Device and method for automatically detecting contact impedance of connector

Abstract

The invention discloses a connector contact impedance automatic detection device and method, and is applied to the technical field of connector contact impedance detection.The connector contact impedance automatic detection device comprises a base, a driving box, a detection frame, a detection mechanism, an operation assembly, a temperature control box and a connector, the driving box and the detection frame are fixed to the top of the base, and the detection frame is arranged on one side of the driving box; the detection mechanism and the operation assembly are arranged on the side portion, close to the detection frame, of the driving box, the detection mechanism corresponds to the detection frame in position, the temperature control box is arranged in the driving box, the temperature control box corresponds to the detection frame in position, and the connector comprises a shell and a plurality of contact pieces arranged in the shell. The detection mechanism comprises a driving air cylinder, a detection head and a camera, the camera is electrically connected with a visual module, and the visual module is used for identifying the shape and the position of a contact piece of the connector, the detection steps can be simplified, and the detection efficiency can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of connector contact impedance detection, and in particular to a connector contact impedance automatic detection device and method. Background Art

[0002] Connector products are an important basic component of the equipment power supply and signal transmission system. The comprehensive performance and connection reliability of connector products determine the normal and reliable operation of the equipment system.

[0003] Contact resistance is an important technical indicator for connector products. It reflects the contact performance of the connector after mating and connection, and plays a key role in the power transmission voltage drop and signal transmission attenuation of the equipment system.

[0004] However, at present, when testing the contact resistance of connector products, manual testing is usually adopted, using a "DC low resistance tester" to test the contact resistance of connector products. During the manual testing process, the test clips of the "DC low resistance tester" need to be clamped on the tails of the connector contacts to test the contacts of the connector products one by one; moreover, during manual testing, the different clamping positions and clamping forces of the test clips have a greater impact on the accuracy of the detected contact resistance; especially for multi-core connector products with more than 20 cores, large-scale testing one by one, core by core, will not only consume a lot of testing time and manpower, but also lead to missed tests and wrong tests, resulting in increased testing costs and reduced testing accuracy.

[0005] Therefore, it is necessary to provide a connector contact impedance automatic detection device and method to solve the above problems. Summary of the invention

[0006] The object of the present invention is to provide a device and method for automatically detecting contact impedance of a connector, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions: a connector contact impedance automatic detection device, comprising a base, a drive box, a detection frame, a detection mechanism, an operating component, a temperature control box and a connector, wherein the drive box and the detection frame are fixed to the top of the base, the detection frame is arranged on one side of the drive box, the detection mechanism and the operating component are arranged on the side of the drive box close to the detection frame, the detection mechanism corresponds to the position of the detection frame, the temperature control box is arranged inside the drive box, the temperature control box corresponds to the position of the detection frame, and the connector comprises a shell and a plurality of contact members arranged inside the shell; The detection mechanism includes a driving cylinder, a detection head and a camera, wherein the camera is electrically connected to a visual module, and the visual module is used to identify the shape and position of the connector contact and determine whether the shape and position of the connector contact are normal; The detection head includes a cylinder, a pressure sensor 1 and a pressure sensor 2, wherein the pressure sensor 1 and the pressure sensor 2 are electrically connected to a pressure module, and the pressure module is used to obtain pressure data when plugging and unplugging before and after impedance detection; The operating assembly includes a console, a plurality of buttons, a humidity control terminal, a temperature control terminal and a tester. The tester is electrically connected to an impedance module. The impedance module is used to obtain the impedance of the contact and determine whether the impedance meets the requirements.

[0008] According to the above technical solution, the detection frame includes a dual-axis movable frame and a single-axis movable seat, the dual-axis movable frame is fixed to the top of the base, the dual-axis movable frame is located below the detection mechanism, a limiting groove is arranged on the top of the dual-axis movable frame, a driving part is arranged on the edge of the limiting groove on the top of the dual-axis movable frame, the driving part is a motor-driven gear rotation structure, the output end of the driving part is meshedly connected with a transmission gear, the transmission gear is located in the limiting groove and connected to the bearing of the dual-axis movable frame, and a clamp is fixedly connected to the top of the transmission gear.

[0009] According to the above technical solution, the single-axis movable seat 1 is fixed on the top of the base corresponding to the position of the double-axis movable frame. The single-axis movable seat 1 is located inside the drive box. The upper sliding connection of the single-axis movable seat 1 is connected to a connecting frame, and a clamp 2 is provided on the top of the connecting frame.

[0010] According to the above technical solution, the driving cylinder is fixed to the side of the driving box close to the detection frame, the output end of the driving cylinder is fixedly connected to a lifting seat, the bottom of the lifting seat is connected to a connecting seat, the detection head and the camera are fixed to the bottom of the connecting seat, and the detection head is arranged on the side of the connecting seat close to the dual-axis movable frame.

