Grounding line virtual hanging state monitoring and early warning method, system, device and medium

Abstract

The present application relates to a kind of ground wire virtual hanging state monitoring early warning method, system, equipment and medium, the method includes obtaining the clamp of ground wire clamp and clamp on trigger signal, with its corresponding time as the starting time of sampling window, in the sampling window Synchronous acquisition surface impedance sample value, induced electric field intensity and impedance response time delay;According to the interference peeling of induced electric field intensity on surface impedance sample value, obtain field interference correction impedance value;According to impedance response time delay on field interference correction impedance value screening credible reading interval, and extract effective impedance characteristic quantity in credible reading interval;Based on effective impedance characteristic quantity and preset virtual hanging impedance reference, calculate virtual hanging deviation degree, and when virtual hanging deviation degree meets preset verification condition, collect clamping force duration, according to clamping force duration verification whether virtual hanging deviation degree continuously meets preset verification condition, obtain hanging effectiveness determination result, and early warning is carried out accordingly.The present application has the effect of improving the reliability of early warning.

Description

Technical Field

[0001] This invention belongs to the technical field of power maintenance safety monitoring, and in particular relates to a method, system, equipment and medium for monitoring and early warning of grounding wire malfunction. Background Technology

[0002] Currently, grounding wires are crucial safety tools for preventing sudden power surges during power system maintenance. The quality of grounding wire connection directly affects the effectiveness of grounding protection. The electrical contact state between the grounding wire clamp and the conductor affects the grounding impedance. Under conditions such as induced electric fields, dynamic clamping, and changes in connection status at the maintenance site, the grounding wire connection status needs to be identifiable and verifiable.

[0003] The existing grounding wire connection management mainly relies on manual visual inspection and periodic resistance sampling. When judging the contact surface status during the dynamic connection process, it is easily affected by transient reading fluctuations, resulting in a high misjudgment rate of false connection status and low early warning reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a method, system, device and medium for monitoring and early warning of the virtual connection status of grounding wires, so as to solve the technical problem of low reliability of the dynamic connection status judgment in the existing grounding wire connection management.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a method for monitoring and early warning of grounding wire malfunction, the method comprising: The clamp closing trigger signal of the grounding clamp is obtained, and the time corresponding to the clamp closing trigger signal is taken as the start time of the sampling window. Within the sampling window, the surface impedance sampling value, induced electric field intensity and impedance response delay are obtained synchronously. Based on the induced electric field intensity, interference is stripped from the surface impedance sampling value to obtain the field interference corrected impedance value; The field interference correction impedance value is screened for a reliable reading range based on the impedance response delay, and effective impedance characteristic quantities are extracted within the reliable reading range. The virtual connection deviation is calculated based on the effective impedance characteristic and the preset virtual connection impedance benchmark. When the virtual connection deviation meets the preset verification conditions, the duration of the clamping force is collected. The virtual connection deviation is verified to see if it continues to meet the preset verification conditions based on the duration of the clamping force, and the connection validity determination result is obtained. An early warning is issued based on the connection validity determination result.

[0006] By adopting the above technical solution, by acquiring the clamp closing trigger signal and simultaneously acquiring the surface impedance sampling value, induced electric field strength, and impedance response delay as the start time of the sampling window, the impedance, electric field, and delay data can correspond to the same hanging action, thereby improving the time consistency of grounding clamp hanging status monitoring data. By filtering out interference from the surface impedance sampling value based on the induced electric field strength, the superposition effect of the induced electric field on the surface impedance reading can be weakened, thereby improving the authenticity of the clamp contact impedance judgment. By filtering the reliable reading range of the field interference correction impedance value based on the impedance response delay and extracting the effective impedance characteristic quantity, the transient impedance fluctuation reading at the moment of hanging can be eliminated, thereby improving the accuracy of the false hanging deviation judgment. By calculating the false hanging deviation degree based on the effective impedance characteristic quantity and the preset false hanging impedance benchmark, and verifying whether the false hanging deviation degree continuously meets the preset verification conditions in combination with the clamping force duration, the continuous false hanging deviation and transient contact fluctuation can be distinguished, thereby reducing the false hanging misjudgment rate and improving the reliability of early warning.

[0007] In one example, the present invention can be further configured as follows: the clamp closing trigger signal of the grounding clamp is obtained, and the time corresponding to the clamp closing trigger signal is taken as the start time of the sampling window. Within the sampling window, the surface impedance sampling value, the induced electric field intensity, and the impedance response delay are simultaneously obtained, including: The closing position of the grounding clamp is monitored in real time. When the upper and lower jaws of the grounding clamp close and reach the closing mechanical stroke, the clamp closing trigger signal is obtained. The sampling window is started at the moment when the clamp closes trigger signal, and the impedance of the clamp contact surface is continuously sampled to obtain the surface impedance sampling value. The induced electric field intensity in the fixture environment is collected within the sampling window, and the time length from the arrival of the fixture closing trigger signal to the stable reading of the surface impedance sampling value is recorded to obtain the impedance response delay.

[0008] By adopting the above technical solution, the closing status of the grounding clamp is monitored in real time, and a clamp closing trigger signal is obtained when the upper and lower jaws of the clamp are closed. This allows for accurate determination of the start time of the current connection test, thus avoiding time deviations between different collected data. By continuously sampling the contact surface impedance of the clamp using the arrival time of the clamp closing trigger signal as the start time of the sampling window, the surface impedance change during the dynamic connection process can be obtained, providing a continuous data basis for subsequent judgment of the clamp contact status. By collecting the induced electric field intensity and recording the impedance response delay within the sampling window, information on electric field interference factors and impedance stabilization process can be obtained simultaneously, thereby improving the targeting of subsequent impedance correction and reliable screening.

[0009] In one example, the present invention can be further configured as follows: the step of removing interference from the surface impedance sample value based on the induced electric field intensity to obtain a field interference corrected impedance value includes: The induced electric field intensity within the sampling window is obtained, and the induced electric field intensity is standardized by interval scaling according to the range of change of the induced electric field intensity within the sampling window to obtain the standardized result of the induced electric field intensity. The interference component in the surface impedance sample value is determined based on the standardized result of the induced electric field intensity. The surface impedance sample value is corrected using the interference component to obtain the field interference corrected impedance value.

