Method, device and equipment for detecting damage of inner ground wire of suspension clamp and storage medium

Abstract

The present application discloses a method, device and equipment for detecting damage of an inner ground wire of a suspension clamp and a storage medium, and belongs to the field of ground wire damage detection. The method comprises the following steps: determining sample normal ground wire data and sample damaged ground wire data based on sample normal ground wire sections and sample damaged ground wire sections; obtaining sample single-strand normal impedance and sample single-strand damaged impedance based on a preset ground wire impedance algorithm and the sample normal and damaged ground wire data; constructing ground wire state judgment relationship data based on the sample single-strand normal impedance and the sample single-strand damaged impedance; determining a reference ground wire section and a to-be-judged ground wire section based on a to-be-detected ground wire; obtaining a to-be-judged single-strand impedance set of the to-be-judged ground wire section and a reference single-strand ground wire impedance of the reference ground wire section; and determining a damage detection result based on the ground wire state judgment relationship data, the to-be-judged single-strand impedance set and the reference single-strand ground wire impedance. The reliability of damage detection of the inner ground wire of the suspension clamp is improved.

Description

Technical Field

[0001] This invention relates to the field of conductor and ground wire damage detection, and more particularly to a method, apparatus, equipment, and storage medium for detecting conductor and ground wire damage within a suspension clamp. Background Technology

[0002] Overhead transmission lines, serving as the backbone and framework of power systems, are widely used in high-voltage and ultra-high-voltage long-distance transmission systems due to their advantages such as high economic efficiency, large transmission capacity, strong environmental adaptability, and ease of installation and expansion. Currently, various technologies exist for detecting damage to conductors and ground wires in overhead transmission lines. Among these, existing technologies addressing the hidden defect of broken strands in conductors and ground wires within suspension clamps mainly include online electrical monitoring, ultrasonic guided wave detection, and UAV-mounted X-ray imaging. Online electrical monitoring involves installing sensors on the conductors, ground wires, or clamps to continuously monitor changes in parameters such as resistance and electromagnetic properties; ultrasonic guided wave technology utilizes the principle that ultrasonic waves propagating in the conductor will be reflected or scattered when encountering defects for detection; and UAV X-ray imaging technology directly acquires internal images by taking X-ray images of the clamps from the outside.

[0003] When these existing technologies are applied to the hidden and structurally constrained scenario of broken conductor strands inside suspension clamps, significant drawbacks are revealed. Electrical online monitoring methods (such as eddy current sensing) are easily affected by ambient temperature, electromagnetic interference, and conductor load fluctuations, resulting in insufficient sensitivity to early, minute single-strand breaks, making precise location difficult, and incurring high system deployment and maintenance costs. Ultrasonic guided wave technology is limited by the short-distance structural characteristics of the suspension clamp itself; the echo generated by the defect easily overlaps with the reflected wave from the clamp end face, making effective separation and identification difficult in engineering practice, resulting in unsatisfactory detection results. While UAV X-ray imaging technology can provide intuitive images, its equipment is expensive, its operation is severely constrained by airspace and weather conditions, its operation is complex, and it cannot achieve routine online monitoring; it is only suitable for planned inspections at specific points. Summary of the Invention

[0004] This invention provides a method, apparatus, device, and storage medium for detecting damage to the conductor and ground wire inside a suspension clamp, which can solve the above-mentioned problems in the prior art and improve the reliability of detecting damage to the conductor and ground wire inside a suspension clamp.

[0005] This invention provides a method for detecting damage to the conductor ground wire inside a suspension clamp, comprising: Obtain the normal conductor section and the damaged conductor section of the sample conductor; The normal conductor and ground wire data of the sample are determined based on the normal conductor and ground wire section of the sample, and the damaged conductor and ground wire data of the sample are determined based on the damaged conductor and ground wire section of the sample. Based on the preset conductor-ground impedance algorithm, the normal conductor-ground data of the sample, and the damaged conductor-ground data of the sample, the normal impedance of a single strand of the sample and the damaged impedance of a single strand of the sample are obtained. Based on the normal impedance of the sample single strand and the damaged impedance of the sample single strand, construct the conductor-to-ground wire state judgment relationship data; Obtain the conductor to be tested, and determine the reference conductor segment and the conductor segment to be judged based on the conductor to be tested; Obtain the set of single-strand impedances to be judged for the conductor-ground section to be judged, and obtain the reference single-strand conductor-ground impedance for the reference conductor-ground section. Obtain the reference single-strand conductor impedance of the reference conductor section; Based on the conductor-to-ground wire condition judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance, the damage detection result of the conductor-to-ground wire segment to be judged is determined.

[0006] In the above scheme, the normal impedance and damaged impedance of a single strand of the sample are calculated based on the normal conductor / ground wire section, the damaged conductor / ground wire section, and the preset conductor / ground wire impedance algorithm. This allows for the construction of conductor / ground wire state judgment relationship data, establishing a quantitative benchmark for subsequent judgment. By pre-constructing conductor / ground wire state judgment relationship data, this method only requires acquiring the single-strand impedance data of the reference conductor / ground wire section and the section to be judged on the same conductor / ground wire. By comparing the difference between the single-strand impedance set to be judged and the reference single-strand conductor / ground wire impedance, and making a judgment based on the pre-constructed conductor / ground wire state judgment relationship data based on the sample, the broken strand damage inside the suspension clamp can be accurately identified. This method transforms the complex problem of broken strand detection into the measurement and comparison of a single impedance parameter. It eliminates the need for expensive equipment and complex signal processing methods, achieving highly sensitive damage localization solely through basic electrical measurements. This significantly reduces detection costs and operational barriers while effectively improving the reliability of conductor / ground wire damage detection within the suspension clamp.

[0007] Further, the sample normal conductor data includes the effective number of strands in the conductor, the resistance per unit length of the conductor, the sample pitch length, and the equivalent contact resistance of the conductor. The step of obtaining the normal impedance of a single strand and the damaged impedance of a single strand based on a preset conductor impedance algorithm, the sample normal conductor data, and the sample damaged conductor data includes: The ground wire resistance is obtained by multiplying the resistance per unit length of the ground wire and the sample pitch length. The ratio of the conductor resistance to the effective number of strands in the conductor is obtained as the initial normal conductor impedance. The sum of the initial normal conductor impedance and the equivalent contact resistance of the conductor is obtained as the sample single-strand normal impedance.

[0008] In the above scheme, the initial normal conductor impedance is calculated by introducing the effective number of strands of the conductor and ground wire, the resistance per unit length of the conductor and ground wire, and the sample pitch length. The equivalent contact resistance of the conductor and ground wire is then added for correction, so that the calculation of the normal impedance of a single strand of the sample fully considers the parallel conduction characteristics under normal conditions, providing an accurate theoretical benchmark value for subsequent judgment.

[0009] Further, the step of acquiring the conductor to be detected and determining the reference conductor segment and the conductor segment to be judged based on the conductor to be detected includes: Based on the conductor to be tested, determine the conductor detection reference point and the standard pitch of the conductor; The reference conductor / ground wire segment and the conductor / ground wire segment to be judged are determined based on the conductor / ground wire detection reference point and the standard conductor / ground wire pitch.

