Detection device and detection method for wire harness

Abstract

The invention discloses a detection device and a detection method for a wire harness, and relates to the technical field of wire harness detection. The device comprises a detection guide piece, a plurality of independent inner conductors are prefabricated on the detection guide piece, each inner conductor comprises a vertical conductor rod and a transverse conductor rod, a test slot is formed in the top of each vertical conductor rod, and the side end of each transverse conductor rod protrudes out of the detection guide piece and is provided with a guide pipe. The guide pipe comprises a positioning pipe section and a limiting pipe section, a limiting ring is slidably matched with the periphery of the positioning pipe section, and a rotating sleeve is movably matched with the periphery of the limiting pipe section. The limiting ring and the rotating sleeve are matched through the magnetic attraction protrusions and the magnetic attraction grooves. A shrinking spiral conductive piece is movably arranged in a conical cavity of the shaping cylinder, the diameter of the shrinking spiral conductive piece is gradually reduced in the direction from the sealing end block to the guide pipe, and the two ends of the shrinking spiral conductive piece are in limiting fit with the transverse conductor rod and the sealing end block respectively. The device can reduce the damage of the wiring harness terminal, is suitable for wiring harnesses of various specifications, and improves the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness detection, and in particular to a wire harness detection device and a detection method. Background Art

[0002] In the field of EMU wiring harness testing, traditional testing methods have significant limitations. In existing technologies, EMU wiring harness testing often requires multiple tests using multiple devices to meet multi-mode testing requirements.

[0003] Existing testing methods are not only cumbersome and inefficient, but also require the wiring harness terminals to be frequently clamped under high pressure during testing, which can easily cause deformation. This deformation can seriously affect the quality of subsequent use, potentially leading to safety hazards such as poor contact and unstable signal transmission, and even adversely affecting the normal operation and safety performance of EMUs. Therefore, developing a new testing device and method that can simplify the testing process and reduce damage to EMU wiring harness terminals is of great practical significance. Summary of the Invention

[0004] In order to simplify the EMU wiring harness detection process and reduce damage to the EMU wiring harness terminals, the present invention provides a wiring harness detection device, including a detection guide. The detection guide is prefabricated with multiple independent inner conductors. The inner conductors include vertical conductor rods and horizontal conductor rods. A test slot is opened on the top of the vertical conductor rod.

[0005] A detection guide protrudes from the side end of the transverse conductor rod, and a guide tube is fixedly configured in the transverse conductor rod area where the detection guide protrudes. The guide tube includes a positioning tube section and a limiting tube section with a larger diameter than the positioning tube section. A limiting ring is slidably configured around the periphery of the positioning tube section, and a rotating sleeve is movably configured around the periphery of the limiting tube section.

[0006] The limiting ring includes a ring body and a plurality of magnetic protrusions located on a side of the ring body facing the rotating sleeve. The end surface of the rotating sleeve facing the limiting ring is provided with a plurality of magnetic grooves that cooperate with the magnetic protrusions.

[0007] The interior of the rotating sleeve is a sleeve cavity, in which a shaping cylinder is movably arranged and slides against the guide tube. A conical cavity is provided in the shaping cylinder. The rotating sleeve is fixedly provided with a sealing end block that slides against the shaping cylinder. The sealing end block is provided with a wire socket that passes through the conical cavity.

[0008] A shrinking spiral conductive part is movably arranged in the conical cavity of the forming cylinder. The diameter of the shrinking spiral conductive part gradually decreases along the sealing end block toward the guide tube. One end of the shrinking spiral conductive part is limitedly matched with the horizontal conductor rod, and the other end is limitedly matched with the sealing end block.

[0009] As a preferred technical solution of the device of the present invention: a fixed base is configured at the bottom of the detection guide, and the fixed base is configured with a snap-fit structure or a magnetic block structure.

[0010] As a preferred technical solution of the device of the present invention, the detection guide has threaded mounting grooves on both sides, and the transverse conductor rod extends through and protrudes from the threaded mounting grooves. The outer annular surface of the positioning tube segment is provided with a threaded portion that screws into the threaded mounting grooves. The interior of the guide tube is a conductor insertion cavity that extends through the positioning tube segment and the limiting tube segment, and the transverse conductor rod is inserted into the conductor insertion cavity. The side of the detection guide is provided with a stainless steel plate located outside the threaded mounting groove opening. The stainless steel plate has an annular groove, and a magnetic ring is disposed on the side of the ring body facing the stainless steel plate, which cooperates with the annular groove.

