Water level exceeding early warning device for well lid

Abstract

The utility model relates to the technical field of well lid monitoring, in particular to a water level exceeding early warning device for a well lid, which comprises an early warning device body, a water level sensor is embedded in the front side of the early warning device, a circuit board is arranged in the early warning device, and the circuit board comprises a processor, a communication module and a water level judgment circuit. The water level sensor is electrically connected with the processor through the water level judgment circuit; the water level judgment circuit comprises a first judgment circuit and a second judgment circuit, the first judgment circuit receives and compares data collected by the water level sensor and transmits a signal to the processor according to a comparison result, and the processor transmits a primary alarm signal to the monitoring end through the communication module; the second judgment circuit receives and compares data collected by the water level sensor and transmits a signal to the processor according to a comparison result, and the processor transmits a secondary alarm signal to the monitoring end through the communication module; the utility model solves the technical problem that the existing over-water-level early warning device cannot evaluate the emergency degree based on the rising condition of the water level in the well.

Description

Technical Field

[0001] This utility model relates to the field of manhole cover monitoring technology, and more specifically, to an overwater level early warning device for manhole covers. Background Technology

[0002] Manhole covers, as an important component of urban infrastructure, play a crucial role in underground pipeline systems such as drainage, communications, and electricity. However, under conditions of high water levels, existing manhole covers reveal numerous defects. When the water level inside the manhole is too high, the manhole cover cannot automatically detect changes in water level and cannot issue timely warning signals, resulting in the failure to detect and address water accumulation problems in a timely manner. This can not only cause the manhole cover to be lifted and damaged by accumulated water, but also potentially lead to safety accidents such as pedestrians and vehicles falling into the manhole. Furthermore, prolonged water accumulation can easily cause pollution and damage to the surrounding environment.

[0003] Existing overwater level warning devices for manhole covers collect real-time water level data from the manholes using sensors and transmit the data to a data center for processing and analysis. When the water level exceeds a preset threshold, the system issues a warning signal so that relevant personnel can take timely measures. However, this method has significant limitations: it can only determine the overwater level status based on a fixed threshold, but it cannot assess the rate of water level rise and thus determine its urgency. In some rainy scenarios, especially during heavy rain, multiple manhole covers may experience overwater levels, with varying rates of water level rise. In such cases, existing warning systems struggle to prioritize the areas requiring urgent attention, potentially leading workers to address areas with lower urgency while neglecting high-risk areas with rapidly rising water levels that could cause serious consequences, thereby increasing the likelihood of hazards. Utility Model Content

[0004] The purpose of this application is to provide an overwater level warning device for manhole covers, which solves the technical problem that existing overwater level warning devices cannot assess the degree of urgency based on the rise in water level inside the well.

[0005] To solve the above-mentioned technical problems, the solution adopted in this application is as follows:

[0006] This utility model provides an overwater level warning device for manhole covers, including a warning device body, a water level sensor embedded in the front side of the warning device, characterized in that: a circuit board is provided inside the warning device, the circuit board includes a processor, a communication module, and a water level judgment circuit, the water level sensor is electrically connected to the processor through the water level judgment circuit, and the processor is connected to the communication module;

[0007] The water level judgment circuit includes a first judgment circuit and a second judgment circuit. The input terminal of the first judgment circuit, the input terminal of the second judgment circuit, and the output terminal of the water level sensor are connected together. The output terminals of the first judgment circuit and the second judgment circuit are respectively connected to the processor.

[0008] The first judgment circuit receives and compares the data collected by the water level sensor, and transmits a control signal to the processor according to the comparison result. The processor transmits a control signal representing a first-level alarm to the monitoring terminal through the communication module.

[0009] The second judgment circuit receives and compares the data collected by the water level sensor, and transmits a control signal to the processor according to the comparison result. The processor transmits a control signal representing a level 2 alarm to the monitoring terminal through the communication module.

[0010] In some embodiments, the circuit board further includes a timing circuit, the input terminal of which is connected to a first judgment circuit and a second judgment circuit respectively, and the output terminal of which is connected to the processor;

[0011] After receiving the control signal from the first judgment circuit, the timing circuit starts timing; after receiving the control signal from the second judgment circuit, the timing circuit stops timing and sends the timing data to the processor.

