Monitoring system and method for safety of induced polarization high-voltage emission

Abstract

The invention discloses a monitoring system and method for induced polarization high-voltage emission safety, and relates to the technical field of geophysical exploration instruments, and the system comprises a data collection module, a DC relay, a control module and a monitoring end. The data acquisition module, the direct-current relay and the monitoring end are all connected with the control module; the data acquisition module is used for calculating grounding resistance in an induced polarization transmitting loop of a target induced polarization transmitter in real time and sending the grounding resistance calculated in real time to the control module; the control module is used for sending the grounding resistance received in real time to a monitoring end, and when the grounding resistance is larger than a set resistance threshold value, the control module controls the direct-current relay to disconnect the direct-current bus voltage of the target induced polarization transmitter and sends open-circuit fault information to the monitoring end through wireless communication. According to the invention, real-time safety monitoring of the highly induced polarization transmitter is realized, and the production safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of geophysical exploration instruments, in particular to a monitoring system and method for safety of high-voltage excitation of induced polarization. BACKGROUND

[0002] In search of metal sulfide minerals, the induced polarization method (referred to as IP method) is irreplaceable. At present, the exploration of mineral products with a burial depth greater than 300 meters needs to use a 60-kilowatt-180-kilowatt IP transmitter, and the maximum transmission voltage can reach 3000V. A 10-kilometer-20-kilometer power supply line needs to be laid, and if there is a joint every 100 meters, there are about 200 joints, and the joints are prone to leakage, affecting the quality of data acquisition. The power supply line often passes through mountainous areas, forest areas, pastoral areas, and other areas, and cattle, horses, sheep, and rabbits may bite the power supply line. In the development of high-power IP work, high-voltage and high-current transmission pose a great safety hazard to personnel and livestock. The relationship between the mine and the community residents is generally tense, and the safety production requirements of the mine are high. In the Environmental, Social and Governance (ESG) rating of the mine environment, society, and company governance, the evaluation requirements in the safety field are extremely strict, and safety production is the bottom line and the cornerstone of the development of the mine. If personnel and livestock are electrocuted, it will affect the safety of people's property. The conventional constant-voltage and constant-current IP transmitter does not have a leakage and short-circuit protection system, does not have real-time safety monitoring, and cannot guarantee the safety of personnel. SUMMARY

[0003] The purpose of the present application is to provide a monitoring system and method for safety of high-voltage excitation of induced polarization, which realizes real-time safety monitoring of high-voltage IP transmission and improves production safety.

[0004] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0005] In a first aspect, the present application provides a monitoring system for safety of high-voltage excitation of induced polarization, comprising: a data acquisition module, a direct-current relay, a control module, and a monitoring end; the data acquisition module, the direct-current relay, and the monitoring end are all connected with the control module;

[0006] The data acquisition module is used for real-time calculation of the grounding resistance in the IP transmission loop of a target IP transmitter, and sends the real-time calculated grounding resistance to the control module;

[0007] The control module is used for sending the real-time received grounding resistance to the monitoring end, and when the grounding resistance is greater than a set resistance threshold, it disconnects the direct-current bus voltage of the target IP transmitter through the control of the direct-current relay and sends an open-circuit fault information to the monitoring end through wireless communication.

[0008] Optionally, the data acquisition module includes an isolated current and voltage sampling unit, and a ground resistance calculation unit;

[0009] The isolated current and voltage sampling unit is used to collect the transmission voltage and loop current of the transmission loop of the target IP transmitter;

[0010] The ground resistance calculation unit is used to calculate the ground resistance according to the transmission voltage and loop current collected by the isolation current and voltage sampling unit.

[0011] Optionally, the data acquisition module also includes a synchronous acquisition unit, which is used to synchronously acquire the input voltage, input current, output voltage and output current of the DC relay according to a set sampling frequency, and send the input voltage, input current, output voltage and output current to the control module in real time.

