Operation and maintenance monitoring device for Internet of Things monitoring station

Abstract

The utility model relates to the technical field of circuits, in particular to an internet of things monitoring station operation and maintenance monitoring device, which comprises a control module, a communication module, an acquisition module and a detection module, and is characterized in that the control module comprises a central processing unit (CPU); the communication module comprises a 4G communication circuit, and the 4G communication circuit is electrically connected with the CPU processor; the acquisition module comprises an NTC (Negative Temperature Coefficient) temperature acquisition circuit; the NTC temperature acquisition circuit is electrically connected with the CPU processor; the detection module comprises a water leakage detection circuit, a door detection circuit, a direct current and voltage detection circuit, a direct current power supply signal detection circuit, an alternating current and voltage detection circuit and an alternating current power supply signal detection circuit. The operation and maintenance efficiency is greatly improved, the dependence on manual inspection is reduced, and faults can be responded and processed in time.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit design, in particular to an operation and maintenance monitoring device for an Internet of Things monitoring station. Background Art

[0002] With the rapid development of Internet of Things technology, intelligent operation and maintenance is increasingly widely applied in various industries. Operation and maintenance rely on sensors, data collection and analysis technologies to improve the operation efficiency of equipment and reduce downtime by monitoring the equipment status in real time, predicting faults and providing maintenance suggestions. However, the popularization and application of intelligent operation and maintenance fault diagnosis devices in the current market are restricted by many factors. In particular, the high cost and low-efficiency operation and maintenance mode have become the main challenges.

[0003] The existing intelligent operation and maintenance fault diagnosis devices are costly, mainly because they rely on complex hardware configurations and high-performance computing resources. These devices usually need to be equipped with advanced digital signal processing (DSP) chips, large-capacity memories, as well as complex protocol parsing components and network modules to achieve real-time monitoring of front-end device signals, data transmission and background analysis. The integration of these high-cost hardware not only increases the production cost of the devices, but also directly leads to an increase in the market price. In sharp contrast, the overall maintenance cost of the Internet of Things monitoring and operation and maintenance industry is relatively low, which makes it difficult for high-cost intelligent operation and maintenance devices to be widely accepted in the market, restricting the further development of the industry.

[0004] In addition, the overall operation and maintenance efficiency of the Internet of Things monitoring and operation and maintenance industry is relatively low, and a large number of service providers still rely on traditional manual inspections and fault handling methods. Due to the low maintenance cost, enterprises often neglect the investment in intelligent operation and maintenance, resulting in the industry still being in the stage of passive operation and maintenance as a whole. The traditional operation and maintenance mode is not only inefficient, but also has problems such as untimely response and difficulty in remote monitoring, and cannot meet the needs of modern operation and maintenance.

[0005] To address these problems, there is an urgent need for an Internet of Things monitoring station box monitoring device that can balance cost and efficiency. By optimizing the hardware configuration and simplifying the data processing process, the device cost can be reduced while the operation and maintenance efficiency can be improved. This can not only accelerate the popularization of intelligent operation and maintenance devices in the market, but also provide a solid foundation for the technological innovation and service upgrade of the industry. Summary of the Utility Model

[0006] The utility model provides an operation and maintenance monitoring device for an Internet of Things monitoring station to solve the problems existing in the prior art.

[0007] The utility model is realized through the following technical solutions:

[0008] An operation and maintenance monitoring device for an Internet of Things monitoring station, comprising a control module, a communication module, a collection module and a detection module, wherein the control module includes a CPU processor;

[0009] The communication module includes a 4G communication circuit, and the 4G communication circuit is electrically connected to the CPU processor;

[0010] The collection module includes an NTC temperature collection circuit, and the NTC temperature collection circuit is electrically connected to the CPU processor;

[0011] The detection module includes a water leakage detection circuit, a door detection circuit, a DC current and voltage detection circuit, a DC power signal detection circuit, an AC current and voltage detection circuit, and an AC power signal detection circuit. The water leakage detection circuit, the door detection circuit, the DC current and voltage detection circuit, the DC power signal detection circuit, the AC current and voltage detection circuit, and the AC power signal detection circuit are respectively electrically connected to the CPU processor. The DC current and voltage detection circuit is electrically connected to the DC power signal detection circuit, and the AC current and voltage detection circuit is electrically connected to the AC power signal detection circuit;

[0012] The CPU processor includes a CPU chip U6, and the model of the CPU chip U6 is STC8H8K64U;

[0013] The 4G communication circuit includes a wireless communication chip U20, the model of the wireless communication chip U20 is EC800K-CN, and the wireless communication chip U20 is electrically connected to the CPU chip U6.

[0014] Further, the NTC temperature collection circuit includes a capacitor C17 and a resistor R18. One end of the capacitor C17 is respectively connected to pin 2 of the CPU chip U6, one end of the resistor R18, and pin 1 of the connector P4. The other end of the capacitor C17 is grounded, and the other end of the resistor R18 is connected to the 3.3V voltage terminal.

