Electrical safety performance detection equipment and detection method for rail transit

Abstract

The invention discloses electrical safety performance detection equipment for rail transit and a detection method. The electrical safety performance detection equipment comprises a bracket, a vibration mechanism, a rotating mechanism, a clamping seat, a tension and compression test mechanism and a camera, the vibration mechanism is used for carrying out vibration simulation in the vertical direction, the horizontal transverse direction and the horizontal longitudinal direction; the rotating mechanism is used for rotating the connector clamped by the clamping seat; the tension and compression testing mechanism is used for performing tension and compression detection on the connector; the camera is used for shooting the connector; the operation table is in signal connection with a visual identification module and a tension and compression analysis module; the visual identification module is used for identifying and analyzing the condition of the connector; and the tension and compression analysis module is used for acquiring and analyzing the pressure conditions of the male head and the female head of the connector during connection and separation before detection and the pressure conditions of the male head and the female head during connection and separation after detection. According to the invention, electrical safety performance detection can be carried out on the rail transit connector in multiple modes, and good connection of the rail transit connector is ensured.

Description

Technical Field

[0001] This invention relates to the field of electrical safety performance testing technology for rail transit, specifically to a testing device and method for electrical safety performance testing of rail transit. Background Technology

[0002] The medium-voltage power supply network of rail transit vehicles supplies power to all medium and low-voltage auxiliary equipment on the train and is an important component of the train's electrical system. Therefore, the medium-voltage power supply network is required to have high stability and a low failure rate. Among these components, the rail transit connector is a device used to achieve current transmission between the rail transit vehicle and the power supply system. It plays a role in preventing electrical circuit breaks, jamming, and other safety hazards, ensuring the safe operation of the rail transit system. The rail transit connector consists of a signal transmission male connector and a signal reception female connector, which lock and seal the internal battery cell connection points through a snap-fit ​​mechanism.

[0003] Because rail transit vehicles experience various road conditions during operation, the electrical equipment of the rail transit will vibrate synchronously and its cables will be stretched. At this time, the rail transit connectors need to be tested for their circuit connection status in order to explore their electrical connection characteristics. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide an electrical safety performance testing device and method for rail transit, which can perform electrical safety performance testing on rail transit connectors in multiple modes, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An electrical safety performance testing device for rail transit includes a support frame, a vibration mechanism, a rotation mechanism, a clamping seat, a tensile / compression testing mechanism, and a camera. The vibration mechanism is located on top of the support frame and is used to simulate vibrations in the vertical, horizontal, and longitudinal directions. The rotation mechanism is located at the top center of the vibration mechanism, and the clamping seat is located at the top center of the rotation mechanism. The rotation mechanism is used to rotate a connector held by the clamping seat. The tensile / compression testing mechanism is located on the support frame and above one side of the vibration mechanism. The tensile / compression testing mechanism is used to perform tensile / compression tests on the connector. The camera is located on the vibration mechanism and to one side of the tensile / compression testing mechanism. The camera is used to photograph the connector. It also includes an operating console, which is signal-connected to a vision recognition module and a tension / compression analysis module; the camera is electrically connected to the vision recognition module, which is used to identify and analyze the condition of the connector; the tension / compression testing mechanism is electrically connected to the tension / compression analysis module, which is used to acquire and analyze the pressure conditions of the male and female connectors before connection and separation, and the pressure conditions after connection and separation.

[0007] Preferably, the vibration mechanism includes a vibration table, a vibration component one, and a vibration component two. The vibration table is mounted on a support, the vibration component one is mounted on the vibration table, and the vibration component two is mounted on the vibration component one. The vibration table is used for vertical vibration, the vibration component one is used for horizontal vibration, and the vibration component two is used for horizontal longitudinal vibration.

[0008] More preferably, the vibration table includes a movable part and a driving part. The movable part includes a platform, four sets of guide columns and four sets of springs. The platform is located on a support. The four sets of guide columns are fixed at the four corners of the bottom of the platform. The guide columns are slidably connected to the support. The springs are mounted on the guide columns. One end of the spring is fixedly connected to the support, and the other end of the spring is fixedly connected to a base. The base is fixed to the bottom of the guide column. The drive unit includes a motor, two sets of connecting plates, several rotating shafts, and several cams. The two sets of connecting plates are fixed on a bracket below the platform. The motor is fixed to one side of one of the connecting plates. Each rotating shaft is horizontally arranged and its two ends are connected to the connecting plate through bearings. The output end of the motor is fixedly connected to one of the rotating shafts. Each rotating shaft has a pulley and several cams fixed on it. All the pulleys on the rotating shafts are connected by belt drive. All the cams protrude in the same direction.

