Railway signal machine room grounding safety monitoring system

Abstract

The utility model discloses a railway signal machine room grounding safety monitoring system, which is characterized in that an end forming monitoring unit, a lightning protection monitoring unit, an electrical integrity monitoring unit and a grounding resistance monitoring unit are respectively and electrically connected with a processing unit, and the processing unit is electrically connected with a communication unit; the lightning protection monitoring unit comprises an MCU, a voltage signal acquisition module, a current signal acquisition module, a signal conditioning module, a temperature acquisition module and a communication module. The voltage signal acquisition module and the current signal acquisition module are electrically connected with the MCU through the signal conditioning module, the temperature acquisition module is electrically connected with the MCU, and the communication module is in communication connection with the MCU. The beneficial effects of the utility model are that various on-line monitoring such as end forming monitoring, lightning protection monitoring, electrical integrity monitoring, grounding resistance monitoring and the like are realized, data of the lightning protection unit are recorded through lightning protection monitoring, and an alarm is rapidly given when the lightning protection unit is detected to be damaged and fail; through grounding resistance monitoring and electrical integrity monitoring, overall contact and connection condition monitoring of the grounding grid is realized, and lightning protection continuity is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of grounding and lightning protection for railway signal rooms, in particular to a grounding safety monitoring system for railway signal rooms. Background Art

[0002] With the rapid development of my country's railways, railway routes are becoming increasingly widespread and busier, leading to an increasing number of railway signal rooms. Railway signal rooms are crucial structures for installing and maintaining railway signaling equipment. They are crucial for organizing railway transportation and directing train operations, and their operational reliability is crucial for ensuring the normal, safe, and stable operation of the entire railway line.

[0003] Railway signaling equipment within railway signal rooms is becoming increasingly integrated and intelligent, ensuring safe railway operations. However, this equipment is also becoming more sensitive to external conditions and more susceptible to factors such as lightning surges and static electricity, leading to malfunctions and even damage.

[0004] To ensure normal railway transportation, signal equipment rooms are equipped with comprehensive lightning protection and grounding systems. Monitoring the operational quality of the grounding system and the status of surge protectors (SPDs) is particularly important. However, existing integrated grounding monitoring systems in railway signal rooms cannot capture sufficient grounding and lightning protection data and related information. Existing integrated lightning protection and grounding systems generally suffer from limited monitoring targets, low monitoring accuracy, and poor system stability, making them incapable of achieving accurate and reliable grounding safety monitoring. Utility Model Content

[0005] In response to the shortcomings of the existing technology, the utility model provides a railway signal room grounding safety monitoring system, which aims to solve the technical problems of the existing comprehensive monitoring and grounding systems in the railway power field, such as single monitoring objects, low monitoring accuracy and poor system stability.

[0006] To achieve the above-mentioned object, the present invention is implemented through the following technical solution: a railway signal room grounding safety monitoring system, characterized by comprising a terminal monitoring unit, a lightning protection monitoring unit, a processing unit, an electrical integrity monitoring unit, a grounding resistance monitoring unit, a communication unit, and a power supply unit, wherein the terminal monitoring unit, the lightning protection monitoring unit, the electrical integrity monitoring unit, and the grounding resistance monitoring unit are electrically connected to the processing unit, respectively, and the processing unit is electrically connected to the communication unit;

[0007] The power supply unit is respectively connected to the terminal monitoring unit, the lightning protection monitoring unit, the ground resistance monitoring unit, the electrical integrity monitoring unit, the communication unit, and the processing unit to supply power;

[0008] The lightning protection monitoring unit includes an MCU, a voltage signal acquisition module, a current signal acquisition module, a temperature acquisition module, a life display module, and a communication module; the voltage signal acquisition module, the current signal acquisition module, the temperature acquisition module, the life display module, and the communication module are communicatively connected to the MCU.

[0009] Preferably, the voltage signal acquisition module includes a voltage transformer circuit, an amplifier circuit, and a voltage frequency acquisition circuit, and the amplifier circuit and the voltage frequency acquisition circuit are both connected to the voltage transformer circuit.

[0010] Preferably, the voltage transformer circuit includes a voltage transformer for collecting and converting voltage signals;

[0011] The two input terminals of the voltage transformer are respectively connected in series with resistors.