[0010] By adopting the above technical solution, and by standardizing the range of induced electric field intensity variation within the sampling window, a standardized result reflecting the relative strength of the induced electric field can be obtained, thus facilitating a unified characterization of the degree of electric field interference at different sites. By determining the interference component in the surface impedance sampling value based on the standardized result of the induced electric field intensity, the superposition effect introduced by the induced electric field in the surface impedance reading can be identified, thereby improving the accuracy of the impedance correction basis. By using the interference component to correct the surface impedance sampling value, a field interference corrected impedance value can be obtained, thereby reducing the interference of the induced electric field on the result of the spurious hanging judgment.

[0011] In one example, the present invention can be further configured as follows: the step of filtering the field interference corrected impedance value based on the impedance response delay and extracting effective impedance characteristics within the reliable reading range includes: The lower limit of the stability window is determined based on the impedance response delay within the sampling window. Based on the lower limit of the stability window, the field interference correction impedance values ​​corresponding to the impedance response delays of each impedance are filtered to obtain the reliable reading range; The field interference correction impedance value is feature extracted within the reliable reading range to obtain the effective impedance feature quantity.

[0012] By adopting the above technical solution, and by determining the lower limit of the stable window based on the response delay of each impedance within the sampling window, a screening boundary can be formed to distinguish between transient and stable readings, thereby reducing the impact of impedance jitter in the initial stage of connection on the judgment result. By screening the field interference correction impedance values ​​corresponding to the response delay of each impedance based on the lower limit of the stable window, impedance readings that are closer to the stable contact state can be retained, thus obtaining a reliable reading range. By extracting features from the field interference correction impedance values ​​within the reliable reading range, effective impedance characteristic quantities can be obtained, thereby providing a stable and reliable impedance characteristic basis for calculating the virtual connection deviation.

[0013] In one example, the present invention can be further configured as follows: Based on the lower limit of the stability window, filtering the field interference correction impedance values ​​corresponding to each impedance response delay to obtain the reliable reading range includes: Extract the impedance response delays from the sampling window to form an impedance response delay sequence; The lower limit of the stability window is determined based on the impedance response delay sequence; The field interference correction impedance values ​​corresponding to impedance response delays lower than the lower limit of the stability window are excluded, while the field interference correction impedance values ​​corresponding to impedance response delays not lower than the lower limit of the stability window are retained to obtain the reliable reading range.

[0014] By adopting the above technical solution, and by extracting the impedance response delays from the sampling window and forming an impedance response delay sequence, the time distribution of impedance readings tending to stabilize during the connection process can be reflected, thus providing a data basis for determining the lower limit of the stability window. By determining the lower limit of the stability window based on the impedance response delay sequence, the boundary between transient readings and reliable readings can be adaptively determined, thereby improving the adaptability of reading selection under different connection conditions. By excluding field interference corrected impedance values ​​with impedance response delays lower than the lower limit of the stability window and retaining field interference corrected impedance values ​​not lower than the lower limit of the stability window, abnormal readings in the transient transition phase can be eliminated, thus obtaining a more reliable reliable reading range.

[0015] In one example, the present invention can be further configured as follows: The virtual connection deviation is calculated based on the effective impedance characteristic and a preset virtual connection impedance reference; when the virtual connection deviation meets a preset verification condition, the duration of the clamping force is collected; based on the duration of the clamping force, the virtual connection deviation is verified to ensure it continuously meets the preset verification condition, resulting in a connection validity determination result; and an early warning is issued based on the connection validity determination result, including: Obtain the preset virtual impedance reference, and compare the effective impedance characteristic with the preset virtual impedance reference to obtain the virtual deviation. Obtain a preset deviation range and compare the virtual hanging deviation with the preset deviation range to determine whether the virtual hanging deviation meets the preset verification condition; When the virtual attachment deviation meets the preset verification condition, the virtual attachment verification state is entered. In the virtual hanging verification state, the duration of the clamping force is collected, and the virtual hanging deviation is verified based on the duration of the clamping force to determine whether the virtual hanging deviation continuously meets the preset verification conditions, thereby obtaining the hanging validity determination result. An early warning will be issued based on the results of the connection validity determination.

[0016] By adopting the above technical solution, and by obtaining a preset virtual connection impedance benchmark and comparing the effective impedance characteristic with the preset virtual connection impedance benchmark, the virtual connection deviation degree, which characterizes the degree to which the current connection state deviates from the virtual connection benchmark, can be obtained, thus providing a quantitative basis for the preliminary identification of the virtual connection state. By obtaining a preset deviation range and comparing the virtual connection deviation degree with the preset deviation range, it is possible to determine whether the current virtual connection deviation degree meets the preset verification conditions, thereby avoiding unnecessary continuous verification of connection states that have not reached the verification range. By entering the virtual connection verification state when the virtual connection deviation degree meets the preset verification conditions, and by combining the clamping force duration to verify whether the virtual connection deviation degree continues to meet the preset verification conditions, it is possible to determine whether the virtual connection deviation is persistent, thereby improving the reliability of the connection validity determination result. By issuing an early warning based on the connection validity determination result, a prompt can be output in a timely manner when the connection is invalid, thereby improving the safety of the maintenance work site.

[0017] In one example, the present invention can be further configured as follows: During the virtual attachment verification state, the duration of the clamping force is collected, and the virtual attachment deviation is verified based on the duration of the clamping force to determine whether the virtual attachment deviation continuously meets the preset verification conditions, thereby obtaining the attachment validity determination result, including: From the moment the virtual connection verification state is triggered, the clamping force on the grounding clamp is continuously monitored to obtain the duration of the clamping force. The duration of the clamping force is used as a continuous time window, and the virtual hanging deviation is calculated by acquiring multiple corresponding sampling times within the continuous time window according to a preset sampling period. Determine whether the virtual attachment deviation at multiple corresponding sampling times all meet the preset verification conditions. When the virtual attachment deviation at multiple corresponding sampling times all meet the preset verification conditions, obtain the attachment validity determination result indicating invalidity. When there is a virtual attachment deviation that does not meet the preset verification condition among the virtual attachment deviations at multiple corresponding sampling times, a valid attachment validity determination result is obtained.

