A cable assembly management method, system, electronic device and readable storage medium

Abstract

The application discloses a kind of cable assembly management method, system, electronic equipment and readable storage medium, it is related to rail transit field, the cable assembly management method includes: obtaining the historical operation information of each motor train unit, according to the historical operation information determines the failure rate of each roof terminal;The roof terminal with failure rate higher than preset threshold is determined as the roof terminal to be replaced;Determine the target roof terminal corresponding to the roof terminal to be replaced;Every time it is overhauled, the replacement operation is carried out to the roof terminal to be replaced, and the replacement operation includes separating the roof terminal to be replaced from cable, and connecting target roof terminal with cable.This application can reduce the possibility of roof terminal failure, improve the stability and reliability of high-voltage cable assembly, while only replacing the roof terminal in cable assembly, retaining the original cable and under-car terminal, solving the problem of overall replacement of cable assembly due to terminal insulation performance degradation, improving the economy of cable assembly application.

Description

Technical Field

[0001] This application relates to the field of rail transportation, and in particular to a cable assembly management method, system, electronic device, and readable storage medium. Background Technology

[0002] As the mileage and operating time of high-speed trains increase, the cable terminals of the high-voltage cable assemblies are constantly exposed on the roof and are subject to long-term environmental factors (wind, sand, rain, ultraviolet radiation, etc.), which increases the failure rate. When a cable terminal fails, the entire high-voltage cable assembly needs to be replaced. In some cases, the interior of the high-speed train needs to be removed and the high-voltage equipment box lowered before the high-voltage cable assembly can be replaced. This results in a long replacement cycle and affects the operation of the high-speed train.

[0003] Therefore, how to provide a solution to the above-mentioned technical problems is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] The purpose of this application is to provide a cable assembly management method, system, electronic device, and readable storage medium that can reduce the possibility of rooftop terminal failure, improve the stability and reliability of high-voltage cable assemblies, and improve the economic efficiency of cable assembly application by only replacing the rooftop terminal in the cable assembly.

[0005] To address the aforementioned technical problems, this application provides a cable assembly management method, comprising:

[0006] Obtain historical operating information for each EMU and determine the failure rate of each rooftop terminal based on the historical operating information;

[0007] The roof terminals with a failure rate higher than a preset threshold are identified as roof terminals to be replaced.

[0008] Determine the target roof terminal corresponding to the roof terminal to be replaced;

[0009] At each maintenance interval, a replacement operation is performed on the roof terminal to be replaced. The replacement operation includes separating the roof terminal to be replaced from the cable and connecting the target roof terminal to the cable.

[0010] Optionally, the process of separating the roof terminal to be replaced from the cable includes:

[0011] The outer skirt and each layer of heat shrink tubing of the roof terminal to be replaced are removed layer by layer to separate the roof terminal to be replaced from the cable.

[0012] Optionally, the process of connecting the target roof terminal to the cable includes:

[0013] Inspect the insulation surface of the cable for damage;

[0014] If not, heat shrink the target roof terminal and the cable.

[0015] Optionally, the process of heat-shrinking the target roof terminal with the cable includes:

[0016] Determine the target cutting position of the cable, which is a predetermined distance downward from the insulation break of the cable;

[0017] The target roof terminal is heat-shrinked with the cable at the target cut position.

[0018] Optionally, the maintenance time includes a first maintenance time corresponding to advanced maintenance or a second maintenance time corresponding to half of the life cycle.

[0019] Optionally, after connecting the target roof terminal to the cable, the cable assembly management method further includes:

[0020] Electrical testing is performed on the new cable assembly obtained by connecting the target roof terminal and the cable;

[0021] Obtain the test results of the new cable assembly, the test results including pass or fail;

[0022] The new cable assembly that passes the test is identified as the cable assembly to be installed on the vehicle.

[0023] Optionally, the electrical testing includes insulation withstand voltage testing and / or partial discharge testing;

[0024] The process of obtaining the test results of the new cable assembly includes:

[0025] Obtain the first test result corresponding to the insulation withstand voltage test and the second test result corresponding to the partial discharge test of the new cable assembly; both the first test result and the second test result include pass or fail;

[0026] The new cable assembly whose first and second test results are both passed is identified as the cable assembly to be installed on the vehicle.

[0027] To address the aforementioned technical problems, this application also provides a cable assembly management system, comprising:

[0028] The acquisition module is used to acquire historical operating information of each EMU and determine the failure rate of each roof terminal based on the historical operating information.

[0029] The first determining module is used to determine the roof terminal with a failure rate higher than a preset threshold as a roof terminal to be replaced.

