CN114323197A - Water level monitoring terminal - Google Patents

Abstract

The present invention provides a water level monitoring terminal, comprising: the main control module and the power supply of the water level monitoring terminal are respectively connected with the water immersion switch, the low-power wireless communication module and the water level monitoring module; the water logging switch sends a water logging signal to the main control module after monitoring water logging, the main control module receives the water logging signal, triggers the water level monitoring module to work, and sends water level information acquired by the water level monitoring module through the low-power wireless communication module; the two ends of the water level measuring capacitor are connected with the water level measuring chip, the main control chip is in communication connection with the water level measuring chip, the water level measuring capacitor is different in water immersion height, and corresponding capacitance values are different. The invention realizes the real-time monitoring of the water level, reduces the electric energy consumption and the monitoring cost by starting the water level monitoring mode when the accumulated water appears, is not easy to cause false alarm and missing report, has good accuracy and effectively protects the personal and property safety.

Description

water level monitoring terminal

technical field

The invention relates to the field of water level monitoring equipment, in particular to a water level monitoring terminal.

Background technique

In recent years, under the influence of extreme weather in my country, heavy rains have occurred frequently in various places, and the problem of urban waterlogging has become increasingly serious. In many cities, roads are flooded, tunnels and culverts are flooded and other serious situations during heavy rains. Under the circumstance that the urban drainage system cannot quickly solve the problem of waterlogging, it is very important to monitor the possible low-lying locations or areas that are prone to flooding. Through the monitoring results, the flooded areas can be dredged in time, and the owners can be notified in time. , to prevent the disaster from happening again.

At present, rainstorm warnings based on weather forecasts and manual inspections are used to monitor areas or locations prone to flooding. However, in the actual environment, due to the low accuracy of the weather forecast, the method of rainstorm warning through the weather forecast often has the problem of false alarms or omissions, and the monitoring effect is poor. However, the manual inspection method is expensive, and can only be inspected in a fixed time period or a short period of time, without real-time monitoring, unable to detect water level changes in time, and it is difficult to effectively reduce personal safety and property losses caused by flooding.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention proposes a water level monitoring terminal, which is provided with a water immersion switch, a water level monitoring module, and a low-power wireless communication module. The water level monitoring module monitors the water level, and sends the obtained water level information through the low-power wireless communication module, realizing real-time monitoring of the water level, and by turning on the water level monitoring method when there is water accumulation, it reduces the power consumption and reduces the energy consumption. The monitoring cost is not prone to false alarms and omissions, and the accuracy is good, which effectively protects personal and property safety.

In order to solve the above problem, a technical solution adopted by the present invention is: a water level monitoring terminal, the water level monitoring terminal includes: the water level monitoring terminal includes: a main control module, a flood switch, a low-power wireless communication module, a power supply and a water level monitoring module, wherein the main control module and the power supply are respectively connected with the water immersion switch, the low-power wireless communication module and the water level monitoring module; the water immersion switch sends a stagnant water signal after monitoring the stagnant water. the main control module, the main control module receives the water accumulation signal, triggers the water level monitoring module to work, and transmits the water level information obtained by the water level monitoring module through the low-power wireless communication module; the The water level monitoring module includes a water level measurement capacitor and a water level measurement chip. The main control module includes a main control chip. Both ends of the water level measurement capacitor are connected to the water level measurement chip. The main control chip communicates with the water level measurement chip. connection, wherein, the water level measurement capacitors have different immersion heights, and the corresponding capacitance values are different.

Further, the water level monitoring terminal further includes an input circuit, and the input circuit is respectively connected with the water immersion switch and the main control module.

Further, the input circuit includes a first field effect transistor, a first resistor, a first capacitor, a second resistor, a third resistor, a second capacitor, a second field effect transistor, a fourth resistor and a third capacitor, the The gate of the first field effect transistor is connected to the output end of the water immersion switch, the second end of the first resistor and the first end of the first capacitor, and the drain is connected to the main control chip and the first end of the first resistor , the source is connected to the first end of the second resistor and the first end of the third resistor, the second end of the first capacitor is connected to the second end of the second resistor and the second end of the second capacitor and the source of the second field effect transistor is connected to ground, the second end of the third resistor is connected to the first end of the second capacitor and the gate of the second field effect transistor, the second field effect The drain of the transistor is connected to the second end of the fourth resistor and the main control chip, the first end of the fourth resistor is connected to the main control chip, one end of the third capacitor is grounded, and the other end is connected to the main control chip. The main control chip is connected.