[0012] In some embodiments, the timing circuit includes a pulse generator, a counter, a latch, and an instruction distribution circuit. The instruction distribution circuit is connected to the pulse generator, the counter, and the latch, respectively. The pulse generator, the counter, and the latch are connected in sequence. The counter counts the pulse signals transmitted by the pulse generator.

[0013] The instruction distribution circuit and the water level judgment circuit are connected. The instruction distribution circuit receives the control signal transmitted by the water level judgment circuit and analyzes it. Based on the analysis result, it controls the pulse generator, counter and latch to work respectively.

[0014] The latch is connected to the processor, and the latch reads the timing data of the counter and transmits the timing data to the processor.

[0015] In some embodiments, the instruction dispatch circuit includes an XOR gate and a NOT gate. The two inputs of the XOR gate are respectively connected to the water level judgment circuit. The output of the XOR gate is connected to the reset terminal of the generator and the input of the NOT gate. The output of the NOT gate is connected to the enable terminal of the latch. One input of the XOR gate is connected to the reset terminal of the counter.

[0016] In some embodiments, the latch is a D latch, and the D latch is model 74LS75.

[0017] In some embodiments, the first judgment circuit includes a first comparator and a first threshold circuit, one input terminal of the first comparator serves as the input terminal of the first judgment circuit, and the other two input terminals of the first comparator are connected to the first threshold circuit; the output terminal of the first comparator serves as the output terminal of the first judgment circuit.

[0018] The second judgment circuit includes a second comparator and a second threshold circuit. The input terminal of the second comparator serves as the input terminal of the second judgment circuit, and the two input terminals of the second comparator are connected to the second threshold circuit. The output terminal of the second comparator serves as the output terminal of the second judgment circuit.

[0019] The voltage signal output by the first threshold circuit is less than the voltage signal output by the second threshold circuit.

[0020] In some embodiments, both the first comparator and the second comparator are of model LM358.

[0021] In some embodiments, the water level sensor includes an ultrasonic sensor, and the output terminal of the ultrasonic sensor is connected to the water level determination circuit.

[0022] In some embodiments, the processor includes a main control chip, wherein the main control chip is an STM32F030F4P6TR.

[0023] In some embodiments, the communication module includes a communication chip, the communication chip being of model SIM300C.

[0024] The technical solution of this application has at least the following advantages and beneficial effects:

[0025] 1. This utility model is equipped with a water level judgment circuit, which includes a first judgment circuit and a second judgment circuit. The first judgment circuit receives and compares the data collected by the water level sensor, and transmits a signal to the processor according to the comparison result. The processor transmits a first-level alarm signal to the monitoring terminal through the communication module. The second judgment circuit receives and compares the data collected by the water level sensor, and transmits a signal to the processor according to the comparison result. The processor transmits a second-level alarm signal to the monitoring terminal through the communication module. The second-level alarm signal is more urgent than the first-level alarm signal. This utility model assesses the degree of urgency based on the control signal output by the first or second judgment circuit. When multiple manhole covers simultaneously exceed the water level, it can prioritize the area with a higher degree of urgency. That is, when multiple manhole covers issue alarm signals, emergency measures are implemented first for the manhole cover that issues a second-level alarm signal, thereby reducing the probability of high-risk events being missed.

[0026] 2. The circuit board in this invention also includes a low-cost timing circuit. This timing circuit quantifies the rate of water level rise based on the interval between the water level exceeding a first threshold and exceeding a second threshold, thereby prioritizing high-risk manhole covers. This invention breaks through the traditional static judgment method with fixed thresholds. It can distinguish between rapid water rise and slow seepage scenarios, accurately identifying high-risk areas. After triggering an early warning at the first water level point, it allows staff time to respond; if the water level continues to rise rapidly to the second water level point, it will escalate to an emergency alarm. This tiered alarm mechanism can encourage staff to allocate resources and energy more rationally, prioritizing the most urgent situations, reducing the probability of missing high-risk events, and thus reducing potential hazards. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model installed on a manhole cover;

[0028] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0029] Figure 3 This is the circuit diagram for water level detection of this utility model;

[0030] Figure 4 This is the timing circuit diagram of this utility model;

[0031] In the diagram: 1-Heat sink, 2-Ultrasonic sensor. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. The terms "center," "upper," "lower," "inner," and "outer," indicating orientation or positional relationships based on the orientation or positional relationships shown in the figures, or the orientation or positional relationships commonly used when the product is in use, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation on this application. It should also be noted that unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] Example 1

[0035] Please refer to Figures 1-2 This utility model provides an overwater level warning device for manhole covers, which is the same as the prior art, including a warning device body and a water level sensor embedded in the front of the warning device. The water level sensor is used to monitor the water level in the well in real time.

