Method and device for detecting heat resistance of cable material

Abstract

The invention relates to the technical field of cable performance testing, and discloses a cable material heat resistance detection method and device, and the method comprises the steps: obtaining the construction information of a target cable, carrying out the material analysis, obtaining the hierarchical information of the cable, determining a to-be-detected position and a corresponding detection scheme based on the material hierarchical information, carrying out the detection operation, and collecting data, according to the method, through digital simulation and heat diffusion analysis, the heat resistance characteristics of all layers of materials of the cable are accurately recognized, the detection position and scheme are optimized, the detection precision and comprehensiveness are improved, and compared with a traditional method, the method has the advantages that the detection accuracy is improved, and the detection efficiency is improved. According to the method, the detection time and cost can be effectively reduced, the safety and reliability of the cable in a high-temperature environment are improved, and the problem that in the prior art, the efficiency of overall heating of the cable to detect the heat resistance is low is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of cable performance testing, and in particular to a method and device for testing the heat resistance of cable materials. Background Art

[0002] As an important power transmission and communication infrastructure, the safety and reliability of cables in high-temperature working environments are crucial. In industries such as power, communications, and transportation, cables are exposed to high-temperature environments for a long time. Poor heat resistance may cause cable aging, damage, and even cause safety accidents such as fires. Therefore, accurately evaluating the heat resistance of cables in high-temperature environments is of great significance to ensuring the safe operation of power systems and other electrical equipment.

[0003] At present, the heat resistance performance evaluation method of cables mainly relies on physical experiments. The heat resistance performance of cables is judged by exposing cable samples to a high temperature environment and heating the entire cable to test the changes in its physical properties at different temperatures. This detection method requires continuous heating, consumes a lot of resources, and has low detection efficiency. Summary of the invention

[0004] The object of the present invention is to provide a method and device for detecting the heat resistance of cable materials, aiming to solve the problem of low efficiency in the prior art of heating the cable as a whole to detect the heat resistance.

[0005] The present invention is implemented in this way. In a first aspect, the present invention provides a method for detecting heat resistance of cable materials, comprising: Acquire the construction information of the target cable, and perform material analysis on the construction information to obtain the cable material level information of the target cable; wherein the cable material level information includes conductor material information, insulation material information, sheath material information and filling material information; Analyzing the heat resistance detection scheme of the target cable according to the cable material level information to obtain a plurality of positions to be tested of the target cable and a detection scheme corresponding to each of the positions to be tested; According to each of the detection schemes, corresponding detection operations are respectively applied to each to-be-tested position of the target cable, and detection data are collected from the target cable receiving the detection operation, so as to obtain a heat resistance detection set of the target cable; A comprehensive analysis of the heat resistance performance of the target cable is performed based on the heat resistance detection set to obtain the heat resistance performance characteristics of the target cable.

[0006] In a second aspect, the present invention provides a device for detecting heat resistance of cable materials, which is used to implement a method for detecting heat resistance of cable materials as described in any one of the first aspects.

[0007] The present invention provides a method for detecting heat resistance of cable materials, which has the following beneficial effects: The present invention obtains the structural information of the target cable and performs material analysis to obtain the layer information of the cable, determines the position to be tested and the corresponding detection scheme based on the material layer information, applies the detection operation and collects data to obtain a heat resistance detection set, and comprehensively analyzes the heat resistance performance characteristics of the target cable based on the detection data. This method accurately identifies the heat resistance characteristics of each layer of the cable material through digital simulation and heat diffusion analysis, optimizes the detection position and scheme, and improves the detection accuracy and comprehensiveness. Compared with traditional methods, this method can effectively reduce detection time and cost, improve the safety and reliability of the cable in a high temperature environment, and solves the problem of low efficiency in the prior art of heating the cable as a whole to detect heat resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the steps of a method for detecting heat resistance of cable materials provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the present invention.

[0010] The implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0011] Reference Figure 1 As shown, a preferred embodiment of the present invention is provided.

[0012] In a first aspect, the present invention provides a method for detecting heat resistance of a cable material, comprising: S1: Acquire the construction information of the target cable, and perform material analysis on the construction information to obtain the cable material level information of the target cable; wherein the cable material level information includes conductor material information, insulation material information, sheath material information and filling material information; S2: Analyzing the heat resistance detection scheme of the target cable according to the cable material level information to obtain a plurality of positions to be tested of the target cable and detection schemes corresponding to the positions to be tested; S3: applying corresponding detection operations to various locations to be tested of the target cable according to each detection scheme, and collecting detection data of the target cable receiving the detection operation to obtain a heat resistance detection set of the target cable; S4: Perform a comprehensive analysis of the heat resistance performance of the target cable based on the heat resistance test set to obtain the heat resistance performance characteristics of the target cable.

[0013] Specifically, in step S1 of the embodiment provided by the present invention, the construction information of the target cable is obtained, and the material analysis of the construction information is performed to obtain the cable material level information of the target cable, and the cable material level information includes conductor material information, insulation material information, sheath material information and filling material information.

[0014] It can be understood that the cable expected to undergo heat resistance testing consists of a conductor part, an insulation part, a sheath part and a filling part, and each part has corresponding heat resistance performance. Since the position and proportion of each part in the target cable are different, the impact on the overall heat resistance performance of the target cable is also different.

[0015] More specifically, the conductor material information, insulation material information, sheath material information and filling material information include two aspects of information: one is the structural position and structural proportion of the material in the target cable, and the other is the heat resistance of the material itself. The heat resistance includes the ability of heat to conduct in the material, and the degree of influence of different heat on the external display of the physical properties of the material.

[0016] Specifically, in step S2 of the embodiment provided by the present invention, the heat resistance detection scheme of the target cable is analyzed according to the cable material level information to obtain several positions to be tested of the target cable and the detection scheme corresponding to each position to be tested.

[0017] It should be noted that, in the technical solution provided by the present invention, the detection method adopted is to apply different heat conduction measures to multiple test positions of the target cable, so that the various test positions of the target cable are respectively at different temperatures. When the various test positions of the target cable are at different temperatures, different temperatures will have different degrees of impact on the target cable. Specifically, the heat resistance of the target cable determines the impact of different degrees of temperature on the various properties of the target cable. Therefore, the heat resistance of the target cable is judged by testing the target cable at different temperatures.

[0018] More specifically, the test results collected at each test position will provide feedback on the heat resistance performance of the target cable. By comprehensively analyzing the results fed back from multiple test positions, the heat resistance performance characteristics of the target cable can be obtained.

[0019] Specifically, in step S3 of the embodiment provided by the present invention, corresponding detection operations are applied to each position to be tested of the target cable according to each detection scheme, and detection data is collected for the target cable receiving the detection operation to obtain a heat resistance detection set of the target cable.

