Visual PIN detection equipment

Abstract

A visual PIN detection device disclosed by the present invention comprises a testboard, a clamp seat arranged on the testboard and a CCD assembly arranged above the clamp seat, the CCD assembly comprises a coaxial light source, a telecentric lens and a CCD camera which are sequentially arranged away from the clamp seat in the vertical direction, and the CCD camera, the telecentric lens and the coaxial light source are located on the same axis. The test bench is provided with a light shield for covering the rear surface and two side surfaces of the test bench, the test bench is provided with a connection interface, the clamp seat comprises a base and a positioning clamp detachably arranged on the base, the positioning clamp is used for positioning and installing a detected part, the test bench is provided with a support plate for supporting the base, and the support plate is provided with a clamping groove. Sensors are arranged on the supporting plate and located on the two sides of the positioning clamp. The PIN detection device is reasonable in structural design, through visual configuration of the CCD camera, the telecentric lens and the coaxial light source, the PIN can be detected, and the problem that the PIN is prone to abrasion in other existing detection modes is thoroughly solved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and more particularly to a visual PIN needle detection device. Background Art

[0002] In recent years, people have increasingly demanded more quality and functionality from their vehicles. Continuous innovation in automotive technology is also increasingly meeting people's demands for personalized and safe functions. This has led to an increase in controller functions within automotive control units, meaning an increase in the number of external controller connectors. The presence of multiple connectors on the same controller has led to an increase in connector PIN testing for the product. A PIN is a metal material used in connectors to transmit electrical signals. To ensure reliable connection between the PIN inside the connector and the external connector, each PIN in the connector must be within the required parameter range, placing high demands on connector PIN testing.

[0003] There are two basic methods for PIN detection. One is to use a copper block that mimics the shape of the switch socket and creates a certain gap at the corresponding PIN position to allow the original PIN to pass smoothly. However, this method can easily damage the original component and cause wear on the PIN surface, shortening the product lifespan. The other method is to use a special PIN needle detection device. The device has a fixed block specially customized for different parts to be tested, which plays the role of limiting / anti-error / positioning. The fixed block has a PIN needle limiting copper block embedded in it. The part to be tested can be connected by pressing down the movable plate. If it fails, it means that there is a problem with the PIN needle. Compared with the previous solution, this solution greatly reduces the loss of products during the detection process. The limit block can also protect the manual inspection to a certain extent, and human errors will not cause the PIN needle to be skewed. However, the method of detecting the PIN needle during contact will still cause wear on the surface of the PIN needle, affecting the service life of the product. Summary of the Invention

[0004] The present invention overcomes the shortcomings of the existing technology and provides a visual PIN needle detection device with a reasonable structural design. It uses visual detection to take pictures of PIN needles in a contactless manner, and detects whether the PIN needle is qualified through the main software algorithm, thereby avoiding the risk of PIN needle wear.

[0005] To achieve the above object, the present invention provides the following technical solutions: A visual PIN needle detection device includes a test bench, a fixture seat arranged on the test bench, and a CCD assembly arranged above the fixture seat. The CCD assembly includes a coaxial light source, a telecentric lens, and a CCD camera arranged in sequence in a vertical direction away from the fixture seat. The CCD camera, telecentric lens, and coaxial light source are on the same axis. The test bench is provided with a light shield covering the back and two sides of the test bench, and the test bench is provided with a connection interface.

[0006] By adopting the above technical solution, by using a visual configuration solution of a CCD camera, a telecentric lens and a coaxial light source on the same axis for the CCD component, the shape / size / spacing / quantity and other information of the PIN needles of the inspected component located on the fixture seat can be clearly photographed within the field of view, and the visual algorithm is used to compare and verify whether the photographed PIN needles meet the inspection standards. The connection interface can be connected to the host to enable the visual algorithm to compare the photographed PIN needles, and the connection interface can be set to multiple and different interfaces, which is convenient for later expansion of functions and software adaptation. The setting of the light hood can reduce the influence of ambient light on the inspection results, while preventing the accuracy of the inspection from being affected by the misoperation of adjusting parameters such as the lens aperture and focal length.

[0007] Preferably, the fixture seat includes a base and a positioning fixture detachably provided on the base, and the positioning fixture is used for positioning and installing the component to be inspected.

