triode Q4 is grounded through a capacitor C35; the first end of the B collector of the triode Q4 is connected with the control circuit through a resistor R45; the power supply switching U1 chip is grounded after the 2 pin and the 3 pin are combined, the first end of the 1 pin of the power supply switching U1 chip is connected with an input battery 21V and is grounded through a capacitor C34, the 1 pin of the power supply switching U1 chip is connected with the S pole of a field effect transistor Q12, the 5 pin of the power supply switching U1 chip is connected with the G pole of a field effect transistor Q12, the 6 pin of the power supply switching U1 chip is connected with the D pole of a field effect transistor Q12, the D pole of the field effect transistor Q12 is grounded through a capacitor C32, the D pole of a field effect transistor Q12 is connected with one end of a fuse F1, the other end of the fuse F1 is connected with one end of a resistor R36, the other end of a resistor R36 is connected with one end of a power supply voltage 24V and a fuse F2 respectively, and the two ends of a resistor R36 are connected with the two ends of a capacitor C44 through a resistor R48 and a resistor R50 respectively and connected with a current detection circuit; the 4 pins of the power supply switching U1 chip are connected with the control circuit, and the 4 pins of the power supply switching U1 chip are connected with the power supply voltage of 3.3V through a resistor R1; a1 pin of a photoelectric coupler U8 is connected with the working voltage of 3.3V, a3 pin of the photoelectric coupler U8 is grounded, a4 pin of a photoelectric coupler U8 is connected with one end of a resistor R18, the other end of the resistor R18 is connected with a G pole of a field-effect tube Q3, one end of an S pole of a field-effect tube Q3 is connected with the G pole of the field-effect tube Q3 through a resistor R44, the other end of the S pole of a field-effect tube Q3 is connected with the other end of a fuse F2, a D pole of the field-effect tube Q3 is connected with one end of the resistor R14, and the other end of the resistor R14 outputs 24V voltage; two ends of the resistor R14 are respectively connected with two ends of the capacitor C7 through a resistor R15 and a resistor R16 and are connected with the current detection circuit; the ground terminal of the voltage conversion U2 chip is grounded, and is connected with the output terminal of the voltage conversion U2 chip through one end of a capacitor C3, the ground terminal of the voltage conversion U2 chip is also connected with one end of the voltage output terminal of the voltage conversion U2 chip through a capacitor C1 and a capacitor C4, the other end of the capacitor C3 is connected with an input voltage of 3.3V, one end of the capacitor C4 is connected with a system power supply 24V and is grounded through a diode D6, and one end of the diode D6 is connected with the third end of the 2-pin of the battery P4 interface through a diode D9; as shown in fig. 43-44, pin 1 of the voltage conversion U9 chip is connected to pin 6 of the voltage conversion U9 chip through a capacitor C28, the capacitor C28 is grounded through a diode D1, the capacitor C28 is connected to a first end of an inductor L2, a second end of the inductor L2 is connected to pin 3 of the voltage conversion U9 chip through one end of a resistor R40, the other end of the resistor R40 is grounded through a resistor R41, the inductor L2 is grounded through a capacitor C39 and a capacitor C37 connected in parallel, the second end of the inductor L2 is connected to one end of a ferrite bead FB601, and the other end of the ferrite bead FB601 outputs VDD5V voltage; the second end of the inductor L2 is connected with the voltage input end of the voltage regulation VR2 chip; the voltage output end of the voltage regulation VR2 chip outputs VDD3.3V voltage; the voltage input end of the voltage regulation VR2 chip is grounded through a capacitor C26; the voltage output end of the voltage regulation VR2 chip is grounded through a capacitor C24; the grounding end of the voltage regulation VR2 chip is grounded; the 2 pin of the voltage conversion U9 chip is grounded, the 4 pin of the voltage conversion U9 chip is connected with the 5 pin of the voltage conversion U9 chip through a resistor R22, the 4 pin of the voltage conversion U9 chip is also connected with one end of a resistor R43, the other end of a resistor R43 is grounded, the D pole of a field effect transistor Q6 is connected with one end of the resistor R43, the S pole of a field effect transistor Q6 is connected with the other end of the resistor R43, the G pole of a field effect transistor Q6 is connected with a power supply voltage of 3.3V through the resistor R42, and the 5 pin of the voltage conversion U9 chip is grounded through a capacitor C30; the G pole of the field effect transistor Q6 is connected with the control circuit; a1 pin of the output control U6 chip is connected with a power supply voltage of 3.3V, a3 pin of the output control U6 chip is grounded, a4 pin of the output control U6 chip is connected with one end of a resistor R38, the other end of the resistor R38 is connected with a G pole of a field effect transistor Q2, a D pole of the field effect transistor Q2 is connected with one end of a fuse F3, and the other end of the fuse F3 is connected with a voltage of 24V; the D pole of the field effect transistor Q2 is connected with the 5 pin of the voltage conversion U9 chip; the resistor R38 is connected with the D pole of the field effect transistor Q2 through a resistor R34; the S pole of the field effect transistor Q2 is connected with RPI24V through a resistor R26, and two ends of the resistor R26 are respectively connected with two ends of a capacitor C27 through a resistor R35 and a resistor R37 and are connected with a current detection circuit; as shown in fig. 44, the indicator light module includes a pin connector P5 interface and a low pass filter LP 1; a pin 1 of an interface of a pin connector P5 is connected with a working voltage 5V through a ferrite bead FB2, a pin 1 of an interface of a pin connector P5 is grounded through a capacitor C9, a pin 2, a pin 3, a pin 4 and a pin 5 of the interface of the pin connector P5 are grounded through a capacitor C10, a capacitor C15, a capacitor C20 and a capacitor C22 respectively, and a pin 2, a pin 3, a pin 4 and a pin 5 of the interface of a pin connector P5 are connected with a low-pass filter LP 1; the 6 pin of the pin connector P5 interface is grounded; the battery-powered indication output end of the low-pass filter LP1 is connected with the D pole of a field-effect tube Q7 through a resistor R30, the S pole of the field-effect tube Q7 is grounded, the G pole of the field-effect tube Q7 is connected with a control circuit, the charging indication end of the low-pass filter LP1 is connected with the D pole of the field-effect tube Q9 through a resistor R29, the S pole of the field-effect tube Q9 is grounded, the G pole of the field-effect tube Q9 is connected with the control circuit, the power indication end of the low-pass filter LP1 is connected with the D pole of the field-effect tube Q5 through a resistor R28, the S pole of the field-effect tube Q5 is grounded, the G pole of the field-effect tube Q5 is connected with the control circuit, and the main power switch indication end of the low-pass filter LP1 is connected with the control circuit. 46-48, the control circuit includes a microcontroller U7 chip, a CAN transceiver U5 chip, and a monitor U3 chip; the chip of the microcontroller U7 is LPC1549JBD 48; the chip of the CAN transceiver U5 is TJA 1051T/3; the monitor U3 chip is CAT809STBI-GT3, the 1 pin of the microcontroller U7 chip is connected with the G pole of a field effect transistor Q6 in the low voltage conversion circuit, the 2 pin of the microcontroller U7 chip is connected with the 2 pin of a photoelectric coupler U8 through a resistor R51 in the battery monitoring control circuit, the 3 pin of the microcontroller U7 chip is connected with the 2 pin of an output control U6 chip in the low voltage conversion circuit through a resistor R24, the 4 pin of the microcontroller U7 chip is grounded through a resistor R21, the 4 pin of the microcontroller U7 chip is connected with the G pole of a field effect transistor Q14, the S pole of the field effect transistor Q14 is grounded, the D pole of the field effect transistor Q14 is connected with the 2 pin of a buzzer LS1, the D pole of the field effect transistor Q14 is connected with a diode D14 through a resistor R20, a diode D14 is connected with the 1 pin of the buzzer LS1, and the VDD V is connected with the LS 862 pin of the buzzer 1; a pin 5 of a microcontroller U7 chip is in voltage connection with DP3.3V through a resistor R8, a pin 18 of the microcontroller U7 chip is in voltage connection with VDD3.3V through a light emitting diode D8 and a resistor R49, a pin 19 of the microcontroller U7 chip is in voltage connection with VDD3.3V through a light emitting diode D5 and a resistor R31, a pin 25 of the microcontroller U7 chip is connected with a pin 3 of a crystal oscillator Y2, a pin 26 of the microcontroller U7 chip is connected with a pin 1 of the crystal oscillator Y2, a pin 2 of the crystal oscillator Y2 is respectively connected with a pin 3 and a pin 1 of the crystal oscillator Y2 through a capacitor C41 and a capacitor C42 and is grounded, a pin 47 of the microcontroller U7 chip is connected with a pin B collector of a triode Q4 through a resistor R45 of a battery monitoring control circuit, and a pin 48 of the microcontroller U7 chip is connected with a pin 4 of a power supply U1 of the battery monitoring control circuit; the 30 pin of the microcontroller U7 chip is connected with DP3.3V voltage, and the 10 pin, the 14 pin, the 16 pin, the 27 pin, the 39 pin and the 42 pin of the microcontroller U7 chip are connected and then connected with DP3.3V voltage; pins 11, 17, 20, 40 and 41 of the microcontroller U7 chip are grounded after being connected; a1 pin of a CAN transceiver U5 chip is connected with a 7 pin of a microcontroller U7 chip, a 2 pin of a CAN transceiver U5 chip is grounded, a3 pin of the CAN transceiver U5 chip is grounded through a capacitor C18 and a capacitor C23 respectively, a3 pin of a CAN transceiver U5 chip is also connected with VDD5V voltage, a4 pin of the CAN transceiver U5 chip is connected with a 6 pin of a microcontroller U7 chip, a 5 pin of the CAN transceiver U5 chip is connected with VDD3.3V voltage, a 5 pin of the CAN transceiver U5 chip is grounded through a capacitor C17, a 6 pin and a 7 pin of the CAN transceiver U5 chip are combined through a resistor R11 and a resistor 12 respectively and are grounded through a capacitor C19 after being combined, an 8 pin of the CAN transceiver U5 chip is grounded through a resistor R32, and a microcontroller U5 chip is connected with a 9 pin of a microcontroller U7 chip; one end of a1 pin of the monitor U3 chip is grounded and is also connected with a 2 pin of the monitor U3 chip through a resistor R3, the 2 pin of the monitor U3 chip is connected with a 34 pin of the microcontroller U7 chip, and a3 pin conversion joint of the monitor U3 chip is connected and has the voltage of 3.3V; the 12 pins of the microcontroller U7 chip are connected with the G pole of a field effect transistor Q7 in the indicator light module; a 15 pin of the microcontroller U7 chip is connected with a G pole of a field effect transistor Q5 in the indicator light module; the 13 pins of the microcontroller U7 chip are connected with the G pole of a field effect transistor Q9 in the indicator light module; pins 21 and 28 of the microcontroller U7 chip are connected with the key on-off module; the 24 pins of the microcontroller U7 chip are connected with DP3.3V voltage through a resistor R27; pins 37, 38, 43, 44, 45 and 46 of the microcontroller U7 chip are connected with a battery pack interface; as shown in fig. 49, the fan module includes a speed sensor P3 interface; the 1 pin of the P3 interface of the speed sensor is grounded, the 3 pin of the P3 interface of the speed sensor is connected with one end of a fuse F4, the other end of the fuse F4 is connected with an RPI24V, the 2 pin of the P3 interface of the speed sensor is connected with the first end of a triode D4, the second end of the triode D4 is powered by resistors R23 and VDD3.3V, the second end of the triode D4 is grounded by a triode D2, and the second end of the triode D4 is connected with the 8 pin of a microcontroller U7 chip by a resistor R25; as shown in fig. 50, the battery pack interface includes a P2 interface; the 1 pin of the P2 interface is grounded, the 2 pin of the P2 interface is connected with the working voltage of 3.3V, the 2 pin of the P2 interface is also grounded through a capacitor C36, the 3 pin interface of the P2 is connected with the 43 pin of a microcontroller U7 chip, the 3 pin of the P2 interface is grounded through a capacitor C40, and the 3 pin of the P2 interface is connected with the voltage of VDD3.3V through a light-emitting diode D12 and a resistor R47; the 4 pins of the P2 interface are connected with the 44 pins of the microcontroller U7 chip, the 4 pins of the P2 interface are grounded through a capacitor C38, and the 4 pins of the P2 interface are connected with VDD3.3V voltage through a light-emitting diode D11 and a resistor R6; the 5 pin of the P2 interface is connected with the 45 pin of the microcontroller U7 chip, the 5 pin of the P2 interface is grounded through a capacitor C29, the 5 pin of the P2 interface is connected with VDD3.3V voltage through a resistor R7, and the 5 pin of the P2 interface is grounded through a resistor R9; the 6 pin of the P2 interface is connected with the 37 pin of the microcontroller U7 chip, and the 6 pin of the P2 interface is grounded through an electrostatic protection diode D13; the 7 pin of the P2 interface is connected with the 38 pin of the microcontroller U7 chip, and the 7 pin of the P2 interface is grounded through an electrostatic protection diode D7; the 8 pin of the P2 interface is connected with the 46 pin of the microcontroller U7 chip, the 8 pin of the P2 interface is connected with VDD3.3V voltage through a resistor R19, and the 8 pin of the P2 interface is grounded through a capacitor C31; 8 pins of the P2 interface are connected with 8 pins of an RP1 exclusion in the battery charging module, 7 pins of the P2 interface are connected with 6 pins of an RP1 exclusion in the battery charging module, and 6 pins of the P2 interface are connected with 5 pins of an RP1 exclusion in the battery charging module; as shown in fig. 51, the current detection circuit includes a current detection U4 chip; the current detection U4 chip is INA 3221; the 1 pin and the 2 pin of the current detection U4 chip are respectively connected with a resistor R37 and a resistor R35 of the low-voltage conversion circuit; the 3 pin, the 0 pin and the 5 pin of the current detection U4 chip are grounded, and the 4 pin of the current detection U4 chip is connected through a capacitor C6; a 6 pin of the current detection U4 chip is connected with a 37 pin of the microcontroller U7 chip, a 7 pin of the current detection U4 chip is connected with a 38 pin of the microcontroller U7 chip, the 6 pin and the 7 pin of the current detection U4 chip are respectively connected with the working voltage of 3.3V through a resistor R39 and a resistor R33, and a 11 pin and a 12 pin of the current detection U4 chip are respectively connected with a resistor R48 and a resistor R50 of the battery monitoring control circuit; the 14 pin and the 15 pin of the current detection U4 chip are respectively connected with a resistor R15 and a resistor R16 of the battery monitoring control circuit; as shown in fig. 52, the key switch module includes a fet group Q10; pin 1 of fet group Q10 is grounded through resistor R4, pin 1 of fet group Q10 is also connected to pin 21 of the microcontroller U7 chip, pin 2 of fet group Q10 is connected to VCC3.3V in voltage, pin 2 of fet group Q10 is connected to one end of resistor R17, the other end of resistor R17 is connected to one end of triode D3, the other end of triode D3 is connected to the main power switch, pin 3 of fet group Q10 is connected to the other end of resistor R17, pin 4 of fet group Q10 is connected to DP3.3V power supply, pin 4 of fet group Q10 is grounded through capacitor C43, pin 4 of fet group Q10 is also connected to a first end of resistor R10, the second end of resistor R10 is grounded through capacitor C8, the second end of resistor R10 is connected to pin 28 of the microcontroller U10 chip, the second end of resistor R10 is also connected to the other end of diode D10, the 5 pin of the field effect tube group Q10 is grounded, and the 6 pin of the field effect tube group Q10 is grounded through a capacitor C25 after being connected with the 3 pin of the field effect tube group Q10; and the data transceiving end of the CAN transceiver U5 chip is connected with a CAN interface of the main controller.