[0009] Preferably, the vibration assembly includes a movable part 2 and a driving part 2. The movable part 2 includes a slide and a sliding plate. The slide is fixed to the top of the platform. The upper surface of the slide is provided with a groove. The bottom surface of the sliding plate is provided with a protrusion and is disposed in the groove. The sliding plate is slidably connected to the slide. The second drive unit includes a drive base, a second motor, several second rotating shafts, several second cams, a stop plate, and several second springs. The drive base is fixed to the platform, the second motor is fixed to the top of the drive base, each second rotating shaft is vertically arranged and both ends are connected to the drive base through bearings, the output end of the second motor is fixedly connected to one of the second rotating shafts, each second rotating shaft has a pulley and a second cam fixed on it, all the pulleys on the second rotating shafts are connected by belt drive, and all the second cams have the same protrusion direction and their height corresponds to the height of the slide plate. The abutment is fixed to the platform, and the abutment and the drive seat are located on opposite sides of the slide. One end of each of the springs is fixed to the side of the slide away from the drive seat, and the other end of the springs is fixedly connected to the abutment.

[0010] Preferably, the second vibration component has the same structural principle as the first vibration component, and the setting direction of the second vibration component is perpendicular to the setting direction of the first vibration component.

[0011] Preferably, the rotating mechanism includes a support base one, a rotating table and a motor three. The support base one is fixed to the top of the vibration component two, the motor three is fixed to the top of the support base one, the rotating table is disposed on the top of the vibration component two and rotatably connected to the vibration component two, and the output end of the motor three is connected to the rotating table through gear transmission. The clamping seat is fixed to the top of the rotary table.

[0012] Preferably, the tensile and compressive testing mechanism includes a second support base, a cylinder, a lifting base, a tensile and compressive sensor, a clamp, and a pressure sensor. The second support base is fixed to a bracket, the cylinder is fixed to the top of the second support base, the lifting base is fixedly connected to the output end of the cylinder, and the lifting base is used to control the lifting of the internal lifting slider. One end of the tensile and compressive sensor is fixed to the lifting slider on the output end side of the lifting base, and the clamp is fixed to the other end of the tensile and compressive sensor. The clamp includes a driving part and two sets of clamping parts. The two sets of clamping parts are drivenly connected to the output end of the driving part. The driving part is used to drive the two sets of clamping parts to move in opposite directions and in opposite directions to clamp and release the connector to be tested. The two sets of clamping parts are respectively provided with grooves on the side close to each other, and a pressure sensor is provided in each groove. Anti-slip pads are respectively provided on the side close to each of the two pressure sensors, and the anti-slip pads are connected to the corresponding clamping parts. The tensile and compressive sensor and the pressure sensor are electrically connected to the tensile and compressive analysis module.

[0013] Preferably, the camera is fixed to the top of the drive seat of the vibration assembly one and close to the support seat two of the tension and compression testing mechanism.

[0014] A method for testing the electrical safety performance of rail transit systems includes the following steps: Step 1: Install and fix the male and female connectors of the connector to be tested onto the clamping base and fixture respectively; Step 2: The camera takes a picture of the connector on the clamp, and the visual recognition module visually detects the connector until the visual recognition module determines that it is normal; Step 3: Control the tensile and compressive testing mechanism to move closer to the clamping seat to complete the connection between the male and female connectors until the tensile and compressive analysis module determines that the overall pressure when the male and female connectors are connected is normal; Step 4: Perform safety performance testing on the connector under at least one of the following modes: vibration mode, rotation mode, tension / compression mode; Step 5: After the safety performance test is completed, the connector located on the clamping seat is visually inspected again.

[0015] Preferably, the specific process of step three is as follows: the lifting seat drives its lifting slider to adjust the height of the tension and compression sensor and the clamp, so that the height of the tension and compression sensor and the clamp is consistent with the height of the connector to be tested held by the clamping seat. Then the cylinder starts to extend, so that the male end of the connector is connected to the female end. At this time, the tension and compression analysis module obtains the maximum pressure data f1 when the male end is half connected to the female end and the maximum pressure data f2 when the connection is completed. The tension and compression analysis module has an optimal tension and compression data range set inside when the male and female connectors are connected. The optimal tension and compression data range is denoted as (F1, F2). F1 is the minimum tension force that will not cause loosening when the male and female connectors are connected, and F2 is the maximum tension force that will not cause jamming when the male and female connectors are connected. When f1∈(F1,F2) and f2∈(F1,F2), the overall pressure when the male and female connectors are connected is normal. In other cases, the abnormality is due to abnormal overall pressure when the male and female connectors are connected.

[0016] Compared with the prior art, the advantages and positive effects of this invention are: This invention, by incorporating a vibration mechanism, a rotation mechanism, a tension / compression testing mechanism, a camera, a visual recognition module, and a tension / compression analysis module, can perform safety performance testing on connectors under inspection in multiple modes. This ensures that connectors in rail transit can meet normal operating conditions and will not experience electrical circuit breaks due to loosening or affect normal connection and separation due to jamming. This improves the stability of the power supply network in rail transit. Furthermore, it can detect abnormal connection conditions of connectors, ensuring that connectors can still meet operating conditions even under abnormal connection conditions. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the detection device of the present invention; Figure 2 This is a partial structural schematic diagram of the detection device of the present invention; Figure 3 This is a partial structural cross-sectional schematic diagram of the detection device of the present invention; Figure 4 yes Figure 3Enlarged structural diagram of region A in the middle; Figure 5 This is a rear cross-sectional view of part of the structure of the detection device of the present invention; Figure 6 yes Figure 3 A magnified structural diagram of region B in the middle.