[0020] More specifically, the detection scheme is to apply temperature to the target cable so that the temperature affects the physical properties of the target cable, including elongation, bendability, compression resistance, etc. Different degrees of temperature will have different impacts on the physical properties of the target cable, and then a deformation operation is performed on the target cable to be tested, that is, the target cable is deformed by a robotic arm or a clamping mechanism. Since the temperature affects the physical properties of the target cable, under the drive of the same deformation operation, the various test positions of the target cable will show different deformation effects, and this deformation effect can feedback the heat resistance of the target cable, that is, the heat resistance of the target cable determines the deformation effect exhibited by the target cable to be tested after receiving the specified temperature heating under the specified deformation operation. Therefore, by applying the specified temperature heating and performing the deformation operation on the target cable, and then collecting the deformation effect, the heat resistance of the target cable can be reversely analyzed.

[0021] More specifically, the heat resistance detection set includes data from heat resistance performance tests received at each test location. Each data item represents the heat resistance performance effect fed back by the test location undergoing a deformation operation at a certain temperature. When the heat resistance performance of the target cable deviates, the deformation error caused by the specified deformation operation at the specified temperature is fixed. The actual heat resistance performance of the target cable can be obtained by comprehensively analyzing the errors reflected by multiple test locations.

[0022] More specifically, since there are multiple locations to be tested on the target cable, and each location to be tested receives a different deformation operation, multiple clamping mechanisms can be used simultaneously to perform deformation tests on each location to be tested on the target cable.

[0023] Specifically, in step S4 of the embodiment provided by the present invention, a comprehensive analysis of the heat resistance performance of the target cable is performed based on the heat resistance detection set to obtain the heat resistance performance characteristics of the target cable.

[0024] The present invention provides a method for detecting heat resistance of cable materials, which has the following beneficial effects: The present invention obtains the structural information of the target cable and performs material analysis to obtain the layer information of the cable, determines the position to be tested and the corresponding detection scheme based on the material layer information, applies the detection operation and collects data to obtain a heat resistance detection set, and comprehensively analyzes the heat resistance performance characteristics of the target cable based on the detection data. This method accurately identifies the heat resistance characteristics of each layer of the cable material through digital simulation and heat diffusion analysis, optimizes the detection position and scheme, and improves the detection accuracy and comprehensiveness. Compared with traditional methods, this method can effectively reduce detection time and cost, improve the safety and reliability of the cable in a high temperature environment, and solves the problem of low efficiency in the prior art of heating the cable as a whole to detect heat resistance.

[0025] Preferably, the step of analyzing the heat resistance detection scheme of the target cable according to the cable material layer information to obtain a plurality of positions to be tested of the target cable and a detection scheme corresponding to each of the positions to be tested includes: S21: performing digital simulation construction on the target cable according to the cable material level information to obtain a digital cable model of the target cable; S22: performing heat diffusion simulation on the target cable based on the digital cable model to obtain heat diffusion characteristics of the target cable; wherein the heat diffusion characteristics are used to describe the diffusion speed and form of heat in the target cable; S23: performing an external manifestation analysis of the heat resistance effect of the target cable based on the digital cable model to obtain a heat resistance manifestation map of the target cable; S24: extracting key nodes from the heat resistance performance map of the target cable to obtain a plurality of temperature detection nodes of the target cable; wherein the temperature detection nodes include a detection temperature value and a corresponding performance detection method; S25: performing an execution requirement analysis of the temperature detection nodes of the digital cable model according to the heat diffusion characteristics, so as to obtain a position to be detected and a detection scheme corresponding to each temperature detection node of the digital cable model.

[0026] Specifically, the physical properties (such as thermal conductivity, specific heat capacity, expansion coefficient, etc.) of various materials (such as conductors, insulation, sheaths, fillings, etc.) obtained from the cable material hierarchy information are input into the calculation model. According to the material information, a digital model of the cable is constructed using computer-aided design (CAD) software or finite element analysis (FEA) tools. This model can accurately represent the structure of the cable, the distribution of each layer of material and their mutual relationship. The digital three-dimensional model of the cable provides an accurate basis for the subsequent heat diffusion simulation, and provides a higher accuracy and visual model representation for the cable heat resistance evaluation.

[0027] More specifically, based on the digital cable model of the cable, heat conduction theory or finite element analysis (FEA) method is used to simulate the heat diffusion. During the simulation process, the heat conduction, radiation and convection characteristics of each material layer of the cable, as well as their physical changes in a high temperature environment are taken into account. Through simulation calculations, the heat diffusion rate inside the cable, temperature distribution, heat transfer mode between different layers and other characteristics are obtained. By simulating the heat diffusion characteristics of the cable under high temperature conditions, the performance of different areas in the heat resistance process can be predicted, and the thermal response characteristics of each layer of the cable material under a high temperature environment can be determined, which helps to formulate more targeted detection plans.

[0028] More specifically, based on the digital cable model and heat diffusion characteristics, an analysis of the external manifestation of heat resistance is carried out. By simulating the temperature response of the cable, the thermal stress, thermal deformation and other effects of the cable at different temperatures are obtained. The heat resistance spectrum of the cable is extracted from the simulation results. The spectrum shows the temperature distribution, thermal changes and other information of the cable at different locations and time points. The heat resistance of the cable under different environmental conditions is intuitively displayed through a visual spectrum, which is convenient for evaluating the working stability of the cable under extreme temperatures. The weakness of the cable can be identified through the spectrum to help determine the area where thermal failure or thermal damage may occur.

[0029] More specifically, key temperature nodes are extracted from the heat resistance spectrum. These nodes are usually locations where the thermal performance of the cable changes greatly, or areas where abnormal temperature rise may occur during the heat diffusion process. At the locations of key nodes, specific temperature detection requirements are defined, including the detection temperature value range and corresponding detection methods (such as thermal imaging, temperature sensors, etc.).

[0030] More specifically, based on the heat diffusion characteristics and the distribution of temperature detection nodes, the digital cable model is subjected to execution demand analysis. The specific operations required for each temperature detection node are analyzed, such as the required sensor type, detection method (thermal imaging, point temperature measurement, distributed temperature sensor, etc.) and sampling frequency. A detailed detection plan is formulated for each location to be tested, including the specific location of the detection, detection time, temperature range and detection tools.

[0031] Preferably, the step of performing digital simulation construction on the target cable according to the cable material level information to obtain a digital cable model of the target cable comprises: S211: digitally simulating the structure of the conductor part, the insulation part, the sheath part and the filling part of the target cable according to the cable material level information to obtain a basic digital cable model; S212: assigning heat resistance performance parameters to the conductor part, the insulation part, the sheath part and the filling part in the digital cable model respectively according to the cable material level information, so as to obtain a complete digital cable model.

