A PCBA intelligent first article testing device

Abstract

This utility model relates to an intelligent first-article testing device for PCBA, including an anti-static workbench. A turntable is located on the left front side of the upper end of the anti-static workbench, and a camera auxiliary frame is located on the right side of the turntable. A display unit is located on the left rear side of the upper end of the anti-static workbench, and an LCR bridge is located on the right side of the display unit. A device cover is located on the upper end of the display unit, and a groove is located at the center of the lower end of the device cover. A cylinder is located at the center of the upper end of the device cover, and a piston rod is located at the center of the lower side of the cylinder. A camera assembly is located at the lower end of the piston rod. The groove perfectly accommodates and embeds the camera assembly. The camera auxiliary frame is located directly below the camera assembly. By driving the piston rod with the cylinder (which is configured as the camera assembly), the camera assembly is vertically moved downwards, allowing the PCBA board to be image-acquired and inspected at the optimal height, further improving recognition accuracy.

Description

Technical Field

[0001] This utility model relates to the field of first article inspection technology, and in particular to an intelligent first article testing device for PCBA. Background Technology

[0002] First article inspection (PI) systems are crucial equipment for detecting quality issues in the first piece of a product. Using a PI system, the first product can be effectively and quickly assessed, promptly identifying errors such as incorrect, missing, excessive, or insufficient material placement on the first board. This allows for corrective or improvement measures to prevent batch defects. The working principle of an SMT PI system is to scan the PCB first article image, intelligently synthesize and calibrate it using the BOM list and component coordinates, measure component parameters using LCR (Liquid Crystal Recognition) and automatically compare and judge the results, ultimately generating an inspection report to ensure production quality.

[0003] Patent application number CN202221274290.5 is a Chinese utility model patent, disclosing an intelligent first-piece testing instrument, including an instrument body, a slide groove, and supporting feet. The slide groove is formed on the outer wall of the instrument body, a slide bar is installed on the inner wall of the slide groove, a protective plate is installed on the outer wall of the slide bar, a No. 1 motor is installed on the outer wall of the instrument body, a top rod is installed on the top of the instrument body, a sealing strip is installed on the top of the instrument body, a drying block is installed on the top of the protective plate, a vent hole is formed on the inner top wall of the protective plate, and a baffle is installed at the bottom of the No. 1 spring. This invention utilizes a protective plate, sealing strip, and top rod. When not in use, a primary motor rotates, moving the protective plate downwards to gradually cover the control plate until the sealing strip contacts it, sealing the control plate. The top rod then slowly lifts the baffle upwards, allowing the desiccant inside the drying block to absorb moisture from the sealed area, preventing corrosion of the control plate and extending the instrument's lifespan. However, this device has the following drawbacks: firstly, image clarity is prone to issues when using it to inspect appearance; secondly, the fixed shooting position during appearance inspection hinders further precision testing. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies. This device uses a cylinder-driven piston rod, configured as a camera assembly, to vertically move the camera assembly downwards. This allows the detection camera to accurately locate and photograph the components and solder joints on the PCBA board. Additionally, a telescopic cylinder within the camera auxiliary frame moves the circuit board placement platform up and down, enabling image acquisition and detection of the PCBA board at the optimal height. This further improves recognition accuracy and solves the technical problems of existing devices where clear images are easily lost during appearance inspection and where the fixed shooting position hinders further accuracy detection.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A PCBA intelligent first article testing device includes an anti-static workbench. A turntable is provided on the left side of the upper front of the anti-static workbench, and a camera auxiliary frame is provided on the right side of the turntable. A display unit is provided on the left side of the upper rear of the anti-static workbench, and an LCR bridge is provided on the right side of the display unit. A device cover is provided on the upper end of the display unit, and a groove is provided at the center of the lower end of the device cover. A cylinder is provided at the center of the upper end of the device cover, and a piston rod is provided at the center of the lower side of the cylinder. A camera assembly is provided at the lower end of the piston rod. The groove can accommodate the entire camera assembly for embedding. The camera auxiliary frame is located directly below the camera assembly.

[0007] As a preferred embodiment, the camera assembly includes a device frame, the upper center of which is fixedly connected to the lower end of the piston rod. A detection camera is installed inside the upper side of the device frame, and a supplementary aperture is provided at the lower end of the device frame. A camera channel is provided inside the supplementary aperture, and the supplementary aperture is located directly below the detection camera.