The working principle is as follows: occlusion and air detection unit: the switch voltage-stabilizing chip U1 converts the 24V power input into 7V, the forward low-voltage-drop voltage stabilizer U3 converts the 24V power input into 5V, and the low-voltage-drop voltage stabilizer U13 converts the 24V power input into 3.3V; the field effect transistor Q1, the field effect transistor Q2 and the 6-pin connector P1 are connected with the blood leakage detector; the vein clamp module and the heating module are standby modules; the blockage detection module is independently powered by a precision voltage stabilizer U6 and is connected with the blockage detector; the air detection module is connected with the air detector; the microcontroller U4 reads and preprocesses the data of the jam detector and the air detector, and then sends the data to the transceiver U2, and the transceiver U2 sends the data to the main controller

The single board computer expansion unit: the step-down voltage stabilizer U1 in the main power supply module converts the 24V power supply input into 6.6V, and the fixed voltage regulator U2 converts the 24V power supply input into 5V, so as to supply power to the whole single board computer extension unit; the voltage stabilizer U11 converts a 5V power supply into 3.3V, and the step-down voltage stabilizer U21 converts the 5V power supply into 12V, so that power is supplied to the display screen driving module and the backlight adjusting interface module; the video signal conversion chip U4 part is a display screen drive circuit; the real-time clock chip U15 part is a real-time clock circuit; the microcontroller U10 reads the data of the whole single board computer expansion unit and sends the data to the main controller through the CAN data transceiver U7;

battery charging and protection unit: the battery charging module is used for charging the battery and measuring charging current, discharging current, battery voltage and battery electric quantity at the same time; the battery protection module is used for performing charging and discharging overcurrent protection, over-temperature protection, short circuit protection and battery overcharge and over-discharge protection on the battery pack;

a motor drive unit: the motor driving unit is used for driving the peristaltic pump, a voltage stabilizer U5 chip converts a 24V power supply into 5V, and a low-dropout voltage stabilizer U6 chip converts the 24V power supply into 3.3V; the position sensor U3 chip part circuit is used for detecting the rotating speed of the peristaltic pump motor; the R12 resistor, the R13 resistor, the R14 resistor and the C21 capacitor are used for detecting the power supply voltage; the circuit of the U1 chip is a driving circuit of the motor; the micro-detector U7 chip is responsible for controlling the stop, rotation and rotation speed of the motor and reading the driving parameters, and is sent to the main controller through the interface integrated U4 chip;

a weighing unit: the voltage regulator U1 chip converts a 24V power supply into 7V, and the voltage regulator U4 chip and the voltage regulator Q1 chip part convert the 24V power supply into 5V and 3.3V; the analog-to-digital conversion U8 chip part is an analog-to-digital conversion circuit and processes the weighing data; the weighing microcontroller U7 chip reads weighing data from the analog-to-digital conversion U8 chip for digital filtering processing and sends the data to the main controller through the CAN transceiver U2 chip part;

a power supply unit: the voltage conversion U2 part converts a 24V power supply into 3.3V, and the voltage conversion U9 chip converts the 24V power supply into 5V; the partial circuit of the field effect transistor Q6 is used for controlling a 5V power switch; the field effect transistor Q2 and the output control U6 chip part control whether the power supply of the main controller is output; the field effect transistor Q3 and the optical coupler U8 control whether the system power supply outputs; the three-stage transistor Q4 and the field effect transistor Q13 are a control circuit with the function of charging the battery; the field effect transistor Q5, the field effect transistor Q7 and the field effect transistor Q9 are indicator lamp control circuits; the current detection U4 chip is used for detecting the main controller current, the bus current and the total current; the microcontroller U7 chip is responsible for detection of keys, control of status indicator lamps, reading and calculation of power supply and battery parameters and sends the parameters to the main controller through the CAN transceiver U5 chip.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.

Claims

1. The control circuit of the balance system for the chemotherapy liquid inlet and outlet is characterized by comprising a main controller, a blockage and air detection unit, a single-board computer expansion unit, a battery charging and protection unit, a motor driving unit, a weighing unit and a power supply unit, wherein the blockage and air detection unit, the single-board computer expansion unit, the motor driving unit, the weighing unit and the power supply unit are all connected with the main controller, and the battery charging and protection unit is connected with the power supply unit.