[0012] Optionally, the control module is further configured to:

[0013] When the fluctuation of the grounding resistance is greater than a set fluctuation value, leakage fault information is sent to the monitoring terminal via wireless communication;

[0014] When the input voltage is greater than a first set safety voltage threshold, sending input overvoltage information to the monitoring end via wireless communication;

[0015] When the input current is greater than a first set current threshold, sending input overcurrent information to the monitoring end via wireless communication;

[0016] When the output voltage is greater than a second set safety voltage threshold, output overvoltage information is sent to the monitoring end via wireless communication;

[0017] When the input current is greater than the second set current threshold, output overcurrent information is sent to the monitoring end via wireless communication.

[0018] Optionally, the data acquisition module includes a 24-bit analog-to-digital conversion unit, and the 24-bit analog-to-digital conversion unit is used to convert the analog signals of the input voltage, the input current, the output voltage and the output current collected by the synchronous acquisition unit into digital signals.

[0019] Optionally, the monitoring end is used to input the set resistance threshold, and the monitoring end is also used to send a disconnection instruction to the control module, and the control module is used to control the DC relay to disconnect the DC bus voltage of the target IP transmitter after receiving the disconnection instruction.

[0020] Optionally, the monitoring terminal includes a tablet computer and an LCD liquid crystal display screen, and both the tablet computer and the LCD liquid crystal display screen are used to display the grounding resistance.

[0021] Optionally, the target electrostatic transmitter is a constant voltage transmitter or a constant current transmitter.

[0022] Optionally, the control module adopts FPGA.

[0023] In a second aspect, the present application provides a method for monitoring the safety of induced polarization high-voltage emission. The method for monitoring the safety of induced polarization high-voltage emission uses the monitoring system for induced polarization high-voltage emission. The method for monitoring the safety of induced polarization high-voltage emission includes:

[0024] The data acquisition module calculates the ground resistance in the IP transmission loop of the target IP transmitter in real time, and sends the calculated ground resistance to the control module;

[0025] The control module sends the real-time grounding resistance received to the monitoring end, and when the grounding resistance is greater than the set resistance threshold, it controls the DC relay to disconnect the DC bus voltage of the target IP transmitter and sends open circuit fault information to the monitoring end via wireless communication.

[0026] According to the specific embodiments provided in this application, this application discloses the following technical effects:

[0027] The present application provides a monitoring system and method for the safety of induced polarization high-voltage transmission. The data acquisition module calculates the grounding resistance in the induced polarization transmission circuit of the target induced polarization transmitter in real time, and sends the real-time calculated grounding resistance to the control module; the control module sends the real-time received grounding resistance to the monitoring end, and when the grounding resistance is greater than the set resistance threshold, it controls the DC relay to disconnect the DC bus voltage of the target induced polarization transmitter, and sends open circuit fault information to the monitoring end through wireless communication. Through the real-time collection and transmission of collected data, and the automatic control of the target induced polarization transmitter by the control end, real-time safety monitoring of the high induced polarization transmitter is achieved, thereby improving production safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of the structure of a monitoring system for induced polarization high voltage emission safety provided in one embodiment of the present application.

[0030] Figure 2 A schematic diagram of the specific structure of a monitoring system for induced polarization high voltage emission safety provided in one embodiment of the present application.

[0031] Figure 3 A schematic diagram of the workflow of a monitoring system for induced polarization high voltage emission safety provided in one embodiment of the present application.

[0032] Figure 4 This is a schematic diagram of an example error code provided in one embodiment of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0035] In an exemplary embodiment, a monitoring system for IP high voltage emission safety is provided. Figures 1-2 As shown, the monitoring system for the safety of induced polarization high-voltage transmission includes: a data acquisition module, a DC relay, a control module and a monitoring end; the DC relay is used to control the on and off of the target induced polarization transmitter; the data acquisition module, the DC relay and the monitoring end are all connected to the control module.

[0036] The data acquisition module is used to calculate the grounding resistance in the induced polarization transmission loop of the target induced polarization transmitter in real time, and send the grounding resistance calculated in real time to the control module.

[0037] The control module is used to send the grounding resistance received in real time to the monitoring end, and when the grounding resistance is greater than the set resistance threshold, it controls the DC relay to disconnect the DC bus voltage of the target electrostatic transmitter, and sends open circuit fault information to the monitoring end through wireless communication to protect personnel safety.

