CN112748684A - Monitoring control system and device of intelligent insulin pump based on RFID - Google Patents

Monitoring control system and device of intelligent insulin pump based on RFID Download PDF

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CN112748684A
CN112748684A CN202011523350.8A CN202011523350A CN112748684A CN 112748684 A CN112748684 A CN 112748684A CN 202011523350 A CN202011523350 A CN 202011523350A CN 112748684 A CN112748684 A CN 112748684A
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port
resistor
blood sugar
singlechip
single chip
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CN112748684B (en
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许敬梅
夏徽
孙桂华
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    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
    • A61M5/14248—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body of the skin patch type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/172—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic
    • A61M5/1723—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic using feedback of body parameters, e.g. blood-sugar, pressure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/172—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic
    • A61M5/1723—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic using feedback of body parameters, e.g. blood-sugar, pressure
    • A61M2005/1726—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body electrical or electronic using feedback of body parameters, e.g. blood-sugar, pressure the body parameters being measured at, or proximate to, the infusion site
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/18—General characteristics of the apparatus with alarm
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/50—General characteristics of the apparatus with microprocessors or computers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/60—General characteristics of the apparatus with identification means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/60—General characteristics of the apparatus with identification means
    • A61M2205/6009—General characteristics of the apparatus with identification means for matching patient with his treatment, e.g. to improve transfusion security
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/20—Blood composition characteristics
    • A61M2230/201—Glucose concentration
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25257—Microcontroller

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  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • Vascular Medicine (AREA)
  • Anesthesiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Dermatology (AREA)
  • General Physics & Mathematics (AREA)
  • Diabetes (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention discloses a monitoring control system of an intelligent insulin pump based on RFID and a device thereof, comprising a power supply, a main singlechip system, a standby singlechip system, a singlechip fault detection circuit, an instruction input unit, a blood sugar acquisition device, a motor driving module and an RFID electronic tag, wherein the input end of the singlechip fault detection circuit is connected with the output end of the main singlechip system, the system is used for detecting whether a main single-chip microcomputer system fails or not, the output end of a single-chip microcomputer fault detection circuit is respectively connected with a switch switching circuit and a standby single-chip microcomputer system, the standby single-chip microcomputer system is triggered to start, the RFID electronic tag transmits human body identity information, human body blood sugar concentration and fault alarm signals to an upper computer through an RFID data acquisition device, the upper computer is used for receiving patient identity information, human body blood sugar concentration and fault alarm signals to display, and real-time monitoring of blood sugar data of each patient and real-time monitoring of faults of the single-chip microcomputer are achieved.

Description

Monitoring control system and device of intelligent insulin pump based on RFID
Technical Field
The invention relates to the field of control of intelligent insulin pumps, in particular to a monitoring control system and a monitoring control device of an intelligent insulin pump based on RFID.
Background
The modern medical field considers that the best choice for strengthening the blood sugar control is to install an insulin pump, the pump is popular in the world and also introduced into China, and good effects are basically obtained from the using effect of patients who install the insulin pump at present.
The insulin pump is also called open-loop artificial insulin, and adopts a continuous subcutaneous insulin input method. It consists of three parts, a pump container for regular insulin, a small battery-driven pump, and a control chip for the patient to accurately control the dosage of insulin released by the pump, which is enclosed in a plastic case, which is sized like a pager.
The pump container releases insulin to the human body from the thin plastic tube by drawing of the input command. The needle or hose is inserted subcutaneously, usually positioned in the abdomen. The method can stabilize blood sugar, minimize risk of hyperglycemia and hypoglycemia, recover normal life of patients, and improve life quality.
However, the existing control device of insulin pump does not have a fault monitoring function, and once the control chip fails, the dosage of insulin released by the pump cannot be accurately controlled. And the control device of the existing insulin pump does not have the function of monitoring the blood sugar in real time.
Disclosure of Invention
The invention aims to provide a monitoring control device and a monitoring control system of an intelligent insulin pump, aiming at the corresponding defects of the prior art, wherein the monitoring control device is provided with two sets of single chip microcomputer systems, one is main and the other is standby, when the main single chip microcomputer system is damaged, the standby single chip microcomputer system is automatically switched, and the monitoring control device also has the functions of single chip microcomputer fault monitoring and human body blood sugar real-time monitoring.
