Multi-point grounding current synchronous low-power-consumption monitoring method and related device

Abstract

The invention belongs to a current monitoring method, and provides a multi-point grounding current synchronous low-power-consumption monitoring method and a related device which are used for collecting grounding current data of each point, converting the grounding current data into digital signals, collecting the digital signals, analyzing and judging the digital signals, and then carrying out safety monitoring on equipment. When the multi-point grounding current is collected, the local clock is synchronously calibrated in real time by means of the time information extracted from the real-time satellite signal. Besides, when analog signal processing and grounding current data transmission of each point are carried out, low power consumption of a monitoring process is realized by controlling full deviation and grounding current data amplitude of each point and adjusting transmitting power. The state of the transformer substation grounding grid can be monitored in real time, and potential grounding faults can be found in time.

Description

Technical Field

[0001] The present application relates to a current monitoring method, and specifically to a multi-point ground current synchronous low-power monitoring method and related devices. Background Art

[0002] The ground wire refers to a metal wire connected to the ground in a substation or other power facilities, which mainly plays a safety protection role. Under normal circumstances, no current will pass through the ground wire, but when a device or line fails, the ground wire can conduct current into the ground to protect personal safety and the normal operation of the equipment. Studies have shown that abnormal changes in ground current can reflect the type of fault in power equipment. Therefore, the operating status of the equipment can be intuitively reflected by monitoring the ground current. In particular, the ground current can be monitored during normal operation and failure of the equipment, and then in the subsequent continuous monitoring, abnormalities in the equipment can be discovered in a timely manner based on changes in the ground current. Summary of the invention

[0003] In order to address the situation where the ground current may fluctuate abnormally when a device or line fails, the present application provides a multi-point ground current synchronous low-power consumption monitoring method and related devices. By synchronously and low-power real-time collection of multi-point ground currents, data support is provided for subsequent current analysis and fault diagnosis, thereby ensuring the stable operation of the power system.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions: In a first aspect, the present application proposes a multi-point ground current synchronous low-power monitoring method, comprising: Collect the ground current data at each point, process the analog signal, and convert it into the corresponding digital signal; Collect digital signals and analyze whether the ground current data at each point exceeds the safety threshold; The time synchronization method for collecting ground current data at each point includes: Extract time information from real-time satellite signals as a time reference; The local clock when collecting the ground current data at each point is calibrated in real time by using the time reference; the real-time synchronization calibration is achieved by transmitting and calculating different timestamps carried in the message; Wherein, the analog signal processing comprises: After filtering the ground current data at each point, the amplification factor of the ground current data at each point is controlled so that the full deviation of the ground current data at each point within the corresponding range meets the preset requirements; and the amplitude of the ground current data at each point after filtering is within the preset range; Wherein, the method for transmitting the ground current data at each point includes: The transmission power during the transmission of ground current data at each point is inversely proportional to the communication quality.

[0005] Furthermore, the real-time synchronous calibration also includes: If the stability of the real-time satellite signal deviates from the preset range, or the real-time satellite signal is interrupted, the local clock when collecting the ground current data at each point is synchronized and calibrated through the precise time protocol timing strategy.

[0006] Furthermore, the real-time synchronous calibration is implemented by transmitting and calculating messages carrying different timestamps, including: The end for collecting the ground current data of each point is taken as the collection side, and the end from which the ground current data of each point comes is taken as the terminal side; Calculating network latency :

[0007] Calculate the clock offset value :

[0008] in, Indicates the time when the first message is sent by the collection side. Indicates the time when the terminal side receives the first message, Indicates the time when the terminal sends the second message. Indicates the time when the collection side receives the second message. ; According to network delay and clock offset value Realize real-time synchronous calibration.

[0009] Further, the network delay and clock offset value When achieving real-time synchronous calibration, it also includes: Record the clock offset values ​​of two consecutive times ; According to the clock offset values ​​of two adjacent , calculate the deviation between the actual clock frequency and the corresponding theoretical value; Clock compensation is performed in the next timely cycle based on the deviation between the actual clock frequency and the corresponding theoretical value.

[0010] Furthermore, the time synchronization method for collecting ground current data at each point also includes: The current time when the record is collected ; Calculate the time offset after the acquisition is completed , calculate and synchronize the exact synchronization time .

[0011] Furthermore, the analog signal processing further includes: The control makes the phase of the ground current data at each point after filtering consistent with the phase of the signal of the source of the ground current data at each point.