[0018] In the diagram: 1. Bracket; 2. Vibration mechanism; 21. Vibration table; 211. Table plate; 212. Guide column; 213. Spring 1; 214. Motor 1; 215. Connecting plate; 216. Rotating shaft 1; 217. Cam 1; 22. Vibration assembly 1; 221. Slide; 222. Slide plate; 223. Drive seat; 224. Motor 2; 225. Rotating shaft 2; 226. Cam 2; 227. Support plate; 228. Spring 2; 23. Vibration assembly 2; 3. Rotating mechanism; 31. Support base one; 32. Rotary table; 33. Motor three; 4. Clamping seat; 5. Tension / compression testing mechanism; 51. Support base II; 52. Cylinder; 53. Lifting base; 54. Tension / compression sensor; 55. Fixture; 551. Drive unit; 552. Clamping unit; 56. Pressure sensor; 6. Camera; 7. Control panel. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Please see Figures 1-6 This invention provides an electrical safety performance testing device for rail transit, including a support 1, a vibration mechanism 2, a rotation mechanism 3, a clamping seat 4, a tensile and compressive testing mechanism 5, and a camera 6. The vibration mechanism 2 is located on the top of the support 1, the rotation mechanism 3 is located at the top center of the vibration mechanism 2, the clamping seat 4 is located at the top center of the rotation mechanism 3, the tensile and compressive testing mechanism 5 is located on the support 1 and above one side of the vibration mechanism 2, and the camera 6 is located on the vibration mechanism 2 and to one side of the tensile and compressive testing mechanism 5. The support 1 supports the entire testing device, the vibration mechanism 2 simulates vertical, horizontal, and longitudinal vibrations, the rotation mechanism 3 rotates the connector held by the clamping seat 4, the tensile and compressive testing mechanism 5 performs tensile and compressive testing on the connector held by the clamping seat 4, and the camera 6 captures images of the connector.

[0023] It should be noted that connectors include male and female connectors. The male connector is the insertion end of the connector, which transmits signals, while the female connector is the receiving end of the connector, which receives signals.

[0024] Specifically, such as Figure 1 As shown, a connecting frame is fixedly connected to one side of the bracket 1, and an operating table 7 is fixedly connected to the side of the connecting frame away from the vibration mechanism 2. The operating table 7 is connected to a vision recognition module and a tension and compression analysis module. The vision recognition module is used to identify and analyze the condition of the connector, and the tension and compression analysis module is used to acquire and analyze the pressure conditions of the male and female connectors before connection and separation, and the pressure conditions after connection and separation.

[0025] Specifically, such as Figures 2-5 As shown, the vibration mechanism 2 includes a vibration table 21, a vibration component 1 22, and a vibration component 23. The vibration table 21 is mounted on the support 1, the vibration component 1 22 is mounted on the vibration table 21, and the vibration component 23 is mounted on the vibration component 1 22. The vibration table 21 is used for vertical vibration, the vibration component 1 22 is used for horizontal (perpendicular to the operating table 7) vibration, and the vibration component 23 is used for horizontal (parallel to the operating table 7) vibration.

[0026] Furthermore, such as Figure 2As shown, the vibration table 21 includes a movable part 1 and a driving part 1. The movable part 1 includes a table plate 211, four sets of guide columns 212 and four sets of springs 213. The table plate 211 is located above the support 1. The four sets of guide columns 212 are fixed to the four corners of the bottom of the table plate 211. The guide columns 212 are slidably connected to the support 1. The springs 213 are sleeved on the guide columns 212. One end of the springs 213 is fixedly connected to the support 1, and the other end of the springs 213 is fixedly connected to a base. The base is fixed to the bottom of the guide column 212. The drive unit includes a motor 214, two sets of connecting plates 215, several rotating shafts 216, and several cams 217. The two sets of connecting plates 215 are fixed on the bracket 1 below the platform 211 and are parallel to the operating table 7. The motor 214 is fixed on the connecting plate 215 near the side of the operating table 7. Each rotating shaft 216 is horizontally arranged and both ends are connected to the connecting plate 215 through bearings. The output end of the motor 214 is fixedly connected to one of the rotating shafts 216. Each rotating shaft 216 has a pulley and several cams 217 fixed on it. All the pulleys on the rotating shafts 216 are connected by belt drive. All the cams 217 protrude in the same direction.

[0027] In actual operation, motor 214 starts rotating forward, driving the connected shaft 216 to rotate forward. Through pulleys and belts, this drives the remaining shafts 216 to rotate forward, thereby driving all cams 217 to rotate forward. When the protruding part of cam 217 gradually contacts the bottom of the platform 211, it lifts the platform 211 and compresses spring 213. When the protruding part of cam 217 gradually separates from the platform 211, it lowers the platform 211, and spring 213 returns to its original position. Under the elastic force of spring 213, the platform 211 descends synchronously, thus enabling the drive unit to drive the moving part to lift and lower vertically, achieving vertical vibration.