[0010] In the above scheme, the reference section and the section to be judged are accurately located by the reference point of the conductor and the standard pitch of the conductor and the ground wire, ensuring that the two sections are located on the same conductor and the length is equal. This overcomes the technical problem that the wire clamp can not be directly observed due to obstruction, and fundamentally ensures the material consistency and electrical path comparability of the comparison objects.

[0011] Further, determining the conductor detection reference point and standard pitch based on the conductor to be detected includes: The conductor-to-ground wire section ratio and outer diameter are determined based on the conductor-to-ground wire to be tested. The product of the conductor pitch ratio and the conductor outer diameter is obtained as the standard pitch of the conductor.

[0012] In the above scheme, the standard pitch of the conductor and ground wire is calculated by multiplying the conductor-to-ground wire pitch ratio and the outer diameter of the conductor and ground wire, thus clarifying the process of obtaining the standard pitch of the conductor and ground wire and ensuring the reliability and repeatability of obtaining the standard pitch of the conductor and ground wire.

[0013] Further, obtaining the set of single-strand impedances to be determined for the conductor-to-ground section to be determined, and obtaining the reference single-strand conductor-to-ground impedance for the reference conductor-to-ground section, includes: Select a set of reference conductor segments with a preset number of strands from the reference conductor segments; Based on the set of reference conductor segments, a representative impedance set is obtained; The representative impedance set is summed to obtain the representative total impedance; Obtain the ratio of the total impedance to the preset number of strands to get the average reference impedance; Based on the mean of the reference impedance, the representative impedance set, and the preset number of strands, the standard deviation of the reference impedance is obtained; The reference single-strand ground wire impedance is obtained based on the preset safety factor, the mean value of the reference impedance, and the standard deviation of the reference impedance.

[0014] In the above scheme, the mean value and standard deviation of the benchmark impedance are obtained by statistical calculation of multiple samples in the benchmark section, and the benchmark single conductor ground impedance is generated by combining the safety factor. This not only reflects the typical value of the impedance under good condition, but also quantifies the inherent dispersion of the normal strand, providing a scientific and reliable quantitative basis for strand-by-strand judgment.

[0015] Further, determining the damage detection result of the conductor / ground wire segment to be judged based on the conductor / ground wire state judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor / ground wire impedance includes: The single-strand impedances to be judged in the set of single-strand impedances to be judged are compared with the reference single-strand conductor-to-ground impedance in turn. When the single-strand impedance to be judged is greater than the reference single-strand conductor-to-ground impedance, the damage detection sub-result of the single-strand impedance to be judged is determined to be damaged based on the conductor-to-ground state judgment relationship data. When the single-strand impedance to be judged is less than or equal to the reference single-strand conductor-to-ground impedance, the damage detection sub-result of the single-strand impedance to be judged is determined to be damaged without damage based on the conductor-to-ground state judgment relationship data. The damage detection result is obtained based on the damage detection sub-results corresponding to all the single-strand impedances in the set of single-strand impedances to be judged.

[0016] In the above scheme, by comparing the impedance of the single strand to be judged with the impedance of the reference single strand conductor and ground wire, and judging the relationship data based on the conductor and ground wire status, the independent and accurate identification of each conductor inside the clamp is achieved. It can locate the specific location and number of early minor strand breakage, and overcome the limitation of traditional methods that cannot locate single strands in a closed structure.

[0017] Furthermore, it also includes: The number of damaged strands is obtained based on the damage detection results, and a subset of damaged single-strand impedances is selected from the set of single-strand impedances to be judged based on the damage detection results. Based on the damaged single-strand impedance subset, the average reference impedance, and the number of damaged strands, the average impedance change rate of the damaged strands is obtained; The total number of shares to be judged is determined based on the conductor / ground wire segment to be judged. A comprehensive damage index is obtained based on the total number of shares to be judged, the number of damaged shares, and the average impedance change rate of the damaged shares.

[0018] In the above scheme, a comprehensive damage index is obtained by considering the total number of strands to be judged, the number of damaged strands, and the average impedance change rate of the damaged strands. At the same time, the breadth and depth of the damage are taken into account, so as to realize the hierarchical quantification of the overall health status of the conductors in the clamp, and provide a multi-dimensional decision basis for line operation and maintenance from qualitative analysis of individual strands to quantitative analysis of the whole.

[0019] Another embodiment of the present invention provides a device for detecting damage to the ground wire inside a suspension clamp, comprising: The sample segment acquisition module is used to acquire the normal conductor segment and the damaged conductor segment of the sample conductor. The basic data acquisition module is used to determine the normal conductor and ground wire data of the sample based on the normal conductor and ground wire section of the sample, and to determine the damaged conductor and ground wire data of the sample based on the damaged conductor and ground wire section of the sample. The impedance data acquisition module is used to obtain the normal impedance of a single strand of a sample and the damaged impedance of a single strand of a sample based on a preset conductor-ground impedance algorithm, the normal conductor-ground data of the sample, and the damaged conductor-ground data of the sample. The relational data construction module is used to construct relational data for judging the state of the conductor and ground wire based on the normal impedance of the sample single strand and the damaged impedance of the sample single strand. The detection section division module is used to acquire the conductor and ground wire to be detected, and to determine the reference conductor and ground wire section and the conductor and ground wire section to be judged based on the conductor and ground wire to be detected; The module for obtaining the set of single-strand impedances to be judged is used to obtain the set of single-strand impedances to be judged for the section of conductor to be judged, and to obtain the reference single-strand conductor impedance for the section of reference conductor to be judged. The damage detection result acquisition module is used to determine the damage detection result of the conductor-to-ground wire segment to be judged based on the conductor-to-ground wire state judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance.

[0020] Another embodiment of the present invention also provides a terminal device, including: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the steps of the method for detecting damage to the ground wire inside the suspension clamp as described in the present invention.

[0021] Another embodiment of the present invention also provides a computer-readable storage medium item, including: a stored computer program, which, when the computer program is running, controls the device where the computer-readable storage medium is located to perform the steps of the suspension clamp internal conductor damage detection method of the present invention. Attached Figure Description

[0022] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic flowchart of a method for detecting damage to the conductor ground wire inside a suspension clamp according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a suspension clamp internal conductor damage detection device provided in an embodiment of the present invention. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0028] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0029] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0031] See Figure 1 To address the aforementioned problems in the prior art and improve the reliability of ground wire damage detection within suspension clamps, an embodiment of the present invention provides a method for detecting ground wire damage within suspension clamps, comprising: Step S1: Obtain the normal conductor section and the damaged conductor section of the sample conductor; Step S2: Determine the normal conductor and ground wire data of the sample based on the normal conductor and ground wire segment of the sample, and determine the damaged conductor and ground wire data of the sample based on the damaged conductor and ground wire segment of the sample. Step S3: Based on the preset conductor-to-ground impedance algorithm, sample normal conductor-to-ground data, and sample damaged conductor-to-ground data, obtain the sample single-strand normal impedance and sample single-strand damaged impedance. Step S4: Based on the normal impedance and damaged impedance of a single strand of the sample, construct the relationship data for judging the state of the conductor and ground wire; Step S5: Obtain the conductor to be tested, and determine the reference conductor segment and the conductor segment to be judged based on the conductor to be tested; Step S6: Obtain the set of single-strand impedances of the conductor-to-ground section to be judged, and obtain the reference single-strand conductor-to-ground impedance of the reference conductor-to-ground section. Step S7: Based on the conductor-to-ground wire condition judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance, determine the damage detection result of the conductor-to-ground wire section to be judged.