[0011] According to the above technical solution, the cylinder is fixed at the bottom center of the connecting seat, the cylinder is a hollow structure, the pressure sensor 1 and the pressure sensor 2 are arranged in the hollow part inside the cylinder, the pressure sensor 1 is fixed at the top inside the cylinder, and the pressure sensor 2 is fixed at the bottom inside the cylinder; Spring 1 and spring 2 are arranged inside the cylinder, spring 1 is fixed to the bottom of pressure sensor 1, spring 2 is fixed to the top of pressure sensor 2, both ends of spring 1 and pressure sensor 2 are fixedly connected with bottom plates, and the bottom plates are both in annular shape.

[0012] According to the above technical solution, a sliding column is slidably connected to the inside of the cylinder, a limiting block is fixedly connected to the inside of the cylinder, a sliding groove is arranged at the corresponding position of the sliding column, the second spring and the second pressure sensor are both arranged on the periphery of the sliding column, two groups of probes are fixedly connected to the bottom of the sliding column, a bending portion is arranged at the bottom of the probe, and the probe contains current and voltage contacts.

[0013] According to the above technical solution, the control console, buttons, and humidity control end are arranged in sequence from top to bottom on the side of the drive box close to the detection frame, the temperature control end is arranged on the side of the drive box close to the detection frame, and the temperature control end is arranged on the side of the humidity control end away from the drive cylinder. The tester is fixed to the top of the base, and the tester is arranged inside the drive box. The tester is connected to two groups of current wires and two groups of voltage wires, and the two groups of current wires are respectively connected to the current contacts on the two groups of probes, and the two groups of voltage wires are respectively connected to the voltage contacts on the two groups of probes.

[0014] According to the above technical solution, the console is signal-connected with the vision module, the pressure module and the impedance module, and the console is electrically connected with the detection frame, the detection mechanism, the operating assembly and the manipulator.

[0015] According to the above technical solution, the temperature control box includes a box body, an air inlet is provided on the top of the box body, the air inlet corresponds to the position of the center of the second fixture when the connecting frame is located on the first uniaxial movable seat away from the first end of the uniaxial movable seat, a ventilation port is provided on the side of the box body away from the double-axis movable frame, the pipeline at the air inlet is connected to an air inlet pipe, a mixing box and an air pump are provided on the air inlet pipe, a temperature control device and a humidity adjustment device are provided inside the mixing box, the pipeline at the ventilation port is connected to a ventilation pipe, a ventilation fan is provided on the ventilation pipe, and the temperature control device is connected to the temperature control end signal; An electric door is arranged on one side of the box body close to the double-axis movable frame.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: the present invention can respectively perform impedance detection on the upper, middle and lower parts of the contact piece by providing a detection head, covering the entire length of the contact piece, avoiding the one-sidedness of traditional single-point detection, and at the same time can buffer the impact force by the expansion and contraction of the spring one and the spring two, and can measure the position of the sliding column in real time in combination with the distance sensor, dynamically adjust the elongation of the driving cylinder, realize adaptive compensation of the contact height, and avoid test errors or damage caused by the position deviation of the contact piece; By setting up a pressure sensor and a camera, the contact impedance detection, plug-in force test and visual appearance detection can be completed simultaneously, reducing the detection process. At the same time, by setting up a temperature control box, the temperature and humidity of the connector environment can be quickly switched to simulate extreme or sudden environments, forming a closed space during the test and quickly ventilating after the test to ensure precise control of environmental parameters and test stability. The impedance and plug-in force tests after the mutation can be completed in the same device, further improving the detection efficiency and the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic side view of a part of the structure of the present invention; Figure 3 It is a schematic diagram of the internal structure of a part of the structure of the present invention from a side view; Figure 4 The present invention Figure 3 A schematic diagram of the enlarged structure of the middle A area; Figure 5 It is a schematic diagram of the overall structure of the present invention; Figure 6 The present invention Figure 5 Schematic diagram of the enlarged structure of the middle B area; Figure 7 It is a schematic diagram of the cross-sectional structure of the temperature control box of the present invention; In the figure: 1. Base; 2. Drive box; 3. Detection frame; 31. Double-axis moving frame; 32. Single-axis moving seat 1; 33. Driving unit; 34. Fixture 1; 35. Connecting frame; 36. Fixture 2; 37. Transmission gear; 4. Detection mechanism; 41. Driving cylinder; 42. Lifting seat; 43. Connecting seat; 44. Detection head; 441. Cylinder; 442. Pressure sensor 1; 443. Spring 1; 444. Sliding column; 445. Spring 2; 446. Pressure sensor 2; 447. Probe; 45. Camera; 5. Operation components; 51. Control console; 52. Button; 53. Humidity control terminal; 54. Temperature control terminal; 55. Tester; 6. Temperature control box; 61. Box body; 62. Air inlet; 63. Ventilation port; 64. Air inlet pipe; 65. Mixing box; 66. Air pump; 67. Ventilation pipe; 68. Ventilation fan; 69. Electric door. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-7 The present invention provides a technical solution: a connector contact impedance automatic detection device, comprising a base 1, a drive box 2, a detection frame 3, a detection mechanism 4, an operating component 5, a temperature control box 6 and a connector, the drive box 2 and the detection frame 3 are fixed to the top of the base 1, the detection frame 3 is arranged on one side of the drive box 2, the detection mechanism 4 and the operating component 5 are arranged on the side of the drive box 2 close to the detection frame 3, the detection mechanism 4 corresponds to the position of the detection frame 3, the temperature control box 6 is arranged inside the drive box 2, and the temperature control box 6 corresponds to the position of the detection frame 3. The connector comprises a shell and a plurality of contact members arranged inside the shell, the detection frame 3 is used to clamp and fix the connector to be detected and drive the connector to be detected into the temperature control box 6, the detection mechanism 4 is used to perform impedance detection on the connector to be detected on the detection frame 3, the operating component 5 is used to control the operation of the detection frame 3 and the detection mechanism 4 and the temperature and humidity adjustment inside the temperature control box 6, and the temperature control box 6 is used to adjust the temperature and humidity at the connector to be detected, so as to facilitate the subsequent impedance detection after the sudden change of the environment.