[0032] Specifically, the physical properties of each part are extracted from the cable material layer information, such as the structural composition, thickness, material type, etc. of the conductor, insulation layer, sheath and filling material. The cable is usually composed of different functional layers, and each layer has different thermal and electrical properties. The material type, size and shape information are extracted, and the relative position, geometry and material distribution of each layer such as the conductor part, insulation part, sheath part and filling part are analyzed.

[0033] More specifically, the conductor part is constructed in the digital cable model. It is usually made of metal materials (such as copper or aluminum). The conductor's geometry, diameter, arrangement (single strand or twisted), etc. have an important influence on the electrical and thermal performance of the cable. Computer-aided design (CAD) tools or finite element analysis (FEA) tools are used to draw the conductor's geometry and arrangement structure.

[0034] More specifically, the insulating layer part of the cable is constructed. The insulating layer is usually made of polymer materials (such as polyethylene, cross-linked polyethylene, rubber, etc.) and has the function of insulating and protecting the conductor. According to the cable design requirements and material hierarchy information, the thickness, shape of the insulating layer and its relationship with the conductor are constructed, and the geometric properties of the insulating layer material (such as thickness, density, etc.) are determined.

[0035] More specifically, the outer sheath of the simulated cable is usually made of materials with good weather resistance (such as PVC, PE, rubber, etc.). Its function is to protect the internal structure of the cable, especially waterproof and anti-corrosion in the external environment. According to the material hierarchy information and the functional requirements of the outer sheath, the geometry, thickness, and material type of the outer sheath are constructed.

[0036] More specifically, the filling part is mainly used to enhance the mechanical strength of the cable structure. The filling material may be rope, fiber material, etc. According to the design requirements, the distribution position of the filling material and its physical properties (such as density, elastic modulus, etc.) are simulated.

[0037] More specifically, by simulating in detail the geometry and material distribution of the conductor, insulation, sheath and filling parts, a high-precision digital model of the cable can be constructed. The basic form of the digital cable model helps to clarify the physical relationship between the various cable layers. The model lays the foundation for subsequent thermal analysis, electrical performance evaluation and heat resistance testing.

[0038] More specifically, the conductor part is given heat-resistant performance parameters (such as thermal conductivity, specific heat capacity, thermal expansion coefficient, etc.) to ensure its electrical and thermal stability at high temperatures. Based on the thermophysical properties of the conductor material (such as copper, aluminum), the conductor part is given appropriate heat-resistant performance parameters. The impact of temperature increase on the current carrying capacity of the cable also needs to be considered.

[0039] More specifically, the insulation part is assigned heat resistance performance parameters. The thermal stability of the insulation layer is one of the key indicators of the heat resistance of the cable. According to the thermal stability characteristics of the insulating material (such as cross-linked polyethylene, polyvinyl chloride, etc.), the material of this part is assigned appropriate heat resistance parameters (for example, the change in dielectric constant caused by temperature increase, etc.), and the insulation layer is assigned parameters such as thermal conductivity and thermal expansion coefficient, so as to analyze the performance of the cable in a high temperature environment.

[0040] More specifically, the sheath part is assigned heat resistance performance parameters. The heat resistance of the sheath layer determines the long-term performance of the cable in harsh environments. According to the thermophysical properties of the sheath material (such as melting point, thermal conductivity, etc.), the sheath part is assigned appropriate heat resistance parameters.

[0041] More specifically, the filling part is assigned heat-resistant performance parameters. Although the filling material does not directly conduct current, its thermal stability at high temperatures has an indirect impact on the overall performance of the cable. According to the physical properties of the filling material (such as thermal conductivity and heat resistance of the fiber), the filling part is assigned appropriate heat-resistant performance parameters.

[0042] Preferably, the step of performing heat diffusion simulation on the target cable based on the digital cable model to obtain the heat diffusion characteristics of the target cable includes: S221: Determine a temperature starting position based on the digital cable model; wherein the temperature starting position is a fixed point position for simulating laser heating of the target cable by a laser heater; S222: performing a temperature rise simulation in a specified laser heating form on the temperature starting position of the digital cable model, and performing a heat diffusion simulation on the surface adjacent position and the inner adjacent position of the temperature rise simulation of the temperature starting position according to the digital cable model, so as to obtain the unit simulation characteristics of the target cable; S223: resetting the state of the digital cable model and adjusting the specified laser heating form to obtain a new laser heating form, and using the new laser heating form as the specified laser heating form to return to the previous step to perform heat diffusion simulation until unit simulation characteristics corresponding to various laser specified heating forms of the target cable are obtained; S224: combining unit simulation characteristics corresponding to various specified laser heating forms of the target cable to obtain heat diffusion characteristics of the target cable.

[0043] Specifically, determine the location of the heat source in the simulation, that is, the point of action of the laser heater. This position is the starting point of the simulated heat diffusion and directly affects the way the heat diffuses inside the cable. According to the digital cable model, determine the specific position of the simulated laser heater. This position is usually selected as the surface of the cable, that is, in a specific area of ​​the cable (such as the conductor part or near the insulation layer). Simulate the heat energy concentration point of the laser heater and determine the fixed position of heating. The outer surface of the cable or the inner layer of the cable (such as the conductor) can be selected. Based on the simulation purpose and experimental settings, by clarifying the starting position of the heat source, the accuracy and realism of the heat diffusion simulation can be ensured, so that the temperature changes in different areas of the cable during the actual heating process can be more accurately predicted.

[0044] More specifically, a temperature rise simulation is performed at the temperature starting position, the temperature rise process under the action of the laser heater is simulated, and the diffusion of heat from the starting position to other parts of the cable is simulated. The heat input of laser heating is simulated, and the temperature rise is performed at the temperature starting position in the digital cable model. Based on physical properties such as the heat conduction equation and the thermal diffusion coefficient, the heat of laser heating is applied at the target position to increase the temperature, and the process of temperature change over time is inferred.

[0045] More specifically, the heat diffusion near the surface of the temperature starting position is simulated. The heat diffuses through the conductor part, insulation layer, sheath, etc., calculates the temperature change near the surface, simulates the diffusion of heat from the surface or starting position to the inside of the cable (such as the inner layer of the conductor and insulation layer), and focuses on analyzing the conduction of heat between the conductor, insulation layer, sheath and filling material.

[0046] More specifically, during the simulation process, different heat transfer mechanisms (such as conduction, convection, radiation, etc.) are used to accurately calculate the temperature changes at different locations inside and outside the cable, thereby obtaining the local thermal response of the cable. It is possible to intuitively observe how the heat diffuses from the temperature starting point to different parts of the cable, and provide data support for subsequent optimization. The simulation results can be used to compare heat diffusion at different levels (surface and internal), providing an in-depth analysis of how the cable structure affects thermal management.