[0032] In the above scheme, the normal impedance and damaged impedance of a single strand of the sample are calculated based on the normal conductor / ground wire section, the damaged conductor / ground wire section, and the preset conductor / ground wire impedance algorithm. This allows for the construction of conductor / ground wire state judgment relationship data, establishing a quantitative benchmark for subsequent judgment. By pre-constructing conductor / ground wire state judgment relationship data, this method only requires acquiring the single-strand impedance data of the reference conductor / ground wire section and the section to be judged on the same conductor / ground wire. By comparing the difference between the single-strand impedance set to be judged and the reference single-strand conductor / ground wire impedance, and making a judgment based on the pre-constructed conductor / ground wire state judgment relationship data based on the sample, the broken strand damage inside the suspension clamp can be accurately identified. This method transforms the complex problem of broken strand detection into the measurement and comparison of a single impedance parameter. It eliminates the need for expensive equipment and complex signal processing methods, achieving highly sensitive damage localization solely through basic electrical measurements. This significantly reduces detection costs and operational barriers while effectively improving the reliability of conductor / ground wire damage detection within the suspension clamp.

[0033] It should be noted that the sample normal conductor / ground wire section refers to a section taken from the exposed part of the conductor / ground wire and confirmed to be without any damage, while the sample damaged conductor / ground wire section refers to a section taken from the same type of conductor / ground wire and known to have strand breakage damage. Both are used to construct the conductor / ground wire state judgment relationship data required for subsequent determination. The sample normal conductor / ground wire data includes basic parameters that characterize the electrical structure and material properties of the section, while the sample damaged conductor / ground wire data includes relevant parameters that characterize the changes in the electrical path under strand breakage conditions. The preset conductor / ground wire impedance algorithm is constructed based on a lumped parameter circuit model. This model equates the electrical structure of a multi-strand strand within one pitch to a circuit network containing strand self-impedance and inter-strand contact impedance. By substituting the structural parameters under different states, the corresponding single-strand impedance values ​​are calculated. The conductor / ground wire state judgment relationship data is used to characterize the difference in impedance values ​​of a single-strand conductor / ground wire under normal and damaged states, serving as a quantitative basis for subsequent determination of whether the conductor / ground wire to be tested is damaged.

[0034] Furthermore, the reference conductor section is taken from the exposed portion of the conductor to be tested and confirmed to be undamaged. The section to be judged is taken from the portion of the same conductor to be tested that covers the suspension clamp. Both sections are located on the same conductor to ensure consistency in material and aging degree, and their axial lengths are equal. The single-strand impedance to be judged is a representative value obtained by averaging multiple measurements of each outermost strand of the conductor to be judged section. The reference single-strand conductor impedance is a characteristic value obtained by statistical processing of measurement data from multiple sample strands in the reference conductor section, used to characterize the normal range of single-strand impedance of the conductor in an intact state. The damage detection results include a qualitative judgment of whether each strand is damaged and a quantitative assessment of the overall damage degree.

[0035] In another embodiment, the sample normal conductor data includes the effective number of strands in the conductor, the resistance per unit length of the conductor, the sample pitch length, and the equivalent contact resistance of the conductor. The step of obtaining the normal impedance of a single strand and the damaged impedance of a single strand based on a preset conductor impedance algorithm, the sample normal conductor data, and the sample damaged conductor data includes: The ground wire resistance is obtained by multiplying the resistance per unit length of the ground wire and the sample pitch length. The ratio of the conductor resistance to the effective number of strands in the conductor is obtained as the initial normal conductor impedance. The sum of the initial normal conductor impedance and the equivalent contact resistance of the conductor is obtained as the sample single-strand normal impedance.

[0036] It should be noted that this calculation process corresponds to the circuit model of multi-strand strands conducting in parallel under normal conditions. The effective number of strands in the ground wire is the total number of outermost strands participating in parallel conduction. The equivalent contact resistance of the ground wire is used to correct the impedance change caused by the weak current shunting effect between strands. In a normal ground wire, this value is usually small and can be determined empirically or by actual measurement in engineering applications. Specifically: the electrical structure of the multi-strand strands in the sample ground wire is equivalent within one pitch. When the strands are in a normal state, current is injected into one strand through a current source. Current injection point A and grounding point B are located on the same strand and are one pitch apart. Since the strands are continuous, the current mainly flows along the low-resistance path of the strand, and the contact resistance can be ignored. Therefore, theoretically, the theoretical impedance of a single strand in the sample ground wire at a single pitch is... It is calculated by the following formula: ; In the formula, The resistance per unit length of the sample ground wire is given by the sample ground wire, in units of . L is the pitch length of a single sample, in meters; I is the magnitude of the injected current, in amperes (A); U is the measured voltage between points A and B, in volts (V).

[0037] However, in actual operating conditions, even if the stranded wire is undamaged, current will still be shunted between the strands. Therefore, the actual impedance, i.e., the normal impedance of a single strand in the sample, will be affected. Should be smaller The actual impedance, i.e., the normal impedance of a single sample strand, should be corrected to the value obtained by the preset conductor-to-ground impedance algorithm using the following formula: ; In the formula, Q is the effective number of strands in the conductor and ground wire. In the normal conductor and ground wire section of the sample, assuming the number of strands is q, then Q = q. The equivalent contact resistance of the ground wire in a parallel path is typically very small. For ground wire resistance, This is the initial normal conductor ground impedance.

[0038] Furthermore, regarding step S3: based on the preset conductor-to-ground impedance algorithm, the normal conductor-to-ground data of the sample, and the damaged conductor-to-ground data of the sample, the normal impedance of a single strand of the sample and the damaged impedance of a single strand of the sample are obtained, specifically: Within the measured pitch, assume that a total of k stocks, including the target stock and its adjacent stocks, break. Experience shows that strand A typically breaks near the same location, forming a single equivalent gap. Therefore, we do not consider the case where the break points are dispersed and the current needs to bypass multiple points. The current flows from injection point A to grounding point B, bypassing all break points. Its path can be abstracted as bypassing other strands through the inter-strand contact before the break point, jumping to the still-connected strand group through the contact resistance, advancing in this parallel network, and then bypassing the break point to reach the original target strand B. Therefore, we consider the impedance at a single pitch when strand A breaks, i.e., the sample single-strand damage impedance. Alternatively, it can be obtained using a preset conductor-to-ground impedance algorithm: ; Specifically, assuming the damaged strand is 'a' and the number of strands is 'q', the effective number of strands in the ground wire is Q = qa. At this point, the equivalent contact resistance of the ground wire is... = Where n is the number of effective cross-strand transfers, specifically the number of effective cross-strand transfers required for the current to travel from the injection point to the grounding point, which is determined by the specific distribution of the break points; The contact resistance between contact points, in units of Substituting the above into the preset conductor-to-ground impedance algorithm, the single-strand damage impedance of the sample can be obtained. Specifically: ; The key point is that when the current passes around the break point, it propagates in parallel across the effective strands of the (qa) conductor ground wire. The equivalent propagation length is slightly less than L, but its resistance is slightly higher due to the tortuous path, and therefore approximately equal to L. Thus, in the damaged conductor ground wire section of the sample... It can be approximated as .