[0011] As a preferred technical solution of the device of the present invention, the outer ring surface of the positioning pipe section is provided with a guide groove, the inner periphery of the ring body is provided with an inner guide block which is slidably fitted in the position of the guide groove, and the outer ring surface of the ring body is provided with a circle of hand-pushing grooves.

[0012] As a preferred technical solution of the device of the present invention: the limiting pipe section is located in the sleeve cavity, and the side of the sleeve cavity facing the guide tube is a narrowed circular opening, and the diameter of the narrowed circular opening matches the positioning pipe section.

[0013] As a preferred technical solution of the device of the present invention, a first smooth surface is provided on one end surface of the shaping cylinder, the first smooth surface abuts against the guide tube, and a second smooth surface is provided on the other end surface of the shaping cylinder, the second smooth surface abuts against the sealing end block.

[0014] As a preferred technical solution of the device of the present invention: a square groove is opened at the side end of the horizontal conductor rod, and the shrinking spiral conductive member is fixedly connected to the side of the horizontal conductor rod to fix the square plate conductor, and the square plate conductor is clamped in the square groove.

[0015] As an optimal technical solution of the device of the present invention: a limiting square groove is provided on the side of the sealing end block facing the forming cylinder, and the shrinking spiral conductive part is fixedly connected to the limiting square frame on the side facing the sealing end block. The limiting square frame is clamped in the limiting square groove, and an inner frame opening is provided inside the limiting square frame, and the inner frame opening cooperates with the wire socket.

[0016] As a preferred technical solution of the device of the present invention: let the spiral axial width of the shrinking spiral conductive member be K, let the spiral radial thickness of the shrinking spiral conductive member be S, and K>2S.

[0017] The present invention also provides a wire harness detection method, comprising the following contents:

[0018] S1. Prepare and check that the detection device is normal.

[0019] S2. Separate the limiting ring from the rotating sleeve. At this time, the magnetic protrusion of the limiting ring and the magnetic groove of the rotating sleeve are disengaged.

[0020] S3. Insert the stripped wire harness core into the wire socket of the sealed end block, so that the wire harness core and the unstripped wire harness part enter the conical cavity of the forming cylinder and contact with the shrinking spiral conductive part.

[0021] S4. Rotate the rotating sleeve in the direction of the tightening mark on the rotating sleeve. As the rotating sleeve rotates, the real-time inner diameter of the shrinking spiral conductive part gradually decreases. After several turns, the area of the shrinking spiral conductive part close to the forming cylinder is in curved contact with the exposed battery cells of the wiring harness, and the area away from the forming cylinder is in curved contact with the unstripped wiring harness.

[0022] S 5. After the rotation is completed, fine-tune the rotating sleeve so that the contact state between the shrinking spiral conductive part and the wiring harness meets the detection requirements.

[0023] S6. Slide the limiting ring and insert the magnetic protrusion on the side of the limiting ring facing the rotating sleeve into the magnetic groove on the end face of the rotating sleeve facing the limiting ring to lock the position of the rotating sleeve.

[0024] S7. Complete the connection between all wiring harness cells that need to be tested and the testing device in the above manner.

[0025] S8. Insert the test probe of a multimeter or related testing equipment into the test slot at the top of the vertical conductor rod, perform various testing operations in sequence, obtain test data and complete the test.

[0026] Compared with the existing technology, the beneficial effects of the present invention are:

[0027] 1. The present invention achieves inner diameter contraction by tightening a shrinking spiral conductive member through a rotating sleeve. The area near the forming cylinder makes curved contact with the exposed cores of the wiring harness, while the area away from the forming cylinder makes curved contact with the unstripped wiring harness. This contact method avoids the rigid extrusion of the terminals by traditional high-pressure clamping, reduces the risk of wiring harness deformation, and ensures the quality of the wiring harness in subsequent use. Furthermore, the conical cavity design of the forming cylinder and the gradually varying diameter structure of the shrinking spiral conductive member can accommodate wiring harness cores of varying diameters. Adjustment of the rotating sleeve enables compatible testing of wiring harnesses of various specifications, enhancing the versatility and adaptability of the testing device, reducing the number of testing equipment types, and lowering usage costs.

