Safety evaluation method of alloy spray-coated wire and cable tray based on cable morphology analysis

Abstract

The present invention relates to the field of cable tray safety, and discloses a safety evaluation method for an alloy-sprayed plastic wire and cable tray based on cable morphology analysis, comprising the following steps: performing cable arrangement distribution analysis and operation status analysis on the alloy-sprayed plastic wire and cable tray, and constructing a cable real-time status update map based on the analysis results. According to the cable real-time status update map, a cable adaptation analysis is performed on the alloy-sprayed plastic wire and cable tray, the cause of abnormal adaptation of the cable tray is determined, and the safety stability of the alloy-sprayed plastic wire and cable tray is evaluated according to the cause of abnormal adaptation. The present invention can determine the potential risks of the alloy-sprayed plastic wire and cable tray by the morphology of the cable, and implement safety evaluation based on the potential risks.

Description

Technical Field

[0001] The invention relates to the field of cable bridge safety, in particular to a safety evaluation method for an alloy plastic-sprayed wire and cable bridge based on cable morphology analysis. Background Art

[0002] Alloy spray-coated wire and cable trays are made of metal materials, such as alloys, and the surface is treated with high-quality spray-coated technology to form a uniform and dense coating. This type of bridge not only has the strength and durability of the alloy, but also has the anti-corrosion and beautiful characteristics brought by the spray-coated technology. If the alloy spray-coated wire and cable tray is not evaluated for safety, it is easy to collapse and deform, affecting the safe support of the wires and cables, that is, affecting the stable operation of the wires and cables, and at the same time affecting the insulation treatment during cable laying, causing electrical short circuits and leakage accidents. Safety evaluation of alloy spray-coated wire and cable trays can timely discover and eliminate potential fire hazards and reduce fire risks. Through safety evaluation, potential safety problems can be discovered in the project design stage and corresponding improvement measures can be taken. This helps to reduce the adjustment and rework construction costs caused by failure to meet safety requirements after the project is completed. Therefore, a safety evaluation method for alloy spray-coated wire and cable trays based on cable morphology analysis is proposed for safety evaluation of alloy spray-coated wire and cable trays. Summary of the invention

[0003] The invention overcomes the shortcomings of the prior art and provides a safety evaluation method for an alloy spray-coated wire and cable bridge based on cable morphology analysis.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] The first aspect of the present invention provides a safety evaluation method for an alloy-sprayed plastic wire and cable tray based on cable morphology analysis, comprising the following steps:

[0006] S102: determining the arrangement and distribution characteristics of the cables on the alloy spray-coated wire and cable tray, and performing a sheath damage analysis on the cables according to the arrangement and distribution characteristics of the cables, and performing a cable operation status analysis on the alloy spray-coated wire and cable tray;

[0007] S104: performing cable adaptation analysis on the alloy-sprayed plastic wire and cable tray in combination with the cable real-time status update graph, and determining the reasons why the alloy-sprayed plastic wire and cable tray is incompatible with the cable based on the cable adaptation analysis results;

[0008] S106: Based on different reasons for abnormal cable adaptation and combined with the real-time cable status update map, the safety and stability of the alloy spray-coated wire and cable tray is evaluated.

[0009] Furthermore, in a preferred embodiment of the present invention, the step S102 is specifically:

[0010] Obtaining a plastic-sprayed alloy wire and cable tray that needs to be safety evaluated, and collecting an arrangement distribution map of cables on the plastic-sprayed alloy wire and cable tray by image acquisition, and calibrating it as a cable arrangement distribution map;

[0011] The cable arrangement distribution diagram is subjected to grayscale processing, wavelet noise reduction processing, and image feature extraction processing to obtain cable arrangement distribution characteristics, and based on the cable arrangement distribution characteristics, the arrangement spacing of the cables on the alloy spray-coated wire and cable tray is calculated, and the bending radius of the cables on the alloy spray-coated wire and cable tray is calculated;

[0012] The qualified arrangement spacing range and qualified bending radius range are preset. If the arrangement spacing or bending radius of the cable on the alloy spray-coated wire and cable tray is not maintained within the corresponding qualified arrangement spacing range and qualified bending radius range, the cable will be marked as an abnormal arrangement cable;

[0013] The image secondary acquisition preprocessing and vector conversion preprocessing are performed on the cables with abnormal arrangement, and the sparse vector value of the outer skin color feature of the cables with abnormal arrangement is calculated. At the same time, the sparse standard vector value of the outer skin color feature of the cable and the standard vector value of the wire color feature coefficient are retrieved by introducing the historical data network;

[0014] Calculate the cosine values ​​of the angles between the sparse vector value of the outer skin color feature of the abnormally arranged cable and the sparse standard vector value of the outer skin color feature of the cable and the standard vector value of the color characteristic coefficient of the conductor, calibrate them as the first cosine value of the angle and the second cosine value of the angle, and preset the standard range value of the first cosine value and the second cosine value of the angle;

[0015] If the cosine value of the first angle is not within the standard range of the cosine value of the first angle, and the cosine value of the second angle is maintained within the standard range of the cosine value of the second angle, it is determined that the abnormally arranged cable has a damaged sheath, and is marked as a cable with damaged sheath and abnormally arranged;

[0016] The cable operation status is analyzed for the cables, and the real-time status of the cables is constructed by combining the cable operation status analysis results, abnormal arrangement cables, and abnormal arrangement cables with damaged outer skins.