[0018] By adopting the above technical solution, the clamping force on the grounding clamp is continuously monitored from the moment the false connection verification state is triggered. This allows for the acquisition of the duration of the clamping force while the clamp is in the closed position, providing a time basis for continuous verification. By using the duration of the clamping force as a continuous time window and acquiring the false connection deviation calculated at multiple corresponding sampling moments within the continuous time window according to a preset sampling period, the continuous change of the false connection deviation during the continuous holding of the clamping force can be obtained, thus avoiding judgment based solely on a single deviation result. By determining whether the false connection deviation at multiple corresponding sampling moments meets the preset verification conditions, the distinction between continuous false connection deviation and transient fluctuations can be made, thereby improving the accuracy of connection validity determination. By obtaining a connection validity determination result indicating invalidity when multiple false connection deviations meet the preset verification conditions, and obtaining a connection validity determination result indicating validity when there are false connection deviations that do not meet the preset verification conditions, a clear valid or invalid determination output can be formed, thereby improving the stability and reliability of grounding wire false connection early warning.

[0019] In a second aspect, the present invention provides a grounding wire loose connection status monitoring and early warning system, the system comprising: The trigger acquisition module is used to acquire the clamp closing trigger signal of the grounding clamp, and take the time corresponding to the clamp closing trigger signal as the start time of the sampling window. Within the sampling window, the surface impedance sampling value, induced electric field intensity and impedance response delay are acquired synchronously. An interference stripping module is used to strip interference from the surface impedance sampling value based on the induced electric field intensity to obtain a field interference corrected impedance value. The time delay screening module is used to screen the field interference correction impedance value according to the impedance response time delay, and extract the effective impedance characteristic quantity within the reliable reading range; The verification and early warning module is used to calculate the virtual connection deviation based on the effective impedance characteristic and the preset virtual connection impedance benchmark, and when the virtual connection deviation meets the preset verification conditions, to collect the duration of the clamping force, to verify whether the virtual connection deviation continues to meet the preset verification conditions based on the duration of the clamping force, to obtain the connection validity determination result, and to issue an early warning based on the connection validity determination result.

[0020] By adopting the above technical solution, by acquiring the clamp closing trigger signal and simultaneously acquiring the surface impedance sampling value, induced electric field strength, and impedance response delay as the start time of the sampling window, the impedance, electric field, and delay data can correspond to the same hanging action, thereby improving the time consistency of grounding clamp hanging status monitoring data. By filtering out interference from the surface impedance sampling value based on the induced electric field strength, the superposition effect of the induced electric field on the surface impedance reading can be weakened, thereby improving the authenticity of the clamp contact impedance judgment. By filtering the reliable reading range of the field interference correction impedance value based on the impedance response delay and extracting the effective impedance characteristic quantity, the transient impedance fluctuation reading at the moment of hanging can be eliminated, thereby improving the accuracy of the false hanging deviation judgment. By calculating the false hanging deviation degree based on the effective impedance characteristic quantity and the preset false hanging impedance benchmark, and verifying whether the false hanging deviation degree continuously meets the preset verification conditions in combination with the clamping force duration, the continuous false hanging deviation and transient contact fluctuation can be distinguished, thereby reducing the false hanging misjudgment rate and improving the reliability of early warning.

[0021] In a third aspect, the present invention provides an electronic device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the grounding wire malfunction monitoring and early warning method.

[0022] In a fourth aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method for monitoring and early warning of a grounding wire malfunction. Attached Figure Description

[0023] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a flowchart of a grounding wire loose connection monitoring and early warning method in an embodiment of the present invention; Figure 2 This is a structural block diagram of the grounding wire malfunction monitoring and early warning system in an embodiment of the present invention; Figure 3 This is a structural block diagram of an electronic device according to an embodiment of the present invention. Detailed Implementation

[0024] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0025] The following detailed description is exemplary and intended to provide further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this invention is for describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention.

[0026] Example 1 like Figure 1 As shown, this invention discloses a method for monitoring and early warning of grounding wire malfunction, which specifically includes the following steps: S10: Obtain the clamp closing trigger signal of the grounding clamp, take the time corresponding to the clamp closing trigger signal as the start time of the sampling window, and synchronously obtain the surface impedance sampling value, induced electric field intensity and impedance response delay within the sampling window.

[0027] Specifically, taking a single grounding clamp connection action as the processing object, a sampling window corresponding to the connection action is established after the clamp closes and trigger signal appears. Within this sampling window, the surface impedance sampling value used to characterize the clamp contact state, the induced electric field strength used to characterize the degree of field induced interference, and the impedance response delay used to characterize the impedance reading transition from transient to stable reading are acquired simultaneously. This ensures that subsequent interference stripping, reliable reading screening, and false connection verification are all based on the data from the same connection process.

[0028] S20: Based on the induced electric field strength, interference is stripped from the surface impedance sampling value to obtain the field interference corrected impedance value.

[0029] Specifically, since the grounding wire may be affected by power frequency and harmonic induced electric fields at the connection site, the induced electric field will be coupled to the impedance sampling process of the clamp contact surface through the clamp metal. This causes the surface impedance sampling value to be superimposed with the interference component related to the intensity of the induced electric field on the basis of the real contact impedance. Therefore, the interference effect in the surface impedance sampling value is stripped according to the intensity of the induced electric field to obtain the field interference correction impedance value that is closer to the real contact state of the clamp.

[0030] S30: Based on the impedance response delay, the reliable reading range of the field interference correction impedance value is screened, and the effective impedance characteristic quantity is extracted within the reliable reading range.

[0031] Specifically, when the grounding clamp is just clamped, the impedance of the clamp contact surface will undergo a change process from transient to stable reading. The impedance response delay is used to reflect the time length corresponding to this change process. The impedance value of the field interference correction is screened by the impedance response delay to exclude the reading corresponding to the transient stage, and the effective impedance characteristic quantity that can characterize the stable contact state is extracted within the remaining reliable reading range.