The purpose of the invention is realized by adopting the following scheme: a monitoring control device of an intelligent insulin pump comprises a power supply, a main single chip microcomputer system, a standby single chip microcomputer system, a single chip microcomputer fault detection circuit, an instruction input unit, a blood sugar acquisition device, a motor driving module and an RFID electronic tag, wherein the power supply is used for supplying power to the whole device; a first switch switching circuit is arranged between the blood sugar collecting device and the main singlechip system and between the blood sugar collecting device and the standby singlechip system and is used for controlling the on-off between the blood sugar collecting device and the main singlechip system and between the blood sugar collecting device and the standby singlechip system; a second switch switching circuit is arranged between the motor driving module and the main single chip microcomputer system and between the motor driving module and the standby single chip microcomputer system and is used for controlling the on-off between the motor driving module and the main single chip microcomputer system and between the motor driving module and the standby single chip microcomputer system; a third switch switching circuit is arranged between the RFID electronic tag and the main singlechip system and between the RFID electronic tag and the standby singlechip system and is used for controlling the connection and disconnection between the RFID electronic tag and the main singlechip system and between the RFID electronic tag and the standby singlechip system; the input end of the single chip fault detection circuit is connected with the output end of the main single chip system and is used for detecting whether the main single chip system has a fault or not, the output end of the single chip fault detection circuit is respectively connected with the first switch switching circuit, the second switch switching circuit, the third switch switching circuit and the standby single chip system and is used for controlling the switching states of the first switch switching circuit, the second switch switching circuit and the third switch switching circuit and outputting a fault signal to the standby single chip system to trigger the standby single chip system to be started, the standby single chip system is used for detecting an alarm signal of the single chip fault detection circuit and an instruction signal of the instruction input unit, and when the standby single chip system simultaneously detects the alarm signal of the single chip fault detection circuit and the instruction signal of the instruction input unit, the standby single chip system is allowed to output a control signal to the motor driving module, controlling the working state of the insulin pump; the blood sugar collecting device is used for transmitting the detected blood sugar concentration of a human body to the main singlechip system or the standby singlechip system, the main singlechip system or the standby singlechip system is used for receiving the blood sugar concentration of the human body detected by the blood sugar collecting device, automatically adjusting the injection amount of insulin according to the blood sugar concentration of the human body, and transmitting the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the RFID electronic tag, the RFID electronic tag is used for transmitting the identity information of the human body, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the upper computer through the RFID data collecting device, the upper computer is used for receiving the identity information of a patient, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to display, and realizes the, and alarm prompt is carried out when the blood sugar data of the patient is abnormal and the singlechip fails.
The single chip microcomputer fault detection circuit comprises a field effect transistor Q1, a field effect transistor Q2 and a field effect transistor Q3, wherein the grid electrode of the field effect transistor Q1 is electrically connected with a second output port of a main single chip microcomputer system through a resistor R2, the source electrode of the field effect transistor Q1 is grounded, the drain electrode of the field effect transistor Q1 is electrically connected with the grid electrode of a field effect transistor Q3 through a resistor R5, the grid electrode of the field effect transistor Q2 is electrically connected with a fourth output port of the main single chip microcomputer system through a resistor R4, the source electrode of the field effect transistor Q2 is grounded, the drain electrode of the field effect transistor Q2 is electrically connected with the grid electrode of a field effect transistor Q3 through a resistor R6, the grid electrode of the field effect transistor Q3 is electrically connected with a first output port of the main single chip microcomputer system through a resistor R1, the grid electrode of the field effect transistor Q3 is electrically connected with a third output port of the main single chip microcomputer system through a resistor R3, the grid of the field-effect transistor Q3 is electrically connected with one end of a capacitor C1, the other end of the capacitor C1 is grounded, the source of the field-effect transistor Q3 is connected with one end of a coil of a relay K1, the other end of the coil of a relay K1 is grounded, the drain of the field-effect transistor Q3 is electrically connected with one end of a resistor R8, and the other end of the resistor R8 is electrically connected with a power supply positive electrode; one end of a contact of the relay K1 is connected with the input end of the standby single-chip microcomputer system, and the other end of the contact of the relay K1 is connected with the positive pole of a power supply or grounded; the first switch switching circuit comprises a normally open contact and a normally closed contact of the relay K1 or other relays controlled by the relay K1; the second switch switching circuit comprises a normally open contact and a normally closed contact of the relay K1 or other relays controlled by the relay K1; the third switch switching circuit includes a normally open contact and a normally closed contact of relay K1 or other relay controlled by relay K1. The switch switching circuit can also adopt a switch tube, a field effect tube and the like, at the moment, the source electrode of the field effect tube Q3 is directly grounded, the drain electrode of the field effect tube Q3 is respectively and electrically connected with one end of a resistor R8 and one end of a resistor R9, and the other end of the resistor R8 is electrically connected with a power supply positive electrode; the other end of the resistor R9 is grounded, and the drain of the field effect transistor Q3 is connected with the switching tube and the base of the field effect transistor to control the on-off of each channel.
The output end of the single chip microcomputer fault detection circuit is connected with an alarm device and used for giving an alarm prompt when a main single chip microcomputer system fails; the alarm device adopts a sound alarm device or/and a light alarm device.
The alarm device is controlled by a relay K1.
The output end of the standby single chip microcomputer system is connected with an alarm device and used for giving an alarm prompt when the main single chip microcomputer system fails; the alarm device adopts a sound alarm device or/and a light alarm device.
The instruction input unit adopts a key or a touch screen. The RFID electronic tag is connected with a display screen.
The RFID data acquisition device comprises an MCU module, a wireless receiving module and an upper computer communication interface, wherein the MCU module realizes wireless communication with the RFID electronic tag through the wireless receiving module, and the MCU module realizes communication with an upper computer through the upper computer communication interface; and the upper computer communication interface adopts an R232 bus interface circuit or an RS485 bus interface circuit.