[0028] 2. The device of the present invention is prefabricated with multiple independent inner conductors, which can connect multiple wiring harnesses and batteries at the same time. It can be used with a multimeter and other equipment to complete multiple tests at one time, changing the traditional cumbersome process of multiple equipment changes for testing, greatly shortening the testing time and significantly improving the testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the overall structure of the device of the present invention.

[0030] Figure 2It is a schematic diagram of the matching structure of the limiting ring, guide tube, rotating sleeve, shaping cylinder, shrinking spiral conductive member and sealing end block in the present invention.

[0031] Figure 3 This is a schematic diagram of the disassembly of the components of the limiting ring, guide tube, rotating sleeve, shaping cylinder, shrinking spiral conductive member, and sealing end block in the present invention.

[0032] Figure 4 This is a structural schematic diagram of the transverse conductor rod protruding from the threaded mounting groove in the present invention.

[0033] Figure 5 This is a schematic diagram of the separation of the limiting ring and the guide tube components in the present invention.

[0034] Figure 6 Schematic diagram of the distribution of the magnetic protrusions on the side end face of the limiting ring in the present invention.

[0035] Figure 7 It is a structural schematic diagram of the rotating sleeve in the present invention.

[0036] Figure 8 Schematic diagram of the distribution of magnetic grooves on the side end surface of the rotating sleeve in the present invention.

[0037] Figure 9 This is a schematic diagram of the separation of the shaping cylinder, the shrinking spiral conductive piece, and the sealing end block in the present invention.

[0038] Figure 10 Schematic diagram of the structure of the wide spiral contracting spiral conductive member in the present invention.

[0039] Among them: 1- detection guide, 101- threaded mounting groove, 102- stainless steel plate, 103- annular groove; 2- fixed base; 3- inner conductor, 301- vertical conductor rod, 302- horizontal conductor rod, 303- test slot, 304- square groove; 4- limit ring, 401- ring body, 402- inner guide block, 403- hand-push groove, 404- magnetic ring, 405- magnetic protrusion; 5- guide tube, 501- positioning tube section, 5011- threaded part, 501 2-guide groove, 502-limiting pipe section, 503-conductor insertion cavity; 6-rotating sleeve, 601-sleeve cavity, 6011-narrowed circular mouth, 602-magnetic groove, 603-textured protrusion; 7-forming cylinder, 701-conical cavity, 702-first smooth surface, 703-second smooth surface; 8-contracting spiral conductive part, 801-square plate conductor, 802-limiting square frame, 8021-frame inner mouth; 9-sealing end block, 901-wire socket, 902-limiting square groove. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0041] Example 1: The wire harness detection device of the present invention is mainly composed of a detection guide 1, an inner conductor 3, a guide tube 5, a limit ring 4, a rotating sleeve 6, a shaping cylinder 7, a shrinking spiral conductive member 8, a sealing end block 9 and other components. The various components are precisely matched to achieve stable connection and detection of the wire harness. The specific structural design is as follows:

[0042] Detection guide 1: as the main body of the device, multiple independent inner conductors 3 are prefabricated inside, including vertically distributed vertical conductor rods 301 and horizontally extended horizontal conductor rods 302. A test slot 303 is opened on the top of the vertical conductor rod 301 (such as Figure 1 As shown), it is used to insert the test probe of the multimeter and other detection equipment to achieve the conductive detection connection. The side end of the horizontal conductor rod 302 protrudes from the side of the detection guide 1, and its protruding area is used to install the guide tube 5, forming the core interface of the wire harness detection (as shown). Figure 4 The independent inner conductor 3 design allows for simultaneous connection of multiple wiring harnesses, enabling simultaneous testing of multiple data sets, replacing the traditional cumbersome process of multiple devices performing separate tests and improving efficiency.

[0043] The guide tube 5 includes a positioning tube section 501 (smaller diameter) and a limiting tube section 502 (larger diameter). The interior of the guide tube 5 is a through conductor insertion cavity 503 for the horizontal conductor rod 302 to be inserted and fixed (such as Figure 2 、 5 The outer surface of the positioning pipe section 501 is provided with a threaded portion 5011, which is screwed to the threaded mounting groove 101 on the side of the detection guide 1 to achieve detachable fixation of the guide tube 5 (as shown). Figure 4 As shown). The outer periphery of the limiting pipe section 502 is covered with a rotating sleeve 6, and the inner side thereof slides against the shaping cylinder 7 to form a guide channel for the wiring harness to be inserted. The threaded connection facilitates the installation and replacement of the guide tube 5, and adapts to the detection requirements of wiring harnesses of different specifications.