[0012] Furthermore, the collecting of ground current data at each point also includes: Send a wake-up code to the terminal side corresponding to the ground current data of each point respectively, and after receiving a reply from the terminal side, start collecting the corresponding ground current data; The conversion into a corresponding digital signal also includes: When a wake-up code is received, a pulse signal is sent out at the same time to perform the conversion process.

[0013] In a second aspect, the present application proposes a multi-point ground current synchronous low-power monitoring system, comprising: The acquisition and conversion module is used to collect the ground current data of each point, process the analog signal, and convert it into the corresponding digital signal; A collection and analysis module is used to collect digital signals and analyze whether the ground current data at each point exceeds the safety threshold; The time synchronization method for collecting ground current data at each point includes: Extract time information from real-time satellite signals as a time reference; The local clock when collecting the ground current data at each point is calibrated in real time by using the time reference; the real-time synchronization calibration is achieved by transmitting and calculating different timestamps carried in the message; Wherein, the analog signal processing comprises: After filtering the ground current data at each point, the amplification factor of the ground current data at each point is controlled so that the full deviation of the ground current data at each point within the corresponding range meets the preset requirements; and the amplitude of the ground current data at each point after filtering is within the preset range; Wherein, the method for transmitting the ground current data at each point includes: The transmission power during the transmission of ground current data at each point is inversely proportional to the communication quality.

[0014] In a third aspect, the present application proposes an electronic device, comprising: a memory, and one or more processors; the memory is coupled to the processor; wherein computer program code is stored in the memory, and the computer program code includes computer instructions, and when the computer instructions are executed by the processor, the electronic device executes the steps of the above-mentioned multi-point ground current synchronous low-power consumption monitoring method.

[0015] In a fourth aspect, the present application proposes a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned multi-point ground current synchronous low-power monitoring method are implemented.

[0016] Compared with the prior art, this application has the following beneficial effects: The present application proposes a method for synchronous low-power monitoring of multi-point grounding currents, which collects grounding current data at each point, converts it into digital signals, and then aggregates them for analysis and judgment, thereby safely monitoring the equipment. When collecting multi-point grounding currents, the present application uses the time information extracted from the real-time satellite signal to perform real-time synchronous calibration of the local clock. In addition, when performing analog signal processing and transmitting grounding current data at each point, low power consumption of the monitoring process is achieved by controlling the full-scale deviation and the amplitude of the grounding current data at each point, as well as adjusting the transmission power. The present application can monitor the status of the substation grounding network in real time, detect potential grounding faults in a timely manner, thereby avoiding system power outages or equipment damage caused by faults, and improves monitoring accuracy and practicality through synchronous low-power monitoring.

[0017] The present application also proposes a multi-point ground current synchronous low-power monitoring system, electronic device and computer storage medium, which have all the advantages of the above-mentioned multi-point ground current synchronous low-power monitoring method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 This is a first flow chart of the method for synchronous low-power monitoring of multi-point ground current in this application; Figure 2 A schematic diagram of a composition of an implementation method of the multi-point ground current synchronous low-power monitoring method of the present application; Figure 3 A schematic diagram of a multi-terminal high-precision synchronization protocol and an optimal estimation algorithm for time differences; Figure 4 A schematic diagram of a time synchronization method; Figure 5 Schematic diagram of the strategy to make the signal fully deflected within the range; Figure 6 A schematic diagram of a multi-point ground current synchronous low-power monitoring system of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the embodiments of the present application, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the invented product is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] The ground wire is used to quickly conduct abnormal current to the ground when a device or line encounters a fault, ensuring the safe and stable operation of the equipment.

[0027] When an electrical device or line fails, the ground wire will conduct the current generated by the fault into the earth.

[0028] Changes in ground current are often closely related to the type of fault in power equipment. Therefore, by accurately monitoring the dynamic changes in ground current, we can intuitively understand the operating status of the equipment. This monitoring method has significant advantages: during normal operation of the equipment, the baseline value of the ground current can be recorded; once the equipment fails, the ground current will show abnormal changes, which can not only help us detect abnormal conditions of the equipment in a timely manner, but also provide us with valuable clues about the type and location of the fault.

[0029] Based on the above situation, the present application proposes a multi-point ground current synchronous low-power monitoring method and related devices, and the present application is described in detail below in conjunction with the embodiments and drawings.