[0038] This application determines leakage, open circuit, and short circuit conditions based on the ground resistance and stability. A short circuit is considered when the calculated ground resistance is less than 1 ohm.

[0039] The DC relay is specifically a high-voltage DC relay, more specifically a high-voltage ceramic vacuum DC relay. The monitoring system for induced polarization high-voltage emission safety also includes a driver for the DC relay, and the driver is connected to the control module.

[0040] This application monitors safety hazards such as leakage, short circuits, vandalism, and animal damage to the transmitter line, improving data collection quality and operational safety. Furthermore, the use of a tablet computer for human-computer interaction increases the flexibility of controlling the target IP transmitter.

[0041] The duty cycle of the induced polarization emission waveform of the target induced polarization transmitter is 50%, and the period of the induced polarization emission waveform is 8 seconds, 16 seconds, 32 seconds or 64 seconds.

[0042] The data acquisition module includes an isolation current and voltage sampling unit and a ground resistance calculation unit.

[0043] The isolated current and voltage sampling unit is used to collect the transmission voltage and loop current of the transmission loop of the target IP transmitter. Specifically, the isolated current and voltage sampling unit collects the voltage (transmission voltage) and current (loop current) during forward power supply and reverse power supply.

[0044] The grounding resistance calculation unit is used to calculate the grounding resistance according to the transmission voltage and loop current collected by the isolation current and voltage sampling unit. Grounding resistance = transmission voltage / loop current.

[0045] This application determines the state of the transmitting circuit based on the change in ground resistance and controls the high-voltage vacuum relay. Passive measurement of the loop ground resistance does not affect the transmitting circuit and the IP receiver data acquisition.

[0046] The data acquisition module also includes a synchronous acquisition unit for synchronously acquiring the input voltage, input current, output voltage, and output current of the DC relay at a set sampling frequency, and transmitting the input voltage, input current, output voltage, and output current to the control module in real time. The sampling frequency is set to 1000 Hz.

[0047] The control module is also used to judge the quality of the DC relay based on the collected input voltage, input current, output voltage and output current, and send an error code to the monitoring end. The error code involved is as follows: Figure 4 Specifically, it includes the following aspects.

[0048] (1) When the ground resistance is greater than the set resistance threshold, the DC bus voltage of the target IP transmitter is disconnected by controlling the DC relay, and an open circuit fault message is sent to the monitoring terminal via wireless communication. The open circuit fault message is represented by the error code 01.

[0049] (2) When the fluctuation of the grounding resistance is greater than the set fluctuation value, leakage fault information is sent to the monitoring end via wireless communication. The leakage fault information is represented by error code 02, and the tablet computer displays error code 02.

[0050] (3) When the input voltage is greater than a first set safety voltage threshold, input overvoltage information is sent to the monitoring end via wireless communication, and the input overvoltage is represented by an error code 03.

[0051] (4) When the input current is greater than the first set current threshold, input overcurrent information is sent to the monitoring end via wireless communication, and the input current is represented by an error code 04.

[0052] (5) When the output voltage is greater than the second set safety voltage threshold, output overvoltage information is sent to the monitoring end via wireless communication, and the output overvoltage is represented by an error code 05.

[0053] (6) When the input current is greater than the second set current threshold, output overcurrent information is sent to the monitoring end via wireless communication, and the output overcurrent is represented by error code 06.

[0054] (7) When the high-voltage DC relay cannot be normally attracted or released, the system reports a high-voltage DC relay fault, which is indicated by error code 07.

[0055] (8) When data communication between internal modules is interrupted or the signal is abnormal, the system determines it as a communication error and the tablet computer displays error code 08, that is, the communication error is represented by error code 08.

[0056] (9) When an active manual shutdown command is detected, the system enters the manual shutdown state, and the manual shutdown uses error code 09.

[0057] The data acquisition module includes a 24-bit analog-to-digital conversion unit, which is used to convert the analog signals of the input voltage, the input current, the output voltage and the output current collected by the synchronous acquisition unit into digital signals.