[0047] More specifically, after each simulation, the state of the cable model is reset, and the laser heating form (such as heating area, power, frequency, etc.) is adjusted to perform a new heat diffusion simulation and restore the cable model to its initial state (i.e., the temperature returns to normal temperature) in preparation for the next round of simulation.

[0048] More specifically, the laser heating mode is adjusted, such as changing the position, heating power, heating duration, etc. of the laser heating, to obtain the heat diffusion characteristics under different heating forms. For example, the size and shape of the laser heating can be changed, or the heating point can be moved to other positions of the cable to simulate the temperature changes under different laser heating modes. By adjusting the laser heating form, a variety of possible heating methods can be simulated to understand the thermal response characteristics under different heating modes, and the impact of various laser heating forms on the cable can be evaluated, thereby optimizing the design and reducing the damage to the cable structure caused by high temperature.

[0049] More specifically, the unit simulation features under different laser heating forms are combined to obtain a complete target cable heat diffusion feature, and the heat diffusion simulation results under each laser heating form are merged. This may involve combining the results under different heating conditions into a unified heat diffusion feature by statistical methods or weighted averages, and forming the final heat diffusion feature based on the heat diffusion simulation results obtained by different heating forms and comprehensively considering the overall heat distribution of the cable.

[0050] More specifically, by synthesizing the simulation results under different laser heating modes, the performance of the cable under different heat loads can be more comprehensively evaluated, thereby providing a multi-dimensional reference for design and optimization. Based on the combined results of the heat diffusion characteristics, the cable design can be optimized to maintain good thermal performance under various working conditions and avoid potential failures caused by overheating.

[0051] Preferably, the step of performing an external manifestation analysis of the heat resistance effect of the target cable based on the digital cable model to obtain a heat resistance manifestation map of the target cable comprises: S231: determining a manifestation display position based on the digital cable model, and applying a temperature parameter and a deformation parameter to the manifestation display position, so as to simulate a deformation effect of the determined manifestation display position of the digital cable model according to the temperature parameter and the deformation parameter, and obtain a theoretical deformation effect of the manifestation display position; S232: Taking the theoretical deformation effect as a reference effect, performing an extended analysis on the reference effect to obtain an extended effect distribution of the reference effect, and performing a reverse analysis on the heat resistance performance of the digital cable model according to the extended effect distribution to obtain a heat resistance performance distribution of the digital cable model corresponding to the extended effect distribution; S233: combining the expansion effect distribution and the heat resistance performance distribution to obtain a test simulation feature of the digital cable model; S234: adjusting the temperature parameter and the deformation parameter, and re-simulating the deformation effect, performing expansion analysis and reverse analysis on the embodiment display position according to the adjusted temperature parameter and deformation parameter, so as to obtain the test simulation characteristics of the digital cable model corresponding to various temperature parameters and deformation parameters; S235: Constructing a temperature data axis and a deformation data axis according to the temperature parameters and deformation parameters corresponding to each of the test simulation features, constructing a test simulation framework through the temperature data axis and the deformation data axis, and substituting each of the test simulation features into a corresponding position in the test simulation framework according to the temperature parameters and deformation parameters corresponding to each of the test simulation features, so as to obtain the heat resistance embodiment map.

[0052] Specifically, determine the key positions in the cable that need to exhibit thermal and deformation effects. These positions will be used to apply and analyze temperature parameters and deformation parameters. According to the cable structure, usage environment and specific application requirements, select the key positions in the cable as the target points for simulation. For example, select the outer surface of the cable, the conductor or the area near the insulation layer that is easily affected by heat. After selection, clarify the temperature changes and deformation parameters that need to be applied, usually the temperature rise and the deformation caused by thermal expansion, which provides a specific calculation area for subsequent simulation and analysis, ensuring that the deformation and thermal response of each cable component under heat load can be accurately displayed.

[0053] More specifically, at a selected embodiment display position, temperature and deformation parameters are applied to simulate the deformation effect of the position during heating and obtain a theoretical deformation effect.

[0054] More specifically, according to the actual working environment of the target cable, a specific temperature change (such as laser heating, ambient temperature and other factors) is applied to simulate the temperature rise of the target position, and deformation parameters are applied to the target position. The deformation force applied by the external clamping structure of the deformation parameters on the target position corresponds to cables with different physical properties at different temperatures. The deformation effects after receiving the same deformation parameters are different. Combined with the application of temperature and deformation, a thermal-structural coupling analysis is carried out to simulate the deformation effect of the display position under these two conditions.

[0055] More specifically, based on the theoretical deformation effect, an extended analysis is performed to obtain the possible distribution of effects that the cable may exhibit under the temperature and deformation parameters. That is, when the heat resistance of the cable is inconsistent with the theory, the effect obtained in the extended analysis will appear.

[0056] It can be understood that the extended analysis is to simulate the deformation effect of cables with different heat resistance and theoretical heat resistance after receiving temperature, and then, based on the various effects obtained by the extended analysis, the heat resistance of the cables with various effect feedback is deduced. That is, through reverse analysis, the extended effect and the material properties, structure, thermal management mechanism and other factors of the cable are reversely solved to obtain the heat resistance distribution of the cable.

[0057] More specifically, a multi-dimensional test simulation feature set is constructed by combining the expansion effect and heat resistance performance distribution, and the temperature and deformation parameters are adjusted to perform new thermal effect and deformation effect simulations to obtain a wider range of test simulation features. Based on the new parameters, deformation simulation, expansion analysis and reverse analysis are re-performed to obtain new test simulation features.

[0058] More specifically, based on the temperature parameters and deformation parameters, a two-dimensional data axis is constructed to represent the range of temperature and deformation changes respectively. Each test simulation feature is substituted into the corresponding position in the test framework to construct a complete heat resistance spectrum. Through the above process, a spectrum is finally obtained, showing the heat resistance effect and deformation characteristics of the cable under different temperature and deformation conditions.

[0059] Preferably, the step of extracting key nodes from the heat resistance performance map of the target cable to obtain a plurality of temperature detection nodes of the target cable comprises: S241: performing a difference relationship analysis between the expansion effect distribution and the heat resistance performance distribution of each of the test simulation features in the heat resistance performance map to obtain a test feedback effectiveness index of each of the test simulation features; S242: performing execution difficulty analysis of temperature parameters and deformation parameters on each of the test simulation features in the heat resistance performance map to obtain a test execution feasibility index of each of the test simulation features; S243: performing a weighted evaluation of the priority of each of the test simulation features according to the test effectiveness index and the test execution feasibility index of each of the test simulation features to obtain a priority index of each of the test simulation features; S244: Prioritize and select each of the test simulation features according to their priority indexes to obtain a test combination consisting of several test simulation features with the highest priority index, and analyze the parallel feasibility of the test combination. If the parallel feasibility of the test combination does not meet the preset standard, the test simulation features in the test combination are replaced. If the parallel feasibility of the test combination meets the preset standard, each of the test simulation features in the test combination is used as several temperature detection nodes of the target cable.