[0030] The second determining module is used to determine the target roof terminal corresponding to the roof terminal to be replaced.

[0031] The replacement module is used to perform a replacement operation on the roof terminal to be replaced every maintenance time. The replacement operation includes separating the roof terminal to be replaced from the cable and connecting the target roof terminal to the cable.

[0032] To address the aforementioned technical problems, this application also provides an electronic device, comprising:

[0033] Memory, used to store computer programs;

[0034] A processor, configured to implement the steps of the cable assembly management method as described in any of the preceding descriptions when executing the computer program.

[0035] To address the aforementioned technical problems, this application also provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the cable assembly management method described in any of the above claims.

[0036] This application also provides a cable assembly management method, which replaces the roof terminals with high failure rates at each scheduled maintenance interval, thereby reducing the possibility of roof terminal failure and improving the stability and reliability of the high-voltage cable assembly. Furthermore, by replacing only the roof terminals within the cable assembly while retaining the original cables and under-vehicle terminals, it solves the problem of needing to replace the entire cable assembly due to deterioration in terminal insulation performance, thus improving the economic efficiency of cable assembly application. This application also provides a cable assembly management system, electronic equipment, and computer-readable storage medium, which have the same beneficial effects as the aforementioned cable assembly management method. Attached Figure Description

[0037] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 A flowchart of the steps of a cable assembly management method provided in this application;

[0039] Figure 2 This is a schematic diagram of the internal structure of an SCTM-type rooftop terminal.

[0040] Figure 3 This is a schematic diagram of the internal structure of a zinc oxide-type roof terminal.

[0041] Figure 4 A schematic diagram illustrating the replacement of a rooftop terminal provided in this application;

[0042] Figure 5 A schematic diagram illustrating the replacement of another roof-mounted terminal provided in this application;

[0043] Figure 6 This is a schematic diagram of the structure of a cable assembly management system provided in this application. Detailed Implementation

[0044] The core of this application is to provide a cable assembly management method, system, electronic device, and readable storage medium that can reduce the possibility of rooftop terminal failure, improve the stability and reliability of high-voltage cable assemblies, and improve the economic efficiency of cable assembly application by only replacing the rooftop terminal in the cable assembly.

[0045] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] Firstly, please refer to Figure 1 , Figure 1 The present application provides a flowchart of a cable assembly management method, which includes:

[0047] S101: Obtain historical operating information for each EMU and determine the failure rate of each rooftop terminal based on the historical operating information;

[0048] S102: Identify roof terminals with a failure rate higher than a preset threshold as roof terminals to be replaced.

[0049] In this embodiment, the historical operating information of each EMU before the maintenance time can be obtained when the maintenance time is reached, or the historical operating information of each EMU within the current maintenance cycle can be obtained.

[0050] The historical operation information includes, but is not limited to, the usage information of the rooftop terminals of each EMU. The usage information includes the number of failures of different types of rooftop terminals in each cumulative operating range. For example, in the range of 0-1.8 million kilometers, the rooftop terminals have accumulated 184.03 million kilometers of operation. The SCTM type rooftop terminals have experienced 3 failures, with a failure rate of 0.012 per million kilometers. The zinc oxide type rooftop terminals have not experienced any failures. In the range of 2.4-3 million kilometers, the rooftop terminals have accumulated 37.139 million kilometers of operation. The SCTM type rooftop terminals have experienced 2 failures, with a failure rate of 0.05 per million kilometers. The zinc oxide type terminals have not experienced any failures.

[0051] Based on the historical operating information of each EMU, the number of times each roof terminal has failed is determined, thereby determining the failure rate of each roof terminal. Roof terminals with failure rates higher than a preset threshold are identified as roof terminals to be replaced.

[0052] In some embodiments, the roof terminals to be replaced can also be determined based on the location of the roof terminals with higher failure rates. For example, assuming that the train sets include EMU 1, EMU 2, EMU 3, EMU 4, and EMU 5, and EMU 1 to 5 are EMUs of the same type, wherein the failure rate of the roof terminals in area A of EMUs 1, 2, and 3 is higher than a preset threshold, then even if the failure rate of the roof terminals in area A of EMUs 4 and 5 is not higher than the preset threshold, the roof terminals in area A will still be determined as roof terminals to be replaced.

[0053] S103: Determine the target roof terminal corresponding to the roof terminal to be replaced;

[0054] It is understood that the target roof terminal corresponding to the roof terminal to be replaced can be a roof terminal of the same type as the roof terminal to be replaced, or it can be a roof terminal with better performance than the roof terminal to be replaced. For example, assuming that the roof terminal to be replaced is an SCTM type roof terminal, then the target roof terminal can be an SCTM type roof terminal or a zinc oxide type roof terminal.

