Visual pin detection device
By employing a vision configuration scheme combining a CCD camera, a telecentric lens, and a coaxial light source, along with vision algorithms and a limit cylinder, the problems of wear and error in PIN pin detection have been solved, achieving non-destructive testing and high-precision PIN pin detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WENZHOU CHANGJIANG AUTOMOBILE ELECTRONICS SYST
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-23
AI Technical Summary
Existing PIN detection methods are prone to PIN wear, affecting product lifespan, and are also susceptible to detection errors and human error.
The system employs a vision configuration scheme that combines a CCD camera, a telecentric lens, and a coaxial light source. It captures images of the PIN pins non-contactly, and uses visual algorithms to detect whether the PIN pins are qualified, thus avoiding PIN pin wear. It also uses a limit cylinder to prevent defective products from being removed.
It enables non-destructive testing of PIN pins, improves testing precision and accuracy, reduces the risk of PIN pin wear, and lowers the possibility of human error.
Smart Images
Figure CN224398583U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of detection equipment technology, and more specifically, to a visual PIN pin detection device. Background Technology
[0002] In recent years, people have increasingly higher demands for the quality and functionality of automobiles. The continuous innovation of automotive technology has also better met people's needs for personalized and safe functions. This has led to an increase in the functions of the controller in the automotive control unit, namely, an increase in the number of external connectors of the controller. The existence of multiple connectors in the same controller means an increase in the detection of connector pins. A pin is a metal material in a connector used to complete the transmission of electrical signals. To ensure that the pins inside the connector are reliably connected to the external connector, it is necessary to ensure that each pin in the connector is within the required parameter range. This places high demands on the detection of pins in the connector.
[0003] There are two main types of existing PIN detection methods: one is to use a copper block to mimic the shape of the switch connector and make a certain gap at the position of the copper block corresponding to the PIN, so that the PIN can pass through smoothly. However, this method is prone to damaging the component and will also cause wear on the surface of the PIN, affecting the product's lifespan.
[0004] Another method involves using specialized PIN testing equipment. This equipment has a fixed block specifically designed for different components being tested, serving to limit, prevent errors, and position the pins. The fixed block contains a PIN pin limiting copper block. By pressing down on the movable plate, the component being tested can be connected. If the connection fails, it indicates a problem with the PIN pin. Compared to the previous method, this solution significantly reduces product wear during the testing process. The limiting block can also protect the PIN pins from misalignment due to human error during manual testing. However, the contact-based PIN testing method still causes wear on the PIN pin surface, affecting the product's lifespan. Utility Model Content
[0005] This invention overcomes the shortcomings of the prior art and provides a visual PIN inspection device with a reasonable structural design. It captures PIN images non-contactly through visual inspection and uses the main body's software algorithm to detect whether the PIN is qualified, thereby avoiding the risk of PIN wear.
[0006] To achieve the above objectives, the present invention provides the following technical solution:
[0007] A visual PIN needle detection device includes a test stage, a fixture on the test stage, and a CCD component above the fixture. The CCD component includes a coaxial light source, a telecentric lens, and a CCD camera arranged sequentially in a vertical direction away from the fixture. The CCD camera, the telecentric lens, and the coaxial light source are on the same axis. A light shield covering the back and two sides of the test stage is provided on the test stage, and a connection interface is provided on the test stage.
[0008] By adopting the above technical solution, and using a visual configuration scheme with a CCD camera, telecentric lens, and coaxial light source on the same axis, the shape, size, spacing, and quantity of the PIN pins of the component being inspected on the fixture can be clearly captured within the field of view. The captured PIN pins are then compared and verified using a visual algorithm to determine if they meet the inspection standards. The connection interface allows for connection to the host computer, enabling the visual algorithm to compare the captured PIN pins. Multiple different connection interfaces can be configured, facilitating future expansion of functions and software adaptation. The light shield reduces the impact of ambient light on the inspection results while preventing accidental adjustments to lens aperture and focal length, which could affect the accuracy of the inspection.
