Lightning suppressor health detection device based on WiFi-Mesh networking

Abstract

The utility model discloses a health detection device for a lightning suppressor based on WiFi-Mesh networking, which is connected with a mobile device and comprises an MCU (Microprogrammed Control Unit) main control circuit, the MCU main control circuit is connected with the mobile device, the MCU main control circuit is respectively connected with a BUCK step-down circuit and an isolating circuit, the BUCK step-down circuit is respectively connected with a power supply lightning protection circuit and a health detection circuit, and the isolating circuit is connected with a power supply lightning protection circuit. The power supply lightning protection circuit is connected with the health detection circuit, and the health detection circuit is also connected with the isolation circuit. According to the utility model, the problems of low detection efficiency and communication congestion during detection of the existing detection device are solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of lightning protection product testing devices, and relates to a lightning suppressor health testing device based on WiFi-Mesh networking. Background Technology

[0002] Currently, health checks for lightning suppressors include the following:

[0003] 1) Detection of non-intelligent lightning suppressors

[0004] Currently, most lightning protection product testing is done manually. When a lightning suppressor malfunctions, the product needs to be removed from the customer's site and tested step-by-step using multimeters and other testing tools. In cases where the destination is far away or the task is urgent, this can lead to long waiting times for the customer, project delays, and a decline in after-sales quality.

[0005] 2) Lightning suppressor testing with alarm system

[0006] Lightning suppressors with alarm systems employ a health monitoring solution that adds a fault indication system to each surge protection product. When a lightning suppressor malfunctions or is damaged, the fault indication system will trigger an alarm. However, this solution cannot remotely monitor the health status of the lightning suppressor, and it cannot pinpoint the exact component causing the fault.

[0007] 3) Lightning protection detection systems utilizing traditional wireless, Bluetooth, 4G, and other communication methods

[0008] Existing wireless communication lightning protection detection systems utilize traditional wireless, Bluetooth, and 4G technologies for online remote monitoring. Traditional wireless systems employ a single-hop network structure, requiring devices to share an access point (AP). If multiple devices connect simultaneously, network congestion can slow down system performance. Bluetooth communication technology has limited transmission distance and lower transmission speeds than Wi-Fi. 4G communication is expensive and consumes data rapidly. Utility Model Content

[0009] The purpose of this invention is to provide a lightning suppressor health detection device based on WiFi-Mesh networking, which solves the problems of low detection efficiency and communication congestion during detection in existing detection devices.

[0010] The technical solution adopted in this utility model is a lightning suppressor health detection device based on WiFi-Mesh networking, which is connected to a mobile device. It includes an MCU main control circuit, which is connected to the mobile device. The MCU main control circuit is connected to a BUCK step-down circuit and an isolation circuit. The BUCK step-down circuit is connected to a power supply lightning protection circuit and a health detection circuit. The power supply lightning protection circuit and the health detection circuit are connected. The health detection circuit is also connected to the isolation circuit.

[0011] The features of this utility model also include:

[0012] The MCU main control circuit includes a main control chip, which is connected to a π-type antenna networking circuit, crystal oscillator circuit Y1, crystal oscillator circuit Y2, power supply circuit, serial port circuit, and working indicator light circuit.

[0013] The π-type antenna networking circuit includes an inductor L1, an antenna element ANT, and an antenna element ANT1 connected in series with the main control chip. Capacitors C7 and C8 are connected to the two ends of the inductor L1 respectively. The antenna element ANT, capacitor C7, and capacitor C8 are all connected to digital ground DGND.

[0014] The main control chip model is ESP32-C3.

[0015] The BUCK step-down circuit includes step-down chip U1 and step-down chip U2, both of which are LM5164.