2. The hydration treatment inlet and outlet liquid balance system control circuit of claim 1, wherein the main controller is of the type element14 BeagleBone Black; the blockage and air detection unit comprises a micro control module, a blood leakage detection module, an air detection module, a blockage detection module and a power supply module, wherein the output end of the power supply module is connected with the input end of the micro control module, and the blood leakage detection module, the air detection module and the blockage detection module are respectively connected with the micro control module; the micro-control module comprises a microcontroller U4, the model of the microcontroller U4 is LPC1549JBD48, a pin 5 of the microcontroller U4 is connected with a resistor R5, and the other end of the resistor R5 is input with DP3V 3; the microcontroller U4 is connected with a 4-pin connector P2, a pin 1 of the 4-pin connector P2 is grounded, a pin 2 of the 4-pin connector P2 is connected with a pin 23 of the microcontroller U4, a pin 3 of the 4-pin connector P2 is connected with a pin 22 of the microcontroller U4, and a pin 4 of the 4-pin connector P2 is input with DP3V 3; a pin 24 of the microcontroller U4 is connected with a resistor R6, a pin 37 of the microcontroller U4 is connected with a resistor R2, a pin 38 of the microcontroller U4 is connected with a resistor R5, and output ends of the resistor R6, the resistor R2 and the resistor R5 are connected with each other and input into DP3V 3; a pin 25 of the microcontroller U4 is connected with a capacitor C13, a pin 26 of the microcontroller U4 is connected with a capacitor C21, a three-pin crystal oscillator Y1 is connected between the pin 25 and the pin 26 of the microcontroller U4, a pin 1 of the three-pin crystal oscillator Y1 is connected with a pin 26 of the microcontroller U4, a pin 3 of the three-pin crystal oscillator Y1 is connected with a pin 25 of the microcontroller U4, and a pin 2 of the three-pin crystal oscillator Y1 is connected with an output end of the capacitor C13 and an output end of the capacitor C21 and is grounded; a 4-pin connector P33 is connected to the microcontroller U4, a DP3V3 is input at a pin 1 of the 4-pin connector P33, a DP 33 of the microcontroller U4 is connected to a pin 2 of the 4-pin connector P33, a pin 3 of the 4-pin connector P33 is connected to a pin 29 of the microcontroller U4, and a pin 4 of the 4-pin connector P33 is grounded; the pin 17 and the pin 11 of the microcontroller U4 are connected with each other and grounded, and the pin 20, the pin 40 and the pin 41 of the microcontroller U4 are connected with each other and grounded; pin 30 of the microcontroller U4 inputs DP3V3, pin 16, pin 14 and pin 10 of the microcontroller U4 are connected to each other and input into NTC3V 3; pin 27, pin 14 and pin 39 of the microcontroller U4 are connected to each other and input DP3V 3; a pin 28 of the microcontroller U4 is connected with a green light emitting diode D3, a cathode of the green light emitting diode D3 is connected with the pin 28 of the microcontroller U4, an anode of the green light emitting diode D3 is connected with a resistor R1, and the other end of the resistor is input with DP3V 3; a pin 34 of the microcontroller U4 is connected with a power supply monitoring module, the power supply monitoring module comprises a power supply management chip U5, the model of the power supply management chip U5 is CAT809STBI-GT3, a pin 2 of the power supply management chip U5 is connected with the pin 34 of the microcontroller U4, a pin 2 of the power supply management chip U5 is connected with a resistor R9, the other end of the resistor R9 is connected with a pin 1 of the power supply management chip U5 and grounded, and a pin 3 of the power supply management chip U5 is input with DP3V 3; the power supply input end of the microcontroller U4 is electrically connected with the output end of the power supply module; the microcontroller U4 is connected with a blood leakage detector connection interface module, the blood leakage detector connection interface module comprises a 4-pin connector LEAK, a ferrite bead FB9, a resistor R24, a resistor R23, a resistor R22 and a resistor R21, and a pin 1 of the 4-pin connector LEAK is grounded; pin 2 of the 4-pin connector LEAK is connected with a first end of a resistor R24, and a second end of the resistor R24 is connected with pin 3 of the microcontroller U4; pin 3 of the 4-pin connector LEAK is connected with a first end of the resistor R23, and a second end of the resistor R23 is connected with pin 4 of the microcontroller U4; a pin 4 of the 4-pin connector LEAK is connected with a first end of the ferrite bead FB9, a second end of the ferrite bead FB9 is input with VCC5V, a first end of the ferrite bead FB9 is connected with a capacitor C7, and a second end of the capacitor C7 is grounded; a first end of the resistor R21 is connected with pin 3 of the 4-pin connector LEAK, a first end of the resistor R22 is connected with pin 2 of the 4-pin connector LEAK, a second end of the resistor R21 is connected with a second end of the resistor R22 and is input with DP3V 3; a first end of the resistor R21 is connected with a capacitor C42, a first end of the resistor R22 is connected with a capacitor C43, and a second end of the capacitor C42 and a second end of the capacitor C43 are connected with each other and grounded; the microcontroller U4 is connected with a heating module, the heating module comprises a 4-pin connector HEATER, a resistor R26, a resistor R27 and an ferrite bead FB5, and a pin 1 of the 4-pin connector HEATER is grounded; pin 2 of the 4-pin connector heat is connected with a first end of the resistor R27, and a second end of the resistor R27 is connected with pin 45 of the microcontroller U4; pin 3 of the 4-pin connector heat is connected with a first end of the resistor R26, and a second end of the resistor R26 is connected with pin 46 of the microcontroller U4; a pin 4 of the 4-pin connector heat is connected with a first end of the ferrite bead FB5, a second end of the ferrite bead FB5 is inputted with DP3V3, a first end of the ferrite bead FB5 is connected with a capacitor C27, and a second end of the capacitor C27 is grounded; a first end of the resistor R26 is connected with a capacitor C30, a first end of the resistor R27 is connected with a capacitor C28, and second ends of the capacitor C30 and the capacitor C28 are connected with each other and grounded; a vein clip module is connected to the microcontroller U4, the vein clip module including a 4-pin connector CLAMP1, a 4-pin connector CLAMP2, and a 4-pin connector CLAMP 3; the resistor R4 is connected to pin 2 of the 4-pin connector CLAMP1, and the second end of the resistor R4 is connected with pin 15 of the microcontroller U4; the resistor R3 is connected to pin 3 of the 4-pin connector CLAMP1, and the second end of the resistor R3 is connected with pin 24 of the microcontroller U4; a capacitor C20 is connected to pin 3 of the 4-pin connector CLAMP1, a capacitor C23 is connected to pin 2 of the 4-pin connector CLAMP1, and second ends of the capacitor C20 and the capacitor C23 are connected with each other, connected with pin 1 of the 4-pin connector CLAMP1 and then grounded; the resistor R28 is connected to pin 2 of the 4-pin connector CLAMP2, and the second end of the resistor R28 is connected with pin 12 of the microcontroller U4; the resistor R25 is connected to pin 3 of the 4-pin connector CLAMP2, and the second end of the resistor R25 is connected with pin 13 of the microcontroller U4; a capacitor C26 is connected to pin 3 of the 4-pin connector CLAMP2, a capacitor C29 is connected to pin 2 of the 4-pin connector CLAMP2, and second ends of the capacitor C26 and the capacitor C29 are connected with each other, connected with pin 1 of the 4-pin connector CLAMP2 and then grounded; the resistor R30 is connected to pin 2 of the 4-pin connector CLAMP3, and the second end of the resistor R30 is connected with pin 8 of the microcontroller U4; the resistor R29 is connected to pin 3 of the 4-pin connector CLAMP3, and the second end of the resistor R29 is connected with pin 9 of the microcontroller U4; a capacitor C32 is connected to pin 3 of the 4-pin connector CLAMP3, a capacitor C35 is connected to pin 2 of the 4-pin connector CLAMP3, and second ends of the capacitor C32 and the capacitor C35 are connected with each other, connected with pin 1 of the 4-pin connector CLAMP3 and then grounded; the power supply module comprises a switching voltage stabilizing chip U1, a forward low dropout regulator U3 and a forward low dropout regulator U13, wherein the model of the switching voltage stabilizing chip U1 is LMR14206, the model of the forward low dropout regulator U3 is AMS1117-5.0, and the model of the forward low dropout regulator U13 is AMS 1117-3.3; a pin 5 of the switch voltage stabilization chip U1 is connected with a pin 4 of a switch voltage stabilization chip U1, the pin 5 of the switch voltage stabilization chip U1 is connected with a capacitor C14 and is connected with 24V direct current, and the other end of the capacitor C14 is connected with a pin 2 of the switch voltage stabilization chip U1 and is grounded; pin 1 of the switching regulator chip U1 is connected with a capacitor C9, pin 6 of the switching regulator chip U1 is connected with the output end of the capacitor C9, the output end of the capacitor C9 is connected with a diode D4, the cathode of the diode D4 is connected with the output end of the capacitor C9, the anode of the diode D4 is grounded, the anode of the diode D4 is connected with an inductor L3, the second end of the inductor L3 is connected with a resistor R8, the output end of the resistor R8 is connected with pin 3 of the switching regulator chip U1, pin 3 of the switching regulator chip U1 is connected with a resistor R11, the other end of the resistor R11 is grounded, the second end of the inductor L3 outputs VCC7V, the second end of the inductor L3 is connected with a pole capacitor C15, the anode of the pole capacitor C15 is connected with the second end of the inductor L3, and the cathode of the pole capacitor C15 is grounded; the anode of the polar capacitor C15 is connected with the Vin pin of the forward low dropout regulator U3, the GND pin of the forward low dropout regulator U3 is grounded, two Out pins of the forward low dropout regulator U3 are connected with each other to output VCC5V and connected with a capacitor C16, and the second end of the capacitor C16 is grounded; an Out pin of the forward low dropout regulator U3 is connected with a Vin pin of the forward low dropout regulator U13, a GND pin of the forward low dropout regulator U13 is grounded, two Out pins of the forward low dropout regulator U13 are connected with each other to output DP3V3 and are connected with a capacitor C17, and a second end of the capacitor C17 is grounded; the DP3V3 output end of the forward low dropout regulator U13 is connected with the DP3V3 input end of the microcontroller U4, and the output end of the forward low dropout regulator U3 is connected with the input end of the CAN bus data transceiver module; the CAN bus data transceiving module comprises a transceiver U2 and an ESD electrostatic protection diode D1, and the model of the transceiver U2 is TJA 1051T/3; pin 7 of the transceiver U2 is connected with a high-order data line of a CAN bus, pin 6 of the transceiver U2 is connected with a bottom-order data line of the CAN bus, the high-order data line is connected with pin 1 of an ESD electrostatic protection diode D1, the low-order data line is connected with pin 2 of an ESD electrostatic protection diode D1, and pin 3 of the ESD electrostatic protection diode D1 is grounded; pin 2 of the transceiver U2 is grounded, pin 1 of the transceiver U2 is connected with pin 19 of the microcontroller U4, pin 4 of the transceiver U2 is connected with pin 21 of the microcontroller U4, pin 8 of the transceiver U2 is connected with pin 18 of the microcontroller U4, and pin 8 of the transceiver U2 is connected with a resistor R7 in series and grounded; a capacitor C10 is connected to a pin 3 of the transceiver U2, a second end of the capacitor C10 is grounded, a first end of the capacitor C10 is input with VCC5V, and two ends of the capacitor C10 are connected with a capacitor C11 in parallel; a capacitor C12 is connected to a pin 5 of the transceiver U2 and simulates input or output DP3V3, and the other end of the capacitor C12 is grounded; the blood leakage detection module comprises a field effect tube Q1, a field effect tube Q2, a ferrite bead FB6, a ferrite bead FB7, a ferrite bead FB10 and a 6-pin connector P1, wherein the models of the field effect tube Q1 and the field effect tube Q2 are FDC 6420C; pin 1 of the field effect transistor Q1 is connected with pin 43 of the microcontroller U4 and connected with a resistor R39, the other end of the resistor R39 is grounded, pin 2 of the field effect transistor Q1 is connected with a resistor R40 and input VCC5V, the second end of the resistor R40 is connected with pin 3 of the field effect transistor Q1, the second end of the resistor R40 is connected with pin 6 of the field effect transistor Q1, pin 5 of the field effect transistor Q1 is grounded, pin 4 of the field effect transistor Q1 is connected with the first end of the ferrite FB6, the second end of the ferrite FB6 is connected with a capacitor C33 and connected with pin 4 of the 6-pin connector P1, and the second end of the capacitor C33 is grounded; pin 1 of the field effect transistor Q2 is connected with pin 44 of the microcontroller U4 and is connected with a resistor R41, the other end of the resistor R41 is grounded, pin 2 of the field effect transistor Q2 is connected with a resistor R42 and is input with VCC5V, the second end of the resistor R42 is connected with pin 3 of the field effect transistor Q2, the second end of the resistor R42 is connected with pin 6 of the field effect transistor Q2, pin 5 of the field effect transistor Q2 is grounded, pin 4 of the field effect transistor Q2 is connected with the first end of the ferrite FB7, the second end of the ferrite FB7 is connected with a capacitor C34 and is connected with pin 5 of the 6-pin connector P1, and the second end of the capacitor C34 is grounded; pin 1 of the 6-pin connector P1 is grounded, pin 2 of the 6-pin connector P1 is connected with a resistor R20, a second end of the resistor R20 is connected with pin 37 of the microcontroller U4, pin 3 of the 6-pin connector P1 is connected with a resistor R19, a second end of the resistor R19 is connected with pin 38 of the microcontroller U4, pin 6 of the 6-pin connector P1 is connected with a first end of the ferrite bead FB10, a second end of the ferrite bead FB10 is input with DP3V3, a first end of the ferrite bead FB10 is connected with a capacitor C22, and a second end of the capacitor C22 is grounded; the air detection module comprises a first detection circuit, a second detection circuit, a third detection circuit and a fourth detection circuit, and the first detection circuit, the second detection circuit, the third detection circuit and the fourth detection circuit are respectively connected with the microcontroller U4; the first detection circuit comprises a 3-pin connector AIR1, a ferrite bead FB1, a resistor R33, a capacitor C38 and a capacitor C39, wherein a pin 2 of the 3-pin connector AIR1 is connected with a first end of the resistor R33, a second end of the resistor R33 is connected with a pin 2 of the microcontroller U4, a second end of the resistor R33 is connected with the capacitor C24, and a second end of the capacitor C24 is grounded; a pin 3 of the 3-pin connector AIR1 is connected with a first end of the ferrite bead FB1 and is input with VCC5W, and a second end of the ferrite bead FB1 is input with VCC 5V; pin 3 of the 3-pin connector AIR1 is connected with a first end of the capacitor C38, pin 2 of the 3-pin connector AIR1 is connected with a first end of the capacitor C39, and a second end of the capacitor C38 is connected with a second end of the capacitor C39 and is connected with pin 1 of the 3-pin connector AIR1 and then grounded; the second detection circuit comprises a 3-pin connector AIR2, a ferrite bead FB2, a resistor R34, a capacitor C40 and a capacitor C41, wherein a pin 2 of the 3-pin connector AIR2 is connected with a first end of the resistor R34, a second end of the resistor R34 is connected with a pin 1 of the microcontroller U4, a second end of the resistor R34 is connected with the capacitor C25, and a second end of the capacitor C25 is grounded; the pin 3 of the 3-pin connector AIR2 is connected with a first end of the ferrite bead FB2, and a second end of the ferrite bead FB2 is input with VCC 5V; the third detection circuit comprises a 3-pin connector AIR3, a ferrite bead FB3, a resistor R35, a capacitor C48 and a capacitor C49, wherein the pin 3 of the 3-pin connector AIR2 is connected with a first end of the capacitor C40, the pin 2 of the 3-pin connector AIR2 is connected with a first end of the capacitor C41, a second end of the capacitor C40 is connected with a second end of the capacitor C41 and is grounded after being connected with the pin 1 of the 3-pin connector AIR2, the third detection circuit comprises a 3-pin connector AIR3, a ferrite bead FB3, a resistor R35, a capacitor C48 and a capacitor C49, the pin 2 of the 3-pin connector AIR2 is connected with a first end of the resistor R35, a second end of the resistor R35 is connected with the pin 48 of the microcontroller U4, a second end of the resistor R35 is connected with a capacitor C31, and a second end of the capacitor C31 is grounded; the pin 3 of the 3-pin connector AIR2 is connected with a first end of the ferrite bead FB3, and a second end of the ferrite bead FB2 is input with VCC 5V; the fourth detection circuit comprises a 3-pin connector AIR4, a ferrite bead FB4, a resistor R36, a capacitor C45 and a capacitor C44, wherein the pin 3 of the 3-pin connector AIR2 is connected with a first end of the capacitor C48, the pin 2 of the 3-pin connector AIR2 is connected with a first end of the capacitor C49, a second end of the capacitor C48 is connected with a second end of the capacitor C49 and is grounded after being connected with the pin 1 of the 3-pin connector AIR3, the fourth detection circuit comprises a 3-pin connector AIR4, a ferrite bead FB4, a resistor R36, a capacitor C45 and a capacitor C44, the pin 2 of the 3-pin connector AIR4 is connected with a first end of the resistor R36, a second end of the resistor R36 is connected with the pin 47 of the microcontroller U4, a second end of the resistor R36 is connected with a capacitor C36, and a second end of the capacitor C36 is grounded; the pin 3 of the 3-pin connector AIR4 is connected with a first end of the ferrite bead FB4, and a second end of the ferrite bead FB4 is input with VCC 5V; pin 3 of the 3-pin connector AIR4 is connected with a first end of the capacitor C45, pin 2 of the 3-pin connector AIR4 is connected with a first end of the capacitor C44, and a second end of the capacitor C45 is connected with a second end of the capacitor C44 and is connected with pin 1 of the 3-pin connector AIR4 and then grounded; the blockage detection die comprises a 3-pin connector NTC, a resistor R31, a resistor R32, a resistor R14 and a resistor R15, wherein a pin 2 of the 3-pin connector NTC is connected with a first end of the resistor R32, and a second end of the resistor R32 is connected with a pin 6 of the microcontroller U4; pin 3 of the 3-pin connector NTC is connected with a first end of the resistor R31, and a second end of the resistor R31 is connected with pin 7 of the microcontroller U4; a second end of the resistor R31 is connected with a capacitor C36, a second end of the resistor R32 is connected with a capacitor C37, and a second end of the capacitor C36 and a second end of the capacitor C37 are connected with each other, connected with a pin 1 of the 3-pin connector NTC and then grounded; a first end of the resistor R31 is connected with a first end of the resistor R14, a first end of the resistor R32 is connected with a first end of the resistor R15, a second end of the resistor R15 is connected with a second end of the resistor R14 and connected with a capacitor C18, a second end of the capacitor C18 is grounded, and NTC3V3 is input to a second end of the resistor R14; the blocking detection module further comprises a power supply circuit, the power supply circuit comprises a precision voltage stabilizer U6, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a capacitor C5, a capacitor C6, a capacitor C8 and a ferrite bead FB8, the precision voltage stabilizer U6 is NCP51460SN33T1G in model number, a Vin pin of the precision voltage stabilizer U6 is connected with a first end of the capacitor C8, a second end of the capacitor C8 is grounded, and a VCC5V is input to the first end of the capacitor C8; the Out pin of the precision voltage regulator U6 is connected with a first end of the capacitor C1 and a first end of the capacitor C2, the first end of the capacitor C2 outputs NTC3V3, and the second end of the capacitor C1 and the second end of the capacitor C2 are connected with the GND pin of the precision voltage regulator U6 and grounded; a second end of the capacitor C2 is connected to a first end of the ferrite bead FB8, a second end of the ferrite bead FB8 is connected to first ends of the capacitor C3, the capacitor C4, the capacitor C5, and the capacitor C6, and is grounded, second ends of the capacitor C3, the capacitor C4, the capacitor C5, and the capacitor C6 are connected to each other, and outputs DP3V3, and a DP3V3 end of the output of the power supply circuit is connected to an input DP3V3 end of the blocking detection module; and the data transceiving end of the transceiver U2 is connected with the CAN interface of the main controller through a CAN bus.