[0020] Specifically, Figure 2-Figure 4 As shown, the detection frame 3 includes a dual-axis movable frame 31 and a single-axis movable seat 32. The dual-axis movable frame 31 is fixed to the top of the base 1, and the dual-axis movable frame 31 is located below the detection mechanism 4. A limiting groove is provided on the top of the dual-axis movable frame 31, and a driving part 33 is provided on the edge of the limiting groove on the top of the dual-axis movable frame 31. The driving part 33 is a motor-driven gear rotation structure, and the output end of the driving part 33 is meshedly connected with a transmission gear 37. The transmission gear 37 is located in the limiting groove and is connected to the bearing of the dual-axis movable frame 31, and a fixture 34 is fixedly connected to the top of the transmission gear 37. The single-axis movable seat 32 is fixed on the top of the base 1 and corresponds to the position of the double-axis movable frame 31. The single-axis movable seat 32 is located inside the drive box 2. The single-axis movable seat 32 corresponds to the position of the double-axis movable frame 31. The upper sliding portion of the single-axis movable seat 32 is connected with a connecting frame 35. A clamp 2 36 is arranged on the top of the connecting frame 35. The double-axis movable frame 31 and the single-axis movable seat 32 are both driven by cylinders. The double-axis movable frame 31 is used to drive the clamp 1 34 to move parallel to the setting direction of the single-axis movable seat 32 and perpendicular to the setting direction of the single-axis movable seat 32. The single-axis movable seat 32 is used to drive the connecting frame 35 to drive the clamp 2 36 to move close to or away from the double-axis movable frame 31.

[0021] It should be noted that a robot for assisting in clamping the connector to be tested is provided on the side of the base 1; the clamp 1 34 and the clamp 2 36 are additional clamps driven by a motor screw for clamping, and the dual-axis movable frame 31, the single-axis movable seat 1 32, the clamp 1 34, and the clamp 2 36 are existing structures and will not be described in detail here.

[0022] In actual operation, the manipulator places the connector to be tested on the fixture 1 34, the fixture 1 34 clamps the connector, and the dual-axis movable frame 31 drives the connector on the fixture 1 34 to move to the bottom of the detection mechanism 4 for visual and impedance detection. After the detection is completed, the manipulator moves the connector that has passed the visual and impedance detection to the fixture 2 36, the fixture 2 36 clamps the connector, and the single-axis movable seat 1 32 drives the fixture 2 36 to move to the inside of the temperature control box 6 for temperature and humidity adjustment.