[0032] S40: Calculate the virtual connection deviation based on the effective impedance characteristic and the preset virtual connection impedance benchmark. When the virtual connection deviation meets the preset verification conditions, collect the duration of the clamping force. Verify whether the virtual connection deviation continues to meet the preset verification conditions based on the duration of the clamping force, obtain the connection validity judgment result, and issue an early warning based on the connection validity judgment result.

[0033] Specifically, the deviation of the effective impedance characteristic quantity from the preset virtual connection impedance benchmark is used as the initial basis for judging virtual connection. When the virtual connection deviation meets the preset verification conditions, the current connection is not directly judged as invalid. Instead, the continuity of the virtual connection deviation is further verified by combining the duration of the clamping force, so as to distinguish between continuous virtual connection deviation and transient contact fluctuation, and the connection validity judgment result and corresponding warning output are generated accordingly.

[0034] In one embodiment, in step S10, i.e., obtaining the clamp closing trigger signal of the grounding clamp, the time corresponding to the clamp closing trigger signal is taken as the start time of the sampling window, and the surface impedance sampling value, induced electric field intensity, and impedance response delay are synchronously obtained within the sampling window, including: S11: Real-time monitoring of the closing position of the grounding clamp. When the upper and lower jaws of the grounding clamp close and reach the closing mechanical stroke, a clamp closing trigger signal is obtained.

[0035] Specifically, the closing position sensor installed on the grounding clamp monitors the closing status of the upper and lower jaws of the clamp in real time. When the upper and lower jaws of the clamp close and reach the preset closing position mechanical stroke, the closing position sensor outputs a level transition signal. This level transition signal serves as the clamp closing trigger signal. The clamp closing trigger signal is used to calibrate the common starting time of contact surface impedance sampling, induced electric field intensity acquisition, and impedance response delay timing during this connection process.

[0036] S12: Using the arrival time of the clamp closing trigger signal as the start time of the sampling window, continuously sample the impedance of the clamp contact surface to obtain the surface impedance sampling value.

[0037] Specifically, after the clamp closing trigger signal arrives, the arrival time is taken as the start time of the sampling window. The contact surface impedance sampling circuit set inside the grounding clamp jaws continuously samples the contact surface impedance of the jaws. At each sampling time within the sampling window, the corresponding surface impedance sampling value is output. The surface impedance sampling value is used to reflect the electrical contact state between the jaw contact surface and the conductor. The more stable the jaw contact, the better the surface impedance sampling value can characterize the actual contact impedance state.

[0038] S13: Collect the induced electric field intensity in the fixture environment within the sampling window, and record the time length from the arrival of the fixture closing trigger signal to the stable reading of the surface impedance sampling value, thus obtaining the impedance response delay.

[0039] Specifically, within the sampling window, an electric field sensor located at the top of the fixture collects data about the environment around the fixture and outputs the induced electric field strength. Simultaneously, an impedance response delay timer starts timing from the moment the fixture closes to trigger the signal and records the time length corresponding to the transient transition of the surface impedance sample value to a stable reading. This time length is used as the impedance response delay. The induced electric field strength is used for subsequent interference removal of the surface impedance sample value, and the impedance response delay is used for subsequent filtering of impedance readings in the transient phase.

[0040] In one embodiment, step S20, namely, performing interference stripping on the surface impedance sampling value based on the induced electric field intensity to obtain the field interference corrected impedance value, includes: S21: Obtain the induced electric field intensity within the sampling window, and perform interval scaling and standardization on the induced electric field intensity according to the range of variation of the induced electric field intensity within the sampling window to obtain the standardized result of the induced electric field intensity.

[0041] Specifically, the induced electric field intensity at each sampling time within the sampling window is obtained, and the minimum and maximum values ​​of the induced electric field intensity are determined from the sampling window, according to the formula e′=E EminEmax Emin performs interval scaling normalization on the induced electric field intensity, where E is the induced electric field intensity, Emin is the minimum induced electric field intensity within the sampling window, Emax is the maximum induced electric field intensity within the sampling window, and e′ is the normalized result of the induced electric field intensity. The normalized result of the induced electric field intensity is used to characterize the relative strength of the current induced electric field intensity within the sampling window.

[0042] S22: Determine the interference component in the surface impedance sampling value based on the result after standardization of the induced electric field strength.

[0043] Specifically, when the grounding clamp is in the instant of closing or in the initial stage of connection, the field power frequency and harmonic induced electric field will be coupled to the contact surface impedance sampling circuit through the clamp metal. This will cause interference components positively correlated with the induced electric field strength to be superimposed on the surface impedance sampling value. The larger the result of the induced electric field strength after standardization, the stronger the induced electric field interference at the current sampling moment, and the larger the interference component that needs to be removed from the surface impedance sampling value. The smaller the result of the induced electric field strength after standardization, the weaker the induced electric field interference at the current sampling moment, and the smaller the interference component that needs to be removed.

[0044] S23: Correct the surface impedance sampling value using the interference component to obtain the field interference corrected impedance value.

[0045] Specifically, interference is removed from the surface impedance sampling value using the standardized result of the induced electric field strength, and then according to the formula Z... = Z·(1 e′) Calculate the field interference corrected impedance value, where Z is the surface impedance sample value, and e′ is the normalized result of the induced electric field intensity, Z The field interference correction impedance value is determined by the following: when the induced electric field strength is greater, the interference component stripped from the surface impedance sampling value is greater; when the induced electric field strength is smaller, the field interference correction impedance value is closer to the surface impedance sampling value.

[0046] In one embodiment, step S30, namely, screening the reliable reading range of the field interference correction impedance value based on the impedance response delay, and extracting effective impedance characteristic quantities within the reliable reading range, includes: S31: Determine the lower limit of the stability window based on the response delay of each impedance within the sampling window.