Further, the power supply includes a battery module and a power supply circuit, and the power supply circuit includes a water level monitoring module power supply circuit and a low-power wireless communication module power supply circuit, and the water level monitoring module power supply circuit is respectively connected with the water level monitoring module and the battery module. , the main control chip is connected, the power supply circuit of the low-power wireless communication module is connected with the battery module, the low-power wireless communication module, and the main control chip, and the main control chip controls the power supply to the water level monitoring module, Low-power wireless communication module power supply.

Further, the power supply circuit of the water level monitoring module includes a fifth resistor, a first triode, a third field effect transistor, and a sixth resistor. One end of the fifth resistor is connected to the main control chip, and the other end is connected to the first resistor. The base of a triode is connected, the emitter of the first triode is grounded, and the collector is connected to the gate of the third field effect transistor and the first end of the sixth resistor, and the sixth resistor is connected to the ground. The second end is connected to the battery module and the drain of the third field effect transistor, and the source of the third field effect transistor is connected to the water level measuring chip to supply power to the water level measuring chip.

Further, the water level monitoring terminal further includes a wired communication module, the wired communication module is connected to the main control chip, the power supply circuit further includes a wired communication module power supply circuit, and the wired communication module power supply circuit is respectively connected to the main control chip. The chip, the wired communication module and the battery module are connected, and the wired communication module is powered by the power supply circuit of the wired communication module.

Further, the water level monitoring module further includes a power output module, the power supply circuit further includes an output power circuit, and the output power circuit is respectively connected with the power output module, the battery module and the main control chip.

Further, the low-power wireless communication module power supply circuit includes a seventh resistor, an eighth resistor, a second transistor, a ninth resistor, a fourth field effect transistor, a tenth resistor, a fourth capacitor, and a fifth capacitor, The first end of the seventh resistor is connected to the main control chip, the second end is connected to the first end of the eighth resistor and the first end of the second transistor, and the second end of the eighth resistor is connected to the first end of the second transistor. The terminal is grounded, the emitter of the second transistor is grounded, and the collector is connected to the gate of the fourth field effect transistor and the first end of the ninth resistor, and the second end of the ninth resistor is connected to the the battery module, the first end of the tenth resistor and the drain of the fourth field effect transistor are connected, and the source of the fourth field effect transistor is connected to the second end of the tenth resistor and the first end of the fourth capacitor , the second end of the fourth capacitor is grounded, the first end of the fifth capacitor is connected to the first end of the fourth capacitor and the main control chip, and the second end is grounded.

Further, the water level monitoring terminal further includes a low-voltage detection module, the power supply circuit includes a low-voltage detection module power supply circuit, the low-voltage detection module is connected to the battery module, and the low-voltage detection module power supply circuit is respectively connected to the main controller. Chip, low voltage monitoring module, battery module connection.

Further, the water level monitoring terminal further includes a wake-up circuit, a power-on circuit, and a reset circuit, and the wake-up circuit, the power-on circuit, and the reset circuit are respectively connected with the main control chip and the low-power wireless communication module.

Compared with the prior art, the beneficial effect of the present invention is that: a water immersion switch, a water level monitoring module, and a low-power wireless communication module are provided, and the water immersion switch is used to detect accumulated water, and after the accumulated water is detected, the water level monitoring module monitors the water level. water level, and the acquired water level information is sent out through the low-power wireless communication module, realizing real-time monitoring of the water level, and by turning on the water level monitoring method when there is stagnant water, the power consumption is reduced, and the monitoring cost is reduced. It is prone to false alarms and omissions, and the accuracy is good, which effectively protects personal and property safety.

Description of drawings

1 is a structural diagram of an embodiment of a water level monitoring terminal according to the present invention;

2 is a structural diagram of another embodiment of the water level monitoring terminal of the present invention;

3 is a circuit diagram of an embodiment of a water level monitoring module in a water level monitoring terminal of the present invention;

4 is a circuit diagram of an embodiment of an input circuit in the water level monitoring terminal of the present invention;

5 is a circuit diagram of an embodiment of the power supply circuit of the water level monitoring module in the water level monitoring terminal of the present invention;

6 is a circuit diagram of an embodiment of a power supply circuit for a low-power wireless communication module in a water level monitoring terminal of the present invention;

7 is a circuit diagram of an embodiment of a power supply circuit of a wired communication module in a water level monitoring terminal of the present invention;

8 is a circuit diagram of an embodiment of an output power supply circuit in the water level monitoring terminal of the present invention;

9 is a circuit diagram of an embodiment of a wake-up circuit in the water level monitoring terminal of the present invention;

10 is a circuit diagram of an embodiment of a power-on circuit in the water level monitoring terminal of the present invention;

11 is a circuit diagram of an embodiment of a reset circuit in the water level monitoring terminal of the present invention;

12 is a circuit diagram of an embodiment of a power supply circuit for a medium and low voltage detection module of a water level monitoring terminal of the present invention;

13 is a circuit diagram of an embodiment of a level conversion circuit in the water level monitoring terminal of the present invention;

FIG. 14 is a circuit diagram of an embodiment of the main control chip in the water level monitoring terminal of the present invention.