[0017] Furthermore, in a preferred embodiment of the present invention, the cable operation status analysis is performed on the cable, and the real-time status of the cable is constructed by combining the cable operation status analysis results, the abnormal arrangement of cables, and the abnormal arrangement of cables with damaged outer skins, specifically:

[0018] Connect a safety monitoring device to the cable on the alloy spray-coated wire and cable tray, wherein the safety monitoring device can monitor the temperature, operating voltage and operating current of the cable in real time;

[0019] Based on the safety monitoring equipment, the cable temperature, operating voltage and operating current are monitored and analyzed in real time to determine whether the cable temperature, operating voltage and operating current are maintained within the preset range;

[0020] Construct a real-time cable status map, if yes, then mark the operation status of the corresponding cable as qualified in the real-time cable status map, if no, mark the operation status of the corresponding cable as unqualified;

[0021] In the real-time cable status map, cables with abnormal arrangement and cables with damaged outer skin are marked, and at the same time, the cables whose operating status is calibrated as unqualified are subjected to short-circuit analysis, short-circuit position positioning and load level monitoring and recording to obtain a real-time cable status update map, wherein the real-time cable status update map records the real-time status of cables at different positions on the alloy spray-coated wire and cable tray in real time.

[0022] Furthermore, in a preferred embodiment of the present invention, the step S104 is specifically:

[0023] Based on the historical data network, determine the standard specification parameters of the alloy sprayed plastic wire and cable tray, and retrieve the standard status of cables at different positions on the alloy sprayed plastic wire and cable tray based on the standard specification parameters of the alloy sprayed plastic wire and cable tray;

[0024] Based on the cable real-time status update map, the real-time status of cables at different positions on the alloy-sprayed wire and cable tray is extracted, and the Euclidean distance method is introduced to calculate the Euclidean distance between the real-time status of cables at different positions on the alloy-sprayed wire and cable tray and the corresponding standard status;

[0025] The positions on the alloy-sprayed plastic wire and cable tray corresponding to the Euclidean distance not less than the preset value are marked as abnormal tray positions, and actual specification parameters are measured at all abnormal tray positions to obtain the actual specification parameters of the abnormal tray positions, and at the same time, based on the standard specification parameters of the alloy-sprayed plastic wire and cable tray, the standard specification parameters of the abnormal tray positions are determined;

[0026] If the actual specification parameters of the abnormal bridge position are not equal to the corresponding standard specification parameters, the reason why the abnormal bridge position and the cable are not compatible is determined to be a specification error, which is marked as the first cable abnormal adaptation reason, and the corresponding abnormal bridge position is marked as a type I abnormal bridge position;

[0027] If the actual specification parameters of the abnormal bridge position are equal to the corresponding standard specification parameters, the reason for the incompatibility between the abnormal bridge position and the cable is judged to be an incorrect installation specification, which is marked as the second cable abnormal adaptation reason, and the corresponding abnormal bridge position is marked as a Class II abnormal bridge position.

[0028] Furthermore, in a preferred embodiment of the present invention, the step S106 is specifically as follows:

[0029] Based on the actual specification parameters of the abnormal bridge position and combined with the real-time cable status update map, a real-time 3D simulation model of the alloy spray-coated wire and cable bridge and cables is constructed and calibrated as the target model;

[0030] Marking the first type of abnormal bridge positions and the second type of abnormal bridge positions on the target model, and updating the map based on the real-time status of the cable to determine the real-time status of the cable at all abnormal bridge positions;

[0031] If the cable is abnormally arranged at the abnormal bridge position, the cable is simulated and arranged at the abnormal bridge position on the target model, and the cable sheath is replaced for the abnormally arranged cable with damaged sheath, and the arrangement analysis simulation time is preset;

[0032] If, within the simulation time of the arrangement analysis, no abnormally arranged cables or cables with damaged outer skin appear at the abnormal bridge position of the target model, the safety and stability of the abnormal bridge position is judged to be qualified;

[0033] If during the arrangement analysis simulation time, there are still abnormally arranged cables and abnormally arranged cables with damaged outer skin at the abnormal bridge position of the target model, the abnormal bridge position is analyzed. If the abnormal bridge position is a Class I abnormal bridge position, load calculation and shape calculation are performed on the Class I abnormal bridge position, and based on the load calculation results and shape calculation results, the Class I abnormal bridge is classified as unqualified in safety and stability.

[0034] Among them, the safety stability failure classification of a type of abnormal bridge includes failure in load safety stability and failure in shape safety stability;

[0035] If the abnormal bridge position is a Class II abnormal bridge position, an installation specification determination is performed on the Class II abnormal bridge position on the target model, wherein the installation specification determination is to determine the installation position, installation angle, looseness of the fixing point, and sealing condition of the Class II abnormal bridge position, and different reasons for failure of installation specification safety and stability are generated according to the installation specification determination result;

[0036] If the cable in the abnormal bridge position is in an unqualified operating state, the safety and stability of the alloy spray-coated wire and cable bridge is evaluated in the target model in combination with the abnormal bridge position.

