Method and device for confirming defects of cable component by using harmonic current, computer equipment, readable storage medium and program product

Abstract

The invention relates to a method and a device for confirming defects of cable parts by using harmonic current, computer equipment, a computer readable storage medium and a computer program product. The method comprises the following steps: acquiring first structure size data and first material parameter data of a to-be-processed cable component, and constructing a to-be-processed cable component model corresponding to the to-be-processed cable component according to the first structure size data and the first material parameter data; applying a sine alternating current to the to-be-processed cable part model, and obtaining a first cable induction current corresponding to the sine alternating current at the preset position; performing Fourier transform on the first cable induction current to obtain a first harmonic current component included in the first cable induction current; and determining the amplitude of the first harmonic current component, and determining the target defect type of the defect according to the amplitude of the first harmonic current component. By adopting the method, the defect confirmation accuracy can be improved.

Description

Technical Field

[0001] The present application relates to the field of smart grid technology, and in particular to a method, apparatus, computer equipment, computer-readable storage medium, and computer program product for confirming cable component defects using harmonic currents. Background Art

[0002] During long-term operation, cable components are inevitably exposed to external factors such as electricity, heat, mechanics, external force, and moisture, which may cause defects, damage, and aging of cable components. It is necessary to accurately determine the defects of cable components so as to maintain the defective cable components.

[0003] In the related art, the proportion of harmonic components is generally used to determine the type of defects in cable components. However, the propagation characteristics and propagation process of cable harmonic abnormality signals are not fully understood, and there is a lack of effective evaluation methods for harmonic abnormality signals. Summary of the invention

[0004] Based on this, it is necessary to provide a method, device, computer equipment, computer-readable storage medium and computer program product for confirming cable component defects using harmonic currents, which can accurately determine defects in response to the above technical problems.

[0005] In a first aspect, the present application provides a method for confirming cable component defects using harmonic currents, comprising:

[0006] Acquire first structural dimension data and first material parameter data of the cable component to be processed, and construct a cable component model to be processed corresponding to the cable component to be processed according to the first structural dimension data and the first material parameter data;

[0007] Adding an alternating current sinusoidal current to the cable component model to be processed, and obtaining a first cable induced current corresponding to the sinusoidal alternating current at a preset position;

[0008] Performing Fourier transformation on the first cable induced current to obtain a first harmonic current component included in the first cable induced current;

[0009] The amplitude of the first harmonic current component is determined, and a target defect type of the defect is determined based on the amplitude of the first harmonic current component.

[0010] In one embodiment, a target defect type of a defect is determined based on the amplitude of a first harmonic current component, including: determining a first current attenuation rate based on the amplitude of the first harmonic current component and preset distance information corresponding to a preset position; based on the first current attenuation rate, querying a pre-generated correspondence between the current attenuation rate and the defect type to determine the target defect type corresponding to the first current attenuation rate.

[0011] In one of the embodiments, before determining the target defect type of the defect based on the amplitude of the first harmonic current component, the method also includes: obtaining second structural dimension data and second material parameter data of the test cable component, and constructing a test cable component model corresponding to the test cable component based on the second structural dimension data and the second material parameter data; adding a preset defect and a sinusoidal alternating current to the test cable component model, and obtaining a second cable induced current corresponding to the sinusoidal alternating current at a preset position; performing Fourier transform on the second cable induced current to obtain a second harmonic current component; determining a third harmonic current component corresponding to the second harmonic current component based on the second harmonic current component and the preset position; generating a second current attenuation rate based on the second harmonic current component and the third harmonic current component; and setting a preset defect type corresponding to the preset defect to correspond to the second current attenuation rate.

[0012] In one embodiment, generating a second current attenuation rate based on the second harmonic current component and the third harmonic current component includes: determining an equivalent circuit corresponding to a test cable component; determining a cable primary parameter value of the test cable component corresponding to the equivalent circuit based on the second structural dimension data and the second material parameter data; determining an angular frequency based on the second harmonic current component; determining a harmonic current attenuation characteristic corresponding to the harmonic current component based on the angular frequency and the cable primary parameter value; determining the second current attenuation rate based on the amplitude of the second harmonic current component, the amplitude of the third harmonic current component and the harmonic current attenuation characteristic.