In the figure: U2, main control chip; C1, water level measuring capacitor; Q1B, first field effect transistor; R87, first resistor; R45, second resistor; C4, first capacitor; R29, third resistor; C5, first resistor Two capacitors; Q1A, the second field effect transistor; R47, the fourth resistor; C1, the third capacitor; D1, the first diode; D4, the second diode; R38, the eleventh resistor; R18, the fifth Resistor; Q20, the first transistor; Q12, the third field effect transistor; R1, the sixth resistor; R97, the twelfth resistor; R78, the seventh resistor; R79, the eighth resistor; Q17, the second transistor ; R77, the ninth resistor; Q16, the fourth field effect transistor; R75, the tenth resistor; C52, the fourth capacitor; C53, the fifth capacitor; C54, the sixth capacitor; C55, the seventh capacitor; C56, the eighth capacitor ;C57, the ninth capacitor; R15, the thirteenth resistor; R16, the fourteenth resistor; Q3A, the fifth field effect transistor; R9, the fifteenth resistor; Q3B, the sixth field effect transistor; R10, the sixteenth resistor ; R17, the seventeenth resistor; C11, the tenth capacitor; U6, the voltage conversion chip; R98, the eighteenth resistor; R99, the nineteenth resistor; R100, the twentieth resistor; R101, the twenty-first resistor.

Detailed ways

The embodiments of the present application are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, the various embodiments of the present disclosure generally described and shown in the accompanying drawings herein can be combined with each other under the premise of not conflicting, and the structural components or functional modules therein can be arranged and arranged in various configurations. design. Therefore, the following detailed description of the embodiments of the disclosure provided in the accompanying drawings is not intended to limit the scope of the disclosure as claimed, but is merely representative of selected embodiments of the disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

Please refer to FIGS. 1 to 14, wherein, FIG. 1 is a structural diagram of an embodiment of a water level monitoring terminal of the present invention; FIG. 2 is a structural diagram of another embodiment of a water level monitoring terminal of the present invention; FIG. 3 is a water level monitoring terminal of the present invention. A circuit diagram of an embodiment of the water level monitoring module; FIG. 4 is a circuit diagram of an embodiment of the input circuit in the water level monitoring terminal of the present invention; FIG. 5 is a circuit diagram of an embodiment of the power supply circuit of the water level monitoring module in the water level monitoring terminal of the present invention; A circuit diagram of an embodiment of the power supply circuit of a low-power wireless communication module in the water level monitoring terminal of the present invention; FIG. 7 is a circuit diagram of an embodiment of a power supply circuit of a wired communication module in the water level monitoring terminal of the present invention; FIG. 8 is an output power supply in the water level monitoring terminal of the present invention. A circuit diagram of an embodiment of the circuit; Figure 9 is a circuit diagram of an embodiment of a wake-up circuit in a water level monitoring terminal of the present invention; Figure 10 is a circuit diagram of an embodiment of a power-on circuit in the water level monitoring terminal of the present invention; Figure 11 is a water level monitoring terminal of the present invention. A circuit diagram of an embodiment of the reset circuit; FIG. 12 is a circuit diagram of an embodiment of a power supply circuit for a medium and low voltage detection module in a water level monitoring terminal of the present invention; FIG. 13 is a circuit diagram of an embodiment of a level conversion circuit in the water level monitoring terminal of the present invention; A circuit diagram of an embodiment of the main control chip in the water level monitoring terminal of the present invention. The water level monitoring terminal of the present invention will be described in detail with reference to FIG. 1 to FIG. 14 .

In this embodiment, the water level monitoring terminal includes: a main control module, a water immersion switch, a low-power wireless communication module, a power supply and a water level monitoring module, the main control module, the power supply and the water immersion switch, a low-power wireless communication module, and The water level monitoring module is connected; after the water immersion switch detects the accumulated water, it sends the accumulated water signal to the main control module. The main control module receives the accumulated water signal, triggers the water level monitoring module to work, and sends the utilization water level through the low-power wireless communication module. The water level information obtained by the monitoring module; the water level monitoring module includes a water level measurement capacitor C1 and a water level measurement chip, and the main control module includes a main control chip U2. Both ends of the water level measurement capacitor C1 are connected to the water level measurement chip, and the main control chip U2 is connected to the water level measurement chip. Chip communication connection, wherein, the water level measuring capacitor C1 has different immersion heights, and the corresponding capacitance values are different. Specifically, the SCL pin and the SDA pin of the main control chip U2 are connected to the SCL pin and the SDA pin of the water level metering chip in a one-to-one correspondence. Two resistors are also arranged in the water level monitoring module, one end of the two resistors is connected to the working voltage pin VDD of the water level measuring chip, and the other end is connected to the SCL pin and SDA pin of the main control chip U2 respectively.

