An automatic detection device and method for the contact impedance of a connector

Abstract

The present invention discloses an automatic detection device and method for the contact impedance of a connector, which are applied to the technical field of connector contact impedance detection. The device includes a base, a drive box, a detection frame, a detection mechanism, an operation component, a temperature control box and a connector. The drive box and the detection frame are fixed on the top of the base. The detection frame is arranged on one side of the drive box. The detection mechanism and the operation 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 and corresponds to the position of the detection frame. The connector includes a housing and a plurality of contact pieces arranged inside the housing. The detection mechanism includes a driving cylinder, a detection head and a camera. The camera is electrically connected to a vision module, and the vision module is used to identify the shape and position of the contact pieces of the connector. The present invention can simplify the detection steps and improve the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of connector contact impedance detection, and particularly to an automatic connector contact impedance 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] For connector products, contact resistance is an important technical indicator, which reflects the contact performance after the connector is inserted and connected, and plays a crucial role in the power transmission voltage drop and signal transmission attenuation of the equipment system.

[0004] However, currently, when detecting the contact resistance of connector products, the manual detection method is usually adopted, and a "DC low resistance tester" is used to detect the contact resistance of connector products. During the manual detection process, the test clips of the "DC low resistance tester" need to be respectively clamped on the tails of the contact parts of the connector, and each contact part of the connector product is detected one by one; moreover, during manual detection, the clamped parts of the test clips are different, and the clamping forces are different, which has a great impact on the accuracy of the detected contact resistance; especially for multi-core connector products with more than 20 cores, detecting them one by one, core by core in large quantities will not only consume a large amount of detection time and manpower, but also result in missed detection and misdetection, leading to an increase in detection costs and a decrease in detection accuracy.

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

[0006] The purpose of the present invention is to provide an automatic connector contact impedance detection device and method to solve the problems raised in the above background art.

[0007] To solve the above technical problems, the present invention provides the following technical solution: An automatic connector contact impedance detection device includes a base, a drive box, a detection rack, a detection mechanism, an operation component, a temperature control box, and a connector. The drive box and the detection rack are fixed on the top of the base. The detection rack is arranged on one side of the drive box. The detection mechanism and the operation component are arranged on the side of the drive box close to the detection rack. The detection mechanism corresponds to the position of the detection rack. The temperature control box is arranged inside the drive box and corresponds to the position of the detection rack. The connector includes a housing and a plurality of contact parts arranged inside the housing.

[0008] The detection mechanism includes a driving cylinder, a detection head, and a camera. The camera is electrically connected to a vision module, and the vision module is used to identify the shape and position of the contact parts of the connector and determine whether the shape and position of the contact parts of the connector are normal;

[0009] The detection head includes a cylinder body, a first pressure sensor, and a second pressure sensor. The first pressure sensor and the second pressure sensor are electrically connected to a pressure module, and the pressure module is used to obtain the pressure data during the insertion and extraction before and after impedance detection;

[0010] The operation component includes a console, several buttons, a humidity control terminal, a temperature control terminal, and a tester. The tester is electrically connected to an impedance module, and the impedance module is used to obtain the impedance of the contact parts and determine whether the impedance meets the requirements.

[0011] According to the above technical solution, the detection frame includes a double-axis moving frame and a single-axis moving seat I. The double-axis moving frame is fixed to the top of the base. The double-axis moving frame is located below the detection mechanism. A limiting groove is provided at the top of the double-axis moving frame. A driving part is provided at the edge of the limiting groove at the top of the double-axis moving frame. The driving part is a motor-driven gear rotation structure. The output end of the driving part is meshed and connected with a transmission gear. The transmission gear is located in the limiting groove and is connected to the double-axis moving frame by bearings. A fixture I is fixedly connected to the top of the transmission gear.

[0012] According to the above technical solution, the single-axis moving seat I is fixed to the top of the base corresponding to the double-axis moving frame. The single-axis moving seat I is located inside the driving box. A connecting frame is slidably connected to the single-axis moving seat I. A fixture II is provided at the top of the connecting frame.

[0013] According to the above technical solution, the driving cylinder is fixed to one side of the driving box close to the detection frame. The output end of the driving cylinder is fixedly connected with a lifting seat. A connecting seat is connected to the bottom of the lifting seat. The detection head and the camera are fixed to the bottom of the connecting seat. The detection head is arranged on the side of the connecting seat close to the double-axis moving frame.