[0030] like Figure 1 As shown, it is a first flow chart of the method for synchronous low-power monitoring of multi-point ground current of the present application, which may include: S101, collecting ground current data at each point, performing analog signal processing, and converting the analog signal into a corresponding digital signal.

[0031] In practical applications, high-precision current sensors or measuring instruments can be used to arrange measurement points at various grounding points in the power system to collect ground current data in real time. These sensors can have high sensitivity, low noise and other characteristics to ensure the accuracy of the data. Then use a high-resolution ADC (Analog-to-Digital Converter) to convert the ground current data that has been processed by analog signals into digital signals. The sampling rate and resolution of the ADC can be selected according to actual needs to ensure that the digitized data can accurately reflect the characteristics of the original signal.

[0032] S102, collecting digital signals and analyzing whether the ground current data at each point exceeds a safety threshold.

[0033] The converted digital signals of each measuring point are collected together through a communication network (such as Ethernet, wireless LAN, etc.), and the collected digital signals are analyzed to extract the ground current data of each point. The safety threshold of the ground current can be set according to the safety standards or design requirements of the power system. This threshold may vary due to different power systems, equipment types, operating environments and other factors. The ground current data of each point is compared with the corresponding safety threshold to determine whether there is a situation that exceeds the threshold.

[0034] In actual applications, exception handling or alarms can be performed based on this judgment. For example, if the ground current data at a certain point is found to exceed the safety threshold, the exception handling mechanism is immediately triggered, including sending an alarm message to the operation and maintenance personnel, automatically cutting off the relevant circuits, etc. to protect the safety of the equipment. In order to more accurately understand the equipment status, the alarm information can also include detailed information such as the location of the measurement point that exceeds the threshold, the time of exceeding, and the degree of exceeding, so that the operation and maintenance personnel can quickly locate the problem and take corresponding measures.

[0035] The following improvements were made during the above process: 1. The time synchronization method for collecting ground current data at each point includes: (1) Extract time information from real-time satellite signals as a time reference.

[0036] (2) The local clock when collecting the ground current data at each point is calibrated in real time by using the time reference; the real-time synchronization calibration is achieved by transmitting and calculating different timestamps carried in the message.

[0037] Using the precise time information provided by satellite navigation systems such as GPS (Global Positioning System) or BeiDou as the time reference for the entire data collection process can ensure that the timestamps of all collection points are uniform and accurate. The local clock is calibrated in real time using the received satellite time information. The calibration process can be achieved through message transmission methods such as the Network Time Protocol (NTP) or the Precision Time Protocol (PTP). The message carries the satellite timestamp and the local timestamp, and the local clock is adjusted by calculating the time difference.

[0038] 2. The analog signal processing comprises: (1) After filtering the ground current data at each point, the amplification factor of the ground current data at each point is controlled so that the full-scale deviation of the ground current data at each point within the corresponding range meets the preset requirements; and the amplitude of the ground current data at each point after filtering is within the preset range.

[0039] A low-pass filter or a band-pass filter is used to remove high-frequency noise and interference signals in the ground current data and retain useful low-frequency components. The selection of the filter can be determined according to the characteristics of the ground current signal. Then, according to the magnitude of the ground current, the gain of the amplifier is dynamically adjusted so that the ground current data at each point reaches the preset requirement of full deviation within the corresponding range, which can ensure that the data will not be distorted due to range mismatch during the digitization process. The amplitude of the filtered ground current data can also be adjusted to the range that the analog-to-digital converter (ADC) can handle through an attenuator or gain controller to ensure the accuracy of the digitization process.

[0040] 3. The method for transmitting the ground current data at each point comprises: The transmission power during the transmission of ground current data at each point is inversely proportional to the communication quality.

[0041] During data transmission, the transmit power is dynamically adjusted according to the quality of the communication link. When the communication quality is good, the transmit power is reduced to save energy and reduce interference; when the communication quality is poor, the transmit power is increased to ensure reliable data transmission. This control method can evaluate the communication quality by measuring indicators such as signal strength and bit error rate, and adjust the transmit power according to the evaluation results. It can not only improve the efficiency and reliability of data transmission, but also extend the service life of communication equipment.

[0042] The following further describes in detail the multi-point ground current synchronous low-power monitoring method of the present application through some embodiments.