[0055] S104: At each maintenance interval, a replacement operation shall be performed on the roof terminal to be replaced. The replacement operation includes disconnecting the roof terminal to be replaced from the cable and connecting the target roof terminal to the cable.

[0056] In this embodiment, each time the maintenance time is reached, the roof terminal to be replaced is replaced with a new target roof terminal. It can be understood that the cable assembly includes the roof terminal, the cable and the under-vehicle terminal connected in sequence. When the maintenance time is reached, the roof terminal to be replaced and the cable are cut and separated, and the target roof terminal is connected to the cable to obtain a new cable assembly. In this embodiment, when replacing the roof terminal, only the roof terminal is replaced, and there is no need to replace the cable and the under-vehicle terminal, which solves the problem that the entire high-voltage cable assembly needs to be replaced after the cable terminal fails.

[0057] The maintenance time can be either the first maintenance time corresponding to a high-level maintenance or the second maintenance time corresponding to a half-life cycle. The interval between the two maintenance times can be set according to the actual engineering needs, as long as the possibility of failure of the roof terminal is reduced. This embodiment does not make specific limitations here.

[0058] As can be seen, in this embodiment, the roof terminal with a high failure rate is replaced every time the maintenance time is reached, thereby reducing the possibility of roof terminal failure and improving the stability and reliability of the high-voltage cable assembly. At the same time, only the roof terminal in the cable assembly is replaced, while the original cable and the under-vehicle terminal are retained, which solves the problem of the need to replace the entire cable assembly due to the decline in the insulation performance of the terminal, and improves the economic efficiency of the cable assembly application.

[0059] Based on the above embodiments:

[0060] In some embodiments, the process of disconnecting the roof terminal to be replaced from the cable includes:

[0061] Remove the outer skirt and each layer of heat shrink tubing of the roof terminal to be replaced layer by layer to separate the roof terminal from the cable.

[0062] In some embodiments, the process of connecting the target roof terminal to the cable includes:

[0063] Inspect the cable insulation surface for damage;

[0064] If not, heat shrink the target roof terminal and cable.

[0065] In some embodiments, the process of heat-shrinking the target roof terminal and the cable includes:

[0066] Determine the target cutting position of the cable, which is a preset distance downward from the insulation break in the cable;

[0067] Heat shrink the target roof terminal with the cable at the target cut position.

[0068] This embodiment describes the replacement operation of the roof terminal to be replaced. Please refer to [link / reference]. Figure 2 , Figure 2This is a schematic diagram of the internal structure of an SCTM-type rooftop terminal. Please refer to [the diagram]. Figure 3 , Figure 3 This is a schematic diagram of the internal structure of a zinc oxide type roof terminal. The roof terminal to be replaced includes, but is not limited to, SCTM type roof terminals or zinc oxide type roof terminals. The process of separating the roof terminal to be replaced from the cable includes removing the outer skirt and each layer of heat shrink tubing (insulating tubing, pressure control tubing, etc.) of the roof terminal layer by layer, cutting the roof terminal to be replaced from the cable, and connecting the target roof terminal to the cable includes cleaning and checking the cable insulation surface for damage, and then re-heat shrinking the insulation tubing and pressure control tubing required for the original type of roof terminal (SCTM terminal), or re-heat shrinking a terminal with better electrical performance (such as a zinc oxide type terminal).

[0069] When the target roof terminal is a zinc oxide type roof terminal, the replacement process specifically includes: a predetermined distance downwards from the cable insulation break point serves as the final cut point of the cable conductor during the fabrication of the new terminal (zinc oxide terminals use different top terminals, so a predetermined distance is reserved for re-crimping the terminals; if the SCTM type terminal is to be used, there is no need to replace the top terminal), to ensure that the original six cable shielding copper wires meet the length requirements of the new terminal's manufacturing process. Figure 4 As shown, the preset distance can be set to 40mm. Arrange the cable metal shield folded onto the cable sheath, determine the cable sheath cutting position, and then, following the zinc oxide terminal installation process, sequentially cut the cable sheath, arrange the copper wire shield, remove the semi-conductive insulation layer, strip the cable insulation, polish and clean the insulation, and install the zinc oxide terminal until the zinc oxide terminal support tube is fully retracted. Figure 5 As shown.

[0070] In some embodiments, after connecting the target roof terminal to the cable, the cable assembly management method further includes:

[0071] Electrical testing is performed on the new cable assembly obtained after connecting the target roof terminal and the cable;

[0072] Obtain the test results for the new cable assembly, including whether it passed or failed;

[0073] New cable assemblies that pass the test are identified as cable assemblies to be installed on the vehicle.