[0047] Specifically, within the sampling window, the impedance response delay corresponding to each sampling moment is used as the basis for judging whether the field interference correction impedance value is in the stable reading stage. Readings with shorter impedance response delays are more likely to correspond to the transient transition stage after the clamp has just closed, while readings with longer impedance response delays or those that have reached the stable stage can better reflect the impedance state after the clamp contact surface has stabilized. Therefore, the lower limit of the stable window is determined based on the impedance response delays within the sampling window, and the lower limit of the stable window is used as the time boundary to distinguish between transient readings and reliable readings.

[0048] S32: Based on the lower limit of the stability window, the field interference correction impedance values ​​corresponding to the response delay of each impedance are screened to obtain a reliable reading range.

[0049] Specifically, the field interference correction impedance value is correlated with the corresponding impedance response delay. When the impedance response delay is lower than the lower limit of the stability window, it is considered that the field interference correction impedance value may still be affected by contact jitter at the moment of connection. When the impedance response delay is not lower than the lower limit of the stability window, it is considered that the field interference correction impedance value is closer to the stable reading stage. The field interference correction impedance value that meets the stable reading requirements is retained to form a reliable reading range.

[0050] S33: Extract features from the field interference correction impedance value within the reliable reading range to obtain the effective impedance feature quantity.

[0051] Specifically, within the reliable reading range, the retained field interference correction impedance values ​​are feature extracted to obtain an effective impedance characteristic quantity that can characterize the stable contact state. In one implementation, the arithmetic mean of the field interference correction impedance values ​​within the reliable reading range can be taken, and this arithmetic mean can be used as the effective impedance characteristic quantity. The effective impedance characteristic quantity is used for subsequent comparison and calculation with a preset virtual impedance reference.

[0052] In one embodiment, in step S32, based on the lower limit of the stability window, the field disturbance correction impedance values ​​corresponding to the response delay of each impedance are screened to obtain a reliable reading range, including: S321: Extract the impedance response delay from the sampling window to form an impedance response delay sequence.

[0053] Specifically, the impedance response delay corresponding to each sampling moment is extracted from the sampling window, and the impedance response delays are arranged according to the order of sampling moments or the recording order in the sampling window to form an impedance response delay sequence. The impedance response delay sequence is used to characterize the time distribution of the surface impedance reading from transient change to stable reading during this connection process.

[0054] S322: Determine the lower limit of the stability window based on the impedance response delay sequence.

[0055] Specifically, the lower limit of the stability window is determined based on the distribution of each impedance response delay in the impedance response delay sequence. In one implementation, the median value of the impedance response delay sequence is taken as the lower limit of the stability window. The median value can reflect the concentration level of the impedance response delay within the current sampling window without relying on a fixed time threshold, and can be used as the time boundary for filtering out transient readings.

[0056] S323: Exclude the field interference correction impedance values ​​corresponding to impedance response delays lower than the lower limit of the stability window, and retain the field interference correction impedance values ​​corresponding to impedance response delays not lower than the lower limit of the stability window to obtain a reliable reading range.

[0057] Specifically, the impedance response delay corresponding to each field interference correction impedance value within the sampling window is compared. When the impedance response delay is lower than the lower limit of the stability window, the corresponding field interference correction impedance value is excluded from subsequent calculations. When the impedance response delay is not lower than the lower limit of the stability window, the corresponding field interference correction impedance value is retained. The retained field interference correction impedance values ​​constitute a reliable reading range, which is used for the subsequent extraction of effective impedance characteristics.

[0058] In one embodiment, in step S40, the virtual connection deviation is calculated based on the effective impedance characteristic and a preset virtual connection impedance reference. When the virtual connection deviation meets a preset verification condition, the duration of the clamping force is collected. Based on the duration of the clamping force, the validity of the virtual connection deviation is verified to ensure it continues to meet the preset verification condition, resulting in a connection validity determination result. An early warning is then issued based on the connection validity determination result, including: S41: Obtain the preset virtual impedance reference, and compare the effective impedance characteristic with the preset virtual impedance reference to obtain the virtual deviation.

[0059] Specifically, the preset virtual impedance reference is a reference impedance value obtained by calibrating and measuring the impedance of the clamp contact surface and then removing induced electric field interference. After obtaining the preset virtual impedance reference, the effective impedance characteristic quantity is compared with the preset virtual impedance reference, and the result is calculated according to the formula D = (F B) / B calculates the virtual connection deviation, where F is the effective impedance characteristic, B is the preset virtual connection impedance reference, and D is the virtual connection deviation. The virtual connection deviation is used to characterize the degree of deviation of the current stable contact impedance characteristic from the virtual connection impedance reference.

[0060] S42: Obtain the preset deviation range and compare the virtual hanging deviation with the preset deviation range to determine whether the virtual hanging deviation meets the preset verification conditions.

[0061] Specifically, the preset deviation interval can be formed during the equipment initialization phase. During the equipment initialization phase, effective impedance characteristics are collected for a set of normally connected samples and a set of dummy connected samples, and the corresponding dummy connection deviation is calculated. The minimum and maximum values ​​of the dummy connection deviation corresponding to the dummy connected samples are statistically analyzed, and a preset deviation interval is formed based on the minimum and maximum values ​​of the dummy connection deviation corresponding to the dummy connected samples. The currently calculated dummy connection deviation is compared with the preset deviation interval. When the dummy connection deviation falls within the preset deviation interval, it is determined that the dummy connection deviation meets the preset verification condition. When the dummy connection deviation does not fall within the preset deviation interval, it is determined that the dummy connection deviation does not meet the preset verification condition.

[0062] S43: Enter the virtual attachment verification state when the virtual attachment deviation meets the preset verification conditions.

[0063] Specifically, when the virtual connection deviation meets the preset verification conditions, it means that the deviation of the current effective impedance characteristic quantity from the preset virtual connection impedance benchmark has reached the range that requires further verification. At this time, the virtual connection verification state is entered, and the current virtual connection deviation is used as the initial basis for subsequent continuous verification. When the virtual connection deviation does not meet the preset verification conditions, it means that the current deviation has not reached the virtual connection verification trigger range, and the virtual connection verification state is not entered.