3. The control circuit of the hydration treatment liquid inlet and outlet balance system according to claim 2, wherein the single board computer extension unit comprises a main power supply module, a 3.3V power supply module, a 12V power supply module, a micro control module, a real-time clock module, an interface module, a resistive touch screen interface module and a display screen driving module, wherein an input end of the 3.3V power supply module and an input end of the 12V power supply module are respectively electrically connected with an output end of the main power supply module, an output end of the 3.3V power supply module is electrically connected with an input end of the micro control module, an output end of the 12V power supply module is electrically connected with an input end of the display screen driving module, and the real-time clock module, the interface module, the resistive touch screen interface module and the display screen driving module are all connected with the micro control module; the main power supply module comprises a step-down voltage regulator U1, a fixed voltage regulator U2, a USB connector J1, a resistor R36, a capacitor C311, a capacitor C322, a capacitor C33, a capacitor C34, a capacitor C35, a polar capacitor C31, an inductor L31, a diode D33 and a single-pole single-throw switch S2, wherein the model of the step-down voltage regulator U1 is TPS54560DDA, the model of the fixed voltage regulator U2 is AMS1084CM-5.0, a pin 2 of the step-down voltage regulator U1 is connected with a first end of the capacitor C34 and a first end of the capacitor C35, 24V direct current is input to the first end of the capacitor C34, and a second end of the capacitor C34 and a second end of the capacitor C35 are connected with each other and grounded; a pin 4 of the step-down voltage regulator U1 is connected with a resistor R35, and the other end of the resistor R35 is grounded; a first end of the resistor R36 is connected with pin 6 of the step-down voltage regulator U1, a second end of the resistor R36 is connected with a first end of the capacitor C311, a second end of the capacitor C311 is grounded, a first end of the resistor R36 is connected with a capacitor C310, and the other end of the capacitor C310 is connected with a second end of the capacitor C311; pin 1 of the step-down voltage regulator U1 is connected to a first terminal of the capacitor C33, and a second terminal of the capacitor C33 is connected to a first terminal of the inductor L31; pin 8 of the step-down voltage regulator U1 is connected to the second terminal of the capacitor C33, the cathode of the diode D33 is connected to pin 8 of the step-down voltage regulator U1, and the anode of the diode D33 is grounded; pin 7 and pin 9 of the step-down voltage regulator U1 are connected to each other and to ground; a capacitor C36, a capacitor C37, a capacitor C38 and a capacitor C39 are connected to a second end of the inductor L31, first ends of the capacitor C36, the capacitor C37, the capacitor C38 and the capacitor C39 are connected to a second end of an inductor L31, second ends of the capacitor C36, the capacitor C37, the capacitor C38 and the capacitor C39 are connected to each other and grounded, a first end of the capacitor C39 is connected to a resistor R32, a first end of the capacitor C39 outputs 6.6V, the other end of the resistor R32 is connected to a pin 5 of the step-down voltage regulator U1 and connected to a resistor R33, and the other end of the resistor R33 is grounded; pin 3 of the fixed voltage regulator U2 is connected to the first end of the capacitor C39, pin 1 of the fixed voltage regulator U2 is grounded, pin 2 of the fixed voltage regulator U2 is connected to the first end of the capacitor C322, the second end of the capacitor C322 is grounded, the first end of the capacitor C322 is connected to the anode of the polar capacitor C31, and the cathode of the polar capacitor C31 is connected to the second end of the capacitor C322; the anode of the polar capacitor C31 is connected to the first end of the single-pole single-throw switch S2, the second end of the single-pole single-throw switch S2 outputs 5V and is connected to a resistor R34, the other end of the resistor R34 is connected to a light emitting diode D35, the anode of the light emitting diode D35 is connected to the other end of the resistor R34, and the cathode of the light emitting diode D35 is grounded; the VBUS pin of the USB connector J1 is connected with the other end of the single-pole single-throw switch S2, the GND pin of the USB connector J1 is grounded, the SHLD pin 5 of the USB connector J1 is connected with a capacitor C312, the SHLD pin 6 of the USB connector J1 is connected with a resistor R31, the SHLD pin 5 and the SHLD pin 6 of the USB connector J1 are connected with each other, and the other end of the capacitor C312 and the other end of the resistor R31 are connected with each other and grounded; the 3.3V power supply module comprises a power socket J2, a capacitor C16, a diode D5, a common-mode inductor L3, a voltage stabilizer U11, a capacitor C12 and a capacitor C6, wherein the model of the power socket J2 is DC-044, the model of the voltage stabilizer U11 is ADM7172ACPZ-3.3-R7, the model of the common-mode inductor L3 is ACM9070-601-2P, a J2 pin 2 of the power socket is connected with a 5V output end of the main power supply module, and a pin 1 of the power socket J2 is grounded; a first end of the capacitor C16 is connected with pin 2 of the power socket J2, and a second end of the capacitor C16 is connected with pin 1 of the power socket J2; the cathode of the diode D5 is connected with the first end of the capacitor C16, and the anode of the diode D5 is connected with the second end of the capacitor C16; pin 1 of the common mode inductor L3 is connected to the cathode of the diode D5, pin 2 of the common mode inductor L3 is connected to the anode of the diode D5, pin 3 of the common mode inductor L3 is grounded, pin 4 of the common mode inductor L3 outputs 5V and is connected to a capacitor C4, and the other end of the capacitor C4 is grounded; pin 8, pin 7 and pin 5 of the voltage stabilizer U11 are connected with each other and with pin 4 of the common mode inductor L3, pin 4 of the voltage stabilizer U11 is connected with a capacitor C47, pin 6 and pin 9 of the voltage stabilizer U11 are connected with each other and with the other end of the capacitor C47, pin 6 of the voltage stabilizer U11 is grounded, pin 1, pin 2 and pin 3 of the voltage stabilizer U11 are connected with each other and with a capacitor C12, a first end of the capacitor C12 is connected with pin 1 of the voltage stabilizer U11 and pin 1 of the voltage stabilizer U11 outputs DP3V3, a second end of the capacitor C12 is grounded, a first end of the capacitor C12 is connected with a capacitor C6 and a resistor R33, the other end of the capacitor C6 is connected with a second end of the capacitor C12, the other end of the resistor R33 is connected with a light emitting diode D6, an anode of the light emitting diode D6 is connected with the other end of the resistor R33, the cathode of the light emitting diode D6 is grounded; the 12V power supply module comprises a step-down voltage regulator U21, an inductor L5, a diode D3, a resistor R1, a resistor R5, a capacitor C19 and a bidirectional transient suppression diode D4, wherein the model of the step-down voltage regulator U21 is TPS61085PWR, the model of the bidirectional transient suppression diode D4 is PLZ12C, a pin 3, a pin 7 and a pin 6 of the step-down voltage regulator U21 are all connected with a first end of the inductor L5, a second end of the inductor L5 is connected with a pin 5 of the step-down voltage regulator U21, a first end of the inductor L5 is connected with a capacitor C36 and is connected with a 5V output end of the main power supply module, a second end of the capacitor C36 is grounded, a first end of the capacitor C36 is connected with a capacitor C37, and the other end of the capacitor C37 is connected with a second end of the capacitor C36; pin 4 of the step-down voltage regulator U21 is grounded; pin 1 of the step-down voltage regulator U21 is connected to a first end of the resistor R5, a second end of the resistor R5 is connected to a first end of the capacitor C19, pin 8 of the step-down voltage regulator U21 is connected to a capacitor C17, and the other end of the capacitor C17 is connected to a second end of the capacitor C19 and grounded; an anode of the diode D3 is connected to the second terminal of the inductor L5, a cathode of the diode D3 is connected to a capacitor C14, a capacitor C11 and a capacitor C18, first terminals of the capacitor C14, the capacitor C11 and the capacitor C18 are connected to a cathode of the diode D3, second terminals of the capacitor C11 and the capacitor C18 are connected to each other and to ground, a first terminal of the capacitor C18 outputs 12V and is connected to a cathode of the bidirectional transient suppression diode D4, and an anode of the bidirectional transient suppression diode D4 is connected to ground; a first end of the resistor R1 is connected with a cathode of the diode D3, a second end of the resistor R1 is connected with a pin 2 of the step-down voltage regulator U21, the pin 2 of the step-down voltage regulator U21 is connected with a resistor R2, and the other end of the resistor R2 is grounded; the micro-control module comprises a microcontroller U10, a four-pin crystal oscillator Y2 and a circuit monitor U5, wherein the model of the microcontroller U10 is LPC1549JBD48, the model of the circuit monitor U5 is ADM809SARTZ, the pin 5 of the microcontroller U10 is connected with a resistor R3, the pin 24 of the microcontroller U10 is connected with a resistor R39, the other ends of the resistor R3 and the resistor R39 are connected with each other and input VDD3V3, the pin 27 of the microcontroller U10 is connected with a light emitting diode, the cathode of the light emitting diode is connected with the pin 27 of the microcontroller U10, the anode of the light emitting diode is connected with a resistor R4, the other end of the resistor R4 is input with VDD3V3, the pin 26 of the microcontroller U10 is connected with a resistor R10, the other end of the resistor R10 is connected with the OUT pin of the four-pin crystal oscillator Y10, the other end of the four-pin oscillator Y10 is connected with a capacitor C10 and the other end of the inductor L10, the other end of the capacitor C45 is connected with a GND pin of the four-pin crystal oscillator Y2 and is grounded; pin 34 of the microcontroller U10 is connected with pin 2 of the circuit monitor U5, pin 2 of the circuit monitor U5 is connected with a resistor R13, the other end of the resistor R13 is grounded, pin 3 of the circuit monitor U5 is input with VDD3V3, and pin 1 of the monitor U5 is grounded; pin 30, pin 16, pin 14, pin 10, pin 27, pin 42 and pin 39 of the microcontroller U10 are connected with each other and input to VDD3V3, pin 17, pin 11, pin 20, pin 40 and pin 41 of the microcontroller U10 are connected with each other and grounded, a capacitor C48 is connected between pin 30 and pin 17 of the microcontroller U10, and a capacitor C55, a capacitor C58, a capacitor C59, a capacitor C60 and a capacitor C49 are connected in parallel to the capacitor C48; the VDD3V3 input end of the microcontroller U10 is connected with the DP3V3 output end of the 3.3V power supply module; the real-time clock module comprises a real-time clock chip U15 and a capacitor C13, wherein the model of the real-time clock chip U15 is DS3231SN, pin 2 of the real-time clock chip U15 is connected with a resistor R26 and a capacitor C7, the other end of the resistor R26 is connected with a resistor R27 and inputs VDD3V3, the other end of the resistor R27 is connected with pin 3 of the real-time clock chip U15, pin 6, pin 7 and pin 8 of the real-time clock chip U15 are connected with each other and connected with the other end of the capacitor C7, pin 6 of the real-time clock chip U15 is grounded, pin 14 of the real-time clock chip U15 is connected with a capacitor C13 and a battery BAT1, pin 9, pin 10, pin 11 and pin 12 of the real-time clock chip U15 are connected with each other and connected with the other end of the capacitor C13, the other end of the capacitor C13 is grounded, and the other end of the battery BAT1 is grounded; the microcontroller U10 is connected with a CAN data transceiving module, the CAN data transceiving module comprises a CAN data transceiver U7, a three-pin connector P3 and an ESD electrostatic protection diode D2, the model of the CAN data transceiver U7 is TJA1051T-3, a pin 7 of the CAN data transceiver U7 is connected with a pin 3 of the three-pin connector P3, a pin 6 of the CAN data transceiver U7 is connected with a pin 1 of the three-pin connector P3, a pin 1 of the ESD electrostatic protection diode D2 is connected with a pin 6 of the CAN data transceiver U7, a pin 2 of the ESD electrostatic protection diode D2 is connected with a pin 7 of the CAN data transceiver U7, and a pin 3 of the ESD electrostatic protection diode D2 is grounded; a pin 7 of the CAN data transceiver U7 is connected with a resistor R22, a pin 6 of the CAN data transceiver U7 is connected with a resistor R23, the other end of the resistor R22 and the other end of the resistor R23 are connected with each other and connected with a capacitor C44, and the other end of the capacitor C44 is grounded; a capacitor C50 is connected to a pin 2 of the three-pin connector P3, the other end of the capacitor C50 is grounded, and a resistor R50 is connected to the capacitor C50 in parallel; a pin 3 of the CAN data transceiver U7 inputs VDD5V and is connected with a capacitor C43, the other end of the capacitor C43 is grounded, and a capacitor C9 is connected to the capacitor C43 in parallel; a pin 5 of the CAN data transceiver U7 is connected with a capacitor C1 and inputs VDD3V3, the other end of the capacitor C1 is grounded, and a capacitor C41 is connected to the capacitor C1 in parallel; a pin 8 of the CAN data transceiver U7 is connected with a resistor R28, a first end of the resistor R28 is connected with a pin 8 of the CAN data transceiver U7, and a second end of the resistor R28 is connected with a pin 2 of the CAN data transceiver U7 and grounded; a pin 4 of the CAN data transceiver U7 is connected with a resistor R19, and a pin 1 of the CAN data transceiver U7 is connected with a resistor R20; a first end of the resistor R28 is connected with a pin 18 of the microcontroller U10, the other end of the resistor R19 is connected with a pin 21 of the microcontroller U10, and the other end of the resistor R20 is connected with a pin 13 of the microcontroller U10; the input end of VDD5V of the CAN data transceiver module is connected with the 5V output of the 3.3V power supply module, and the input end of VDD3V3 of the CAN data transceiver module is connected with the DP3V3 output of the 3.3V power supply module; the interface module comprises a connector P9 and an exclusion RP5, wherein the connector P9 is a Header23X2, pins 1, 2, 43, 44, 45 and 46 of the connector P9 are grounded, pins 3 and 4 of the connector P9 are connected with a DP3V3 output end of the 3.3V power supply module, pins 5 and 6 of the connector P9 are connected with a 5V output end of the main power supply module, pin 11 of the connector P9 is connected with pin 43 of the microcontroller U10, and pin 13 of the connector P9 is connected with pin 44 of the microcontroller U10; the first input end, the second input end, the third input end and the fourth input end of the exclusion are mutually connected and are in output connection with DP3V3 of the 3.3V power supply module, the first output end of the exclusion is connected with a pin 20 of the connector P9 and a pin 15 of the real-time clock chip U15, the second output end of the exclusion is connected with a pin 19 of the connector P9 and a pin 16 of the real-time clock chip U15, the third output end of the exclusion is connected with a pin 18 of the connector P9, and the fourth output end of the exclusion is connected with a pin 17 of the connector P9; a capacitor C15 is connected to a pin 23 of the connector P9, a capacitor C20 is connected to a pin 25 of the connector P9, a capacitor C23 is connected to a pin 27 of the connector P9, a capacitor C22 is connected to a pin 29 of the connector P9, and the other end of the capacitor C15, the other end of the capacitor C20, the other end of the capacitor C23 and the other end of the capacitor C22 are connected to each other and grounded; an indicator light module is connected to the connector P9, the indicator light module comprises a light emitting diode D7 and a resistor R8, the anode of the light emitting diode D7 is connected with the pin 15 of the connector P9, the cathode of the light emitting diode D7 is connected with one end of the resistor R8, and the other end of the resistor R8 is grounded; the key and alarm interface module comprises a resistor RP1, a resistor RP2, a resistor RP3, a resistor RP4 and a 10-pin connector P7, wherein a pin 2 of the resistor RP3 is connected with a pin 9 of the 10-pin connector P7, a pin 4 of the resistor RP3 is connected with a pin 8 of the 10-pin connector P7, a pin 6 of the resistor RP3 is connected with a pin 7 of the 10-pin connector P7, and a pin 8 of the resistor RP3 is connected with a pin 6 of the 10-pin connector P7; pin 2 of the pack RP4 is connected with pin 5 of the 10-pin connector P7, pin 4 of the pack RP4 is connected with pin 4 of the 10-pin connector P7, pin 6 of the pack RP4 is connected with pin 3 of the 10-pin connector P7, and pin 8 of the pack RP4 is connected with pin 1 of the 10-pin connector P7; pin 10 of the 10-pin connector P7 is grounded, pin 2 of the 10-pin connector P7 is connected with a capacitor C21 and an inductor L6, the other end of the capacitor C21 is grounded, and the other end of the inductor L6 is connected with the 5V output end of the main power supply module; pin 1, pin 3, pin 5 and pin 7 of the excluder RP2 are connected to each other, pin 1, pin 3, pin 5 and pin 7 of the excluder RP1 are connected to each other, pin 1 of the excluder RP2 and pin 1 of the excluder RP1 are connected to each other and input to VDD3V3, pin 2 of the excluder RP2 is connected to pin 8 of the excluder RP4, pin 4 of the excluder RP2 is connected to pin 6 of the excluder RP4, pin 6 of the excluder RP2 is connected to pin 4 of the excluder RP4, and pin 8 of the excluder RP2 is connected to pin 2 of the excluder RP 4; pin 2 of the excluder RP1 is connected with pin 8 of the excluder RP3, pin 6 of the excluder RP1 is connected with pin 6 of the excluder RP3, pin 6 of the excluder RP1 is connected with pin 4 of the excluder RP3, pin 8 of the excluder RP1 is connected with pin 2 of the excluder RP 3; pin 1 of the bar RP3 is connected to pin 29 of the connector P9, pin 3 of the bar RP3 is connected to pin 30 of the connector P9, pin 5 of the bar RP3 is connected to pin 27 of the connector P9, pin 7 of the bar RP3 is connected to pin 28 of the connector P9, pin 1 of the bar RP4 is connected to pin 25 of the connector P9, pin 3 of the bar RP4 is connected to pin 26 of the connector P9, pin 5 of the bar RP4 is connected to pin 23 of the connector P9, and pin 7 of the bar RP4 is connected to pin 24 of the connector P9; VDD3V3 in the key and alarm interface module is connected with DP3V3 output of the 3.3V power supply module; the resistive touch screen interface module comprises a 6-pin connector P6, an inductor L12, an inductor L13, an ESD protection chip U16 and an exclusion LP1, wherein the model of the ESD protection chip U16 is PRTR5V0U2X, pin 3 of the ESD protection chip U16 is connected with pin 1 of the 6-pin connector P6, pin 2 of the ESD protection chip U16 is connected with pin 2 of the 6-pin connector P6, pin 1 of the ESD protection chip U16 is grounded, and pin 4 of the ESD protection chip U16 is input with VDD3V 3; pin 3 of the 6-pin connector P6 is connected with pin 1 of the exclusion LP1, pin 4 of the 6-pin connector P6 is connected with pin 3 of the exclusion LP1, pin 5 of the 6-pin connector P6 is connected with pin 5 of the exclusion LP1, and pin 6 of the 6-pin connector P6 is connected with pin 7 of the exclusion LP 1; a capacitor C62 is connected to a pin 3 of the 6-pin connector P6, a capacitor C63 is connected to a pin 4 of the 6-pin connector P6, a capacitor C75 is connected to a pin 5 of the 6-pin connector P6, and the other ends of the capacitor C62, the capacitor C63 and the capacitor C75 are connected with each other and grounded; a first end of the inductor L12 is connected with pin 1 of the 6-pin connector P6, and a first end of the inductor L13 is connected with pin 2 of the 6-pin connector P6; a second end of the inductor L12 is connected to the pin 18 of the connector P9, a second end of the inductor L13 is connected to the pin 17 of the connector P9, the pin 2 of the bank LP1 is connected to the pin 41 of the connector P9, the pin 4 of the bank LP1 is connected to the pin 42 of the connector P9, the pin 6 of the bank LP1 is input to VDD3V3, and the pin 8 of the bank LP1 is grounded; the VDD3V3 input of the resistive touch screen interface module is connected with the DP3V3 output of the 3.3V power supply module; the display screen driving module comprises a video signal conversion chip U4, an electrostatic protector U12, an electrostatic protector U13 and a connector P4, wherein the model of the video signal conversion chip U4 is THC63LVDM83D, the models of the electrostatic protector U12 and the electrostatic protector U13 are TPD4E05U06DQA, the model of the connector P4 is FI-X30HL, and a pin 51, a pin 50, a pin 2, a pin 8, a pin 10, a pin 15, a pin 16, a pin 17, a pin 18, a pin 25, a pin 5, a pin 13, a pin 21, a pin 29, a pin 33, a pin 35, a pin 36, a pin 43, a pin 49 and a pin 53 of the video signal conversion chip U4 are grounded; a resistor R31 is connected with a pin 31 of the video signal conversion chip U4, and a pin 26 and a pin 9 of the video signal conversion chip U4 are connected with each other and input with DP3V 3; a pin 34 of the video signal conversion chip U4 is connected with an inductor L2 and a capacitor C40, the other end of the inductor L2 is input with DP3V3, the other end of the capacitor C40 is grounded, and the capacitor C40 is connected with a capacitor C3 in parallel; a pin 44 of the video signal conversion chip U4 is connected with an inductor L7 and a capacitor C32, the other end of the inductor L7 is input with DP3V3, the other end of the capacitor C32 is grounded, and the capacitor C32 is connected in parallel with a capacitor C33; a pin 32 of the video signal conversion chip U4 is connected with a resistor R11, and the other end of the resistor R11 is input with DP3V 3; the pin 1 of the video signal conversion chip U4 inputs DP3V3, and the pin 31 of the video signal conversion chip U4 is connected with a resistor R18; pin 48 of the video signal conversion chip U4 is connected to pin 1 of the electrostatic protector U12, pin 47 of the video signal conversion chip U4 is connected to pin 2 of the electrostatic protector U12, pin 46 of the video signal conversion chip U4 is connected to pin 4 of the electrostatic protector U12, pin 45 of the video signal conversion chip U4 is connected to pin 5 of the electrostatic protector U12, pin 8 and pin 2 of the electrostatic protector U12 are connected to each other and grounded, pin 10 of the electrostatic protector U12 is connected to pin 18 of the connector P4, pin 9 of the electrostatic protector U12 is connected to pin 17 of the connector P4, pin 7 of the electrostatic protector U12 is connected to pin 15 of the connector P4, and pin 6 of the electrostatic protector U12 is connected to pin 14 of the connector P4; pin 42 of the video signal conversion chip U4 is connected to pin 1 of the electrostatic protector U13, pin 42 of the video signal conversion chip U4 is connected to pin 1 of the electrostatic protector U13, pin 41 of the video signal conversion chip U4 is connected to pin 2 of the electrostatic protector U13, pin 40 of the video signal conversion chip U4 is connected to pin 4 of the electrostatic protector U13, pin 39 of the video signal conversion chip U4 is connected to pin 5 of the electrostatic protector U13, pin 10 of the electrostatic protector U13 is connected to pin 12 of the connector P4, pin 9 of the electrostatic protector U13 is connected to pin 11 of the connector P4, pin 7 of the electrostatic protector U13 is connected to pin 9 of the connector P4, pin 6 of the electrostatic protector U13 is connected to pin 8 of the connector P4, pin 8 and pin 3 of the electrostatic protector U13 are connected with each other and grounded; pin 30, pin 29, pin 26, pin 23, pin 20, pin 19, pin 16, pin 13, pin 10, pin 7, pin 4, pin 3, and pin 1 of the connector P4 are grounded; pin P1 and pin P2 of the connector P4 are grounded; the pin 28 and the pin 27 of the connector P4 are connected with each other and connected with an inductor L1 and a capacitor C5, the other end of the inductor L1 is input with 12V, the other end of the capacitor C5 is grounded, the pin 22 and the pin 21 of the connector P4 are connected with each other and connected with an inductor L4 and a capacitor C35, the other end of the inductor L4 is input with DP3V3, the other end of the capacitor C35 is grounded, and the capacitor C35 is connected with a capacitor C28 in parallel; a resistor R16 is connected to a pin 6 of the connector P4, the other end of the resistor R16 is input with DP3V3, and a pin 5 of the connector P4 is grounded; a resistor R17 and a resistor R21 are connected to a pin 2 of the connector P4, the DP3V3 is input to the other end of the resistor R17, and the other end of the resistor R21 is grounded; a capacitor C2 is connected between the DP3V3 input end of the video signal conversion chip U4 and the ground end, and a capacitor 29, a capacitor 30, a capacitor 31 and a capacitor 34 are connected to the capacitor C2 in parallel; a DP3V3 input end of the video signal conversion chip U4 and a DP3V3 input end of the connector P4 are connected with a DP3V3 output of the 3.3V power supply module, and a 12 input end of the connector P4 is connected with a 12V output end of the 12V power supply module; the connector P4 is connected with a backlight adjusting interface module, the backlight adjusting interface module comprises a connector P8, a field effect transistor Q4 and a field effect transistor Q5, the model of the connector P8 is Header23X2, the models of the field effect transistor Q4 and the field effect transistor Q5 are NX7002AK, and pin 1 and pin 2 of the connector P8 are grounded; pin 1 of the fet Q4 is connected to pin 19 of the connector P8, pin 2 of the fet Q4 is grounded, pin 3 of the fet Q4 is connected to a resistor R29 and an inductor L17, the other end of the resistor R29 is input with DP3V3, and the other end of the inductor L17 is connected to pin 24 of the connector P4; pin 1 of the fet Q5 is connected to pin 26 of the connector P8, pin 2 of the fet Q5 is grounded, pin 3 of the fet Q5 is connected to a resistor R30 and an inductor L18, the other end of the resistor R30 is input with DP3V3, and the other end of the inductor L18 is connected to pin 25 of the connector P4; pin 27 of the connector P8 is connected to pin 28 of the video signal conversion chip U4, pin 28 of the connector P8 is connected to the other end of the resistor R18, pin 29 of the connector P8 is connected to pin 27 of the video signal conversion chip U4, pin 30 of the connector P8 is connected to pin 30 of the video signal conversion chip U4, pin 31 of the connector P8 is connected to pin 56 of the video signal conversion chip U4, pin 32 of the connector P8 is connected to pin 3 of the video signal conversion chip U4, pin 33 of the connector P8 is connected to pin 55 of the video signal conversion chip U4, pin 34 of the connector P8 is connected to pin 52 of the video signal conversion chip U4, pin 35 of the connector P8 is connected to pin 54 of the video signal conversion chip U4, pin 36 of the connector P8 is connected to pin 4614 of the video signal conversion chip U4, pin 37 of the connector P8 is connected to pin 11 of the video signal conversion chip U4, pin 38 of the connector P8 is connected to pin 12 of the video signal conversion chip U4, pin 39 of the connector P8 is connected to pin 6 of the video signal conversion chip U4, pin 40 of the connector P8 is connected to pin 7 of the video signal conversion chip U4, pin 41 of the connector P8 is connected to pin 24 of the video signal conversion chip U4, pin 42 of the connector P8 is connected to pin 4 of the video signal conversion chip U4, pin 43 of the connector P8 is connected to pin 22 of the video signal conversion chip U4, pin 44 of the connector P8 is connected to pin 23 of the video signal conversion chip U4, pin 46 of the connector P8 is connected with pin 20 of the video signal conversion chip U4; a pin 43 of the connector P8 is connected with a switch BOOT, and the other end of the switch BOOT is grounded; and the data transceiving end of the CAN data transceiver U7 is connected with the CAN interface of the main controller through a CAN bus.