[0012] Preferably, the amplifying circuit includes an amplifier AD620 to amplify the collected voltage signal;

[0013] A potentiometer W1 is connected in series to the external pins 1 and 8 of the amplifier AD620 to adjust the gain. Pins 2 and 3 of the amplifier AD620 are the positive and negative signal input terminals of the amplifier AD620. Pins 4 and 7 of the amplifier AD620 are connected to the positive and negative poles of the power supply respectively. Pin 5 of the amplifier AD620 is the reference voltage input pin. The output zero point is adjusted by potentiometer W2 to meet the input requirements of the processor A / D interface. Pin 6 of the amplifier AD620 is the output terminal of the amplified signal.

[0014] Preferably, the voltage frequency acquisition circuit includes a comparator, which converts the sinusoidal voltage signal into a square wave signal with the same frequency for frequency detection;

[0015] The current at the output of the voltage transformer is converted by a resistor and fed into the comparator. Pin 1 of the comparator is the output of the converted waveform, while pins 2 and 3 are the positive and negative signal inputs. Pin 4 of the comparator is grounded, and pin 8 of the comparator is connected to the positive terminal of the power supply.

[0016] Preferably, the current signal acquisition module includes a sampling resistor, a protection denoising circuit, and an amplification circuit connected in sequence, a sampling resistor is connected in series with the ground lead below the surge protector, the voltage across the sampling resistor is used as the sampling signal, and the leakage current value is obtained by measuring the voltage on the resistor; the leakage current value is obtained by protection denoising and amplification to obtain a current signal.

[0017] Preferably, the amplifying circuit comprises an AD825 amplifier type, which amplifies the leakage current value;

[0018] Pins 1 and 8 of the amplifier are the signal input terminals connected to the protection de-noising circuit, pin 2 of the amplifier outputs the amplified signal, pins 3 and 6 of the amplifier are connected to the positive and negative poles of the power supply respectively, pins 4 and 5 of the amplifier are connected to the data bus to adjust the amplifier's amplification factor; pin 7 of the amplifier is grounded.

[0019] Preferably, the protection and noise reduction circuit includes resistors R12 and R13 and capacitors C9, C10 and C11 connected in parallel, and the capacitors C9 and C11 are grounded to protect the circuit and remove some high-frequency noise;

[0020] Preferably, the temperature acquisition module includes a temperature measurement main control chip and a plurality of temperature sensors, the temperature measurement main control chip adopts an MSP430F247 processor chip, and the temperature sensor adopts a TMP275 temperature sensor;

[0021] The real-time temperature measured is transmitted to the temperature measurement main control chip through temperature sensors placed inside and outside the surge protector.

[0022] Preferably, the MCU adopts an STM32F407ZGT6 chip, and the communication unit includes a wireless communication circuit and / or a wired communication circuit.

[0023] Preferably, the life display circuit includes a light emitting diode and a resistor.

[0024] Beneficial effects of the utility model:

[0025] 1) It realizes multiple online monitoring functions such as terminal monitoring, lightning protection monitoring, electrical integrity monitoring, and ground resistance monitoring, which improves detection accuracy and realizes remote monitoring, early warning, and information management functions;

[0026] (2) Provide the collected data to the processing unit to monitor the operating status in real time, record the lightning protection unit (SPD) data through the lightning protection monitoring unit, and quickly alarm and perform timely maintenance when the lightning protection unit (SPD) is detected to be damaged or failed;

[0027] (3) Through ground resistance monitoring and electrical integrity monitoring, the overall contact and connection status of the grounding network can be monitored to ensure the continuity of lightning protection, ensure the safety and reliability of railway signal rooms, and thus provide protection for railway transportation safety;

[0028] (4) It solves the common technical problems of the existing integrated lightning protection and grounding systems in the railway power field, such as single monitoring objects, low monitoring accuracy, and poor system stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1This is an overall structural diagram of a railway signal room grounding safety monitoring system according to an embodiment of the present invention;

[0030] Figure 2 This is a structural block diagram of a railway signal room grounding safety monitoring system according to an embodiment of the present invention;

[0031] Figure 3 This is a structural block diagram of a lightning protection monitoring unit of a railway signal room grounding safety monitoring system according to an embodiment of the present invention;

[0032] Figure 4 The invention embodiment relates to a circuit diagram of the MUC of a lightning protection monitoring unit of a railway signal room grounding safety monitoring system;

[0033] Figure 5 This is a circuit diagram of a voltage signal acquisition module of a lightning protection monitoring unit of a railway signal room grounding safety monitoring system according to an embodiment of the present invention;

[0034] Figure 6 The embodiment of the present invention relates to a circuit diagram of a current signal acquisition module of a lightning protection monitoring unit of a grounding safety monitoring system of a railway signal room.