[0013] In an optional embodiment, the second structural dimension data includes the cable core radius and the metal shielding layer inner diameter, the second material parameter data includes the vacuum permeability, the cable core conductivity, the metal shielding layer conductivity, the dielectric constant of the medium and the cable insulation medium conductivity, and the cable primary parameters include the conductor effective resistance value, the loop inductance value, the capacitance value and the insulation conductance value; according to the second structural dimension data and the second material parameter data, the cable primary parameter value of the test cable component corresponding to the equivalent circuit is determined, including: according to the vacuum permeability, angular frequency, the cable core conductivity, the metal shielding layer conductivity, the cable core radius and the metal shielding layer inner diameter, the conductor effective resistance value and the loop inductance value are determined; according to the dielectric constant, the cable core radius and the metal shielding layer inner diameter, the capacitance value is determined; according to the cable insulation medium conductivity, the cable core radius and the metal shielding layer inner diameter, the capacitance and the insulation conductance value are determined.

[0014] In one embodiment, the harmonic current attenuation characteristics include a phase shift constant, an attenuation constant and a transmission constant. The harmonic current attenuation characteristics corresponding to the harmonic current component are determined according to the angular frequency and the primary parameters of the cable, including: determining the phase shift constant according to the loop inductance, capacitance and angular frequency; determining the attenuation constant according to the effective resistance, capacitance, insulation conductance and loop inductance of the conductor; determining the transmission constant according to the phase shift constant, attenuation constant and angular frequency; generating a current attenuation rate according to the amplitude of the second harmonic current component, the amplitude of the third harmonic current component and the harmonic current attenuation characteristics, including: generating a second current attenuation rate according to the amplitude of the second harmonic current component, the amplitude of the third harmonic current component and the transmission constant.

[0015] In a second aspect, the present application also provides a device for confirming cable component defects using harmonic currents, comprising:

[0016] A model building module is used to obtain the structural dimension data and material parameter data of the cable component to be processed, and to build a cable component model to be processed corresponding to the cable component to be processed according to the structural dimension data and the material parameter data;

[0017] An induced current acquisition module, used for adding a sinusoidal alternating current to the cable component model to be processed, and acquiring a first cable induced current corresponding to the sinusoidal alternating current at a preset position;

[0018] A harmonic current acquisition module is used to perform Fourier transform on the cable induced current to obtain the harmonic current components included in the cable induced current;

[0019] The defect type determination module is used to determine the amplitude of the harmonic current component and determine the target defect type of the defect according to the amplitude of the harmonic current component.

[0020] In a third aspect, the present application further provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method embodiments when executing the computer program.

[0021] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which implements the steps of the above-mentioned method embodiments when the computer program is executed by a processor.

[0022] In a fifth aspect, the present application also provides a computer program product, including a computer program, which implements the steps of the above-mentioned method embodiments when executed by a processor.

[0023] The above-mentioned cable component defect confirmation method, device, computer equipment, computer readable storage medium and computer program product using harmonic current can effectively improve the accuracy of defect confirmation by confirming the defect type and distance based on the amplitude of the harmonic current component and the current attenuation characteristics. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of a flow chart of a cable component defect confirmation method in one embodiment;

[0026] Figure 2 A schematic diagram of a flow chart of a cable component confirmation method in another embodiment;

[0027] Figure 3 A structural block diagram of a cable component confirmation device in one embodiment;

[0028] Figure 4 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] In one embodiment, Figure 1 As shown, a method for confirming cable component defects by using harmonic current is provided. This embodiment uses the method applied to a terminal as an example. It can be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0031] Step 102: acquiring first structural dimension data and first material parameter data of the cable component to be processed, and constructing a cable component model to be processed corresponding to the cable component to be processed according to the first structural dimension data and the first material parameter data.

[0032] Optionally, the cable components to be processed include cables and accessory insulating components. Exemplarily, the accessory insulating components may be heat shrink tubes, stress tubes, filling glue, sealants, and the like.

[0033] The first structural dimension data is used to characterize the size of the cable component to be processed. Optionally, the first structural dimension data includes but is not limited to the cable core radius and the inner diameter of the metal shielding layer.

[0034] The second material parameter data is used to characterize the material-related parameters of the cable component to be processed. Optionally, the second material parameter data may include but is not limited to vacuum permeability, cable core conductivity, metal shielding layer conductivity, dielectric constant and cable insulation medium conductivity.