4. The hydration treatment inlet and outlet liquid balance system control circuit of claim 3, wherein the battery charging and protecting unit comprises a battery charging module and a battery protecting module, and the battery charging module is connected with the battery protecting module; the battery charging module comprises a battery charging management U1 chip, a battery power management U3 chip, an ESD electrostatic protection U2 chip, a signal isolator U4 and an RP1 exclusion, wherein the battery power management U1 chip is CN3765, the battery power management U3 chip is LTC2944, and the ESD electrostatic protection U2 chip is PRTR5V0U 4D; the signal isolator U4 is a TLP 181; the 1 pin of the battery charging management U1 chip is connected with one end of a C3 capacitor, the other end of the C3 capacitor is connected with a C9 capacitor, the other end of the C3 capacitor is also connected with a C2 capacitor, the other end of the C3 capacitor is also connected with a C1 capacitor, the other end of the C3 capacitor is also connected with a D2 zener diode, the C3 capacitor, the C9 capacitor, the C2 capacitor, the C1 capacitor and the D2 zener diode are connected and then connected with a direct current voltage 24V, and the other ends of the C9 capacitor, the C2 capacitor, the C1 capacitor and the D2 zener diode are connected and then grounded; the other end of the C3 capacitor is also connected with a source S of a Q1 field effect transistor, a grid G at the other end of the Q1 field effect transistor is connected with a D1 diode, the other end of the D1 diode is connected with a D3 diode, the other end of the D3 diode is grounded, the other end of the D1 diode is also connected with an R5 resistor, the other end of the R5 resistor is connected with a C7 capacitor, and the other end of the C7 capacitor is grounded; the other end of the diode D1 is also connected with one end of an inductor L1, the other end of the inductor L1 is connected with a resistor R1, the other end of the resistor R1 is connected with a capacitor C10, the other end of the resistor R1 is connected with a capacitor C5, the other end of the resistor R1 is connected with a capacitor C6, the other ends of the resistor R1, the capacitor C10, the capacitor C5 and the capacitor C6 are connected and then connected with the positive electrode of a battery, and the other ends of the capacitor C10, the capacitor C5 and the capacitor C6 are connected and then grounded; the 2 pin of the battery charging management U1 chip is grounded; the 3 pin of the battery charging management U1 chip is connected with a D4 light-emitting diode, and the other end of the D4 light-emitting diode is connected with an R7 resistor; the 4 pins of the battery charging management U1 chip are connected with a D5 light emitting diode, the other end of the D5 light emitting diode is connected with an R6 resistor, and the R7 resistor is connected with an R6 resistor and then connected with an R9 resistor in series and then connected with a power supply voltage; the 5 pins of the battery charging management U1 chip are connected with an R2 resistor, the other end of the R2 resistor is connected with a C4 capacitor, and the other end of the C4 capacitor is grounded; the 6 pins of the battery charging management U1 chip are connected with the other end of the R3 resistor and then connected with the R4 resistor, and the other end of the R4 resistor is grounded; 7 pins of the battery charging management U1 chip are connected with an R1 resistor and then connected with an R3 resistor; 8 pins of the battery charging management U1 chip are connected with an L1 inductor and then connected with an R1 resistor; the 9 pin of the battery charging management U1 chip is connected with the other end of the C3 capacitor and then is connected with the C9 capacitor; the 10 pins of the battery charging management U1 chip are connected with the drain D of a Q1 field effect transistor; the 1 pin of the battery power management U3 chip is connected with a C8 capacitor, the other end of the C8 capacitor is connected with the 2 pin, the 3 pin, the 7 pin and the 0 pin of the battery power management U3 chip and then grounded, the 1 pin of the battery power management U3 chip is also connected with a D6 voltage stabilizing diode, and the other end of the D6 voltage stabilizing diode is grounded; 4 pins of the battery power management U3 chip are connected with 4 pins of an RP1 exclusion, 5 pins of the battery power management U3 chip are connected with 3 pins of an RP1 exclusion, and 6 pins of the battery power management U3 chip are connected with 1 pin of the RP1 exclusion; the battery power management U3 chip is characterized in that 8 pins of the battery power management U3 chip are connected with an R8 resistor, 8 pins of the battery power management U3 chip are connected with an R8 resistor and then connected with a battery output end, and the R8 resistor is connected with 1 pin of the battery power management U3 chip and then connected with the other end of an R1 resistor and then connected with an R3 resistor; the 1 pin of the ESD electrostatic protection U2 chip is connected with the 5 pins of the RP1 resistor bank; the 2 pin of the ESD electrostatic protection U2 chip is grounded; 4 pins of the ESD electrostatic protection U2 chip are connected with 8 pins of the RP1 exclusion; 6 pins of the ESD electrostatic protection U2 chip are connected with 6 pins of an RP1 resistor bank; the 1 pin of the signal isolator U4 is connected with the R11 resistor and then is connected with a power supply voltage; a pin 2 of the signal isolator U4 is connected with a sleep mode, a pin 3 of the signal isolator U4 is connected with a 5V power supply voltage of a battery pack, and a pin 4 of the signal isolator U4 is connected with the sleep mode of the battery pack; the battery protection module comprises a battery protection U4 chip, the model of the battery protection U4 chip is BQ77915, a pin 1 of the battery protection U4 chip is connected with a C1 capacitor, the other end of the C1 capacitor is grounded, a pin 1 of the battery protection U4 chip is also connected with an R8 resistor, the other end of the R8 resistor is connected with an R1 resistor, the other end of the R1 resistor is grounded, the other end of the R8 resistor is also connected with a supply voltage, a pin 1 of the battery protection U4 chip is also connected with an R4 resistor, the other end of the R4 resistor is connected with a D1 voltage stabilizing diode, the R4 resistor is also connected with a D6 voltage stabilizing diode, the D1 voltage stabilizing diode is grounded after being connected with the D6 voltage stabilizing diode, the R4 resistor is also connected with a D3 resistor, and the R4 resistor is also connected with a D5 voltage stabilizing diode; the D3 zener diode and the D5 zener diode are connected and then connected with the R31 resistor, the other end of the R31 resistor is connected with the 14 pins of the battery protection U4 chip, the D3 zener diode and the D5 zener diode are connected and then connected with a D4 diode, the D3 voltage stabilizing diode and the D5 voltage stabilizing diode are connected and then are also connected with an R30 resistor, the D4 diode is connected with the R30 resistor and then connected with the R28 resistor, the D4 diode is connected with the R30 resistor and then connected with the grid G of the Q3 field effect transistor, the other end of the R28 resistor is connected with the R24 resistor, the other end of the R24 resistor is connected with the 13 pin of the battery protection U4 chip, the D2 diode is connected in parallel with the R28 resistor, and the D2 diode is connected with the drain D of the Q3 field-effect transistor after being connected with the R28 resistor; the D3 voltage-stabilizing diode is connected with the D5 voltage-stabilizing diode and then is connected with the grid G of a Q3 field effect transistor, and the D3 voltage-stabilizing diode is connected with the D5 voltage-stabilizing diode and then is connected with PACK < - >; the D3 voltage-stabilizing diode is connected with the D5 voltage-stabilizing diode and then connected with a C19 capacitor, the other end of the C19 capacitor is connected with a C18 capacitor, the source S of the other end of the Q3 field effect transistor is connected with the source S of the Q4 field effect transistor, the grid G of the other end of the Q4 field effect transistor is connected with the C18 capacitor, the grid G of the other end of the Q4 field effect transistor is also connected with an R33 resistor, and the other end of the R33 resistor is connected with the D1 voltage-stabilizing diode and the D6 voltage-stabilizing diode and then grounded; the 2 pin of the battery protection U4 chip is connected with a C12 capacitor, and the other end of the C12 capacitor is grounded; the 3 pin of the battery protection U4 chip is connected with an R5 resistor, the other end of the R5 resistor is connected with the other end of the R4 resistor and then connected with a D1 voltage-stabilizing diode, and the 3 pin of the battery protection U4 chip is connected with a C3 capacitor; the 4-pin of the battery protection U4 chip is connected with the R9 resistor, the 4-pin of the battery protection U4 chip is also connected with the other end of the C3 capacitor, and the 4-pin of the battery protection U4 chip is also connected with the C6 capacitor; the 5-pin of the battery protection U4 chip is connected with the R10 resistor, the 5-pin of the battery protection U4 chip is also connected with the other end of the C6 capacitor, and the 5-pin of the battery protection U4 chip is also connected with the C8 capacitor; the 6 pin of the battery protection U4 chip is connected with the R11 resistor, the 6 pin of the battery protection U4 chip is also connected with the other end of the C8 capacitor, and the 6 pin of the battery protection U4 chip is also connected with the C9 capacitor; the 7 pin of the battery protection U4 chip is connected with an R14 resistor, the 7 pin of the battery protection U4 chip is also connected with the other end of a C9 capacitor, and a battery voltage signal is connected with the 3 pin, the 4 pin, the 5 pin, the 6 pin and the 7 pin of the battery protection U4 chip through an R5 resistor, an R9 resistor, an R10 resistor, an R11 resistor and an R14 resistor respectively and then is connected with the anode of a battery pack; the 7 pin of the battery protection U4 chip is also connected with a C10 capacitor, and the other end of the C10 capacitor is grounded; the 8 pin of the battery protection U4 chip is connected with a C11 capacitor, the other end of the C11 capacitor is grounded, the 8 pin of the battery protection U4 chip is also connected with an R16 resistor, and the other end of the R16 resistor is connected with a D1 voltage stabilizing diode and the cathode of a battery pack; the 9 pin of the battery protection U4 chip is grounded; the 10 pin of the battery protection U4 chip is connected with a C14 capacitor, the other end of the C14 capacitor is grounded, the 10 pin of the battery protection U4 chip is connected with an R26 resistor, the other end of the R26 resistor is connected with the D1 zener diode and then connected with the R33 resistor, the 11 pin of the battery protection U4 chip is connected with a C15 capacitor, the other end of the C15 capacitor is grounded, the 11 pin of the battery protection U4 chip is connected with the R27 resistor, the other end of the R27 resistor is connected with the other end of the R33 resistor, and a C13 capacitor is connected between the 10 pin and the 11 pin of the battery protection U4 chip in parallel; the 12 pins of the battery protection U4 chip are connected with an R23 resistor, the other end of the R23 resistor is connected with an R29 resistor, the other end of the R29 resistor is connected with the other end of an R33 resistor, and the other end of the R23 resistor is connected with a drain D of a Q4 field effect transistor; the 16 pins of the battery protection U4 chip are grounded; the 17 pin of the battery protection U4 chip is connected with an R2 resistor, and the other end of the R2 resistor is grounded; an R6 resistor is connected between an 18 pin and a 19 pin of the battery protection U4 chip and is connected with a magnetic voltage stabilizer TS, a 22 pin of the battery protection U4 chip is connected with an R7 resistor, and the other end of the R7 resistor is connected with a 2 pin of a signal isolator U4 in the battery charging module; the 23 pin and the 24 pin of the battery protection U4 chip are connected and then grounded; two ends of the D3 zener diode and the D5 zener diode are respectively connected with the anode and the cathode of the battery protection board, and the signal receiving and transmitting end of the battery power management U3 chip is connected with the power supply unit.