[0060] Specifically, the differences among the various test simulation features in the heat resistance performance map are analyzed, and the test feedback effectiveness index of each feature is calculated to evaluate the response effectiveness and accuracy of each test simulation feature.

[0061] More specifically, the difference between the extended effect distribution and the heat resistance performance distribution of each test simulation feature is compared. For example, the thermal response and deformation degree of different parts of the cable under different temperature and deformation conditions are analyzed to evaluate whether they can accurately reflect the actual heat resistance performance of the cable. According to the results of the difference analysis, the feedback effectiveness index of each test simulation feature is calculated. The higher the feedback effectiveness index, the more accurate the feedback of the feature on the heat resistance performance of the cable, which helps to further optimize the heat resistance performance prediction.

[0062] More specifically, the difficulty of applying the temperature and deformation parameters required for each test simulation feature is analyzed, and the test execution feasibility index of each feature is calculated to evaluate the difficulty of its implementation in actual testing. The difficulty in actual execution is evaluated based on the temperature change range, deformation degree and simulation conditions required for each test simulation feature. If high-precision control or complex physical experimental conditions are required, the difficulty is higher; if the test can be completed under conventional experimental conditions, the difficulty is lower. According to the difficulty of execution, a test execution feasibility index is assigned to each feature. The higher the feasibility index, the greater the possibility that the test feature can be realized in the actual environment.

[0063] More specifically, the feasibility index can screen out test features that are easy to implement and avoid selecting tests that are too complex or difficult to implement, thereby saving time and resources, ensuring that each test feature can be executed smoothly, and reducing test failures or data deviations caused by excessive experimental difficulty.

[0064] More specifically, a weighted evaluation is performed on each test simulation feature according to the test feedback effectiveness index and the test execution feasibility index to obtain a priority index, so as to determine which test features should be executed first, and the test feedback effectiveness index and the test execution feasibility index are weighted to comprehensively obtain the priority index of each test simulation feature. The weighting method can be adjusted according to actual needs. For example, when the feedback effectiveness weight is higher, the feature with the most accurate test feedback is given priority. The reliability of feedback and the feasibility of execution are comprehensively considered to calculate the priority index of each test simulation feature.

[0065] More specifically, the various test simulation features are sorted according to the priority index, and the feature combination with a higher priority is selected to obtain the final test combination. All test simulation features are sorted according to the priority index, and the features with a higher priority will be selected first. The test simulation features with a higher priority are selected and form a test combination. The combination includes the features with the highest priority index, and the final test combination is determined to ensure that the features in the combination have high feedback effectiveness and execution feasibility.

[0066] More specifically, by prioritization and selection, resources can be concentrated on the most critical tests, ensuring that the test results reflect the key heat resistance performance of the cable under different conditions. Selecting features with high priority indexes for testing helps to improve the accuracy and representativeness of the test results.

[0067] More specifically, a parallel feasibility analysis is performed on the final test combination to ensure that all test features can be carried out smoothly under the same experimental conditions and meet the preset standards. It is analyzed whether the various test features in the test combination can be carried out in the same time period without interfering with each other, and whether the experimental conditions required for each feature can be met at the same time. It is ensured that the parallel testing of the combination can meet the preset standards and experimental conditions. For example, whether the temperature, time, deformation and other requirements can be taken into account at the same time. If the parallel feasibility of the test combination does not meet the preset standards, some of the test features need to be replaced and the combination needs to be re-optimized.

[0068] More specifically, a final number of temperature detection nodes are determined, and these nodes are used to test the heat resistance of the cable. Based on the final test combination, each test feature is used as an independent temperature detection node to cover the key positions of the cable. Temperature sensors are installed at the corresponding positions of the cable to perform actual temperature measurement and monitoring. In actual tests, the heat resistance performance is evaluated based on the data from these temperature detection nodes to ensure that the thermal response of the cable under different working conditions can be effectively monitored.

[0069] Preferably, the step of performing an execution requirement analysis of the temperature detection nodes of the digital cable model according to the heat diffusion characteristics to obtain a position to be detected and a detection scheme corresponding to each temperature detection node of the digital cable model comprises: S251: performing a test assignment of a position to be tested to each of the temperature detection nodes based on the digital cable model to obtain a characteristic distribution of the position to be tested of the digital cable model; S252: simulating the test effect of the temperature detection node of the digital cable model according to the characteristic distribution of the position to be tested, so as to obtain the overall test state of the digital cable model receiving the characteristic distribution corresponding to the position to be tested; S253: simulating the effect of test execution on the overall test state of the digital cable model, and optimizing the distribution of the position characteristics to be tested according to the result of the effect simulation, until an optimal position characteristic distribution is obtained; S254: analyzing the optimal position characteristic distribution to obtain the position to be measured of each temperature detection node; S255: analyzing the execution requirements of the temperature parameters of the temperature detection nodes according to the heat diffusion characteristics, so as to obtain a laser heating solution that enables the position to be measured to have the temperature parameters corresponding to the temperature detection nodes; S256: Analyzing the execution requirements of the deformation parameters of the temperature detection node to obtain a deformation driving scheme that enables the position to be measured to have the deformation parameters corresponding to the temperature detection node; S257: Combining the laser heating scheme with the deformation driving scheme to obtain a detection scheme for the temperature detection node.

[0070] Specifically, the test positions of each temperature detection node in the digital cable model are determined to provide a basis for subsequent tests. Based on the physical model, heat diffusion characteristics and design parameters of the digital cable, different temperature detection nodes are allocated to the model and given test positions. These test positions usually cover the key parts of the cable (such as joints, outer insulation, etc.) to ensure the comprehensiveness of the test results. The distribution of each test position is obtained through the calculation and analysis of the heat diffusion characteristics.

[0071] More specifically, the test effect of the temperature detection node of the digital cable model is simulated according to the characteristic distribution of the position to be tested, and the overall test state is obtained. The overall test effect of the temperature detection node is evaluated by simulating the thermal response of the position to be tested. Based on the thermal diffusion characteristics of the cable model, the temperature changes of each position to be tested under different temperature and environmental conditions are simulated. Through thermal simulation, the response effect of each position is obtained, and their effectiveness on different detection nodes is evaluated. The response results of all positions to be tested are combined to obtain the overall test state, and the temperature change trend of the entire cable model under different conditions is analyzed.