[0014] According to the above technical solution, the cylinder body is fixed to the center of the bottom of the connecting seat. The cylinder body is a hollow structure. The first pressure sensor and the second pressure sensor are arranged in the hollow part inside the cylinder body. The first pressure sensor is fixed to the top inside the cylinder body. The second pressure sensor is fixed to the bottom inside the cylinder body;

[0015] A first spring and a second spring are arranged inside the cylinder body. The first spring is fixed to the bottom of the first pressure sensor. The second spring is fixed to the top of the second pressure sensor. Both ends of the first spring and the second pressure sensor are fixedly connected with bottom plates, and the bottom plates are both circular rings.

[0016] According to the above technical solution, a sliding column is slidably connected inside the cylinder body, a limiting block is fixedly connected inside the cylinder body, a chute is arranged at the corresponding position of the sliding column, the second spring and the second pressure sensor are both arranged outside the sliding column, two groups of probes are fixedly connected to the bottom of the sliding column, a bending part is arranged at the bottom of the probe, and current and voltage contacts are arranged on the probe.

[0017] According to the above technical solution, the control console, the button, and the humidity control end are sequentially arranged from top to bottom on the side of the driving box close to the detection rack, the temperature control end is arranged on the side of the driving box close to the detection rack, the temperature control end is arranged on the side away from the driving cylinder of the humidity control end, the tester is fixed on the top of the base, the tester is arranged inside the driving box, the tester is connected with two groups of current wires and two groups of voltage wires, the two groups of current wires are respectively connected with the current contacts on the two groups of probes, and the two groups of voltage wires are respectively connected with the voltage contacts on the two groups of probes.

[0018] According to the above technical solution, the control console is signal-connected to the vision module, the pressure module, and the impedance module, and the control console is electrically connected to the detection rack, the detection mechanism, the operation component, and the mechanical flashlight.

[0019] According to the above technical solution, the temperature control box includes a box body, an air inlet is opened at the top of the box body, the air inlet corresponds to the center position of the fixture two when the connecting frame is at the end away from the single-axis moving seat on the single-axis moving seat one, a ventilation port is opened on the side of the box body away from the double-axis moving frame, an air inlet pipe is connected to the air inlet through a pipeline, a mixing box and an air pump are arranged on the air inlet pipe, a temperature control device and a humidity adjustment device are arranged inside the mixing box, a ventilation pipe is connected to the ventilation port through a pipeline, a ventilation fan is arranged on the ventilation pipe, and the temperature control device is signal-connected to the temperature control end;

[0020] An electric door is arranged on the side of the box body close to the double-axis moving frame.

[0021] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: in the present invention, by providing a detection head, impedance detection can be performed on the upper, middle, and lower parts of the contact piece respectively, covering the entire length of the contact piece, avoiding the one-sidedness of traditional single-point detection. At the same time, the impact force can be buffered by the telescopic of the first spring and the second spring, and the position of the sliding column is measured in real time by the distance sensor, and the elongation of the driving cylinder is dynamically adjusted to realize adaptive compensation of the contact height, avoiding test errors or damages caused by the position deviation of the contact piece.

[0022] By setting a pressure sensor and a camera, the synchronous completion of contact impedance detection, insertion and extraction force testing, and visual appearance detection is achieved, reducing the detection process. At the same time, by setting a temperature control box, the temperature and humidity of the environment where the connector is located can be quickly switched, simulating extreme or mutated environments, forming a sealed space during testing, and quickly ventilating after testing to ensure the precise control of environmental parameters and test stability, and completing the impedance and insertion and extraction force testing after mutation within the same device, further improving the detection efficiency and the accuracy of detection results. Brief Description of the Drawings

[0023] The 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 to the present invention. In the drawings:

[0024] Figure 1 is the schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is the schematic side view of a partial structure of the present invention;

[0026] Figure 3 is the schematic side view of the internal structure of a partial structure of the present invention;

[0027] Figure 4 is the Figure 3 schematic enlarged view of area A in the present invention;

[0028] Figure 5 is the schematic front view of the overall structure of the present invention;

[0029] Figure 6 is the Figure 5 schematic enlarged view of area B in the present invention;

[0030] Figure 7 is the schematic sectional view of the temperature control box of the present invention;

[0031] In the figure: 1. Base; 2. Driving box;

[0032] 3. Detection frame; 31. Biaxial moving frame; 32. Uniaxial moving seat one; 33. Driving part; 34. Fixture one; 35. Connecting frame; 36. Fixture two; 37. Transmission gear;