[0015] Further, the water leakage detection circuit includes a voltage comparator U15. Pin 1 of the voltage comparator U15 is connected to pin 22 of the CPU chip U6. Pin 2 of the voltage comparator U15 is respectively connected to one end of a capacitor C29, one end of a resistor R60, and pin 1 of the connector P21. The other end of the capacitor C29 is grounded, and the other end of the resistor R60 is connected to the 3.3V voltage terminal. Pin 8 of the voltage comparator U15 is respectively connected to the 3.3V voltage terminal and one end of a capacitor C32, and the other end of the capacitor C32 is grounded.

[0016] Further, the door detection circuit includes a resistor R93. One end of the resistor R93 is connected to pin 1 of the connector P2. Pin 2 of the connector P2 is connected to pin 31 of the CPU chip U6. The other end of the resistor R93 is connected to the 3.3V voltage terminal.

[0017] Further, the DC current and voltage detection circuit includes a DC current and voltage detection chip U14, the model of the DC current and voltage detection chip U14 is BL0972, the pin 1 of the DC current and voltage detection chip U14 is respectively connected to one end of a capacitor C50, one end of a resistor R51, and one end of a resistor R56. The other end of the capacitor C50 is connected to the other end of the resistor R56 and then grounded. The other end of the resistor R51 is respectively connected to the pin 2 of a connector P8 and a first switch circuit;

[0018] The pin 20 of the DC current and voltage detection chip U14 is respectively connected to one end of a capacitor C48, one end of a resistor R55, the pin 1 of a connector P8, one end of a resistor R47, one end of a resistor R48, and the pin 1 of a connector P7;

[0019] The other end of the resistor R47 is connected to the pin 16 of the DC current and voltage detection chip U14, and the other end of the resistor R48 is connected to the pin 17 of the DC current and voltage detection chip U14;

[0020] The pin 5 of the DC current and voltage detection chip U14 is connected to the pin 46 of a CPU chip U6, the pin 6 of the DC current and voltage detection chip U14 is connected to the pin 48 of the CPU chip U6, the pin 7 of the DC current and voltage detection chip U14 is connected to the pin 49 of the CPU chip U6, the pin 8 of the DC current and voltage detection chip U14 is connected to the pin 50 of the CPU chip U6, the pin 9 of the DC current and voltage detection chip U14 is connected to the pin 43 of the CPU chip U6, the pin 12 of the DC current and voltage detection chip U14 is connected to the pin 42 of the CPU chip U6, and the pin 11 of the DC current and voltage detection chip U14 is connected to the pin 41 of the CPU chip U6.

[0021] Further, the first switch circuit includes a relay JK2. The pin 3 of the relay JK2 is connected to the other end of the resistor R51. The pin 4 of the relay JK2 is connected to a DC power signal detection circuit. The pin 2 of the relay JK2 is connected to the cathode of a diode D12. The anode of the diode D12 is respectively connected to the pin 1 of the relay JK2 and the collector of a triode Q3. The base of the triode Q3 is respectively connected to one end of a resistor R58 and one end of a resistor R59. The other end of the resistor R59 is connected to the pin 54 of the CPU chip U6.

[0022] Further, the DC power signal detection circuit includes a resistor R46. One end of the resistor R46 is connected to the pin 4 of the relay JK2. The other end of the resistor R46 is respectively connected to one end of a resistor R53 and the base of a triode Q4. The other end of the resistor R53 is connected to the emitter of the triode Q4. The collector of the triode Q4 is respectively connected to one end of a resistor R52 and the pin 58 of the CPU chip U6. The other end of the resistor R52 is connected to a 3.3V voltage terminal.

[0023] Further, the AC current and voltage detection circuit includes an AC current and voltage detection chip U10, and the model of the AC current and voltage detection chip U10 is BL0942. The 2nd pin of the AC current and voltage detection chip U10 is respectively connected to one end of a resistor R28, and the other end of the resistor R28 is respectively connected to one end of a resistor R25 and the 1st pin of a connector P6. The other end of the resistor R25 is respectively connected to one end of a resistor R27 and the 1st pin of a connector P9. The other end of the resistor R27 is connected to the 3rd pin of the AC current and voltage detection chip U10. The 4th pin of the AC current and voltage detection chip U10 is respectively connected to one end of a resistor R31 and one end of a resistor R26. The other end of the resistor R26 is respectively connected to the 2nd pin of the connector P9 and a second switch circuit;

[0024] The 10th pin of the AC current and voltage detection chip U10 is connected to the 32nd pin of a CPU chip U6. The 9th pin of the AC current and voltage detection chip U10 is connected to the 33rd pin of the CPU chip U6. The 6th pin of the AC current and voltage detection chip U10 is connected to the 26th pin of the CPU chip U6. The 8th pin of the AC current and voltage detection chip U10 is connected to one end of a resistor R120. The other end of the resistor R120 is connected to one end of a resistor R42 and then grounded. The other end of the resistor R42 is connected to the 7th pin of the AC current and voltage detection chip U10.