[0037] Furthermore, in a preferred embodiment of the present invention, if the cable is in an unqualified operating state at an abnormal bridge position, the safety and stability of the alloy sprayed wire and cable bridge is evaluated in the target model in combination with the abnormal bridge position, specifically:

[0038] If the cable at the abnormal bridge position is in an unqualified operating state, the operating states of all cables are adjusted to be qualified on the target model, and the cables are monitored in real time to see if they are still in an unqualified operating state after operation;

[0039] If not, it is judged that the unqualified cable operation status is not related to the abnormal bridge position, and the safety stability of the abnormal bridge position is judged to be qualified;

[0040] If so, the abnormal bridge position is analyzed, and the temperature gradient change rate and real-time electromagnetic intensity of the cable on the abnormal bridge are calculated;

[0041] If the temperature gradient change rate is not within the preset range, the heat dissipation safety and stability assessment of the abnormal bridge position is unqualified;

[0042] A standard value of electromagnetic strength is preset. If the real-time electromagnetic strength is greater than the standard value of electromagnetic strength, the abnormal bridge position is evaluated as failing to meet the electromagnetic interference safety and stability standards.

[0043] The second aspect of the present invention further provides a safety evaluation system for an alloy-sprayed wire and cable tray based on cable morphology analysis, the safety evaluation system comprising a memory and a processor, the memory storing a safety evaluation method, and when the safety evaluation method is executed by the processor, the following steps are implemented:

[0044] Determine the arrangement and distribution characteristics of cables on the alloy spray-coated wire and cable tray, and perform sheath damage analysis on the cables based on the arrangement and distribution characteristics of the cables, and perform cable operation status analysis on the alloy spray-coated wire and cable tray;

[0045] Combined with the real-time cable status update map, cable adaptation analysis is performed on the alloy-sprayed wire and cable tray, and the reasons why the alloy-sprayed wire and cable tray is incompatible with the cable are determined based on the cable adaptation analysis results;

[0046] Based on different reasons for abnormal cable adaptation and combined with the real-time cable status update map, the safety and stability of the alloy spray-coated wire and cable tray is evaluated.

[0047] The present invention solves the technical defects existing in the background technology, and the present invention has the following beneficial effects: cable arrangement distribution analysis and operation status analysis are performed on the alloy spray-coated wire and cable tray, and a cable real-time status update map is constructed based on the analysis results. According to the cable real-time status update map, a cable adaptation analysis is performed on the alloy spray-coated wire and cable tray, the cause of abnormal adaptation of the cable tray is determined, and the safety and stability of the alloy spray-coated wire and cable tray is evaluated based on the cause of abnormal adaptation. The present invention can determine the potential risks of the alloy spray-coated wire and cable tray by the morphology of the cable, and implement safety evaluation based on the potential risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[0049] Figure 1 A flow chart showing a safety evaluation method for alloy spray-coated wire and cable trays based on cable morphology analysis is shown;

[0050] Figure 2 A flow chart of a method for evaluating the safety and stability of an alloy spray-coated wire and cable tray is shown;

[0051] Figure 3 The program view of the alloy spray-coated wire and cable tray safety evaluation system based on cable morphology analysis is shown. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0054] Figure 1 A flow chart of a safety evaluation method for alloy spray-coated wire and cable tray based on cable morphology analysis is shown, comprising the following steps:

[0055] S102: determining the arrangement and distribution characteristics of the cables on the alloy spray-coated wire and cable tray, and performing a sheath damage analysis on the cables according to the arrangement and distribution characteristics of the cables, and performing a cable operation status analysis on the alloy spray-coated wire and cable tray;

[0056] S104: performing cable adaptation analysis on the alloy-sprayed plastic wire and cable tray in combination with the cable real-time status update graph, and determining the reasons why the alloy-sprayed plastic wire and cable tray is incompatible with the cable based on the cable adaptation analysis results;

[0057] S106: Based on different reasons for abnormal cable adaptation and combined with the real-time cable status update map, the safety and stability of the alloy spray-coated wire and cable tray is evaluated.

[0058] Furthermore, in a preferred embodiment of the present invention, the step S102 is specifically:

[0059] Obtaining a plastic-sprayed alloy wire and cable tray that needs to be safety evaluated, and collecting an arrangement distribution map of cables on the plastic-sprayed alloy wire and cable tray by image acquisition, and calibrating it as a cable arrangement distribution map;

[0060] The cable arrangement distribution diagram is subjected to grayscale processing, wavelet noise reduction processing, and image feature extraction processing to obtain cable arrangement distribution characteristics, and based on the cable arrangement distribution characteristics, the arrangement spacing of the cables on the alloy spray-coated wire and cable tray is calculated, and the bending radius of the cables on the alloy spray-coated wire and cable tray is calculated;

[0061] The qualified arrangement spacing range and qualified bending radius range are preset. If the arrangement spacing or bending radius of the cable on the alloy spray-coated wire and cable tray is not maintained within the corresponding qualified arrangement spacing range and qualified bending radius range, the cable will be marked as an abnormal arrangement cable;