[0035] In one embodiment, a defect confirmation instruction to be processed may be obtained, and defect confirmation may be processed according to the defect confirmation instruction to be processed. Optionally, the defect confirmation instruction to be processed includes first structural dimension data, first material parameter data and other related contents of the cable component to be processed, so that after the defect confirmation instruction is obtained, the first structural dimension data, first material parameter data and other related contents of the cable component to be processed may be extracted from the defect confirmation instruction to be processed.

[0036] Optionally, the defect confirmation instruction can be generated by a user operating a terminal. For example, a defect confirmation instruction generating software is provided on the terminal, and the user generates the defect confirmation instruction using the defect confirmation instruction generating software. By way of example, the first structural dimension, first material parameter data and other contents of the cable component to be processed are input into the defect confirmation instruction generating software, and the defect confirmation instruction generating software generates the defect confirmation instruction to be processed according to the input first structural dimension and first material parameter data of the cable component to be processed.

[0037] In an optional embodiment, after obtaining the first structural dimension data and the first material parameter data of the cable component to be processed, the first structural dimension data and the first material parameter data are input into the model generation software, and the model generation software generates the model of the cable component to be processed according to the first structural dimension data and the first material parameter data. For example, the model of the cable component to be processed is generated according to the first structural dimension data and the first material parameter data using finite element simulation software.

[0038] Step 104: Add a sinusoidal alternating current to the cable component model to be processed, and obtain a first cable induced current corresponding to the sinusoidal alternating current at a preset position.

[0039] Step 106: Perform Fourier transform on the cable induced current to obtain a first harmonic current component included in the cable induced current.

[0040] It can be understood that when there are defects on the cable components, when the waveform current is applied, the applied waveform current will inevitably cause magnetic field distortion when passing through the defect, generating a harmonic signal, so that it is possible to determine whether the cable components have defects by obtaining the harmonic current components.

[0041] It can be understood that when there are defects in the cable components, if a sinusoidal AC current is applied to the cable components, there will be harmonic currents in the grounding current, and the grounding current can be obtained as the cable induced current, and the cable induced current can be used to confirm the defects.

[0042] In one embodiment, after the cable induced current is acquired, Fourier transform may be performed on the cable induced current to determine whether there is a harmonic current component in the cable induced current.

[0043] In an optional embodiment, the inductive current may be obtained at a preset position. Optionally, the preset position may be 10m, 20m or 30m.

[0044] Optionally, when there is a first harmonic current component in the first cable induced current, it can be considered that the cable component to be processed has defects, and when there is no first harmonic current component, it can be considered that the cable component to be processed has no defects.

[0045] In one embodiment, when there is a first harmonic current component and it is believed that the cable component to be processed has defects, the acquired first harmonic current component can be used to confirm the defect type, the defect location, and other processing.

[0046] Step 108, determining the amplitude of the first harmonic current component, and determining the target defect type of the defect according to the amplitude of the first harmonic current component.

[0047] The defect type is used to characterize the classification of the defect. Optionally, the defect type may include but is not limited to semi-conductive shearing, scratches, and air gaps.

[0048] In an optional embodiment, after the first harmonic current component is acquired, the amplitude of the first harmonic current component may be determined to determine the defect type according to the amplitude of the harmonic current component.

[0049] Optionally, the first current attenuation rate can be determined based on the amplitude of the first harmonic current component and the preset distance information corresponding to the preset position; based on the first current attenuation rate, the correspondence between the pre-generated current attenuation rate and the defect type is queried to determine the target defect type corresponding to the first current attenuation rate.

[0050] Among them, the current decay rate is used to characterize the degree of current decay.

[0051] In one embodiment, a correspondence between the current decay rate and the defect type can be pre-generated so that when the defect type needs to be determined, the correspondence can be queried to determine the defect type. Optionally, the pre-generated correspondence between the current decay rate and the defect type includes: obtaining second structural dimension data and second material parameter data of the test cable component, and constructing a test cable component model corresponding to the test cable component based on the second structural dimension data and the second material parameter data; adding a preset defect and a sinusoidal alternating current to the test cable component model, and obtaining a second cable induced current corresponding to the sinusoidal alternating current at a preset position; performing Fourier transform on the second cable induced current to obtain a second harmonic current component; determining a third harmonic current component corresponding to the second harmonic current component based on the second harmonic current component and the preset position; generating a second current decay rate based on the second harmonic current component and the third harmonic current component; and setting a preset defect type corresponding to the preset defect to correspond to the second current decay rate.