[0023] Specifically, Figure 3 and Figure 4 As shown, the detection mechanism 4 includes a driving cylinder 41, a detection head 44 and a camera 45. The driving cylinder 41 is fixed to the driving box 2 near the detection frame 3. The output end of the driving cylinder 41 is fixedly connected to a lifting seat 42. The bottom of the lifting seat 42 is connected to a connecting seat 43. The detection head 44 and the camera 45 are fixed to the bottom of the connecting seat 43. The detection head 44 is arranged on the side of the connecting seat 43 near the dual-axis movable frame 31. The detection head 44 is arranged above the dual-axis movable frame 31. The camera 45 is electrically connected to a visual module. The camera 45 is used to photograph the shape and position of the connector contact. The visual module is used to identify the shape and position of the connector contact and determine whether the shape and position of the connector contact are normal. The driving cylinder 41 is extended and retracted, and the detection head 44 and the camera 45 are driven to rise and fall through the lifting seat 42 and the connecting seat 43, so that the detection head 44 contacts the connector contact to perform impedance detection. Further, such as Figure 5 and Figure 6 As shown, the detection head 44 includes a cylinder 441, a pressure sensor 1 442 and a pressure sensor 2 446. The cylinder 441 is fixed to the bottom center of the connecting seat 43. The cylinder 441 is a hollow structure. The pressure sensor 1 442 and the pressure sensor 2 446 are arranged in the hollow part inside the cylinder 441. The pressure sensor 1 442 is fixed to the top inside the cylinder 441, and the pressure sensor 2 446 is fixed to the bottom inside the cylinder 441. The pressure sensor 1 442 and the pressure sensor 2 446 are electrically connected to a pressure module, and the pressure module is used to obtain pressure data when plugging and unplugging before and after impedance detection; A spring 1 443 and a spring 2 445 are arranged inside the cylinder 441. The spring 1 443 is fixed to the bottom of the pressure sensor 1 442, and the spring 2 445 is fixed to the top of the pressure sensor 2 446. Both ends of the spring 1 443 and the pressure sensor 2 446 are fixedly connected to a bottom plate, and the bottom plates are both annular. A sliding column 444 is slidably connected inside the cylinder 441, a limit block is fixedly connected inside the cylinder 441, a sliding groove is arranged at the corresponding position of the sliding column 444, a second spring 445 and a second pressure sensor 446 are arranged on the periphery of the sliding column 444, two groups of probes 447 are fixedly connected to the bottom of the sliding column 444, a bending portion is arranged at the bottom of the probe 447, and the probe 447 contains current and voltage contacts.

[0024] It should be noted that a distance sensor is provided in the hollow interior of the cylinder 441, and the distance sensor is fixed to the bottom of the pressure sensor 442, and is used to measure the distance from the top of the sliding column 444, thereby ensuring the length of the sliding column 444 extending out of the cylinder 441, so as to facilitate the subsequent control of the extension of the driving cylinder 41 according to the position of the sliding column 444 inside the cylinder 441, and adjust the actual extension length of the probe 447, so that the probe 447 corresponds to the position of the contact piece to be detected.

[0025] In actual operation, the driving cylinder 41 is extended, and the detection head 44 is driven to descend through the lifting seat 42 and the connecting seat 43, so that the probe 447 on the detection head 44 is inserted to the periphery of the contact piece. At this time, the contacts of the connector where the two groups of probes 447 are located are in contact. The spring 1 443 can buffer the impact force when the probe 447 contacts the connector contact. At the same time, the pressure sensor 1 442 obtains the pressure data of the sliding column 444 compressing the spring 1 443 when the probe 447 is inserted to the periphery of the contact piece, thereby obtaining the pressure when the connector contact is inserted. And avoid excessive impact force during insertion to damage the connector contacts; when the driving cylinder 41 is extended, the detection head 44 is driven to rise through the lifting seat 42 and the connecting seat 43, so that the probe 447 on the detection head 44 is pulled out from the contact piece of the connector, at this time, the contact between the two groups of probes 447 and the connector contact piece is released, and the spring 2 445 can buffer the pulling force when the probe 447 is pulled out. At the same time, the pressure sensor 2 446 obtains the pressure data of the sliding column 444 compressing the spring 2 445 when pulling out, thereby obtaining the plugging and unplugging force of the connector contact.

[0026] Specifically, Figure 2 and Figure 3As shown, the operating assembly 5 includes a control console 51, a plurality of buttons 52, a humidity control terminal 53, a temperature control terminal 54 and a tester 55. The control console 51, the buttons 52, and the humidity control terminal 53 are sequentially arranged on the side of the driving box 2 close to the detection frame 3 from top to bottom, the temperature control terminal 54 is arranged on the side of the driving box 2 close to the detection frame 3, and the temperature control terminal 54 is arranged on the side of the humidity control terminal 53 away from the driving cylinder 41. The tester 55 is fixed to the top of the base 1, and the tester 55 is arranged inside the driving box 2. The tester 55 is connected to two The two sets of current wires and two sets of voltage wires are respectively connected to the current contacts on the two sets of probes 447, and the two sets of voltage wires are respectively connected to the voltage contacts on the two sets of probes 447. Therefore, when the probes 447 are inserted to the periphery of the contact piece and contact the contact piece, the two sets of probes 447 and the tester 55 form a four-wire test loop through the two sets of current wires and the two sets of voltage wires. The button 52 is used to control the start and stop of the test, the humidity control terminal 53 is used to control the humidity adjustment, and the temperature control terminal 54 is used to control the temperature adjustment. The tester 55 is electrically connected to an impedance module, and the impedance module is used to obtain the impedance of the contact and determine whether the impedance meets the requirements.