[0036] It should be noted that this device is also equipped with a heat sink 1 for heat dissipation.

[0037] Unlike existing technologies, the early warning device has a circuit board inside, which includes a processor, a communication module, and a water level judgment circuit. The water level sensor is electrically connected to the processor through the water level judgment circuit, and the processor is connected to the communication module.

[0038] The water level judgment circuit includes a first judgment circuit and a second judgment circuit. The input terminal of the first judgment circuit, the input terminal of the second judgment circuit, and the output terminal of the water level sensor are connected together. The output terminals of the first judgment circuit and the second judgment circuit are respectively connected to the processor.

[0039] The first judgment circuit receives and compares the data collected by the water level sensor, and transmits the control signal to the processor according to the comparison result. The processor then transmits the control signal representing the first-level alarm to the monitoring terminal through the communication module.

[0040] The second judgment circuit receives and compares the data collected by the water level sensor, and transmits the control signal to the processor based on the comparison result. The processor then transmits the control signal representing the level two alarm to the monitoring terminal through the communication module.

[0041] When the monitoring terminal receives a Level 1 alarm control signal, staff will take corresponding emergency measures. When the monitoring terminal receives a Level 2 alarm control signal, it means that the water level in the manhole cover is more serious, and staff can take more prioritized emergency measures accordingly. This solves the technical problem that existing water level warning devices cannot assess the degree of urgency based on the rise in the water level inside the well.

[0042] The advantage of this design is that when multiple monitoring points trigger alarms simultaneously, the monitoring terminal can prioritize marking the location of high-risk manhole covers based on the secondary alarm signal (high urgency), thereby solving the problem of chaotic resource allocation caused by the inability of traditional equipment to distinguish the degree of urgency, and achieving efficient and accurate allocation of limited emergency resources.

[0043] In this embodiment, the water level sensor includes an ultrasonic sensor 2, the output terminal of which is connected to the water level judgment circuit; the ultrasonic sensor 2 is model ELF500-18GM45-U-V15.

[0044] In this embodiment, the processor includes a main control chip, the model of which is STM32F030F4P6TR.

[0045] In this embodiment, the communication module includes a communication chip, the model of which is SIM300C.

[0046] It should be noted that both the main control chip and the communication chip are existing technologies. The connection between these two chips can be achieved by referring to the relevant contents in the communication chip technical manual and the main control chip technical manual. Therefore, the connection between the main control chip and the communication chip will not be described in detail here.

[0047] Furthermore, the first judgment circuit includes a first comparator and a first threshold circuit. One input terminal of the first comparator serves as the input terminal of the first judgment circuit, and the other two input terminals of the first comparator are connected to the first threshold circuit. The output terminal of the first comparator serves as the output terminal of the first judgment circuit.

[0048] The second judgment circuit includes a second comparator and a second threshold circuit. The input terminal of the second comparator serves as the input terminal of the second judgment circuit, and the two input terminals of the second comparator are connected to the second threshold circuit. The output terminal of the second comparator serves as the output terminal of the second judgment circuit.

[0049] It is worth noting that the voltage signal output by the first threshold circuit is lower than the voltage signal output by the second threshold circuit. This design aims to prevent the alarm signal from being triggered beyond its set threshold, which could lead to false alarms.

[0050] It should be noted that both the first and second comparators are LM358.

[0051] Furthermore, the water level judgment circuit includes comparators U1 and U2, resistors R1, R2, R3, R4, R5, and R6, and ordinary capacitors C1 and C2.

[0052] The first judgment circuit includes comparator U1, resistors R1, R2, and R5, and ordinary capacitor C1; the second judgment circuit includes comparator U2, resistors R3, R4, and R6, and ordinary capacitor C2; the first threshold circuit includes resistors R1 and R2; and the second threshold circuit includes resistors R3 and R4.

[0053] It should be noted that comparator U1 is the first comparator and comparator U2 is the second comparator.