[0033] 4. Detection mechanism; 41. Driving cylinder; 42. Lifting seat; 43. Connecting seat; 44. Detection head; 441. Cylinder body; 442. Pressure sensor one; 443. Spring one; 444. Sliding column; 445. Spring two; 446. Pressure sensor two; 447. Probe; 45. Camera;

[0034] 5. Operating components; 51. Console; 52. Button; 53. Humidity control terminal; 54. Temperature control terminal; 55. Tester;

[0035] 6. Temperature control box; 61. Box body; 62. Air inlet; 63. Ventilation opening; 64. Air inlet pipe; 65. Mixing box; 66. Air pump; 67. Ventilation pipe; 68. Exhaust fan; 69. Electric door. Detailed implementation manners

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Please refer to Figures 1-7 , the present invention provides a technical solution: an automatic detection device for the contact impedance of a connector, including a base 1, a drive box 2, a detection rack 3, a detection mechanism 4, an operation component 5, a temperature control box 6 and a connector. The drive box 2 and the detection rack 3 are fixed on the top of the base 1. The detection rack 3 is arranged on one side of the drive box 2. The detection mechanism 4 and the operation component 5 are arranged on the side of the drive box 2 close to the detection rack 3. The position of the detection mechanism 4 corresponds to that of the detection rack 3. The temperature control box 6 is arranged inside the drive box 2, and the position of the temperature control box 6 corresponds to that of the detection rack 3. The connector includes a housing and a plurality of contact pieces arranged inside the housing. The detection rack 3 is used for clamping and fixing the connector to be detected and driving the connector to be detected into the temperature control box 6. The detection mechanism 4 is used for detecting the impedance of the connector to be detected on the detection rack 3. The operation component 5 is used for controlling the operations of the detection rack 3 and the detection mechanism 4 and adjusting the temperature and humidity inside the temperature control box 6. The temperature control box 6 is used for adjusting the temperature and humidity at the position of the connector to be detected, which is convenient for subsequent impedance detection after environmental mutation.

[0038] Specifically, as Figures 2-4 shown, the detection rack 3 includes a biaxial moving frame 31 and a uniaxial moving seat 32. The biaxial moving frame 31 is fixed on the top of the base 1. The biaxial moving frame 31 is located below the detection mechanism 4. A limiting groove is arranged on the top of the biaxial moving frame 31. A driving part 33 is arranged on the edge of the limiting groove at the top of the biaxial moving frame 31. The driving part 33 is a motor-driven gear rotation structure. The output end of the driving part 33 is meshed and connected with a transmission gear 37. The transmission gear 37 is located in the limiting groove and is connected to the biaxial moving frame 31 by bearings. A fixture 34 is fixedly connected to the top of the transmission gear 37;

[0039] The single-axis moving base 32 is fixed to the top of the base 1 corresponding to the position of the double-axis moving frame 31. The single-axis moving base 32 is located inside the drive box 2. The single-axis moving base 32 corresponds to the position of the double-axis moving frame 31. A connecting frame 35 is slidably connected to the upper part of the single-axis moving base 32. A second fixture 36 is provided at the top of the connecting frame 35. Both the double-axis moving frame 31 and the single-axis moving base 32 are driven by air cylinders. The double-axis moving frame 31 is used to drive the first fixture 34 to move in the direction parallel to the setting direction of the single-axis moving base 32 and in the direction perpendicular to the setting direction of the single-axis moving base 32. The single-axis moving base 32 is used to drive the connecting frame 35 to drive the second fixture 36 to approach or move away from the double-axis moving frame 31.

[0040] It should be noted that a manipulator for assisting in clamping the connector to be detected is provided on the side of the base 1; the first fixture 34 and the second fixture 36 are clamping fixtures driven by a motor screw. The double-axis moving frame 31, the single-axis moving base 32, the first fixture 34, and the second fixture 36 are existing structures and will not be elaborated here.

[0041] In actual operation, the manipulator places the connector to be detected on the first fixture 34. The first fixture 34 clamps the connector. The double-axis moving frame 31 drives the connector on the first fixture 34 to move below the detection mechanism 4 for vision and impedance detection. After the detection is completed, the manipulator moves the connector qualified in vision and impedance detection to the second fixture 36. The second fixture 36 clamps the connector. The single-axis moving base 32 drives the second fixture 36 to move into the temperature control box 6 for temperature and humidity adjustment.