In this embodiment, the main control chip U2 is a single-chip microcomputer, and its model is HC32L170JATA. In other embodiments, the main control chip U2 can also be an STM32 or other types of single-chip microcomputers, and can also be an SOC, DSP, or other devices capable of processing received the water level information and send it to the device of the low-power wireless communication module.

In this embodiment, the low-power wireless communication module is an NB-IOT communication module. In other embodiments, the low-power wireless communication module may also be a ZigBee communication module, an LTE communication module, a CAT communication module, a Bluetooth communication module, lora communication modules and other communication modules capable of operating with low power consumption.

In this embodiment, the water level measuring capacitor C1 is composed of two metal mold electrodes. When the two electrodes are soaked in accumulated water, the soaking heights are different, and the resulting capacitances are different, so that the water level height is calculated. The model of the metering chip is MDC04, which is a special chip that calculates the capacitance value according to the difference in water level between the two electrodes of the water level measurement capacitor C1.

The water immersion switch is an externally installed water immersion sensor, which can be a carbon mold switch, a stainless steel switch, a photoelectric water level switch, etc. The switch is in a high impedance state in normal state, and becomes a low resistance state when it encounters water. After the main control chip U2 detects the change of the resistance value of the water immersion switch, it enters the working state from the low power consumption state and processes related work.

In a specific embodiment, when the water level monitoring module is in a normal state, the main control chip U2 controls its power supply to be in an off state, and when the flood switch is triggered, the main control chip U2 controls its power supply to be in a working state), and the water level monitoring module detects The value of the water level measuring capacitor C1, (the capacitance value is calculated by the water level measuring chip according to the water immersion height on the two electrodes of the water level measuring capacitor C1), and the main control chip U2 calculates the water level depth information according to the capacitance value (the main control chip U2 It communicates with the water level metering chip through the I2C line, calculates the water level depth according to different capacitances), and sends relevant data to the background through the NB-IOT communication module.

The water level monitoring terminal also includes an input circuit, and the input circuit is respectively connected with the water immersion switch, the main control module and the power supply. The number of input circuits may be multiple, and one of them is connected to the main control chip U2.

In other embodiments, multi-level flooding switches can also be provided, each flooding switch is connected to an input circuit, and the reliability of water level monitoring can be improved by setting up the cooperation of the multi-level flooding switches and the water level monitoring module.

In this embodiment, the input circuit includes a first field effect transistor Q1B, a first resistor R87, a first capacitor C4, a second resistor R45, a third resistor R29, a second capacitor C5, a second field effect transistor Q1A, a fourth Resistor R47 and third capacitor C1, the gate of the first field effect transistor Q1B is connected to the output end of the flood switch, the second end of the first resistor R87, and the first end of the first capacitor C4, and the drain is connected to the main control chip U2, the first end of the first resistor R87 is connected, the source is connected to the first end of the second resistor R45, the first end of the third resistor R29, the second end of the first capacitor C4 is connected to the second end of the second resistor R45 terminal, the second terminal of the second capacitor C5 and the source of the second field effect transistor Q1A are connected to the ground, and the second terminal of the third resistor R29 is connected to the first terminal of the second capacitor C5 and the source of the second field effect transistor Q1A. The gate is connected, the drain of the second field effect transistor Q1A is connected to the second end of the fourth resistor R47 and the main control chip U2, the first end of the fourth resistor R47 is connected to the main control chip U2, and one end of the third capacitor C1 Ground, and the other end is connected to the main control chip U2.

In this embodiment, the first field effect transistor Q1B and the second field effect transistor Q1A are packaged together, that is, the packaged field effect transistor AO7600 is used instead to realize the functions of the first field effect transistor Q1B and the second field effect transistor Q1A.

In other embodiments, two independent field effect transistors may also be provided respectively as the first field effect transistor Q1B and the second field effect transistor Q1A in the circuit.

In this embodiment, the first field effect transistor Q1B and the second field effect transistor Q1A are packaged together, that is, the packaged field effect transistor AO7600 is used instead to realize the functions of the first field effect transistor Q1B and the second field effect transistor Q1A.