RS485 bus interface circuit includes RS485 chip U1 and MOS pipe, and RO port, DI port of RS485 chip U1 are connected with the RX serial ports and the TX serial ports of MCU module respectively, the RO port of RS485 chip U1 is connected with a power supply positive VCC through resistance R23, RS485 chip U1's RX serial ports and TX serial ports
Figure BDA0002849955020000041
The port and the DE port are both connected with the drain electrode of an MOS tube Q4, the drain electrode of the MOS tube is connected with the anode of a power supply through a resistor R14, the source electrode of the MOS tube is grounded, the grid electrode of the MOS tube is connected with the DI port of an RS485 chip U1 through a resistor R15, the VCC port of the RS485 chip U1 is connected with the anode of the power supply, the GND port of an RS485 chip U1 is grounded, and the A port and the B port of an RS485 chip U1 are respectively and electrically connected with a connecting port; the B port of the RS485 chip U1 is respectively connected with one end of a resistor R16, one end of a TVS tube D4 and one end of a resistor R20, and the B port of the resistor R16The other end of the TVS tube D4 is grounded, the other end of the resistor R20 is connected with an RS485_ B port of the connection port, an A port of an RS485 chip U1 is respectively connected with one end of a resistor R17, one end of a TVS tube D2 and one end of a resistor R19, the other end of a resistor R17 and the other end of a TVS tube D2 are connected with the anode of a power supply, the other end of the resistor R19 is connected with an RS485_ A port of the connection port, a TVS tube D3 is connected between the A port and the B port of the RS485 chip U1, and a resistor R21 is connected between the RS485_ A port and the RS485_ B port of the connection port; the B port of the RS485 chip U1 is connected with one end of a capacitor C12, the other end of the capacitor C12 is grounded, the A port of the RS485 chip U1 is connected with one end of a capacitor C14, the other end of the capacitor C14 is grounded, and a capacitor C13 is connected between the RS485_ A port and the RS485_ B port of the connection port.
The utility model provides a monitoring control system of intelligence insulin pump based on RFID, includes RFID data collection system, host computer and the monitoring control device of foretell intelligence insulin pump, and blood sugar collection system is used for transmitting the human blood sugar concentration who detects for main singlechip system or reserve singlechip system, main singlechip system or reserve singlechip system are used for receiving the human blood sugar concentration that blood sugar collection system detected, according to human blood sugar concentration automatic adjustment insulin's injection volume to send the human blood sugar concentration that blood sugar collection system detected and the alarm signal of singlechip fault detection circuit to RFID electronic tags, RFID electronic tags is used for transmitting human identity information, the human blood sugar concentration that blood sugar collection system detected and the alarm signal of singlechip fault detection circuit for the host computer through RFID data collection system, the host computer is used for receiving patient's identity information, the monitoring control device of foretell insulin pump, and blood sugar collection system is used for receiving the human blood sugar concentration of human, The blood glucose concentration of the human body detected by the blood glucose collecting device and the alarm signal of the single chip microcomputer fault detection circuit are displayed, so that the real-time monitoring of the blood glucose data of each patient and the real-time monitoring of the fault of the single chip microcomputer are realized, and the alarm prompt is carried out when the blood glucose data of the patient are abnormal and the fault of the single chip microcomputer occurs.
The RFID data acquisition device comprises an MCU module, a wireless receiving module and an upper computer communication interface, the MCU module realizes wireless communication with the RFID electronic tag through the wireless receiving module, and the MCU module is connected with the upper computer through the upper computer communication interfaceThe host computer realizes communication; the upper computer communication interface adopts an R232 bus interface circuit or an RS485 bus interface circuit; RS485 bus interface circuit includes RS485 chip U1 and MOS pipe, and RO port, DI port of RS485 chip U1 are connected with the RX serial ports and the TX serial ports of MCU module respectively, the RO port of RS485 chip U1 is connected with a power supply positive VCC through resistance R23, RS485 chip U1's RX serial ports and TX serial ports
Figure BDA0002849955020000061
The port and the DE port are both connected with the drain electrode of an MOS tube Q4, the drain electrode of the MOS tube is connected with the anode of a power supply through a resistor R14, the source electrode of the MOS tube is grounded, the grid electrode of the MOS tube is connected with the DI port of an RS485 chip U1 through a resistor R15, the VCC port of the RS485 chip U1 is connected with the anode of the power supply, the GND port of an RS485 chip U1 is grounded, and the A port and the B port of an RS485 chip U1 are respectively and electrically connected with a connecting port; a B port of an RS485 chip U1 is connected with one end of a resistor R16, one end of a TVS tube D4 and one end of a resistor R20 respectively, the other end of the resistor R16 and the other end of the TVS tube D4 are grounded, the other end of a resistor R20 is connected with an RS485_ B port of a connection port, an A port of an RS485 chip U1 is connected with one end of a resistor R17, one end of a TVS tube D2 and one end of a resistor R19 respectively, the other end of a resistor R17 and the other end of the TVS tube D2 are connected with a power supply anode, the other end of a resistor R19 is connected with an RS485_ A port of the connection port, a TVS tube D3 is connected between the A port and the B port of the RS485 chip U1, and a resistor R21 is connected between the RS485_ A port and the RS485_ B port; the B port of the RS485 chip U1 is connected with one end of a capacitor C12, the other end of the capacitor C12 is grounded, the A port of the RS485 chip U1 is connected with one end of a capacitor C14, the other end of the capacitor C14 is grounded, and a capacitor C13 is connected between the RS485_ A port of the connection port and the RS485_ B port; the R232 bus interface circuit adopts MAX232 chip.