[0062] The image secondary acquisition preprocessing and vector conversion preprocessing are performed on the cables with abnormal arrangement, and the sparse vector value of the outer skin color feature of the cables with abnormal arrangement is calculated. At the same time, the sparse standard vector value of the outer skin color feature of the cable and the standard vector value of the wire color feature coefficient are retrieved by introducing the historical data network;

[0063] Calculate the cosine values ​​of the angles between the sparse vector value of the outer skin color feature of the abnormally arranged cable and the sparse standard vector value of the outer skin color feature of the cable and the standard vector value of the color characteristic coefficient of the conductor, calibrate them as the first cosine value of the angle and the second cosine value of the angle, and preset the standard range value of the first cosine value and the second cosine value of the angle;

[0064] If the cosine value of the first angle is not within the standard range of the cosine of the first angle, and the cosine value of the second angle remains within the standard range of the cosine of the second angle, it is determined that the abnormally arranged cable has a damaged sheath and is calibrated as an abnormally arranged cable with damaged sheath.

[0065] It should be noted that on the alloy spray-coated wire and cable tray, there are cables that transmit power, that is, cables, wound and placed. Under normal circumstances, the cables on the tray should be placed in the prescribed arrangement to prevent abnormal winding of the cables, which may cause the cables to be intertwined, or even cause the cables to burn. If there are safety hazards in the tray, such as the specifications of the tray do not meet the standard conditions, or there are problems with the installation specifications of the tray, it will cause the cables to be abnormal, such as cable breakage, outer skin damage, electrical abnormalities, etc. First, the arrangement of the cables on the tray is analyzed, including the analysis of the arrangement spacing and bending radius. The arrangement status of the cables can be judged according to the arrangement spacing and bending radius. Too much or too little distortion will lead to abnormal arrangement, and too much or too little arrangement spacing will also lead to abnormal arrangement. Abnormal arrangement also requires judgment on whether the cable has outer skin damage. The cable in the normal arrangement state will not have outer skin damage. Abnormal arrangement will cause the cable to abnormally contact other positions, accelerating the speed of cable damage. The outer skin color can be analyzed to determine whether the outer skin is damaged. The outer skin color is fixed, and the inner wire color is also fixed. By using the image analysis method, we can determine whether there is outer skin damage at a certain location on the cable surface. We can determine whether the color characteristics of the image are different from the outer skin color characteristics. If they are different, it is initially determined that there is damage, but it may also be other color changes such as oil stains. Therefore, we also determine whether the image color characteristics are the same as the wire color characteristics. If so, it is determined that there is damage at that location. The similarity between vector values ​​can be calculated by analyzing the cosine value of the angle, and then the cable with abnormal outer skin damage arrangement can be obtained.

[0066] Furthermore, in a preferred embodiment of the present invention, the cable operation status analysis is performed on the cable, and the real-time status of the cable is constructed by combining the cable operation status analysis results, the abnormal arrangement of cables, and the abnormal arrangement of cables with damaged outer skins, specifically:

[0067] Connect a safety monitoring device to the cable on the alloy spray-coated wire and cable tray, wherein the safety monitoring device can monitor the temperature, operating voltage and operating current of the cable in real time;

[0068] Based on the safety monitoring equipment, the cable temperature, operating voltage and operating current are monitored and analyzed in real time to determine whether the cable temperature, operating voltage and operating current are maintained within the preset range;

[0069] Construct a real-time cable status map. If yes, the operation status of the corresponding cable is marked as qualified in the real-time cable status map. If no, the operation status of the corresponding cable is marked as unqualified.

[0070] In the real-time cable status map, cables with abnormal arrangement and cables with damaged outer skin are marked, and at the same time, the cables whose operating status is calibrated as unqualified are subjected to short-circuit analysis, short-circuit position positioning and load level monitoring and recording to obtain a real-time cable status update map, wherein the real-time cable status update map records the real-time status of cables at different positions on the alloy spray-coated wire and cable tray in real time.

[0071] It should be noted that the safety monitoring equipment can monitor the temperature, operating voltage and operating current of the cable in real time. The temperature, operating voltage and operating current of the cable may also be caused by problems with the bridge, so it is necessary to determine whether the temperature, operating voltage and operating current of the cable are qualified, that is, whether they are within the standard range. According to the temperature, operating voltage and operating current of the cable, combined with the arrangement order of the cable and the damage of the outer skin, a real-time cable status update map is constructed to locate the abnormal position of the bridge and analyze the safety and stability of the bridge.