In other embodiments, two independent field effect transistors may also be provided respectively as the first field effect transistor Q1B and the second field effect transistor Q1A in the circuit.

In one embodiment, the input circuit further includes a first diode D1, a second diode D4, and an eleventh resistor R38, wherein the cathode of the first diode D1 and the first diode of the second diode D4 are terminal and the output terminal of the flood switch, the second terminal of the second diode D4 is grounded, the anode of the first diode D1 is connected to the first terminal of the eleventh resistor R38, and the second terminal of the eleventh resistor R38 is connected to the ground. The terminal is connected to the gate of the first field effect transistor Q1B.

Among them, when the external input is in a normal state, IN1 is at a high level, the first field effect transistor Q1B and the second field effect transistor Q1A are turned off, IN1_PB14 is at a high level, and the main control chip U2 is in a normal state (when the external IN1 is at a high level, The main control chip U2 is in the low power consumption state, when the external input IN1 is low level, the main control chip U2 enters the working state from low power consumption, and processes its related signals), when the external input is low level, the input level of IN1 is pulled low , the first field effect transistor Q1B and the second field effect transistor Q1A are turned on, IN1_PB14 is low, and the main control chip U2 sends an alarm message to the background via the low-power wireless communication module. In the circuit, the second diode D4 is used for electrostatic protection, the first diode D1 is used for reverse voltage input protection, and the first capacitor C4, the second capacitor C5, and the third capacitor C1 eliminate jitter to ensure the reliability of the input circuit.

The power supply includes a battery module and a power supply circuit. The power supply circuit includes a water level monitoring module power supply circuit and a low-power wireless communication module power supply circuit. The water level monitoring module power supply circuit is respectively connected with the water level monitoring module, the battery module, and the main control chip U2. The communication module power supply circuit is connected with the battery module, the low-power wireless communication module, and the main control chip U2, and the main control chip U2 controls the power supply to supply power to the water level monitoring module and the low-power wireless communication module.

The power supply circuit of the water level monitoring module includes a fifth resistor R18, a first triode Q20, a third field effect transistor Q12, and a sixth resistor R1. One end of the fifth resistor R18 is connected to the main control chip U2, and the other end is connected to the first triode. The base of the transistor Q20 is connected, the emitter of the first transistor Q20 is grounded, and the collector is connected to the gate of the third field effect transistor Q12 and the first end of the sixth resistor R1, and the second end of the sixth resistor R1 is connected to The battery module and the drain of the third field effect transistor Q12 are connected, and the source of the third field effect transistor Q12 is connected to the water level measuring chip to supply power to the water level measuring chip.

In one embodiment, the water level monitoring module power supply circuit further includes a twelfth resistor R97, wherein one end of the twelfth resistor R97 is grounded, and the other end is connected to the base of the first transistor Q20.

Among them, in the low power consumption state, the signal 485EN output by the main control chip U2 is low level, the first transistor Q20 and the third field effect transistor Q12 are turned off, and the water level monitoring module has no power and does not work; in the working state , the signal 485EN output by the main control chip U2 is high level, the first transistor Q20 and the third field effect transistor Q12 are turned off and turned on, the water level monitoring module works normally, the fifth resistor R18, the sixth resistor R1 and the twelfth Resistor R97 is the bias resistor.

The water level monitoring terminal further includes a wired communication module, the wired communication module is connected with the main control chip U2, and the power supply circuit further includes a wired communication module power supply circuit, which is respectively connected with the main control chip U2, the wired communication module and the battery module. The wired communication module power supply circuit supplies power to the wired communication module.

The water level monitoring module further includes a power output module, the power supply circuit further includes an output power circuit, and the output power circuit is respectively connected with the power output module, the battery module and the main control chip U2.

In this embodiment, the power supply circuit of the wired communication module and the power supply circuit of the water level monitoring module have the same circuit structure and the same working principle.

The output power circuit includes the same circuit structure as the water level monitoring module power supply circuit, and also includes a connector, one end of the connector is connected to the battery module, and the other end is connected to the output port of the output power circuit.

The power supply circuit of the low-power wireless communication module includes a seventh resistor R78, an eighth resistor R79, a second transistor Q17, a ninth resistor R77, a fourth field effect transistor Q16, a tenth resistor R75, a fourth capacitor C52, and a fifth Capacitor C53, the first end of the seventh resistor R78 is connected to the main control chip U2, the second end is connected to the first end of the eighth resistor R79 and the first end of the second transistor Q17, the second end of the eighth resistor R79 is connected The terminal is grounded, the emitter of the second transistor Q17 is grounded, and the collector is connected to the gate of the fourth field effect transistor Q16 and the first terminal of the ninth resistor R77, and the second terminal of the ninth resistor R77 is connected to the battery module, the The first end of the tenth resistor R75 is connected to the drain of the fourth field effect transistor Q16, the source of the fourth field effect transistor Q16 is connected to the second end of the tenth resistor R75 and the first end of the fourth capacitor C52, and the fourth The second end of the capacitor C52 is grounded, the first end of the fifth capacitor C53 is connected to the first end of the fourth capacitor C52 and the main control chip U2, and the second end is grounded.