[0054] Specifically, such as Figure 3 As shown, one end of resistor R5 is connected to one end of resistor R6 and is set as the P_IN input terminal. The other end of resistor R5, one end of ordinary capacitor C1, and pin 1 of comparator U1 are connected. Pin 2 of comparator U1 is connected to one end of resistor R1 and connected to the power supply. Pin 3 of comparator U1, the other end of resistor R1, and one end of resistor R2 are connected. The other end of resistor R2 is connected to pin 5 of comparator U1 and grounded. Pin 4 of comparator U1 is set as the P_OUT1 output terminal. The other end of resistor R6, one end of ordinary capacitor C2, and pin 1 of comparator U2 are connected. The other end of ordinary capacitor C1 and the other end of ordinary capacitor C2 are connected to the ground. Pin 2 of comparator U2 is connected to one end of resistor R3 and connected to the power supply. The other end of resistor R3, pin 3 of comparator U2, and one end of resistor R4 are connected. The other end of resistor R4 is connected to pin 5 of comparator U2 and grounded. Pin 4 of comparator U2 is set as the P_OUT2 output terminal.

[0055] It should be noted that the P_IN input terminal is connected to the output terminal of the water level sensor, and the P_OUT1 and P_OUT2 output terminals are connected to the PA9 and PA10 pins of the processor, respectively.

[0056] For ease of understanding, the workflow of the water level detection circuit is as follows:

[0057] The water level sensor monitors the water level in the well in real time and transmits the water level data to the water level judgment circuit;

[0058] When the first judgment circuit determines that the water level exceeds the first threshold, the comparator U1 outputs a high-level signal from the P_OUT1 output terminal to the processor. After receiving the signal, the processor transmits the control signal to the monitoring terminal through the communication module. After receiving the data, the staff takes emergency measures.

[0059] Based on the first judgment circuit determining that the water level exceeds the first threshold, when the second judgment circuit determines that the water level exceeds the second threshold, comparator U2 outputs a high-level signal from the P_OUT2 output terminal to the processor. After receiving the signal, the processor transmits the control signal to the monitoring terminal through the communication module. After receiving the data, the staff takes more priority emergency measures.

[0060] This utility model also includes a power supply module, which is used to supply power to the processor, communication module, and water level judgment circuit; the power supply module is prior art and will not be described in detail here.

[0061] Example 2

[0062] Based on Embodiment 1, the circuit board further includes a timing circuit, the input terminal of which is connected to the first judgment circuit and the second judgment circuit respectively, and the output terminal of which is connected to the processor.

[0063] After receiving the control signal from the first judgment circuit, the timing circuit starts timing; after receiving the control signal from the second judgment circuit, the timing circuit stops timing and sends the timing data to the processor.

[0064] The purpose of the timing circuit is to further prioritize high-risk manhole covers based on the time interval between the water level exceeding a first threshold and exceeding a second threshold. A shorter interval indicates a faster water level rise rate at that manhole cover; a longer interval indicates a slower water level rise rate. For manhole cover areas with faster water level rises, workers will prioritize implementing emergency measures for those areas.

[0065] Furthermore, the timing circuit includes a pulse generator, a counter, a latch, and an instruction distribution circuit. The instruction distribution circuit is connected to the pulse generator, the counter, and the latch respectively. The pulse generator, the counter, and the latch are connected in sequence. The counter counts the pulse signals transmitted by the pulse generator.

[0066] The instruction distribution circuit and the water level judgment circuit are connected. The instruction distribution circuit receives the control signal transmitted by the water level judgment circuit and analyzes it. Based on the analysis result, it controls the pulse generator, counter and latch to work respectively.

[0067] The latch is connected to the processor. The latch reads the timing data from the counter and transmits the timing data to the processor.

[0068] In this embodiment, the latch is a D latch, model number 74LS75; the pulse generator is model number NE555DR; and the counter is model number 74LS163.

[0069] Furthermore, the instruction dispatch circuit includes an XOR gate and a NOT gate. The two inputs of the XOR gate are connected to the water level judgment circuit, respectively. The output of the XOR gate is connected to the reset terminal of the generator and the input of the NOT gate. The output of the NOT gate is connected to the enable terminal of the latch. One input of the XOR gate is connected to the reset terminal of the counter.

[0070] In this embodiment, the XOR gate is model SN74LVC1G86DCKR; the NOT gate is model 74LVC1G04DBVRG.

[0071] Furthermore, the timing circuit includes an XOR gate U3, an NOT gate U5, a pulse generator U4, a counter U6, a latch U7, resistors R7 and R8, a general-purpose capacitor C3, and a polarized capacitor C4.

[0072] The instruction dispatch circuit includes an XOR gate U3 and a NOT gate U5.