The invention has the advantages that: because this intelligent insulin pump's monitoring control device is equipped with main singlechip system and reserve singlechip system and singlechip fault detection circuit, when singlechip fault detection circuit monitored main singlechip system and damaged, then can trigger reserve singlechip system work, the security is high, and can realize hardware fault detection and warning suggestion.
The blood sugar collecting device is used for transmitting the detected blood sugar concentration of the human body to the main singlechip system or the standby singlechip system, the main singlechip system or the standby singlechip system is used for receiving the blood sugar concentration of the human body detected by the blood sugar collecting device, automatically adjusting the injection amount of insulin according to the blood sugar concentration of the human body, and transmitting the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the RFID electronic tag, the RFID electronic tag is used for transmitting the identity information of the human body, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the upper computer through the RFID data collecting device, the upper computer is used for receiving the identity information of the patient, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to display, and realizes the, and alarm prompt is carried out when the blood sugar data of the patient is abnormal and the singlechip fails. The blood sugar of the human body is collected and monitored in real time through the RFID technology.
Drawings
FIG. 1 is a schematic block diagram of a first embodiment of a monitoring control system of an intelligent insulin pump according to the present invention;
FIG. 2 is a schematic block diagram of a second embodiment of the monitoring control system of the intelligent insulin pump of the present invention;
FIG. 3 is a circuit diagram of the single chip microcomputer fault detection circuit of the present invention;
fig. 4 is a schematic block diagram of the RFID data acquisition device of the present invention.
Detailed Description
Referring to fig. 1 to 4, a monitoring control device of an intelligent insulin pump includes a power supply, a main single chip microcomputer system, a standby single chip microcomputer system, a single chip microcomputer fault detection circuit, an instruction input unit, a blood sugar collection device, a motor drive module and an RFID electronic tag, wherein the power supply is used for supplying power to the whole device, the instruction input unit is used for transmitting an instruction signal of a user to the main single chip microcomputer system and the standby single chip microcomputer system, and the main single chip microcomputer system is used for outputting a control signal to the motor drive module according to the instruction signal of the instruction input unit and controlling the working state of the insulin pump; a first switch switching circuit is arranged between the blood sugar collecting device and the main singlechip system and between the blood sugar collecting device and the standby singlechip system and is used for controlling the on-off between the blood sugar collecting device and the main singlechip system and between the blood sugar collecting device and the standby singlechip system; a second switch switching circuit is arranged between the motor driving module and the main single chip microcomputer system and between the motor driving module and the standby single chip microcomputer system and is used for controlling the on-off between the motor driving module and the main single chip microcomputer system and between the motor driving module and the standby single chip microcomputer system; a third switch switching circuit is arranged between the RFID electronic tag and the main singlechip system and between the RFID electronic tag and the standby singlechip system and is used for controlling the connection and disconnection between the RFID electronic tag and the main singlechip system and between the RFID electronic tag and the standby singlechip system; the input end of the single chip fault detection circuit is connected with the output end of the main single chip system and is used for detecting whether the main single chip system has a fault or not, the output end of the single chip fault detection circuit is respectively connected with the first switch switching circuit, the second switch switching circuit, the third switch switching circuit and the standby single chip system and is used for controlling the switching states of the first switch switching circuit, the second switch switching circuit and the third switch switching circuit and outputting a fault signal to the standby single chip system to trigger the standby single chip system to be started, the standby single chip system is used for detecting an alarm signal of the single chip fault detection circuit and an instruction signal of the instruction input unit, and when the standby single chip system simultaneously detects the alarm signal of the single chip fault detection circuit and the instruction signal of the instruction input unit, the standby single chip system is allowed to output a control signal to the motor driving module, controlling the working state of the insulin pump; the blood sugar collecting device is used for transmitting the detected blood sugar concentration of a human body to the main singlechip system or the standby singlechip system, the main singlechip system or the standby singlechip system is used for receiving the blood sugar concentration of the human body detected by the blood sugar collecting device, automatically adjusting the injection amount of insulin according to the blood sugar concentration of the human body, and transmitting the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the RFID electronic tag, the RFID electronic tag is used for transmitting the identity information of the human body, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the upper computer through the RFID data collecting device, the upper computer is used for receiving the identity information of a patient, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to display, and realizes the, and alarm prompt is carried out when the blood sugar data of the patient is abnormal and the singlechip fails.