[0016] The VIN pin of the buck converter chip U1 is connected to the power supply lightning protection circuit and capacitor Cin1 respectively. Capacitor Cin1 is connected to digital ground. The EN / UVLO pin of the buck converter chip U1 is connected to resistor R1, which is connected in series with capacitor Cin1. The RON pin of the buck converter chip U1 is connected to resistor R3 and then connected to digital ground. The GND pin of the buck converter chip U1 is connected to digital ground. The SW pin of the buck converter chip U1 is connected to one end of inductor Lo1 in sequence. The other end of inductor Lo1 is connected to the main control chip. The BST pin of the buck converter chip U1 is connected to capacitor Cbst1. Capacitor Cbst1 is connected to inductor Lo1, and the connection end of capacitor Cbst1 and inductor Lo1 is located on the side where inductor Lo1 is connected to the SW pin. The connection end of inductor Lo1 and the main control chip is connected to feedback resistor R2 and feedback resistor R4 in sequence and then connected to digital ground. The FB pin of the buck converter chip U1 is connected between feedback resistor R2 and feedback resistor R4.

[0017] The VIN pin of the buck converter chip U2 is connected to the power supply lightning protection circuit and capacitor Cin2, respectively. Capacitor Cin2 is grounded. The EN / UVLO pin of the buck converter chip U2 is connected to resistor R5, which is connected in series with capacitor Cin2. The RON pin of the buck converter chip U2 is connected to resistor R7 and then grounded. The GND pin of the buck converter chip U2 is grounded. The SW pin of the buck converter chip U2 is connected to one end of inductor Lo2 in sequence. The other end of inductor Lo2 is connected to the health detection circuit. The BST pin of the buck converter chip U2 is connected to capacitor Cbst2, which is connected to inductor Lo2. The connection end of capacitor Cbst2 and inductor Lo2 is located on the side where inductor Lo2 is connected to the SW pin. The connection end of inductor Lo2 and the health detection circuit is connected to feedback resistors R6 and R8 in sequence and then grounded. The FB pin of the buck converter chip U2 is connected between feedback resistors R6 and R8.

[0018] The power supply lightning protection circuit includes a TVS diode. One end of the TVS diode is provided with a positive power input terminal and a positive power output terminal, and the other end is connected to ground. The positive power output terminal is connected to the VIN pin of the buck chip U1 and the VIN pin of the buck chip U2 through capacitors Cin1 and Cin2 of the BUCK buck circuit, respectively.

[0019] The isolation circuit includes a multi-channel isolation chip π140U. The VDD1 pin of the multi-channel isolation chip π140U is connected to the inductor Lo2 of the BUCK buck circuit through capacitor C3. One end of capacitor C3 is connected to inductor Lo2, and the other end is grounded. The VDD2 pin of the multi-channel isolation chip π140U is connected to the inductor Lo1 of the BUCK buck circuit through capacitor C4. One end of capacitor C4 is connected to inductor Lo1, and the other end is connected to digital ground. The GND1 pin of the multi-channel isolation chip π140U is grounded. The GND2 pin of the multi-channel isolation chip π140U is connected to digital ground. The VOA pin of the multi-channel isolation chip π140U is connected to the MTMS / IO4 pin of the main control chip. The VOB pin of the multi-channel isolation chip π140U is connected to the MTMS / IO5 pin of the main control chip.

[0020] The health monitoring circuit includes a comparator chip TS3021. The IN+ pin of the TS3021 is connected to resistors R16 and R11. Resistor R11 is connected to the negative terminal of a reverse protection diode D5. The positive terminal of the reverse protection diode D5 is connected to the inductor Lo2 and capacitor C6 of the BUCK step-down circuit. Capacitor C6 is grounded. The IN- pin of the TS3021 is connected to resistors R14 and R12. Resistor R14 is connected to resistor R13. Resistor R13 is connected to the TVS diode of the power supply lightning protection circuit. One end of the tube is connected to ground. Resistor R15 is connected between resistor R16 and resistor R13. Resistors R16 and R15 are grounded. The VCC+ pin of comparator chip TS3021 is connected to the inductor Lo2 of BUCK buck circuit. The VCC- pin of comparator chip TS3021 is grounded. The OUT pin of comparator chip TS3021 is connected to resistors R17 and R19 in sequence. Resistors R17 and R19 are both connected to the VIA pin of multi-channel isolation chip π140U. Resistor R19 is grounded.