[0039] Furthermore, regarding step S4: based on the normal impedance of the sample single strand and the damaged impedance of the sample single strand, construct conductor-to-ground wire state judgment relationship data, specifically: The normal impedance of a single strand of the sample and the damaged impedance of a single strand of the sample are compared: ; In the formula, This is the impedance comparison value. It is the main source of impedance increment because of the inter-strand contact resistance. The fracture will reduce the number of effective cross-share transfers. This leads to a significant increase in impedance. The remaining term is directly affected by the number of fractured strands; the larger k is, the larger this term becomes, but it is a secondary factor compared to the first term. Therefore, it can be seen that as long as fracture occurs, regardless of the number or distribution of fractured strands, the single-strand damage impedance of the sample remains constant. All will be significantly greater than the normal impedance of a single strand in the sample. In other words, whenever a break occurs, the impedance comparison value will be greater than 0. This conclusion is used as data to judge the condition of the conductor and ground wire, serving as a benchmark for directly determining whether there is damage to the conductor and ground wire through impedance. The core mechanism is that the breakage of the stranded wire introduces an unavoidable and relatively large contact resistance. .

[0040] In another embodiment, the step of acquiring the conductor to be detected and determining the reference conductor segment and the conductor segment to be judged based on the conductor to be detected includes: Based on the conductor to be tested, determine the conductor detection reference point and the standard pitch of the conductor; The reference conductor / ground wire segment and the conductor / ground wire segment to be judged are determined based on the conductor / ground wire detection reference point and the standard conductor / ground wire pitch.

[0041] It should be noted that, regarding the calculation of the standard pitch of the conductor and ground wire, determining the accurate location of the detection point, which is also the reference point for conductor and ground wire detection, and installing the clamp, specifically: the reference point for conductor and ground wire detection serves as the starting reference position for subsequent measurements. Starting from the reference point, measure a distance of one standard pitch along the conductor axis away from the clamp; this segment is the reference conductor and ground wire segment. Starting from the same reference point, measure a distance of one standard pitch along the conductor axis across the clamp body to the other side; this segment is the conductor and ground wire segment to be judged. Using this method, even when the inside of the clamp cannot be directly observed, the obstructed detection point located on the same strand as the reference point can be accurately located. It is important to note that both the set of reference conductor and ground wire segments in the reference conductor and ground wire segment and the set of conductor and ground wire segments to be judged in the segment to be judged are stranded wires.

[0042] In another embodiment, determining the conductor ground wire detection reference point and the standard pitch of the conductor ground wire based on the conductor ground wire to be detected includes: The conductor-to-ground wire section ratio and outer diameter are determined based on the conductor-to-ground wire to be tested. The product of the conductor pitch ratio and the conductor outer diameter is obtained as the standard pitch of the conductor.

[0043] It should be noted that the first step in calculating the standard pitch of the conductor and ground wire, determining the accurate location of the detection point (i.e., the reference point for conductor and ground wire detection), and installing the clamp, is explained in detail below: The conductor-to-ground wire pitch ratio refers to the ratio of the conductor pitch to its outer diameter. This parameter is determined by the conductor type and manufacturing process and is a preset value; the outer diameter of the conductor and ground wire refers to the diameter of the conductor's cross-section. The standard pitch calculated by this method is an inherent geometric parameter of that type of conductor, used to ensure that the length of the measurement section matches the periodicity of the conductor stranding structure, while keeping the section length within a range convenient for on-site operation. Specifically: The standard pitch of the conductor / ground wire is calculated using the following formula: ; In the formula, 1 is the standard pitch of the conductor / ground wire, in mm; m is the conductor / ground wire pitch-to-diameter ratio, i.e., the ratio of pitch to conductor outer diameter; D is the conductor / ground wire outer diameter, in mm.

[0044] Furthermore, regarding step S6: obtaining the set of single-strand impedances to be judged for the conductor-to-ground section to be judged, and obtaining the reference single-strand conductor-to-ground impedance for the reference conductor-to-ground section, specifically: Obtain the single-strand impedance of each conductor segment to be judged in the section to be judged, and obtain a set of single-strand impedances to be judged based on the single-strand impedances corresponding to all conductor segments to be judged in the section to be judged; obtain the effective voltage value of the stranded wire in each conductor segment to be judged in the section to be judged. To facilitate subsequent data comparison and analysis, the subscript {measurement section, strand number, current RMS value, sequence number} is used as the identifier. Here, seg represents the measurement section of the conductor / ground wire segment to be judged. For a specified section and a specified conductor / ground wire segment with number i, assuming the current RMS values ​​are 1A, 2A, and 3A respectively, the current RMS value j can take the values ​​1, 2, and 3, and J is the set of current RMS values. Assuming a total of 5 measurements were taken, the sequence number k can take the values ​​1-5, and K is the set of sequence numbers. The impedance of the single strand to be judged is then calculated using the following formula: ; in, This refers to the single-strand impedance of the conductor-to-ground line segment numbered i.

[0045] In another embodiment, obtaining the set of single-strand impedances to be determined for the conductor-to-ground section to be determined, and obtaining the reference single-strand impedance of the reference conductor-to-ground section, includes: Select a set of reference conductor segments with a preset number of strands from the reference conductor segments; Based on the set of reference conductor segments, a representative impedance set is obtained; The representative impedance set is summed to obtain the representative total impedance; Obtain the ratio of the total impedance to the preset number of strands to get the average reference impedance; Based on the mean of the reference impedance, the representative impedance set, and the preset number of strands, the standard deviation of the reference impedance is obtained; The reference single-strand ground wire impedance is obtained based on the preset safety factor, the mean value of the reference impedance, and the standard deviation of the reference impedance.