[0042] Specifically, as Figure 3 and Figure 4 shown, the detection mechanism 4 includes a driving air cylinder 41, a detection head 44, and a camera 45. The driving air cylinder 41 is fixed to the drive box 2 close to the detection frame 3. The output end of the driving air cylinder 41 is fixedly connected to a lifting seat 42. A connecting seat 43 is connected to the bottom of the lifting seat 42. The detection head 44 and the camera 45 are fixed to the bottom of the connecting seat 43. The detection head 44 is provided on the side of the connecting seat 43 close to the double-axis moving frame 31. The detection head 44 is arranged above the double-axis moving frame 31. The camera 45 is electrically connected to a vision module. The camera 45 is used to photograph the shape and position of the contact of the connector. The vision module is used to identify the shape and position of the contact of the connector and judge whether the shape and position of the contact of the connector are normal. The driving air cylinder 41 expands and contracts to drive the detection head 44 and the camera 45 to lift through the lifting seat 42 and the connecting seat 43, so that the detection head 44 contacts the contact of the connector for impedance detection;

[0043] Furthermore, as Figure 5 and Figure 6As shown in the figure, the detection head 44 includes a cylinder body 441, a first pressure sensor 442, and a second pressure sensor 446. The cylinder body 441 is fixed at the center of the bottom of the connecting seat 43. The cylinder body 441 has a hollow structure. The first pressure sensor 442 and the second pressure sensor 446 are arranged in the hollow part inside the cylinder body 441. The first pressure sensor 442 is fixed at the top inside the cylinder body 441, and the second pressure sensor 446 is fixed at the bottom inside the cylinder body 441. The first pressure sensor 442 and the second pressure sensor 446 are electrically connected to a pressure module, and the pressure module is used to obtain the pressure data during the insertion and extraction before and after impedance detection.

[0044] A first spring 443 and a second spring 445 are arranged inside the cylinder body 441. The first spring 443 is fixed at the bottom of the first pressure sensor 442, and the second spring 445 is fixed at the top of the second pressure sensor 446. Both ends of the first spring 443 and the second pressure sensor 446 are fixedly connected with bottom plates, and the bottom plates are both circular rings.

[0045] A sliding column 444 is slidably connected inside the cylinder body 441. A limiting block is fixedly connected inside the cylinder body 441. A chute is arranged at the corresponding position of the sliding column 444. The second spring 445 and the second pressure sensor 446 are both arranged outside the sliding column 444. Two groups of probes 447 are fixedly connected to the bottom of the sliding column 444. A bending part is arranged at the bottom of the probes 447, and current and voltage contacts are provided on the probes 447.

[0046] It should be noted that a distance sensor is arranged inside the hollow of the cylinder body 441. The distance sensor is fixed at the bottom of the first pressure sensor 442 and is used to measure the distance to the top of the sliding column 444, so as to ensure the length of the sliding column 444 extending out of the cylinder body 441. It is convenient to control the elongation of the driving cylinder 41 according to the position of the sliding column 444 inside the cylinder body 441 later, and adjust the actual elongation length of the probes 447 so that the probes 447 correspond to the positions of the contact parts to be detected.

[0047] In actual operation, the driving cylinder 41 extends, driving the detection head 44 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 member. At this time, the two groups of probes 447 are in contact with the contacts of the connector. The first spring 443 can buffer the impact force when the probe 447 contacts the connector contact. At the same time, when the probe 447 is inserted to the periphery of the contact member, the pressure sensor 442 obtains the pressure data of the sliding column 444 compressing the first spring 443, so as to obtain the pressure when the connector contact is inserted and avoid damaging the connector contact due to excessive impact force during insertion; when the driving cylinder 41 extends and drives the detection head 44 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 member of the connector, at this time, the contact between the two groups of probes 447 and the contact member of the connector is released. The second spring 445 can buffer the pulling force when the probe 447 is pulled out. At the same time, when pulled out, the pressure sensor 446 obtains the pressure data of the sliding column 444 compressing the second spring 445, so as to obtain the insertion and extraction force of the connector contact.

[0048] Specifically, as Figure 2 and Figure 3 shown, the operation component 5 includes a console 51, a plurality of buttons 52, a humidity control terminal 53, a temperature control terminal 54 and a tester 55. The console 51, the buttons 52 and the humidity control terminal 53 are sequentially arranged from top to bottom on the side of the driving box 2 close to the detection frame 3. The temperature control terminal 54 is arranged on the side of the driving box 2 close to the detection frame 3. The temperature control terminal 54 is arranged on the side away from the driving cylinder 41 of the humidity control terminal 53. The tester 55 is fixed on the top of the base 1. The tester 55 is arranged inside the driving box 2. The tester 55 is connected with two groups of current wires and two groups of voltage wires. The two groups of current wires are respectively connected with the current contacts on the two groups of probes 447, and the two groups of voltage wires are respectively connected with the voltage contacts on the two groups of probes 447. Therefore, when the probe 447 is inserted to the periphery of the contact member and contacts the contact member, a four-wire method test circuit is formed between the two groups of probes 447 and the tester 55 through the two groups of current wires and the two groups of voltage wires. The button 52 is used to control the start and stop of the detection. The humidity control terminal 53 is used to control humidity adjustment. The temperature control terminal 54 is used to control temperature adjustment;