[0008] As a preferred embodiment, the upper front left side of the antistatic workbench is provided with a circular through hole, the right side of the through hole is provided with a rectangular through hole, and the lower end of the antistatic workbench is provided with a device plate, with a cavity between the upper end of the device plate and the lower end of the antistatic workbench.

[0009] As a preferred embodiment, the camera auxiliary frame includes a telescopic cylinder, with a telescopic rod at the center of the upper end of the telescopic cylinder. The upper end of the telescopic rod is fixedly connected to a circuit board placement platform. The circuit board placement platform has baffles on all four sides of its upper surface. The overall outer contour of the circuit board placement platform and the baffles can be perfectly embedded inside the rectangular through hole, and the telescopic cylinder is located in the cavity between the upper end of the device plate and the lower end of the anti-static workbench.

[0010] As a preferred embodiment, the turntable has a main shaft at its lower center, and the main shaft is connected to a bearing with an interference fit, the bearing being embedded inside a circular through hole.

[0011] As another preferred embodiment, the LCR bridge is electrically connected to the test pen via wires.

[0012] The beneficial effects of this utility model are:

[0013] (1) In this utility model, during the testing process, the cylinder drives the piston rod to move the camera assembly vertically downward, while the telescopic cylinder in the camera auxiliary frame moves the circuit board placement platform up and down, thereby adjusting the optimal shooting distance between the circuit board placement platform and the detection camera, so that the PCBA board can be image acquired and detected at the optimal height, improving the recognition accuracy. Compared with manual visual inspection, this device improves the detection efficiency and consistency, and reduces human error.

[0014] (2) In this utility model, the image clarity can be improved by setting up a detection camera in conjunction with a supplementary aperture and a baffle. The supplementary aperture enables the detection camera to provide uniform illumination in insufficient ambient light, so that the camera can accurately capture detailed images such as component soldering and chip mounting, thereby improving the recognition accuracy. At the same time, the baffle around the top of the circuit board placement platform can prevent the circuit board from reflecting light due to external light, which would cause the image to be unclear, further improving the image clarity and test accuracy, ensuring that the first test results have a high degree of consistency and credibility, and providing reliable data support for subsequent mass production.

[0015] (3) In this utility model, by setting the structure in which the camera component can be perfectly embedded in the groove, when the camera component is not in use, it can be reset by the cylinder to hide the camera component inside the lower end of the equipment cover, avoiding dust pollution and accidental damage, while saving the upper operating space.

[0016] In summary, this device has the advantage of enabling PCBA boards to be image acquired and inspected at the optimal height, thus improving recognition accuracy, and is particularly suitable for the field of first article inspection technology. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the groove and camera assembly structure in this utility model.

[0020] Figure 3 This is a schematic diagram showing the positions of the circular and rectangular through holes in this utility model.

[0021] Figure 4 This is a schematic diagram of the camera auxiliary frame structure in this utility model.

[0022] Figure 5 This is a schematic diagram showing the cooperation between the camera auxiliary frame and the anti-static workbench in this utility model.

[0023] Figure 6 This is a schematic diagram of the transfer platform structure of this utility model. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] Example 1