[0043] like Figure 2 As shown, it is a schematic diagram of the composition of an implementation method of the multi-point ground current synchronous low-power monitoring method of the present application. As an implementation method of the present application, it can include a satellite receiving module, a ground current data acquisition module, a logic control module, a wireless communication module and a cloud processor: (1) The satellite receiving module obtains time information by receiving electromagnetic wave signals transmitted by satellites; (2) The ground current data acquisition module includes a collector and a concentrator. The collector and concentrator calculate the received time interval and perform A / D conversion on the collected ground current data at each point. In this process, a multi-terminal high-precision synchronization protocol and a time difference optimal estimation algorithm are proposed to realize the concentrator standard time calibration, internal time synchronization of each terminal, and precise timing and calibration to ensure high-precision synchronous data acquisition. In practical applications, the collector is mainly responsible for collecting ground current data at each grounding point of the substation. The concentrator is mainly used to receive data from multiple collectors and perform preliminary processing and time interval calculation on these data.

[0044] (3) The wireless communication module and the remote processor transmit and process the data synchronously, and a variable-range ultra-low power sensing and control strategy is proposed to reduce the power consumption of embedded devices during the data collection process and improve the applicability of this method in substations.

[0045] It should be noted that the logic control module is responsible for the logic control and coordination of the entire system, ensuring efficient collaboration between various modules. According to the preset logic rules, the collected data is screened and sorted, and the data transmission and processing process is controlled.

[0046] like Figure 3The figure shows a schematic diagram of the multi-terminal high-precision synchronization protocol and the optimal estimation algorithm of the time difference. When performing time synchronization, the satellite timing system located outside the station can maintain time synchronization and use the calibrated time as the time reference. The concentrator synchronizes time with each terminal device through wired or wireless communication, and introduces the network PTP (Precision Time Protocol) timing strategy as a backup. When the satellite timing signal is affected by weather, geographical location or other reasons, the PTP timing strategy takes over the time synchronization task to ensure system stability.

[0047] Specifically, the satellite system used for satellite timing is usually equipped with a high-precision atomic clock, which can provide a very accurate and stable time signal. The off-site system receives the satellite signal through the satellite receiving module and extracts the time information therein. Then, the system uses this calibrated time as a reference benchmark and synchronizes the time with each terminal device through wired or wireless communication methods (such as Ethernet, Wi-Fi, 4G / 5G, etc.). This ensures that the clock of the entire off-site system remains consistent, thereby improving the accuracy and reliability of data processing. PTP is a high-precision time synchronization protocol based on the IEEE 1588 standard that can achieve sub-microsecond time synchronization accuracy in network communication. PTP adopts a master-slave time synchronization system. The master clock periodically sends a time synchronization message, and the slave clock receives the message and adjusts its own clock according to the time information therein. By combining satellite timing and PTP timing strategies, the system implements a redundant design. Even if one of the timing methods fails or is affected, the other method can still ensure the continuity and stability of time synchronization.

[0048] like Figure 4 The figure shows a schematic diagram of a time synchronization method. Figure 4 The left side shows the meaning and calculation formula of each time, among which message 1 carries Time, carried in message 2 Time, carried in message 3 time. The network delay is The clock offset value is Specifically, one end for collecting the ground current data at each point is used as the collection side, and one end for the source of the ground current data at each point is used as the terminal side.

[0049] Calculating network latency :

[0050] Calculate the clock offset value :

[0051] in, Indicates the time when the first message is sent by the collection side. Indicates the time when the terminal side receives the first message, Indicates the time when the terminal sends the second message. Indicates the time when the collection side receives the second message. . The full-scale time is accurate to the second, while other times only contain the accurate time of the second and its subsequent levels.

[0052] According to network delay and clock offset value Realize real-time synchronization calibration. Network delay refers to the time required for a data packet to be transmitted from the sender to the receiver. In the time synchronization process, this usually includes the total time required to send a message, transmit a message, and receive a message. The clock offset value refers to the time difference between the terminal clock and the master clock, which is caused by factors such as the drift of the terminal clock, inaccurate initial settings, or network delay. Changes in network delay will directly affect the accuracy of time synchronization. Therefore, it is necessary to minimize network delay and consider the impact of its changes on the accuracy of time synchronization. In addition, once the clock offset value is calculated, the terminal can adjust its own clock to keep in sync with the master clock.

[0053] Using the above method, the terminal side only needs to store time, and completes one subtraction and shift operation, ensuring that power consumption and computational burden are reduced to a certain extent.