[0073] Specifically, such as Figure 4 As shown, pin 5 of XOR gate U3 is connected to the power supply, and pin 3 is grounded. Pin 1 of XOR gate U3, pin 1 of counter U6, and pin 10 of counter U6 are connected and set as the T_IN1 input terminal. Pin 2 of XOR gate U3 is set as the T_IN2 input terminal. Pin 4 of XOR gate U3, pin 4 of pulse generator U4, pin 7 of counter U6, and pin 2 of NOT gate U5 are connected. Pin 5 of NOT gate U5 is connected to the power supply, and pin 3 is grounded. Pin 4 of NOT gate U5, pin 4 of latch U7, and pin 13 of latch U7 are connected. One end of resistor R7 is connected to pin 8 of pulse generator U4 and is connected to the power supply. The other end of resistor R7 is connected to pin 7 of pulse generator U4 and one end of resistor R8. The other end of resistor R8 is connected to pin 2 of pulse generator U4, pin 6 of pulse generator U4, and the polarized capacitor C4. The positive terminals are connected together. Pin 3 of pulse generator U4 is connected to pin 2 of counter U6. Pin 5 of pulse generator U4 is connected to one end of ordinary capacitor C3. The other end of ordinary capacitor C3, pin 1 of pulse generator U4, and the negative terminal of polarized capacitor C4 are connected and grounded. Pins 3, 4, 5, 6, 8, and 9 of counter U6 are connected and grounded. Pin 16 of counter U6 is connected to the power supply. Pins 14, 13, 12, and 11 of counter U6 are connected to pins 2, 3, 6, and 7 of latch U7, respectively. Pin 5 of latch U7 is connected to the power supply, and pin 12 is grounded. Pins 16, 15, 10, and 9 of latch U7 are set as output terminals T_OUT1, T_OUT2, T_OUT3, and T_OUT4, respectively.

[0074] It should be noted that the T_IN1 input terminal is connected to the P_OUT1 output terminal; the T_IN2 input terminal is connected to the P_OUT2 output terminal; and the T_OUT1, T_OUT2, T_OUT3, and T_OUT4 output terminals are connected to the processor's PB1, PA7, PA6, and PA5 pins, respectively.

[0075] For ease of understanding, the working process of the timing circuit is as follows:

[0076] The first and second judgment circuits monitor the water level in real time.

[0077] When the first judgment circuit determines that the water level exceeds the first threshold, the first judgment circuit outputs a high level to the processor and the timing circuit respectively. The processor sends control signal data representing the first-level alarm to the monitoring terminal. The T_IN1 input terminal of the timing circuit receives a high level, that is, pin 1 of the XOR gate U3 and pins 1 and 10 of the counter receive a high level. Then, the XOR gate U3 outputs a high level to pin 4 of the pulse generator U4, pin 7 of the counter U6, and pin 2 of the NOT gate U5 respectively. At this time, the pulse generator U4 starts to send pulse signals to the counter U6, the counter U6 starts counting, and the NOT gate U5 outputs a low level to the latch U7, and the latch U7 does not work.

[0078] When the second judgment circuit determines that the water level exceeds the second threshold, the second judgment circuit outputs a high level to the processor and the timing circuit respectively. The processor sends control signal data representing the second-level alarm to the monitoring terminal. The T_IN2 input terminal of the timing circuit receives a high level, that is, pin 2 of the XOR gate U3 receives a high level. Then, the XOR gate U3 outputs a low level to pin 4 of the pulse generator U4, pin 7 of the counter U6, and pin 2 of the NOT gate U5 respectively. At this time, the pulse generator U4 stops sending pulse signals to the counter U6, the counter U6 stops counting and latches the count data. The NOT gate U5 outputs a high level to the latch U7. The latch U7 works and reads the count data of the counter U6, and transmits the read count data to the processor.

[0079] The processor receives and processes the counting data to obtain the interval between the water level exceeding the first threshold and the water level exceeding the second threshold. The processor transmits the interval to the monitoring terminal, and the staff implements a graded emergency response for the corresponding manhole cover according to the principle that the shorter the interval, the higher the priority of the response.

[0080] It should be noted that in this embodiment, the processor processes the counting data to obtain the interval time by multiplying the counting data by a preset pulse period, which is a conventional algorithm well known to those skilled in the art. The focus of this solution is on performing the counting operation between the water level exceeding the first threshold and exceeding the second threshold, while the processor deriving the interval time based on the counting data is not the key technical point of this embodiment.