[0074] In some embodiments, electrical testing includes insulation withstand voltage testing and / or partial discharge testing;

[0075] The process of obtaining test results for new cable assemblies includes:

[0076] Obtain the first test result corresponding to the insulation withstand voltage test and the second test result corresponding to the partial discharge test for the new cable assembly; both the first test result and the second test result include pass or fail;

[0077] The new cable assembly that passes both the first and second tests is identified as the cable assembly to be installed on the vehicle.

[0078] To improve the operational safety of high-speed trains, after replacing the target roof terminal, the new cable assemblies must undergo electrical testing before being installed on the train. Specifically, the re-heat-shrinkable cable assemblies must be tested according to the power frequency withstand voltage test (48kV, 1min) and partial discharge test (<5pC@37.5kV). Only after passing the tests can they be installed on the train. The partial discharge test is mainly used to detect local defects in the insulation layer of high-voltage cables. A high voltage of 37.5kV is applied to one end of the new cable assembly (with an equalizing nut installed), while the other end is left unloaded (with an equalizing nut installed). The grounding wire of the cable assembly under test is connected to a dedicated grounding point, and the insulation quality is determined by whether the partial discharge exceeds the standard (<5pC). The ultra-high voltage withstand voltage test is mainly used to verify the overvoltage resistance of the high-voltage cable assembly. A high voltage of 48kV is applied to one end of the cable (with an equalizing nut installed), while the other end is left unloaded (with an equalizing nut installed), and the test is conducted for 1min, observing for any flashover or breakdown.

[0079] In summary, this application solves the problem of decreased reliability and increased failure rate of high-voltage cable assembly terminals in high-speed trains by replacing the cable assembly roof terminals, thereby improving the stability and reliability of the high-voltage cable assemblies. At the same time, by only replacing the cable assembly roof terminals and retaining the original cable assembly cables and undercarriage terminals, the problem of needing to replace the entire cable assembly due to the decline in terminal insulation performance is solved, thus improving the economic efficiency of cable assembly application.

[0080] Secondly, please refer to Figure 6 , Figure 6 This application provides a schematic diagram of a cable assembly management system, which includes:

[0081] The acquisition module 61 is used to acquire historical operating information of each EMU and determine the failure rate of each roof terminal based on the historical operating information.

[0082] The first determining module 62 is used to determine roof terminals with a failure rate higher than a preset threshold as roof terminals to be replaced.

[0083] The second determining module 63 is used to determine the target roof terminal corresponding to the roof terminal to be replaced.

[0084] Replacement module 64 is used to perform a replacement operation on the roof terminal to be replaced each time maintenance is completed. The replacement operation includes separating the roof terminal to be replaced from the cable and connecting the target roof terminal to the cable.

[0085] As can be seen, in this embodiment, the roof terminal with a high failure rate is replaced every time the maintenance time is reached, thereby reducing the possibility of roof terminal failure and improving the stability and reliability of the high-voltage cable assembly. At the same time, only the roof terminal in the cable assembly is replaced, while the original cable and the under-vehicle terminal are retained, which solves the problem of the need to replace the entire cable assembly due to the decline in the insulation performance of the terminal, and improves the economic efficiency of the cable assembly application.

[0086] In some embodiments, the process of disconnecting the roof terminal to be replaced from the cable includes:

[0087] Remove the outer skirt and each layer of heat shrink tubing of the roof terminal to be replaced layer by layer to separate the roof terminal from the cable.

[0088] In some embodiments, the process of connecting the target roof terminal to the cable includes:

[0089] Inspect the cable insulation surface for damage;

[0090] If not, heat shrink the target roof terminal and cable.

[0091] In some embodiments, the process of heat-shrinking the target roof terminal and the cable includes:

[0092] Determine the target cut position of the cable, which is a preset distance downward from the insulation break in the cable;

[0093] Heat shrink the target roof terminal with the cable at the target cut position.

[0094] In some embodiments, the maintenance time includes a first maintenance time corresponding to a high-level maintenance or a second maintenance time corresponding to a half-life cycle.

[0095] In some embodiments, the target rooftop terminal cable assembly management system further includes:

[0096] The detection module is used to perform electrical testing on the new cable assembly obtained after connecting the target roof terminal and the cable, and to obtain the detection results of the new cable assembly, including whether it passes or fails.

[0097] The third determination module is used to identify new cable assemblies that pass the test as cable assemblies to be installed on the vehicle.