[0009] Preferably, the fixture base includes a base and a positioning fixture detachably disposed on the base, the positioning fixture being used for positioning and mounting the component to be tested.
[0010] By adopting the above technical solution, and by setting the fixture base as a base and a detachable positioning fixture, when changing the part being tested, it is only necessary to replace the positioning fixture that is compatible with the part being tested and switch the program algorithm. The positioning fixture and the base can be connected by fasteners, such as detachable and replaceable screws or pins.
[0011] 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.
[0012] By adopting the above technical solution, the support plate can provide good support for the support base, so that the positioning fixture has positioning stability, while the sensor is used to detect whether the detected part is located in the positioning fixture.
[0013] Preferably, a fixing frame is provided on the support plate behind the positioning fixture. The fixing frame has a strip-shaped hole along the vertical direction. A limit cylinder is detachably fixed in the strip-shaped hole by fasteners. When the limit cylinder extends, the part to be tested is limited to the positioning fixture.
[0014] By adopting the above technical solution, the limit cylinder is designed so that when the tested component fails the test, the limit cylinder will extend and be positioned above the tested component, preventing the tested component from being removed from the positioning fixture and preventing the operator from taking away the unqualified tested component. As for the fixed frame, the fixed frame is provided with a strip hole, and the limit cylinder can be adjusted up and down in the strip hole to be adjusted to a position that can limit different tested components.
[0015] Preferably, the test bench is equipped with a start button and an unlock / lock knob. The start button is used to control the operation of the CCD component, and the unlock / lock knob is used to control the extension and retraction of the limit cylinder.
[0016] By adopting the above technical solution, this setup facilitates operation for the operator. Specifically, the start button and unlock / lock knob are located on the front of the test bench, allowing the operator to operate from the front.
[0017] Preferably, the test stand is provided with a mounting frame, on which a support block, a support ring block, and a support frame are respectively provided at the positions of the CCD camera, the telecentric lens, and the 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 located below the support frame.
[0018] By adopting the above technical solution, the CCD camera, telecentric lens, and coaxial light source can be well fixed and supported. The support plate is fixedly installed on the bottom of the mounting frame. In this way, during the actual assembly, after the corresponding positions of the mounting frame, fixture base, and CCD components are installed, the mounting frame is fixed on the test table, which can improve the assembly accuracy and assembly efficiency.
[0019] Preferably, a viewing window is provided behind the light shield corresponding to the positions of the CCD camera, the telecentric lens, and the coaxial light source.
[0020] By adopting the above technical solution, the setting of the viewing window allows for direct observation of the current light source brightness and verticality from behind the test platform, facilitating the adjustment of values at any time.
[0021] Preferably, it also includes a movable frame for supporting the test bench, the bottom of which is provided with casters and support feet.
[0022] By adopting the above technical solution, the mobile test stand facilitates the overall movement and fixation of the test stand, and makes it easy to expand the functionality of the test stand.
[0023] Preferably, a main unit is mounted on a mobile platform, and a cable tray is provided on one side of the mobile platform located on the main unit. The main unit and the connection interface are connected by a cable harness.
[0024] By adopting the above technical solution, the host can be connected to the test bench via a wire harness, thereby providing vision software algorithms. The wire channel design facilitates the organization of the wire harness and reduces wire tangling.
[0025] Preferably, a pressure gauge is installed on the mobile stand and / or the test stand, an illumination light source is installed on the mobile stand above the test stand, and a barcode scanner is also installed on the mobile stand.
[0026] By adopting the above technical solution, the pressure gauge can inflate the limit cylinder, ensuring that the limit cylinder is in good working condition; the illumination light source can provide illumination for the entire test bench; and the barcode scanner can scan and bind the QR code of the tested component, facilitating later traceability.
[0027] The beneficial effects of this utility model are:
[0028] This utility model has a reasonable structural design. Through the visual configuration of CCD camera + telecentric lens + coaxial light source, it can detect PIN pins and completely solve the problem of easy wear of PIN pins in other existing detection methods. Attached Figure Description
[0029] Figure 1 This is a schematic diagram illustrating the structure of the test bench located on the movable frame, according to a specific embodiment of the present invention.