[0008] By adopting the above technical solution, by setting the fixture seat as a base and a detachable positioning fixture, when replacing the component to be inspected, it is only necessary to replace the positioning fixture corresponding to the component to be inspected and switch the program algorithm, wherein the positioning fixture and the base can be connected by fasteners, such as detachable and replaceable screws or pins.

[0009] Preferably, the test bench is provided with a support plate for supporting the base, and sensors are provided on both sides of the positioning fixture on the support plate.

[0010] By adopting the above technical solution, the support plate can well support the support base, so that the positioning fixture has positioning stability, and the setting of the sensor is used to detect whether the detected component is located in the positioning fixture.

[0011] Preferably, a fixing frame is provided on the support plate behind the positioning fixture, and a strip hole is provided on the fixing frame along the vertical direction. A limiting cylinder is detachably fixed in the strip hole by a fastener, and when the limiting cylinder is extended, the detected component is limited to the positioning fixture.

[0012] By adopting the above technical solution, the setting of the limit cylinder, when the inspected component fails the inspection, the limit cylinder will extend and be located above the inspected component, so that the inspected component cannot be removed from the positioning fixture, preventing the operator from taking away the unqualified inspected component. The setting of the fixing frame, the fixing frame is provided with a strip hole, and the limit cylinder can be adjusted up and down in the strip hole to adjust to a position suitable for limiting different inspected components.

[0013] Preferably, a start button and an unlocking and locking knob are provided on the test bench. The start button is used to control the operation of the CCD component, and the unlocking and locking knob is used to control the extension and retraction of the limit cylinder.

[0014] By adopting the above technical solution, the configuration is such that it is convenient for the operator to operate. Specifically, the start button and the unlocking and locking knobs are arranged on the front of the test bench, and the operator operates on the front.

[0015] Preferably, a mounting frame is provided on the test bench, and support blocks, support ring blocks and support frames are respectively provided on the mounting frame at positions corresponding to the CCD camera, telecentric lens and coaxial light source. The CCD camera is fixedly mounted on the support block, the telecentric lens is fixedly mounted on the support ring block, the coaxial light source is fixedly mounted on the support frame, and the support plate is fixedly mounted on the mounting frame and is located below the support frame.

[0016] By adopting the above technical solution, the CCD camera, telecentric lens and coaxial light source can be well fixed and supported, and the support plate can be fixedly installed on the bottom of the mounting frame. In this way, during the specific assembly, after the corresponding positions of the mounting frame, fixture seat and CCD component are installed, the mounting frame is fixed to the test bench, which can improve the assembly accuracy and assembly efficiency.

[0017] Preferably, a visual window is provided behind the light shield at positions corresponding to the CCD camera, the telecentric lens and the coaxial light source.

[0018] By adopting the above technical solution and setting the visual window, the current light source brightness and verticality can be directly observed from the back of the test bench, making it convenient to adjust the values ​​at any time.

[0019] Preferably, the apparatus further comprises a mobile stand for supporting the test bench, and the bottom of the mobile stand is provided with universal wheels and supporting feet.

[0020] By adopting the above technical solution and setting up the mobile test stand, the overall position movement and fixation of the test bench are facilitated, and the functional expansion of the test bench is easily achieved.

[0021] Preferably, a host is provided on the mobile stand, a wire groove is provided on one side of the mobile stand located at the host, and the host and the connection interface are connected via a wire harness.

[0022] By adopting the above technical solution, the host can be connected to the test bench through the wiring harness, thereby providing the visual software algorithm, and the setting of the wire trough facilitates the arrangement of the connecting wire harness and reduces the entanglement of the wire harness.

[0023] Preferably, a pressure gauge is provided on the mobile platform and / or the test platform, a light source is provided on the mobile platform located above the test platform, and a barcode scanner is also provided on the mobile platform.

[0024] By adopting the above technical solution, the pressure gauge can inflate the limit cylinder, so that the limit cylinder is in good working condition, the light source can provide lighting for the entire test bench, and the barcode scanner can scan and bind the QR code of the inspected component for easy traceability later.

[0025] Beneficial effects of the present invention: The present invention has a reasonable structural design and can detect PIN needles through the visual configuration of CCD camera + telecentric lens + coaxial light source, which completely solves the problem that PIN needles are easily worn in other existing detection methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic structural diagram of a specific embodiment of the present invention reflecting that a test bench is located on a mobile stand; Figure 2 This is a schematic diagram of the structure of the test bench and light shield according to a specific embodiment of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the structure of the test bench and light shield according to a specific embodiment of the present invention. Figure 2 ; Figure 4 This is a schematic diagram of the structure of a test bench according to a specific embodiment of the present invention; Figure 5 This is a structural diagram of a fixture base according to a specific embodiment of the present invention; Figure 6 It is a structural schematic diagram reflecting a limit cylinder according to a specific embodiment of the present invention.