[0021] The number of power supply lightning protection circuits and health detection circuits are equal, and they are connected in a one-to-one correspondence.

[0022] The beneficial effects of this utility model are:

[0023] 1) Combining lightning suppressors with π-type antenna networking

[0024] Lightning suppressors are passive surge protection devices, and the efficiency of after-sales maintenance has not been adequately addressed. Therefore, this utility model's power supply lightning suppressor health detection device integrates lightning suppressors with π-type antenna networking technology, solving the problem that surge protection products must be regularly maintained and fault located by on-site disassembly. The combination of lightning protection and the Internet of Things aligns with the trend of innovative development of electronic products in multiple cross-domain directions.

[0025] 2) The health monitoring parameters for the lightning suppressor include statistics on the number of lightning strikes (i.e., the number of reverse breakdowns of the TVS diode).

[0026] In addition to detecting whether TVS diodes are faulty or short-circuited, the detection device of this invention can also detect the number of lightning surges. TVS diodes may experience performance degradation or damage after experiencing multiple voltage surges. Therefore, the health detection system of lightning suppressors also solves the problem of reliability and lifespan of lightning protection products to a certain extent.

[0027] 3) Communication methods with advantages such as remote operation, many-to-many communication, self-organizing networking, and strong anti-interference capabilities.

[0028] The detection device of this utility model is an online testing device with data recording function. It can remotely collect, record and display the working status and various parameter information of the lightning suppressor in real time, which makes it convenient for relevant personnel to view the data and associate it with the fault-solving process. This allows designers to understand when and under what conditions the lightning suppressor malfunctions, which is convenient for subsequent research, analysis and improvement by professionals.

[0029] 4) Optimized after-sales support and reduced after-sales costs.

[0030] When equipment equipped with lightning protection products malfunctions, the detection device of this utility model can quickly eliminate or pinpoint the fault to the lightning suppressor. It is a lightning suppressor health detection device designed to address the inability of existing lightning protection products to accurately and quickly locate faults. It solves problems such as low efficiency, difficult disassembly, and poor real-time performance during troubleshooting. Moreover, it can simultaneously detect all lightning suppressors in the area through a π-type antenna network, realizing synchronous network testing of multiple measurement points for lightning protection equipment. It has advantages such as low cost, wide coverage, ease of operation, and scalability. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the principle of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model;

[0032] Figure 2 This is a circuit diagram of the MCU main control circuit in the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model;

[0033] Figure 3 This is a WiFi-Mesh network topology diagram of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model;

[0034] Figure 4 This is a circuit diagram of the BUCK step-down circuit in the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model;

[0035] Figure 5 This is a circuit diagram of the power supply lightning protection circuit in the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model;

[0036] Figure 6 This is a circuit diagram of the isolation circuit in the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model;

[0037] Figure 7 This is a circuit diagram of the health detection circuit in the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model;

[0038] Figure 8 This is a simulation result diagram when the TVS diode is functioning normally;

[0039] Figure 9 This is a simulation result diagram when the TVS diode fails and short-circuits. Detailed Implementation

[0040] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0041] Example 1

[0042] This embodiment provides a lightning suppressor health detection device based on WiFi-Mesh networking, which connects to mobile devices (mobile phones, computers, etc.). Figure 1 As shown, it includes an MCU main control circuit, which is connected to a mobile device via WiFi-Mesh networking. The MCU main control circuit is connected to a BUCK step-down circuit and an isolation circuit. The BUCK step-down circuit is connected to a power supply lightning protection circuit and a health detection circuit. The power supply lightning protection circuit and the health detection circuit are connected, and the health detection circuit is also connected to the isolation circuit.

[0043] like Figure 2 As shown, the MCU main control circuit includes the main control chip ESP32-C3, which is connected to a π-type antenna networking circuit, crystal oscillator circuit Y1, crystal oscillator circuit Y2, power supply circuit, serial port circuit, and working indicator light circuit.