[0072] Furthermore, in a preferred embodiment of the present invention, the step S104 is specifically:

[0073] Based on the historical data network, determine the standard specification parameters of the alloy sprayed plastic wire and cable tray, and retrieve the standard status of cables at different positions on the alloy sprayed plastic wire and cable tray based on the standard specification parameters of the alloy sprayed plastic wire and cable tray;

[0074] Based on the cable real-time status update map, the real-time status of cables at different positions on the alloy-sprayed wire and cable tray is extracted, and the Euclidean distance method is introduced to calculate the Euclidean distance between the real-time status of cables at different positions on the alloy-sprayed wire and cable tray and the corresponding standard status;

[0075] The positions on the alloy-sprayed plastic wire and cable tray corresponding to the Euclidean distance not less than the preset value are marked as abnormal tray positions, and actual specification parameters are measured at all abnormal tray positions to obtain the actual specification parameters of the abnormal tray positions, and at the same time, based on the standard specification parameters of the alloy-sprayed plastic wire and cable tray, the standard specification parameters of the abnormal tray positions are determined;

[0076] If the actual specification parameters of the abnormal bridge position are not equal to the corresponding standard specification parameters, the reason why the abnormal bridge position and the cable are not compatible is determined to be a specification error, which is marked as the first cable abnormal adaptation reason, and the corresponding abnormal bridge position is marked as a type I abnormal bridge position;

[0077] If the actual specification parameters of the abnormal bridge position are equal to the corresponding standard specification parameters, the reason for the incompatibility between the abnormal bridge position and the cable is judged to be an incorrect installation specification, which is marked as the second cable abnormal adaptation reason, and the corresponding abnormal bridge position is marked as a Class II abnormal bridge position.

[0078] It should be noted that the standard specification parameters of the alloy spray wire and cable tray can be used to determine the standard state of the cable at different positions of the tray. Because the state of the cable is different under different specification parameters of the tray, the current state and standard state of the cable are obtained according to the specification parameters, and the position where the tray has an abnormality can be judged by comparison, that is, the position where the cable has an abnormal arrangement, damaged outer skin or abnormal operation state. Among them, the comparison state can compare the Euclidean distance between the data. The smaller the Euclidean distance, the higher the data similarity. Therefore, if the Euclidean distance between the data is less than the preset value, it proves that the state of the cable on the corresponding tray does not match the standard state, and it proves that the position is the position that causes the cable abnormality, that is, the abnormal tray position. There may be two problems at the abnormal tray position that cause the cable state to be abnormal, one is the specification error, and the other is the non-standard installation, that is, the installation fixing method is wrong, and there is shaking during installation. According to the comparison of the specification parameters of the tray and the actual parameters, it can be judged whether the cable is wrong in specification or wrong in installation specification, and the abnormal tray position is classified based on the comparison results to obtain a type of abnormal tray position and a type of abnormal tray position. The purpose of classification is that different abnormal forms have different causes for abnormal electrical states, that is, different cable safety and stability.

[0079] Figure 2 A flow chart of a method for evaluating the safety and stability of an alloy spray-coated wire and cable tray is shown, comprising the following steps:

[0080] S202: Based on different reasons for abnormal cable adaptation and combined with the real-time cable status update map, the safety and stability of the alloy spray-coated wire and cable tray is evaluated;

[0081] S204: If the cable in the abnormal bridge position is an unqualified cable in operation, a safety and stability assessment of the alloy spray-coated wire and cable bridge is performed in the target model in combination with the abnormal bridge position.

[0082] Furthermore, in a preferred embodiment of the present invention, the step S202 is specifically:

[0083] Based on the actual specification parameters of the abnormal bridge position and combined with the real-time cable status update map, a real-time 3D simulation model of the alloy spray-coated wire and cable bridge and cables is constructed and calibrated as the target model;

[0084] Marking the first type of abnormal bridge positions and the second type of abnormal bridge positions on the target model, and updating the map based on the real-time status of the cable to determine the real-time status of the cable at all abnormal bridge positions;

[0085] If the cable is abnormally arranged at the abnormal bridge position, the cable is simulated and arranged at the abnormal bridge position on the target model, and the cable sheath is replaced for the abnormally arranged cable with damaged sheath, and the arrangement analysis simulation time is preset;

[0086] If, within the simulation time of the arrangement analysis, no abnormally arranged cables or cables with damaged outer skin appear at the abnormal bridge position of the target model, the safety and stability of the abnormal bridge position is judged to be qualified;

[0087] If during the arrangement analysis simulation time, there are still abnormally arranged cables and abnormally arranged cables with damaged outer skin at the abnormal bridge position of the target model, the abnormal bridge position is analyzed. If the abnormal bridge position is a Class I abnormal bridge position, load calculation and shape calculation are performed on the Class I abnormal bridge position, and based on the load calculation results and shape calculation results, the Class I abnormal bridge is classified as unqualified in safety and stability.

[0088] Among them, the safety stability failure classification of a type of abnormal bridge includes failure in load safety stability and failure in shape safety stability;

[0089] If the abnormal bridge position is a Class II abnormal bridge position, an installation specification determination is performed on the Class II abnormal bridge position on the target model, wherein the installation specification determination is to determine the installation position, installation angle, looseness of fixing points and sealing condition of the Class II abnormal bridge position, and different reasons for failure of installation specification safety and stability are generated according to the installation specification determination results.