[0027] In the figure: a. Component to be tested; 1. Test bench; 11. Connection interface; 12. Start button; 13. Unlock and lock knob; 14. Unlock button; 2. Fixture base; 21. Base; 22. Positioning fixture; 23. Support plate; 24. Sensor; 25. Fixture; 26. Bar hole; 27. Fastener; 28. Limit cylinder; 3. CCD assembly; 31. Coaxial light source; 32. Telecentric lens; 33. CCD camera; 4. Light hood; 41. Visual window; 5. Mounting bracket; 51. Support block; 52. Support ring block; 53. Support bracket; 6. Mobile stand; 61. Universal wheel; 62. Support foot; 63. Main unit; 64. Wire duct; 65. Pressure gauge; 66. Light source; 67. Barcode scanner. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making creative efforts are within the scope of protection of the present invention.

[0029] like Figure 1-6As shown, a visual PIN needle detection device includes a test table 1, a fixture base 2 arranged on the test table 1, and a CCD assembly 3 arranged above the fixture base 2. The CCD assembly 3 includes a coaxial light source 31, a telecentric lens 32 and a CCD camera 33 arranged in sequence in a vertical direction away from the fixture base 2. The CCD camera 33, the telecentric lens 32 and the coaxial light source 31 are on the same axis. The test table 1 is provided with a light shield 4 that covers the back and two sides of the test table 1. The test table 1 is provided with a connection interface 11; the fixture base 2 includes a base 21 and a detachable base 21. A positioning fixture 22 is used to position and install the component a to be tested; a support plate 23 for supporting the base 21 is provided on the test bench 1, and sensors 24 are provided on both sides of the positioning fixture 22 on the support plate 23; a fixing frame 25 is provided on the support plate 23 behind the positioning fixture 22, and a strip hole 26 is provided on the fixing frame 25 along the vertical direction. A limit cylinder 28 is detachably fixed and installed in the strip hole 26 through a fastener 27. When the limit cylinder 28 is extended, the component a to be tested is limited to the positioning fixture 22; a start button 12 and an unlocking and locking knob 13 are provided on the test bench 1 , the start button 12 is used to control the operation of the CCD component 3, and the unlocking and locking knob 13 is used to control the extension and retraction of the limit cylinder 28; a mounting frame 5 is provided on the test bench 1, and a support block 51, a support ring block 52 and a support frame 53 are respectively provided on the mounting frame 5 corresponding to the positions of the CCD camera 33, the telecentric lens 32 and the coaxial light source 31. The CCD camera 33 is fixedly mounted on the support block 51, the telecentric lens 32 is fixedly mounted on the support ring block 52, the coaxial light source 31 is fixedly mounted on the support frame 53, and the support plate 23 is fixedly mounted on the mounting frame 5 and is located below the support frame 53; a light shield 4 is provided with a visual window 41 at the rear side corresponding to the position of the CCD camera 33, the telecentric lens 32 and the coaxial light source 31; it also includes a mobile stand 6 for supporting the test bench 1, and the bottom of the mobile stand 6 is provided with a universal wheel 61 and a support foot 62; a host 63 is provided on the mobile stand 6, and a wire groove 64 is provided on one side of the mobile stand 6 located on the host 63, and the host 63 and the connection interface 11 are connected by a wire harness; a barometer 65 is provided on the mobile stand 6 and or the test bench 1, and an illumination light source 66 is provided on the mobile stand 6 located above the test bench 1, and a barcode scanner 67 is also provided on the mobile stand 6.

[0030] In the present invention, the test bench 1 can be fixed on a mobile stand 6 to facilitate the change of position of the test bench 1 and the expansion of other auxiliary functions. Specifically, the wiring harness is connected to the connection interface 11 of the test bench 1 and the host 63. The host 63 provides a software algorithm for the test bench 1. The algorithm compares the CCD component 3 with the PIN pin image for comparison. The CCD component 3 can capture the shape / size / spacing / number of the PIN pins within the field of view, and then uses a visual algorithm to compare and verify whether the photographed PIN pins meet the inspection standards. The visual algorithm is an existing mature technology and will not be described in detail here.