[0027] The control console 51 is connected to the visual module, the pressure module and the impedance module by signal. The control console 51 is electrically connected to the detection frame 3, the detection mechanism 4, the operating component 5 and the manipulator. The control console 51 is used for displaying and controlling the rejection and supplementary testing.

[0028] Specifically, Figure 2 and Figure 7 As shown, the temperature control box 6 includes a box body 61, and an air inlet 62 is provided on the top of the box body 61. The air inlet 62 corresponds to the center of the clamp 2 36 when the connecting frame 35 is located on the uniaxial movable seat 1 32 away from the end of the uniaxial movable seat 1 32. A ventilation port 63 is provided on the side of the box body 61 away from the dual-axis movable frame 31. The pipeline at the air inlet 62 is connected to an air inlet pipe 64, and a mixing box 65 and an air pump 66 are arranged on the air inlet pipe 64. A temperature control device and a humidity adjustment device are arranged inside the mixing box 65. A ventilation pipe 67 is connected to the pipeline at the ventilation port 63, and a ventilation fan 68 is arranged on the ventilation pipe 67. The temperature control device is connected to the temperature control end 54 by signal. The temperature control device can be an electric heating wire and a refrigerator, which is used to control the gas temperature inside the mixing box 65. The humidity adjustment device is connected to the humidity control end 53 by signal. The humidity adjustment device can be a dehumidifier and a humidifier, which is used to adjust the gas humidity inside the mixing box 65. An electric door 69 is provided on one side of the box 61 close to the dual-axis movable frame 31. The electric door 69 is opened and closed to form a closed space inside the box 61, which is convenient for passing gases with different temperatures and humidities into the connector while avoiding affecting the normal detection of the detection mechanism 4.

[0029] In actual operation, the air pump 66 is started, and at the same time, the temperature control device and the humidity adjustment device inside the mixing box 65 are controlled to start as needed, to adjust the temperature and humidity of the gas inside the mixing box 65, and enter the box body 61 through the air inlet pipe 64 and the ventilation port 63 to adjust the temperature and humidity of the contact parts of the connector. The impedance detection of the connector in different temperature and humidity environments is then performed. After the simulation is completed, the air pump 66 is turned off and the ventilation fan 68 is started to promote the rapid flow of gas inside the box body 61, thereby preventing the internal gas of the box body 61 from gushing out from one side of the electric door 69 after the electric door 69 is opened, affecting the detection mechanism 4 and reducing the accuracy of the detection result.

[0030] Detection method of connector contact impedance automatic detection device: Step 1: Install the connector to be tested and perform a visual inspection.

[0031] Specifically, the staff sets the standard contact shape and position of the connector in the visual module. The standard contact shape and position are used to determine whether the contact in the connector meets the basic shape requirements. The visual module is provided with a motion track for the dual-axis moving frame 31 to drive the clamp 1 34 to move according to the standard contact position, so as to facilitate the subsequent continuous driving of the clamp 1 34 and the connector on the clamp 1 34 to move, thereby performing contact impedance detection on different contacts. The manipulator places the connector to be inspected on the fixture 34, the fixture 34 is clamped, the dual-axis mobile frame 31 drives the fixture 34 to the position directly below the detection head 44, the camera 45 takes pictures of the shape and position of the contact on the connector, and the visual inspection module obtains the shape and position of the contact on the connector, and compares and judges with the standard contact shape and position set in the visual module; When the shape and position of the contacts on the connector to be inspected meet the standard contact shape and position, the connector meets the appearance requirements in the production requirements and can be subsequently inspected; in other cases, the connector does not meet the appearance requirements in the production requirements and the visual module judges it as a defective product.

[0032] It should be noted that there are several recycling bins arranged around the base 1, including at least recycling bins for recycling qualified products, defective products, abnormal products and expanded unqualified products. When the connector inspection is completed, the control robot moves the connector to the corresponding recycling bin for classified placement according to the actual situation.

[0033] Step 2: In the impedance module, the descent height, pressure threshold 1, pressure threshold 2, impedance threshold and pressure threshold coefficient of the three probes 447 are preset.

[0034] Specifically, the three descending heights are h1, h2, and h3, respectively, h1<h2<h3, and the three descending heights correspond to the upper, middle, and lower parts of the contact, respectively. Since the opening side of the connector faces upward during detection, the upper part of the contact is close to the opening at this time, and the lower part of the contact is the root of the contact, that is, the part close to the connection with the connector.