[0046] It should be noted that the preset number of strands M is the sample size selected from the outermost strand of the reference section. Typically, at least three strands are selected and evenly distributed circumferentially to eliminate random errors in individual strands and reflect the overall distribution characteristics. Each element in the representative impedance set is the average impedance of the corresponding strand obtained by averaging multiple measurements; that is, it is obtained using the same measurement and calculation method as the impedance of the strand to be judged. The reference impedance mean is used to characterize the typical value of the single-strand impedance in a healthy state, and the reference impedance standard deviation is used to characterize the inherent dispersion between normal strands. The reference single-strand conductor impedance is specifically represented as the damage judgment threshold, which is equal to the reference impedance mean plus the product of the safety factor and the reference impedance standard deviation. The safety factor is a preset empirical value, typically ranging from 3 to 5, used to achieve a balance between detection sensitivity and false alarm risk. Specifically, the reference impedance mean is: ; in, M is the average reference impedance, and the number of strands is a preset number. The value of i is selected from the quantity corresponding to the reference sample. The reference sample is the set of reference conductor and ground wire segments with a preset number of strands selected from the reference conductor and ground wire segment. In other words, i is the number of the reference conductor and ground wire segment specified in the set of reference conductor and ground wire segments. Let be the representative impedance of the i-th numbered reference conductor segment. Summing up each representative impedance in the set of representative impedances yields the total representative impedance. Then, based on the mean of the reference impedance, the representative impedance set, and the preset number of strands, the standard deviation of the reference impedance is obtained: ; in, M represents the standard deviation of the reference impedance, and M is the preset number of strands. Furthermore, based on the preset safety factor, the mean of the reference impedance, and the standard deviation of the reference impedance, the reference single-strand conductor ground impedance is obtained, specifically: The core of damage assessment lies in determining whether the impedance values ​​of each strand in the tested section have significantly deviated from the normal statistical distribution of intact strands. This method uses a statistical threshold based on a multiple of the standard deviation for assessment. ; In the formula, A preset safety factor is used, the value of which determines the stringency of the judgment criteria. A larger factor results in a lower risk of false alarms, but also a corresponding decrease in sensitivity to early, minor damage. Based on the reliability requirements of engineering testing, The recommended value range is 3 to 5. The reference single-strand ground wire impedance.

[0047] In another embodiment, determining the damage detection result of the conductor-to-ground wire segment based on the conductor-to-ground wire state judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance includes: The single-strand impedances to be judged in the set of single-strand impedances to be judged are compared with the reference single-strand conductor-to-ground impedance in turn. When the single-strand impedance to be judged is greater than the reference single-strand conductor-to-ground impedance, the damage detection sub-result of the single-strand impedance to be judged is determined to be damaged based on the conductor-to-ground state judgment relationship data. When the single-strand impedance to be judged is less than or equal to the reference single-strand conductor-to-ground impedance, the damage detection sub-result of the single-strand impedance to be judged is determined to be damaged without damage based on the conductor-to-ground state judgment relationship data. The damage detection result is obtained based on the damage detection sub-results corresponding to all the single-strand impedances in the set of single-strand impedances to be judged.

[0048] It should be noted that the damage detection sub-result may be that the set of single-strand impedances to be judged is greater than the reference single-strand conductor-to-ground impedance, or it may be that the set of single-strand impedances to be judged is less than the reference single-strand conductor-to-ground impedance. The conductor-to-ground state judgment relationship data is derived from the theoretical conclusion in sample analysis that the normal impedance of a sample single-strand is necessarily less than the damaged impedance of a sample single-strand. Therefore, when the single-strand impedance to be judged is greater than the reference single-strand conductor-to-ground impedance, based on the conclusion in the conductor-to-ground state judgment relationship data that as long as a break occurs, the impedance comparison value will be greater than 0, that is, the normal impedance of a sample single-strand will definitely be greater than the damaged impedance of a sample single-strand. Thus, it can be determined that the damage detection sub-result of the single-strand impedance to be judged is damaged, that is, the conductor-to-ground segment corresponding to the single-strand impedance to be judged is damaged. Conversely, it is determined that there is no damage. The damage detection sub-results corresponding to all the single-strand impedances to be judged are summarized to obtain the damage detection result.

[0049] In another embodiment, the method for detecting damage to the ground wire inside the suspension clamp further includes: The number of damaged strands is obtained based on the damage detection results, and a subset of damaged single-strand impedances is selected from the set of single-strand impedances to be judged based on the damage detection results. Based on the damaged single-strand impedance subset, the average reference impedance, and the number of damaged strands, the average impedance change rate of the damaged strands is obtained; The total number of shares to be judged is determined based on the conductor / ground wire segment to be judged. A comprehensive damage index is obtained based on the total number of shares to be judged, the number of damaged shares, and the average impedance change rate of the damaged shares.

[0050] It should be noted that the average impedance change rate is calculated only for all conductor segments identified as damaged. The average impedance change rate of the damaged segment is defined by the following formula: ; In the formula, This refers to the single-strand impedance corresponding to the damaged section of the conductor-to-ground wire segment numbered i. It's important to note that the value of i here represents the number of damaged strands, i.e., the number of damaged conductor-to-ground wire segments. The number of damaged segments.

[0051] The comprehensive injury index is defined as the geometric mean of the proportion of injured stocks and the average rate of change, and is given by the following formula: ; Where N represents the total number of strands to be assessed. The overall health condition of the conductors within the clamp is graded according to the range of the comprehensive damage index E. For example, if... If it is, then it is judged as a general defect; if If so, it is considered a material defect; if If so, it is judged as a serious defect.

[0052] The following is an embodiment to illustrate the overall process of the solution: First, based on the normal impedance of the sample single strand and the damaged impedance of the sample single strand, the relationship data for judging the state of the conductor and ground wire is constructed. That is, as long as a break occurs, regardless of the number of broken strands or their distribution, the normal impedance of the sample single strand is significantly less than the damaged impedance of the sample single strand.

[0053] Subsequently, before acquiring the conductor to be tested and determining the reference conductor segment and the conductor segment to be judged based on the conductor to be tested, a dual-segment comparison detection scheme needs to be designed. Specifically: First, a suitable detection distance needs to be determined. Specifically, this invention defines the detection distance as the length of one standard pitch of the conductor being tested. The basis for this determination is as follows: based on the pitch ratio, the pitch of steel-cored aluminum stranded wire is typically 200-300mm, while the length of the suspension clamp sheath is typically 200-250mm. These two lengths are roughly equivalent, which is sufficient to allow the detection distance to span both ends of the suspension clamp. If the distance is too short, it cannot span the entire clamp, making it impossible to manipulate the stranded wire inside the clamp in actual operation, thus rendering it infeasible. If the distance is too long, although theoretically feasible, it would exceed the operator's comfortable arm span range for a single operation, forcing the operation to be performed in segments or requiring frequent body movements. This could easily cause the relative position between the clamp and the conductor to sway or shift due to changes in body position, significantly increasing the risk of unstable contact and reducing the repeatability and reliability of the detection results. Therefore, the standard detection distance should be the standard pitch of a single conductor.

[0054] Secondly, to accurately determine the damage state of the stranded wire inside the suspension clamp, i.e., the conductor to be tested, it is necessary to obtain a known impedance reference value of an intact conductor to be tested as a comparison standard. Therefore, the field measurement operation of this method includes two necessary steps. First, a section of the intact section, separated by one pitch length, should be selected as the reference conductor section, and the stranded wire in it should be... Perform measurements to obtain the reference single-strand ground wire impedance at that location. The first section should be adjacent to the section being tested and confirmed to be undamaged; typically, a section of exposed stranded wire visible outside the clamp is selected. Secondly, within the section being tested—that is, the same conductor covering the suspension clamp body—a section of stranded wire spaced one pitch apart should be selected as the conductor / ground wire section to be assessed. Measurements are performed to obtain the set of single-strand impedances to be determined. To improve operational efficiency, contact points can be set at appropriate locations to make one measurement point of the reference conductor / ground wire segment... A measurement point of the single-strand impedance set to be judged The points coincide at point O. This design keeps the connection at this point unchanged when changing measurement sections, thereby reducing the amount of repetitive work.