[0052] In one embodiment, historical cable component structural dimensions, historical material parameter data, defects generated on historical cables, defect types corresponding to the defects, and defect locations during actual use can be obtained, and test sample data can be generated based on the acquired historical cable component structural dimensions, historical material parameter data, defects generated on historical cables, defect types corresponding to the defects, and defect locations.

[0053] Optionally, a set of test sample data may be obtained from the sample data, wherein the set of test sample data includes a second structural dimension of a test cable component, second material parameter data, a defect type, and a sample defect position of the defect on the cable component.

[0054] In one embodiment, after a set of test sample data is acquired, a test cable component model is generated according to the second cable component structure dimensions and second sample material parameter data included in the set of test sample data.

[0055] Optionally, a first defect is added to the test cable component model, and the first defect is added at a sample defect position corresponding to the defect type of the first defect, to generate a sample cable component model including defects, and then a sinusoidal alternating current is applied, and a second cable induced current corresponding to the sinusoidal alternating current at a preset position is obtained, and the second cable induced current is Fourier transformed to obtain a second harmonic current component.

[0056] Optionally, the calculation formula for Fourier transform of the sample cable induced current can be:

[0057]

[0058] Total harmonic current effective value I h for:

[0059]

[0060] The proportion of each harmonic in all harmonics is:

[0061] H=I n / I h *100% (3)

[0062] The total harmonic distortion is:

[0063]

[0064] Optionally, a third harmonic current component corresponding to the second harmonic current component may be determined according to the second harmonic current component and the preset position. Exemplarily, the corresponding relationship between the third harmonic current component and the second harmonic current component may be as shown in the following formula (5):

[0065] |I0|=|I i |e -γl (5)

[0066] Where, I0 is the amplitude of the third harmonic current component, I i is the amplitude of the second harmonic current component, l is the distance between the preset position and the position where the sinusoidal AC current is applied, and γ is the transmission constant.

[0067] In one embodiment, after I0 is obtained according to formula (5), I0 and I i , the second current decay rate can be determined. Exemplarily, the calculation formula of the second current decay rate can be shown as formula (6):

[0068]

[0069] Optionally, after determining the second current decay rate, the second current decay rate may be set corresponding to the defect type and the defect position corresponding to the defect type.

[0070] In an optional embodiment, a second defect is added to the test cable component model. The second defect is added at a sample defect position corresponding to the defect type of the second defect, and a sample cable component model including a defect is generated. Then, a sinusoidal alternating current is applied, and the cable induced current corresponding to the sinusoidal alternating current at a preset position is obtained. The cable induced current is Fourier transformed to obtain a sample harmonic current component, and the current attenuation rate corresponding to the second defect can be calculated. The current attenuation rate is set corresponding to the defect type and defect position of the second defect. The specific calculation process can be seen in formulas (1)-(6).

[0071] In one embodiment, if there are other defects, other defects can be added to the test cable component model. The other defects are added at the sample defect positions corresponding to the defect types of other defects to generate a sample cable component model including defects. Then, a sinusoidal alternating current is applied, and the cable induced current corresponding to the sinusoidal alternating current at a preset position is obtained. The sample cable induced current is Fourier transformed to obtain a sample harmonic current component, and the current attenuation rate corresponding to the defect can be calculated. The current attenuation rate is set corresponding to the defect type and defect position until there are no other defects. The specific calculation process can be seen in formulas (1)-(6).

[0072] In an optional embodiment, when setting the correspondence between the amplitude of the harmonic current component and the defect type, multiple sinusoidal alternating currents can be set and applied to the test cable component model with defects, so that a more accurate correspondence between the amplitude of the harmonic current component and the defect type can be obtained through multiple tests, thereby improving the accuracy of defect confirmation.

[0073] In one embodiment, when generating the correspondence between the defect type and the current attenuation rate, when obtaining the inductively induced current at a preset position, multiple preset positions can be set to obtain the inductively induced current corresponding to each preset position, and the correspondence between the current attenuation rate and the defect type at each preset position is calculated and determined.