[0030] Figure 2 This is a schematic diagram illustrating the structure of the test platform and the light shield in a specific embodiment of this utility model. Figure 1 ;
[0031] Figure 3 This is a schematic diagram illustrating the structure of the test platform and the light shield in a specific embodiment of this utility model. Figure 2 ;
[0032] Figure 4 This is a schematic diagram illustrating the structure of the test bench according to a specific embodiment of the present invention;
[0033] Figure 5 This is a schematic diagram illustrating the structure of the fixture base according to a specific embodiment of the present invention;
[0034] Figure 6 This is a schematic diagram illustrating the structure of the limiting cylinder in a specific embodiment of this utility model.
[0035] In the diagram: a) Component under test; 1) Test bench; 11) Connection interface; 12) Start button; 13) Unlock / lock knob; 14) Unlock button; 2) Fixture base; 21) Base; 22) Positioning fixture; 23) Support plate; 24) Sensor; 25) Fixture; 26) Strip hole; 27) Fastener; 28) Limit cylinder; 3) CCD assembly; 31) Coaxial light source; 32) Telecentric lens; 33) CCD camera; 4) Light shield; 41) Viewing window; 5) Mounting bracket; 51) Support block; 52) Support ring block; 53) Support frame; 6) Moving platform; 61) Casters; 62) Support feet; 63) Main unit; 64) Cable tray; 65) Pressure gauge; 66) Irradiation light source; 67) Barcode scanner. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0037] like Figure 1-6As shown, a visual PIN needle detection device includes a test platform 1, a fixture 2 mounted on the test platform 1, and a CCD assembly 3 mounted above the fixture 2. The CCD assembly 3 includes a coaxial light source 31, a telecentric lens 32, and a CCD camera 33 arranged sequentially in a vertical direction away from the fixture 2. The CCD camera 33, the telecentric lens 32, and the coaxial light source 31 are on the same axis. A light shield 4 covering the back and two sides of the test platform 1 is provided on the test platform 1, and a connection interface 11 is provided on the test platform 1. The fixture 2 includes a base 21 and a component detachably mounted on the base 21. A positioning fixture 22 is used to position and install the component to be tested, a. A support plate 23 for supporting the base 21 is provided on the test bench 1. Sensors 24 are mounted 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. A slotted hole 26 is provided on the fixing frame 25 along the vertical direction. A limit cylinder 28 is detachably fixed in the slotted hole 26 by fasteners 27. When the limit cylinder 28 extends, it limits the component to be tested, a, to the positioning fixture 22. A start button 12 and an unlock / lock 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 unlock / lock knob 13 is used to control the extension and retraction of the limit cylinder 28. A mounting bracket 5 is provided on the test bench 1. Support blocks 51, support ring blocks 52, and support frames 53 are respectively provided on the mounting bracket 5 at the 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 bracket 5 and located below the support frame 53. A light shield is also provided. A viewing window 41 is provided behind the CCD camera 33, the telecentric lens 32 and the coaxial light source 31; it also includes a movable platform 6 for supporting the test platform 1, with casters 61 and support feet 62 at the bottom of the movable platform 6; a main unit 63 is provided on the movable platform 6, and a wire groove 64 is provided on one side of the main unit 63 on the movable platform 6, and the main unit 63 and the connection interface 11 are connected by a wire harness; a pressure gauge 65 is provided on the movable platform 6 and / or the test platform 1, an illumination light source 66 is provided on the movable platform 6 above the test platform 1, and a barcode scanner 67 is also provided on the movable platform 6.
[0038] In this invention, the test platform 1 can be fixed on the movable platform 6, facilitating position changes and the expansion of other auxiliary functions. Specifically, the wiring harness connects the connection interface 11 of the test platform 1 to the host 63. The host 63 provides software algorithms for the test platform 1, which compare the images of the PIN pins captured by the CCD component 3. The CCD component 3 can capture information such as the shape, size, spacing, and number of PIN pins within the field of view. Then, a visual algorithm is used to compare and verify whether the captured PIN pins meet the inspection standards. The visual algorithm is a mature existing technology and will not be described in detail here.