[0054] In some embodiments of the present application, a compensation algorithm can also be used to compensate for the timing error caused by individual differences in clock devices, specifically recording the clock offset of the last two time synchronizations. , and then calculate the deviation between the actual clock frequency and the theoretical value, and use the deviation value as clock compensation in the next timing cycle to calibrate the clock of the device and improve the timing accuracy. The compensation algorithm can significantly reduce the timing error caused by individual differences in clock devices and improve the timing accuracy. The compensation algorithm can also dynamically adjust the compensation amount according to the actual clock offset value, which has strong adaptability and can maintain high timing accuracy even when the performance of the clock device changes.

[0055] Through the above-mentioned multi-terminal high-precision synchronization protocol and the optimal estimation algorithm of time difference, the concentrator standard time calibration, the internal time synchronization of each terminal and the precise timing and calibration can be realized.

[0056] As an embodiment, the variable range ultra-low power consumption sensing and control strategy may include three parts: variable range sampling, synchronous acquisition wireless communication strategy and control logic optimization.

[0057] like Figure 5As shown in the figure, it is a schematic diagram of the strategy to make the signal fully biased within the range. When processing signals, especially before converting analog signals to digital signals (ADC), it is crucial to ensure that the signal is within the appropriate range. It is not only related to the accuracy of the conversion, but also directly affects the accuracy and efficiency of subsequent digital signal processing. When the signal exceeds or falls below the range of the ADC, it is an effective solution to adjust the gain or attenuation factor to make the signal close to the full-scale input of the ADC. When the input signal is too large (overrange) or too small (underrange), the gain / attenuation factor adjustment module can be used to dynamically change the amplification factor of the signal. Therefore, no matter how the input signal changes, it can be adjusted to be close to the full range of the ADC, thereby maximizing the use of the ADC conversion range and improving the measurement accuracy. Gain / attenuation adjustment can be achieved through a programmable gain amplifier (PGA) or attenuator, which dynamically adjusts its gain or attenuation factor according to the control signal to adapt to input signals of different amplitudes. Automatic range adjustment can significantly improve the dynamic range and measurement accuracy of the system, especially in application scenarios where the signal amplitude changes greatly. It can also reduce the ADC saturation caused by excessive signal or the quantization noise problem caused by too small signal. In addition, in signal processing, in addition to amplitude adjustment, the phase adjustment circuit can ensure that the collected signal is advanced or lagged in phase to meet specific system requirements or compensate for the phase delay introduced by other circuit components. Phase adjustment can be achieved by a phase shifter or an all-pass filter, which can adjust the phase of the signal without changing the signal amplitude. It helps to ensure that the signal maintains the correct timing relationship during transmission or processing, thereby improving the overall performance of the system. In this embodiment, a 12-bit ADC conversion is used for analog-to-digital conversion, and the output of the signal gain / attenuation circuit is measured by an over / under range detection circuit and fed back to the gain / attenuation multiple adjustment. A reference voltage is set in both the 12-bit ADC conversion and the over / under range detection circuit as a reference.

[0058] In some embodiments of the present application, the synchronous acquisition wireless communication strategy may include reducing the signal transmission power and adjusting the air wake-up mechanism. First, the power consumption is reduced by reducing the signal transmission power. When the device is deployed, the optimal signal transmission power is determined by the signal strength detection and communication quality evaluation mechanism. During the operation of the device, when the number of consecutive failures in information transmission reaches a threshold, the transmission power is readjusted so that the communication quality and power consumption performance tend to be balanced. This dynamic adjustment mechanism can reduce power consumption as much as possible while ensuring the communication quality. Through the above mechanism, the system can find the best balance between power consumption and communication quality, which not only ensures the reliability of data transmission, but also prolongs the battery life of the device. Secondly, the air wake-up mechanism is used to reduce the running time and reduce power consumption. In the working state, it detects whether the concentrator sends a wake-up code. If the wake-up code is received, it starts to receive the information of the concentrator, and sends a pulse signal to wake up the main MCU or coprocessor that processes the received information. If the wake-up code is not received, it enters the sleep state and waits for the next wake-up interrupt to arrive. For the concentrator, when it needs to wake up the terminal, it continuously sends the wake-up code of the terminal until the terminal reply is received, and the duration is not less than the sleep cycle of the terminal. When the number of wake-up failures reaches the threshold, a relevant report is generated.