[0074] In one embodiment, generating a second current attenuation rate based on the second harmonic current component and the third harmonic current component includes: determining an equivalent circuit corresponding to a test cable component; determining a cable primary parameter value of the test cable component corresponding to the equivalent circuit based on the second structural dimension data and the second material parameter data; determining an angular frequency based on the second harmonic current component; determining a harmonic current attenuation characteristic corresponding to the harmonic current component based on the angular frequency and the cable primary parameter value; generating a second current attenuation rate based on the amplitude of the second harmonic current component, the amplitude of the third harmonic current component, and the harmonic current attenuation characteristic.

[0075] Optionally, the primary parameters of the cable may include but are not limited to the effective resistance value of the conductor, the loop inductance value, the capacitance value and the insulation conductance value.

[0076] In an optional embodiment, the effective resistance value of the conductor and the loop inductance value can be determined according to the vacuum magnetic permeability, angular frequency, cable core conductivity, metal shielding layer conductivity, cable core radius and metal shielding layer inner diameter. Optionally, the resistance calculation formula can be:

[0077]

[0078] Where μ0 is the vacuum magnetic permeability; ω is the angular frequency; rc is the cable core radius; r s is the inner diameter of the metal shielding layer; ρ c is the cable core conductivity; ρ s is the conductivity of the metal shielding layer.

[0079] Optionally, the loop inductance calculation formula may be:

[0080]

[0081] In one embodiment, the capacitance value may be determined based on the dielectric constant of the medium, the radius of the cable core, and the inner diameter of the metal shielding layer. Optionally, the calculation formula may be:

[0082]

[0083] Among them, ε is the dielectric constant of the medium.

[0084] In one embodiment, the insulation conductivity value can be determined by determining the capacitance according to the conductivity of the cable insulation medium, the radius of the cable core and the inner diameter of the metal shielding layer. Optionally, the calculation formula of the insulation conductivity value can be:

[0085]

[0086] Among them, σ is the conductivity of the cable insulation medium.

[0087] In one embodiment, the harmonic current attenuation characteristics may include, but are not limited to, a phase shift constant, an attenuation constant, and a transmission constant.

[0088] Optionally, the phase shift constant β can be determined based on the loop inductance, capacitance and angular frequency. The calculation formula can be:

[0089]

[0090] Optionally, the attenuation constant α can be determined based on the effective resistance value, capacitance value, insulation conductivity value and loop inductance value of the conductor. The calculation formula can be:

[0091]

[0092] Optionally, the transmission constant γ can be determined based on the phase shift constant, the attenuation constant and the angular frequency. The calculation formula can be:

[0093]

[0094] In one embodiment, after determining the first harmonic current component, the amplitude of the first harmonic current component can be determined, and according to the amplitude of the first harmonic current component and the preset distance information, the fourth harmonic current component corresponding to the first harmonic current component can be determined, and the first current attenuation rate is generated according to the fourth harmonic current component and the first harmonic current component. Exemplarily, the specific calculation formula can be as shown in formulas (1)-(13), which will not be repeated again.

[0095] Optionally, after determining the first current decay rate, the correspondence between the pre-generated current decay rate and the defect type is obtained, and the correspondence is queried using the first current decay rate to obtain the defect type corresponding to the first current decay rate, which is the target defect type.

[0096] In the above-mentioned method for confirming cable component defects using harmonic current, the structural dimension data and material parameter data of the cable component to be processed are obtained, and based on the structural dimension data and material parameter data, a cable component model to be processed corresponding to the cable component to be processed is constructed, a sinusoidal alternating current is applied to the cable component model to be processed, and the cable induced current corresponding to the sinusoidal alternating current is obtained, and the cable induced current is Fourier transformed to obtain the harmonic current component included in the cable induced current, determine the amplitude of the harmonic current component, and determine the target defect type of the defect based on the amplitude of the harmonic current component. Confirming the defect type and distance based on the amplitude and attenuation characteristics of the harmonic current component can effectively improve the accuracy of defect confirmation.