[0049] The tester 55 is electrically connected with an impedance module, and the impedance module is used to obtain the impedance of the contact member and judge whether the impedance meets the requirements.

[0050] The console 51 is signal-connected with the vision module, the pressure module and the impedance module. The console 51 is mechanically connected with the detection frame 3, the detection mechanism 4, the operation component 5 and the mechanical hand. The console 51 is used to display and control rejection and supplementary testing.

[0051] Specifically, as Figure 2 and Figure 7As shown in the figure, the temperature control box 6 includes a box body 61. An air inlet 62 is provided at the top of the box body 61. The air inlet 62 corresponds to the center position of the fixture two 36 when the connecting frame 35 is located on the single-axis moving seat one 32 away from the end of the single-axis moving seat one 32. A ventilation opening 63 is provided on one side of the box body 61 away from the double-axis moving frame 31. A pipeline at the air inlet 62 is connected to an air inlet pipe 64. An air 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 air mixing box 65. A pipeline at the ventilation opening 63 is connected to an air exchange pipe 67. An air exchange fan 68 is arranged on the air exchange pipe 67. The temperature control device is in signal connection with the temperature control terminal 54. The temperature control device can be an electric heating wire and a refrigerator, which are used to control the gas temperature inside the air mixing box 65. The humidity adjustment device is in signal connection with the humidity control terminal 53. The humidity adjustment device can be a dehumidifier and a humidifier, which are used to adjust the gas humidity inside the air mixing box 65;

[0052] An electric door 69 is arranged on one side of the box body 61 close to the double-axis moving frame 31. The opening and closing of the electric door 69 are used to form a closed space inside the box body 61, which is convenient for introducing gases with different temperatures and humidities into the connector, and at the same time avoids affecting the normal detection of the detection mechanism 4.

[0053] In actual operation, the air pump 66 is started. At the same time, according to needs, the temperature control device and the humidity adjustment device inside the air mixing box 65 are started to adjust the temperature and humidity of the gas inside the air mixing box 65. The gas enters the inside of the box body 61 through the air inlet pipe 64 and the ventilation opening 63, and the temperature and humidity of the contact parts of the connector are adjusted. After the change, the impedance detection of the connector in different temperature and humidity environments is carried out subsequently. After the simulation is completed, the air pump 66 is closed, and the air exchange fan 68 is started to promote the rapid flow of the gas inside the box body 61, so as to avoid the gas inside the box body 61 gushing out from one side of the electric door 69 and affecting the detection mechanism 4 after the electric door 69 is opened, and reducing the accuracy of the detection result.

[0054] Detection method of the automatic detection device for the contact impedance of the connector:

[0055] Step 1: Install the connector to be detected and perform an appearance inspection.

[0056] Specifically, the staff set the standard contact part shape and position of the connector in the vision module. The standard contact part shape and position are used to judge whether the contact parts in the connector can meet the basic shape requirements. The movement trajectory of the double-axis moving frame 31 driving the fixture one 34 to move is set in the vision module according to the standard contact part position, which is convenient for subsequently continuously driving the fixture one 34 and the connector on the fixture one 34 to move, so as to detect the contact impedance of different contact parts;

[0057] The manipulator places the connector to be detected on the first fixture 34, the first fixture 34 clamps it, the dual-axis moving frame 31 drives the first fixture 34 to directly below the detection head 44, the camera 45 takes pictures of the shape and position of the contacts on the connector, and the vision detection module obtains the pictures of the shape and position of the contacts on the connector and compares and judges them with the standard shape and position of the contacts set in the vision module;

[0058] When the shape and position of the contacts on the connector to be detected meet the standard shape and position of the contacts, it means that the connector meets the appearance requirements in the production requirements and can be subjected to subsequent detections; in other cases, it means that the connector does not meet the appearance requirements in the production requirements, and the vision module judges it as a defective product.

[0059] It should be noted that several recycling bins are arranged around the base 1, including at least recycling bins for recycling qualified products, defective products, abnormal products and extended unqualified products. After the connector detection is completed, the manipulator is controlled to move the connector to the corresponding recycling bin for classified placement according to the actual situation.