[0055] Subsequently, to address the technical challenge of unstable contact, a perforated clamp was used. In actual operation, due to the hard and flat metal surface of the stranded wire, conventional test probes struggle to maintain stable contact, easily slipping and causing unstable contact resistance, severely impacting the repeatability and accuracy of measurements. To overcome this technical obstacle, this invention designs a perforated clamp. The clamp's main body consists of two symmetrical C-shaped shells made of high-strength insulating engineering plastic, whose mechanical strength is sufficient to ensure stable clamping of the wire. The shells reliably fix the wire through four screw holes and matching fastening bolts. Each C-shaped shell has three pre-set probe holes, the specific number of which can be adapted to the testing requirements of different stranded wire models, used for precise positioning and fixing of the current injection probe and voltage measurement probe.

[0056] Finally, Ohm's law is used to determine the impedance measurement method and select the optimal excitation frequency: Impedance measurement is based on Ohm's law. In this application, a constant current excitation and voltage measurement scheme is adopted to ensure measurement stability and accuracy. If a constant voltage current measurement method is used, a current transformer (CT) needs to be connected in series in the line, which has poor installation stability and its accuracy is easily affected by core nonlinearity and position. In contrast, using a constant current source to output a known current and measuring the voltage between the two contact points with an oscilloscope allows for a more accurate calculation of the loop impedance. This method requires high accuracy from the current source and is more suitable for stable measurement of micro-ohm level impedances in the field. The selection of the excitation frequency needs to balance signal penetration and system signal-to-noise ratio. Although the transmission line is de-energized, the skin effect of the conductor still needs to be considered in the frequency selection. The skin depth is calculated by the following formula: ; In the formula, Skin depth, measured in meters, represents the current density at which it decays to the surface value. Depth at the location; The resistivity of the stranded wire material, in units of... For aluminum, approximately f is the excitation frequency, in Hz; The magnetic permeability of the stranded wire material. For non-magnetic materials such as aluminum, Excitation frequency is too high, such as higher than... The skin depth is significantly reduced, the current concentrates on the surface of the conductor, and the response to internal strand breakage is weakened; if the frequency is too low, such as below... Then it is easy to introduce Noise levels increase and the measurement system response slows down. Therefore, the specific value of f must be determined based on the specific circumstances. For example, the radius of a typical aluminum stranded wire is approximately 1.5~2mm, and the optimal frequency range verified is between 100Hz and 1kHz. Within this range, the skin depth is greater than the strand radius, ensuring that the excitation current can fully penetrate the conductor cross-section, thus maintaining high sensitivity to internal strand breakage defects. At the same time, this frequency band can effectively avoid major environmental electromagnetic noise, which is beneficial for achieving high signal-to-noise ratio measurements.

[0057] Furthermore, before acquiring the conductor to be tested and determining the reference conductor segment and the conductor segment to be judged based on the conductor to be tested, a standardized testing procedure needs to be implemented before subsequent damage detection tests can be carried out. Specifically: First, it is necessary to determine the approximate range of the detection point, i.e., the reference point for conductor and ground wire detection. The surface near the reference point needs to be pre-treated. To ensure the stability of electrical contact and the repeatability of measurement results, the surface near the stranded wire detection point must be pre-treated before installing the fixture and performing the measurement. Specifically: The first step is to determine the approximate range of the test points, i.e., the reference points for conductor and ground wire testing. Initially, two test range points are determined on the conductor positions corresponding to the sheath ends on both sides of the clamp. Then, a third test range point is selected on the exposed conductor segment away from the clamp; its axial distance from either of the previous two points should be approximately one standard conductor / ground wire pitch. The second step is preliminary cleaning and descaling. Using a dry microfiber cloth or precision electronic cleaning swabs, vigorously wipe the pre-selected test points and the surrounding area of ​​approximately 2cm to remove loose dirt such as dust, oil, and salt spray crystals adhering to the conductor surface. If the dirt is severe, high-purity anhydrous ethanol (concentration...) can be used as a supplement. The first step is to wipe the surface of the stranded aluminum wire with a damp cloth. After the ethanol has completely evaporated, proceed to the next step. The third step is mechanical polishing to remove the oxide layer. This is the core of the pretreatment process, designed to remove the dense, non-conductive aluminum oxide layer on the surface of the stranded aluminum wire. Use 400# to 600# sandpaper or an equivalent rotary precision polishing head. Wrap the sandpaper tightly around the arc surface of the strand where the test point is located, and polish along the wire axis in a short (approximately 2-3 cm) concentric circular motion. Continue polishing until the surface of the strand uniformly displays a metallic silver-white luster, with no visible black or grayish-white oxide spots. Typically, proper polishing requires 10-15 effective reciprocating strokes. After completion, repeat the above operation on the remaining strands. The fourth step is final cleaning and drying. Immediately after polishing, use a cleaning cloth or cotton swab dampened with anhydrous ethanol to thoroughly wipe the polished area, removing all metal debris and abrasive residue. Then, wipe it dry with another dry cleaning cloth and wait about 10 seconds to ensure the surface is completely dry.

[0058] Secondly, the standard pitch of the conductor and ground wire is calculated to determine the accurate location of the detection point, which is also the reference point for conductor and ground wire detection, and the clamp is installed. Due to the obstruction of the suspension clamp, it is impossible to confirm whether the detection points on both sides of the clamp are located on the same strand of conductor by direct observation or tracing. To solve this problem, this invention uses the standard pitch value of the stranded wire as a reference and uniquely determines the location of the obstructed point by measuring the axial distance from the known reference point. Specifically: The first step is to calculate the standard pitch of the conductor and ground wire. The second step is to determine the reference point and install the intermediate clamp. On one side of the suspension clamp, 2-3 cm from the hull, select an easily identifiable location (such as the top of a strand) as the initial reference point, marked as point O, and install the first testing clamp at this location. The third step is to locate and mark the remaining two points. Using the newly installed clamp point O as the reference point for conductor and ground wire testing, measure the distance of the standard pitch of the conductor and ground wire across the clamp body along the conductor axis to the other side. This point should be located at the sheath boundary at the other end of the clamp; mark this location as point A, which is the testing point on the other side of the clamp. Again, using point O as the reference, measure the distance of the standard pitch of the conductor and ground wire along the conductor axis away from the clamp (i.e., in the opposite direction to point A), marking this location as point B, which is located on the completely exposed conductor segment. This provides a precise geometrical basis for subsequent measurements. Subsequent secondary verification will focus on confirming whether the electrical connectivity between these points matches the geometric positioning. The fourth step is to install the clamp. Align the two symmetrical C-shaped insulating shells at the marked point on the conductor, ensuring the test lead holes on the shells are aligned with the target strand at that point. Pass the four fastening bolts through the screw holes on the shells in sequence, and initially tighten the nuts by hand. Fine-tune the circumferential position of the clamp, ensuring the center of the designated test lead hole is precisely aligned with the center of the target strand, then alternately tighten the four nuts. This operation ensures that the clamp is evenly stressed along the conductor's circumference, avoiding unilateral stress that could cause misalignment. After installation, attempt to manually twist or move the clamp axially to confirm that it is not loose or slipping on the conductor. Simultaneously, reconfirm the alignment of the test lead holes with the target strand. The clamp installation is now complete and does not need to be moved before the end of the test.