[0097] In an exemplary embodiment, Figure 2 As shown, a method for confirming cable component defects by using harmonic current is provided. This embodiment uses the method applied to a terminal as an example. It can be understood that the method can also be applied to a server, and can also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0098] Step 202: Acquire second structural dimension data and second material parameter data of the test cable component, and construct a test cable component model corresponding to the test cable component according to the second structural dimension data and the second material parameter data.

[0099] Optionally, the structural dimension data include the cable core radius and the metal shielding layer inner diameter, and the material parameter data include vacuum permeability, cable core conductivity, metal shielding layer conductivity, dielectric constant and cable insulation medium conductivity.

[0100] Step 204: Add a preset defect and a sinusoidal alternating current to the test cable component model, and obtain a second cable induced current corresponding to the sinusoidal alternating current at a preset position.

[0101] Step 206: Perform Fourier transform on the second cable induced current to obtain a second harmonic current component.

[0102] Step 208: Determine a third harmonic current component corresponding to the second harmonic current component according to the second harmonic current component and the preset position.

[0103] Step 210: determine the equivalent circuit corresponding to the test cable component.

[0104] Step 212, determining the effective resistance value of the conductor and the loop inductance value according to the vacuum magnetic permeability, angular frequency, the conductivity of the cable core, the conductivity of the metal shielding layer, the radius of the cable core and the inner diameter of the metal shielding layer.

[0105] Step 214, determining the capacitance value according to the dielectric constant of the medium, the radius of the cable core and the inner diameter of the metal shielding layer.

[0106] Step 216, determining the insulation conductivity value by capacitance according to the conductivity of the cable insulation medium, the radius of the cable core and the inner diameter of the metal shielding layer.

[0107] Step 218: determining the angular frequency according to the second harmonic current component.

[0108] Step 220, determining a phase shift constant according to the loop inductance, capacitance and angular frequency.

[0109] Step 222, determining the attenuation constant according to the effective resistance value, capacitance value, insulation conductance value and loop inductance value of the conductor.

[0110] Step 224, determining a transmission constant according to the phase shift constant, the attenuation constant and the angular frequency.

[0111] Step 226: Generate a second current attenuation rate according to the amplitude of the second harmonic current component, the amplitude of the third harmonic current component, and the transmission constant.

[0112] Step 228: Set the preset defect type corresponding to the preset defect and the second current decay rate accordingly.

[0113] Step 230, obtaining first structural dimension data and first material parameter data of the cable component to be processed, and constructing a cable component model to be processed corresponding to the cable component to be processed according to the first structural dimension data and the first material parameter data.

[0114] Step 232: Add a sinusoidal alternating current to the cable component model to be processed, and obtain a first cable induced current corresponding to the sinusoidal alternating current at a preset position.

[0115] Step 234: Perform Fourier transform on the first cable induced current to obtain a first harmonic current component included in the first cable induced current.

[0116] Step 236: Determine a first current attenuation rate according to the amplitude of the first harmonic current component and the preset distance information.

[0117] The preset distance information is the distance information corresponding to the preset position.

[0118] Step 238: According to the first current decay rate, query the pre-generated correspondence between the current decay rate and the defect type to determine the target defect type corresponding to the first current decay rate.

[0119] In this embodiment, the defect type and distance are confirmed based on the amplitude and attenuation characteristics of the harmonic current components, which can effectively improve the accuracy of defect confirmation.

[0120] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0121] Based on the same inventive concept, the embodiment of the present application also provides a cable component defect confirmation device for implementing the cable component defect confirmation method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more cable component defect confirmation device embodiments provided below can refer to the limitations of the cable component defect confirmation method above, and will not be repeated here.

[0122] In an exemplary embodiment, Figure 3 As shown, a device 300 for confirming cable component defects by using harmonic current is provided, comprising: a model building module 302, an induced current acquisition module 304, a harmonic current acquisition module 306 and a defect type determination module 308, wherein:

[0123] The model building module 302 is used to obtain first structural dimension data and first material parameter data of the cable component to be processed, and build a cable component model to be processed corresponding to the cable component to be processed according to the first structural dimension data and the first material parameter data.

[0124] The induced current acquisition module 304 is used to add a sinusoidal alternating current to the cable component model to be processed, and to acquire a first cable induced current corresponding to the sinusoidal alternating current at a preset position.