The single chip microcomputer fault detection circuit comprises a field effect transistor Q1, a field effect transistor Q2 and a field effect transistor Q3, wherein the grid electrode of the field effect transistor Q1 is electrically connected with a second output port of a main single chip microcomputer system through a resistor R2, the source electrode of the field effect transistor Q1 is grounded, the drain electrode of the field effect transistor Q1 is electrically connected with the grid electrode of a field effect transistor Q3 through a resistor R5, the grid electrode of the field effect transistor Q2 is electrically connected with a fourth output port of the main single chip microcomputer system through a resistor R4, the source electrode of the field effect transistor Q2 is grounded, the drain electrode of the field effect transistor Q2 is electrically connected with the grid electrode of a field effect transistor Q3 through a resistor R6, the grid electrode of the field effect transistor Q3 is electrically connected with a first output port of the main single chip microcomputer system through a resistor R1, the grid electrode of the field effect transistor Q3 is electrically connected with a third output port of the main single chip microcomputer system through a resistor R3, the grid of the field-effect transistor Q3 is electrically connected with one end of a capacitor C1, the other end of the capacitor C1 is grounded, the source of the field-effect transistor Q3 is connected with one end of a coil of a relay K1, the other end of the coil of a relay K1 is grounded, the drain of the field-effect transistor Q3 is electrically connected with one end of a resistor R8, and the other end of the resistor R8 is electrically connected with a power supply positive electrode; one end of a contact of the relay K1 is connected with the input end of the standby single-chip microcomputer system, and the other end of the contact of the relay K1 is connected with the positive pole of a power supply or grounded; the first switch switching circuit comprises a normally open contact and a normally closed contact of the relay K1 or other relays controlled by the relay K1; the second switch switching circuit comprises a normally open contact and a normally closed contact of the relay K1 or other relays controlled by the relay K1; the third switch switching circuit includes a normally open contact and a normally closed contact of relay K1 or other relay controlled by relay K1. Of course, the switch switching circuit of the present invention is not limited to the above-mentioned embodiments, and the switch switching circuit of the present invention may also adopt a switch tube, a field effect tube, etc., at this time, the source of the field effect tube Q3 is directly grounded, the drain of the field effect tube Q3 is electrically connected with one end of the resistor R8 and one end of the resistor R9, respectively, and the other end of the resistor R8 is electrically connected with a power supply positive electrode; the other end of the resistor R9 is grounded, and the drain of the field effect transistor Q3 is connected with the switching tube and the base of the field effect transistor to control the on-off of each channel.
Referring to fig. 2, the output end of the single chip microcomputer fault detection circuit is connected with an alarm device for giving an alarm prompt when a main single chip microcomputer system fails; the alarm device adopts a sound alarm device or/and a light alarm device.
The alarm device is controlled by a relay K1.
Referring to fig. 1, the output end of the standby single chip microcomputer system is connected with an alarm device for giving an alarm prompt when the main single chip microcomputer system fails; the alarm device adopts a sound alarm device or/and a light alarm device.
The instruction input unit adopts a key or a touch screen. The RFID electronic tag is connected with a display screen.
The RFID data acquisition device comprises an MCU module, a wireless receiving module and an upper computer communication interface, wherein the MCU module realizes wireless communication with the RFID electronic tag through the wireless receiving module, and the MCU module realizes communication with an upper computer through the upper computer communication interface; and the upper computer communication interface adopts an R232 bus interface circuit or an RS485 bus interface circuit.
RS485 bus interface circuit includes RS485 chip U1 and MOS pipe, and RO port, DI port of RS485 chip U1 are connected with the RX serial ports and the TX serial ports of MCU module respectively, the RO port of RS485 chip U1 is connected with a power supply positive VCC through resistance R23, RS485 chip U1's RX serial ports and TX serial ports
Figure BDA0002849955020000101
The port and DE port are connected with the drain of MOS transistor Q4, the drain of MOS transistor is connected with the positive power supply via resistor R14The source electrode of the MOS tube is grounded, the grid electrode of the MOS tube is connected with the DI port of the RS485 chip U1 through a resistor R15, the VCC port of the RS485 chip U1 is connected with the positive electrode of a power supply, the GND port of the RS485 chip U1 is grounded, and the A port and the B port of the RS485 chip U1 are respectively and electrically connected with a connecting port; a B port of an RS485 chip U1 is connected with one end of a resistor R16, one end of a TVS tube D4 and one end of a resistor R20 respectively, the other end of the resistor R16 and the other end of the TVS tube D4 are grounded, the other end of a resistor R20 is connected with an RS485_ B port of a connection port, an A port of an RS485 chip U1 is connected with one end of a resistor R17, one end of a TVS tube D2 and one end of a resistor R19 respectively, the other end of a resistor R17 and the other end of the TVS tube D2 are connected with a power supply anode, the other end of a resistor R19 is connected with an RS485_ A port of the connection port, a TVS tube D3 is connected between the A port and the B port of the RS485 chip U1, and a resistor R21 is connected between the RS485_ A port and the RS485_ B port; the B port of the RS485 chip U1 is connected with one end of a capacitor C12, the other end of the capacitor C12 is grounded, the A port of the RS485 chip U1 is connected with one end of a capacitor C14, the other end of the capacitor C14 is grounded, and a capacitor C13 is connected between the RS485_ A port and the RS485_ B port of the connection port.
The utility model provides a monitoring control system of intelligence insulin pump based on RFID, includes RFID data collection system, host computer and the monitoring control device of above-mentioned intelligence insulin pump, and blood sugar collection system is used for transmitting the human blood sugar concentration who detects for main singlechip system or reserve singlechip system, main singlechip system or reserve singlechip system are used for receiving the human blood sugar concentration that blood sugar collection system detected, according to the injection volume of human blood sugar concentration automatic adjustment insulin to send the human blood sugar concentration that blood sugar collection system detected and the alarm signal of singlechip fault detection circuit to RFID electronic tags, RFID electronic tags is used for transmitting human identity information, the human blood sugar concentration that blood sugar collection system detected and the alarm signal of singlechip fault detection circuit for the host computer through RFID data collection system, the host computer is used for receiving patient's identity information, The blood glucose concentration of the human body detected by the blood glucose collecting device and the alarm signal of the single chip microcomputer fault detection circuit are displayed, so that the real-time monitoring of the blood glucose data of each patient and the real-time monitoring of the fault of the single chip microcomputer are realized, and the alarm prompt is carried out when the blood glucose data of the patient are abnormal and the fault of the single chip microcomputer occurs.