[0044] The limiting ring 4 is sleeved on the periphery of the positioning pipe section 501 and can slide along the guide groove 5012 (the outer ring surface of the positioning pipe section 501 is provided with a guide groove 5012, and the inner guide block 402 of the inner periphery of the limiting ring 4 is embedded therein. Figure 5 The ring body 401 is provided with a plurality of magnetic protrusions 405 on the side facing the rotating sleeve 6, which cooperate with the magnetic grooves 602 on the end surface of the rotating sleeve 6 (as shown). Figure 6 、 8 As shown), the position of the rotating sleeve 6 is locked by magnetic attraction. The outer ring surface of the limiting ring 4 is provided with a hand-pushing groove 403, which is convenient for manually sliding the limiting ring 4 (as shown). Figure 5 shown).

[0045] The rotating sleeve 6 is sleeved on the outer periphery of the limiting pipe section 502, and the outer surface thereof is provided with a textured protrusion 603 (such as Figure 7 The interior of the rotating sleeve 6 is a sleeve cavity 601, and the side facing the guide tube 5 is a narrowed circular opening 6011, which matches the diameter of the positioning tube section 501 and limits the axial movement range of the shaping cylinder 7 (as shown). Figure 2 、 7 shown).

[0046] Before testing, slide the limiting ring 4 through the manual slot 403 to separate the magnetic protrusion 405 from the magnetic groove 602 (as shown in the figure). Figure 5 rotate the rotating sleeve 6 to adjust the contraction of the spiral conductive member 8 during testing, and after completion, the sliding limit ring 4 is locked in position to ensure structural stability during testing.

[0047] The shaping cylinder 7 is located in the sleeve cavity 601 and is in sliding contact with the guide tube 5. A conical cavity 701 is provided inside the shaping cylinder 7 (the diameter of the conical cavity 701 gradually decreases along the direction of the guide tube 5, as shown in FIG. Figure 2 、 9 As shown). The two end surfaces of the shaping cylinder 7 are the first smooth surface 702 (abutting against the guide tube 5) and the second smooth surface 703 (abutting against the sealing end block 9). The smooth surface reduces the resistance of the shaping cylinder 7 when it rotates (as shown). Figure 9 shown).

[0048] The shrinking spiral conductive member 8 is spiral-shaped, and its diameter gradually decreases along the sealing end block 9 toward the guide tube 5, and is adapted to the shape of the conical cavity 701 (such as Figure 2 、 10 One end of the contraction spiral conductive member 8 is clamped in the square groove 304 of the horizontal conductor rod 302 through the square plate conductor 801 (as shown). Figure 4 、 9 As shown), the other end is fixed in the limiting square groove 902 (as shown) of the sealing end block 9 through the limiting square frame 802. Figure 9 The spiral axial width K and radial thickness S of the shrinking spiral conductive member 8 satisfy K>2S, forming a "wide spiral" structure to ensure uniform shrinkage of the inner diameter during rotation and elastic reset capability (as shown). Figure 10 shown).

[0049] The sealing end block 9 is fixed to the inner side of the rotating sleeve 6, and a wire socket 901 is provided, which is connected to the conical cavity 701 (such as Figure 2 、 9 The limiting square groove 902 on the inner side of the sealing end block 9 cooperates with the limiting square frame 802 of the shrinking spiral conductive member 8 to limit its radial movement. At the same time, the inner opening 8021 of the frame is aligned with the wire socket 901 to ensure that the conductive member is accurately aligned when the wire harness is inserted.

[0050] Embodiment 2: The present invention designs a wire harness detection method, the specific contents of which are as follows:

[0051] Step 1, device preparation and unlocking: Check that there is no abnormality in the detection guide 1, fixed base 2 (the bottom of the fixed base 2 can be equipped with a snap or magnetic block structure to facilitate the detection guide 1 to be placed in the corresponding position). Slide the limiting ring 4 to separate the magnetic protrusion 405 from the magnetic groove 602 of the rotating sleeve 6 (as shown in the figure). Figure 5 As shown), release the lock of the rotating sleeve 6.