[0044] Both crystal oscillator circuits Y1 and Y2 include crystals and matching capacitors; the power supply circuit includes digital power and analog power 3.3V, etc.; the serial port circuit is a SIP6 serial communication converter, used to convert the USB interface into a TTL level serial port signal for programming the MCU main control chip; the working indicator circuit includes indicator LED1 and resistor R20, used to indicate that the MCU main control circuit has been powered on.

[0045] The ESP32-C3 main control chip is a low-power, highly integrated MCU system-on-a-chip (SoC) that integrates common communication methods such as Bluetooth and WiFi. It features high RF performance, stability, versatility and reliability, as well as ultra-low power consumption, making it suitable for various application scenarios.

[0046] This embodiment represents only a preferred implementation of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model. Any lightning suppressor health detection device designed with similar technical features to this utility model will fall within the protection scope of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model.

[0047] Example 2

[0048] This embodiment provides a lightning suppressor health detection device based on WiFi-Mesh networking. Based on embodiment 1, the π-type antenna networking circuit includes an inductor L1, an antenna element ANT, and an antenna element ANT1 connected in series with the main control chip. Capacitors C7 and C8 are connected to the two ends of the inductor L1 respectively. The antenna element ANT, capacitor C7, and capacitor C8 are all connected to digital ground DGND.

[0049] Constructing a network of π-type antennas using a network circuit, such as Figure 3 The WiFi-Mesh network forms a tree-like topology. A unique root node (the node at the top of the network) is elected based on relative routing signal strength. The remaining nodes are child nodes (if node X is connected to node Y, and X has more levels to the root node than Y, then X is a child node of Y). Child devices transmit data such as the status of the corresponding TVS diode and the number of lightning strikes to the mobile terminal via the WiFi-Mesh network. The mobile terminal identifies each child device and parses the data sent by it using its physical address. Mesh networking enables mobile devices to monitor the health status of all lightning suppressors in the network by connecting to any lightning suppressor, providing technical personnel with the opportunity for further analysis and research.

[0050] This embodiment represents only a preferred implementation of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model. Any lightning suppressor health detection device designed with similar technical features to this utility model will fall within the protection scope of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model.

[0051] Example 3

[0052] This embodiment provides a lightning suppressor health detection device based on WiFi-Mesh networking, which is based on embodiments 1-2, such as... Figure 4 As shown, the BUCK step-down circuit includes step-down chip U1 and step-down chip U2, both of which are LM5164.

[0053] The VIN pin of the buck converter chip U1 is the power input for the power supply chip. The VIN pin of the buck converter chip U1 is connected to the power supply lightning protection circuit and the capacitor Cin1. The capacitor Cin1 is connected to the digital ground. The EN / UVLO pin of the buck converter chip U1 is connected to the resistor R1, which is connected in series with the capacitor Cin1. The RON pin of the buck converter chip U1 is connected to the resistor R3 and then connected to the digital ground. The GND pin of the buck converter chip U1 is connected to the digital ground. The SW pin of the buck converter chip U1 is connected to one end of the inductor Lo1 (powering the MCU). The other end of the inductor Lo1 is connected to the main control chip. The BST pin of the buck converter chip U1 is connected to the capacitor Cbst1. The capacitor Cbst1 is connected to the inductor Lo1, and the connection end of the capacitor Cbst1 and the inductor Lo1 is on the side where the inductor Lo1 is connected to the SW pin. The connection end of the inductor Lo1 and the main control chip is connected to the feedback resistor R2 and the feedback resistor R4 and then connected to the digital ground. The FB pin of the buck converter chip U1 is connected between the feedback resistor R2 and the feedback resistor R4.