[0025] Further, the second switch circuit includes a relay JK1. The 3rd pin of the relay JK1 is connected to the 2nd pin of the connector P9. The 4th pin of the relay JK1 is connected to an AC power signal detection circuit. The 2nd pin of the relay JK1 is connected to the cathode of a diode D29. The anode of the diode D29 is respectively connected to the 1st pin of the relay JK1 and the collector of a triode Q2. The base of the triode Q2 is respectively connected to one end of a resistor R32 and one end of a resistor R33. The other end of the resistor R32 is connected to the 51st pin of the CPU chip U6.

[0026] Further, the AC power signal detection circuit includes a diode D28. The anode of the diode D28 is connected to the 4th pin of the relay JK1. The cathode of the diode D28 is connected to one end of a resistor R29. The other end of the resistor R29 is coupled to the 1st pin of a coupler U13. The 2nd pin of the coupler U13 is connected to the 1st pin of the connector P6. The 4th pin of the coupler U13 is respectively connected to one end of a resistor R30 and the 55th pin of the CPU chip U6.

[0027] Advantages of the utility model:

[0028] (1) An operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the utility model can monitor the voltage and current states of DC and AC circuits in real time. When the current or voltage value exceeds the set safety threshold, or other abnormal situations occur, the device reports an alarm signal through a communication module and automatically cuts off the power supply of the relevant circuit, protecting the front-end equipment to the greatest extent and avoiding equipment damage or potential safety hazards;

[0029] (2) An operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model can monitor the temperature inside the front protection box to ensure that the devices inside the box operate in a safe temperature environment.

[0030] (3) An operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model has an opening and closing state detection function. When the box door is opened, the device can immediately report an alarm signal, enhancing the security of the device and preventing unauthorized operations or the influence of external factors on the device.

[0031] (4) An operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model can detect whether there is water immersion inside the box. When water immersion is detected, the device will automatically report an alarm signal, timely reminding the user to take measures to avoid damage to the device caused by water immersion.

[0032] (5) An operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model realizes remote real-time monitoring and automatic fault handling through a communication module and a control module, greatly improving the operation and maintenance efficiency, reducing the dependence on manual inspections, and being able to respond to and handle faults in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0034] Figure 1 It is the overall structure block diagram of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model;

[0035] Figure 2 It is the circuit schematic diagram of the CPU chip of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model;

[0036] Figure 3 It is the 4G communication circuit principle of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model Figure 1 ;

[0037] Figure 4 It is the 4G communication circuit principle of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model Figure 2 ;

[0038] Figure 5 It is the 4G communication circuit principle of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model Figure 3 ;

[0039] Figure 6 4G communication circuit principle of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model Figure 4 ;

[0040] Figure 7 NTC temperature acquisition circuit schematic diagram of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model;

[0041] Figure 8 Leakage detection circuit schematic diagram of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model;

[0042] Figure 9 Door detection circuit schematic diagram of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model;

[0043] Figure 10 DC current and voltage detection circuit, first switch, circuit, DC power supply signal detection circuit schematic diagram of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model;

[0044] Figure 11 AC current and voltage detection circuit, second switch, circuit, AC power supply signal detection circuit schematic diagram of an operation and maintenance monitoring device for an Internet of Things monitoring station proposed by the present utility model. Specific embodiments

[0045] In order to make the purpose, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and are not intended to limit the present utility model.

[0046] Embodiment 1

[0047] Refer to Figures 1 - 11 , an operation and maintenance monitoring device for an Internet of Things monitoring station, including a control module, a communication module, a collection module and a detection module, and the control module includes a CPU processor;

[0048] The communication module includes a 4G communication circuit, and the 4G communication circuit is electrically connected to the CPU processor;

[0049] The collection module includes an NTC temperature collection circuit, and the NTC temperature collection circuit is electrically connected to the CPU processor;

[0050] The detection module includes a water leakage detection circuit, a door detection circuit, a DC current and voltage detection circuit, a DC power signal detection circuit, an AC current and voltage detection circuit, and an AC power signal detection circuit. The water leakage detection circuit, the door detection circuit, the DC current and voltage detection circuit, the DC power signal detection circuit, the AC current and voltage detection circuit, and the AC power signal detection circuit are respectively electrically connected to the CPU processor. The DC current and voltage detection circuit is electrically connected to the DC power signal detection circuit, and the AC current and voltage detection circuit is electrically connected to the AC power signal detection circuit;

[0051] The CPU processor includes a CPU chip U6, and the model of the CPU chip U6 is STC8H8K64U;

[0052] In this embodiment, the 4G communication circuit includes wireless communication chips U20A, U20B, and U20C, which are mainly used for data communication with an external network to realize data upload and download, so that the monitoring device can communicate with a remote server or other devices in real time.