5. The hydration treatment inlet and outlet liquid balance system control circuit of claim 4, wherein the motor drive unit comprises a motor control module, a hall sensor interface module, a motor CAN interface module, a motor voltage conversion module, a motor drive module and a motor rotation detection module, and the hall sensor interface module, the motor CAN interface module, the motor voltage conversion module, the motor drive module and the motor rotation detection module are all connected with the motor control module; the motor control module comprises a micro-detector U7 chip, a low-voltage detection and reset U2 chip, a P3 interface and a P4 interface; the model of the micro detector U7 chip is LPC1549JBD48, the model of the low-voltage detection and reset U2 chip is CAT809STBI-GT3, and a pin 1 of the micro detector U7 chip is connected with the motor voltage conversion module; the 2 pins of the micro detector U7 chip are connected with a power supply voltage of 3.3V through an R1 resistor, and the 2 pins of the micro detector U7 chip are grounded through a C4 capacitor; pins 3, 4, 6, 7, 9, 18, 28 and 43 of the micro-detector U7 chip are connected with a motor driving module; the 5 pins of the micro-detector U7 chip are connected with a supply voltage DP3.3V through an R4 resistor; the pins 8, 15, 37 and 38 of the micro-detector U7 chip are connected with the motor rotation detection module; the pins 12, 13 and 21 of the micro-detector U7 chip are connected with the motor CAN interface module; the 22 pin of the micro detector U7 chip is connected with the 1 pin of the P3 interface, and the 23 pin of the micro detector U7 chip is connected with the 2 pin of the P3 interface; the 3 pin of the P3 interface is grounded; the 24 pins of the micro-detector U7 chip are connected with a supply voltage DV3.3V through an R5 circuit; the 44 pin and the 45 pin of the micro detector U7 chip are respectively connected with a power supply voltage DV3.3V through an R18 resistor and an R17 resistor; a 46 pin of the micro-detector U7 chip is connected with a D2 light emitting diode, and meanwhile, a power supply voltage DP3.3V is connected with a D2 light emitting diode through an R8 resistor to supply power for a D2 light emitting diode; the 47 pins of the micro-detector U7 chip are connected with a Hall sensor interface module; a 25 pin and a 26 pin of the micro-detector U7 chip are respectively connected with a3 pin and a1 pin of a Y1 crystal oscillator, the 3 pin and the 1 pin of the Y1 crystal oscillator are respectively connected with a C17 capacitor and a C18 capacitor and then grounded, and a 2 pin of the Y1 crystal oscillator is also connected with a C17 capacitor and a C18 capacitor and then grounded; a 34 pin of the micro detector U7 chip is connected with a 2 pin of the low-voltage detection and reset U2 chip, a 33 pin of the micro detector U7 chip is connected with a 2 pin of a P4 interface, a 29 pin of the micro detector U7 chip is connected with a3 pin of the P4 interface, and a4 pin of the P4 interface is grounded; the 17 pin and the 11 pin of the micro-detector U7 chip are connected and then grounded, the 10 pin, the 40 pin and the 41 pin of the micro-detector U7 chip are connected and then grounded, and FB2 ferrite beads are connected in parallel between the two grounding wires; the 16 pin, the 14 pin and the 10 pin of the micro detector U7 chip are connected and then connected with a power supply voltage AP3.3V, the 27 pin, the 42 pin and the 39 pin of the micro detector U7 chip are connected and then connected with a power supply voltage DP3.3V, an FB4 ferrite bead is connected in parallel between the two connecting lines, and the power supply voltage AP3.3V is grounded through a C15 capacitor and a C16 capacitor which are connected in parallel; the power supply voltage DP3.3V is grounded through a C11 capacitor, a C12 capacitor and a C13 capacitor which are connected in parallel; an R3 resistor is connected in parallel between a1 pin and a 2 pin of the low-voltage detection and reset U2 chip, one end of the R3 resistor, which is connected with the 1 pin of the low-voltage detection and reset U2 chip, is grounded, and a3 pin of the low-voltage detection and reset U2 chip is connected with a supply voltage DP3.3V; the Hall sensor interface module comprises a P2 interface; the P2 interface is connected with the Hall sensor; a pin 1 of the P2 interface is connected with an FB1 ferrite bead, the FB1 ferrite bead is connected with a supply voltage of 3.3V, the pin 1 of the P2 interface is further connected with a C6 capacitor, the other end of the C6 capacitor is grounded, a pin 2 of the P2 interface is connected with an R6 resistor, the other end of the R6 resistor is grounded, a pin 2 of the P2 interface is further connected with an R7 resistor and connected with a pin 47 of the micro-detector U7 chip, and a C10 capacitor is connected in series between the pin 2 of the P2 resistor and a ground terminal of the C6 capacitor; the motor CAN interface module comprises an interface integrated U4 chip; the model of the interface integrated U4 chip is CAN/TJA1051T/3, the 1 pin of the interface integrated U4 chip is connected with the 13 pin of the micro-detector U7 chip, the 2 pin of the interface integrated U4 chip is grounded, the 3 pin of the interface integrated U4 chip is connected with a C25 capacitor, the other end of the C25 capacitor is grounded, the 4 pin of the interface integrated U4 chip is connected with the 21 pin of the micro-detector U7 chip, the 5 pin of the interface integrated U4 chip is connected with a C23 capacitor, the other end of the C23 capacitor is grounded, the 5 pin of the interface integrated U4 chip is connected with a supply voltage of 3.3V, the 6 pin and the 7 pin of the interface integrated U4 chip are respectively connected with the 2 pin and the 1 pin of a D1ESD protection diode, the 3 pin of the D1ESD protection diode is grounded, the 8 pin of the interface integrated U4 chip is connected with an R9 resistor, the other end of the R9 resistor is grounded after being connected with the grounding end of the C23, and the 8 pins of the interface integrated U4 chip are also connected with the 12 pins of the micro-detector U7 chip; the motor voltage conversion module comprises a voltage stabilizer U5 chip and a low dropout regulator U6 chip; the model of the voltage stabilizer U5 chip is LMR14206XMK/NOPB, the model of the low dropout voltage stabilizer U6 chip is XC6206P332MR, and the power supply voltage DC24V supplies power to the voltage stabilizer U5 chip through the 4 pin and the 5 pin of the voltage stabilizer U5 chip; the 4 pin and the 5 pin of the voltage stabilizer U5 chip are connected and then grounded through a C8 capacitor; the 1 pin of the voltage stabilizer U5 chip is connected with a C7 capacitor, the other end of the C7 capacitor is connected with a D3 diode, the other end of the D3 diode is grounded, the other end of the C7 capacitor is also connected with an L1 inductor, the other end of the L1 inductor is connected with an R10 resistor, the other end of the R10 resistor is connected with an R11 resistor, the other end of the R11 resistor is grounded, the L1 inductor is also connected with the anode of a C9 capacitor, the cathode of the C9 capacitor is grounded, the other end of the L1 inductor is also connected with an FB3 ferrite bead, and the other end of the FB3 ferrite bead outputs VDD5V voltage; the other end of the FB3 ferrite bead is connected with a C2 capacitor, the other end of the FB3 ferrite bead is also connected with a Vin end of a low dropout regulator U6 chip, a Vout end of the low dropout regulator U6 chip outputs DP3.3V voltage, a Vout end of the low dropout regulator U6 chip is connected with a C1 capacitor, the C1 capacitor, the C2 capacitor and the low dropout regulator U6 chip are grounded after being connected, and the low dropout regulator U6 chip is also connected with a 30 pin of a micro detector U7 chip; the other end of the resistor R12 is connected with the resistor R14, the other end of the resistor R12 is connected with the resistor R14, the other end of the resistor R12 is connected with the resistor R13, the other end of the resistor R13 is connected with the capacitor C21, the other end of the C21 capacitor is grounded, and the other end of the R13 resistor is also connected with a1 pin of the micro detector U7 chip; the motor driving module comprises a driving U1 chip and an RP1 resistor pack; the driving U1 chip is of a model TMC5161-M, the driving U1 chip is connected with an electrostatic protection circuit, a1 pin of the driving U1 chip is grounded, a 2 pin of the driving U1 chip is connected with a C22 capacitor, the other end of a C22 capacitor is connected with the 1 pin of the driving U1 chip and then grounded, a 2 pin of the driving U1 chip is further connected with a 43 pin of a micro detector U7 chip, a3 pin of the driving U1 chip is connected with a C24 capacitor, a3 pin of the driving U1 chip is further connected with a VR3 resistor, the other end of the C24 capacitor is connected with the other end of the VR3 resistor and then grounded, a4 pin of the driving U1 chip is connected with a C14 capacitor, a4 pin of the driving U1 chip is further connected with a VR1 resistor, and the other end of the C14 capacitor is connected with the other end of the VR1 resistor and then grounded; the 5 pin of the driving U1 chip is connected with a C19 capacitor, the 5 pin of the driving U1 chip is also connected with a VR2 resistor, the other end of the C19 capacitor is connected with the other end of the VR2 and then grounded, the 6 pin of the driving U1 chip is connected with a C26 capacitor, the 6 pin of the driving U1 chip is also connected with a VR4 resistor, the other end of the C26 capacitor is connected with the other end of the VR4 resistor and then grounded, the 7 pin of the driving U1 chip is connected with the 1 pin of the driving U1 chip and then grounded, and the 8 pin of the driving U1 chip is connected with a supply voltage 24V; the 9 pins of the driving U1 chip are connected with an R2 resistor, the other end of the R2 resistor is grounded, and the 9 pins of the driving U1 chip are also connected with the 28 pins of the micro detector U7 chip; the 10 pins of the driving U1 chip are connected with the 9 pins of a micro detector U7 chip, the 10 pins of the driving U1 chip are also connected with the 4 pins of an RP1 exclusion, the 11 pins of the driving U1 chip are connected with the 7 pins of a micro detector U7 chip, the 11 pins of the driving U1 chip are also connected with the 3 pins of an RP1 exclusion, the 12 pins of the driving U1 chip are connected with the 18 pins of a micro detector U7 chip, the 12 pins of the driving U1 chip are also connected with the 2 pins of an RP1 exclusion, the 13 pins of the driving U1 chip are connected with the 6 pins of the micro detector U7 chip, the 13 pins of the driving U1 chip are also connected with the 1 pin of the RP1 exclusion, and the 5 pins, 6 pins, 7 pins and 8 pins of the RP1 pin are connected with a power supply voltage of 3.3V; the 14 pin of the driving U1 chip is connected with an R15 resistor, the other end of the R15 resistor is connected with the 5 pin of the micro detector U7 chip, the 15 pin of the driving U1 chip is connected with the 4 pin of the micro detector U7 chip, and the 16 pin of the driving U1 chip is connected with the 3 pin of the micro detector U7 chip; the motor rotation detection module comprises a position sensor U3 chip; the model of the position sensor U3 chip is AS5601, the 1 pin and the 2 pin of the position sensor U3 chip are connected with a power supply voltage of 3.3V, the 1 pin and the 2 pin of the position sensor U3 chip are connected and then grounded with a C20 capacitor, the 4 pin of the position sensor U3 chip is connected and then grounded with a C20 capacitor, the 5 pin of the position sensor U3 chip is connected with the 15 pin of the micro detector U7 chip, the 6 pin of the position sensor U3 chip is connected with the 38 pin of the micro detector U7 chip, the 6 pin of the position sensor U3 chip is further connected with an R19 resistor, the 7 pin of the position sensor U3 chip is connected with the 37 pin of the micro detector U7 chip, the 7 pin of the position sensor U3 chip is further connected with an R16 resistor, the other end of the R16 resistor is connected with the other end of the R19 resistor and then connected with a power supply voltage of 3.3V, the 8 pins of the position sensor U3 chip are connected with the 8 pins of the micro detector U7 chip; and the data transceiving end of the interface integrated U4 chip is connected with the CAN interface of the main controller through a CAN bus.