[0081] It should be noted that all the electronic devices mentioned in the above embodiments are available in domestic and international markets.

[0082] The various embodiments of this utility model have now been described in detail. To avoid obscuring the concept of this utility model, some details known in the art have not been described. Those skilled in the art will fully understand how to implement the technical solution of this utility model based on the above description. The scope of this utility model is defined by the appended claims.

Claims

1. An over-water-level early warning device for a well lid, comprising an early warning device body, a water level sensor is embedded in the front side of the early warning device, characterized in that: The early warning device is internally provided with a circuit board, which comprises a processor, a communication module and a water level judgment circuit; the water level sensor is electrically connected to the water level judgment circuit and the processor; the processor is connected to the communication module; The water level judgment circuit comprises a first judgment circuit and a second judgment circuit; the input end of the first judgment circuit, the input end of the second judgment circuit and the output end of the water level sensor are connected; the output end of the first judgment circuit and the output end of the second judgment circuit are respectively connected to the processor; The first judgment circuit receives and compares the data collected by the water level sensor, and transmits a control signal to the processor according to the comparison result; the processor transmits a control signal representing a first-level alarm to the monitoring end through the communication module; The second judgment circuit receives and compares the data collected by the water level sensor, and transmits a control signal to the processor according to the comparison result; the processor transmits a control signal representing a second-level alarm to the monitoring end through the communication module.

2. The super-high water level early warning device for a well lid according to claim 1, characterized in that, The circuit board further comprises a timing circuit; the input end of the timing circuit is connected to the first judgment circuit and the second judgment circuit; the output end of the timing circuit is connected to the processor; After receiving the control signal of the first judgment circuit, the timing circuit starts timing; after receiving the control signal of the second judgment circuit, the timing circuit stops timing and sends timing data to the processor.

3. The super-high water level warning device for a well lid according to claim 2, characterized in that, The timing circuit comprises a pulse generator, a counter, a latch and an instruction distribution circuit; the instruction distribution circuit is connected to the pulse generator, the counter and the latch; the pulse generator, the counter and the latch are connected in sequence; the counter counts the pulse signals transmitted by the pulse generator; The instruction distribution circuit is connected to the water level judgment circuit; the instruction distribution circuit receives and analyzes the control signal transmitted by the water level judgment circuit, and controls the pulse generator, the counter and the latch to work according to the analysis result; The latch is connected to the processor; the latch reads the timing data of the counter and transmits the timing data to the processor.

4. The super-high water level early warning device for a well lid according to claim 3, characterized in that, The instruction distribution circuit comprises an XOR gate and a NOT gate; two input ends of the XOR gate are connected to the water level judgment circuit; the output end of the XOR gate is connected to the reset end of the pulse generator and the input end of the NOT gate; the output end of the NOT gate is connected to the enable end of the latch; one input end of the XOR gate is connected to the reset end of the counter.

5. The super-high water level warning device for a well lid according to claim 3, characterized in that, The latch is a D-latch; the model of the D-latch is 74LS75.

6. The super-high water level warning device for a well lid according to claim 1, characterized in that, The first judgment circuit comprises a first comparator and a first threshold circuit; one input end of the first comparator serves as the input end of the first judgment circuit; two input ends of the first comparator are connected to the first threshold circuit; the output end of the first comparator serves as the output end of the first judgment circuit; The second judgment circuit comprises a second comparator and a second threshold circuit; the input end of the second comparator serves as the input end of the second judgment circuit; two input ends of the second comparator are connected to the second threshold circuit; the output end of the second comparator serves as the output end of the second judgment circuit. The voltage signal output by the first threshold circuit is smaller than the voltage signal output by the second threshold circuit.

7. The super-high water level warning device for a well lid according to claim 6, characterized in that, The model of the first comparator and the second comparator is LM358.

8. The super-high water level warning device for a well lid according to claim 1, characterized in that, The water level sensor comprises an ultrasonic sensor, and an output end of the ultrasonic sensor is connected with the water level judgment circuit.

9. The super-high water level warning device for a well lid according to claim 1, characterized in that, The processor comprises a master control chip, and the model of the master control chip is STM32F030F4P6TR.

10. The super-high water level warning device for a well lid according to claim 1, characterized in that, The communication module comprises a communication chip, and the model of the communication chip is SIM300C.

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