[0058] The monitoring terminal is used to input the set resistance threshold, and the monitoring terminal is also used to send a disconnection instruction to the control module. The control module is used to control the DC relay to disconnect the DC bus voltage of the target IP transmitter after receiving the disconnection instruction.

[0059] The monitoring terminal includes a tablet computer and an LCD liquid crystal display screen, and both the tablet computer and the LCD liquid crystal display screen are used to display the grounding resistance.

[0060] Through the monitoring terminal, such as a tablet computer, the transmission current and ground resistance are monitored in real time. The tablet computer can be used to intervene and actively stop the transmission at any time. Wireless control does not require contact with the transmitter to ensure the safety of the transmitter operator.

[0061] This application uses a tablet computer to monitor and operate via Wi-Fi, using wireless communication to isolate high-voltage equipment and ensure personnel safety. The tablet computer is used to set parameters such as the trigger threshold to prevent the normal slow changes in ground resistance in different terrains and landforms from affecting the transmission.

[0062] The target polarization transmitter is a constant voltage transmitter or a constant current transmitter.

[0063] The control module includes a main control unit (FPGA) and an embedded controller (MCU). The FPGA is a parallel processor that synchronously collects input and output currents and voltages. The embedded controller is a serial processor responsible for communication and data storage.

[0064] The monitoring system for IP high voltage emission safety in this application also includes a data storage device, a GPS timing and positioning unit, a data acquisition module (voltage and current acquisition module) and a WIFI module. The data storage device uses an SD card.

[0065] The FPGA uses the fourth-generation Altera Cyclone series, the EP4CE10F17C8N chip, which offers low power consumption, high performance, extensive resources, and ease of use. It uses a 256-pin ball grid array (BGA) package.

[0066] The FPGA is the core of the entire system, configuring various peripherals, controlling the 24-bit analog-to-digital conversion unit through SPI communication, configuring and receiving GPS information through USART communication, communicating with the GPS timing and positioning unit and the WIFI module through USART communication, controlling the high-voltage DC relay through the isolation drive circuit, controlling the LCD display through the parallel interface, and sending the collected data to the embedded controller through USART communication. The embedded controller collects the data to a large-capacity SD card through the SDIO drive.

[0067] The ADS1274 is the core chip of the analog-to-digital conversion module. It has multiple operating modes and a sampling rate of up to 128kSPS, meeting the needs of high-speed dynamic signal capture. It communicates with the main control FPGA via SPI. The acquisition board has a default sampling rate of 52k SPS after power-on. Its operating mode can be modified on the WiFi tablet, and its sampling rate can be set in real time. The acquisition board continuously outputs the collected data.

[0068] The GPS timing and positioning unit uses the ATK-S1216F8-BD chip, which communicates with the main control unit FPGA via USART. The GPS positioning data output by the GPS positioning unit uses the NMEA-0183 protocol, and the control protocol is the SkyTraq protocol. The FPGA receives NMEA protocol data transmitted from the serial port and interprets satellite positioning information, including UTM date and time, latitude and longitude coordinates, elevation, number of GPS satellites, etc. The FPGA can also set the GPS sampling rate, baud rate, output information, etc. through the SkyTraq control protocol. At the same time, parameters such as the sampling rate and baud rate can be modified in real time on the WiFi tablet. The default baud rate is 9600, the stop bit is 1, the data bits are 8, and there is no parity bit.

[0069] The embedded controller uses an STM32 microcontroller (GD32F103ZET6) as the core of the embedded system. It is connected to the FPGA through USART1, and a FATFS file system is built internally. At the same time, it is connected to the SD card through the Secure Digital Input and Output (SDIO) interface. It adopts a 4-wire SDIO drive mode. The data written to the SD card uses the DMA transmission mode to reduce CPU occupancy. The data received by the serial port is sorted as a time series file and stored in a large-capacity SD card as a TXT document. The storage interval is 1 second for one group of data. The stored data includes: the current location time, longitude and latitude, instrument serial number, the working status of each module of the system, the collected current and voltage values, the safety status and data during automatic fault diagnosis, the module has been running for a long time, the number of times the instrument has been powered on, and the calculated ground resistance value.