[0031] The CCD assembly 3 of the present invention utilizes a camera + telecentric lens 32 + coaxial light source 31 visual configuration. The telecentric lens 32 addresses edge distortion, while the coaxial light source 31 eliminates metal reflection interference, resulting in clear imaging of the edges and ends of the PIN pins. Furthermore, this visual configuration maintains a constant image size regardless of the pin's height, avoiding the error caused by conventional lenses that typically produce larger images at close range and smaller images at far distances. Furthermore, edge distortion is eliminated, ensuring accurate measurement of parameters such as the pin's spacing and width. Furthermore, the coaxial light source 31 enhances the pin's outline, reducing reflection interference.

[0032] In practice, the optical system should be constructed with a magnification ratio (e.g., 0.5X-2X) tailored to the pin size to ensure that all pins are covered. In addition to using a coaxial light source 31, backlighting or low-angle ringlighting can also be employed. Backlighting is used for contour detection (measuring pin position and spacing), while low-angle ringlighting is used for surface defect detection (such as scratches and oxidation).

[0033] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A visual PIN needle detection device, comprising a test bench (1), a fixture seat (2) arranged on the test bench (1), and a CCD component (3) arranged above the fixture seat (2), characterized in that: The CCD assembly (3) comprises a coaxial light source (31), a telecentric lens (32) and a CCD camera (33) which are arranged in sequence in a vertical direction away from the fixture seat (2); the CCD camera (33), the telecentric lens (32) and the coaxial light source (31) are located on the same axis; a light shield (4) is provided on the test bench (1) to cover the back and two side surfaces of the test bench (1); and a connection interface (11) is provided on the test bench (1).

2. A visual PIN needle detection device according to claim 1, characterized in that: The fixture seat (2) comprises a base (21) and a positioning fixture (22) detachably arranged on the base (21), wherein the positioning fixture (22) is used for positioning and installing the detected component (a).

3. A visual PIN needle detection device according to claim 2, characterized in that: A support plate (23) for supporting the base (21) is provided on the test bench (1), and sensors (24) are provided on both sides of the positioning fixture (22) on the support plate (23).

4. A visual PIN needle detection device according to claim 3, characterized in that: A fixing frame (25) is provided on the support plate (23) at the rear of the positioning fixture (22). A strip hole (26) is provided on the fixing frame (25) in a vertical direction. A limiting cylinder (28) is detachably fixedly installed in the strip hole (26) via a fastener (27). When the limiting cylinder (28) is extended, the detected component (a) is limited to the positioning fixture (22).

5. A visual PIN needle detection device according to claim 4, characterized in that: The test bench (1) is provided with a start button (12) and an unlocking and locking knob (13). The start button (12) is used to control the operation of the CCD component (3), and the unlocking and locking knob (13) is used to control the extension and retraction of the limit cylinder (28).

6. A visual PIN needle detection device according to claim 3, characterized in that: A mounting frame (5) is provided on the test bench (1); a support block (51), a support ring block (52) and a support frame (53) are respectively provided on the mounting frame (5) at positions corresponding to the CCD camera (33), the telecentric lens (32) and the coaxial light source (31); the CCD camera (33) is fixedly mounted on the support block (51); the telecentric lens (32) is fixedly mounted on the support ring block (52); the coaxial light source (31) is fixedly mounted on the support frame (53); and the support plate (23) is fixedly mounted on the mounting frame (5) and is located below the support frame (53).

7. A visual PIN needle detection device according to claim 6, characterized in that: A visual window (41) is provided at the rear of the light shield (4) at positions corresponding to the CCD camera (33), the telecentric lens (32) and the coaxial light source (31).

8. A visual PIN needle detection device according to claim 1, characterized in that: It also includes a mobile stand (6) for supporting the test bench (1), and the bottom of the mobile stand (6) is provided with universal wheels (61) and supporting feet (62).

9. A visual PIN needle detection device according to claim 8, characterized in that: A host (63) is provided on the mobile platform (6), a wire groove (64) is provided on one side of the mobile platform (6) located on the host (63), and the host (63) and the connection interface (11) are connected via a wire harness.

10. A visual PIN needle detection device according to claim 9, characterized in that: A barometer (65) is provided on the mobile platform (6) and / or the test platform (1); an irradiation light source (66) is provided above the mobile platform (6) located above the test platform (1); and a code scanning gun (67) is also provided on the mobile platform (6).

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