A design method for electrical performance transfer cable network

Abstract

The present invention relates to a design method for an electrical performance transfer cable network, which solves the problem that there is no quick and reliable method for designing a transfer cable network. The following steps are included: Step 1, sorting out the conduction relationship of the tested cable; Step 2, selecting the tested core wire points, which should cover all the core wire points in all the paths in the tested cable; Step 3, reasonably selecting the electrical connectors, components and wires of the transfer cable network according to the composition of the tested cable; Step 4, designing the transfer cable network pattern; Step 5, proposing the electrical performance parameters of the transfer cable network, including conductivity, insulation performance, voltage resistance performance, etc.; Step 6, completing other necessary design requirements. The present invention can quickly and reliably complete the design process of the transfer cable network, and provides a useful reference for similar products to perform electrical performance testing.

Description

Technical Field

[0001] The invention relates to a design method of a cable network, in particular to a design method of an electrical performance transfer cable network. Background Art

[0002] During the assembly process of electromechanical products such as electrical equipment and vehicles, after the cable assemblies in the products are laid and fixed, it is usually necessary to test the conductivity, insulation, and voltage resistance of the installed cable assemblies in order to determine that the electrical performance of the cable assemblies meets the specified performance indicators and there are no faults such as short circuits, open circuits, or insulation layer damage. The testing equipment is generally a universal cable tester, an electrical performance testing adapter cable network, etc.

[0003] The electrical performance testing adapter cable network (hereinafter referred to as the adapter cable network) refers to a set of reusable tooling cables used to connect between the tested cable and the cable tester to perform conductivity, insulation, and withstand voltage tests on the tested cable. The connection diagram of the adapter cable network during the cable testing process is as follows: Figure 1 As shown. Since the conduction relationship of the tested cables and the cable connector models of different models of products vary greatly, it is necessary to design different transfer cable networks for different tested cables so that the tested cables can be connected to the output interface on the universal cable tester to achieve cable testing. At present, there is no mature method to quickly and reliably complete the design of the transfer cable network. Summary of the invention

[0004] The invention solves the problem that there is no quick and reliable method for designing an electrical performance transfer cable network by providing a design method for the electrical performance transfer cable network.

[0005] The present invention is achieved by the following technical solutions:

[0006] A design method for an electrical performance transfer cable network comprises the following steps:

[0007] Step 1: Sort out the conductivity relationship of the tested cable;

[0008] Step 2: Select the core points to be tested, which should cover all the core points in all paths of the tested cable;

[0009] Step 3: Reasonably select the electrical connectors, components and wires of the transfer cable network according to the composition of the cable under test;

[0010] Step 4: Design the transfer cable network pattern;

[0011] Step 5: Propose the electrical performance parameters of the transfer cable network, including conductivity, insulation performance, voltage resistance performance, etc.;

[0012] Step 6: Complete other necessary design requirements.

[0013] In step 1, according to the drawing of the tested cable, all the conductive paths of the tested cable are listed one by one by enumeration method, and listed in detail and organized into a conductive path table.

[0014] In step 2, all core points with path relationships in the tested cable are selected as the tested core points. When some core points in the tested cable are connected in series with couplers and other components that are not suitable for conduction, insulation or voltage resistance detection, these core points should be excluded from the transfer cable, that is, electrical performance testing is not performed on these special points. The core conduction relationship in the transfer cable network is determined based on the selected tested core points.

[0015] In step 3, the selection principle of the electrical connector is: when selecting the electrical connector, select the corresponding docking electrical connector from the same manufacturer according to the model of the electrical connector of the cable under test; the selection principle of the wire is: 1) when selecting the wire, if the cable under test is a high-voltage electrical system cable, the cross-sectional area of ​​the selected wire is generally not less than 0.35mm 2 ; 2) For low-voltage electrical system cables, the cross-sectional area of ​​the selected conductor is generally not less than 0.15mm 2 ;

[0016] 3) For special pins and sockets such as bus type, or other items not subject to the above requirements, the same wire model as the cable under test can be selected.

[0017] In step 4, the dimension design principle is: the design of the cable branch length should take into account the external dimensions of the product under test and the position of the cable under test after laying, meet the length requirements required for actual testing, ensure that when the cable tester is placed at the head or tail of the product, the adapter cable has sufficient length and leaves a moderate margin.