[0090] It should be noted that simulation analysis can be achieved through the model, reducing the harm caused by actual operation. At the same time, the similarity between high-level simulation and actual operation is the same, and the processing efficiency is faster. Construct a target model, and the arrangement and damage state of the cables on the target model, the actual specifications and installation methods of the bridge are the same as the actual ones. For cables with abnormal arrangement, it is first necessary to repair the cables with damaged outer skins to prevent the cables from continuing to run and causing short circuit fires. The simulation of the cable relocation is performed on the model to determine whether the abnormal cable arrangement is related to the abnormal bridge. If the cable arrangement is no longer abnormal after the cable is relocated, it proves that the cable arrangement is not related to the abnormal bridge, that is, it is judged that the abnormal bridge will not affect the cable arrangement. At this time, the safety and stability of the abnormal bridge position will be judged to be qualified. If the cable arrangement continues to be abnormal after the cable is relocated, it is judged that the cable arrangement is related to the abnormal bridge. At this time, classification analysis is required to judge the abnormal state of the bridge. If it is a type of abnormal bridge position, it is judged that the bridge has abnormal load or shape, so that the specifications are problematic, resulting in the bridge being unable to bear the cable, and abnormal cable arrangement. If it is a Class II abnormal bridge position, it is judged as an installation specification abnormality. The installation specifications include the installation position, installation angle, looseness of the fixing points, and sealing conditions. The above abnormalities will lead to abnormal arrangement, so different reasons for failure to meet the installation specification safety and stability are generated based on the installation specification judgment results.

[0091] Furthermore, in a preferred embodiment of the present invention, the step S204 is specifically:

[0092] If the cable at the abnormal bridge position is in an unqualified operating state, the operating states of all cables are adjusted to be qualified on the target model, and the cables are monitored in real time to see if they are still in an unqualified operating state after operation;

[0093] If not, it is judged that the unqualified cable operation status is not related to the abnormal bridge position, and the safety stability of the abnormal bridge position is judged to be qualified;

[0094] If so, the abnormal bridge position is analyzed, and the temperature gradient change rate and real-time electromagnetic intensity of the cable on the abnormal bridge are calculated;

[0095] If the temperature gradient change rate is not within the preset range, the heat dissipation safety and stability assessment of the abnormal bridge position is unqualified;

[0096] A standard value of electromagnetic strength is preset. If the real-time electromagnetic strength is greater than the standard value of electromagnetic strength, the abnormal bridge position is evaluated as failing to meet the electromagnetic interference safety and stability standards.

[0097] It should be noted that for cables with unqualified operating conditions, that is, cables with short circuit overload and other conditions, it is necessary to adjust the operating conditions of all cables to qualified conditions, and monitor in real time whether the cables are still unqualified in operating conditions after operation, so as to determine whether the operating conditions are unqualified due to abnormal bridges. Otherwise, if the cable is in an unqualified operating condition due to external factors, it has nothing to do with the bridge. The safety and stability of the bridge are qualified, otherwise it is related to the bridge. The bridge may have a structure that is too compact during installation, which limits the heat dissipation area of ​​the cable, causing the cable temperature to rise, resulting in a phenomenon of cable overheating causing short circuit overload, which can be judged from the temperature gradient change rate. At the same time, if the bridge gap is not installed in a standardized manner, the cable will have insufficient electrical clearance, resulting in discharge in the cable, causing an increase in electromagnetic intensity, and thus causing a short circuit. Therefore, the bridge is evaluated based on the electromagnetic intensity and the temperature gradient change rate.

[0098] In addition, the safety evaluation method of the alloy spray-coated wire and cable tray based on cable morphology analysis also includes the following steps:

[0099] If there is an abnormal bridge position in the alloy spray-coated wire and cable bridge, the abnormal bridge position range is evaluated, and all potential harmful events at the abnormal bridge position are retrieved based on the abnormal bridge position range in the big data network;

[0100] Based on all potential harmful events at abnormal bridge positions, a risk matrix is ​​constructed, and L values ​​are set for all potential harmful events at abnormal bridge positions in the risk matrix, where the L value is the historical probability of potential harmful events occurring at abnormal bridge positions on the alloy spray-coated wire and cable bridge;

[0101] Retrieve the hazard range of different potential hazard events and conduct quantitative assessment, and assign S value to the abnormal bridge position based on the quantitative assessment result, where S value is the hazard range of the potential hazard time when the abnormal bridge position on the alloy spray-coated wire and cable bridge appears;

[0102] Multiply the L value and S value of different potential hazard events at the abnormal bridge position to obtain the R value, and sort the R value in reverse order to construct a pecking order table for the abnormal bridge position processing. If there are multiple abnormal bridge positions on the alloy spray-coated wire and cable bridge, then based on the pecking order table for the abnormal bridge position processing, perform safety inspections on different abnormal bridge positions in sequence.

[0103] It should be noted that problems at different locations on the bridge will not only harm the cables, but may even directly cause the bridge to collapse, etc., so it is necessary to obtain all potential hazard events and inspect them. The impact range and probability of the hazard are different. According to the impact range and probability of the hazard, it is necessary to determine the maintenance order of all locations to achieve efficient bridge location maintenance. Through the risk matrix method, the L value and S value of different potential hazard events at abnormal bridge locations are calculated, and the R value is multiplied. The abnormal bridge locations are sorted according to the R value to obtain a sorting table. According to the sorting table, the importance of repairing the bridge is determined.