[0053] The model of the wireless communication chip U20 is EC800K-CN, and the wireless communication chip U20 is electrically connected to the CPU chip U6. Specifically:

[0054] Pin 2 of the wireless communication chip U20A is respectively connected to one end of a capacitor C84 and one end of a resistor R104. The other end of the resistor R104 is respectively connected to one end of a capacitor C85 and one end of a capacitor C36. The other end of the capacitor C36 is connected to the cathode of a TVS diode D21 and a radio frequency coaxial connector J1. Pin 7 of the wireless communication chip U20A is respectively connected to one end of a capacitor C79 and the collector of a triode Q8. The base of the triode Q8 is respectively connected to one end of a resistor R108 and one end of a resistor R109. The other end of the resistor R109 is connected to the emitter of the triode Q8. The other end of the resistor R108 is connected to pin 13 of the CPU chip U6. Pin 35 of the wireless communication chip U20A is connected to one end of a capacitor C86 and one end of a resistor R116. The other end of the resistor R116 is connected to one end of a capacitor C87, the cathode of a TVS diode D24, and a radio frequency coaxial connector J2;

[0055] The capacitors C84, C85, C36, C86, C87 and the TVS diodes D21, D24 are used to filter and protect the wireless communication signals to ensure signal stability and avoid damage to the chip caused by external overvoltage.

[0056] The radio frequency coaxial connectors J1 and J2 are connected to the antenna, which is mainly used to transmit wireless radio frequency signals. At the same time, the TVS diode is used to protect the chip from electromagnetic interference and voltage surges.

[0057] Pin 15 of the wireless communication chip U20A is respectively connected to one end of the capacitor C80 and the collector of the triode Q11. The base of the triode Q11 is respectively connected to one end of the resistor R117 and one end of the resistor R118. The other end of the resistor R118 is connected to the emitter of the triode Q8, and the other end of the resistor R117 is connected to pin 12 of the CPU chip U6;

[0058] Pin 25 of the wireless communication chip U20A is connected to one end of the resistor R112. The other end of the resistor R112 is connected to one end of the resistor R114 and the base of the triode Q9. The emitter of the triode Q9 is connected to the other end of the resistor R114. The collector of the triode Q9 is connected to the cathode of the light-emitting diode D22. The anode of the light-emitting diode D22 is connected to one end of the resistor R110. The other end of the resistor R110 is connected to the 3.8V voltage terminal. Pin 16 of the wireless communication chip U20A is connected to one end of the resistor R113. The other end of the resistor R113 is connected to one end of the resistor R115 and the base of the triode Q10. The emitter of the triode Q10 is connected to the other end of the resistor R115. The collector of the triode Q10 is connected to the cathode of the light-emitting diode D23. The anode of the light-emitting diode D23 is connected to one end of the resistor R111. The other end of the resistor R111 is connected to the 3.8V voltage terminal; The triodes Q8, Q11, Q9, and Q10 are respectively connected to the CPU processor U6, mainly used to drive different circuits and light-emitting diode (LED) indicators. By controlling the above triodes through the CPU, the working state of the wireless communication chip and the on / off state of the indicator lights are realized, used to display the communication state or fault indication. The resistors R104, R108, R109, R116, R117, and R118 play the role of current limiting and voltage division, ensuring the stability of the control signal and the normal operation of the circuit.

[0059] Pin 12 of the wireless communication chip U20A is connected to one end of the resistor R95. The other end of the resistor R95 is connected to one end of the capacitor C68 and pin 7 of the SIM card U21. The other end of the capacitor C68 is connected to one end of the capacitor C74 and one end of the capacitor C75. The other end of the capacitor C74 is connected to one end of the resistor R96 and pin 6 of the SIM card U21. The other end of the resistor R96 is connected to pin 13 of the wireless communication chip U20A. The other end of the capacitor C75 is connected to one end of the resistor R97, pin 3 of the SIM card U21, and one end of the resistor R94. The other end of the resistor R97 is connected to pin 11 of the wireless communication chip U20A. The SIM card U21 is responsible for storing the identity authentication information required for communication. U20A is connected to each pin of the SIM card through a resistor and capacitor network to ensure the normal progress of communication and prevent signal interference. The light-emitting diodes D22 and D23 are connected to the triodes Q9 and Q10 and are controlled by the CPU. These LED lights can be used to indicate the working state of the wireless communication module, such as whether the communication is normal, whether the data is successfully sent or received, etc.

[0060] The NTC temperature acquisition circuit includes a capacitor C17 and a resistor R18. One end of the capacitor C17 is respectively connected to pin 2 of the CPU chip U6, one end of the resistor R18, and pin 1 of the connector P4. The other end of the capacitor C17 is grounded. The other end of the resistor R18 is connected to the 3.3V voltage terminal. The external connection of the connector P4 is connected to the NTC thermistor sensor to achieve temperature acquisition.