[0035] Figure 7 The embodiment of the present invention relates to a circuit diagram of a temperature acquisition module of a lightning protection monitoring unit of a grounding safety monitoring system in a railway signal room.

[0036] Figure 8 The embodiment of the present invention relates to a circuit diagram of a wired communication circuit of a communication module of a lightning protection monitoring unit of a grounding safety monitoring system of a railway signal room.

[0037] Figure: 1. Terminal monitoring unit, 2. Lightning protection monitoring unit, 3. Processing unit, 4. Electrical integrity monitoring unit, 5. Ground resistance monitoring unit, 6. Power supply unit, 7. Communication unit DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0039] The railway signal room grounding safety monitoring system is characterized in that it comprises a terminal monitoring unit, a lightning protection monitoring unit, a processing unit, an electrical integrity monitoring unit, a grounding resistance monitoring unit, a communication unit and a power supply unit, wherein the terminal monitoring unit, the lightning protection monitoring unit, the electrical integrity monitoring unit and the grounding resistance monitoring unit are electrically connected with the processing unit, and the processing unit is electrically connected with the communication unit;

[0040] The power supply unit is connected with the terminal monitoring unit, the lightning protection monitoring unit, the grounding resistance monitoring unit, the electrical integrity monitoring unit, the communication unit and the processing unit for power supply.

[0041] The terminal monitoring, lightning protection monitoring, electrical integrity monitoring and grounding resistance monitoring are realized, the detection precision is improved, the remote monitoring and early warning and information management functions are realized, the collected data are provided to the processing unit, and the running state is monitored in real time.

[0042] The lightning protection monitoring unit comprises an MCU, a voltage signal acquisition module, a current signal acquisition module, a temperature acquisition module, a service life display module and a communication module, and the voltage signal acquisition module, the current signal acquisition module, the temperature acquisition module, the service life display module and the communication module are in communication connection with the MCU.

[0043] The lightning protection unit data are recorded by the lightning protection monitoring unit, and the service life display module is used for rapid alarm when the lightning protection unit (SPD) is detected to be damaged and failed, so that timely maintenance is realized.

[0044] The MCU adopts an STM32F407ZGT6 chip. The chip has the characteristics of small size, low power consumption and strong computing performance, and meets the requirements of data processing. The chip has a maximum frequency of 168MHz, 1MB of FLASH program memory, 192kB of SRAM, a static memory controller with 4 chip selects, and supports CF cards, SRAM, PSRAM, NOR / NAND memories and the like. The chip also has rich peripheral resources. It has up to 3 I2C interfaces, 4 USART interfaces, 4 UART interfaces, 3 SPI interfaces, 2 I2S interfaces with multiplexed full-duplex mode, 2 CAN interfaces and an SDIO interface. Various peripheral interfaces facilitate communication between the MCU and external modules.

[0045] The STM32F407ZGT6 chip is integrated with a 12-bit successive approximation type analog-to-digital converter (ADC). The lightning protection monitoring unit needs to synchronously acquire voltage and current signals. According to the sampling theorem, 256 points are sampled in each cycle, i.e. the conversion rate needs to be greater than 12.8kHZ, and the built-in ADC of the chip is used for conversion. The PA5 and PF5 pins of the MCU are used as two ADC channels.

[0046] MCU connects clock circuit, low-speed external clock in clock circuit connects the frequency of 32.768 kHz crystal oscillator as the clock source of RTC, and high-speed external clock connects the frequency of 8 MHz crystal oscillator directly as system clock.

[0047] The voltage signal acquisition module comprises a voltage transformer circuit, an amplification circuit and a voltage frequency acquisition circuit, and the amplification circuit and the voltage frequency acquisition circuit are connected with the voltage transformer circuit.