[0104] like Figure 3 As shown, the second aspect of the present invention also provides an alloy spray-coated wire and cable tray safety evaluation system based on cable morphology analysis, the safety evaluation system includes a memory 31 and a processor 32, the memory 31 stores a safety evaluation method, and when the safety evaluation method is executed by the processor 32, the following steps are implemented:

[0105] Determine the arrangement and distribution characteristics of cables on the alloy spray-coated wire and cable tray, and perform sheath damage analysis on the cables based on the arrangement and distribution characteristics of the cables, and perform cable operation status analysis on the alloy spray-coated wire and cable tray;

[0106] Combined with the real-time cable status update map, cable adaptation analysis is performed on the alloy-sprayed wire and cable tray, and the reasons why the alloy-sprayed wire and cable tray is incompatible with the cable are determined based on the cable adaptation analysis results;

[0107] Based on different reasons for abnormal cable adaptation and combined with the real-time cable status update map, the safety and stability of the alloy spray-coated wire and cable tray is evaluated.

[0108] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A safety evaluation method for alloy spray-coated wire and cable trays based on cable morphology analysis, characterized in that: The following steps are involved: S102: determining the arrangement and distribution characteristics of the cables on the alloy spray-coated wire and cable tray, and performing a sheath damage analysis on the cables according to the arrangement and distribution characteristics of the cables, and performing a cable operation status analysis on the alloy spray-coated wire and cable tray; S104: performing cable adaptation analysis on the alloy-sprayed plastic wire and cable tray in combination with the cable real-time status update graph, and determining the reasons why the alloy-sprayed plastic wire and cable tray is incompatible with the cable based on the cable adaptation analysis results; S106: Based on different reasons for abnormal cable adaptation and combined with the real-time cable status update map, the safety and stability of the alloy spray-coated wire and cable tray is evaluated.

2. The safety evaluation method for alloy spray-coated wire and cable tray based on cable morphology analysis according to claim 1 is characterized in that: The S102 is specifically: Obtaining a plastic-sprayed alloy wire and cable tray that needs to be safety evaluated, and collecting an arrangement distribution map of cables on the plastic-sprayed alloy wire and cable tray by image acquisition, and calibrating it as a cable arrangement distribution map; The cable arrangement distribution diagram is subjected to grayscale processing, wavelet noise reduction processing, and image feature extraction processing to obtain cable arrangement distribution characteristics, and based on the cable arrangement distribution characteristics, the arrangement spacing of the cables on the alloy spray-coated wire and cable tray is calculated, and the bending radius of the cables on the alloy spray-coated wire and cable tray is calculated; The qualified arrangement spacing range and qualified bending radius range are preset. If the arrangement spacing or bending radius of the cable on the alloy spray-coated wire and cable tray is not maintained within the corresponding qualified arrangement spacing range and qualified bending radius range, the cable will be marked as an abnormal arrangement cable; The image secondary acquisition preprocessing and vector conversion preprocessing are performed on the cables with abnormal arrangement, and the sparse vector value of the outer skin color feature of the cables with abnormal arrangement is calculated. At the same time, the sparse standard vector value of the outer skin color feature of the cable and the standard vector value of the wire color feature coefficient are retrieved by introducing the historical data network; Calculate the cosine values ​​of the angles between the sparse vector value of the outer skin color feature of the abnormally arranged cable and the sparse standard vector value of the outer skin color feature of the cable and the standard vector value of the color characteristic coefficient of the conductor, calibrate them as the first cosine value of the angle and the second cosine value of the angle, and preset the standard range value of the first cosine value and the second cosine value of the angle; If the cosine value of the first angle is not within the standard range of the cosine value of the first angle, and the cosine value of the second angle is maintained within the standard range of the cosine value of the second angle, it is determined that the abnormally arranged cable has a damaged sheath, and is marked as a cable with damaged sheath and abnormally arranged; The cable operation status is analyzed for the cables, and the real-time status of the cables is constructed by combining the cable operation status analysis results, abnormal arrangement cables, and abnormal arrangement cables with damaged outer skins.

3. The safety evaluation method for alloy spray-coated wire and cable tray based on cable morphology analysis according to claim 2 is characterized in that: The cable operation status analysis is performed on the cable, and the real-time status of the cable is constructed by combining the cable operation status analysis results, the abnormal arrangement of cables, and the abnormal arrangement of cables with damaged outer skins, specifically: Connect a safety monitoring device to the cable on the alloy spray-coated wire and cable tray, wherein the safety monitoring device can monitor the temperature, operating voltage and operating current of the cable in real time; Based on the safety monitoring equipment, the cable temperature, operating voltage and operating current are monitored and analyzed in real time to determine whether the cable temperature, operating voltage and operating current are maintained within the preset range; Construct a real-time cable status map. If yes, the operation status of the corresponding cable is marked as qualified in the real-time cable status map. If no, the operation status of the corresponding cable is marked as unqualified. In the real-time cable status map, cables with abnormal arrangement and cables with damaged outer skin are marked, and cables with unqualified operating status are subjected to short-circuit analysis, short-circuit position location, and load level monitoring and recording through safety monitoring equipment to obtain a real-time cable status update map, wherein the real-time status of cables at different positions on the alloy spray-coated wire and cable tray is recorded in real time.