[0060] Step two: In the impedance module, preset the descending heights of three types of probes 447, the first pressure threshold, the second pressure threshold, the impedance threshold and the pressure threshold coefficient.

[0061] Specifically, the three descending heights are h1, h2, and h3 respectively, h1 < h2 < h3, and the three descending heights respectively correspond to the upper, middle, and lower parts of the contacts. Since the opening side of the connector faces upward during detection, at this time, the upper part of the contact is close to the opening once, and the lower part of the contact is the root of the contact, that is, the part close to the connection with the connector.

[0062] The first pressure threshold is denoted as f, the second pressure threshold is denoted as F, and the pressure threshold coefficient is denoted as n. The first pressure threshold is used to judge whether the force is normal when the probe 447 is inserted to the periphery of the contact before performing the contact impedance. The second pressure threshold is used to judge whether the force is abnormal when the probe 447 is pulled out from the contact after testing the contact impedance detection. The pressure threshold coefficient is used to limit the judgment interval of the pressure threshold, n ∈ (0, 1), so as to be able to detect the insertion and extraction force test;

[0063] The impedance threshold is denoted as R, and the impedance threshold is used to judge whether the impedance of different parts of the contact meets the requirements.

[0064] Step three: The dual-axis moving frame 31 drives the clamped and fixed connector to run along a set trajectory, and the detection mechanism 4 performs contact impedance testing and insertion and extraction force testing on the connector to be detected.

[0065] Specifically, according to the three preset heights in the impedance module, control the driving cylinder 41 to extend, drive the probe 447 to descend, and use the 4-wire detection method of the Kelvin detection mechanism to detect the contact impedance at different positions of the contact part. Record the obtained actual impedances at the upper, middle, and lower parts as R 上 、R 中 、R 下 。

[0066] First, control the driving cylinder 41 to extend so that the probe 447 descends to a height of h1. Power on the tester 55 to test the contact impedance of the upper part of the contact part. At the same time, the pressure module obtains the pressure value detected by the first pressure sensor 442, and the pressure value detected by the first pressure sensor 442 is recorded as f'. Then, according to the actual length of the contact part or actual needs, different methods can be selected for contact impedance detection.

[0067] Method 1: Then control the driving cylinder 41 to contract, and then control the driving cylinder 41 to extend so that the probe 447 descends to a height of h2. Power on the tester 55 to test the contact impedance of the middle part of the contact part. Then control the driving cylinder 41 to contract; then control the driving cylinder 41 to extend so that the probe 447 descends to a height of h3. Power on the tester 55 to test the contact impedance of the lower part of the contact part. Finally, control the driving cylinder 41 to contract, thereby obtaining the actual impedances of the upper, middle, and lower parts of the contact part;

[0068] Method 2: Then control the lifting seat 42 to continue to extend so that the detection head 44 descends to a height of h2. Power on the tester 55 to test the contact impedance of the middle part of the contact part; then control the lifting seat 42 to continue to extend so that the probe 447 descends to a height of h3. Power on the tester 55 to test the contact impedance of the lower part of the contact part;

[0069] Finally, control the driving cylinder 41 to contract, and at the same time, the pressure module obtains the pressure value detected by the second pressure sensor 446, and the pressure value detected by the second pressure sensor 446 is F'. Thereby obtaining the actual impedances of the upper, middle, and lower parts of the contact part and the insertion and extraction force of the contact part.

[0070] Step 3-1: Contact impedance test;

[0071] When R 上 、R 中 、R 下 are all ≤ R, the contact impedance test meets the requirements; in other cases, the contact impedance test does not meet the requirements.

[0072] Step 3-2: Insertion and extraction force test;

[0073] When nf ≤ f' ≤ f and nF ≤ F' ≤ F, the insertion and extraction force test meets the requirements; in other cases, the insertion and extraction force test of this contact part does not meet the requirements, and there is a situation of being too tight or too loose during insertion and extraction.

[0074] Step Three - Three: Judgment of Overall Test Results

[0075] When the contact impedance tests and insertion and extraction force tests of all contact components on the same contactor meet the requirements, this contact component can proceed with subsequent expansion tests;

[0076] When, on the same contactor, the contact impedance tests of more than one - third of the contact components do not meet the requirements, and the insertion and extraction force tests of more than one - third of the contact components do not meet the requirements, it means that both the contact impedance test and the insertion and extraction force test of this connector do not meet the requirements, and this connector is judged as a defective product;

[0077] In other cases, this connector needs to undergo subsequent supplementary tests to avoid mis - testing and reducing the qualification rate of the connector.