In one embodiment, the low-power wireless communication module power supply circuit further includes a sixth capacitor C54, a seventh capacitor C55, an eighth capacitor C56, and a ninth capacitor C57, the sixth capacitor C54, the seventh capacitor C55, the eighth capacitor C54, the One end of the capacitor C56 and the ninth capacitor C57 is grounded, and the other end is connected to the main control chip U2.

When entering the low power consumption state after processing all the uploaded background data, the signal VBAT_EN output by the main control chip U2 is low level, the second transistor Q17 and the fourth field effect transistor Q16 are turned off, the VDD_NB power supply has no power, and the low power The power consumption wireless communication module does not work; in the working state, the signal VBAT_EN output by the main control chip U2 is high level, the second transistor Q17 and the fourth field effect crystal are turned on, the low power consumption wireless communication module works normally, the first The seventh resistor R78, the eighth resistor R79, and the ninth resistor R77 are bias resistors, and the tenth resistor R75 is a reserved resistor, which is used when there is no need to control the level of the VDD_NB power supply. The fourth capacitor C52 is a reserved Farad super capacitor. The fifth capacitor C53, the sixth capacitor C54, the seventh capacitor C55, the eighth capacitor C56, and the ninth capacitor C57 are used to improve the stability of the power supply circuit of the low-power wireless communication module.

The water level monitoring terminal also includes a low-voltage detection module, the power supply circuit includes a low-voltage detection module power supply circuit, the low-voltage detection module is connected to the battery module, and the low-voltage detection module power supply circuit is respectively connected to the main control chip U2, the low-voltage monitoring module, and the battery module.

In this embodiment, the power supply circuit of the low-voltage detection module includes a thirteenth resistor R15, a fourteenth resistor R16, a fifth field effect transistor Q3A, a fifteenth resistor R9, a sixth field effect transistor Q3B, a sixteenth resistor R10, The seventeenth resistor R17 and the tenth capacitor C11, one end of the thirteenth resistor R15 is connected to the main control chip U2, and the other end is connected to the first end of the fourteenth resistor R16 and the gate of the fifth field effect transistor Q3A. The second end of the fourteenth resistor R16 and the source of the fifth field effect transistor Q3A are grounded, and one end of the fifteenth resistor R9 is connected to the drain of the fifth field effect transistor Q3A and the gate of the sixth field effect transistor Q3B. One end is connected to the battery module and the drain of the sixth field effect transistor Q3B, the source of the sixth field effect transistor Q3B is connected to the first end of the sixteenth resistor R10, and the second end of the sixteenth resistor R10 is connected to the seventeenth The first end of the resistor R17, the first end of the tenth capacitor C11, and the low-voltage detection module are connected, and the second end of the seventeenth resistor R17 and the tenth capacitor C11 is grounded.

In this embodiment, the fifth field effect transistor Q3A and the sixth field effect transistor Q3B are packaged together, that is, the packaged field effect transistor AO7600 is used instead to realize the functions of the fifth field effect transistor Q3A and the sixth field effect transistor Q3B.

In other embodiments, two independent field effect transistors may also be provided respectively as the fifth field effect transistor Q3A and the sixth field effect transistor Q3B in the circuit.

When it is not necessary to detect the battery voltage for low power consumption, the signal ADC_EN output by the main control chip U2 is low level, the fifth field effect transistor Q3A and the sixth field effect transistor Q3B are turned off, and no current flows through the ADC; When the voltage is on (the frequency of daily detection, three-day detection, and once-a-week detection can be set), the signal ADC_EN output by the main control chip U2 is high level, the fifth field effect transistor Q3A and the sixth field effect transistor Q3B are turned on, and the ADC is turned on. When there is current passing through, the main control chip U2 calculates the battery voltage and sends relevant data to the background. The thirteenth resistor R15, the fourteenth resistor R16, and the fifteenth resistor R9 are bias resistors. The sixteenth resistor R10 and the seventeenth resistor R17 is a voltage dividing resistor, and the tenth resistor R75 can improve the reliability when the battery voltage and current are jittered.