[0061] The water leakage detection circuit includes a voltage comparator U15. Pin 1 of the voltage comparator U15 is connected to pin 22 of the CPU chip U6. Pin 2 of the voltage comparator U15 is respectively connected to one end of a capacitor C29, one end of a resistor R60, and pin 1 of the connector P21. The other end of the capacitor C29 is grounded. The other end of the resistor R60 is connected to the 3.3V voltage terminal. Pin 8 of the voltage comparator U15 is respectively connected to the 3.3V voltage terminal and one end of a capacitor C32. The other end of the capacitor C32 is grounded.

[0062] The voltage comparator U15 is used to compare the input voltage signals and output high and low level signals for the CPU to read. Pin 1 of U15 is connected to pin 22 of the CPU chip U6 as the connection point of the output signal. Pin 2 of U15 is connected to the resistor R60 and the capacitor C29 to form an input signal path. Pin 1 of P21 is connected to an external detector through this path. In this embodiment, it can be an electrode placed in the area where water leakage may occur. The resistor R60 is connected to the 3.3V voltage terminal to provide a reference voltage. The capacitor C32 is connected to pin 8 of U15 for power supply filtering to ensure the stable operation of the voltage comparator. The voltage comparator U15 compares the two input voltage signals. If the voltage at pin 2 is lower than a certain reference voltage, U15 will output a low level signal; if it is higher than the reference voltage, it will output a high level signal, and pin 1 of P21 is connected to the water leakage detection electrode. Under normal circumstances, if there is no water, the resistance between the detection electrodes is very high, resulting in the voltage at pin 2 of U15 approaching 3.3V because there is no obvious voltage drop across R60. When water leakage occurs, the conductivity of the water body will cause a path to form between the detection electrodes, thereby reducing the voltage at pin 2 of U15. At this time, the voltage comparator will detect that the voltage at pin 2 is lower than a certain threshold voltage and output a low level signal. The CPU chip U6 reads the output signal of the comparator by connecting to pin 1 of U15. When U15 outputs a low level signal, it indicates that water leakage has been detected; when a high level signal is output, it indicates that there is no water leakage. The CPU can trigger an alarm, record a log, or perform other operations based on this signal, such as turning off the power or starting a pumping device.

[0063] The door detection circuit includes a resistor R93. One end of the resistor R93 is connected to pin 1 of the connector P2. Pin 2 of the connector P2 is connected to pin 31 of the CPU chip U6. The other end of the resistor R93 is connected to the 3.3V voltage terminal. The external of the connector P2 is connected to a Hall sensor. The Hall sensor is arranged at the fixed end of the door. A magnet is arranged at the movable end of the door. When the magnet approaches the Hall sensor, the Hall sensor outputs a door closing signal, and the signal is connected to the CPU chip through pin 2 of the connector P2.

[0064] The DC current and voltage detection circuit includes a DC current and voltage detection chip U14. The model of the DC current and voltage detection chip U14 is BL0972. Pin 1 of the DC current and voltage detection chip U14 is respectively connected to one end of a capacitor C50, one end of a resistor R51, and one end of a resistor R56. The other end of the capacitor C50 is connected to the other end of the resistor R56 and then grounded. The other end of the resistor R51 is respectively connected to pin 2 of the connector P8 and a first switch circuit;

[0065] Pin 20 of the DC current and voltage detection chip U14 is respectively connected to one end of a capacitor C48, one end of a resistor R55, pin 1 of the connector P8, one end of a resistor R47, one end of a resistor R48, and pin 1 of the connector P7;

[0066] The other end of the resistor R47 is connected to pin 16 of the DC current and voltage detection chip U14, and the other end of the resistor R48 is connected to pin 17 of the DC current and voltage detection chip U14;

[0067] Pin 5 of the DC current and voltage detection chip U14 is connected to pin 46 of the CPU chip U6, pin 6 of the DC current and voltage detection chip U14 is connected to pin 48 of the CPU chip U6, pin 7 of the DC current and voltage detection chip U14 is connected to pin 49 of the CPU chip U6, pin 8 of the DC current and voltage detection chip U14 is connected to pin 50 of the CPU chip U6, pin 9 of the DC current and voltage detection chip U14 is connected to pin 43 of the CPU chip U6, pin 12 of the DC current and voltage detection chip U14 is connected to pin 42 of the CPU chip U6, and pin 11 of the DC current and voltage detection chip U14 is connected to pin 41 of the CPU chip U6.

[0068] The DC current and voltage detection chip U14 is used to measure the DC current and voltage in the circuit. The connection of pin 20 of U14 with resistors, capacitors and connectors is for signal stabilization and filtering processing to ensure the accuracy and anti-interference ability of current and voltage measurement. The connection of the resistors R47 and R48 is for voltage division or current limiting to ensure that the signal level is suitable for the input range of the detection chip U14.