[0018] In step 5, the electrical performance indicators of the conductive, insulating and anti-electric cable network shall not be lower than the electrical performance indicators of the tested cable. The specific requirements are: 1) All core points shall be checked for conductivity; 2) Under normal atmospheric pressure conditions, the insulation resistance of each current-carrying line of the transfer cable network to the electrical connector housing, as well as the insulation resistance between each independent line, shall not be less than the index requirements of the tested cable; 3) Under normal atmospheric pressure conditions, the dielectric strength of each current-carrying line of the transfer cable network to the electrical connector housing, as well as the dielectric strength between each independent line, shall not be lower than the index requirements of the tested cable, and no breakdown shall occur during the test.

[0019] In step 6, when designing the transfer cable network, the calibration cycle requirements and calibration technical indicators of the transfer cable network should be given in the technical requirements of the design drawings. Generally, before each batch of inspections, the transfer cable network should be calibrated before use, and the calibration technical indicators should not be lower than the manufacturing acceptance indicators of the tested cables.

[0020] The present invention can quickly and reliably complete the design process of the switching cable network, and provides a useful reference for the electrical performance testing of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a connection diagram of the electrical performance test adapter cable network during the cable test process;

[0022] Figure 2 The present invention is a flow chart of the design of an electrical performance detection switching cable network. DETAILED DESCRIPTION

[0023] like Figure 2 As shown, the present invention provides a method for designing a switching cable network, which can quickly and reliably complete the design process of the switching cable network. The design is based on:

[0024] a. Cable pattern under test;

[0025] b. Technical requirements and qualification indicators of the test.

[0026] The designed transfer cable network should complete the following tasks:

[0027] a. Realize the switching function between the universal cable tester and the cable under test;

[0028] b. Realize the functions of conducting, insulating and withstanding voltage of the tested cable;

[0029] c. The detection range covers all core points of the cable under test (unless otherwise specified).

[0030] First, sort out the conductivity relationship of the cable under test and compile a conductivity relationship table; according to the conductivity relationship table, determine the path relationship of the transfer cable network on the drawing of the transfer cable network; sort out the connector models, component models and wire models of the cable under test, and compile a component list; determine the component models of the transfer cable network according to the component list of the cable under test; complete the design of the transfer cable network pattern; determine the electrical performance parameters of the transfer cable network; improve other design requirements; and review the design drawings.

[0031] The specific steps of this method are:

[0032] 1. Sort out the conductivity relationship of the cable under test

[0033] According to the drawing of the tested cable, all the conductive paths of the tested cable are listed one by one by enumeration method, and listed in detail and organized into a conductive path table.

[0034] 2. Select the core points to be tested (all core points in all paths of the tested cable should be covered);

[0035] All core points with path relationships in the tested cable are selected as the tested core points. When some core points in the tested cable are connected in series with couplers and other components that are not suitable for conduction, insulation or voltage resistance testing, these core points should be excluded from the transfer cable (that is, electrical performance testing of these special points should not be performed). Based on the selected core points to be tested, the core conduction relationship in the transfer cable network is determined.

[0036] 3. Reasonably select the electrical connectors, components and wires of the transfer cable network according to the composition of the cable under test;

[0037] (1) Principles for selecting electrical connectors

[0038] When selecting electrical connectors, choose the corresponding docking electrical connector from the same manufacturer based on the model of the electrical connector of the cable being tested.

[0039] (2) Principles for selecting conductors

[0040] 1) When selecting the conductor, if the tested cable is a high voltage electrical system cable, the cross-sectional area of ​​the selected conductor is generally not less than 0.35mm 2 .

[0041] 2) If the tested cable is a low voltage electrical system cable, the cross-sectional area of ​​the selected conductor is generally not less than 0.15mm 2 .

[0042] 3) For special pins and sockets such as bus type, or other items not subject to the above requirements, the same wire model as the cable under test can be selected.

[0043] 4. Design of transfer cable network pattern;

[0044] Size design principles

[0045] The design of the cable branch length should take into account the dimensions of the product being tested and the position of the cable being tested after laying, meet the length requirements required for actual testing, and ensure that when the cable tester is placed at the head or tail of the product, the adapter cable has sufficient length and leaves an appropriate margin.

[0046] 5. Propose the electrical performance parameters of the transfer cable network (conductivity, insulation performance, voltage resistance, etc.);

[0047] The electrical performance indicators of the conductive, insulating and anti-electrical cable network shall not be lower than the electrical performance indicators of the tested cable. Specific requirements:

[0048] (1) Line Correctness

[0049] All core points should be checked for continuity.