[0026] like Figures 1 to 6 As shown, this utility model provides an intelligent first article testing device for PCBA, including an anti-static workbench 1. The upper surface of the anti-static workbench 1 is covered with anti-static rubber to prevent damage to electronic components of the PCBA board due to electrostatic discharge during testing, ensuring a safe testing environment. A turntable 11 is provided on the upper front left side of the anti-static workbench 1. The turntable 11 is used to support and rotate the PCBA board, facilitating operator testing. A camera auxiliary frame 12 is provided on the right side of the turntable 11. A display unit 2 is provided on the upper rear left side of the anti-static workbench 1. This device uses a PLC programmable controller as the core control unit, integrated inside the display unit 2. The controller communicates with components such as a cylinder 42, a detection camera 432, an LCR bridge 3, and a test pen 31 through multiple input / output interfaces to realize automated control of the equipment and management of the testing process. The display unit 2 is an integrated human-machine interface (HMI), which includes an image processing module, a data storage unit, etc., for operation interface display and image acquisition feedback. The display unit 2 includes functions such as defect identification result display. An LCR bridge 3 is located on the right side of the display unit 2. The LCR bridge 3 is an electrical parameter testing module used to measure the parameters of components such as inductors, capacitors, and resistors on the PCBA board. It works in conjunction with an image recognition system to achieve dual-dimensional detection of "image + electrical". The display unit 2 has a device cover 4 at its upper end. A groove 41 is located at the center of the lower end of the device cover 4. A cylinder 42 is located at the center of the upper end of the device cover 4. A piston rod 411 is located at the center of the lower side of the cylinder 42. The cylinder 42 is a double-acting cylinder connected to an external air source system. The lifting and lowering action of the cylinder is controlled by a solenoid valve, enabling automatic lifting and lowering of the camera assembly 43, avoiding frequent manual operation. The camera assembly 43 is located at the lower end of the piston rod 411. The groove 41 perfectly accommodates the camera assembly 43, preventing dust from entering and affecting image quality. The camera auxiliary frame 12 is located directly below the camera assembly 43, ensuring that the PCBA board is always directly below the camera during testing, forming the optimal image acquisition angle.

[0027] Furthermore, the camera assembly 43 includes a device frame 431, the upper center of which is fixedly connected to the lower end of the piston rod 411. A detection camera 432, which is a high-definition industrial camera, is installed inside the upper side of the device frame 431. A supplementary aperture 433 is provided at the lower end of the device frame 431. Multiple high-brightness LED light sources are arranged in a ring inside the supplementary aperture 433. A camera channel is provided inside the supplementary aperture 433. The supplementary aperture 433 is located directly below the detection camera 432. The camera channel is a circular through hole in the center of the supplementary aperture 433, with a diameter slightly larger than the field of view of the detection camera 432 lens, to ensure that light is evenly irradiated onto the PCBA board surface without affecting the image acquisition of the camera.

[0028] Furthermore, a circular through hole 13 is provided on the left side of the upper front end of the antistatic workbench 1. The circular through hole 13 is used to install the turntable spindle 111. Its size matches the outer diameter of the bearing 112 to ensure that the spindle rotates stably and without deviation. A rectangular through hole 14 is provided on the right side of the through hole 13. The rectangular through hole 14 is the embedded structure of the circuit board placement platform 123. Its size is slightly larger than the shape of the circuit board placement platform 123 so that it can move up and down without jamming. A device plate 15 is provided at the lower end of the antistatic workbench 1. A cavity is left between the upper end of the device plate 15 and the lower end of the antistatic workbench 1.

[0029] Furthermore, the camera auxiliary frame 12 includes a telescopic cylinder 121. A telescopic rod 122 is located at the center of the upper end of the telescopic cylinder 121. The telescopic cylinder 121 is driven by an external air source, causing the telescopic rod 122 to move up and down, controlling the lifting height of the circuit board placement platform 123. The upper end of the telescopic rod 122 is fixedly connected to the circuit board placement platform 123. The circuit board placement platform 123 is a smooth platform with an anti-slip coating to prevent the PCBA board from sliding during testing. The upper surface of the circuit board placement platform 123 is surrounded by baffles 124, each baffle being 5cm high. The edge of the board placement platform 123 is set to shield the light and prevent external light from interfering with the camera imaging. It is integrally formed with the board placement platform 123. The overall outer contour of the board placement platform 123 and the guard edge 124 can be perfectly embedded into the rectangular through hole 14. When no appearance camera inspection is being performed, the entire structure of the board placement platform 123 is embedded into the rectangular through hole 14 by means of the telescopic cylinder 121. The upper edge of the guard edge 124 is flush with the anti-static workbench 1, forming a groove-like shape on the anti-static workbench 1. This does not affect the subsequent inspection process. The telescopic cylinder 121 is located in the cavity between the upper end of the device plate 15 and the lower end of the anti-static workbench 1.

[0030] Furthermore, a main shaft 111 is provided at the lower center of the turntable 11. The main shaft 111 is connected to a bearing 112 by an interference fit. The bearing 112 is embedded in the circular through hole 13. When the circuit board is placed on the turntable 11 for testing with the test pen 31, the operator can manually rotate the turntable 11 to make the turntable 11 drive the circuit board to rotate, which is convenient for manual testing.