The RFID data acquisition device comprises an MCU module, a wireless receiving module and an upper computer communication interface, wherein the MCU module realizes wireless communication with the RFID electronic tag through the wireless receiving module, and the MCU module realizes communication with an upper computer through the upper computer communication interface; the upper computer communication interface adopts an R232 bus interface circuit or an RS485 bus interface circuit; RS485 bus interface circuit includes RS485 chip U1 and MOS pipe, and RO port, DI port of RS485 chip U1 are connected with the RX serial ports and the TX serial ports of MCU module respectively, the RO port of RS485 chip U1 is connected with a power supply positive VCC through resistance R23, RS485 chip U1's RX serial ports and TX serial ports
Figure BDA0002849955020000111
The port and the DE port are both connected with the drain electrode of an MOS tube Q4, the drain electrode of the MOS tube is connected with the anode of a power supply through a resistor R14, the source electrode of the MOS tube is grounded, the grid electrode of the MOS tube is connected with the DI port of an RS485 chip U1 through a resistor R15, the VCC port of the RS485 chip U1 is connected with the anode of the power supply, the GND port of an RS485 chip U1 is grounded, and the A port and the B port of an RS485 chip U1 are respectively and electrically connected with a connecting port; a B port of an RS485 chip U1 is connected with one end of a resistor R16, one end of a TVS tube D4 and one end of a resistor R20 respectively, the other end of the resistor R16 and the other end of the TVS tube D4 are grounded, the other end of a resistor R20 is connected with an RS485_ B port of a connection port, an A port of an RS485 chip U1 is connected with one end of a resistor R17, one end of a TVS tube D2 and one end of a resistor R19 respectively, the other end of a resistor R17 and the other end of the TVS tube D2 are connected with a power supply anode, the other end of a resistor R19 is connected with an RS485_ A port of the connection port, a TVS tube D3 is connected between the A port and the B port of the RS485 chip U1, and a resistor R21 is connected between the RS485_ A port and the RS485_ B port; the B port of the RS485 chip U1 is connected with one end of a capacitor C12, the other end of the capacitor C12 is grounded, the A port of the RS485 chip U1 is connected with one end of a capacitor C14, the other end of the capacitor C14 is grounded, and a capacitor C13 is connected between the RS485_ A port of the connection port and the RS485_ B port; the R232 bus interface circuit adopts MAX232 chip.
The working principle of the invention is introduced:
when the system works normally, the output end P1 of the main singlechip system outputs high level, and the control line does not pull down the AUX voltage; the output end P2 of the main singlechip system outputs low level, and outputs high level after Q1 reversal, so that AUX voltage cannot be pulled down; the output end P3 of the main singlechip system outputs high level, and the control line does not pull the AUX voltage down; the output end P4 of the main singlechip system outputs low level, and outputs high level after Q2 reversal, so that AUX voltage cannot be pulled down; the voltage of the AUX point is pulled to be high level through a pull-up resistor R7, so that Q3 is conducted, a relay K1 is electrified, the blood sugar collecting device and the main singlechip system are connected, and the blood sugar collecting device and the standby singlechip system are disconnected; a passage is formed between the motor driving module and the main singlechip system, and an open circuit is formed between the motor driving module and the standby singlechip system; the RFID electronic tag and the main singlechip system are connected, and the RFID electronic tag and the standby singlechip system are disconnected. When the main singlechip system works abnormally (is damaged), 4 control lines cannot maintain preset states (high level, low level, high level and low level), when P1 or P3 outputs low level, AUX is directly low level, Q3 is turned off, and a relay K1 is powered off, so that the blood sugar collecting device and the main singlechip system are in open circuit, and the blood sugar collecting device and the standby singlechip system are in open circuit; the motor driving module and the main singlechip system are in open circuit, and the motor driving module and the standby singlechip system are in access; the RFID electronic tag and the main singlechip system are in open circuit, and the RFID electronic tag and the standby singlechip system are in access.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and it is apparent that those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

1. The utility model provides a monitoring control device of intelligence insulin pump which characterized in that: the system comprises a power supply, a main singlechip system, a standby singlechip system, a singlechip fault detection circuit, an instruction input unit, a blood sugar acquisition device, a motor drive module and an RFID electronic tag, wherein the power supply is used for supplying power to the whole device; a first switch switching circuit is arranged between the blood sugar collecting device and the main singlechip system and between the blood sugar collecting device and the standby singlechip system and is used for controlling the on-off between the blood sugar collecting device and the main singlechip system and between the blood sugar collecting device and the standby singlechip system; a second switch switching circuit is arranged between the motor driving module and the main single chip microcomputer system and between the motor driving module and the standby single chip microcomputer system and is used for controlling the on-off between the motor driving module and the main single chip microcomputer system and between the motor driving module and the standby single chip microcomputer system; a third switch switching circuit is arranged between the RFID electronic tag and the main singlechip system and between the RFID electronic tag and the standby singlechip system and is used for controlling the connection and disconnection between the RFID electronic tag and the main singlechip system and between the RFID electronic tag and the standby singlechip system; the input end of the single chip fault detection circuit is connected with the output end of the main single