[0064] S44: In the virtual hanging verification state, the duration of clamping force is collected, and the virtual hanging deviation is verified based on the duration of clamping force to determine whether the virtual hanging deviation continuously meets the preset verification conditions, and the hanging validity judgment result is obtained.

[0065] Specifically, after entering the virtual connection verification state, the clamping force duration of the grounding clamp is collected. The clamping force duration refers to the cumulative time from the moment the virtual connection verification state is triggered, during which the clamping force on the grounding clamp is maintained in the closed position without loosening. The clamping force duration is used as the time basis for continuous verification. During the period covered by the clamping force duration, it is determined whether the virtual connection deviation continuously meets the preset verification conditions, thereby obtaining the connection validity judgment result.

[0066] S45: Issue an early warning based on the results of the connection validity assessment.

[0067] Specifically, when the connection validity determination result indicates that the current connection is invalid, the current connection is determined to be in a virtual connection state and an audible and visual alarm is triggered to remind maintenance personnel to handle the connection status of the grounding clamp. When the connection validity determination result indicates that the current connection is valid, the current connection is determined to be valid and no alarm is triggered. The warning output is consistent with the connection validity determination result.

[0068] In one embodiment, in step S44, i.e., during the spurious attachment verification state, the duration of the clamping force is collected, and the spurious attachment deviation is verified based on the duration of the clamping force to determine whether the spurious attachment deviation continuously meets the preset verification conditions, thereby obtaining the attachment validity determination result, including: S441: From the moment the virtual connection verification state is triggered, the clamping force on the grounding clamp is continuously monitored to obtain the duration of the clamping force.

[0069] Specifically, starting from the moment the virtual connection verification state is triggered, the output of the clamping force sensor on the grounding clamp is continuously monitored. When the clamp remains in the closed position and does not become loose, the holding process is continuously timed to accumulate the clamping force duration. The clamping force duration is used to determine the time range covered by subsequent continuous verification.

[0070] S442: The duration of the clamping force is used as the length of the continuous time window, and the virtual deviation is calculated by acquiring multiple corresponding sampling times within the continuous time window according to the preset sampling period.

[0071] Specifically, the duration of the clamping force is used as a continuous time window. Within the continuous time window, the processes of surface impedance sampling, induced electric field intensity acquisition, field interference correction impedance value generation, reliable reading interval screening, effective impedance characteristic quantity extraction, and virtual hanging deviation calculation are repeatedly performed according to a preset sampling period. This yields the virtual hanging deviation calculated at multiple corresponding sampling times within the continuous time window. These multiple virtual hanging deviations are used to characterize the continuous change of virtual hanging deviation during the continuous holding of the clamping force.

[0072] S443: Determine whether the virtual attachment deviation at multiple corresponding sampling times meets the preset verification conditions. When the virtual attachment deviation at multiple corresponding sampling times meets the preset verification conditions, obtain the invalid attachment validity determination result.

[0073] Specifically, the virtual attachment deviation calculated at multiple corresponding sampling times within a continuous time window is judged one by one. When the virtual attachment deviation at multiple corresponding sampling times meets the preset verification conditions, it indicates that the current deviation is not caused by a single sampling or transient fluctuation, but exists continuously during the continuous holding force. The interval assignment judgment result is taken as the continuous assignment, and the deviation stability evaluation quantity is generated as the stable deviation. The current attachment is judged as a virtual attachment state, and the attachment validity judgment result representing invalid attachment is obtained.

[0074] S444: When there is a false attachment deviation that does not meet the preset verification conditions among the false attachment deviations at multiple corresponding sampling times, a valid attachment validity determination result is obtained.

[0075] Specifically, the virtual attachment deviation calculated at multiple corresponding sampling times within a continuous time window is judged one by one. When there is a virtual attachment deviation that does not meet the preset verification conditions among the virtual attachment deviations at multiple corresponding sampling times, it indicates that the current deviation has not been maintained during the clamping force. The interval assignment judgment result is taken as the instantaneous assignment, and the deviation stability evaluation quantity is generated as transient fluctuation. The current attachment is judged as a valid attachment, and the effective attachment judgment result is obtained.

[0076] Example 2 like Figure 2 As shown, based on the same inventive concept as the above embodiments, the present invention also provides a grounding wire loose connection status monitoring and early warning system, including: The trigger acquisition module is used to acquire the clamp closing trigger signal of the grounding clamp. The time corresponding to the clamp closing trigger signal is the start time of the sampling window. Within the sampling window, the surface impedance sampling value, induced electric field intensity and impedance response delay are acquired synchronously. The interference stripping module is used to strip interference from the surface impedance sampling value based on the induced electric field intensity, and obtain the field interference corrected impedance value. The time delay screening module is used to screen the reliable reading range of the field interference correction impedance value based on the impedance response time delay, and extract the effective impedance characteristic quantity within the reliable reading range; The verification and early warning module is used to calculate the virtual connection deviation based on the effective impedance characteristic and the preset virtual connection impedance benchmark. When the virtual connection deviation meets the preset verification conditions, it collects the duration of the clamping force. Based on the duration of the clamping force, it verifies whether the virtual connection deviation continues to meet the preset verification conditions, obtains the connection validity judgment result, and issues an early warning based on the connection validity judgment result.

[0077] Optionally, the triggering acceptance module includes: The closing monitoring submodule is used to monitor the closing position of the grounding clamp in real time. When the upper and lower jaws of the grounding clamp close and reach the closing mechanical stroke, a clamp closing trigger signal is obtained. The impedance sampling submodule is used to continuously sample the impedance of the clamp contact surface, with the arrival time of the clamp closing trigger signal as the start time of the sampling window, to obtain the surface impedance sampling value. The electric field timing submodule is used to acquire the induced electric field intensity in the fixture environment within the sampling window, and record the time length from the arrival of the fixture closing trigger signal to the stable reading of the surface impedance sampling value, thus obtaining the impedance response delay.

[0078] Optionally, the interference stripping module includes: The electric field standard submodule is used to obtain the induced electric field intensity within the sampling window, and to perform interval scaling and standardization on the induced electric field intensity according to the range of variation of the induced electric field intensity within the sampling window, so as to obtain the standardized result of the induced electric field intensity. The interference determination submodule is used to determine the interference component in the surface impedance sample value based on the standardized result of the induced electric field strength. The impedance correction submodule is used to correct the surface impedance sampling value using the interference component to obtain the field interference corrected impedance value.