In this embodiment, the working voltages of the low-power wireless communication module and the main control chip U2 are different, in order to ensure the effective transmission of signals and the normal operation of the low-power wireless communication module. The water level monitoring terminal also includes a level conversion circuit, which is respectively connected with the main control chip U2 and the low-power wireless communication module. The main control chip U2 transmits signals to the low-power wireless communication module through the level conversion circuit.

In one embodiment, the level conversion circuit includes a voltage conversion chip U6, an eighteenth resistor R98, a nineteenth resistor R99, a twentieth resistor R100, and a twenty-first resistor R101, wherein one end of the eighteenth resistor R98 It is connected with the first data output pin of the main control chip U2 and the B2 pin of the voltage conversion chip U6, the other end is connected with the voltage pin of the main control chip U2, and one end of the nineteenth resistor R99 is connected with the first data output pin of the main control chip U2. The second data output pin is connected to the B1 pin of the voltage conversion chip U6, the other end is connected to the voltage pin of the main control chip U2, and one end of the twentieth resistor R100 is connected to the A1 pin of the voltage conversion chip U6, the low-power wireless The communication module is connected, the other end is connected to the VDD-EXT pin of the main control chip U2, one end of the twenty-first resistor R101 is connected to the A2 pin of the voltage conversion chip U6 and the low-power wireless communication module, and the other end is connected to the main control The VDD-EXT pin of chip U2 is connected.

The main control chip U2 works at the battery voltage. The low-power wireless communication module is the NB-IOT communication module, and its serial port level is 2.8V. The left side of this circuit is the HC32 voltage, and the right side is the stable output of the NB-IOT module. 2.8V level, the eighteenth resistor R98, the nineteenth resistor R99, the twentieth resistor R100, and the twenty-first resistor R101 are pull-up resistors.

Beneficial effects: the water level monitoring terminal of the present invention selects a logic device according to the input and output requirements and the logic relationship of the logic control system, generates a logic device drawing, and obtains a C language file corresponding to the logic control system through the description file generated by the logic device drawing, thereby realizing the logic The compilation of the control system, by combining logic devices with different logic functions to generate the logic control system, avoids the problem of directly using the program to realize the logic relationship, reduces the difficulty of program development, improves the development efficiency, and is not prone to errors, and improves the program. Stability, simple debugging, reduce the difficulty of maintaining logic code, and improve the maintenance effect and maintenance effect.

Based on the same inventive concept, the present invention also proposes an intelligent terminal. Please refer to FIG. 10 . FIG. 10 is a structural diagram of an embodiment of the intelligent terminal of the present invention. The intelligent terminal of the present invention will be described with reference to FIG. 10 .

In this embodiment, the intelligent terminal includes a processor and a memory, the processor is connected in communication with the memory, the memory stores a computer program, and the computer program is used to execute the water level monitoring terminal described in the above embodiments.

In some embodiments, the memory may include, but is not limited to, high-speed random access memory, non-volatile memory. For example one or more magnetic disk storage devices, flash memory devices or other non-volatile solid state storage devices. The processor may be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it may also be a digital signal processor (Digital Signal Processing, DSP for short), a dedicated integrated Circuit (Application Specific Integrated Circuit, ASIC for short), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, and discrete hardware components.

Based on the same inventive concept, the present invention also proposes a computer-readable storage medium. Please refer to FIG. 11. FIG. 11 is a structural diagram of an embodiment of the computer-readable storage medium of the present invention. Be explained.

In this embodiment, the computer-readable storage medium stores program data, and the program data is used to execute the water level monitoring terminal described in the above embodiments.

The computer-readable storage medium may include, but is not limited to, floppy disk, optical disk, CD-ROM (compact disk-read only memory), magneto-optical disk, ROM (read only memory), RAM (random access memory), EPROM (Erasable Programmable Read Only Memory), EEPROM (Electrically Erasable Programmable Read Only Memory), magnetic or optical cards, flash memory, or other type of medium/machine readable medium suitable for storing machine executable instructions. The computer-readable storage medium may be a product that is not connected to the computer device, or may be a component that is connected to the computer device for use.

The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other.

The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a water level monitor terminal which characterized in that, water level monitor terminal includes: the water level monitoring system comprises a main control module, a water immersion switch, a low-power wireless communication module, a power supply and a water level monitoring module, wherein the main control module and the power supply are respectively connected with the water immersion switch, the low-power wireless communication module and the water level monitoring module;

after monitoring accumulated water, the water logging switch sends an accumulated water signal to the main control module, the main control module receives the accumulated water signal, triggers the water level monitoring module to work, and sends water level information acquired by the water level monitoring module through the low-power wireless communication module;

the water level monitoring module comprises a water level measuring capacitor and a water level metering chip, the main control module comprises a main control chip, two ends of the water level measuring capacitor are connected with the water level metering chip, the main control chip is in communication connection with the water level metering chip, the water level measuring capacitor is different in water immersion height, and corresponding capacitance values are different.