[0048] The voltage transformer circuit comprises a voltage transformer, and the voltage signal is collected and converted by the voltage transformer; the voltage transformer adopts an SPT204A.

[0049] The two input ends of the voltage transformer are connected in series with resistors.

[0050] Specifically, the voltage signal is converted into a current signal through two series resistors R2 and R3 with a resistance of 47kΩ, and then input into the voltage transformer; a small voltage-dependent resistor VR1 is arranged in front of the series resistor to prevent overvoltage influence. One way of current at the output end of the transformer is converted back into a voltage signal through a resistor R4, and the converted voltage value is-0.54~+0.54V.

[0051] The amplification circuit comprises an amplifier AD620, and the collected voltage signal is amplified by the amplifier AD620; the amplifier AD620 has eight pins. A potentiometer W1 is connected in series in the external pins 1 and 8 of the amplifier AD620 to adjust the gain, the pins 2 and 3 of the amplifier AD620 are the positive and negative signal input ends of the amplifier AD620, the pins 4 and 7 of the amplifier AD620 are connected with the positive and negative electrodes of the power supply respectively, the pin 5 of the amplifier AD620 is a reference voltage input pin, and the output zero point is adjusted through the potentiometer W2 to meet the input requirements of the A / D interface of the processor; the pin 6 of the amplifier AD620 is the signal output end after amplification. The diode D1 and Z1 in the circuit play a role in protecting the amplifier, and the capacitors C3-C7 play a role in decoupling and filtering.

[0052] The voltage frequency acquisition circuit comprises a comparator, and the sine voltage signal is converted into a square wave signal with the same frequency for frequency detection; the wave conversion adopts the comparator.

[0053] The other way of current at the output end of the voltage transformer SPT204A is converted by the resistor R10 and then sent to the comparator LM393. The pin 1 of the comparator LM393 is the output end after wave conversion and is output to the MCU; the pins 2 and 3 of the comparator are the positive and negative signal input ends; the pin 4 of the comparator is grounded; and the pin 8 of the comparator is connected with the positive electrode of the power supply.

[0054] The current signal measurement adopts a precise small resistance shunt method. The current signal acquisition module includes a protection denoising circuit and an amplification circuit connected in sequence, a sampling resistor is connected in series with a grounding lead below a surge protector, a voltage across the sampling resistor is taken as a sampling signal, a leakage current value is obtained by measuring the voltage on the sampling resistor, and the leakage current value is taken to obtain a current signal through protection denoising and amplification.

[0055] The amplification circuit includes an AD825 amplifier type, and amplifies the leakage current value.

[0056] Pin 1 and pin 8 of the amplifier are connected to the protection denoising circuit as signal input ends; pin 2 of the amplifier outputs an amplified signal, resistor R16 and capacitor C12 play a role in eliminating high-frequency noise, and voltage clamping diode Z2 plays a role in clamping voltage and protecting the MCU; pin 3 and pin 6 of the amplifier are respectively connected to the positive and negative electrodes of the power supply, pin 4 and pin 5 of the amplifier are connected to the data bus to adjust the amplification multiple of the amplifier; and pin 7 of the amplifier is grounded.

[0057] The protection denoising circuit includes resistors R12 and R13 and capacitors C9, C10 and C11 connected in parallel, capacitors C9 and C11 are grounded, and play a role in protecting the circuit and removing part of the high-frequency noise.

[0058] The temperature acquisition module includes a temperature measurement master control chip, the temperature measurement master control chip adopts an MSP430F247 processor chip, a built-in I2C bus facilitates communication connection between the temperature measurement master control chip and external devices, and is connected to WiFi communication through a USART protocol to transmit temperature data to an MCU.

[0059] The temperature sensor measurement adopts a TM275 temperature sensor, which has a built-in digital-to-analog converter, and can directly output a digital signal to the MCU for processing after temperature measurement. The working current of the temperature sensor is 50μA, 2-4 TMP275 temperature sensors are selected, and are respectively arranged in the gap between the pressure-sensitive resistor and the shell and outside the surge protector.