[0079] Optionally, the time delay screening module includes: The lower limit determination submodule is used to determine the lower limit of the stability window based on the response delay of each impedance within the sampling window; The interval filtering submodule is used to filter the field disturbance corrected impedance values ​​corresponding to the response delay of each impedance based on the lower limit of the stability window, so as to obtain a reliable reading interval. The feature extraction submodule is used to extract features from the field interference corrected impedance value within the reliable reading range to obtain the effective impedance feature quantity.

[0080] Optional, the interval filtering submodule includes: The time delay extraction unit is used to extract the time delay of each impedance response from the sampling window and form an impedance response time delay sequence. The lower limit determination unit is used to determine the lower limit of the stability window based on the impedance response time delay sequence. The reading retention unit is used to exclude the corresponding field interference corrected impedance value whose impedance response delay is lower than the lower limit of the stability window, and retain the corresponding field interference corrected impedance value whose impedance response delay is not lower than the lower limit of the stability window, so as to obtain a reliable reading range.

[0081] Optionally, the verification and early warning module includes: The deviation calculation submodule is used to obtain the preset virtual impedance reference and compare the effective impedance characteristic with the preset virtual impedance reference to obtain the virtual deviation degree. The condition judgment submodule is used to obtain the preset deviation range and compare the virtual hanging deviation with the preset deviation range to determine whether the virtual hanging deviation meets the preset verification conditions. The status triggering submodule is used to enter the virtual attachment verification state when the virtual attachment deviation meets the preset verification conditions. The continuous verification submodule is used to collect the duration of clamping force in the virtual hanging verification state, and to verify whether the virtual hanging deviation continuously meets the preset verification conditions based on the duration of clamping force, so as to obtain the hanging validity judgment result. The result warning submodule is used to issue warnings based on the results of the connection validity determination.

[0082] Optional, the continuous verification submodule includes: The clamping force monitoring unit is used to continuously monitor the clamping force on the grounding clamp from the moment the virtual connection verification state is triggered, and to obtain the duration of the clamping force. The window sampling unit is used to take the duration of the clamping force as a continuous time window, and to obtain the virtual hanging deviation calculated at multiple corresponding sampling times within the continuous time window according to a preset sampling period. The invalidity determination unit is used to determine whether the virtual attachment deviation at multiple corresponding sampling times meets the preset verification conditions. When the virtual attachment deviation at multiple corresponding sampling times meets the preset verification conditions, the invalid attachment validity determination result is obtained. The effective determination unit is used to obtain a determination result representing the effective connection when there is a false connection deviation that does not meet the preset verification conditions among the false connection deviations at multiple corresponding sampling times.

[0083] Example 3 like Figure 3 As shown, the present invention also provides an electronic device 100 for implementing a method for monitoring and early warning of grounding wire malfunction; The electronic device 100 includes a memory 101, at least one processor 102, a computer program 103 stored in the memory 101 and executable on at least one processor 102, and at least one communication bus 104.

[0084] The memory 101 can be used to store the computer program 103. The processor 102 implements the steps of the grounding wire malfunction monitoring and early warning method of Embodiment 1 by running or executing the computer program stored in the memory 101 and calling the data stored in the memory 101.

[0085] The memory 101 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created based on the use of the electronic device 100 (such as audio data), etc. In addition, the memory 101 may include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0086] At least one processor 102 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. Processor 102 may be a microprocessor or any conventional processor. Processor 102 is the control center of electronic device 100, connecting various parts of electronic device 100 via various interfaces and lines.

[0087] The memory 101 in the electronic device 100 stores multiple instructions to implement a grounding wire loose connection status monitoring and early warning method, and the processor 102 can execute multiple instructions to achieve the following: The grounding clamp is triggered by closing the clamp. The time corresponding to the clamp closing trigger signal is taken as the start time of the sampling window. Within the sampling window, the surface impedance sampling value, induced electric field intensity and impedance response delay are acquired synchronously. The interference-corrected impedance value is obtained by removing interference from the surface impedance sampling value based on the induced electric field intensity. Based on the impedance response delay, the field interference correction impedance value is screened for a reliable reading range, and effective impedance characteristic quantities are extracted within the reliable reading range. The virtual connection deviation is calculated based on the effective impedance characteristic and the preset virtual connection impedance benchmark. When the virtual connection deviation meets the preset verification conditions, the duration of the clamping force is collected. The virtual connection deviation is verified based on the duration of the clamping force to determine whether the virtual connection deviation continues to meet the preset verification conditions. The connection validity judgment result is obtained, and an early warning is issued based on the connection validity judgment result.

[0088] Example 4 If the modules / units integrated in the electronic device 100 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or system capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, and read-only memory (ROM).

[0089] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1One or more processes and / or boxes Figure 1 A system that specifies functions in one or more boxes.

[0091] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including an instruction set implemented in a process. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0092] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0093] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0094] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A method for monitoring and early warning of grounding wire malfunction, characterized in that, The method includes: The clamp closing trigger signal of the grounding clamp is obtained, and the time corresponding to the clamp closing trigger signal is taken as the start time of the sampling window. Within the sampling window, the surface impedance sampling value, induced electric field intensity and impedance response delay are obtained synchronously. Based on the induced electric field intensity, interference is stripped from the surface impedance sampling value to obtain the field interference corrected impedance value; The field interference correction impedance value is screened for a reliable reading range based on the impedance response delay, and effective impedance characteristic quantities are extracted within the reliable reading range. The virtual connection deviation is calculated based on the effective impedance characteristic and the preset virtual connection impedance benchmark. When the virtual connection deviation meets the preset verification conditions, the duration of the clamping force is collected. The virtual connection deviation is verified to see if it continues to meet the preset verification conditions based on the duration of the clamping force, and the connection validity determination result is obtained. An early warning is issued based on the connection validity determination result.