[0078] It should be noted that since a distance sensor is provided inside the hollow of the cylinder body 441, the second 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 extends to drive the probe 447 to descend until the probe 447 is inserted around the contact component, if the measured distance by the distance sensor decreases, it means there is resistance between the probe 447 and the contact component. 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 distance, and the compensation height is also the length of the continued extension of the driving cylinder 41; before continuing to extend the driving cylinder 41 to compensate for the height required for the contact impedance test, the resistance between the probe 447 and the contact component can also be judged by the amount of decrease in the distance measured by the distance sensor. A large decrease in distance means a large resistance and a large insertion and extraction force, and a small decrease in distance means a small resistance and a small insertion and extraction force, thereby assisting in the judgment during the insertion and extraction force test in Step Three - Two; similarly, during subsequent continued extension, the actual descent height of the probe 447 can also be adjusted to the set value according to this method.

[0079] Step Four: Supplementary Tests, Repeating the Contact Impedance Tests and Insertion and Extraction Force Tests by Adjusting Different Angles

[0080] Specifically, control the single - axis moving seat one 32 to start, drive the transmission gear 37 to drive the fixture one 34 and the connector clamped and fixed on the fixture one 34 to rotate by a set angle. The specific angle needs to be set manually. Repeat Step Three. If it is judged to meet the requirements after repetition, proceed with subsequent expansion tests. If the original result remains after repetition, the impedance module judges it as a defective product.

[0081] Step Five: Expansion Tests, Simulating the Contact Impedance Tests and Insertion and Extraction Force Tests after Environmental Abrupt Changes

[0082] Specifically, the manipulator moves the connector that meets the requirements of contact impedance test and insertion and extraction force test to the second fixture 36. The single-axis moving seat 32 drives the second fixture 36 and the connector on the second fixture 36 into the interior of the box body 61, so that the connecting frame 35 is located at the end of the single-axis moving seat 32 away from the double-axis moving frame 31. Then, according to actual needs, the temperature control device and humidity adjustment device in the mixing box 65 are started through the humidity control end 53 and temperature control end 54 to adjust the temperature and humidity of the gas in the mixing box 65. After that, the air pump 66 is started to introduce the adjusted gas to the contact parts of the connector in the box body 61 to simulate sudden environmental changes, and the duration needs to be set manually. Then, the single-axis moving seat 32 drives the second fixture 36 and the connector on the second fixture 36 out of the box body 61, and the manipulator moves the connector back to the first fixture 34 to repeat step three. If the requirements are still not met, the connector is judged as a qualified product, and in other cases, it is judged as an extended unqualified product, so as to obtain the impedance change and insertion and extraction force change of the connector after suddenly being affected by environmental factors, thus enriching the detection items of the automatic detection device and the accuracy of the detection results.

[0083] Step six: According to the obtained judgment result of the connector, control the manipulator to move the connector to the corresponding recycling box.

[0084] Through the above steps, it is possible to synchronously perform insertion and extraction force detection and impedance detection and insertion and extraction force detection after sudden environmental changes during the contact impedance detection of the connector, enrich the detection items of the automatic detection device and the accuracy of the detection results, reduce the detection steps, and improve the detection effect.