[0072] More specifically, the distribution of the characteristics of the positions to be tested is optimized through effect simulation to ensure that the final test solution has the best coverage and accuracy. The test effects under different distributions of the characteristics of the positions to be tested are evaluated by simulating the overall test state. According to the results of the effect simulation, the distribution of the positions to be tested is optimized. For example, the density or position of the test points is adjusted so that the test can more comprehensively reflect the temperature changes of the cable under actual working conditions. By optimizing the positions to be tested, redundant tests are avoided to ensure the best balance between the test range and efficiency.

[0073] More specifically, the optimized distribution of the characteristics of the positions to be tested is analyzed, and the specific positions of each temperature detection node to be tested are finally determined. According to the optimal position characteristic distribution, the specific position of each temperature detection node in the cable model is analyzed to ensure that these positions can accurately reflect the temperature state of the cable. The optimized characteristics of the positions to be tested can ensure that each test point can accurately reflect the temperature change of the cable, avoiding test omissions or unnecessary redundancy. The temperature parameter execution requirements of the temperature detection node are analyzed according to the heat diffusion characteristics, and the laser heating solution is obtained. More specifically, according to the heat diffusion characteristics, the temperature execution requirements of the temperature detection node are analyzed, and a corresponding laser heating scheme is designed to accurately control the temperature of the measured position. The temperature response of the measured position is analyzed, the required temperature range and its rate of change are determined, and a laser heating scheme is designed based on the temperature requirements to ensure that the laser can provide accurate and controllable heat input to simulate the temperature changes of the cable in a real environment.

[0074] More specifically, the deformation response of the position to be tested is analyzed, and a corresponding deformation drive scheme is designed to simulate the deformation of the cable in a thermal environment. Based on the temperature response analysis, the deformation requirements (such as expansion, contraction, etc.) of each position to be tested are determined, and a deformation drive scheme is designed to simulate the deformation of the cable through external forces or control devices to ensure that the simulated environmental conditions during the test are real and reliable. The deformation drive scheme can simulate the thermal response deformation of the cable to ensure the comprehensiveness and authenticity of the test data.

[0075] More specifically, a comprehensive detection scheme is designed by combining the laser heating scheme and the deformation drive scheme to achieve precise control of temperature and deformation. The laser heating scheme is combined with the deformation drive scheme to develop a comprehensive temperature detection scheme to ensure simultaneous control and detection of temperature and deformation during the test. According to the final detection scheme, the actual testing process is implemented, and data collection and analysis are carried out.

[0076] Preferably, the steps of applying corresponding detection operations to various locations to be tested of the target cable according to each detection scheme, and collecting detection data of the target cable receiving the detection operation to obtain a heat resistance detection set of the target cable include: S31: applying a laser heating operation to the position to be measured of the target cable according to the laser heating scheme, so that the actual temperature of the position to be measured of the target cable corresponds to the temperature parameter of the laser heating scheme; S32: applying a deformation operation to the position to be tested of the target cable according to the deformation driving scheme, so that the position to be tested of the target cable receives deformation parameters corresponding to the deformation driving scheme; S33: collecting data of actual deformation of the target cable's test position through a preset sensor group to obtain heat resistance detection characteristics of the target cable's test position. The heat resistance detection characteristics of each test position together constitute a heat resistance detection set of the target cable.

[0077] Specifically, the position to be tested of the cable is heated to a set temperature through a laser heating operation to simulate the working state of the cable in a high temperature environment. According to the aforementioned laser heating scheme, the appropriate laser type, power and heating time are selected to heat the position to be tested of the target cable. The core of this operation is to ensure that the temperature change of the position to be tested matches the temperature parameters in the laser heating scheme; according to the heat capacity and thermal conductivity of the position to be tested, the power of the laser is adjusted, and the time and temperature change curve during the heating process are controlled to ensure that it is gradually heated to the target temperature. The temperature change of the position to be tested is monitored in real time through a temperature sensor to ensure that the predetermined temperature is reached and to prevent overheating or uneven heating. By accurately controlling the temperature parameters of laser heating, the cable position to be tested is ensured to reach the target temperature, simulating the high temperature environment under actual use conditions, and ensuring that the temperature of the position to be tested is uniform through appropriate heating power and time control to avoid affecting the test results due to local overheating.

[0078] More specifically, the physical deformation of the cable under high temperature conditions is simulated through deformation drive operation to study the deformation performance and heat resistance of the cable. According to the deformation drive scheme, the position to be tested is deformed by external force (such as stretching, compression, bending, etc.). According to the structural characteristics of the cable, appropriate stretching or compression force is applied to the position to be tested. When the temperature rises, the bending or twisting deformation of the cable at the specified force parameters is simulated. According to the setting of the deformation drive scheme, the applied deformation amount and rate are controlled to ensure that the applied deformation force meets the expected parameters. More specifically, by applying appropriate external force, the deformation behavior of the cable at high temperature is accurately simulated, and the cable's deformation resistance under actual use conditions is tested. By strictly controlling the applied external force and deformation amount, the deformation operation is controllable and meets the detection requirements.

[0079] More specifically, the actual deformation data of the position to be tested is obtained through the sensor group, and combined with the temperature data during the heating process, heat resistance testing is performed. Multiple sensors (such as temperature sensors, strain gauges, displacement sensors, etc.) are deployed at the position to be tested of the target cable for data collection. The temperature sensor monitors the temperature change of the position to be tested in real time, the strain gauge monitors the deformation of the position to be tested, especially the strain in the stress area, and the displacement sensor measures the deformation of the cable and records the position change. More specifically, the sensor collects data in real time during the laser heating and deformation operation of the cable, including temperature, strain, displacement and other information. The acquisition frequency should be high enough to capture the tiny deformation that may occur in the cable during the temperature change. The collected data will be recorded, pre-processed and analyzed. The analysis results will be used to further evaluate the heat resistance of the cable under high temperature and deformation conditions.

[0080] More specifically, by deploying a sensor group, multi-dimensional data such as temperature and deformation of the test location can be obtained to ensure the comprehensiveness and accuracy of the test data. The sensors provide real-time data so that the temperature and deformation changes of the cable during the test can be fed back in time and adjustments can be made.

[0081] More specifically, based on the collected data, the heat resistance characteristics of the cable under different conditions are analyzed to form a set of heat resistance detection features of the cable. Key features related to heat resistance are extracted from the collected data, such as: Temperature tolerance: evaluate the stability of the cable at high temperatures, whether the performance can be maintained unchanged or decreased, deformation tolerance: evaluate whether the cable has permanent deformation or damage under the dual effects of high temperature and deformation, thermal strain relationship: analyze the strain performance of the cable under different temperature conditions, and evaluate the reversibility of its deformation and thermal stability.