[0060] The temperature acquisition module transmits the measured real-time temperature inside and outside the surge protector to the temperature measurement master control chip, the temperature sensor transmits signals to the temperature measurement master control chip through an I2C bus, the built-in I2C bus of the temperature measurement master control chip is connected to external devices, and is connected to WiFi communication through a USART protocol to transmit temperature data to the MCU.

[0061] The temperature sensor transmits the measured real-time temperature inside and outside the surge protector to the temperature measurement master control chip.

[0062] The communication unit includes a wireless communication circuit and / or a wired communication circuit.

[0063] The wired communication circuit adopts RS485, which has the characteristics of low interface level, high transmission rate, strong anti-interference ability, long transmission distance, etc. In this application, the RS485 interface chip adopts ADM2587E, which integrates photoelectric isolation technology and DC / DC power supply, thereby enhancing the reliability of the circuit and ensuring the stable transmission of the collected voltage and current signals.

[0064] The wireless communication adopts a WiFi communication module. The temperature measurement module transmits the processed temperature data to the MCU through the serial port by the WiFi communication module, and the processed leakage current and temperature data of the MCU are also transmitted to the processing unit by the WiFi communication module. The processing unit monitors the leakage current flowing through the surge protector and the temperature inside the surge protector in real time. The WiFi communication module adopts USR-WIFI232-S, supports IEEE 802.11b / g, and has a transmission speed of 54Mbp. The MCU transmits data to the WiFi module through the serial port to realize wireless communication.

[0065] The life display circuit includes a light-emitting diode and a resistor. When the leakage current value exceeds 20 μA, the resistive leakage current value exceeds 5 μA, or the temperature value exceeds 65℃, an alarm is issued. The failed SPD or SPD subjected to lightning strike is displayed for alarm. This reminds the staff to check and maintain in time, so as to ensure the safe and stable operation of the equipment.

[0066] The lightning protection monitoring unit also includes a power module that provides power for the entire lightning protection monitoring unit. An AC / DC module power supply is used to convert 220V AC voltage to 5V DC voltage, which can provide power for clock chips, voltage and current collection circuits, etc. Then, through the power stabilizing chip, the input voltage is reduced to 3.3V, which provides power for the devices with a working voltage of 3.3V, such as MCU and WiFi communication module.

[0067] The lightning protection monitoring unit monitors the running surge protector and collects leakage current and temperature in real time to understand its running state. When the leakage current value exceeds 20 μA, the resistive leakage current value exceeds

[0068] 5 μA, or the temperature value exceeds 65℃, an alarm is issued to remind the staff to check and maintain in time, so as to ensure the safe and stable operation of the equipment.

[0069] Compared with the prior art, end monitoring, lightning protection monitoring, electrical integrity monitoring, grounding resistance monitoring and other various online monitoring are realized, the detection precision is improved, remote monitoring and early warning, information management functions are realized, the collected data are provided to a processing unit, the running condition is monitored in real time, lightning protection unit data are recorded through lightning protection monitoring, when lightning protection unit damage and failure are detected, rapid alarm is realized, timely maintenance is realized, through grounding resistance monitoring and electrical integrity monitoring, the overall contact and connection condition of the grounding grid is monitored, the continuity of lightning protection is ensured, the safety and reliability of the railway signal room are ensured, and then the railway transportation safety is ensured, the technical problems that the monitoring object is single, the monitoring precision is not high, and the system stability is poor in the existing comprehensive lightning protection and grounding system in the field of railway power are solved.

[0070] In the utility model, unless another definite provision and limitation, the terms "installation", "arrangement", "connection", "fixation", "screw connection" and other terms should be understood broadly, for example, can be fixed connection, also can be detachable connection, or be integrated, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirect connection through intermediate medium, can be the communication of two elements or the interaction of two elements, unless another definite limitation, for the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0071] Although the embodiments of the utility model have been shown and described, for the ordinary skilled in the art, it can be understood that the embodiments can be changed, modified, replaced and changed in many ways without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and its equivalents.