[0098] In some embodiments, electrical testing includes insulation withstand voltage testing and / or partial discharge testing;

[0099] The process of obtaining test results for new cable assemblies includes:

[0100] Obtain the first test result corresponding to the insulation withstand voltage test and the second test result corresponding to the partial discharge test for the new cable assembly; both the first test result and the second test result include pass or fail;

[0101] The new cable assembly that passes both the first and second tests is identified as the cable assembly to be installed on the vehicle.

[0102] Thirdly, this application also provides an electronic device, including:

[0103] Memory, used to store computer programs;

[0104] A processor for executing a computer program to implement the steps of the cable assembly management method as described in any of the embodiments above.

[0105] Of course, electronic devices may also include various network interfaces, power supplies, and other components.

[0106] For a description of the electronic device provided in this application, please refer to the above embodiments; further details will not be repeated here.

[0107] The electronic device provided in this application has the same beneficial effects as the cable assembly management method described above.

[0108] Fourthly, this application also provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the cable assembly management method as described in any of the embodiments above.

[0109] The computer-readable storage medium may include various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0110] For a description of the computer-readable storage medium provided in this application, please refer to the above embodiments; further details will not be repeated here.

[0111] The computer-readable storage medium provided in this application has the same beneficial effects as the cable assembly management method described above.

[0112] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0113] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A cable assembly management method, characterized in that, include: Obtain historical operating information for each EMU and determine the failure rate of each rooftop terminal based on the historical operating information; The roof terminals with a failure rate higher than a preset threshold are identified as roof terminals to be replaced. Determine the target roof terminal corresponding to the roof terminal to be replaced; Each time maintenance time is reached, a replacement operation is performed on the roof terminal to be replaced. The replacement operation includes separating the roof terminal to be replaced from the cable and connecting the target roof terminal to the cable. Determining the target roof terminal corresponding to the roof terminal to be replaced includes: For the same type of EMU, the target roof terminal is determined based on the location of the roof terminal on the EMU whose failure rate is higher than a preset threshold.

2. The cable assembly management method according to claim 1, characterized in that, The process of separating the roof terminal to be replaced from the cable includes: The outer skirt and each layer of heat shrink tubing of the roof terminal to be replaced are removed layer by layer to separate the roof terminal to be replaced from the cable.

3. The cable assembly management method according to claim 2, characterized in that, The process of connecting the target roof terminal to the cable includes: Inspect the insulation surface of the cable for damage; If not, heat shrink the target roof terminal and the cable.

4. The cable assembly management method according to claim 1, characterized in that, The process of heat-shrinking the target roof terminal and the cable includes: Determine the target cutting position of the cable, which is a predetermined distance downward from the insulation break of the cable; The target roof terminal is heat-shrinked with the cable at the target cut position.

5. The cable assembly management method according to claim 1, characterized in that, The maintenance time includes the first maintenance time corresponding to advanced maintenance or the second maintenance time corresponding to half of the life cycle.

6. The cable assembly management method according to any one of claims 1-5, characterized in that, After connecting the target roof terminal to the cable, the cable assembly management method further includes: Electrical testing is performed on the new cable assembly obtained by connecting the target roof terminal and the cable; Obtain the test results of the new cable assembly, the test results including pass or fail; The new cable assembly that passes the test is identified as the cable assembly to be installed on the vehicle.

7. The cable assembly management method according to claim 6, characterized in that, The electrical testing includes insulation withstand voltage testing and / or partial discharge testing; The process of obtaining the test results of the new cable assembly includes: Obtain the first test result corresponding to the insulation withstand voltage test and the second test result corresponding to the partial discharge test of the new cable assembly; both the first test result and the second test result include pass or fail; The new cable assembly whose first and second test results are both passed is identified as the cable assembly to be installed on the vehicle.

8. A cable assembly management system, characterized in that, include: The acquisition module is used to acquire historical operating information of each EMU and determine the failure rate of each roof terminal based on the historical operating information. The first determining module is used to determine the roof terminal with a failure rate higher than a preset threshold as a roof terminal to be replaced. The second determining module is used to determine the target roof terminal corresponding to the roof terminal to be replaced. The replacement module is used to perform a replacement operation on the roof terminal to be replaced every time the maintenance time is reached. The replacement operation includes separating the roof terminal to be replaced from the cable and connecting the target roof terminal to the cable. Determining the target roof terminal corresponding to the roof terminal to be replaced includes: For the same type of EMU, the target roof terminal is determined based on the location of the roof terminal on the EMU whose failure rate is higher than a preset threshold.

9. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor, configured to implement the steps of the cable assembly management method as described in any one of claims 1-7 when executing the computer program.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the cable assembly management method as described in any one of claims 1-7.

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