[0059] In terms of control logic optimization, a combination of sequential execution and interruption can be used to achieve low-power and high-efficiency data transmission by optimizing the time calibration mechanism. After the acquisition is completed, time synchronization is performed and the time deviation is calculated , then the exact time , the strategy only needs to ensure accurate timing and fast time synchronization in the short term. Even if there is clock drift or other time errors in the data acquisition process, accurate timestamps can be obtained through the time calibration mechanism. In practical applications, in the process of data acquisition, sequential execution can ensure that each step is carried out in a predetermined order, thereby avoiding data errors or system abnormalities caused by disordered steps. Interrupts are a very important function in microcontrollers. Their appearance enables microcontrollers to have the ability to deal with special situations when executing commands sequentially. For example, when data acquisition is completed, an interrupt signal can be triggered to notify the CPU to process or transmit data. This mechanism can improve the response speed and efficiency of the system, and also help reduce power consumption because the CPU does not need to continuously poll the status of data acquisition.

[0060] like Figure 6 As shown, it is a schematic diagram of a multi-point ground current synchronous low-power monitoring system of the present application, which may include: The acquisition and conversion module is used to collect the ground current data of each point, process the analog signal, and convert it into the corresponding digital signal; A collection and analysis module is used to collect digital signals and analyze whether the ground current data at each point exceeds the safety threshold; The time synchronization method for collecting ground current data at each point includes: Extract time information from real-time satellite signals as a time reference; The local clock when collecting the ground current data at each point is calibrated in real time by using the time reference; the real-time synchronization calibration is achieved by transmitting and calculating different timestamps carried in the message; Wherein, the analog signal processing comprises: After filtering the ground current data at each point, the amplification factor of the ground current data at each point is controlled so that the full deviation of the ground current data at each point within the corresponding range meets the preset requirements; and the amplitude of the ground current data at each point after filtering is within the preset range; Wherein, the method for transmitting the ground current data at each point includes: The transmission power during the transmission of ground current data at each point is inversely proportional to the communication quality.

[0061] It should be noted that in the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the system embodiments described above are merely schematic. For example, the division of each module is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules can be combined or integrated into another device, or some features can be ignored or not executed. The module described as a separate component may or may not be physically separated. The component displayed as a module may be a physical unit or multiple physical units, that is, it may be located in one place, or it may be distributed in multiple different places. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0062] In addition, each module in each embodiment of the present invention may be integrated into a processing unit, each module may exist physically separately, or two or more modules may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0063] An embodiment of the present application also provides an electronic device, which may include one or more processors, a memory, and a communication interface.

[0064] The memory, the communication interface and the processor are coupled, for example, the memory, the communication interface and the processor may be coupled together via a bus.

[0065] The communication interface is used for data transmission with other devices. The memory stores computer program code. The computer program code includes computer instructions, and when the computer instructions are executed by the processor, the electronic device executes the steps of the above-mentioned multi-point ground current synchronous low-power monitoring method.

[0066] Wherein, the processor can be a processor or a controller, for example, a central processing unit (CPU), a general processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the present disclosure. The processor can also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of DSP and microprocessors, and the like. The processor can be used to support electronic devices to execute the method steps provided in the above embodiments.

[0067] The bus may be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. The above bus may be divided into an address bus, a data bus, a control bus, etc.

[0068] An embodiment of the present application provides a computer-readable storage medium, in which a computer program is stored. When the computer program is executed by a processor, the steps of the above-mentioned multi-point ground current synchronous low-power monitoring method are implemented.

[0069] The computer-readable storage medium involved in the present application includes random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disks, removable disks, CD-ROMs, or any other form of storage medium known in the technical field.

[0070] For the description of the relevant parts of the multi-point ground current synchronous low-power monitoring system, electronic device and computer-readable storage medium provided in the embodiments of the present application, please refer to the detailed description of the corresponding parts in the multi-point ground current synchronous low-power monitoring method provided in the embodiments of the present application, which will not be repeated here. In addition, the parts of the above-mentioned technical solutions provided in the embodiments of the present application that are consistent with the implementation principles of the corresponding technical solutions in the prior art are not described in detail to avoid excessive elaboration.