[0028] Furthermore, such as Figures 2-5 As shown, the vibration assembly 22 includes a movable part 2 and a driving part 2. The movable part 2 includes a slide 221 and a slide plate 222. The slide 221 is fixed to the top of the platform 211. A groove is provided on the upper surface of the slide 221. A protrusion is provided on the bottom surface of the slide plate 222 and is disposed in the groove. The slide plate 222 is slidably connected to the slide 221. The second drive unit includes a drive base 223, a second motor 224, several second rotating shafts 225, several second cams 226, a stop plate 227, and several second springs 228. The drive base 223 is fixed on the platform 211 near the side of the operating table 7. The second motor 224 is fixed on the top of the drive base 223. Each second rotating shaft 225 is vertically arranged and both ends are connected to the drive base 223 through bearings. The output end of the second motor 224 is fixedly connected to one of the second rotating shafts 225. Each second rotating shaft 225 has a pulley and a second cam 226 fixed on it. All the pulleys on the second rotating shafts 225 are connected by belt drive. All the second cams 226 protrude in the same direction and are set at a height corresponding to the height of the slide plate 222. The abutment 227 is fixed on the platform 211 on the side away from the operating table 7. The abutment 227 and the drive seat 223 are located on opposite sides of the slide plate 222. One end of several springs 228 is fixed to the side of the slide plate 222 on the side away from the drive seat 223, and the other end of the springs 228 is fixedly connected to the abutment 227.

[0029] In actual operation, motor 224 starts rotating forward, driving shaft 225 connected to it to rotate forward. Then, through pulleys and belts, it drives the other shafts 225 to rotate forward, thereby driving all cams 226 to rotate forward. When the protruding part of cam 226 gradually contacts the side of slide plate 222, it can push slide plate 222 away from the operating table 7, while compressing spring 228. When the protruding part of cam 226 gradually separates from slide plate 222, under the elastic force of spring 228, it can push slide plate 222 to move closer to the operating table 7, thereby enabling drive unit 2 to drive movable unit 2 to move perpendicular to the operating table 7, achieving horizontal lateral vibration.

[0030] Specifically, such as Figures 2-5 As shown, the vibration component 23 has the same structural principle as the vibration component 22. However, the setting direction of the vibration component 23 is perpendicular to the setting direction of the vibration component 22. The vibration component 23 is used to perform vibration in a direction parallel to the operating table 7 to achieve horizontal longitudinal vibration.

[0031] Specifically, such as Figure 3 and Figure 4 As shown, the rotating mechanism 3 includes a support base 31, a rotating platform 32, and a motor 33. The support base 31 is fixed to the slide plate on top of the vibration component 23. The motor 33 is fixed to the top of the support base 31. The rotating platform 32 is disposed on the slide plate on top of the vibration component 23 and is rotatably connected to the slide plate of the vibration component 23. The output end of the motor 33 is connected to the rotating platform 32 via gear transmission. The output end of the motor 33 is fixedly connected to gear 1, which meshes with gear 2 at the bottom of the rotating platform 32.

[0032] The clamping seat 4 is fixed to the top of the rotary table 32. The clamping seat 4 uses a motor combined with a bidirectional lead screw drive to clamp the connector to be tested.

[0033] In actual operation, motor 33 starts and drives the rotary table 32 to rotate through gear transmission, thereby driving the clamping seat 4 above the rotary table 32 to rotate.

[0034] Specifically, such as Figure 2 and Figure 6 As shown, the tension / compression testing mechanism 5 includes a second support base 51, a cylinder 52, a lifting base 53, a tension / compression sensor 54, and a clamp 55. The second support base 51 is fixed to the bracket 1 and is inverted U-shaped. The cylinder 52 is fixed to the top of the second support base 51. The lifting base 53 is fixedly connected to the output end of the cylinder 52 and is used to control the lifting of the internal lifting slider. One end of the tension / compression sensor 54 is fixed to the lifting slider on the output end side of the lifting base 53. The clamp 55 is fixed to the other end of the tension / compression sensor 54. At one end, the clamp 55 includes a drive unit 551 and two sets of clamping parts 552. The two sets of clamping parts 552 are connected to the output end of the drive unit 551. The drive unit 551 is used to drive the two sets of clamping parts 552 to move towards each other and away from each other to clamp and release the connector to be tested. The two sets of clamping parts 552 are respectively provided with grooves on the side close to each other. Each groove is provided with a pressure sensor 56. The two pressure sensors 56 are respectively provided with anti-slip pads on the side close to each other. The anti-slip pads are connected to the corresponding clamping parts 552. The tension / compression sensor 54 and the pressure sensor 56 are electrically connected to the tension / compression analysis module. The lifting seat 53 uses a motor and a lead screw drive to lift the slider. The drive unit 551 uses a motor and a bidirectional lead screw drive to drive the clamping unit 552 to clamp and release the connector to be tested.

[0035] In actual operation, the clamp 55 holds the contactor to be tested, and the lifting seat 53 drives its lifting slider to move up and down, thereby adjusting the height of the tension sensor 54 and the clamp 55 so that the tension sensor 54 and the clamp 55 are at the same height as the connector to be tested held by the clamping seat 4; when the cylinder 52 extends, it can simulate the connection of the connector, and when the cylinder 52 retracts, it can simulate the separation of the connector.

[0036] Specifically, such as Figure 2 As shown, the camera 6 is fixed to the top of the drive base 223 and close to the side of the support base 51. The camera 6 is electrically connected to the visual recognition module.