[0070] The 24-bit analog-to-digital conversion chip used by the 24-bit analog-to-digital conversion unit is ADS1274 from Texas Instruments, the GPS timing and positioning unit uses a GPS+Beidou dual-mode positioning module, the SD card capacity is 32G, the LCD display resolution is 320*240, the high-voltage DC relay model is JPK-2, the core chip of the data acquisition module is ACS724, and the core chip of the WIFI module is ESP8266.

[0071] The LCD displays the system's operating status and information. When the system is powered on, it displays the instrument's serial number; the number of available GPS and Beidou satellites, latitude and longitude, elevation, and UTC time; the parameters set for each module; the total SD card capacity, used space, and remaining space; the voltage, current, and resistance values ​​currently being collected; the system's operating time, safety status, and the cause of any automatic fault diagnosis.

[0072] The high-voltage DC relay uses a JPK-2 relay with a rated operating voltage of 12kV and a maximum current of 30A. It features a contact resistance of 0.025Ω or less and an insulation resistance of 10GΩ or more. It uses a sealed ceramic housing and a 5-pin physical interface (common / NO / NC / Coil+ / Coil-). It is connected to the main control unit FPGA for control via an isolated drive circuit.

[0073] The core chip of the data acquisition module is the ACS724, a high-precision current sensor based on the Hall effect principle. It has a range of -50A to 50A and an accuracy of 40mV / A. Its VIOUT pin is connected to the analog-to-digital converter module, and the main control unit calculates the current value by reading the voltage value of the analog-to-digital converter module.

[0074] The Wi-Fi module's core chip is the ESP8266. The main control unit FPGA communicates with it via USART at a baud rate of 115,200 bps. The data format is 8 data bits, 1 stop bit, and no parity bit. The Wi-Fi module is connected to the remote tablet via wireless communication. The main control unit FPGA communicates with the Wi-Fi module, allowing the remote tablet to control the main control unit FPGA's parameter status. This uses wireless communication to isolate high-voltage equipment and protect personnel.

[0075] The present application provides a monitoring system for electromagnetic high-voltage emission safety, which also includes a power supply module. The power supply module is used to provide digital 3.3V voltage, 5V voltage and 15V voltage, and provide ±5V and ±15V for op amps. An isolated power supply module is used to reduce ripple and eliminate common-mode interference.

[0076] The power module is powered by a 12V lithium battery and requires ±15V and ±5V voltages for the operational amplifier, using a rail-to-rail op amp. The ±15V and ±5V voltages are used by analog circuits, which require low noise. A DC-DC converter is used to boost the 12V lithium battery to 15V. Low-dropout linear regulators (LDOs) are used to provide 5V and 3.3V voltages for the digital circuits. These regulators offer low ripple and are suitable for low-voltage, low-power digital circuits.

[0077] like Figure 3 As shown, the workflow of a monitoring system for induced polarization high voltage emission safety in the present application includes the following steps.

[0078] Step 1. Connect the wires to the measuring terminals of the power supply line and the high-voltage DC relay according to the specifications.

[0079] Step 2. Connect the GPS antenna to the system and power on the system.

[0080] Step 3. After setting the parameters of each module through the WIFI tablet, the system is self-checked and starts to work.

[0081] Step 4. If an error occurs, the system automatically diagnoses the fault, sends an error code to the WIFI tablet, and quickly controls the relay to physically disconnect the switch.

[0082] Step 5. If no error is sent, the tablet displays the setting parameters, measurement values, and waveforms in real time.

[0083] Step 6. After the system ends work, the SD card is taken out to read the historical measurement values.

[0084] The application passively measures the grounding resistance, does not affect the normal work of the target IP transmitter, starts safety monitoring when the transmission voltage is greater than the safe voltage of 36V, calculates the grounding resistance based on the transmission voltage and loop current in the transmission loop, judges open circuit, short circuit, and leakage, etc. The maximum can mechanically shut down the 3000V DC bus voltage, physically isolate the input and output; can timely detect human damage, cattle, horses, sheep, etc. biting the power line to cause the transmission loop to be open, automatically shutting down the high-voltage transmission output, avoiding safety accidents of personnel and livestock; and can timely detect local leakage caused by rain and moisture, ensuring that effective data can be collected. The transmission waveform can be viewed in real time through the tablet and mobile phone, and the transmission can be wirelessly shut down in case of an emergency to ensure safe production, which has high practical value.