[0052] Step 2: Inserting the wire harness: Insert the stripped wire harness core from the wire socket 901 of the sealed end block 9, so that the exposed core and the unstripped part enter the conical cavity 701 respectively and contact the shrinking spiral conductive part 8.

[0053] Step 3: Rotation adjustment and contact optimization: Rotate the rotating sleeve 6 along the tightening direction (the texture protrusion 603 increases the friction force, such as Figure 2 、 7 As shown, the shaping cylinder 7 moves with the rotating sleeve 6, and the conical cavity 701 squeezes and contracts the spiral conductive member 8, reducing its inner diameter. After several rotations, the area of the contracted spiral conductive member 8 close to the shaping cylinder 7 conforms to the exposed battery cell surface, while the area away from the shaping cylinder conforms to the unstripped wire harness surface.

[0054] Step 4: Magnetic locking: Fine-tune the rotating sleeve 6. When the contact state meets the detection requirements, slide the limiting ring 4 so that the magnetic protrusion 405 is locked into the magnetic groove 602 of the rotating sleeve 6 (as shown in the figure). Figure 8 As shown), lock the position of the rotating sleeve 6 to prevent it from loosening during the detection process.

[0055] Step 5: Multiple harness connection and test execution: Repeat the above steps to complete all harness connections, insert the multimeter test probe vertically into the test slot 303 on the top of the vertical conductor rod 301 (such as Figure 1 As shown), the probe tip contacts the conductive material inside the vertical conductor rod 301, forming a conductive loop of "probe → vertical conductor rod 301 → horizontal conductor rod 302 → contracted spiral conductive member 8 → wiring harness core", and the detection data is obtained through a multimeter or other equipment.

[0056] Step 6, end of detection: After the detection is completed, the limit ring 4 is completely separated from the rotating sleeve 6, and the shrinking spiral conductive part 8 expands in the opposite direction to the initial state under the action of its own spiral elastic force (it may be completely expanded to a free state, or it may be restricted by the conical cavity 701 of the shaping cylinder 7 and expand until it fits with the inner surface of the conical cavity 701).

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A detection device for a wire harness, characterized in that: The detection guide (1) comprises a plurality of prefabricated independent inner conductors (3), the inner conductors (3) comprising a vertical conductor rod (301) and a horizontal conductor rod (302), and a test slot (303) is provided on the top of the vertical conductor rod (301); The side end of the transverse conductor rod (302) protrudes from the detection guide (1), and the transverse conductor rod (302) region protruding from the detection guide (1) is fastened with a guide tube (5); The guide tube (5) comprises a positioning tube section (501) and a limiting tube section (502) having a diameter larger than that of the positioning tube section (501); a limiting ring (4) is slidably disposed on the periphery of the positioning tube section (501); and a rotating sleeve (6) is movably disposed on the periphery of the limiting tube section (502); The limiting ring (4) comprises a ring body (401), a plurality of magnetic protrusions (405) located on a side of the ring body (401) facing the rotating sleeve (6), and a plurality of magnetic grooves (602) cooperating with the magnetic protrusions (405) are provided on the end surface of the rotating sleeve (6) facing the limiting ring (4); The interior of the rotating sleeve (6) is a sleeve cavity (601), a shaping cylinder (7) is movably arranged in the sleeve cavity (601) and is in sliding contact with the guide tube (5), a conical cavity (701) is provided in the shaping cylinder (7), a sealing end block (9) is fixedly installed on the rotating sleeve (6) and is in sliding contact with the shaping cylinder (7), and a wire socket (901) is provided in the sealing end block (9) and is in communication with the conical cavity (701); A contraction spiral conductive member (8) is movably arranged in the conical cavity (701) of the shaping cylinder (7), and the diameter of the contraction spiral conductive member (8) gradually decreases along the sealing end block (9) toward the guide tube (5). One end of the contraction spiral conductive member (8) is limitedly engaged with the transverse conductor rod (302), and the other end is limitedly engaged with the sealing end block (9).

2. The wire harness detection device according to claim 1, characterized in that: The bottom of the detection guide (1) is provided with a fixed base (2), and the fixed base (2) is provided with a snap-fit structure or a magnetic block structure.