[0125] The harmonic current acquisition module 306 is used to perform Fourier transform on the first cable induced current to obtain a first harmonic current component included in the first cable induced current.

[0126] The defect type determination module 308 is used to determine the amplitude of the first harmonic current component and determine the target defect type of the defect according to the amplitude of the first harmonic current component.

[0127] In one embodiment, the defect type determination module 308 is also used to determine the first current attenuation rate based on the amplitude of the first harmonic current component and the preset distance information corresponding to the preset position; based on the first current attenuation rate, query the correspondence between the pre-generated current attenuation rate and the defect type to determine the target defect type corresponding to the first current attenuation rate.

[0128] In one embodiment, the device for confirming cable component defects using harmonic current also includes a pre-generation module, which is used to obtain second structural dimension data and second material parameter data of the test cable component, and construct a test cable component model corresponding to the test cable component based on the second structural dimension data and the second material parameter data; add a preset defect and a sinusoidal alternating current to the test cable component model, and obtain a second cable induced current corresponding to the sinusoidal alternating current at a preset position; perform Fourier transform on the second cable induced current to obtain a second harmonic current component; determine a third harmonic current component corresponding to the second harmonic current component based on the second harmonic current component and the preset position; generate a second current attenuation rate based on the second harmonic current component and the third harmonic current component; and set a preset defect type corresponding to the preset defect to correspond to the second current attenuation rate.

[0129] In one of the embodiments, the pre-generation module is also used to determine the equivalent circuit corresponding to the test cable component; determine the cable primary parameter value of the cable component corresponding to the equivalent circuit based on the second structural dimension data and the second material parameter data; determine the angular frequency based on the second harmonic current component; determine the harmonic current attenuation characteristic corresponding to the second harmonic current component based on the angular frequency and the cable primary parameter value; generate the second current attenuation rate based on the amplitude of the second harmonic current, the amplitude of the third harmonic current component and the harmonic current attenuation characteristic.

[0130] In an optional embodiment, the second structural dimension data includes the cable core radius and the metal shielding layer inner diameter, the second material parameter data includes vacuum permeability, cable core conductivity, metal shielding layer conductivity, dielectric constant and cable insulation medium conductivity, and the cable primary parameters include conductor effective resistance, loop inductance, capacitance and insulation conductance; the pre-generation module is also used to determine the conductor effective resistance and loop inductance according to vacuum permeability, angular frequency, cable core conductivity, metal shielding layer conductivity, cable core radius and metal shielding layer inner diameter; determine the capacitance according to the dielectric constant, cable core radius and metal shielding layer inner diameter; determine the capacitance and insulation conductance according to the cable insulation medium conductivity, cable core radius and metal shielding layer inner diameter.

[0131] In an optional embodiment, the harmonic current attenuation characteristics include a phase shift constant, an attenuation constant and a transmission constant. The defect location determination module is further used to determine the phase shift constant based on the loop inductance value, the capacitance value and the angular frequency; determine the attenuation constant based on the conductor effective resistance value, the capacitance value, the insulation conductance value and the loop inductance value; and determine the transmission constant based on the phase shift constant, the attenuation constant and the angular frequency.

[0132] Each module in the above-mentioned device for confirming cable component defects by using harmonic current can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each of the above modules.

[0133] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 4As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. When the computer program is executed by the processor, a method for confirming defects of a cable component is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0134] Those skilled in the art will understand that Figure 4 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0135] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0136] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0137] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0138] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0139] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0140] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0141] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for confirming cable component defects using harmonic current, characterized in that: The method comprises: Acquire first structural dimension data and first material parameter data of the cable component to be processed, and construct a cable component model to be processed corresponding to the cable component to be processed according to the first structural dimension data and the first material parameter data; Adding a sinusoidal alternating current to the cable component model to be processed, and obtaining a first cable induced current corresponding to the sinusoidal alternating current at a preset position; Performing Fourier transformation on the first cable induced current to obtain a first harmonic current component included in the first cable induced current; The amplitude of the first harmonic current component is determined, and the target defect type of the defect is determined according to the amplitude of the first harmonic current component.

2. The method according to claim 1, characterized in that: The step of determining the target defect type of the defect according to the amplitude of the first harmonic current component includes: Determining a first current attenuation rate according to the amplitude of the first harmonic current component and the preset distance information corresponding to the preset position; According to the first current decay rate, the pre-generated correspondence between the current decay rate and the defect type is queried to determine the target defect type corresponding to the first current decay rate.