[0069] The first switch circuit includes a relay JK2. The 3rd pin of the relay JK2 is connected to the other end of a resistor R51. The 4th pin of the relay JK2 is connected to a DC power supply signal detection circuit. The 2nd pin of the relay JK2 is connected to the cathode of a diode D12. The anode of the diode D12 is respectively connected to the 1st pin of the relay JK2 and the collector of a triode Q3. The base of the triode Q3 is respectively connected to one end of a resistor R58 and one end of a resistor R59. The other end of the resistor R59 is connected to the 54th pin of a CPU chip U6.

[0070] The relay JK2 plays a role in controlling the on / off of the circuit, that is, it can control the working state of the DC power supply signal detection circuit.

[0071] The 4th pin of the relay JK2 is connected to the DC power supply signal detection circuit, and its state (open or closed) directly affects the on / off of the detection circuit. The triode Q3 is connected to the relay JK2 and is controlled by the CPU (connected to the 54th pin of U6 through R59). When the CPU outputs a signal to turn on Q3, the coil of the relay JK2 is energized, and the relay contacts will switch, thus realizing the switching operation of the circuit.

[0072] The DC power supply signal detection circuit includes a resistor R46. One end of the resistor R46 is connected to the 4th pin of the relay JK2. The other end of the resistor R46 is respectively connected to one end of a resistor R53 and the base of a triode Q4. The other end of the resistor R53 is connected to the emitter of the triode Q4. The collector of the triode Q4 is respectively connected to one end of a resistor R52 and the 58th pin of the CPU chip U6. The other end of the resistor R52 is connected to a 3.3V voltage terminal.

[0073] Components such as the resistors R46, R53, and the triode Q4 form a DC power supply signal detection circuit, which is mainly used to monitor the state of the DC power supply. The base of Q4 receives the state of the DC power supply signal through the resistor R46. When there is a signal in the DC power supply, Q4 may conduct, and then output a signal to the CPU (the 58th pin of U6) through the collector, enabling the CPU to judge the current power supply state. The resistor R52 is connected to the 3.3V voltage terminal to provide a reference voltage for the entire detection circuit to ensure the stable working state of the triode Q4.

[0074] The DC current and voltage detection chip U14 is connected to multiple pins of the CPU chip U6 to transmit the real-time measured DC current and voltage information, enabling the system to monitor the changes in current and voltage in real time.

[0075] The first switch circuit realizes the control of the DC power supply signal through the combination of a relay and a triode, and can open or close the circuit when needed to protect the system or perform specific operations.

[0076] The DC power supply signal detection circuit monitors the status of the DC power supply, ensures that the system works properly when there is a power supply signal, and promptly feedbacks to the CPU when there is a problem with the power supply, so that the system can make corresponding processing.

[0077] The AC current and voltage detection circuit includes an AC current and voltage detection chip U10, and the model of the AC current and voltage detection chip U10 is BL0942. The 2nd pin of the AC current and voltage detection chip U10 is respectively connected to one end of a resistor R28, and the other end of the resistor R28 is respectively connected to one end of a resistor R25 and the 1st pin of a connector P6. The other end of the resistor R25 is respectively connected to one end of a resistor R27 and the 1st pin of a connector P9. The other end of the resistor R27 is connected to the 3rd pin of the AC current and voltage detection chip U10. The 4th pin of the AC current and voltage detection chip U10 is respectively connected to one end of a resistor R31 and one end of a resistor R26. The other end of the resistor R26 is respectively connected to the 2nd pin of the connector P9 and a second switch circuit;

[0078] The 10th pin of the AC current and voltage detection chip U10 is connected to the 32nd pin of the CPU chip U6, the 9th pin of the AC current and voltage detection chip U10 is connected to the 33rd pin of the CPU chip U6, the 6th pin of the AC current and voltage detection chip U10 is connected to the 26th pin of the CPU chip U6, the 8th pin of the AC current and voltage detection chip U10 is connected to one end of a resistor R120, and the other end of the resistor R120 is connected to one end of a resistor R42 and then grounded, and the other end of the resistor R42 is connected to the 7th pin of the AC current and voltage detection chip U10.

[0079] The AC current and voltage detection chip U10 can output the measurement result to the CPU in the form of a digital signal. The connection of the resistors R28, R25, and R27 forms a voltage dividing network for the input signal, which is responsible for adjusting the AC voltage signal to the voltage range that BL0942 can process.

[0080] The 2nd pin and the 3rd pin of the current and voltage detection chip U10 respectively receive the adjusted AC voltage signal, and the 4th pin is connected to R31 and R26 for the input of a reference voltage or other relevant signals.

[0081] The 10th pin, 9th pin, and 6th pin of U10 are respectively connected to different pins of the CPU chip U6, indicating that the current and voltage detection chip U10 sends the digital signals of the measured AC current and voltage to the CPU for further processing and monitoring by the system.

[0082] The resistors R120 and R42 are used to adjust or filter the input or output signals of BL0942 to ensure the stability and accuracy of the signals.