[0035] The pressure threshold 1 is recorded as f, the pressure threshold 2 is recorded as F, and the pressure threshold coefficient is recorded as n. The pressure threshold 1 is used to determine whether the force when the probe 447 is inserted into the periphery of the contact piece before the contact impedance is tested is normal. The pressure threshold 2 is used to determine whether the force when the probe 447 is pulled out from the contact piece after the contact impedance test is tested is abnormal. The pressure threshold coefficient is used to limit the judgment interval of the pressure threshold, n∈(0,1), so that the insertion and extraction force test can be detected; The impedance threshold is denoted as R, and the impedance threshold is used to determine whether the impedance of different parts of the contact meets the requirements.

[0036] Step 3: The dual-axis moving frame 31 drives the clamped and fixed connector to run along a set trajectory, and the detection mechanism 4 performs a contact impedance test and an insertion and extraction force test on the connector to be detected.

[0037] Specifically, according to the three preset heights in the impedance module, the driving cylinder 41 is controlled to extend, driving the probe 447 to descend, and the contact impedance of the contact piece at different positions is detected by using the Kelvin detection mechanism 4-wire detection method. The actual impedances of the upper, middle and lower parts are recorded as R 上 , R 中 , R 下 .

[0038] First, the driving cylinder 41 is controlled to extend so that the probe 447 descends to a height of h1. The tester 55 is powered on to test the contact impedance of the upper part of the contact piece. At the same time, the pressure module obtains the pressure value detected by the pressure sensor 442. The pressure value detected by the pressure sensor 442 is recorded as f'. Afterwards, different methods can be selected to perform contact impedance detection according to the actual length of the contact piece or actual needs.

[0039] Method 1: Then control the driving cylinder 41 to contract, and then control the driving cylinder 41 to extend, so that the probe 447 drops to a height of h2, the tester 55 is powered on, and the contact impedance of the middle part of the contact piece is tested, and then the driving cylinder 41 is controlled to contract; then control the driving cylinder 41 to extend, so that the probe 447 drops to a height of h3, the tester 55 is powered on, and the contact impedance of the lower part of the contact piece is tested, and finally the driving cylinder 41 is controlled to contract, so as to obtain the actual impedance of the upper, middle and lower parts of the contact piece; Method 2: Then the lifting seat 42 is controlled to continue to extend, so that the detection head 44 is lowered to a height of h2, the tester 55 is powered on, and the contact impedance of the middle part of the contact piece is tested; then the lifting seat 42 is controlled to continue to extend, so that the probe 447 is lowered to a height of h3, the tester 55 is powered on, and the contact impedance of the lower part of the contact piece is tested; Finally, the driving cylinder 41 is controlled to contract, and at the same time, the pressure module obtains the pressure value detected by the second pressure sensor 446, the pressure value F' detected by the second pressure sensor 446, thereby obtaining the actual impedance of the upper, middle and lower parts of the contact and the insertion and extraction force of the contact.

[0040] Step 3-1: Contact impedance test; When R 上 , R 中 , R 下 When all are ≤R, the contact impedance test meets the requirements; in other cases, the contact impedance test does not meet the requirements.

[0041] Step 3-2: Insertion and extraction force test; When nf≤f'≤f, nF≤F'≤F, the plugging and unplugging force test meets the requirements; in other cases, the plugging and unplugging force test of the contact does not meet the requirements, and the contact is too tight or too loose during plugging and unplugging.

[0042] Step 3-3: Overall test result judgment; When the contact impedance test and insertion force test of all contacts on the same contactor meet the requirements, the contact can be subjected to subsequent extended tests; When more than one-third of the contact parts on the same contactor fail to meet the requirements of the contact impedance test, and more than one-third of the contact parts fail to meet the requirements of the plugging and unplugging force test, the contact impedance test and the plugging and unplugging force test of the connector both fail to meet the requirements, and the connector is judged as defective; In other cases, the connector needs to undergo subsequent supplementary testing to avoid misdetection that reduces the connector's pass rate.

[0043] It should be noted that, since a distance sensor is provided inside the hollow cylinder 441, the spring 445 can provide support for the sliding column 444. In the initial state, the distance measured by the distance sensor is the standard value. After that, when the driving cylinder 41 is extended to drive the probe 447 to descend and the probe 447 is inserted to the periphery of the contact piece, if the distance measured by the distance sensor decreases, it means that there is resistance between the probe 447 and the contact piece. At this time, the driving cylinder 41 can be controlled to continue to extend to compensate for the height required for the contact impedance test. The compensation height is the difference between the standard value and the actual value. The difference in distance, the compensation height is also the continued extension length of the driving cylinder 41; before continuing to extend the driving cylinder 41 and compensating for the required height for the contact impedance test, the resistance between the probe 447 and the contact piece can also be judged by the amount of distance reduction measured by the distance sensor. The larger the distance reduction value, the larger the resistance and the larger the plug-in force, while the smaller the distance reduction value, the smaller the resistance and the smaller the plug-in force, thereby assisting in the judgment of the plug-in force test of step three-two; similarly, when the extension continues in the future, the actual descent height of the probe 447 can also be adjusted to the set value according to this method.