[0059] Next, all the outermost aluminum strands of the conductor under test (i.e., the conductor to be tested) are numbered and marked: To ensure accurate and repeatable positioning of the same conductor when performing strand-by-strand testing on the section covered by the suspension clamp, all the outermost aluminum strands of the conductor to be tested must be numbered and marked. This solution provides a standard marking method. The uppermost strand of the clamp conductor should be selected as strand number 1, and starting from strand number 1, all the outermost strands are numbered sequentially along the spiral direction of the conductor stranding.

[0060] Next, the detection system connection is completed based on the four-wire connection method: After completing the system numbering of the outer strands of the conductor to be tested, the detection fixture and measuring instrument can be correctly connected to form a complete measurement circuit, and the strand-by-strand impedance measurement can begin. This section first describes the measurement connection method for a specific single-strand conductor (strand number 1) in the confirmed intact reference conductor section (OB section): The first step is to connect the current excitation circuit. Connect the positive output line of the constant current source to the current injection hole aligned with strand number 1 on the O-point fixture; connect the negative output line of the constant current source to the current return hole aligned with strand number 1 on the B-point fixture. The second step is to connect the voltage sensing circuit. Take the first channel (CH1) probe of the oscilloscope and clamp its probe clip to the metal rod of the current injection probe at the O-point fixture. Clamp the probe's grounding clip to the metal rod of the current return probe at the B-point fixture. The third step is system settings. Set the output current of the constant current source. Excitation frequency Set the oscilloscope's coupling mode to AC coupling and enable the oscilloscope's root mean square (RMS) automatic measurement function to read stable voltage values.

[0061] Finally, the multi-strand wire was systematically measured and data was collected. The standardized testing procedure for single-strand data acquisition is as follows, taking the first strand of the reference conductor / ground wire section as an example. Before starting the measurement, apply moderate pressure perpendicular to the conductor surface and pointing towards the axis to the red and black probes on the clamps at points O and B, respectively, to eliminate the influence of small gaps or oxide layers on the contact surface. Press the Autoset function key on the oscilloscope, and after the waveform on the screen stabilizes, record and store the effective voltage value of the reference conductor / ground wire section measured by the oscilloscope at this time. To facilitate subsequent data comparison and analysis, {measurement section, stock number, current RMS value, serial number} is used as the subscript identifier. Subsequently, the voltage RMS value is recorded every fixed number of seconds (e.g., 10 seconds), for a fixed number of times (e.g., 5 times). The data is denoted as... ( After completing the above measurements, keep the test frequency constant and adjust the output current to other current values, such as 2A and 3A. Record the effective voltage value at equal intervals, and record the data as follows. ( At this point, the baseline impedance data acquisition for strand 1 of the baseline conductor / ground wire section is complete. After completing the baseline measurement of strand 1 of the baseline conductor / ground wire section (OB section), the impedance data acquisition for all other strands to be tested must be completed according to the standardized testing procedure described above, including the complete measurement process for the remaining sample strands of the baseline conductor / ground wire section and all outer strands of the conductor / ground wire section to be judged (AO section).

[0062] Furthermore, for the stranded wire in the reference conductor / ground wire section, in addition to the already measured strand 1, more strands need to be selected evenly, such as two strands of the same specification. The data is recorded as follows: ( In this case, i is selected as 2, 3, etc. This is to obtain a statistically significant reference impedance range and reduce random errors in single strands. For the stranded wire in the conductor-to-ground section to be judged, the data is recorded as... ( This requires measuring each and every one of the outermost strands (denoted as N). This is a necessary step to locate the specific damaged strand. Finally, based on the above method, it is determined whether there is damage and a comprehensive damage index is obtained.

[0063] Based on the above method embodiments, corresponding apparatus embodiments are provided; like Figure 2 As shown, an embodiment of the present invention provides a device for detecting damage to the ground wire inside a suspension clamp, comprising: The sample segment acquisition module is used to acquire the normal conductor segment and the damaged conductor segment of the sample conductor. The basic data acquisition module is used to determine the normal conductor and ground wire data of the sample based on the normal conductor and ground wire section of the sample, and to determine the damaged conductor and ground wire data of the sample based on the damaged conductor and ground wire section of the sample. The impedance data acquisition module is used to obtain the normal impedance of a single strand of a sample and the damaged impedance of a single strand of a sample based on a preset conductor-ground impedance algorithm, the normal conductor-ground data of the sample, and the damaged conductor-ground data of the sample. The relational data construction module is used to construct relational data for judging the state of the conductor and ground wire based on the normal impedance of the sample single strand and the damaged impedance of the sample single strand. The detection section division module is used to acquire the conductor and ground wire to be detected, and to determine the reference conductor and ground wire section and the conductor and ground wire section to be judged based on the conductor and ground wire to be detected; The module for obtaining the set of single-strand impedances to be judged is used to obtain the set of single-strand impedances to be judged for the section of conductor to be judged, and to obtain the reference single-strand conductor impedance for the section of reference conductor to be judged. The damage detection result acquisition module is used to determine the damage detection result of the conductor-to-ground wire segment to be judged based on the conductor-to-ground wire state judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance.

[0064] In the above scheme, the normal impedance and damaged impedance of a single strand of the sample are calculated based on the normal conductor / ground wire section, the damaged conductor / ground wire section, and the preset conductor / ground wire impedance algorithm. This allows for the construction of conductor / ground wire state judgment relationship data, establishing a quantitative benchmark for subsequent judgment. By pre-constructing conductor / ground wire state judgment relationship data, this method only requires acquiring the single-strand impedance data of the reference conductor / ground wire section and the section to be judged on the same conductor / ground wire. By comparing the difference between the single-strand impedance set to be judged and the reference single-strand conductor / ground wire impedance, and making a judgment based on the pre-constructed conductor / ground wire state judgment relationship data based on the sample, the broken strand damage inside the suspension clamp can be accurately identified. This method transforms the complex problem of broken strand detection into the measurement and comparison of a single impedance parameter. It eliminates the need for expensive equipment and complex signal processing methods, achieving highly sensitive damage localization solely through basic electrical measurements. This significantly reduces detection costs and operational barriers while effectively improving the reliability of conductor / ground wire damage detection within the suspension clamp.

[0065] It is understood that the above-described device embodiments correspond to the method embodiments of the present invention, and can realize the method for detecting damage to the ground wire inside the suspension clamp provided by any of the above-described method embodiments of the present invention.

[0066] It should be noted that the device embodiments described above are merely illustrative, and some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can specifically be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0067] Based on the above embodiments of the method for detecting damage to the conductor and ground wire inside the suspension clamp, another embodiment of the present invention provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the method for detecting damage to the conductor and ground wire inside the suspension clamp according to any embodiment of the present invention.

[0068] For example, in this embodiment, the computer program can be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the terminal device.