Claims

1. Railway signal room grounding safety monitoring system, characterized by The device comprises a terminal monitoring unit, a lightning protection monitoring unit, a processing unit, an electrical integrity monitoring unit, a ground resistance monitoring unit, a power supply unit, and a communication unit, wherein the terminal monitoring unit, the lightning protection monitoring unit, the electrical integrity monitoring unit, and the ground resistance monitoring unit are electrically connected to the processing unit respectively, and the processing unit is electrically connected to the communication unit; The power supply unit is respectively connected to the terminal monitoring unit, the lightning protection monitoring unit, the ground resistance monitoring unit, the electrical integrity monitoring unit, the communication unit, and the processing unit to supply power; The lightning protection monitoring unit includes an MCU, a voltage signal acquisition module, a current signal acquisition module, a temperature acquisition module, a life display module, and a communication module; the voltage signal acquisition module, the current signal acquisition module, the temperature acquisition module, the life display module, and the communication module are communicatively connected to the MCU.

2. The railway signal room grounding safety monitoring system according to claim 1 is characterized by: The voltage signal acquisition module includes a voltage transformer circuit, an amplifier circuit, and a voltage frequency acquisition circuit. The amplifier circuit and the voltage frequency acquisition circuit are both connected to the voltage transformer circuit.

3. The railway signal room grounding safety monitoring system according to claim 2 is characterized in that: The voltage transformer circuit includes a voltage transformer, which collects and converts the voltage signal; The two input terminals of the voltage transformer are respectively connected in series with resistors.

4. The railway signal room grounding safety monitoring system according to claim 3 is characterized by: The amplifying circuit includes an amplifier AD620, which amplifies the collected voltage signal; A potentiometer W1 is connected in series to the external pins 1 and 8 of the amplifier AD620 to adjust the gain. Pins 2 and 3 of the amplifier AD620 are the positive and negative signal input terminals of the amplifier AD620. Pins 4 and 7 of the amplifier AD620 are connected to the positive and negative poles of the power supply respectively. Pin 5 of the amplifier AD620 is the reference voltage input pin. The output zero point is adjusted by potentiometer W2 to meet the input requirements of the processor A / D interface. Pin 6 of the amplifier AD620 is the output terminal of the amplified signal.

5. The railway signal room grounding safety monitoring system according to claim 4 is characterized in that: The voltage frequency acquisition circuit includes a comparator that converts the sinusoidal voltage signal into a square wave signal with the same frequency for frequency detection; A current at the output end of the voltage transformer is converted by a resistor and sent to the comparator. Pin 1 of the comparator is the output end after waveform conversion, and pins 2 and 3 of the comparator are positive and negative signal input ends; pin 4 of the comparator is grounded; and pin 8 of the comparator is connected to the positive pole of the power supply.

6. The railway signal room grounding safety monitoring system according to claim 1 or 2, characterized in that: The current signal acquisition module includes a protection de-noising circuit and an amplification circuit connected in sequence. A sampling resistor is connected in series with the ground lead below the surge protector. The voltage across the sampling resistor is used as a sampling signal. The leakage current value is obtained by measuring the voltage across the resistor. The leakage current value is taken and de-noised by protection and amplified to obtain a current signal.

7. The railway signal room grounding safety monitoring system according to claim 6, characterized in that: The amplifier circuit includes an AD825 amplifier type, which amplifies the leakage current value; Pins 1 and 8 of the amplifier are the signal input terminals connected to the protection de-noising circuit, pin 2 of the amplifier outputs the amplified signal, pins 3 and 6 of the amplifier are connected to the positive and negative poles of the power supply respectively, pins 4 and 5 of the amplifier are connected to the data bus to adjust the amplifier's amplification factor; pin 7 of the amplifier is grounded.

8. The railway signal room grounding safety monitoring system according to claim 6 or 7, characterized in that: The protection and noise reduction circuit includes resistors R12 and R13 and capacitors C9, C10 and C11 connected in parallel. The capacitors C9 and C11 are grounded to protect the circuit and remove some high-frequency noise.

9. The railway signal room grounding safety monitoring system according to claim 1 or 2, characterized in that: The temperature acquisition module includes a temperature measurement main control chip, and the temperature measurement main control chip adopts an MSP430F247 processor chip; The real-time temperature measured is transmitted to the temperature measurement main control chip through temperature sensors placed inside and outside the surge protector.

10. The railway signal room grounding safety monitoring system according to claim 6, characterized in that: The MCU adopts an STM32F407ZGT6 chip, and the communication unit includes a wireless communication circuit and / or a wired communication circuit.

Images