chip system and is used for detecting whether the main single chip system has a fault or not, the output end of the single chip fault detection circuit is respectively connected with the first switch switching circuit, the second switch switching circuit, the third switch switching circuit and the standby single chip system and is used for controlling the switching states of the first switch switching circuit, the second switch switching circuit and the third switch switching circuit and outputting a fault signal to the standby single chip system to trigger the standby single chip system to be started, the standby single chip system is used for detecting an alarm signal of the single chip fault detection circuit and an instruction signal of the instruction input unit, and when the standby single chip system simultaneously detects the alarm signal of the single chip fault detection circuit and the instruction signal of the instruction input unit, the standby single chip system is allowed to output a control signal to the motor driving module, controlling the working state of the insulin pump; the blood sugar collecting device is used for transmitting the detected blood sugar concentration of a human body to the main singlechip system or the standby singlechip system, the main singlechip system or the standby singlechip system is used for receiving the blood sugar concentration of the human body detected by the blood sugar collecting device, automatically adjusting the injection amount of insulin according to the blood sugar concentration of the human body, and transmitting the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the RFID electronic tag, the RFID electronic tag is used for transmitting the identity information of the human body, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to the upper computer through the RFID data collecting device, the upper computer is used for receiving the identity information of a patient, the blood sugar concentration of the human body detected by the blood sugar collecting device and the alarm signal of the singlechip fault detection circuit to display, and realizes the, and alarm prompt is carried out when the blood sugar data of the patient is abnormal and the singlechip fails.
2. The monitoring and control device of intelligent insulin pump according to claim 1, characterized in that: the single chip microcomputer fault detection circuit comprises a field effect transistor Q1, a field effect transistor Q2 and a field effect transistor Q3, wherein the grid electrode of the field effect transistor Q1 is electrically connected with a second output port of a main single chip microcomputer system through a resistor R2, the source electrode of the field effect transistor Q1 is grounded, the drain electrode of the field effect transistor Q1 is electrically connected with the grid electrode of a field effect transistor Q3 through a resistor R5, the grid electrode of the field effect transistor Q2 is electrically connected with a fourth output port of the main single chip microcomputer system through a resistor R4, the source electrode of the field effect transistor Q2 is grounded, the drain electrode of the field effect transistor Q2 is electrically connected with the grid electrode of a field effect transistor Q3 through a resistor R6, the grid electrode of the field effect transistor Q3 is electrically connected with a first output port of the main single chip microcomputer system through a resistor R1, the grid electrode of the field effect transistor Q3 is electrically connected with a third output port of the main single chip microcomputer system through a resistor R3, the grid of the field-effect transistor Q3 is electrically connected with one end of a capacitor C1, the other end of the capacitor C1 is grounded, the source of the field-effect transistor Q3 is connected with one end of a coil of a relay K1, the other end of the coil of a relay K1 is grounded, the drain of the field-effect transistor Q3 is electrically connected with one end of a resistor R8, and the other end of the resistor R8 is electrically connected with a power supply positive electrode; one end of a contact of the relay K1 is connected with the input end of the standby single-chip microcomputer system, and the other end of the contact of the relay K1 is connected with the positive pole of a power supply or grounded; the first switch switching circuit comprises a normally open contact and a normally closed contact of the relay K1 or other relays controlled by the relay K1; the second switch switching circuit comprises a normally open contact and a normally closed contact of the relay K1 or other relays controlled by the relay K1; the third switch switching circuit includes a normally open contact and a normally closed contact of relay K1 or other relay controlled by relay K1.
3. The intelligent insulin pump monitoring and controlling device as claimed in claim 2, wherein: the output end of the single chip microcomputer fault detection circuit is connected with an alarm device and used for giving an alarm prompt when a main single chip microcomputer system fails; the alarm device adopts a sound alarm device or/and a light alarm device.
4. The intelligent insulin pump monitoring and controlling device as claimed in claim 3, wherein: the alarm device is controlled by a relay K1.
5. The monitoring and control device of intelligent insulin pump according to claim 1, characterized in that: the output end of the standby single chip microcomputer system is connected with an alarm device and used for giving an alarm prompt when the main single chip microcomputer system fails; the alarm device adopts a sound alarm device or/and a light alarm device.
6. The monitoring and control device of intelligent insulin pump according to claim 1, characterized in that: the instruction input unit adopts a key or a touch screen; the RFID electronic tag is connected with a display screen.
7. The monitoring and control device of intelligent insulin pump according to claim 1, characterized in that: the RFID data acquisition device comprises an MCU module, a wireless receiving module and an upper computer communication interface, wherein the MCU module realizes wireless communication with the RFID electronic tag through the wireless receiving module, and the MCU module realizes communication with an upper computer through the upper computer communication interface; and the upper computer communication interface adopts an R232 bus interface circuit or an RS485 bus interface circuit.