[0044] Step 4: Supplementary test, adjust different angles to repeat the contact impedance test and insertion force test.

[0045] Specifically, the single-axis moving seat 32 is controlled to start, and the driving gear 37 drives the clamp 34 and the connector clamped and fixed on the clamp 34 to rotate, and the rotation is set to an angle. The specific angle needs to be set manually, and step three is repeated. If it is judged that the requirements are met after repetition, subsequent expansion tests are performed. If the original result is still maintained after repetition, the impedance module is judged to be an abnormal product.

[0046] Step 5: Expand the test to simulate the contact impedance test and insertion force test after sudden environmental changes.

[0047] Specifically, the manipulator moves the connector that meets the requirements of the contact impedance test and the plugging force test to the second fixture 36, and the single-axis movable seat 1 32 drives the second fixture 36 and the connector on the second fixture 36 to move to the inside of the box 61, so that the connecting frame 35 is located on the single-axis movable seat 1 32 away from the end of the double-axis movable frame 31, and then according to actual needs, the temperature control device and the humidity adjustment device in the mixing box 65 are controlled to start through the humidity control end 53 and the temperature control end 54 to adjust the temperature and humidity of the gas in the mixing box 65, and then the air pump 66 is started to pass the regulated gas into the box At the contact part of the connector in 61, a sudden environmental change is simulated, and the duration needs to be set manually; then the single-axis moving seat 1 32 drives the clamp 2 36 and the connector on the clamp 2 36 to move to the outside of the box 61, and the manipulator moves the connector to the clamp 1 34 again, and repeats step 3. If the requirements are still not met, the connector is judged to be a qualified product, and the rest are expanded unqualified products, so that the impedance change and plug-in force change of the connector after the sudden change of environmental factors can be obtained, thereby enriching the detection items of the automatic detection device and the accuracy of the detection results.

[0048] Step 6: Based on the obtained connector judgment result, control the robot to move the connector to the corresponding recycling box.

[0049] Through the above steps, the plugging force detection and the impedance detection and plugging force detection after sudden environmental changes can be performed simultaneously in the connector contact impedance detection, thereby enriching the detection items of the automatic detection device and the accuracy of the detection results, reducing the detection steps and improving the detection effect.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A connector contact impedance automatic detection device, comprising a base (1), a drive box (2), a detection frame (3), a detection mechanism (4), an operating component (5), a temperature control box (6) and a connector, characterized in that: The drive box (2) and the detection frame (3) are fixed to the top of the base (1); the detection frame (3) is arranged on one side of the drive box (2); the detection mechanism (4) and the operating assembly (5) are arranged on the side of the drive box (2) close to the detection frame (3); the detection mechanism (4) corresponds to the position of the detection frame (3); the temperature control box (6) is arranged inside the drive box (2); the temperature control box (6) corresponds to the position of the detection frame (3); and the connector comprises a shell and a plurality of contact members arranged inside the shell; The detection frame (3) comprises a dual-axis movable frame (31) and a single-axis movable seat (32); the dual-axis movable frame (31) is fixed to the top of the base (1); the dual-axis movable frame (31) is located below the detection mechanism (4); a limiting groove is provided on the top of the dual-axis movable frame (31); a driving part (33) is provided at the edge of the limiting groove on the top of the dual-axis movable frame (31); the driving part (33) is a motor-driven gear rotation structure; an output end of the driving part (33) is meshedly connected with a transmission gear (37); the transmission gear (37) is located in the limiting groove and is connected to a bearing of the dual-axis movable frame (31); and a clamp (34) is fixedly connected to the top of the transmission gear (37); The single-axis movable seat (32) is fixed on the top of the base (1) and corresponds to the position of the double-axis movable frame (31). The single-axis movable seat (32) is located inside the drive box (2). The upper part of the single-axis movable seat (32) is slidably connected to a connecting frame (35). The top of the connecting frame (35) is provided with a second clamp (36); The detection mechanism (4) comprises a driving cylinder (41), a detection head (44) and a camera (45); the camera (45) is electrically connected to a visual module, the visual module is used to identify the shape and position of the connector contact piece, and judge whether the shape and position of the connector contact piece are normal; the detection head (44) comprises a cylinder (441), a first pressure sensor (442) and a second pressure sensor (446); the first pressure sensor (442) and the second pressure sensor (446) are electrically connected to a pressure module, the pressure module is used to obtain pressure data when plugging and unplugging before and after impedance detection, and to judge the plugging and unplugging force; The operating component (5) comprises a control console (51), a plurality of buttons (52), a humidity control terminal (53), a temperature control terminal (54) and a tester (55). The tester (55) is electrically connected to an impedance module. The impedance module is used to obtain the impedance of the contact and determine whether the impedance meets the requirements.