[0085] Compared with the existing IP high-voltage transmission safety monitoring system, the application has the following advantages:

[0086] (1) High data detection accuracy and high real-time performance.

[0087] Prior art: The traditional system mostly uses MCU single-core processing, has low sampling rate, and is prone to timing conflicts when multiple channels are synchronously collected; the number of analog-to-digital conversion bits is low (below 16 bits), and the ability to identify small current changes is insufficient; the fault response delay is > 50 ms, which cannot meet the demand for fast shutdown of high-voltage transient faults.

[0088] The application uses FPGA as the main control unit, performs fast through parallel processing, and is equipped with a 24-bit AD chip, which can collect data through four channels at the same time and send it to the main control unit through SPI communication, has fast sampling rate and high precision bits. At the same time, it communicates with the WIFI module through USART communication, can adjust the measurement parameters in real time, and realizes low latency.

[0089] (2) Simple and convenient operation.

[0090] Prior art: The traditional system relies on PC-side configuration software, and the layout needs to be operated by professional geophysical prospecting personnel; the hardware connection is complex, and the operation efficiency is low.

[0091] The application is simple to operate and does not require a geophysical engineer with professional training to operate. The GPS antenna and the measuring end are only needed to be connected, and the data can be automatically collected after the start. The geophysical auxiliary personnel can quickly set up the IP high-voltage transmission safety monitoring system to carry out IP work, which is low in cost and high in efficiency.

[0092] (3) Automatic fault diagnosis and high safety.

[0093] Prior art: The traditional system relies on a single mechanical relay for electrical isolation, with a delay of > 20ms, high arc risk, and the inability to determine the cause of the fault, which requires manual further detection.

[0094] The application adopts a magnetic latching type high-voltage relay, which realizes complete electrical isolation of the input / output end through mechanical contacts, physically cuts off the current path, and has high safety. At the same time, according to the collected input voltage, input current, output voltage, output current and the state of each sensor, the cause of the fault is automatically detected.

[0095] (4) Data is intuitive and easy to understand, and is highly operable.

[0096] Prior art: The data storage of the traditional system is binary raw data, which needs to be analyzed by special software; visualization relies on post-processing, and on-site decision support is weak.

[0097] The application sends the data collected by the main control unit FPGA to the embedded controller through the USART communication mode, the embedded controller builds a FATFS file system, stores the collected grounding resistance, input voltage, input current, output voltage, output current and the state of each sensor into the SD card, and sorts them according to the time sequence file. The post-processing data visualization is strong and the quality is controllable.

[0098] Based on the same inventive concept, the embodiments of the application also provide a monitoring method for IP high-voltage transmission safety for realizing the monitoring system for IP high-voltage transmission safety as described above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme described in the above method, so the specific limitations in one or more monitoring methods for IP high-voltage transmission safety embodiments provided below can be referred to the limitations of the monitoring system for IP high-voltage transmission safety in the above, which will not be repeated here.

[0099] In one exemplary embodiment, a monitoring method for IP high-voltage transmission safety is provided, which applies the monitoring system for IP high-voltage transmission safety, and the monitoring method for IP high-voltage transmission safety includes steps 101-102.

[0100] Step 101: The data acquisition module calculates the grounding resistance in the active electric emission loop of the target active electric transmitter in real time, and sends the real-time calculated grounding resistance to the control module.

[0101] Step 102: The control module sends the real-time received grounding resistance to the monitoring end, and when the grounding resistance is greater than the set resistance threshold, the control module disconnects the DC bus voltage of the target active electric transmitter through the control of the DC relay, and sends the open-circuit fault information to the monitoring end through wireless communication.

[0102] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0103] The principles and implementation modes of the present application are described by using specific examples herein, and the above embodiment descriptions are only used to help understand the method and core idea of the present application. Meanwhile, for those skilled in the art, the specific implementation modes and application ranges can be changed according to the idea of the present application. In summary, the content of the present application should not be understood as a limitation.