3. The method according to claim 1, characterized in that Before determining the target defect type of the defect according to the amplitude of the first harmonic current component, the method further includes: Acquire second structural dimension data and second material parameter data of a test cable component, and construct a test cable component model corresponding to the test cable component according to the second structural dimension data and the second material parameter data; Adding a preset defect and the sinusoidal alternating current to the test cable component model, and obtaining a second cable induced current corresponding to the sinusoidal alternating current at the preset position; Performing Fourier transformation on the second cable induced current to obtain a second harmonic current component; Determining a third harmonic current component corresponding to the second harmonic current component according to the second harmonic current component and the preset position; generating a second current attenuation rate according to the second harmonic current component and the third harmonic current component; The preset defect type corresponding to the preset defect is set corresponding to the second current decay rate.

4. The method according to claim 3, characterized in that The step of generating a second current attenuation rate according to the second harmonic current component and the third harmonic current component comprises: Determining an equivalent circuit corresponding to the test cable component; Determine, according to the second structural dimension data and the second material parameter data, a cable primary parameter value of the test cable component corresponding to the equivalent circuit; determining an angular frequency according to the second harmonic current component; Determining a harmonic current attenuation characteristic corresponding to a second harmonic current component according to the angular frequency and the primary parameter value of the cable; The second current attenuation rate is generated according to the amplitude of the second harmonic current component, the amplitude of the third harmonic current component, and the harmonic current attenuation characteristic.

5. The method according to claim 4, characterized in that The second structural dimension data includes the cable core radius and the metal shielding layer inner diameter, the second material parameter data includes the vacuum permeability, the cable core conductivity, the metal shielding layer conductivity, the dielectric constant and the cable insulation medium conductivity, and the cable primary parameter includes the conductor effective resistance value, the loop inductance value, the capacitance value and the insulation conductance value; the determining the cable primary parameter value of the test cable component corresponding to the equivalent circuit according to the second structural dimension data and the second material parameter data includes: Determine the effective resistance value of the conductor and the loop inductance value according to the vacuum magnetic permeability, the angular frequency, the electrical conductivity of the cable core, the electrical conductivity of the metal shielding layer, the radius of the cable core and the inner diameter of the metal shielding layer; Determining the capacitance value according to the dielectric constant of the medium, the radius of the cable core and the inner diameter of the metal shielding layer; The capacitance is determined according to the electrical conductivity of the cable insulation medium, the radius of the cable core and the inner diameter of the metal shielding layer to determine the insulation conductance value.

6. The method according to claim 5, characterized in that The harmonic current attenuation characteristics include a phase shift constant, an attenuation constant, and a transmission constant. The determining of the harmonic current attenuation characteristics corresponding to the harmonic current component according to the angular frequency and the primary parameter of the cable includes: Determining a phase shift constant according to the loop inductance, the capacitance and the angular frequency; Determining an attenuation constant according to the effective resistance value of the conductor, the capacitance value, the insulation conductance value and the loop inductance value; determining a transmission constant according to the phase shift constant, the attenuation constant and the angular frequency; The generating the current attenuation rate according to the amplitude of the second harmonic current component, the amplitude of the third harmonic current component and the harmonic current attenuation characteristic comprises: The second current attenuation rate is generated according to the amplitude of the second harmonic current component, the amplitude of the third harmonic current component, and the transmission constant.

7. A device for confirming cable component defects using harmonic current, characterized in that: The device comprises: A model building module, used for acquiring first structural dimension data and first material parameter data of a cable component to be processed, and building a cable component model to be processed corresponding to the cable component to be processed according to the first structural dimension data and the first material parameter data; An induced current acquisition module, used for adding a cable sinusoidal alternating current to the cable component model to be processed, and acquiring a first cable induced current corresponding to the sinusoidal alternating current at a preset position; a harmonic current acquisition module, configured to perform Fourier transform on the first cable induced current to obtain a first harmonic current component included in the first cable induced current; A defect type determination module is used to determine the amplitude of the first harmonic current component and determine the target defect type of the defect according to the amplitude of the first harmonic current component.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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