4. The safety evaluation method for alloy spray-coated wire and cable tray based on cable morphology analysis according to claim 1 is characterized in that: The S104 is specifically: Based on the historical data network, determine the standard specification parameters of the alloy sprayed plastic wire and cable tray, and retrieve the standard status of cables at different positions on the alloy sprayed plastic wire and cable tray based on the standard specification parameters of the alloy sprayed plastic wire and cable tray; Based on the cable real-time status update map, the real-time status of cables at different positions on the alloy-sprayed wire and cable tray is extracted, and the Euclidean distance method is introduced to calculate the Euclidean distance between the real-time status of cables at different positions on the alloy-sprayed wire and cable tray and the corresponding standard status; The positions on the alloy-sprayed plastic wire and cable tray corresponding to the Euclidean distance not less than the preset value are marked as abnormal tray positions, and actual specification parameters are measured at all abnormal tray positions to obtain the actual specification parameters of the abnormal tray positions, and at the same time, based on the standard specification parameters of the alloy-sprayed plastic wire and cable tray, the standard specification parameters of the abnormal tray positions are determined; If the actual specification parameters of the abnormal bridge position are not equal to the corresponding standard specification parameters, the reason why the abnormal bridge position and the cable are not compatible is determined to be a specification error, which is marked as the first cable abnormal adaptation reason, and the corresponding abnormal bridge position is marked as a type I abnormal bridge position; If the actual specification parameters of the abnormal bridge position are equal to the corresponding standard specification parameters, the reason for the incompatibility between the abnormal bridge position and the cable is judged to be an incorrect installation specification, which is marked as the second cable abnormal adaptation reason, and the corresponding abnormal bridge position is marked as a Class II abnormal bridge position.

5. The safety evaluation method for alloy spray-coated wire and cable tray based on cable morphology analysis according to claim 4 is characterized in that: The S106 is specifically: Based on the actual specification parameters of the abnormal bridge position and combined with the real-time cable status update map, a real-time 3D simulation model of the alloy spray-coated wire and cable bridge and cables is constructed and calibrated as the target model; Marking the first type of abnormal bridge positions and the second type of abnormal bridge positions on the target model, and updating the map based on the real-time status of the cable to determine the real-time status of the cable at all abnormal bridge positions; If the cable is abnormally arranged at the abnormal bridge position, the cable is simulated and arranged at the abnormal bridge position on the target model, and the cable sheath is replaced for the abnormally arranged cable with damaged sheath, and the arrangement analysis simulation time is preset; If, within the simulation time of the arrangement analysis, no abnormally arranged cables or cables with damaged outer skin appear at the abnormal bridge position of the target model, the safety and stability of the abnormal bridge position is judged to be qualified; If during the arrangement analysis simulation time, cables with abnormal arrangement and cables with damaged outer skin still appear at the abnormal bridge position of the target model, the abnormal bridge position is analyzed. If the abnormal bridge position is a type I abnormal bridge position, load calculation and shape calculation are performed on the type I abnormal bridge position, and based on the load calculation results and shape calculation results, the type I abnormal bridge is classified as unqualified in terms of safety and stability. Among them, the safety stability failure classification of a type of abnormal bridge includes failure in load safety stability and failure in shape safety stability; If the abnormal bridge position is a Class II abnormal bridge position, an installation specification determination is performed on the Class II abnormal bridge position on the target model, wherein the installation specification determination is to determine the installation position, installation angle, looseness of the fixing point, and sealing condition of the Class II abnormal bridge position, and different reasons for failure of installation specification safety and stability are generated according to the installation specification determination result; If the cable in the abnormal bridge position is in an unqualified operating state, the safety and stability of the alloy spray-coated wire and cable bridge is evaluated in the target model in combination with the abnormal bridge position.

6. The safety evaluation method for alloy spray-coated wire and cable tray based on cable morphology analysis according to claim 5 is characterized in that: If the cable is in an unqualified operating state at the abnormal bridge position, the safety and stability of the alloy spray-coated wire and cable bridge is evaluated in the target model in combination with the abnormal bridge position, specifically: If the cable at the abnormal bridge position is in an unqualified operating state, the operating states of all cables are adjusted to be qualified on the target model, and the cables are monitored in real time to see if they are still in an unqualified operating state after operation; If not, it is judged that the unqualified cable operation status is not related to the abnormal bridge position, and the safety stability of the abnormal bridge position is judged to be qualified; If so, the abnormal bridge position is analyzed, and the temperature gradient change rate and real-time electromagnetic intensity of the cable on the abnormal bridge are calculated; If the temperature gradient change rate is not within the preset range, the heat dissipation safety and stability assessment of the abnormal bridge position is unqualified; A standard value of electromagnetic strength is preset. If the real-time electromagnetic strength is greater than the standard value of electromagnetic strength, the abnormal bridge position is evaluated as failing to meet the electromagnetic interference safety and stability standards.

7. The alloy spray-coated wire and cable tray safety evaluation system based on cable morphology analysis is characterized by: The safety evaluation system includes a memory and a processor, wherein a safety evaluation method program is stored in the memory, and when the safety evaluation method program is executed by the processor, the safety evaluation method steps as described in any one of claims 1 to 6 are implemented.

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