Claims

1. A monitoring system for induced polarization high voltage emission safety, characterized in that: The monitoring system for induced polarization high voltage emission safety includes: a data acquisition module, a DC relay, a control module and a monitoring terminal; the data acquisition module, the DC relay and the monitoring terminal are all connected to the control module; The data acquisition module is used to calculate the ground resistance in the IP transmission loop of the target IP transmitter in real time, and send the ground resistance calculated in real time to the control module; The control module is used to send the grounding resistance received in real time to the monitoring end, and when the grounding resistance is greater than the set resistance threshold, it controls the DC relay to disconnect the DC bus voltage of the target polarization transmitter and sends open circuit fault information to the monitoring end via wireless communication.

2. The monitoring system for induced polarization high voltage emission safety according to claim 1, characterized in that: The data acquisition module includes an isolation current and voltage sampling unit and a ground resistance calculation unit; The isolated current and voltage sampling unit is used to collect the transmission voltage and loop current of the transmission loop of the target induced polarization transmitter; The ground resistance calculation unit is used to calculate the ground resistance according to the transmission voltage and loop current collected by the isolation current and voltage sampling unit.

3. The monitoring system for induced polarization high voltage emission safety according to claim 2, characterized in that: The data acquisition module also includes a synchronous acquisition unit, which is used to synchronously acquire the input voltage, input current, output voltage and output current of the DC relay according to a set sampling frequency, and send the input voltage, input current, output voltage and output current to the control module in real time.

4. The monitoring system for induced polarization high voltage emission safety according to claim 3, characterized in that: The control module is further configured to: When the fluctuation of the grounding resistance is greater than a set fluctuation value, leakage fault information is sent to the monitoring terminal via wireless communication; When the input voltage is greater than a first set safety voltage threshold, sending input overvoltage information to the monitoring end via wireless communication; When the input current is greater than a first set current threshold, sending input overcurrent information to the monitoring end via wireless communication; When the output voltage is greater than a second set safety voltage threshold, output overvoltage information is sent to the monitoring end via wireless communication; When the input current is greater than the second set current threshold, output overcurrent information is sent to the monitoring end via wireless communication.

5. The monitoring system for induced polarization high voltage emission safety according to claim 3, characterized in that: The data acquisition module includes a 24-bit analog-to-digital conversion unit, which is used to convert the analog signals of the input voltage, the input current, the output voltage and the output current collected by the synchronous acquisition unit into digital signals.

6. The monitoring system for induced polarization high voltage emission safety according to claim 1, characterized in that: The monitoring terminal is used to input the set resistance threshold, and the monitoring terminal is also used to send a disconnection instruction to the control module. The control module is used to control the DC relay to disconnect the DC bus voltage of the target IP transmitter after receiving the disconnection instruction.

7. The monitoring system for induced polarization high voltage emission safety according to claim 1, characterized in that: The monitoring terminal includes a tablet computer and an LCD liquid crystal display screen, and both the tablet computer and the LCD liquid crystal display screen are used to display the grounding resistance.

8. The monitoring system for induced polarization high voltage emission safety according to claim 1, characterized in that: The target polarization transmitter is a constant voltage transmitter or a constant current transmitter.

9. The monitoring system for induced polarization high voltage emission safety according to claim 1, characterized in that: The control module adopts FPGA.

10. A method for monitoring the safety of induced polarization high voltage emission, characterized in that: The monitoring method for induced polarization high voltage emission safety applies the monitoring system for induced polarization high voltage emission safety according to any one of claims 1 to 9, and the monitoring method for induced polarization high voltage emission safety includes: The data acquisition module calculates the ground resistance in the IP transmission loop of the target IP transmitter in real time, and sends the calculated ground resistance to the control module; The control module sends the real-time grounding resistance received to the monitoring end, and when the grounding resistance is greater than the set resistance threshold, it controls the DC relay to disconnect the DC bus voltage of the target IP transmitter and sends open circuit fault information to the monitoring end via wireless communication.

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