[0054] The VIN pin of the buck converter chip U2 is the power input for the power supply chip. The VIN pin of the buck converter chip U2 is connected to the power supply lightning protection circuit and the capacitor Cin2. The capacitor Cin2 is grounded. The EN / UVLO pin of the buck converter chip U2 is connected to the resistor R5, which is connected in series with the capacitor Cin2. The RON pin of the buck converter chip U2 is connected to the resistor R7 and then grounded. The GND pin of the buck converter chip U2 is grounded. The SW pin of the buck converter chip U2 is connected to one end of the inductor Lo2 (powering the comparator chip TS3021). The other end of the inductor Lo2 is connected to the health detection circuit. The BST pin of the buck converter chip U2 is connected to the capacitor Cbst2. The capacitor Cbst2 is connected to the inductor Lo2, and the connection end of the capacitor Cbst2 and the inductor Lo2 is located on the side where the inductor Lo2 is connected to the SW pin. The connection end of the inductor Lo2 and the health detection circuit is connected to the feedback resistor R6 and the feedback resistor R8 in sequence and then grounded. The FB pin of the buck converter chip U2 is connected between the feedback resistor R6 and the feedback resistor R8.

[0055] The 28V input power signal is converted to 5V and 3.3V as required by the subsequent modules via two LM5164 step-down chips. The ESP32-C3 outputs 500mA with very low power consumption, and directly using the 28V input signal supplied by the product has no impact on the customer's load.

[0056] This embodiment represents only a preferred implementation of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model. Any lightning suppressor health detection device designed with similar technical features to this utility model will fall within the protection scope of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model.

[0057] Example 4

[0058] This embodiment provides a lightning suppressor health detection device based on WiFi-Mesh networking, which is based on embodiments 1-3, such as... Figure 5 As shown, this embodiment includes two power supply lightning protection circuits. The two power supply lightning protection circuits include TVS diodes D3 and D4 respectively. One end of TVS diode D3 is connected to the positive input terminal and the output terminal of the 28V power supply, and one end of TVS diode D4 is connected to the negative input terminal and the output terminal of the 28V power supply. The other ends of TVS diodes D3 and D4 are both connected to ground. The positive output terminal of the power supply is connected to the VIN pin of buck chip U1 and the VIN pin of buck chip U2 respectively through capacitors Cin1 and Cin2 of the BUCK buck circuit, thus supplying power to buck chip U1 and buck chip U2.

[0059] In the power supply lightning protection circuit, one end of the TVS diode is connected to the power signal of the product to be protected, and the other end is connected to ground. When lightning current arrives, the TVS diode clamps the voltage, ensuring that the residual voltage and current from the lightning strike are minimized, thus protecting downstream equipment from damage by lightning.

[0060] Power supply lightning protection circuit 5 is designed for indirect lightning effect protection of power signals. It consists of TVS diodes, and the reverse operating voltage of the TVS diodes can be selected according to different input voltages. Based on different lightning protection levels, the selection of components is performed by calculating parameters such as peak pulse power, breakdown voltage, and clamping voltage of the TVS diodes. This part of the circuit has the advantages of being simple, mature, stable, and highly replaceable.

[0061] This embodiment represents only a preferred implementation of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model. Any lightning suppressor health detection device designed with similar technical features to this utility model will fall within the protection scope of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model.

[0062] Example 5

[0063] This embodiment provides a lightning suppressor health detection device based on WiFi-Mesh networking, which is based on embodiments 1-4, such as Figure 6As shown, the isolation circuit includes a multi-channel isolation chip π140U. The VDD1 pin of the multi-channel isolation chip π140U is connected to the inductor Lo2 of the BUCK step-down circuit through capacitor C3. One end of capacitor C3 is connected to inductor Lo2, and the other end is grounded. The VDD2 pin of the multi-channel isolation chip π140U is connected to the inductor Lo1 of the BUCK step-down circuit through capacitor C4. One end of capacitor C4 is connected to inductor Lo1, and the other end is connected to digital ground. The GND1 pin of the multi-channel isolation chip π140U is grounded. The GND2 pin of the multi-channel isolation chip π140U is connected to digital ground. The VOA pin of the multi-channel isolation chip π140U is connected to the MTMS / IO4 pin of the main control chip. The VOB pin of the multi-channel isolation chip π140U is connected to the MTMS / IO5 pin of the main control chip.