[0069] The terminal device may be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.

[0070] The processor can 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. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the terminal device, connecting all parts of the terminal device via various interfaces and lines.

[0071] Based on the above-described method embodiments, another embodiment of the present invention provides a computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to execute the suspension clamp internal conductor damage detection method described in any of the above-described method embodiments of the present invention.

[0072] The modules / units integrated in the device / terminal equipment, if implemented as software functional units and sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in 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 device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.

[0073] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method for detecting damage to the ground wire inside a suspension clamp, characterized in that, include: Obtain the normal conductor section and the damaged conductor section of the sample conductor; The normal conductor and ground wire data of the sample are determined based on the normal conductor and ground wire section of the sample, and the damaged conductor and ground wire data of the sample are determined based on the damaged conductor and ground wire section of the sample. Based on the preset conductor-ground impedance algorithm, the normal conductor-ground data of the sample, and the damaged conductor-ground data of the sample, the normal impedance of a single strand of the sample and the damaged impedance of a single strand of the sample are obtained. Based on the normal impedance of the sample single strand and the damaged impedance of the sample single strand, construct the conductor-to-ground wire state judgment relationship data; Obtain the conductor to be tested, and determine the reference conductor segment and the conductor segment to be judged based on the conductor to be tested; Obtain the set of single-strand impedances to be judged for the conductor-to-ground section to be judged, and obtain the reference single-strand conductor-to-ground impedance for the reference conductor-to-ground section. Based on the conductor-to-ground wire condition judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance, the damage detection result of the conductor-to-ground wire segment to be judged is determined.

2. The method for detecting damage to the ground wire inside the suspension clamp according to claim 1, characterized in that, The sample normal conductor data includes the effective number of strands, resistance per unit length, pitch length, and equivalent contact resistance. The process of obtaining the sample single-strand normal impedance and sample single-strand damaged impedance based on a preset conductor impedance algorithm, the sample normal conductor data, and the sample damaged conductor data includes: The ground wire resistance is obtained by multiplying the unit length resistance of the ground wire and the sample pitch length. The ratio of the conductor resistance to the effective number of strands in the conductor is obtained as the initial normal conductor impedance. The sum of the initial normal conductor impedance and the equivalent contact resistance of the conductor is obtained as the sample single-strand normal impedance.

3. The method for detecting damage to the ground wire inside the suspension clamp according to claim 1, characterized in that, The step of acquiring the conductor to be detected and determining the reference conductor segment and the conductor segment to be judged based on the conductor to be detected includes: Based on the conductor to be tested, determine the conductor detection reference point and the standard pitch of the conductor; The reference conductor / ground wire segment and the conductor / ground wire segment to be judged are determined based on the conductor / ground wire detection reference point and the standard conductor / ground wire pitch.

4. The method for detecting damage to the ground wire inside the suspension clamp according to claim 3, characterized in that, The step of determining the conductor ground wire detection reference point and the standard pitch of the conductor ground wire based on the conductor ground wire to be detected includes: The conductor-to-ground wire section ratio and outer diameter are determined based on the conductor-to-ground wire to be tested. The product of the conductor pitch ratio and the conductor outer diameter is obtained as the standard pitch of the conductor.

5. The method for detecting damage to the ground wire inside the suspension clamp according to claim 1, characterized in that, The step of obtaining the set of single-strand impedances to be determined for the conductor-to-ground section to be determined, and obtaining the reference single-strand impedance of the reference conductor-to-ground section, includes: Select a set of reference conductor segments with a preset number of strands from the reference conductor segments; Based on the set of reference conductor segments, a representative impedance set is obtained; The representative impedance set is summed to obtain the representative total impedance; Obtain the ratio of the total impedance to the preset number of strands to get the average reference impedance; Based on the mean of the reference impedance, the representative impedance set, and the preset number of strands, the standard deviation of the reference impedance is obtained; The reference single-strand ground wire impedance is obtained based on the preset safety factor, the mean value of the reference impedance, and the standard deviation of the reference impedance.

6. The method for detecting damage to the ground wire inside the suspension clamp according to claim 5, characterized in that, The step of determining the damage detection result of the conductor-to-ground wire segment based on the conductor-to-ground wire state judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance includes: The single-strand impedances to be judged in the set of single-strand impedances to be judged are compared with the reference single-strand conductor-to-ground impedance in turn. When the single-strand impedance to be judged is greater than the reference single-strand conductor-to-ground impedance, the damage detection sub-result of the single-strand impedance to be judged is determined to be damaged based on the conductor-to-ground state judgment relationship data. When the single-strand impedance to be judged is less than or equal to the reference single-strand conductor-to-ground impedance, the damage detection sub-result of the single-strand impedance to be judged is determined to be damaged without damage based on the conductor-to-ground state judgment relationship data. The damage detection result is obtained based on the damage detection sub-results corresponding to all the single-strand impedances in the set of single-strand impedances to be judged.

7. The method for detecting damage to the ground wire inside the suspension clamp according to claim 6, characterized in that, Also includes: The number of damaged strands is obtained based on the damage detection results, and a subset of damaged single-strand impedances is selected from the set of single-strand impedances to be judged based on the damage detection results. Based on the damaged single-strand impedance subset, the average reference impedance, and the number of damaged strands, the average impedance change rate of the damaged strands is obtained; The total number of shares to be judged is determined based on the conductor / ground wire segment to be judged. A comprehensive damage index is obtained based on the total number of shares to be judged, the number of damaged shares, and the average impedance change rate of the damaged shares.

8. A device for detecting damage to the ground wire inside a suspension clamp, characterized in that, include: The sample segment acquisition module is used to acquire the normal conductor segment and the damaged conductor segment of the sample conductor. The basic data acquisition module is used to determine the normal conductor and ground wire data of the sample based on the normal conductor and ground wire section of the sample, and to determine the damaged conductor and ground wire data of the sample based on the damaged conductor and ground wire section of the sample. The impedance data acquisition module is used to obtain the normal impedance of a single strand of a sample and the damaged impedance of a single strand of a sample based on a preset conductor impedance algorithm, the normal conductor data of the sample, and the damaged conductor data of the sample. The relational data construction module is used to construct relational data for judging the state of the conductor and ground wire based on the normal impedance of the sample single strand and the damaged impedance of the sample single strand. The detection section division module is used to acquire the conductor and ground wire to be detected, and to determine the reference conductor and ground wire section and the conductor and ground wire section to be judged based on the conductor and ground wire to be detected; The module for obtaining the set of single-strand impedances to be judged is used to obtain the set of single-strand impedances to be judged for the section of conductor to be judged, and to obtain the reference single-strand conductor impedance for the section of reference conductor to be judged. The damage detection result acquisition module is used to determine the damage detection result of the conductor-to-ground wire segment to be judged based on the conductor-to-ground wire state judgment relationship data, the set of single-strand impedances to be judged, and the reference single-strand conductor-to-ground wire impedance.

9. A terminal device, characterized in that, The method includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, it implements the method for detecting damage to the ground wire inside the suspension clamp as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, include: A stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform the method for detecting damage to the ground wire inside the suspension clamp as described in any one of claims 1-7.

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