[0083] The second switch circuit includes a relay JK1. The 3rd pin of the relay JK1 is connected to the 2nd pin of a connector P9. The 4th pin of the relay JK1 is connected to an AC power signal detection circuit. The 2nd pin of the relay JK1 is connected to the cathode of a diode D29. The anode of the diode D29 is respectively connected to the 1st pin of the relay JK1 and the collector of a triode Q2. The base of the triode Q2 is respectively connected to one end of a resistor R32 and one end of a resistor R33. The other end of the resistor R32 is connected to the 51st pin of a CPU chip U6.

[0084] The relay JK1 is used to control the on / off of the AC power signal detection circuit. By controlling the working state of the relay, the system can selectively turn on or off the monitoring of the AC power signal.

[0085] The triode Q2 works in cooperation with the relay JK1 and is controlled by the CPU. The CPU determines whether to energize the relay to control the on / off of the circuit by controlling the base of Q2.

[0086] The AC power signal detection circuit includes a diode D28. The anode of the diode D28 is connected to the 4th pin of the relay JK1. The cathode of the diode D28 is connected to one end of a resistor R29. The other end of the resistor R29 is coupled to the 1st pin of a coupler U13. The 2nd pin of the coupler U13 is connected to the 1st pin of a connector P6. The 4th pin of the coupler U13 is respectively connected to one end of a resistor R30 and the 55th pin of the CPU chip U6.

[0087] The diode D28 is connected to the 4th pin of the relay JK1 and is responsible for detecting the AC power signal. The AC power signal passes through D28 and is further transmitted to the coupler U13. The coupler U13 is used to isolate and convert the AC signal into a low-level signal suitable for processing, thereby protecting the subsequent circuit from high-voltage interference. The output signal of U13 is transmitted to the CPU chip U6 through R30 for judging the current state of the AC power supply.

[0088] An AC current and voltage detection chip U10 is responsible for accurately measuring the AC current and voltage in the system and transmitting these measurement results to the CPU. The CPU can regulate the system based on these data, such as adjusting the power load and monitoring the operating state of the device.

[0089] The second switch circuit plays a role of switch control in the device, mainly used to control whether to turn on the detection of the AC power signal to ensure that the system can accurately monitor the power signal when needed.

[0090] The AC power signal detection circuit is responsible for detecting the presence or absence of the AC power supply and feeding back the detection result to the CPU through the coupler, so that the system can monitor the power supply state in real time.

[0091] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An IoT monitoring station operation and maintenance monitoring device, comprising a control module, a communication module, a collection module and a detection module, characterized in that: The control module includes a CPU processor; The communication module includes a 4G communication circuit, and the 4G communication circuit is electrically connected to the CPU processor; The acquisition module includes an NTC temperature acquisition circuit, and the NTC temperature acquisition circuit is electrically connected to the CPU processor; The detection module includes a water leakage detection circuit, a door detection circuit, a DC current and voltage detection circuit, a DC power signal detection circuit, an AC current and voltage detection circuit, and an AC power signal detection circuit. The water leakage detection circuit, the door detection circuit, the DC current and voltage detection circuit, the DC power signal detection circuit, the AC current and voltage detection circuit, and the AC power signal detection circuit are electrically connected to the CPU processor respectively, the DC current and voltage detection circuit is electrically connected to the DC power signal detection circuit, and the AC current and voltage detection circuit is electrically connected to the AC power signal detection circuit; The CPU processor includes a CPU chip U6, and the model of the CPU chip U6 is STC8H8K64U; The 4G communication circuit includes a wireless communication chip U20, the model of the wireless communication chip U20 is EC800K-CN, and the wireless communication chip U20 is electrically connected to the CPU chip U6.

2. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 1, characterized in that: The NTC temperature acquisition circuit includes a capacitor C17 and a resistor R18. One end of the capacitor C17 is connected to pin 2 of the CPU chip U6, one end of the resistor R18, and pin 1 of the connector P4. The other end of the capacitor C17 is grounded, and the other end of the resistor R18 is connected to the 3.3V voltage terminal.

3. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 1, characterized in that: The water leakage detection circuit includes a voltage comparator U15, wherein pin 1 of the voltage comparator U15 is connected to pin 22 of the CPU chip U6, pin 2 of the voltage comparator U15 is respectively connected to one end of a capacitor C29, one end of a resistor R60, and pin 1 of a connector P21, the other end of the capacitor C29 is grounded, the other end of the resistor R60 is connected to a 3.3V voltage terminal, and pin 8 of the voltage comparator U15 is respectively connected to the 3.3V voltage terminal and one end of a capacitor C32, and the other end of the capacitor C32 is grounded.

4. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 1, characterized in that: The gate detection circuit includes a resistor R93, one end of the resistor R93 is connected to pin 1 of connector P2, pin 2 of connector P2 is connected to pin 31 of CPU chip U6, and the other end of the resistor R93 is connected to a 3.3V voltage terminal.

5. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 1, characterized in that: The DC current and voltage detection circuit includes a DC current and voltage detection chip U14, the model of which is BL0972, and the pin 1 of the DC current and voltage detection chip U14 is respectively connected to one end of a capacitor C50, one end of a resistor R51, and one end of a resistor R56, the other end of the capacitor C50 is connected to the other end of the resistor R56 and then grounded, and the other end of the resistor R51 is respectively connected to the pin 2 of the connector P8 and the first switch circuit; Pin 20 of the DC current and voltage detection chip U14 is respectively connected to one end of capacitor C48, one end of resistor R55, pin 1 of connector P8, one end of resistor R47, one end of resistor R48, and pin 1 of connector P7; The other end of the resistor R47 is connected to the pin 16 of the DC current and voltage detection chip U14, and the other end of the resistor R48 is connected to the pin 17 of the DC current and voltage detection chip U14; Pin 5 of the DC current and voltage detection chip U14 is connected to pin 46 of the CPU chip U6, pin 6 of the DC current and voltage detection chip U14 is connected to pin 48 of the CPU chip U6, pin 7 of the DC current and voltage detection chip U14 is connected to pin 49 of the CPU chip U6, pin 8 of the DC current and voltage detection chip U14 is connected to pin 50 of the CPU chip U6, pin 9 of the DC current and voltage detection chip U14 is connected to pin 43 of the CPU chip U6, pin 12 of the DC current and voltage detection chip U14 is connected to pin 42 of the CPU chip U6, and pin 11 of the DC current and voltage detection chip U14 is connected to pin 41 of the CPU chip U6.

6. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 5, characterized in that: The first switching circuit includes a relay JK2, wherein pin 3 of the relay JK2 is connected to the other end of the resistor R51, pin 4 of the relay JK2 is connected to the DC power signal detection circuit, pin 2 of the relay JK2 is connected to the cathode of the diode D12, the anode of the diode D12 is respectively connected to pin 1 of the relay JK2 and the collector of the transistor Q3, the base of the transistor Q3 is respectively connected to one end of the resistor R58 and one end of the resistor R59, and the other end of the resistor R59 is connected to pin 54 of the CPU chip U6.

7. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 6, characterized in that: The DC power signal detection circuit includes a resistor R46, one end of which is connected to pin 4 of relay JK2, and the other end of which is respectively connected to one end of resistor R53 and the base of transistor Q4, the other end of which is connected to the emitter of transistor Q4, the collector of which is respectively connected to one end of resistor R52 and pin 58 of CPU chip U6, and the other end of which is connected to a 3.3V voltage terminal.

8. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 1, characterized in that: The AC current and voltage detection circuit includes an AC current and voltage detection chip U10, the model of the AC current and voltage detection chip U10 is BL0942, 2 pins of the AC current and voltage detection chip U10 are respectively connected to one end of a resistor R28, the other end of the resistor R28 is respectively connected to one end of a resistor R25 and pin 1 of a connector P6, the other end of the resistor R25 is respectively connected to one end of a resistor R27 and pin 1 of a connector P9, the other end of the resistor R27 is connected to pin 3 of the AC current and voltage detection chip U10, the 4 pins of the AC current and voltage detection chip U10 are respectively connected to one end of a resistor R31 and one end of a resistor R26, the other end of the resistor R26 is respectively connected to pin 2 of the connector P9 and the second switch circuit; Pin 10 of the AC current and voltage detection chip U10 is connected to pin 32 of the CPU chip U6, pin 9 of the AC current and voltage detection chip U10 is connected to pin 33 of the CPU chip U6, pin 6 of the AC current and voltage detection chip U10 is connected to pin 26 of the CPU chip U6, pin 8 of the AC current and voltage detection chip U10 is connected to one end of resistor R120, the other end of resistor R120 is connected to one end of resistor R42 and then grounded, and the other end of resistor R42 is connected to pin 7 of the AC current and voltage detection chip U10.

9. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 8, characterized in that: The second switch circuit includes a relay JK1, wherein pin 3 of the relay JK1 is connected to pin 2 of the connector P9, pin 4 of the relay JK1 is connected to the AC power signal detection circuit, pin 2 of the relay JK1 is connected to the cathode of the diode D29, the anode of the diode D29 is respectively connected to pin 1 of the relay JK1 and the collector of the transistor Q2, the base of the transistor Q2 is respectively connected to one end of the resistor R32 and one end of the resistor R33, and the other end of the resistor R32 is connected to pin 51 of the CPU chip U6.

10. The operation and maintenance monitoring device of an Internet of Things monitoring station according to claim 9, characterized in that: The AC power signal detection circuit includes a diode D28, the anode of the diode D28 is connected to the 4th pin of the relay JK1, the cathode of the diode D28 is connected to one end of the resistor R29, the other end of the resistor R29 is connected to the 1st pin of the coupler U13, the 2nd pin of the coupler U13 is connected to the 1st pin of the connector P6, and the 4th pin of the coupler U13 is respectively connected to one end of the resistor R30 and the 55th pin of the CPU chip U6.

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