2. The water level monitoring terminal according to claim 1, further comprising an input circuit, wherein the input circuit is connected to the water immersion switch and the main control module respectively.

3. The water level monitor terminal as claimed in claim 2, wherein the input circuit comprises a first field effect transistor, a first resistor, a first capacitor, a second resistor, a third resistor, a second capacitor, a second field effect transistor, a fourth resistor and a third capacitor, wherein the gate of the first field effect transistor is connected to the output terminal of the water immersion switch, the second terminal of the first resistor and the first terminal of the first capacitor, the drain is connected to the main control chip and the first terminal of the first resistor, the source is connected to the first terminal of the second resistor and the first terminal of the third resistor, the second terminal of the first capacitor is connected to the second terminal of the second resistor, the second terminal of the second capacitor and the source of the second field effect transistor, and is grounded, the second terminal of the third resistor is connected to the first terminal of the second capacitor and the gate of the second field effect transistor, the drain electrode of the second field effect transistor is connected with the second end of the fourth resistor and the main control chip, the first end of the fourth resistor is connected with the main control chip, one end of the third capacitor is grounded, and the other end of the third capacitor is connected with the main control chip.

4. The water level monitoring terminal according to claim 1, wherein the power source comprises a battery module and a power supply circuit, the power supply circuit comprises a water level monitoring module power supply circuit and a low power consumption wireless communication module power supply circuit, the water level monitoring module power supply circuit is respectively connected with the water level monitoring module, the battery module and a main control chip, the low power consumption wireless communication module power supply circuit is connected with the battery module, the low power consumption wireless communication module and the main control chip, and the main control chip controls the power source to supply power to the water level monitoring module and the low power consumption wireless communication module.

5. The water level monitoring terminal according to claim 4, wherein the water level monitoring module power supply circuit comprises a fifth resistor, a first triode, a third field effect transistor and a sixth resistor, one end of the fifth resistor is connected with the main control chip, the other end of the fifth resistor is connected with the base of the first triode, the emitter of the first triode is grounded, the collector of the first triode is connected with the gate of the third field effect transistor and the first end of the sixth resistor, the second end of the sixth resistor is connected with the battery module and the drain of the third field effect transistor, and the source of the third field effect transistor is connected with the water level metering chip to supply power to the water level metering chip.

6. The water level monitoring terminal according to claim 4, further comprising a wired communication module connected to the main control chip, wherein the power supply circuit further comprises a wired communication module power supply circuit connected to the main control chip, the wired communication module and the battery module, respectively, for supplying power to the wired communication module through the wired communication module power supply circuit.

7. The water level monitoring terminal according to claim 4, wherein the water level monitoring module further comprises a power output module, the power supply circuit further comprises an output power circuit, and the output power circuit is respectively connected with the power output module, the battery module and the main control chip.

8. The water level monitoring terminal as claimed in claim 4, wherein the low power consumption wireless communication module power supply circuit comprises a seventh resistor, an eighth resistor, a second triode, a ninth resistor, a fourth field effect transistor, a tenth resistor, a fourth capacitor, and a fifth capacitor, a first end of the seventh resistor is connected to the main control chip, a second end of the seventh resistor is connected to a first end of the eighth resistor and a first end of the second triode, a second end of the eighth resistor is grounded, an emitter of the second triode is grounded, a collector is connected to a gate of the fourth field effect transistor and a first end of the ninth resistor, a second end of the ninth resistor is connected to the battery module, a first end of the tenth resistor, and a drain of the fourth field effect transistor, a source of the fourth field effect transistor is connected to a second end of the tenth resistor and a first end of the fourth capacitor, the second end of the fourth capacitor is grounded, the first end of the fifth capacitor is connected with the first end of the fourth capacitor and the main control chip, and the second end of the fifth capacitor is grounded.

9. The water level monitoring terminal according to claim 4, further comprising a low voltage detection module, wherein the power supply circuit comprises a low voltage detection module power supply circuit, the low voltage detection module is connected to the battery module, and the low voltage detection module power supply circuit is respectively connected to the main control chip, the low voltage monitoring module and the battery module.

10. The water level monitoring terminal according to claim 1, further comprising a wake-up circuit, a power-on circuit, and a reset circuit, wherein the wake-up circuit, the power-on circuit, and the reset circuit are respectively connected to the main control chip and the low power consumption wireless communication module.

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