6. The hydration treatment liquid inlet and outlet balance system control circuit of claim 5, wherein the weighing unit comprises a weighing module, a digital-to-analog conversion circuit, a power conversion circuit, a weighing interface circuit and a weighing control module, and the weighing module, the digital-to-analog conversion circuit, the power conversion circuit and the weighing interface circuit are respectively connected with the weighing control module; the weighing module comprises a load cell B1, a load cell B2 and a load cell B3; the weight sensor B1, the load cell B2 and the load cell B3 are all PW6KRC3, a1 pin of the load cell B1 is grounded, and a 2 pin of the load cell B1 outputs AIN1+/weight through a resistor R9; the 3 pin of the load cell B1 outputs AIN1-/weight through a resistor R4; the capacitor C21 is respectively connected with the resistor R9 and the resistor R4; the 4 pin of the load cell B1 is connected with an AVDD5V power supply and is grounded through a capacitor C20, the 5 pin of the load cell B1 is grounded through a resistor R11, and the load cell B1 is grounded through a capacitor C22; the 1 pin of the load cell B2 is grounded, and the 2 pin of the load cell B2 outputs AIN2+/weight through a resistor R13; the 3 pin of the load cell B2 outputs AIN2-/weight through a resistor R12; the capacitor C26 is respectively connected with the resistor R13 and the resistor R12; the 4-pin of the load cell B2 is connected with an AVDD5V power supply and is grounded through a capacitor C23, the 5-pin of the load cell B2 is grounded through a resistor R14, and the load cell B2 is grounded through a capacitor C27; the 1 pin of the load cell B3 is grounded, and the 2 pin of the load cell B3 outputs AIN3+/weight through a resistor R16; the 3 pin of the load cell B3 outputs AIN3-/weight through a resistor R15; the capacitor C25 is respectively connected with the resistor R15 and the resistor R16; the 4 pin of the load cell B3 is connected with an AVDD5V power supply and is grounded through a capacitor C24, the 5 pin of the load cell B3 is grounded through a resistor R17, and the load cell B is grounded through a capacitor C30; the digital-to-analog conversion circuit comprises an analog-to-digital conversion U8 chip and a voltage reference U5 chip; the analog-to-digital conversion U8 chip is AD7793 BRU; the voltage reference U5 chip is NCP51460SN33T 1G; a1 pin of the analog-to-digital conversion U8 chip is connected with one end of the resistor R1, the other end of the resistor R1 is connected with a1 pin of the resistor bank RP1, a3 pin of the analog-to-digital conversion U8 chip is connected with a4 pin of the resistor bank RP1, a 5 pin of the analog-to-digital conversion U8 chip is connected with AIN1+/weight at one end of the capacitor C21 in the load cell B1, a 6 pin of the analog-to-digital conversion U8 chip is connected with AIN1-/weight at the other end of the capacitor C21 in the load cell B1, a 7 pin of the analog-to-digital conversion U8 chip is connected with AIN2+/weight at one end of the capacitor C26 in the load cell B2, an 8 pin of the analog-to-N2-/weight at one end of the capacitor C26 in the load cell B2, and an 8 pin of the analog-to AIN2+/weight chip 2 in the load cell B2, a10 pin of the analog-to-digital conversion U8 chip is connected with AIN3-/weight at the other end of the capacitor C25 in the load cell B2, a 12 pin of the analog-to-digital conversion U8 chip is grounded, a first end of a 14 pin of the analog-to-digital conversion U8 chip is connected with a 3.3V power supply, a second end of a4 pin of the analog-to-digital conversion U8 chip is grounded through the capacitor C3, a third end of the 4 pin of the analog-to-digital conversion U8 chip is grounded through the capacitor C4, one end of a 15 pin of the analog-to-digital conversion U8 chip is connected with a3 pin of the resistor RP1, the other end of the 15 pin of the analog-to-digital conversion U8 chip is connected with one end of the resistor R7, and a 16 pin of the analog-to-digital conversion U8 chip is connected with a3 pin of the resistor RP 1; the 5V voltage is electrically connected with the input end of the voltage reference U5 chip, the other end of the input end of the voltage reference U5 chip is grounded through the capacitor C33, the output end of the voltage reference U5 chip outputs 3.3V voltage, and the output end of the voltage reference U5 chip is grounded through a capacitor C9 and a capacitor C5 which are connected in parallel; the grounding end of the voltage reference U5 chip is grounded; the output end of the voltage reference U5 chip is connected with the 13 pins of the analog-to-digital conversion U8 chip; the power conversion circuit comprises a buck regulator U1 chip, a voltage regulator U4 chip, a P2 interface and a voltage regulator Q1 chip; the voltage reducing regulator U1 chip is LMR14206 XMK/NOPB; the voltage regulator U4 chip is TPS7A4700 RGWR; the voltage regulator Q1 chip is XC6206P332 MR; a pin 1 of the buck regulator U1 chip is connected with a first end of a capacitor C1, a second end of the capacitor C1 is connected with a pin 6 of the buck regulator U1 chip, a second end of the capacitor C1 is grounded through a diode D1, a second end of the capacitor C1 is connected with one end of an inductor L1, the other end of a resistor R3 is connected with a pin 3 of the buck regulator U1 chip and one end of a resistor R5, the other end of the resistor R5 is grounded, the other end of the capacitor C13 is grounded and one end of a capacitor C19, and the other end of the inductor L1 outputs 7V voltage; the other end of the inductor L1 is connected with the capacitor C13 and the capacitor C19 which are connected in parallel and then grounded; the other end of the inductor L1 is connected with one end of an inductor L2, the other end of the inductor L2 is grounded after passing through a capacitor C16, and the other end of the inductor L2 stably outputs 7V voltage; one end of a 2-pin of the buck regulator U1 chip is grounded, the other end of the 2-pin of the buck regulator U1 chip is connected with one end of the capacitor C2, a 4-pin of the buck regulator U1 chip is connected with a 5-pin of the buck regulator U1 chip, one end of the 5-pin of the buck regulator U1 chip is connected with a power supply, and the other end of the 5-pin of the buck regulator U1 chip is connected with the other end of the capacitor C2; the stably output 7V voltage is connected with pins 13, 15 and 16 of the voltage regulator U4 chip; the 2 pin, the 7 pin, the 17 pin, the 18 pin, the 19 pin and the 21 pin of the voltage regulator U4 chip are grounded in a merged mode, and the 8 pin and the 10 pin of the voltage regulator U4 chip are grounded in a merged mode; the 14 pins of the voltage regulator U4 chip are grounded through a capacitor C6; the voltage regulator U4 comprises a voltage regulator U4 chip, a capacitor C17, a capacitor C15, a filter LC1, a DVDD5V voltage output by the other end of the filter LC1, a capacitor C11, and a ground circuit, wherein the 1 pin, the 20 pin and the 3 pin of the voltage regulator U4 chip are combined and then grounded through the capacitor C17 and the capacitor C15 which are connected in parallel, the voltage of the AVDD5V is output and then connected with one end of the filter LC1, the other end of the filter LC1 is connected with the input end Vin of the voltage regulator Q1 chip, the other end of the filter LC1 is grounded through the capacitor C11, and the third end of the filter LC1 is grounded; the output end of the voltage regulator Q1 chip outputs DP3.3V voltage, and is grounded through a capacitor C14; the grounding end of the voltage regulator Q1 chip is grounded; the 4 pins of the P2 interface are respectively connected with one end of a diode D4 and one end of the capacitor C18, the 5 pins of the P2 interface are respectively connected with the other end of the diode D4 and the other end of the capacitor C18, one end of the capacitor C18 is connected with one end of the capacitor C2, and the other end of the capacitor C18 is connected with the other end of the capacitor C2; 2 pipe legs and 3 pipe legs of the P2 interface are connected with the weighing interface circuit; the weighing interface circuit comprises a CAN transceiver U2 chip, and a1 pin and a4 pin of the CAN transceiver U2 chip are connected with the weighing control module; the 2 pin of the CAN transceiver U2 chip is grounded, the 3 pin of the CAN transceiver U2 chip is grounded through a capacitor C10 and a capacitor C8 which are connected in parallel, the 3 pin of the CAN transceiver U2 chip is simultaneously connected with a DVDD5V voltage, the 5 pin of the CAN transceiver U2 chip is connected through a capacitor C7, and the 8 pin of the CAN transceiver U2 chip is grounded through a resistor R6; the 6 pin and the 7 pin of the CAN transceiver U2 chip are respectively connected with the 2 pin and the 1 pin of the electrostatic protection diode D2, and the 3 pin of the electrostatic protection diode D2 is grounded; the 6 pin and the 7 pin of the CAN transceiver U2 chip are also respectively connected with the 2 tube leg and the 3 tube leg of the P2 interface; the 1 tube leg of the P2 interface is grounded through a capacitor C12 and a resistor R8 which are connected in parallel; the weighing control module comprises a weighing microcontroller U7 chip and a reset U3 chip; the weighing microcontroller U7 chip is LPC11C14FBD 48/301; the reset U3 chip is ADM809SARTZ, and a DP3.3V power supply supplies power to 4 tube legs of the weighing microcontroller U7 chip through R20; DP3.3V Power supply supplies power to the 14 legs of the weighing microcontroller U7 chip through R10; one end of a 6 pin of the weighing microcontroller U7 chip is connected with a3 pin of the crystal oscillator Y2, the other end of the 6 pin of the weighing microcontroller U7 chip is connected with one end of a capacitor C38, the other end of the capacitor C38 is grounded, one end of a 7 pin of the weighing microcontroller U7 chip is connected with a1 pin of the crystal oscillator Y2, the other end of the 7 pin of the weighing microcontroller U7 chip is connected with one end of a capacitor C41, and the other end of the capacitor C41 is grounded; DP3.3V power supply supplies power to the 8 pin and 44 pin of the weighing microcontroller U7 chip; the 8 pin of the weighing microcontroller U7 chip is connected with the 44 pin of the weighing microcontroller U7 chip and is grounded through a capacitor C28 and a capacitor C29 which are connected in parallel, the 12 pin of the weighing microcontroller U7 chip is connected with one end of the light-emitting diode D6, the other end of the light-emitting diode D6 is connected with a DP3.3V power supply through the resistor R18, and the 13 pin of the weighing microcontroller U7 chip is connected with the 8 pin of the CAN transceiver U2 chip; the weighing microcontroller U7 chip has 19 pins connected to the 4 pins of the CAN transceiver U2 chip, the weighing microcontroller U7 chip has 20 pins connected to the 1 pin of the CAN transceiver U2 chip, the weighing microcontroller U7 chip has 26 pins connected to the 3 pins of the A/D conversion U8 chip, the weighing microcontroller U7 chip has 27 pins connected to the 15 pins of the A/D conversion U8 chip, the weighing microcontroller U7 chip has 28 pins connected to the 16 pins of the A/D conversion U8 chip, the weighing microcontroller U7 chip has 31 pins connected to the 1 pin of the A/D conversion U8 chip via the resistor R1, the weighing microcontroller U7 chip has 32 pins connected to the 15 pins of the A/D conversion U8 chip via the resistor R7, and the reset U3 chip has 2 pins connected to the 3 pins of the weighing microcontroller U7 chip, the 1 pin of the reset U3 chip is grounded, the 1 pin of the reset U3 chip is also connected with the 2 pin of the reset U3 chip through the resistor R2, and the 3 pin of the reset U3 chip is connected with a DP3.3V power supply; and the data transceiving end of the CAN transceiver U2 chip is connected with the CAN interface of the main controller through a CAN bus.