[0037] The method for testing the electrical safety performance of rail transit using the aforementioned safety performance testing equipment includes the following steps: Step 1: Install and fix the male and female connectors of the connector to be tested onto the clamping base 4 and the clamp 55 respectively.

[0038] Specifically, in order to conform to actual usage habits, the female head of the connector is fixed on the clamp 4, and the male head of the connector is fixed on the fixture 55. Then, the subsequent performance test is carried out. This is a performance test under normal conditions, which is applicable to situations where the electrical equipment in rail transit is fixed, but the male head of the connector connected to it is relatively movable or its position is not restricted. It can also be used for other similar situations.

[0039] If the female connector is fixed on the clamp 55 and the male connector is fixed on the holder 4, and then subsequent performance testing is performed, it is a performance test under abnormal conditions. The testing method is the same as the testing method under normal conditions, except that the positions of the female and male connectors are interchanged. The performance test under abnormal conditions is applicable to situations where electrical equipment on rail transit is active, but the male connector of the connected device is relatively fixed or its position is restricted, and it can also be used for other similar situations.

[0040] When installing the male connector of the fixed connector on the clamp 55, the pressure value detected by the pressure sensor 56 needs to be kept within a certain range. The specific range is set manually to ensure that the clamping force during subsequent separation is the same as the force during connection.

[0041] Step 2: Camera 6 takes a picture of the connector on the clamp 4, and the visual recognition module visually detects the connector until the visual recognition module determines that it is normal.

[0042] Specifically, in the initial state, the clamping base 4 is set perpendicular to the operating table 7. After the clamping base 4 clamps and fixes the female head of the connector, the rotating mechanism 3 starts to rotate, driving the clamping base 4 and the female head on the clamping base 4 to rotate, so that the side of the female head connected to the male head faces the camera 6. The visual recognition module acquires the image captured by the camera 6. The visual recognition module has a standard graphic of the connection surface of the male and female connectors. When the actual female head connection surface does not match the standard graphic, the visual recognition module judges it as abnormal, issues an alarm, and performs rejection. When the actual female head connection surface matches the standard graphic, the visual recognition module judges it as normal and can perform subsequent safety performance testing.

[0043] Step 3: Control the tensile and compressive testing mechanism 5 to move closer to the clamping seat 4 to complete the connection between the male and female connectors until the tensile and compressive analysis module determines that the overall pressure when the male and female connectors are connected is normal.

[0044] Specifically, the lifting seat 53 drives its lifting slider to adjust the height of the tension and pressure sensor 54 and the clamp 55, so that the tension and pressure sensor 54 and the clamp 55 are at the same height as the female head of the connector to be tested held by the clamping seat 4. Then, the cylinder 52 starts to extend, so that the male head with the connector to be tested on the clamp 55 connects with the female head. At this time, the tension and pressure analysis module obtains the maximum pressure data when the male head and the female head are half connected and the maximum pressure data when the connection is completed. The maximum pressure data when the connection is half connected is recorded as f1, and the maximum pressure data when the connection is completed is recorded as f2.

[0045] The tension and compression analysis module has an optimal tension and compression data range set inside when the male and female connectors are connected. The optimal tension and compression data range is denoted as (F1, F2). F1 is the minimum tension force that will not cause loosening when the male and female connectors are connected, and F2 is the maximum tension force that will not cause jamming when the male and female connectors are connected.

[0046] When f1∈(F1,F2) and f2∈(F1,F2), the overall pressure when the male and female connectors are connected is normal, and subsequent safety performance testing can be performed.

[0047] In other cases, the overall pressure during the connection of the male and female connectors is abnormal. Cylinder 52 contracts, causing the male and female connectors on clamp 55 to separate. This step is repeated. If the result remains unchanged, the tension and compression analysis module will issue an alarm, and subsequent safety performance testing cannot be performed.

[0048] Specifically, when f1=f2, the resistance is greater in the first half of the connection; when f1≠f2, the resistance is greater in the second half of the connection.

[0049] When f1=f2, if f1≤F1 and f2≤F1, the resistance is high in the first half of the connection between the male and female connectors, but low in the overall connection. In actual use in rail transit, this can easily lead to electrical circuit breakage due to loosening. If f1≥F2 and f2≥F2, the resistance is high in the first half of the connection between the male and female connectors, and high in the overall connection. In actual use in rail transit, this can easily lead to jamming due to excessive tightness. When f1≠f2, if {f1, f2} max If {f1, f2} ≤ F1 (i.e., the maximum value of f1 and f2 is less than or equal to F1), the resistance is high in the latter half of the connection between the male and female connectors, but low in the overall connection. In actual use in rail transit, this can easily lead to electrical circuit breaks due to loosening; if {f1, f2} max ≥F2 indicates high resistance in the latter half of the connector when the male and female heads are connected, as well as high resistance in the overall connection. In actual use in rail transit, this can easily lead to jamming due to excessive tightness, affecting normal connection.

[0050] Step 4: Perform safety performance testing on the connector under at least one of the following modes: vibration mode, rotation mode, tension / compression mode; Specifically, vibration modes: Method 1: Motor 214 starts rotating forward, driving each shaft 216 and the cam 217 on the shaft 216 to rotate, causing vertical vibration.