[0064] The lightning suppressor's health detection circuit and the MCU main control circuit are connected by a Π140U isolator with ultra-low power consumption, high isolation voltage, and strong anti-interference capability. Using the isolator to transmit the sampled signal can effectively control the front-end lightning protection circuit and detection circuit from affecting the downstream ESP32 chip and peripheral circuits, achieving electrical isolation between the control end and the sampling end, improving the system's robustness, and ensuring that the lightning suppressor's detection can operate stably, reliably, and continuously.

[0065] This embodiment represents only a preferred implementation of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model. Any lightning suppressor health detection device designed with similar technical features to this utility model will fall within the protection scope of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model.

[0066] Example 6

[0067] This embodiment provides a lightning suppressor health detection device based on WiFi-Mesh networking, which is based on embodiments 1-5, such as... Figure 7As shown, the health detection circuit includes a comparator chip TS3021. The IN+ pin of the TS3021 is connected to resistors R16 and R11. Resistor R11 is connected to the negative terminal of a reverse protection diode D5. The positive terminal of the reverse protection diode D5 is connected to the inductor Lo2 and capacitor C6 of the BUCK step-down circuit. Capacitor C6 is grounded. The IN- pin of the TS3021 is connected to resistors R14 and R12. Resistor R14 is connected to resistor R13. Resistor R13 is connected to the TVS diode in the power supply lightning protection circuit. One end of the diode is connected to ground. Resistor R15 is connected between resistors R16 and R13. Resistors R16 and R15 are grounded. The VCC+ pin of comparator chip TS3021 is connected to the inductor Lo2 of the BUCK step-down circuit. The VCC- pin of comparator chip TS3021 is grounded. The OUT pin of comparator chip TS3021 is connected to resistors R17 and R19 in sequence. Resistors R17 and R19 are both connected to the VIA pin of the multi-channel isolation chip π140U. Resistor R19 is grounded.

[0068] There are two scenarios for the connections between components in the health monitoring circuit. The first scenario is that when the TVS diode is normal, the reverse protection diode D5 conducts, dividing the VCC5V voltage. The voltage divider circuit is connected in two loops: the first loop is D5→R12→R14→R15→28V ground, and the second loop is D5→R11→R16→28V ground.

[0069] The second scenario is when the TVS diode fails and short-circuits, the reverse protection diode D5 is cut off, and the 28V voltage is divided. The voltage divider circuit consists of two loops: the first is D3→R13→R14→R12→R11→R16→28V ground, and the second is D3→R13→R15→28V ground.

[0070] The power supply lightning protection circuit is connected to the health detection circuit. Each power supply lightning protection circuit corresponds to a health detection circuit. The health detection circuits are the same. Here, we take one (28V positive) as an example. The diode D3 is connected to the ground (PE) terminal and the resistor R13 in the health detection circuit as the sampling terminal of the detection circuit.

[0071] The main failure mode of lightning suppressors is component failure, specifically TVS short-circuit failure. A detection circuit needs to be configured for each TVS in each lightning suppressor. Taking one channel as an example, the health status of the lightning suppressor is converted into detecting whether current flows through the TVS. Under normal circumstances, the reverse voltage of the TVS is less than the operating voltage, and the TVS is in a high-impedance state, essentially non-conducting. When the TVS is subjected to a lightning surge or a short circuit failure, current will flow, thus affecting the magnitude of the two input voltages at the comparator input, resulting in different comparison results.

[0072] This embodiment represents only a preferred implementation of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model. Any lightning suppressor health detection device designed with similar technical features to this utility model will fall within the protection scope of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model.