3. The wire harness detection device according to claim 1, wherein: Threaded mounting grooves (101) are provided on both sides of the detection guide (1), and the transverse conductor rod (302) passes through and protrudes from the threaded mounting grooves (101); The outer annular surface of the positioning pipe section (501) is provided with a threaded portion (5011) threadedly engaged with the threaded mounting groove (101); The interior of the guide tube (5) is a conductor insertion cavity (503) that penetrates the positioning tube section (501) and the limiting tube section (502), and the transverse conductor rod (302) is inserted into the conductor insertion cavity (503); The side of the detection guide (1) is provided with a stainless steel plate (102) located outside the opening of the threaded mounting groove (101), the stainless steel plate (102) is provided with an annular groove (103), and the side of the ring body (401) facing the stainless steel plate (102) is provided with a magnetic ring (404) that matches the annular groove (103).

4. The wire harness detection device according to claim 1, characterized in that: The outer annular surface of the positioning tube section (501) is provided with a guide groove (5012), and the inner periphery of the ring body (401) is provided with an inner guide block (402) that is slidably fitted at the position of the guide groove (5012); The outer ring surface of the ring body (401) is provided with a circle of hand-moving grooves (403).

5. The wire harness detection device according to claim 1, characterized in that: The limiting pipe section (502) is located in the sleeve cavity (601), and the side of the sleeve cavity (601) facing the guide tube (5) is a narrowed circular opening (6011), and the diameter of the narrowed circular opening (6011) matches the positioning pipe section (501).

6. The wire harness detection device according to claim 1, characterized in that: A first smooth surface (702) is provided on one end surface of the shaping cylinder (7), and the first smooth surface (702) abuts against the guide tube (5); A second smooth surface (703) is provided on the other end face of the shaping cylinder (7), and the second smooth surface (703) abuts against the sealing end block (9).

7. The wire harness detection device according to claim 1, characterized in that: A square groove (304) is provided at the side end of the transverse conductor rod (302); the shrinking spiral conductive member (8) is fixedly connected to a square plate conductor (801) on one side facing the transverse conductor rod (302); and the square plate conductor (801) is clamped in the square groove (304).

8. The wire harness detection device according to claim 1, characterized in that: The sealing end block (9) is provided with a limiting square groove (902) on the side facing the shaping cylinder (7); the shrinking spiral conductive member (8) is fixedly connected to a limiting square frame (802) on the side facing the sealing end block (9); the limiting square frame (802) is clamped in the limiting square groove (902); an inner frame opening (8021) is provided inside the limiting square frame (802); and the inner frame opening (8021) cooperates with the wire socket (901).

9. The wire harness detection device according to claim 1, characterized in that: Assuming that the spiral axial width of the contraction spiral conductive element (8) is K, and the spiral radial thickness of the contraction spiral conductive element (8) is S, K>2S.

10. A wire harness detection method, characterized in that: A wire harness detection device according to any one of claims 1 to 9, comprising the following contents: S1. Prepare and check that the detection device is normal; S2. Separate the limiting ring (4) from the rotating sleeve (6), and the magnetic protrusion (405) of the limiting ring (4) and the magnetic groove (602) of the rotating sleeve (6) are in a disengaged state; S3. Insert the stripped wire harness core from the wire socket (901) of the sealed end block (9) so that the wire harness core and the unstripped wire harness portion enter the conical cavity (701) of the shaping cylinder (7) and contact the shrinking spiral conductive member (8); S4. Rotate the rotating sleeve (6) in the direction of the tightening mark of the rotating sleeve (6). As the rotating sleeve (6) rotates, the real-time inner diameter of the shrinking spiral conductive member (8) gradually decreases. After several turns, the shrinking spiral conductive member (8) is in contact with the exposed core of the wiring harness in the area close to the shaping cylinder (7), and in contact with the unskinned wiring harness in the area away from the shaping cylinder (7); S5. After the rotation is completed, fine-tune the rotary sleeve (6) so that the contact state of the contraction spiral conductive member (8) and the wiring harness meets the detection requirements; S6. Slide the limiting ring (4) and insert the magnetic protrusion (405) on the side of the limiting ring (4) facing the rotating sleeve (6) into the magnetic groove (602) on the end face of the rotating sleeve (6) facing the limiting ring (4) to lock the position of the rotating sleeve (6); S7. Complete the connection of all wiring harness cells that need to be tested with the detection device in accordance with the above method; S8. Insert the test probe of a multimeter or related testing equipment into the test slot (303) on the top of the vertical conductor rod (301), perform various testing operations in sequence, obtain test data and complete the test.

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