[0031] Furthermore, the LCR bridge 3 is electrically connected to the test pen 31 via wires. The test pen 31 is a probe structure with a spring reset function to ensure good contact between the probe and the component solder joint during the test and avoid poor connection. The LCR bridge 3 is electrically connected to the display unit 2, and the test data can be displayed and saved in real time for easy subsequent analysis and traceability.

[0032] Working process: First, the operator places the PCBA board to be tested on the circuit board placement platform 123 of the camera auxiliary frame 12. Then, the equipment is started, and the telescopic cylinder 121 pushes the telescopic rod 122 to raise the circuit board placement platform 123 to the preset height. At the same time, the cylinder 42 of the equipment cover 4 drives the piston rod 411 to drive the camera assembly 43 to descend vertically. The detection camera 432 and the supplementary aperture 433 are adjusted to the optimal imaging distance of the PCBA board. The detection camera 432 collects detailed images of component soldering under the uniform illumination of the supplementary aperture 433. The display unit 2 performs real-time defect analysis. Then, the circuit board placement platform 123 and the camera assembly 43 are reset. The operator places the PCBA board to be tested on the turntable 11 and uses the test pen 31 to test it. When using the test pen 32 to test, the operator can manually rotate the turntable 11, which will make the turntable 11 rotate the circuit board, which is convenient for manual inspection.

[0033] In the description of this utility model, it should be understood that the terms "front and back", "left and right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0034] Of course, those skilled in the art should understand that the term "a" should be understood as "at least one" or "one or more". That is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be understood as a limitation on the quantity.

[0035] The above description is merely a preferred embodiment of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art under the technical guidance of this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A PCBA intelligent first piece test device, characterized in that: The device includes an anti-static workbench (1), a turntable (11) on the left front side of the upper end of the anti-static workbench (1), a camera auxiliary frame (12) on the right side of the turntable (11), a display unit (2) on the left rear side of the upper end of the anti-static workbench (1), an LCR bridge (3) on the right side of the display unit (2), a device cover (4) on the upper end of the display unit (2), a groove (41) at the center of the lower end of the device cover (4), a cylinder (42) at the center of the upper end of the device cover (4), a piston rod (411) at the center of the lower side of the cylinder (42), a camera assembly (43) at the lower end of the piston rod (411), and the groove (41) perfectly accommodates the camera assembly (43) for complete embedding. The camera auxiliary frame (12) is located directly below the camera assembly (43).

2. The PCBA intelligent first piece test device according to claim 1, characterized in that, The camera assembly (43) includes a device frame (431), the upper center of which is fixedly connected to the lower end of the piston rod (411). A detection camera (432) is installed on the upper side inside the device frame (431). A supplementary aperture (433) is provided at the lower end of the device frame (431). A camera channel is provided inside the supplementary aperture (433). The supplementary aperture (433) is located directly below the detection camera (432).

3. The PCBA intelligent first piece test device according to claim 1, characterized in that, The antistatic workbench (1) has a circular through hole (13) on the left side of the upper front end, and a rectangular through hole (14) on the right side of the through hole (13). The antistatic workbench (1) has a device plate (15) at the lower end, and there is a cavity between the upper end of the device plate (15) and the lower end of the antistatic workbench (1).

4. The PCBA intelligent first piece test device of claim 1, wherein, The camera auxiliary frame (12) includes a telescopic cylinder (121). The telescopic cylinder (121) has a telescopic rod (122) at the center of its upper end. The upper end of the telescopic rod (122) is fixedly connected to a circuit board placement platform (123). The circuit board placement platform (123) has baffles (124) around its upper surface. The overall outer contour of the circuit board placement platform (123) and the baffles (124) can be embedded in the rectangular through hole (14). The telescopic cylinder (121) is located in the cavity between the upper end of the device plate (15) and the lower end of the antistatic workbench (1).

5. The PCBA intelligent first piece test device according to claim 1, characterized in that, The turntable (11) has a main shaft (111) at the lower center, and the main shaft (111) is connected to a bearing (112) by interference fit. The bearing (112) is embedded in the circular through hole (13).

6. The PCBA intelligent first piece test device according to claim 1, characterized in that, The LCR bridge (3) is electrically connected to the test pen (31) via a wire.

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