[0082] More specifically, the temperature and deformation data are combined to comprehensively evaluate the heat resistance of the cable. Machine learning or data analysis methods can be used to further optimize the feature analysis, identify the weaknesses or abnormal performance of the cable, and extract and analyze key features to obtain the comprehensive performance of the cable in the heat resistance test, thereby evaluating its heat resistance. The collection of heat resistance detection features provides a comprehensive assessment of the target cable's high temperature resistance and deformation, helping to determine the reliability and applicability of the cable in practical applications.

[0083] More specifically, by integrating the heat resistance detection characteristics of each position to be tested, a complete heat resistance detection set of the target cable is formed. According to the heat resistance detection characteristics of each position to be tested, a complete cable heat resistance performance set is constructed, covering various aspects such as temperature change and deformation response. Combined with the heat resistance performance of each position of the cable, the overall heat resistance of the cable under different working environments is obtained, and its stability and reliability in long-term use are evaluated. By integrating the test results of each position, a comprehensive heat resistance detection feature of the target cable is formed, which can provide reliable data support for cable design and application.

[0084] Preferably, the step of performing a comprehensive analysis of the heat resistance performance of the target cable based on the heat resistance detection set to obtain the heat resistance performance characteristics of the target cable includes: S41: performing effect and performance mapping analysis on each heat resistance detection feature in the heat resistance detection set according to the expansion effect distribution and the heat resistance performance distribution in the test simulation feature, so as to obtain the detection heat resistance performance fed back by each heat resistance detection feature; S42: Perform a weighted comprehensive analysis on the heat resistance performance feedback from each position to be tested to obtain the heat resistance performance characteristics of the target cable.

[0085] Specifically, through mapping analysis, the heat resistance detection characteristics are matched with the expansion effect distribution and heat resistance performance distribution in the test simulation characteristics to obtain the heat resistance performance fed back by each detection position.

[0086] More specifically, based on the structure and material properties of the cable, the distribution of extended effects (i.e., the thermal effects, deformation effects, etc. that may occur in cables with different heat resistance in different environments) is obtained. These distributions will be reflected in the changes in heat resistance, such as thermal expansion, thermal strain, and degradation of mechanical properties that may be caused by increased temperature.

[0087] More specifically, through the aforementioned heating operation, deformation driving operation and sensor data acquisition, response data related to temperature, deformation, etc. are obtained. These extended effect distributions reflect the response mode of the cable under different test conditions, including thermal stress, thermal deformation, etc.

[0088] More specifically, the heat resistance detection characteristics of each test position collected from the sensor are mapped correspondingly to the distribution of the expansion effect. The mapping analysis can be performed in the following ways: Correlation analysis between temperature and deformation: For each test position, the relationship between temperature change and deformation is analyzed, and the data from strain gauges, displacement sensors, etc. are combined to map to the thermal performance of the cable, the heat resistance of the strain response: Through the data from the strain gauge, the strain response of the cable at different temperatures is analyzed, and combined with the material properties of the cable, it is mapped to the heat resistance at different temperatures, the relationship between thermal expansion coefficient and heat resistance: By testing the thermal expansion conditions at different positions and combining the expansion coefficient of the material, the stability of the cable in a high temperature environment is mapped.

[0089] More specifically, through the above mapping analysis, feedback on the heat resistance performance of each position to be tested is obtained. For example, a certain position exhibits a large deformation and significant thermal expansion at a higher temperature, indicating that the heat resistance performance of this position is poor; while another position may exhibit stable deformation characteristics at a higher temperature, indicating that the heat resistance performance of this position is good.

[0090] More specifically, by mapping the expansion effect distribution with the heat resistance performance distribution, the heat resistance performance of the cable under different working conditions can be accurately reflected. This mapping analysis not only reflects the state of the cable at a certain moment, but also can dynamically evaluate the heat resistance stability of the cable under different working conditions.

[0091] More specifically, according to the heat resistance performance of different test positions, combined with their importance and weight, a weighted comprehensive analysis is performed on the heat resistance performance feedback from each location to obtain the overall heat resistance performance characteristics of the target cable. According to the structure, use environment and testing requirements of the cable, different weights are assigned to each test position. Finally, based on the results of the weighted comprehensive analysis, the heat resistance performance characteristics of the target cable are obtained, and the heat resistance evaluation of the cable in actual applications is provided.

[0092] In a second aspect, the present invention provides a device for detecting heat resistance of cable materials, which is used to implement a method for detecting heat resistance of cable materials as described in any one of the first aspects.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting heat resistance of cable materials, characterized in that: include: Acquire the construction information of the target cable, and perform material analysis on the construction information to obtain the cable material level information of the target cable; wherein the cable material level information includes conductor material information, insulation material information, sheath material information and filling material information; Analyzing the heat resistance detection scheme of the target cable according to the cable material level information to obtain a plurality of positions to be tested of the target cable and a detection scheme corresponding to each of the positions to be tested; According to each of the detection schemes, corresponding detection operations are respectively applied to each to-be-tested position of the target cable, and detection data are collected from the target cable receiving the detection operation, so as to obtain a heat resistance detection set of the target cable; A comprehensive analysis of the heat resistance performance of the target cable is performed based on the heat resistance detection set to obtain the heat resistance performance characteristics of the target cable.

2. The method for detecting heat resistance of cable materials according to claim 1, characterized in that: The steps of analyzing the heat resistance detection scheme of the target cable according to the cable material level information to obtain a plurality of positions to be tested of the target cable and a detection scheme corresponding to each of the positions to be tested include: Performing digital simulation construction on the target cable according to the cable material level information to obtain a digital cable model of the target cable; Performing heat diffusion simulation on the target cable based on the digital cable model to obtain heat diffusion characteristics of the target cable; wherein the heat diffusion characteristics are used to describe the diffusion speed and form of heat in the target cable; Performing an external performance analysis of the heat resistance effect of the target cable based on the digital cable model to obtain a heat resistance performance map of the target cable; Extract key nodes from the heat resistance performance map of the target cable to obtain several temperature detection nodes of the target cable; wherein the temperature detection nodes include detection temperature values ​​and corresponding performance detection methods; The execution requirements of the temperature detection nodes of the digital cable model are analyzed according to the heat diffusion characteristics to obtain the positions to be detected and the detection schemes corresponding to the temperature detection nodes of the digital cable model.

3. The method for detecting heat resistance of cable materials according to claim 2, characterized in that: The step of performing digital simulation construction on the target cable according to the cable material level information to obtain a digital cable model of the target cable comprises: According to the cable material level information, digital simulation is performed on the composition structure of the conductor part, the insulation part, the sheath part and the filling part of the target cable to obtain a basic digital cable model; According to the cable material level information, heat resistance performance parameters are assigned to the conductor part, the insulation part, the sheath part and the filling part in the digital cable model respectively to obtain a complete digital cable model.