8. The intelligent insulin pump monitoring and controlling device as claimed in claim 7, wherein: the RS485 bus interface circuit comprises an RS485 chip U1 and an MOS tube, an RO port and a DI port of the RS485 chip U1 are respectively connected with an RX serial port and a TX serial port of an MCU module, the RO port of the RS485 chip U1 is connected with a power supply anode VCC through a resistor R23, an RE port and a DE port of the RS485 chip U1 are both connected with a drain electrode of an MOS tube Q4, a drain electrode of the MOS tube is connected with a power supply anode through a resistor R14, a source electrode of the MOS tube is grounded, a grid electrode of the MOS tube is connected with a DI port of an RS485 chip U1 through a resistor R15, a VCC port of an RS485 chip U1 is connected with the power supply anode, a GND port of an RS485 chip U1 is grounded, and an A port and a B port of an RS485 chip U1 are respectively and electrically connected with a connecting; a B port of an RS485 chip U1 is respectively connected with one end of a resistor R16, one end of a TVS tube D4 and one end of a resistor R20, the other end of the resistor R16 and the other end of the TVS tube D4 are grounded, the other end of a resistor R20 is connected with an RS485-B port of a connection port, an A port of an RS485 chip U1 is respectively connected with one end of a resistor R17, one end of a TVS tube D2 and one end of a resistor R19, the other end of a resistor R17 and the other end of the TVS tube D2 are connected with a power supply anode, the other end of a resistor R19 is connected with an RS485-A port of the connection port, a TVS tube D3 is connected between the A port and the B port of the RS485 chip U1, and a resistor R21 is connected between the RS485-A port and the RS485-B port; the B port of the RS485 chip U1 is connected with one end of a capacitor C12, the other end of the capacitor C12 is grounded, the A port of the RS485 chip U1 is connected with one end of a capacitor C14, the other end of the capacitor C14 is grounded, and a capacitor C13 is connected between the RS485-A port of the connection port and the RS485-B port.
9. The utility model provides a monitoring control system of intelligent insulin pump based on RFID which characterized in that: including RFID data acquisition device, host computer and any one of claims 1 to 8 intelligent insulin pump's monitor control device, blood sugar collection device is used for transmitting the human blood sugar concentration that detects for main singlechip system or reserve singlechip system, main singlechip system or reserve singlechip system are used for receiving the human blood sugar concentration that blood sugar collection device detected, according to human blood sugar concentration automatic adjustment insulin's injection volume to send the human blood sugar concentration that blood sugar collection device detected and the alarm signal of singlechip fault detection circuit to RFID electronic tags, RFID electronic tags is used for transmitting the human blood sugar concentration that human identity information, blood sugar collection device detected and the alarm signal of singlechip fault detection circuit for the host computer through RFID data acquisition device, the host computer is used for receiving patient's identity information, the human blood sugar concentration that blood sugar collection device detected and the alarm signal of singlechip fault detection circuit and carries out And displaying, namely realizing real-time monitoring of blood glucose data of each patient and real-time monitoring of faults of the single chip microcomputer, and giving an alarm when the blood glucose data of the patient is abnormal and the fault of the single chip microcomputer occurs.
10. The system of claim 9, wherein: the RFID data acquisition device comprises an MCU module, a wireless receiving module and an upper computer communication interface, wherein the MCU module realizes wireless communication with the RFID electronic tag through the wireless receiving module, and the MCU module realizes communication with an upper computer through the upper computer communication interface; the upper computer communication interface adopts an R232 bus interface circuit or an RS485 bus interface circuit; RS485 bus interface circuit includes RS485 chip U1 and MOS pipe, and RO port, DI port of RS485 chip U1 are connected with the RX serial ports and the TX serial ports of MCU module respectively, the RO port of RS485 chip U1 is connected with a power supply positive VCC through resistance R23, RS485 chip U1's RX serial ports and TX serial ports
Figure FDA0002849955010000051
The port and the DE port are both connected with the drain electrode of an MOS tube Q4, the drain electrode of the MOS tube is connected with the anode of a power supply through a resistor R14, the source electrode of the MOS tube is grounded, and the grid electrode of the MOS tube is connected with the DI port of an RS485 chip U1 through a resistor R15The VCC port of the RS485 chip U1 is connected with the anode of a power supply, the GND port of the RS485 chip U1 is grounded, and the A port and the B port of the RS485 chip U1 are respectively and electrically connected with the connecting port; a B port of an RS485 chip U1 is respectively connected with one end of a resistor R16, one end of a TVS tube D4 and one end of a resistor R20, the other end of the resistor R16 and the other end of the TVS tube D4 are grounded, the other end of a resistor R20 is connected with an RS485-B port of a connection port, an A port of an RS485 chip U1 is respectively connected with one end of a resistor R17, one end of a TVS tube D2 and one end of a resistor R19, the other end of a resistor R17 and the other end of the TVS tube D2 are connected with a power supply anode, the other end of a resistor R19 is connected with an RS485-A port of the connection port, a TVS tube D3 is connected between the A port and the B port of the RS485 chip U1, and a resistor R21 is connected between the RS485-A port and the RS485-B port; the B port of the RS485 chip U1 is connected with one end of a capacitor C12, the other end of the capacitor C12 is grounded, the A port of the RS485 chip U1 is connected with one end of a capacitor C14, the other end of the capacitor C14 is grounded, and a capacitor C13 is connected between the RS485-A port of the connection port and the RS485-B port; the R232 bus interface circuit adopts MAX232 chip.
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