[0051] Method 2: Motor 224 starts rotating forward, driving each shaft 225 and the cam 226 on the shaft 225 to rotate forward, performing horizontal lateral vibration perpendicular to the operating table 7.

[0052] Method 3: Vibration component 23 is activated to perform horizontal longitudinal vibration parallel to the operating table 7.

[0053] The above three vibration modes can be performed in pairs or all three simultaneously. This mode can be adjusted by changing the speed of the motors in motor 214, motor 224 in vibration assembly 22, and motor 23 in vibration assembly 23.

[0054] Rotation mode: Method 1: Motor 33 starts rotating in one direction, driving the rotary table 32 and the clamping seat 4 above the rotary table 32 to rotate and perform a complete circular motion. This method is suitable for male connectors that are not connected with wires.

[0055] Method 2: Motor 33 starts and rotates in both directions, driving the rotary table 32 and the clamping seat 4 above the rotary table 32 to rotate in both directions at small angles, achieving a small-angle swinging effect, which is suitable for situations where the male connector has a long connecting wire; in this mode, different rotation frequencies can be adjusted by adjusting the speed of motor 33.

[0056] Pull-compression mode: After the male and female connectors are connected, cylinder 52 retracts, causing the male and female connectors on clamp 55 to separate. Then, cylinder 52 repeatedly extends and retracts a certain number of times to perform repeated insertion and removal. The specific number of times is set manually. However, when cylinder 52 repeatedly extends and retracts, the extension length is greater than the extension length in step three. At this time, tension and pressure sensor 54 no longer repeatedly acquires tension and pressure data. This can detect the connection status after the male and female connectors are connected due to abnormal impact or abnormal insertion and removal. In this detection mode, different tension and pressure frequencies can be adjusted by adjusting the speed of cylinder 52's repeated extension and retraction, and the output force or air pressure of cylinder 52 can be adjusted to adjust different tension and pressure levels.

[0057] The above detection methods can be performed in pairs or in three modes simultaneously, thus enabling multiple combined modes. Combined mode 1: vibration mode combined with rotation mode; Combined mode 2: vibration mode combined with tension and compression mode; Combined mode 3: rotation mode combined with tension and compression mode; Combined mode 4: vibration mode and rotation mode combined with tension and compression mode.

[0058] It should be noted that the combined mode 1 can be used to simply adjust the rotation angle, thereby determining the impact of vibrations in different directions on the connector's connection.

[0059] Performance Testing: After performing the above coupling modes, the male and female connectors are kept in a fully connected state. Then, cylinder 52 retracts, causing the male and female connectors on clamp 55 to separate. At this time, the tension / compression analysis module obtains the maximum tensile force data when the male and female connectors are half separated and the maximum tensile force data when they are completely separated. The maximum tensile force data when half separated is recorded as f1. ＇ The maximum tensile force at complete separation is denoted as f2. ＇ .

[0060] When f1 ＇ ∈ (F1, F2) and f2 ＇ When ∈ (F1, F2), the overall tension is normal when the male and female connectors separate, and the connection between the male and female connectors is not affected by the above detection mode, and subsequent repeated visual inspections can be performed.

[0061] In other cases, if the tension is abnormal when the male and female connectors separate, the tension / compression analysis module will issue an alarm.

[0062] Specifically, in F1 ＇ =f2 ＇ When, if f1 ＇ ≤F1 and f2 ＇ ≤F1 indicates that the resistance is high when the male and female connectors separate, but low when the entire connector separates. In actual use in rail transit, this can easily lead to electrical circuit breaks due to loosening. If f1 ＇ ≥F2 and f2 ＇ ≥F2 indicates that the resistance is high in the first half when the male and female connectors are separated, and also high when the entire connector is separated. In actual use in rail transit, the connection may jam due to excessive tightness. In F1 ＇ ≠f2 ＇ When, if {f1 ＇ f2 ＇} max ≤F1 (i.e., f1) ＇ and f2 ＇When the maximum value in the range is less than or equal to F1, the resistance is high in the latter half when the male and female connectors separate, but low when the entire connector separates. In actual use in rail transit, this can easily lead to electrical circuit breaks due to loosening. If {f1} ＇ f2 ＇} max When the resistance is ≥F2, the resistance is high in the latter half when the male and female connectors are separated, and also high when the entire connector is separated. In actual use in rail transit, the connection may jam due to excessive tightness, affecting normal connection.

[0063] For male and female connectors with loose connections, repeated visual inspections are required to determine if the loosening is due to deformation. For male and female connectors with stuck connections, repeated visual inspections are not required, as the sticking is caused by deformation.

[0064] It should be noted that the first half of the connector when the male and female heads are connected corresponds to the second half when they are disconnected, and the second half when connected corresponds to the first half when disconnected. In other words, the first half of the male and female heads when connected is the area furthest from their ends, while the second half is the area closest to their ends. The boundary between the first and second halves is manually defined; it can be 50% insertion depth of the male head into the female head, or any other depth.

[0065] Step 5: After the safety performance test is completed, the connectors located on the clamping base 4 (i.e., the male and female connectors that passed the test in Step 4) are visually inspected again.