[0071] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for synchronous low-power monitoring of multi-point grounding current, characterized in that: include: Collect the ground current data at each point, process the analog signal, and convert it into the corresponding digital signal; Collect digital signals and analyze whether the ground current data at each point exceeds the safety threshold; The time synchronization method for collecting ground current data at each point includes: Extract time information from real-time satellite signals as a time reference; The local clock when collecting the ground current data at each point is calibrated in real time by using the time reference; the real-time synchronization calibration is achieved by transmitting and calculating different timestamps carried in the message; Wherein, the analog signal processing comprises: After filtering the ground current data at each point, the amplification factor of the ground current data at each point is controlled so that the full deviation of the ground current data at each point within the corresponding range meets the preset requirements; and the amplitude of the ground current data at each point after filtering is within the preset range; Wherein, the method for transmitting the ground current data at each point includes: The transmission power during the transmission of ground current data at each point is inversely proportional to the communication quality.

2. According to claim 1, a multi-point ground current synchronous low-power monitoring method is characterized in that: The real-time synchronous calibration also includes: If the stability of the real-time satellite signal deviates from the preset range, or the real-time satellite signal is interrupted, the local clock when collecting the ground current data at each point is synchronized and calibrated through the precise time protocol timing strategy.

3. According to claim 2, a multi-point ground current synchronous low-power monitoring method is characterized in that: The real-time synchronous calibration is realized by transmitting and calculating different timestamps carried in messages, including: The end for collecting the ground current data of each point is taken as the collection side, and the end from which the ground current data of each point comes is taken as the terminal side; Calculating network latency : Calculate the clock offset value : in, Indicates the time when the first message is sent by the collection side. Indicates the time when the terminal side receives the first message, Indicates the time when the terminal sends the second message. Indicates the time when the collection side receives the second message. ; According to network delay and clock offset value Realize real-time synchronous calibration.

4. A method for synchronous low-power monitoring of multi-point grounding current according to claim 3, characterized in that: According to the network delay and clock offset value When achieving real-time synchronous calibration, it also includes: Record the clock offset values ​​of two consecutive times ; According to the clock offset values ​​of two adjacent , calculate the deviation between the actual clock frequency and the corresponding theoretical value; Clock compensation is performed in the next timely cycle based on the deviation between the actual clock frequency and the corresponding theoretical value.

5. A method for synchronous low-power monitoring of multi-point ground current according to claim 4, characterized in that: The time synchronization method for collecting ground current data at each point also includes: The current time when the record is collected ; Calculate the time offset after the acquisition is completed , calculate and synchronize the exact synchronization time .

6. A method for synchronous low-power monitoring of multi-point ground current according to claim 5, characterized in that: The analog signal processing further includes: The control makes the phase of the ground current data at each point after filtering consistent with the phase of the signal of the source of the ground current data at each point.

7. A method for synchronous low-power monitoring of multi-point ground current according to claim 6, characterized in that: The collecting of ground current data at each point also includes: Send a wake-up code to the terminal side corresponding to the ground current data of each point respectively, and after receiving a reply from the terminal side, start collecting the corresponding ground current data; The conversion into a corresponding digital signal also includes: When a wake-up code is received, a pulse signal is sent out at the same time to perform the conversion process.

8. A multi-point ground current synchronous low-power monitoring system, characterized in that: include: The acquisition and conversion module is used to collect the ground current data of each point, process the analog signal, and convert it into the corresponding digital signal; A collection and analysis module is used to collect digital signals and analyze whether the ground current data at each point exceeds the safety threshold; The time synchronization method for collecting ground current data at each point includes: Extract time information from real-time satellite signals as a time reference; The local clock when collecting the ground current data at each point is calibrated in real time by using the time reference; the real-time synchronization calibration is achieved by transmitting and calculating different timestamps carried in the message; Wherein, the analog signal processing comprises: After filtering the ground current data at each point, the amplification factor of the ground current data at each point is controlled so that the full deviation of the ground current data at each point within the corresponding range meets the preset requirements; and the amplitude of the ground current data at each point after filtering is within the preset range; Wherein, the method for transmitting the ground current data at each point includes: The transmission power during the transmission of ground current data at each point is inversely proportional to the communication quality.

9. An electronic device, characterized in that: include: A memory and one or more processors; the memory is coupled to the processor; wherein the memory stores computer program code, the computer program code includes computer instructions, and when the computer instructions are executed by the processor, the electronic device executes the steps of the multi-point ground current synchronous low-power monitoring method as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the multi-point ground current synchronous low-power monitoring method according to any one of claims 1 to 7 are implemented.

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