[0050] (2) Insulation resistance

[0051] Under normal atmospheric pressure conditions, the insulation resistance of each current-carrying line of the transfer cable network to the electrical connector housing, as well as the insulation resistance between each independent line, should not be less than the index requirements of the cable under test.

[0052] (3) Dielectric strength

[0053] Under normal atmospheric pressure conditions, the dielectric strength of each current-carrying line of the transfer cable network to the electrical connector housing, as well as the dielectric strength between each independent line, should not be lower than the index requirements of the cable under test, and no breakdown should occur during the test.

[0054] 6. Complete other design requirements;

[0055] When designing a transfer cable network, the verification cycle requirements and verification technical indicators of the transfer cable network should be given in the technical requirements of the design drawings. Generally, before each batch of testing, the transfer cable network is verified before use, and the verification technical indicators are not lower than the manufacturing acceptance indicators of the tested cables.

[0056] 7. Complete the review of design drawings.

[0057] The completed design drawings are reviewed and signed, including design, proofreading, review, approval, etc., to make the drawings effective and ready for production.

Claims

1. A design method for an electrical performance transfer cable network, characterized in that: The following steps are involved: Step 1: Sort out the conductivity relationship of the tested cable; Step 2: Select the core points to be tested, which should cover all the core points in all paths of the tested cable; Step 3: Reasonably select the electrical connectors, components and wires of the transfer cable network according to the composition of the cable under test; Step 4: Design the transfer cable network pattern; Step 5: Propose the electrical performance parameters of the transfer cable network, including conductivity, insulation performance, voltage resistance performance, etc.; Step 6: Complete other necessary design requirements.

2. The design method of an electrical performance transfer cable network according to claim 1 is characterized in that: In step 1, according to the drawing of the tested cable, all the conductive paths of the tested cable are listed one by one by enumeration method, and listed in detail and organized into a conductive path table.

3. The design method of an electrical performance transfer cable network according to claim 1 is characterized by: In step 2, all core points with path relationships in the tested cable are selected as the tested core points. When some core points in the tested cable are connected in series with couplers and other components that are not suitable for conduction, insulation or voltage resistance detection, these core points should be excluded from the transfer cable, that is, electrical performance testing is not performed on these special points. The core conduction relationship in the transfer cable network is determined based on the selected tested core points.

4. The design method of an electrical performance transfer cable network according to claim 1 is characterized by: In step 3, the principle of selecting the electrical connector is: when selecting the electrical connector, select the corresponding docking electrical connector from the same manufacturer according to the model of the electrical connector of the cable under test; The selection principle of the conductor is: 1) When selecting the conductor, if the cable to be tested is a high-voltage electrical system cable, the cross-sectional area of ​​the selected conductor is generally not less than 0.35mm 2 ; 2) If the tested cable is a low voltage electrical system cable, the selected conductor cross-sectional area is generally not less than 0.15mm 2 ; 3) For special pins and sockets such as bus types, or other items that are not subject to the above requirements, the same wire model as the cable being tested can be selected.

5. The design method of an electrical performance transfer cable network according to claim 1 is characterized by: Step 4 The size design principle is: the design of the cable branch length should take into account the size of the product under test and the position of the cable under test after laying, meet the length requirements required for actual testing, and ensure that when the cable tester is placed at the head or tail of the product, the adapter cable has sufficient length and leaves a moderate margin.

6. The design method of an electrical performance transfer cable network according to claim 1 is characterized by: In step 5, the electrical performance indicators of the conductive, insulating and anti-electrical cable network shall not be lower than the electrical performance indicators of the tested cable. Specific requirements are as follows: 1) All core points shall be checked for conductivity; 2) Under normal atmospheric pressure conditions, the insulation resistance of each current-carrying line of the transfer cable network to the electrical connector housing, as well as the insulation resistance between each independent line, shall not be less than the indicator requirements of the tested cable; 3) Under normal atmospheric pressure conditions, the dielectric strength of each current-carrying line of the transfer cable network to the electrical connector housing, as well as the dielectric strength between each independent line, should not be lower than the index requirements of the cable under test, and no breakdown should occur during the test.

7. The design method of an electrical performance transfer cable network according to claim 1 is characterized by: In step 6, when designing the transfer cable network, the calibration cycle requirements and calibration technical indicators of the transfer cable network should be given in the technical requirements of the design drawings. Generally, before each batch of inspections, the transfer cable network should be calibrated before use, and the calibration technical indicators should not be lower than the manufacturing acceptance indicators of the tested cables.

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