[0066] Specifically, motor 33 starts, driving the rotating table 32 and the female connector on the clamping seat 4 to rotate, so that the side of the female connector connected to the male connector faces the camera 6. The visual recognition module re-acquires the image captured by the camera 6. When the actual female connector connection surface does not match the standard graphic, the visual recognition module judges it as abnormal, issues an alarm, and rejects the connector, indicating that the strength of the male and female connector connection is low and easily deformed. When the actual female connector connection surface matches the standard graphic, the visual recognition module judges it as normal, indicating that the strength of the male and female connector connection is medium and meets the normal use and adjustment requirements of rail transit.

[0067] If the visual recognition module determines that the connection is normal after a re-visual inspection, the male and female connectors of the connector will be swapped to perform a performance test under abnormal conditions. If the safety performance test is completed and the visual recognition module still determines that the connection is normal after a re-visual inspection, the strength of the male and female connectors is high, which meets the requirements for abnormal use adjustment in rail transit.

[0068] For the male and female connectors that passed the inspection in step four, if the actual female connector connection surface does not match the standard pattern, the visual recognition module judges it as abnormal. When the male and female connectors are separated, the looseness indicates at least deformation of the female connector. If the actual female connector connection surface is the same as the standard pattern, the looseness when the male and female connectors are separated is caused by deformation of the male connector.

[0069] In summary, the present invention, through the above-described method, can perform safety performance testing of rail transit electrical systems under different operating environments, ensuring that the electrical systems maintain good connection performance under different environments and will not experience electrical circuit breaks or jamming due to vibration or shaking, thereby ensuring the safe operation of the rail transit system.

[0070] It should be noted that, in this invention, relational terms such as "first" and "second" are used merely 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.

[0071] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electrical safety performance testing device for rail transit, comprising a support (1), a vibration mechanism (2), a rotation mechanism (3), a clamping seat (4), a tension / compression testing mechanism (5), and a camera (6); characterized in that: The vibration mechanism (2) is located on the top of the support (1) and is used to simulate vertical, horizontal, and longitudinal vibrations. The rotation mechanism (3) is located at the top center of the vibration mechanism (2), and the clamping seat (4) is located at the top center of the rotation mechanism (3). The rotation mechanism (3) is used to rotate the connector clamped by the clamping seat (4). The tensile and compressive testing mechanism (5) is located on the support (1) and above one side of the vibration mechanism (2). The tensile and compressive testing mechanism (5) is used to perform tensile and compressive testing on the connector. The camera (6) is located on the vibration mechanism (2) and on one side of the tensile and compressive testing mechanism (5). The camera (6) is used to photograph the connector. It also includes an operating console (7), which is signal-connected to a vision recognition module and a tension / compression analysis module; the camera (6) is electrically connected to the vision recognition module, which is used to identify and analyze the condition of the connector; the tension / compression testing mechanism (5) is electrically connected to the tension / compression analysis module, which is used to acquire and analyze the pressure conditions of the male and female connectors before connection and separation, and the pressure conditions after connection and separation.

2. The electrical safety performance testing equipment for rail transit according to claim 1, characterized in that, The vibration mechanism (2) includes a vibration table (21), a vibration component one (22) and a vibration component two (23). The vibration table (21) is mounted on a support (1), the vibration component one (22) is mounted on the vibration table (21), and the vibration component two (23) is mounted on the vibration component one (22). The vibration table (21) is used for vertical vibration, the vibration component one (22) is used for horizontal vibration, and the vibration component two (23) is used for horizontal longitudinal vibration.

3. The electrical safety performance testing equipment for rail transit according to claim 2, characterized in that, The vibration table (21) includes a movable part and a driving part. The movable part includes a platform (211), four sets of guide columns (212) and four sets of springs (213). The platform (211) is located on the support (1). The four sets of guide columns (212) are fixed at the four corners of the bottom of the platform (211). The guide columns (212) are slidably connected to the support (1). The springs (213) are sleeved on the guide columns (212). One end of the springs (213) is fixedly connected to the support (1). The other end of the springs (213) is fixedly connected to a base. The base is fixed to the bottom of the guide column (212). The drive unit includes a motor (214), two sets of connecting plates (215), several rotating shafts (216), and several cams (217). The two sets of connecting plates (215) are fixed on the bracket (1) below the platform (211). The motor (214) is fixed on one side of one of the connecting plates (215). Each rotating shaft (216) is horizontally arranged and both ends are connected to the connecting plate (215) through bearings. The output end of the motor (214) is fixedly connected to one of the rotating shafts (216). Each rotating shaft (216) has a pulley and several cams (217) fixed on it. All the pulleys on the rotating shafts (216) are connected by belt drive. All the cams (217) have the same protrusion direction.