4. The method for detecting heat resistance of cable materials according to claim 2, characterized in that: The step of simulating the heat diffusion of the target cable based on the digital cable model to obtain the heat diffusion characteristics of the target cable includes: Determining a temperature starting position based on the digital cable model; wherein the temperature starting position is a fixed point position where a simulated laser heater performs laser heating on the target cable; Performing a temperature rise simulation of a specified laser heating form on the temperature starting position of the digital cable model, and performing a heat diffusion simulation of a surface adjacent position and an internal adjacent position on the temperature rise simulation of the temperature starting position according to the digital cable model to obtain a unit simulation feature of the target cable; Resetting the state of the digital cable model and adjusting the specified laser heating form to obtain a new laser heating form, and using the new laser heating form as the specified laser heating form to return to the previous step to perform heat diffusion simulation until unit simulation characteristics corresponding to various laser specified heating forms of the target cable are obtained; The unit simulation characteristics corresponding to various specified laser heating forms of the target cable are combined to obtain the heat diffusion characteristics of the target cable.

5. The method for detecting heat resistance of cable materials according to claim 2, characterized in that: The step of performing an external performance analysis of the heat resistance effect of the target cable based on the digital cable model to obtain a heat resistance performance map of the target cable includes: Determine the embodiment display position based on the digital cable model, and apply the temperature parameter and the deformation parameter to the embodiment display position, so as to simulate the deformation effect of the determined embodiment display position of the digital cable model according to the temperature parameter and the deformation parameter, and obtain the theoretical deformation effect of the embodiment display position; Performing an extended analysis with the theoretical deformation effect as a reference effect to obtain an extended effect distribution of the reference effect, and performing a reverse analysis of the heat resistance performance of the digital cable model according to the extended effect distribution to obtain a heat resistance performance distribution of the digital cable model corresponding to the extended effect distribution; Combining the expansion effect distribution with the heat resistance performance distribution to obtain a test simulation feature of the digital cable model; The temperature parameter and the deformation parameter are adjusted, and the deformation effect simulation, expansion analysis and reverse analysis are re-performed on the embodiment display position according to the adjusted temperature parameter and deformation parameter to obtain the test simulation characteristics of the digital cable model corresponding to various temperature parameters and deformation parameters; A temperature data axis and a deformation data axis are constructed according to the temperature parameters and deformation parameters corresponding to each of the test simulation features, a test simulation framework is constructed through the temperature data axis and the deformation data axis, and each of the test simulation features is substituted into the corresponding position in the test simulation framework according to the temperature parameters and deformation parameters corresponding to each of the test simulation features to obtain the heat resistance spectrum.

6. The method for detecting heat resistance of cable materials according to claim 5, characterized in that: The step of extracting key nodes from the heat resistance performance map of the target cable to obtain a plurality of temperature detection nodes of the target cable includes: Performing a difference relationship analysis between the expansion effect distribution and the heat resistance performance distribution of each of the test simulation features in the heat resistance performance map to obtain a test feedback effectiveness index of each of the test simulation features; Performing an execution difficulty analysis of temperature parameters and deformation parameters on each of the test simulation features in the heat resistance performance map to obtain a test execution feasibility index for each of the test simulation features; Performing a weighted evaluation of the priority of each of the test simulation features according to the test effectiveness index and the test execution feasibility index of each of the test simulation features to obtain a priority index of each of the test simulation features; The test simulation features are prioritized and selected and combined according to their priority indexes to obtain a test combination consisting of several test simulation features with the highest priority indexes, and the test combination is analyzed for parallel feasibility. If the parallel feasibility of the test combination does not meet the preset standards, the test simulation features in the test combination are replaced. If the parallel feasibility of the test combination meets the preset standards, each test simulation feature in the test combination is used as a number of temperature detection nodes of the target cable.

7. The method for detecting heat resistance of cable materials according to claim 5, characterized in that: The steps of performing an execution requirement analysis of the temperature detection nodes of the digital cable model according to the heat diffusion characteristics to obtain a position to be detected and a detection scheme corresponding to each temperature detection node of the digital cable model include: Based on the digital cable model, each of the temperature detection nodes is tested and assigned a position to be tested, so as to obtain a characteristic distribution of the position to be tested of the digital cable model; According to the characteristic distribution of the position to be tested, the test effect simulation of the temperature detection node of the digital cable model is performed to obtain the overall test state of the digital cable model receiving the characteristic distribution corresponding to the position to be tested; Performing a test execution effect simulation on the overall test state of the digital cable model, and optimizing the distribution of the position characteristics to be tested according to the result of the effect simulation, until an optimal position characteristic distribution is obtained; Analyzing the optimal position characteristic distribution to obtain the position to be measured of each of the temperature detection nodes; Analyzing the execution requirements of the temperature parameters of the temperature detection node according to the heat diffusion characteristics to obtain a laser heating solution that enables the position to be measured to have the temperature parameters corresponding to the temperature detection node; Analyzing the deformation parameters of the temperature detection node according to the execution requirements to obtain a deformation driving scheme that enables the position to be measured to have the deformation parameters corresponding to the temperature detection node; The laser heating scheme is combined with the deformation driving scheme to obtain a detection scheme for the temperature detection node.

8. The method for detecting heat resistance of cable materials according to claim 7, characterized in that: The steps of respectively applying corresponding detection operations to various locations to be tested of the target cable according to each detection scheme, and collecting detection data of the target cable receiving the detection operation to obtain a heat resistance detection set of the target cable include: Applying a laser heating operation to the position to be measured of the target cable according to the laser heating scheme so that the actual temperature of the position to be measured of the target cable corresponds to the temperature parameter of the laser heating scheme; Applying a deformation operation to the position to be measured of the target cable according to the deformation driving scheme, so that the position to be measured of the target cable receives deformation parameters corresponding to the deformation driving scheme; The actual deformation data of the target cable's test position is collected through a preset sensor group to obtain the heat resistance detection characteristics of the target cable's test position. The heat resistance detection characteristics of each test position together constitute the heat resistance detection set of the target cable.

9. The method for detecting heat resistance of cable materials according to claim 8, characterized in that: The step of performing a comprehensive analysis on the heat resistance performance of the target cable based on the heat resistance detection set to obtain the heat resistance performance characteristics of the target cable includes: According to the expansion effect distribution and the heat resistance performance distribution in the test simulation feature, a mapping analysis of the effect and the performance is performed on each heat resistance detection feature in the heat resistance detection set to obtain the heat resistance performance of the detection fed back by each heat resistance detection feature; A weighted comprehensive analysis is performed on the heat resistance performance feedback from each location to be tested to obtain the heat resistance performance characteristics of the target cable.

10. A device for detecting heat resistance of cable materials, characterized in that: Used to implement a method for detecting heat resistance of cable materials as described in any one of claims 1-9.

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