[0073] The working process of the lightning suppressor health detection device based on WiFi-Mesh networking of this utility model is as follows:

[0074] 1) After the lightning suppressor health monitoring system is installed in different locations within the mesh networking area, the customer equipment starts working, which is equivalent to simultaneously powering on the health monitoring system and entering the health monitoring state;

[0075] 2) The equipment's detection system has three states: First, when the lightning suppressor is working normally, the comparator outputs a low level; second, when the equipment is struck by lightning or a surge causes the TVS diode to activate, the comparator outputs a high level; third, when the TVS diode fails and short-circuits, the comparator also outputs a high level. The method to distinguish between the latter two high-level states is to determine if there is a continuous output. Since lightning surges typically last in the microsecond range, if the high-level output of the detection circuit is transient, it indicates that the TVS diode has reversed its breakdown, thus fulfilling the normal function of the lightning protection circuit. If the detection circuit continuously outputs a high level for a long time, it indicates that the TVS diode has failed and short-circuited. In this case, the component should be replaced promptly to prevent it from failing to discharge current and provide clamping protection during the next lightning strike.

[0076] 3) The output signal of the detection circuit goes through a voltage divider resistor to an isolation chip, and then through the isolation chip to the MCU, so that the voltage meets the MCU's acquisition range of approximately 0-3.3V;

[0077] 4) After the health status of the lightning suppressor is input to the MCU, the MCU transmits the collected information to the mobile device through the WiFi-Mesh networking system. The health status of the lightning suppressor, such as the working status of the TVS and the number of lightning strikes, can be read using a dedicated APP device.

[0078] The key judgment mechanism of the lightning suppressor health detection device based on WiFi-Mesh networking in this utility model is as follows:

[0079] The health monitoring circuit uses STMicroelectronics' TS3021 comparator combination circuit to determine whether the TVS diode has failed due to a short circuit. Figure 8 As shown, when the TVS is in normal operation, its resistance can reach the megaohm level. At this time, the voltage at comparator A is higher than the voltage at comparator B, and the comparator chip TS3021 outputs a low level. Figure 9As shown, when the TVS fails and short-circuits, the voltage at comparator A is lower than the voltage at comparator B, and the comparator chip TS3021 outputs a high level.

Claims

1. A lightning suppressor health detection device based on WiFi-Mesh networking, connected with a mobile device, characterized in that, The application relates to a mobile device with a MCU master control circuit, a BUCK voltage reduction circuit and an isolation circuit.

2. The lightning suppressor health detection apparatus based on WiFi-Mesh networking according to claim 1, wherein, The MCU master control circuit comprises a master control chip connected with a pi type antenna networking circuit, a crystal oscillator Y1, a crystal oscillator Y2, a power supply circuit, a serial port circuit and a working indicator lamp circuit.

3. The lightning suppressor health detection apparatus based on WiFi-Mesh networking according to claim 2, wherein, The pi type antenna networking circuit comprises an inductor L1, an antenna element ANT and an antenna element ANT1 connected in series with the master control chip.

4. The lightning suppressor health detection apparatus based on WiFi-Mesh networking according to claim 2, wherein, The master control chip is of an ESP32-C3 type.

5. The lightning suppressor health detection apparatus based on WiFi-Mesh networking according to claim 3, wherein, The BUCK voltage reduction circuit comprises voltage reduction chips U1 and U2, both of which are LM5164. The VIN pin of the voltage reduction chip U1 is connected with a power lightning protection circuit and a capacitor Cin1, the capacitor Cin1 is connected with a digital ground, the EN / UVLO pin of the voltage reduction chip U1 is connected with a resistor R1, the resistor R1 is connected with the capacitor Cin1 in series, the RON pin of the voltage reduction chip U1 is connected with a resistor R3 and then connected with a digital ground, the GND pin of the voltage reduction chip U1 is connected with a digital ground, the SW pin of the voltage reduction chip U1 is connected with one end of an inductor Lo1, the other end of the inductor Lo1 is connected with the master control chip, the BST pin of the voltage reduction chip U1 is connected with a capacitor Cbst1, the capacitor Cbst1 is connected with the inductor Lo1, and the connection end of the capacitor Cbst1 and the inductor Lo1 is located on the side of the inductor Lo1 connected with the SW pin, the connection end of the inductor Lo1 and the master control chip is connected with a feedback resistor R2 and a feedback resistor R4 in series and then connected with a digital ground, and the FB pin of the voltage reduction chip U1 is connected between the feedback resistor R2 and the feedback resistor R4. The VIN pin of the voltage reduction chip U2 is connected with a power lightning protection circuit and a capacitor Cin2, the capacitor Cin2 is grounded, the EN / UVLO pin of the voltage reduction chip U2 is connected with a resistor R5, the resistor R5 is connected with the capacitor Cin2 in series, the RON pin of the voltage reduction chip U2 is connected with a resistor R7 and then grounded, the GND pin of the voltage reduction chip U2 is grounded, the SW pin of the voltage reduction chip U2 is connected with one end of an inductor Lo2 in sequence, the other end of the inductor Lo2 is connected with a health detection circuit, the BST pin of the voltage reduction chip U2 is connected with a capacitor Cbst2, the capacitor Cbst2 is connected with the inductor Lo2, and the connection end of the capacitor Cbst2 and the inductor Lo2 is located on the side of the inductor Lo2 connected with the SW pin, the connection end of the inductor Lo2 and the health detection circuit is connected with a feedback resistor R6 and a feedback resistor R8 in sequence and then grounded, and the FB pin of the voltage reduction chip U2 is connected between the feedback resistor R6 and the feedback resistor R8.