4. The electrical safety performance testing equipment for rail transit according to claim 1, characterized in that, The vibration assembly 1 (22) includes a movable part 2 and a driving part 2. The movable part 2 includes a slide (221) and a slide plate (222). The slide (221) is fixed to the top of the platform (211). A groove is provided on the upper surface of the slide (221). A protrusion is provided on the bottom surface of the slide plate (222) and is disposed in the groove. The slide plate (222) is slidably connected to the slide (221). The second drive unit includes a drive seat (223), a second motor (224), several second rotating shafts (225), several second cams (226), a stop plate (227), and several second springs (228). The drive seat (223) is fixed on the platform (211), and the second motor (224) is fixed on the top of the drive seat (223). Each second rotating shaft (225) is vertically arranged and both ends are connected to the drive seat (223) through bearings. The output end of the second motor (224) is fixedly connected to one of the second rotating shafts (225). Each second rotating shaft (225) has a pulley and a second cam (226) fixed on it. All the pulleys on the second rotating shafts (225) are connected by belt drive. All the second cams (226) have the same protrusion direction and their height corresponds to the height of the slide plate (222). The abutment (227) is fixed on the platform (211). The abutment (227) and the drive seat (223) are located on opposite sides of the slide plate (222). One end of each of the springs (228) is fixed to the side of the slide plate (222) away from the drive seat (223), and the other end of the springs (228) is fixedly connected to the abutment (227).

5. The electrical safety performance testing equipment for rail transit according to claim 1, characterized in that, The vibration component two (23) has the same structural principle as the vibration component one (22), and the setting direction of the vibration component two (23) is perpendicular to the setting direction of the vibration component one (22).

6. The electrical safety performance testing equipment for rail transit according to claim 1, characterized in that, The rotating mechanism (3) includes a support base (31), a rotating table (32), and a motor (33). The support base (31) is fixed to the top of the vibration component (23), the motor (33) is fixed to the top of the support base (31), the rotating table (32) is set on the top of the vibration component (23) and rotatably connected to the vibration component (23), and the output end of the motor (33) is connected to the rotating table (32) through gear transmission. The clamping seat (4) is fixed to the top of the rotating table (32).

7. The electrical safety performance testing equipment for rail transit according to claim 6, characterized in that, The tensile and compressive testing mechanism (5) includes a second support base (51), a cylinder (52), a lifting base (53), a tensile and compressive sensor (54), and a clamp (55). The second support base (51) is fixed on the bracket (1), the cylinder (52) is fixed on the top of the second support base (51), the lifting base (53) is fixedly connected to the output end of the cylinder (52), the lifting base (53) is used to control the lifting and lowering of the internal lifting slider, one end of the tensile and compressive sensor (54) is fixed on the lifting slider on the output end side of the lifting base (53), and the clamp (55) is fixed to the other end of the tensile and compressive sensor (54). The clamp (55) includes a driving unit ( The drive unit (551) and two sets of clamping parts (552) are connected to the output end of the drive unit (551). The drive unit (551) is used to drive the two sets of clamping parts (552) to move towards each other and away from each other to clamp and release the connector to be tested. The two sets of clamping parts (552) are respectively provided with grooves on the side close to each other. Each groove is provided with a pressure sensor (56). The two pressure sensors (56) are respectively provided with anti-slip pads on the side close to each other. The anti-slip pads are connected to the corresponding clamping parts (552). The tension and compression sensor (54) and the pressure sensor (56) are electrically connected to the tension and compression analysis module.

8. The electrical safety performance testing equipment for rail transit according to claim 4, characterized in that, The camera (6) is fixed on the top of the drive seat (223) of the vibration assembly (22) and close to the support seat (51) of the tension and compression test mechanism (5).

9. A method for testing the electrical safety performance of rail transit, the method being implemented based on the safety performance testing equipment described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Install and fix the male and female connectors of the connector to be tested onto the clamping base (4) and the fixture (55) respectively; Step 2: The camera (6) takes a picture of the connector on the clamp (4), and the visual recognition module visually detects the connector until the visual recognition module determines that it is normal; Step 3: Control the tensile and compressive testing mechanism (5) to move closer to the clamping seat (4) to complete the connection between the male and female connectors until the tensile and compressive analysis module determines that the overall pressure when the male and female connectors are connected is normal; Step 4: Perform safety performance testing on the connector under at least one of the following modes: vibration mode, rotation mode, tension / compression mode; Step 5: After the safety performance test is completed, the connector located on the clamp (4) is visually inspected again.

10. The method for testing the electrical safety performance of rail transit according to claim 9, characterized in that, The specific process of step three is as follows: the lifting seat (53) drives its lifting slider to adjust the height of the tension and pressure sensor (54) and the clamp (55) so that the height of the tension and pressure sensor (54) and the clamp (55) is consistent with the height of the connector to be tested held by the clamping seat (4). Then the cylinder (52) starts to extend so that the male head of the connector is connected to the female head. At this time, the tension and pressure analysis module obtains the maximum pressure data f1 when the male head is half connected to the female head and the maximum pressure data f2 when the connection is completed. The tension and compression analysis module has an optimal tension and compression data range set inside when the male and female connectors are connected. The optimal tension and compression data range is denoted as (F1, F2). F1 is the minimum tension force that will not cause loosening when the male and female connectors are connected, and F2 is the maximum tension force that will not cause jamming when the male and female connectors are connected. When f1∈(F1,F2) and f2∈(F1,F2), the overall pressure when the male and female connectors are connected is normal. In other cases, the abnormality is due to abnormal overall pressure when the male and female connectors are connected.

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