[0085] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0086] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used 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 recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic detection device for the contact impedance of a connector, comprising a base (1), a drive box (2), a detection frame (3), a detection mechanism (4), an operation component (5), a temperature control box (6) and a connector, characterized in that, The driving 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 driving box (2). The detection mechanism (4) and the operation component (5) are arranged on the side of the driving box (2) close to the detection frame (3). The position of the detection mechanism (4) corresponds to that of the detection frame (3). The temperature control box (6) is arranged inside the driving box (2), and the position of the temperature control box (6) corresponds to that of the detection frame (3). The connector includes a housing and a plurality of contact parts arranged inside the housing; The detection mechanism (4) includes a driving cylinder (41), a detection head (44) and a camera (45). The camera (45) is electrically connected to a vision module. The vision module is used to identify the shape and position of the contact parts of the connector and judge whether the shape and position of the contact parts of the connector are normal; The driving cylinder (41) is fixed to the 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), and the bottom of the lifting seat (42) is connected to a connecting seat (43); The detection head (44) includes a cylinder body (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 the pressure data during plugging and unplugging before and after impedance detection and judge the plugging force; The cylinder body (441) is fixed to the center of the bottom of the connecting seat (43). The cylinder body (441) is of a hollow structure. The first pressure sensor (442) and the second pressure sensor (446) are arranged in the hollow part inside the cylinder body (441). The first pressure sensor (442) is fixed to the top inside the cylinder body (441), and the second pressure sensor (446) is fixed to the bottom inside the cylinder body (441); A first spring (443) and a second spring (445) are arranged inside the cylinder body (441). The first spring (443) is fixed to the bottom of the first pressure sensor (442), and the second spring (445) is fixed to the top of the second pressure sensor (446). Both ends of the first spring (443) and the second pressure sensor (446) are fixedly connected to a bottom plate, and the bottom plates are both circular rings; A sliding column (444) is slidably connected inside the cylinder body (441). A limiting block is fixedly connected inside the cylinder body (441). A sliding groove is arranged at the corresponding position of the sliding column (444). The second spring (445) and the second pressure sensor (446) are both arranged outside the sliding column (444). Two groups of probes (447) are fixedly connected to the bottom of the sliding column (444). A bending part is arranged at the bottom of the probes (447), and current and voltage contacts are arranged on the probes (447); The operation component (5) includes a 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 parts and judge whether the impedance meets the requirements.

2. The automatic connector contact impedance detection device according to claim 1, characterized in that, The detection rack (3) includes a biaxial moving rack (31) and a uniaxial moving seat one (32). The biaxial moving rack (31) is fixed to the top of the base (1). The biaxial moving rack (31) is located below the detection mechanism (4). A limiting groove is provided at the top of the biaxial moving rack (31). A driving part (33) is provided at the edge of the limiting groove at the top of the biaxial moving rack (31). The driving part (33) is a motor-driven gear rotation structure. The output end of the driving part (33) is meshed and connected with a transmission gear (37). The transmission gear (37) is located in the limiting groove and is connected to the biaxial moving rack (31) by bearings. A fixture one (34) is fixedly connected to the top of the transmission gear (37).

3. The automatic connector contact impedance detection device according to claim 2, characterized in that, The uniaxial moving seat one (32) is fixed to the top of the base (1) corresponding to the position of the biaxial moving rack (31). The uniaxial moving seat one (32) is located inside the driving box (2). A connecting frame (35) is slidably connected to the top of the uniaxial moving seat one (32). A fixture two (36) is provided at the top of the connecting frame (35).

4. The automatic connector contact impedance detection device according to claim 3, characterized in that, 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 one side of the connecting seat (43) close to the biaxial moving rack (31).

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

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

7. The automatic connector contact impedance detection device according to claim 6, characterized in that The temperature control box (6) includes a box body (61). An air inlet (62) is provided at the top of the box body (61). The air inlet (62) corresponds to the position at the center of the second fixture (36) when the connecting frame (35) is located on the first single-axis moving seat (32) and away from the end of the first single-axis moving seat (32). A ventilation opening (63) is provided on one side of the box body (61) away from the double-axis moving frame (31). An air inlet pipe (64) is connected to the air inlet (62) through a pipeline. A mixing box (65) and an air pump (66) are provided on the air inlet pipe (64). A temperature control device and a humidity adjustment device are provided inside the mixing box (65). A ventilation pipe (67) is connected to the ventilation opening (63) through a pipeline. A ventilation fan (68) is provided on the ventilation pipe (67). The temperature control device is in signal connection with the temperature control terminal (54), and the humidity adjustment device is in signal connection with the humidity control terminal (53); An electric door (69) is provided on one side of the box body (61) close to the double-axis moving frame (31).

8. A detection method for an automatic detection device of a connector contact impedance, which is implemented based on an automatic detection device of a connector contact impedance described in claim 7, is characterized in that, The detection method of the connector contact impedance automatic detection device is as follows: Step 1: Install the connector to be detected and conduct an appearance inspection; Step 2: In the impedance module, preset the descent height of three types of probes (447), the first pressure threshold, the second pressure threshold, the impedance threshold, and the pressure threshold coefficient; Step 3: The double-axis moving frame (31) drives the clamped and fixed connector to run according to a set trajectory, and the detection mechanism (4) conducts a contact impedance test and an insertion and extraction force test on the connector to be detected; Step 4: Supplementary test, adjust different angles and repeat the contact impedance test and the insertion and extraction force test; Step 5: Extended test, simulate the contact impedance test and the insertion and extraction force test after the environmental mutation; Step 6: According to the obtained connector judgment result, control the manipulator to move the connector to the corresponding recycling box.

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