2. The method for monitoring and early warning of grounding wire malfunction as described in claim 1, characterized in that, The step of acquiring the clamp closing trigger signal of the grounding clamp, taking the time corresponding to the clamp closing trigger signal as the start time of the sampling window, and synchronously acquiring the surface impedance sampling value, induced electric field intensity, and impedance response delay within the sampling window, includes: The closing position of the grounding clamp is monitored in real time. When the upper and lower jaws of the grounding clamp close and reach the closing mechanical stroke, the clamp closing trigger signal is obtained. The sampling window is started at the moment when the clamp closes trigger signal, and the impedance of the clamp contact surface is continuously sampled to obtain the surface impedance sampling value. The induced electric field intensity in the fixture environment is collected within the sampling window, and the time length from the arrival of the fixture closing trigger signal to the stable reading of the surface impedance sampling value is recorded to obtain the impedance response delay.

3. The method for monitoring and early warning of grounding wire malfunction according to claim 1, characterized in that, The step of removing interference from the surface impedance sample value based on the induced electric field intensity to obtain the field interference corrected impedance value includes: The induced electric field intensity within the sampling window is obtained, and the induced electric field intensity is standardized by interval scaling according to the range of change of the induced electric field intensity within the sampling window to obtain the standardized result of the induced electric field intensity. The interference component in the surface impedance sample value is determined based on the standardized result of the induced electric field intensity. The surface impedance sample value is corrected using the interference component to obtain the field interference corrected impedance value.

4. The method for monitoring and early warning of grounding wire malfunction according to claim 1, characterized in that, The step of filtering the reliable reading range of the field interference corrected impedance value based on the impedance response delay, and extracting effective impedance characteristic quantities within the reliable reading range, includes: The lower limit of the stability window is determined based on the impedance response delay within the sampling window. Based on the lower limit of the stability window, the field interference correction impedance values ​​corresponding to the impedance response delays of each impedance are filtered to obtain the reliable reading range; The field interference correction impedance value is feature extracted within the reliable reading range to obtain the effective impedance feature quantity.

5. The method for monitoring and early warning of grounding wire malfunction according to claim 4, characterized in that, The process of filtering the field disturbance correction impedance values ​​corresponding to each impedance response delay based on the lower limit of the stability window to obtain the reliable reading range includes: Extract the impedance response delays from the sampling window to form an impedance response delay sequence; The lower limit of the stability window is determined based on the impedance response delay sequence; The field interference correction impedance values ​​corresponding to impedance response delays lower than the lower limit of the stability window are excluded, while the field interference correction impedance values ​​corresponding to impedance response delays not lower than the lower limit of the stability window are retained to obtain the reliable reading range.

6. The method for monitoring and early warning of grounding wire malfunction as described in claim 1, characterized in that, The virtual connection deviation is calculated based on the effective impedance characteristic and a preset virtual connection impedance benchmark. When the virtual connection deviation meets the preset verification conditions, the duration of the clamping force is collected. Based on the duration of the clamping force, the virtual connection deviation is verified to ensure that the preset verification conditions are met continuously, thereby obtaining a connection validity determination result. An early warning is then issued based on the connection validity determination result, including: Obtain the preset virtual impedance reference, and compare the effective impedance characteristic with the preset virtual impedance reference to obtain the virtual deviation. Obtain a preset deviation range and compare the virtual hanging deviation with the preset deviation range to determine whether the virtual hanging deviation meets the preset verification condition; When the virtual attachment deviation meets the preset verification condition, the virtual attachment verification state is entered. In the virtual hanging verification state, the duration of the clamping force is collected, and the virtual hanging deviation is verified based on the duration of the clamping force to determine whether the virtual hanging deviation continuously meets the preset verification conditions, thereby obtaining the hanging validity determination result. An early warning will be issued based on the results of the connection validity determination.

7. The method for monitoring and early warning of grounding wire malfunction according to claim 6, characterized in that, The process involves collecting the duration of the clamping force during the virtual attachment verification state, and verifying whether the virtual attachment deviation continuously meets the preset verification conditions based on the duration of the clamping force, thereby obtaining the attachment validity determination result, including: From the moment the virtual connection verification state is triggered, the clamping force on the grounding clamp is continuously monitored to obtain the duration of the clamping force. The duration of the clamping force is used as a continuous time window, and the virtual hanging deviation is calculated by acquiring multiple corresponding sampling times within the continuous time window according to a preset sampling period. Determine whether the virtual attachment deviation at multiple corresponding sampling times all meet the preset verification conditions. When the virtual attachment deviation at multiple corresponding sampling times all meet the preset verification conditions, obtain the attachment validity determination result indicating invalidity. When there is a virtual attachment deviation that does not meet the preset verification condition among the virtual attachment deviations at multiple corresponding sampling times, a valid attachment validity determination result is obtained.

8. A grounding wire loose connection status monitoring and early warning system, characterized in that, The system includes: The trigger acquisition module is used to acquire the clamp closing trigger signal of the grounding clamp, and take the time corresponding to the clamp closing trigger signal as the start time of the sampling window. Within the sampling window, the surface impedance sampling value, induced electric field intensity and impedance response delay are acquired synchronously. An interference stripping module is used to strip interference from the surface impedance sampling value based on the induced electric field intensity to obtain a field interference corrected impedance value. The time delay screening module is used to screen the field interference correction impedance value according to the impedance response time delay, and extract the effective impedance characteristic quantity within the reliable reading range; The verification and early warning module is used to calculate the virtual connection deviation based on the effective impedance characteristic and the preset virtual connection impedance benchmark, and when the virtual connection deviation meets the preset verification conditions, to collect the duration of the clamping force, to verify whether the virtual connection deviation continues to meet the preset verification conditions based on the duration of the clamping force, to obtain the connection validity determination result, and to issue an early warning based on the connection validity determination result.

9. An electronic device, characterized in that, It includes a processor and a memory, the processor being used to execute a computer program stored in the memory to implement the grounding wire malfunction monitoring and early warning 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 at least one instruction, which, when executed by a processor, implements the grounding wire loose connection monitoring and early warning method as described in any one of claims 1 to 7.

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