7. The hydration treatment inlet and outlet liquid balance system control circuit of claim 6, wherein the power supply unit comprises a power conversion circuit, an indicator light module, a control circuit, a fan module, a battery pack interface, a current detection circuit and a key switch detection module, wherein the power conversion circuit supplies power to the indicator light module, the fan module, the battery pack interface, the current detection circuit and the key switch detection module; the indicator light module, the fan module, the battery pack interface, the current detection circuit and the key on/off detection module are respectively connected with the control circuit; the power supply conversion circuit comprises a battery monitoring control circuit and a low-voltage conversion circuit, wherein the battery monitoring control circuit comprises a battery P4 interface, a battery charging P1 interface, a power supply switching U1 chip, a photoelectric coupler U8 and a voltage conversion U2 chip; the low-voltage conversion circuit comprises a voltage conversion U9 chip, a voltage regulation VR2 chip and an output control U6 chip; the interface of the battery P4 is XT60 PW-M-2P; the battery charging P1 interface is MR30 PW-F-3P; the power switching U1 chip is LTC4412ES6# PBF; the photoelectric coupler U8 is TLP 181; the voltage conversion U2 chip is TPS7B 6933; the voltage conversion U9 chip is LMR14206 XMK/NOPB; the output control U6 chip is a TLP 181; the 1 pin of the battery P4 interface is grounded, the 2 pin of the battery P4 interface provides 24V power, the second end of the 2 pin of the battery P4 interface is connected with the D pole of the fet Q13, the first end of the S pole of the fet Q13 is connected with one end of the capacitor C33, the second end of the S pole of the fet Q13 is connected with the 1 pin of the battery charging P1 interface and with the charging power supply 24V, the other end of the capacitor C33 is connected with the 2 pin of the battery charging P1 interface and grounded, the first end of the G pole of the fet Q13 is connected with the D pole of the fet Q13 through the resistor R2, the second end of the G pole of the fet Q13 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the C collector of the triode Q4, the E collector of the triode Q4 is grounded and connected with the collector of the Q4B through the resistor R2, a first end of a B collector of the triode Q4 is grounded through a capacitor C35; the first end of the B collector of the triode Q4 is connected with the control circuit through a resistor R45; the 2 pin and the 3 pin of the power switching U1 chip are merged and then grounded, the first end of the 1 pin of the power switching U1 chip is connected with the input battery 21V and grounded through the capacitor C34, the 1 pin of the power supply switching U1 chip is connected with the S pole of a field effect transistor Q12, the 5 pin of the power supply switching U1 chip is connected with the G pole of the field effect transistor Q12, the 6 th pin of the power supply switching U1 chip is connected with the D pole of the field effect transistor Q12, the D pole of the field effect transistor Q12 is grounded through a capacitor C32, the D pole of the field effect transistor Q12 is connected with one end of a fuse F1, the other end of the fuse F1 is connected with one end of a resistor R36, the other end of the resistor R36 is respectively connected with a power supply voltage 24V and one end of a fuse F2; two ends of the resistor R36 are respectively connected with two ends of the capacitor C44 through a resistor R48 and a resistor R50 and are connected with the current detection circuit; the 4 pins of the power supply switching U1 chip are connected with the control circuit, and the 4 pins of the power supply switching U1 chip are connected with the power supply voltage of 3.3V through a resistor R1; a pin 1 of the photoelectric coupler U8 is connected with a working voltage of 3.3V, a pin 3 of the photoelectric coupler U8 is grounded, a pin 4 of the photoelectric coupler U8 is connected with one end of a resistor R18, the other end of the resistor R18 is connected with a pole G of a field effect transistor Q3, one end of a pole S of the field effect transistor Q3 is connected with the pole G of the field effect transistor Q3 through a resistor R44, the other end of the pole S of the field effect transistor Q3 is connected with the other end of the fuse F2, a pole D of the field effect transistor Q3 is connected with one end of the resistor R14, and the other end of the resistor R14 outputs a voltage of 24V; two ends of the resistor R14 are respectively connected with two ends of the capacitor C7 through a resistor R15 and a resistor R16 and are connected with the current detection circuit; the ground terminal of the voltage conversion U2 chip is grounded, and is connected with the output terminal of the voltage conversion U2 chip through one end of a capacitor C3, the ground terminal of the voltage conversion U2 chip is also connected with one end of the voltage output terminal of the voltage conversion U2 chip through a capacitor C1 and a capacitor C4, the other end of the capacitor C3 is connected with an input voltage of 3.3V, one end of the capacitor C4 is connected with a system power supply 24V and is grounded through a diode D6, and one end of the diode D6 is connected with the third end of the 2-pin of the battery P4 interface through a diode D9; a pin 1 of the voltage conversion U9 chip is connected with a pin 6 of the voltage conversion U9 chip through a capacitor C28, a capacitor C28 is grounded through a diode D1, a capacitor C28 is connected with a first end of an inductor L2, a second end of the inductor L2 is connected with a pin 3 of the voltage conversion U9 chip through one end of a resistor R40, the other end of the resistor R40 is grounded through a resistor R41, the inductor L2 is grounded through a capacitor C39 and a capacitor C37 which are connected in parallel, a second end of the inductor L2 is connected with one end of a ferrite bead FB601, and the other end of the ferrite bead FB601 outputs a VDD5V voltage; the second end of the inductor L2 is connected with the voltage input end of the voltage regulation VR2 chip; the voltage output end of the voltage regulation VR2 chip outputs VDD3.3V voltage; the voltage input end of the voltage regulation VR2 chip is grounded through a capacitor C26; the voltage output end of the voltage regulation VR2 chip is grounded through a capacitor C24; the grounding end of the voltage regulation VR2 chip is grounded; the 2 pin of the voltage conversion U9 chip is grounded, the 4 pin of the voltage conversion U9 chip is connected with the 5 pin of the voltage conversion U9 chip through a resistor R22, the 4 pin of the voltage conversion U9 chip is also connected with one end of a resistor R43, the other end of the resistor R43 is grounded, the D pole of a field effect transistor Q6 is connected with one end of the resistor R43, the S pole of a field effect transistor Q6 is connected with the other end of the resistor R43, the G pole of the field effect transistor Q6 is connected with a supply voltage of 3.3V through a resistor R42, and the 5 pin of the voltage conversion U9 chip is grounded through a capacitor C30; the G pole of the field effect transistor Q6 is connected with the control circuit; a pin 1 of the output control U6 chip is connected with a power supply voltage of 3.3V, a pin 3 of the output control U6 chip is grounded, a pin 4 of the output control U6 chip is connected with one end of a resistor R38, the other end of the resistor R38 is connected with a G pole of a field effect transistor Q2, a D pole of the field effect transistor Q2 is connected with one end of a fuse F3, and the other end of the fuse F3 is connected with a voltage of 24V; the D pole of the field effect transistor Q2 is connected with the 5 pin of the voltage conversion U9 chip; the resistor R38 is connected with the D pole of the field effect transistor Q2 through a resistor R34; the S pole of the field effect transistor Q2 is connected with RPI24V through a resistor R26, and two ends of the resistor R26 are respectively connected with two ends of a capacitor C27 through a resistor R35 and a resistor R37 and are connected with a current detection circuit; the indicator light module comprises a pin connector P5 interface and a low-pass filter LP 1; the 1 pin of the pin connector P5 interface is connected with the working voltage 5V through a ferrite bead FB2, the 1 pin of the pin connector P5 interface is grounded through a capacitor C9, the 2 pin, the 3 pin, the 4 pin and the 5 pin of the pin connector P5 interface are grounded through a capacitor C10, a capacitor C15, a capacitor C20 and a capacitor C22 respectively, and the 2 pin, the 3 pin, the 4 pin and the 5 pin of the pin connector P5 interface are connected with the low-pass filter LP 1; the 6 pins of the pin connector P5 interface are grounded; the battery power supply indicating output end of the low-pass filter LP1 is connected with the D pole of a field effect transistor Q7 through a resistor R30, the S pole of the field effect transistor Q7 is grounded, the G pole of the field effect transistor Q7 is connected with a control circuit, the charging indicating end of the low-pass filter LP1 is connected with the D pole of the field effect transistor Q9 through a resistor R29, the S pole of the field effect transistor Q9 is grounded, the G pole of the field effect transistor Q9 is connected with the control circuit, the power supply indicating end of the low-pass filter LP1 is connected with the D pole of the field effect transistor Q5 through a resistor R28, the S pole of the field effect transistor Q5 is grounded, the G pole of the field effect transistor Q5 is connected with the control circuit, and the main power supply switch indicating end of the low-pass filter LP1 is connected with the control circuit.

8. The control circuit comprises a microcontroller U7 chip, a CAN transceiver U5 chip and a monitor U3 chip; the chip of the microcontroller U7 is LPC1549JBD 48; the chip of the CAN transceiver U5 is TJA 1051T/3; the monitor U3 chip is CAT809STBI-GT3, the 1 pin of the microcontroller U7 chip is connected with the G pole of the FET Q6 in the low voltage conversion circuit, the 2 pin of the microcontroller U7 chip is connected with the 2 pin of the photocoupler U8 through the resistor R51 in the battery monitoring control circuit, the 3 pin of the microcontroller U7 chip is connected with the 2 pin of the output control U6 chip in the low voltage conversion circuit through the resistor R24, the 4 pin of the microcontroller U7 chip is grounded through the resistor R21, the 4 pin of the microcontroller U7 chip is connected with the G pole of the FET Q14, the S pole of the FET Q14 is grounded, the D pole of the FET Q14 is connected with the 2 pin of the buzzer LS1, the D pole of the FET Q14 is connected with the diode D14 through the resistor R20, the diode D14 is connected with the 1 pin of the buzzer LS1, VDD5V is connected with pin 2 of a buzzer LS 1; the 5 pin of the microcontroller U7 chip is voltage connected to DP3.3V through resistor R8, the 18 pin of the microcontroller U7 chip is voltage connected to VDD3.3V through led D8 and resistor R49, the 19 pin of the microcontroller U7 chip is voltage connected to VDD3.3V through led D5 and resistor R31, the 25 pin of the microcontroller U7 chip is connected with the 3 pin of the crystal oscillator Y2, the 26 pin of the microcontroller U7 chip is connected with the 1 pin of the crystal oscillator Y2, the 2 pin of the crystal oscillator Y2 is respectively connected with the 3 pin and the 1 pin of the crystal oscillator Y2 through a capacitor C41 and a capacitor C42 and is grounded, the 47 pin of the microcontroller U7 chip is connected to the B collector of the transistor Q4 through a resistor R45 of a battery monitor control circuit, the 48 pins of the microcontroller U7 chip are connected with the 4 tube legs of the power supply switching U1 chip of the battery monitoring control circuit; the 30 pins of the microcontroller U7 chip are connected with DP3.3V voltage, and the 10 pins, the 14 pins, the 16 pins, the 27 pins, the 39 pins and the 42 pins of the microcontroller U7 chip are connected with DP3.3V voltage; pins 11, 17, 20, 40 and 41 of the microcontroller U7 chip are grounded after being connected; a pin 1 of the CAN transceiver U5 chip is connected with a pin 7 of the microcontroller U7 chip, a pin 2 of the CAN transceiver U5 chip is grounded, a pin 3 of the CAN transceiver U5 chip is grounded through a capacitor C18 and a capacitor C23 respectively, a pin 3 of the CAN transceiver U5 chip is also connected with VDD5V voltage, a pin 4 of the CAN transceiver U5 chip is connected with a pin 6 of the microcontroller U7 chip, a pin 5 of the CAN transceiver U5 chip is connected with VDD3.3V voltage, a pin 5 of the CAN transceiver U5 chip is grounded through a capacitor C17, a pin 6 and a pin 7 of the CAN transceiver U5 chip are combined through a resistor R11 and a resistor 12 respectively and are grounded through a capacitor C19 after being combined, a pin 8 of the CAN transceiver U5 chip is grounded through a resistor R32, and a pin U5 chip is connected with a pin 9 of the microcontroller U7 chip; one end of a1 pin of the monitor U3 chip is grounded and is also connected with a 2 pin of the monitor U3 chip through a resistor R3, the 2 pin of the monitor U3 chip is connected with a 34 pin of the microcontroller U7 chip, and a3 pin conversion joint of the monitor U3 chip is connected and has a voltage of 3.3V; the 12 pins of the microcontroller U7 chip are connected with the G pole of a field effect transistor Q7 in the indicator light module; the 15 pins of the microcontroller U7 chip are connected with the G pole of a field effect transistor Q5 in the indicator light module; the 13 pins of the microcontroller U7 chip are connected with the G pole of a field effect transistor Q9 in the indicator light module; pins 21 and 28 of the microcontroller U7 chip are connected with the key on-off module; the 24 pins of the microcontroller U7 chip are connected with DP3.3V voltage through a resistor R27; pins 37, 38, 43, 44, 45 and 46 of the microcontroller U7 chip are connected with a battery pack interface; the fan module includes a speed sensor P3 interface; the 1 pin of the speed sensor P3 interface is grounded, the 3 pin of the speed sensor P3 interface is connected with one end of a fuse F4, the other end of the fuse F4 is connected with an RPI24V, the 2 pin of the speed sensor P3 interface is connected with the first end of a triode D4, the second end of the triode D4 is powered by resistors R23 and VDD3.3V, the second end of the triode D4 is grounded by a triode D2, and the second end of the triode D4 is connected with the 8 pin of the microcontroller U7 chip by a resistor R25; the battery pack interface comprises a P2 interface; the 1 pin of the P2 interface is grounded, the 2 pin of the P2 interface is connected with the working voltage of 3.3V, the 2 pin of the P2 interface is also grounded through a capacitor C36, the 3 pin interface of the P2 is connected with the 43 pin of the microcontroller U7 chip, the 3 pin of the P2 interface is grounded through a capacitor C40, and the 3 pin of the P2 interface is connected with the voltage of VDD3.3V through a light-emitting diode D12 and a resistor R47; the 4 pins of the P2 interface are connected with the 44 pins of the microcontroller U7 chip, the 4 pins of the P2 interface are grounded through a capacitor C38, and the 4 pins of the P2 interface are connected with VDD3.3V voltage through a light-emitting diode D11 and a resistor R6; the 5 pin of the P2 interface is connected with the 45 pin of the microcontroller U7 chip, the 5 pin of the P2 interface is grounded through a capacitor C29, the 5 pin of the P2 interface is connected with VDD3.3V voltage through a resistor R7, and the 5 pin of the P2 interface is also grounded through a resistor R9; the 6 pins of the P2 interface are connected with the 37 pins of the microcontroller U7 chip, and the 6 pins of the P2 interface are grounded through an electrostatic protection diode D13; the 7 pins of the P2 interface are connected with the 38 pins of the microcontroller U7 chip, and the 7 pins of the P2 interface are grounded through an electrostatic protection diode D7; the 8 pin of the P2 interface is connected with the 46 pin of the microcontroller U7 chip, the 8 pin of the P2 interface is connected with VDD3.3V voltage through a resistor R19, and the 8 pin of the P2 interface is grounded through a capacitor C31; 8 pins of the P2 interface are connected with 8 pins of an RP1 exclusion in the battery charging module, 7 pins of the P2 interface are connected with 6 pins of an RP1 exclusion in the battery charging module, and 6 pins of the P2 interface are connected with 5 pins of an RP1 exclusion in the battery charging module; the current detection circuit comprises a current detection U4 chip; the current detection U4 chip is INA 3221; the 1 pin and the 2 pin of the current detection U4 chip are respectively connected with a resistor R37 and a resistor R35 of the low-voltage conversion circuit; the 3 pins, the 0 pin and the 5 pin of the current detection U4 chip are grounded, and the 4 pins of the current detection U4 chip are connected through a capacitor C6; the 6 pin of the current detection U4 chip is connected with the 37 pin of the microcontroller U7 chip, the 7 pin of the current detection U4 chip is connected with the 38 pin of the microcontroller U7 chip, the 6 pin and the 7 pin of the current detection U4 chip are respectively connected with the working voltage of 3.3V through a resistor R39 and a resistor R33, and the 11 pin and the 12 pin of the current detection U4 chip are respectively connected with a resistor R48 and a resistor R50 of the battery monitoring control circuit; the 14 pin and the 15 pin of the current detection U4 chip are respectively connected with a resistor R15 and a resistor R16 of the battery monitoring control circuit; the key on-off module comprises a field effect tube group Q10; a pin 1 of the fet group Q10 is grounded via a resistor R4, a pin 1 of the fet group Q10 is further connected to a pin 21 of the microcontroller U7 chip, a pin 2 of the fet group Q10 is connected to VCC3.3V in voltage, a pin 2 of the fet group Q10 is connected to one end of a resistor R17, the other end of the resistor R17 is connected to one end of a triode D3, the other end of the triode D3 is connected to a main power switch, a pin 3 of the fet group Q10 is connected to the other end of the resistor R17, a pin 4 of the fet group Q10 is connected to a DP3.3V power supply, a pin 4 of the fet group Q10 is grounded via a capacitor C43, a pin 4 of the fet group Q10 is further connected to a first end of a resistor R10, a second end of the resistor R10 is grounded via a capacitor C8, and a second end of the resistor R10 is connected to a pin 28 of the microcontroller U7 chip, the second end of the resistor R10 is also connected with the other end of the diode D3 through a diode D10, the 5 pin of the field effect tube group Q10 is grounded, and the 6 pin of the field effect tube group Q10 is connected with the 3 pin of the field effect tube group Q10 and then is grounded through a capacitor C25; and the data transceiving end of the CAN transceiver U5 chip is connected with the CAN interface of the main controller.