6. The WiFi-Mesh networking based lightning suppressor health detection apparatus of claim 5, wherein, The power lightning protection circuit comprises a TVS diode, one end of the TVS diode is provided with a power positive input end and a power positive output end, the other end is connected with the ground, and the power positive output end is connected with the VIN pin of the voltage reduction chip U1 and the VIN pin of the voltage reduction chip U2 through the capacitor Cin1 and the capacitor Cin2 of the BUCK voltage reduction circuit.

7. The WiFi-Mesh networking based lightning suppressor health detection apparatus of claim 6, wherein, The isolation circuit comprises a multi-channel isolation chip π140U, the VDD1 pin of the multi-channel isolation chip π140U is connected with the inductor Lo2 of the BUCK voltage reduction circuit through a capacitor C3, one end of the capacitor C3 is connected with the inductor Lo2, and the other end is grounded, the VDD2 pin of the multi-channel isolation chip π140U is connected with the inductor Lo1 of the BUCK voltage reduction circuit through a capacitor C4, one end of the capacitor C4 is connected with the inductor Lo1, and the other end is connected with a digital ground, the GND1 pin of the multi-channel isolation chip π140U is grounded, the GND2 pin of the multi-channel isolation chip π140U is connected with a digital ground, the VOA pin of the multi-channel isolation chip π140U is connected with the MTMS / IO4 pin of the master control chip, and the VOB pin of the multi-channel isolation chip π140U is connected with the MTMS / IO5 pin of the master control chip.

8. The WiFi-Mesh networking based lightning suppressor health detection apparatus of claim 7, wherein, The health detection circuit comprises a comparator chip TS3021, an IN+ pin of the comparator chip TS3021 is connected with a resistor R16 and a resistor R11, the resistor R11 is connected with a negative electrode of an anti-reverse diode D5, a positive electrode of the anti-reverse diode D5 is connected with an inductor Lo2 and a capacitor C6 of a BUCK voltage reduction circuit, the capacitor C6 is grounded, an IN- pin of the comparator chip TS3021 is connected with a resistor R14 and a resistor R12, the resistor R14 is connected with a resistor R13, the resistor R13 is connected with one end of a TVS diode of a power lightning protection circuit, a resistor R15 is connected between the resistor R16 and the resistor R13, the resistor R16 and the resistor R15 are grounded, a VCC+ pin of the comparator chip TS3021 is connected with the inductor Lo2 of the BUCK voltage reduction circuit, a VCC- pin of the comparator chip TS3021 is grounded, and an OUT pin of the comparator chip TS3021 is sequentially connected with a resistor R17 and a resistor R19, the resistor R17 and the resistor R19 are connected with a VIA pin of a multi-channel isolation chip π140U, and the resistor R19 is grounded.

9. The WiFi-Mesh networking based lightning suppressor health detection apparatus of claim 8, wherein, The power lightning protection circuit and the health detection circuit are equal in number and are connected one by one.

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