[0039] The CCD component 3 of this invention utilizes a visual configuration of a camera, a telecentric lens 32, and a coaxial light source 31. The telecentric lens 32 addresses edge distortion, while the coaxial light source 31 eliminates interference from metallic reflections, enabling clear imaging of the edges and ends of the pins. This configuration ensures a constant size, meaning the image size remains unchanged regardless of pin height variations, avoiding the "near-to-far" error common with lenses. Furthermore, the absence of edge distortion ensures accurate measurement of pin spacing, width, and other parameters. The coaxial light source 31 also highlights the pin's outline, reducing reflection interference.
[0040] In practical implementation, the magnification of the optical system should be selected according to the pin size (e.g., 0.5X-2X) to ensure that the field of view covers all pins. In addition to using the coaxial light source 31, backlighting or low-angle ring light can also be used. Backlighting is used for contour detection (measuring pin position and spacing), while low-angle ring light is used for surface defect detection (such as scratches, oxidation, etc.).
[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A visual PIN needle detection device, comprising a test stage (1), a fixture (2) disposed on the test stage (1), and a CCD assembly (3) disposed above the fixture (2), characterized in that, The CCD assembly (3) includes a coaxial light source (31), a telecentric lens (32) and a CCD camera (33) arranged in sequence in the vertical direction away from the fixture (2). The CCD camera (33), the telecentric lens (32) and the coaxial light source (31) are on the same axis. A light shield (4) is provided on the test table (1) to cover the back and two sides of the test table (1). A connection interface (11) is provided on the test table (1).
2. The visual PIN detection device according to claim 1, characterized in that, The fixture base (2) includes a base (21) and a positioning fixture (22) detachably mounted on the base (21), the positioning fixture (22) being used to position and mount the component to be tested (a).
3. The visual PIN detection device according to claim 2, characterized in that, The test bench (1) is provided with a support plate (23) for supporting the base (21), and sensors (24) are provided on both sides of the positioning fixture (22) on the support plate (23).
4. The visual PIN detection device according to claim 3, characterized in that, A fixing frame (25) is provided on the support plate (23) behind the positioning fixture (22). A strip hole (26) is provided on the fixing frame (25) along the vertical direction. A limit cylinder (28) is detachably fixed in the strip hole (26) by fasteners (27). When the limit cylinder (28) extends, the part to be tested (a) is limited to the positioning fixture (22).
5. The visual PIN detection device according to claim 4, characterized in that, The test bench (1) is equipped with a start button (12) and an unlock / lock knob (13). The start button (12) is used to control the operation of the CCD component (3), and the unlock / lock knob (13) is used to control the extension and retraction of the limit cylinder (28).
6. The visual PIN detection device according to claim 3, characterized in that, The test stand (1) is equipped with a mounting frame (5). On the mounting frame (5), a support block (51), a support ring block (52), and a support frame (53) are respectively set at 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 located below the support frame (53).
7. The visual PIN detection device according to claim 6, characterized in that, A viewing window (41) is provided behind the light shield (4) corresponding to the positions of the CCD camera (33), the telecentric lens (32) and the coaxial light source (31).
8. The visual PIN detection device according to claim 1, characterized in that, It also includes a movable platform (6) for supporting the test bench (1), and the bottom of the movable platform (6) is provided with casters (61) and support feet (62).
9. A visual PIN detection device according to claim 8, characterized in that, The mobile platform (6) is equipped with a host (63), and the mobile platform (6) is provided with a wire trough (64) on one side of the host (63). The host (63) and the connection interface (11) are connected by a wire harness.
10. A visual PIN detection device according to claim 9, characterized in that, A pressure gauge (65) is installed on the mobile stand (6) and / or the test stand (1). An illumination light source (66) is installed on the mobile stand (6) above the test stand (1). A barcode scanner (67) is also installed on the mobile stand (6).