2. A connector contact impedance automatic detection device according to claim 1, characterized in that: The driving cylinder (41) is fixed to a side of the driving box (2) close to the detection frame (3); the output end of the driving cylinder (41) is fixedly connected to a lifting seat (42); the bottom of the lifting seat (42) is connected to a connecting seat (43); the detection head (44) and the camera (45) are fixed to the bottom of the connecting seat (43); and the detection head (44) is arranged on a side of the connecting seat (43) close to the dual-axis movable frame (31).

3. The connector contact impedance automatic detection device according to claim 2, characterized in that: The cylinder (441) is fixed to the bottom center of the connecting seat (43); the cylinder (441) is a hollow structure; the pressure sensor 1 (442) and the pressure sensor 2 (446) are arranged in the hollow part inside the cylinder (441); the pressure sensor 1 (442) is fixed to the top inside the cylinder (441); and the pressure sensor 2 (446) is fixed to the bottom inside the cylinder (441); A spring 1 (443) and a spring 2 (445) are arranged inside the cylinder (441); the spring 1 (443) is fixed to the bottom of the pressure sensor 1 (442); the spring 2 (445) is fixed to the top of the pressure sensor 2 (446); both ends of the spring 1 (443) and the pressure sensor 2 (446) are fixedly connected to a bottom plate, and the bottom plates are both annular.

4. The connector contact impedance automatic detection device according to claim 3, characterized in that: The cylinder (441) is slidably connected to a sliding column (444), a limit block is fixedly connected to the cylinder (441), a sliding groove is arranged at a corresponding position of the sliding column (444), the second spring (445) and the second pressure sensor (446) are arranged on the periphery of the sliding column (444), two groups of probes (447) are fixedly connected to the bottom of the sliding column (444), a bending portion is arranged at the bottom of the probe (447), and the probe (447) contains current and voltage contacts.

5. The connector contact impedance automatic detection device according to claim 4, characterized in that: The control console (51), the button (52), and the humidity control terminal (53) are arranged in sequence from top to bottom on the side of the drive box (2) close to the detection frame (3); the temperature control terminal (54) is arranged on the side of the drive box (2) close to the detection frame (3); the temperature control terminal (54) is arranged on the side of the humidity control terminal (53) away from the drive cylinder (41); the tester (55) is fixed to the top of the base (1); the tester (55) is arranged inside the drive box (2); the tester (55) is connected to two groups of current wires and two groups of voltage wires; the two groups of current wires are respectively connected to the current contacts on the two groups of probes (447); and the two groups of voltage wires are respectively connected to the voltage contacts on the two groups of probes (447).

6. The connector contact impedance automatic detection device according to claim 5, characterized in that: The console (51) is signal-connected to the vision module, the pressure module and the impedance module, and the console (51) is electrically connected to the detection frame (3), the detection mechanism (4) and the operating component (5).

7. The connector contact impedance automatic detection device according to claim 6, characterized in that: The temperature control box (6) comprises a box body (61), the top of the box body (61) is provided with an air inlet (62), the air inlet (62) and the connecting frame (35) are located on the single-axis movable seat (32), and correspond to the center position of the clamp (36) when away from the end of the single-axis movable seat (32), the box body (61) is provided with a ventilation port (63) on the side away from the double-axis movable frame (31), the pipeline at the air inlet (62) is connected to an air inlet pipe (64), the air inlet pipe (64) is provided with a mixing box (65) and an air pump (66), the mixing box (65) is provided with a temperature control device and a humidity adjustment device, the pipeline at the ventilation port (63) is connected to a ventilation pipe (67), the ventilation pipe (67) is provided with a ventilation fan (68), the temperature control device is connected to the temperature control end (54) by signal, and the humidity adjustment device is connected to the humidity control end (53) by signal. An electric door (69) is provided on one side of the box body (61) close to the dual-axis movable frame (31).

8. A detection method of a connector contact impedance automatic detection device, which is implemented based on the connector contact impedance automatic detection device of claim 7, characterized in that: The detection method of the connector contact impedance automatic detection device is as follows: Step 1: Install the connector to be tested and perform appearance inspection; Step 2: In the impedance module, the descent height, pressure threshold 1, pressure threshold 2, impedance threshold and pressure threshold coefficient of the three probes (447) are preset; Step 3: The dual-axis moving frame (31) drives the clamped and fixed connector to run along a set trajectory, and the detection mechanism (4) performs a contact impedance test and an insertion and extraction force test on the connector to be detected; Step 4: Supplementary test, adjust different angles to repeat the contact impedance test and insertion force test; Step 5: Extended testing, contact impedance testing and insertion force testing after simulating sudden changes in the environment; Step 6: Based on the obtained connector judgment result, control the robot arm to move the connector to the corresponding recycling box.

Images