An ar virtual optical-based aoi online anomaly detection device and method

Abstract

This application belongs to the field of circuit board inspection technology, and provides an AOI online anomaly detection device and method based on AR virtual optics. The device includes a base, a transport frame is fixedly installed at one end of the base, a conveyor belt is rotatably installed inside the transport frame, a column located on one side of the transport frame is fixedly installed on the base, a turntable is rotatably installed on the column, and a motor that drives the turntable is fixedly installed on the base. This application uses multiple sets of pick-up frames to intermittently rotate in a cycle to pick up, inspect, and put back PCB boards, while new PCB boards to be inspected are reloaded, thereby realizing continuous cyclical inspection of automatic loading, inspection, and unloading, eliminating the need for manual loading and unloading and waiting for PCB boards to be flipped, thus improving the inspection efficiency of PCB boards.

Description

Technical Field

[0001] This invention belongs to the field of circuit board inspection technology, and particularly relates to an AOI online anomaly detection device and method based on AR virtual optics. Background Technology

[0002] During the circuit board manufacturing process, AOI (Automated Optical Inspection) is required. AOI inspection involves the machine automatically scanning the PCBA product with a high-definition CCD camera, capturing images, comparing the test points with qualified parameters in the database, processing the images, identifying defects on the target product, and displaying or marking the defects on a monitor or automatic marker for repair personnel and SMT engineers to improve the process.

[0003] Existing AOI testing of circuit boards typically requires double-sided testing. However, current testing devices require manual flipping and clamping of the circuit board after testing one side, which is inconvenient. To address this technical problem, Chinese patent CN218036490U proposes a method that uses a drive motor and a rotating shaft to rotate the first and second fixed frames, thereby flipping the circuit board to test the other side without manual flipping and clamping. This is convenient and quick. However, the circuit board still requires manual installation and removal after testing, and waiting for it to flip during testing adds a lot of steps and reduces the efficiency of circuit board testing. Summary of the Invention

[0004] The purpose of this invention is to provide an AOI online anomaly detection device and method based on AR virtual optics, which aims to solve the technical problem that the existing technology requires manual installation and disassembly of circuit boards, thus reducing the efficiency of circuit board detection.

[0005] The present invention is implemented as follows: an AOI online anomaly detection device based on AR virtual optics includes a base, a transport frame is fixedly installed at one end of the base, a conveyor belt is rotatably installed inside the transport frame, a column located on one side of the transport frame is fixedly installed on the base, a turntable is rotatably installed on the column, and a motor that drives the turntable to rotate is fixedly installed on the base. Multiple sets of support rods are rotatably mounted on the turntable. A U-shaped retrieval frame is fixedly mounted on the end of the support rod away from the turntable. A sliding groove is opened on the parallel side wall of the retrieval frame. A first support plate and a second support plate are arranged in the sliding groove. The first support plate and the second support plate move synchronously along the direction perpendicular to the side wall where the sliding groove is located. A top plate and a bottom plate are fixedly mounted on the end of the first support plate and the second support plate located in the retrieval frame, respectively. A second electric telescopic rod that drives the first support plate and the second support plate to move synchronously and a first electric telescopic rod that drives the second support plate to move closer to the first support plate are fixedly mounted on the side wall of the retrieval frame. When the turntable rotates, it drives the support rod to rotate by a set angle. An extrusion plate that fixes the support rod is provided on the turntable. A U-shaped movable frame is slidably mounted on the base. Cameras are fixedly installed inside the two parallel side walls of the movable frame. A servo module that drives the movable frame to move is provided on the base.

[0006] A further technical solution: The output shaft of the motor is parallel to the column, and a first gear is fixedly installed at the output end of the motor. The first gear meshes with a power gear ring fixedly installed on the side of the turntable, and the power gear ring is coaxially arranged with the turntable.

[0007] A further technical solution: A laser emitter is fixedly installed on the surface of the base plate near the top plate, and a laser receiver is fixedly installed at a corresponding position on the top plate.

[0008] A further technical solution: A vertical plate is fixedly installed at the end of the second support plate away from the base plate. The vertical plate passes through the first support plate and is slidably connected to the first support plate. The first electric telescopic rod is fixedly installed on the first support plate and its output end is fixedly connected to the vertical plate. The first support plate is slidably installed on the retrieval rack through the mounting plate.

[0009] A further technical solution: A sliding sleeve is slidably installed on the vertical plate, and a second electric telescopic rod is fixedly installed on the sliding sleeve. The end of the second electric telescopic rod away from the sliding sleeve is fixedly connected to the retrieval frame.

[0010] A further technical solution: A second gear is fixedly installed on the support rod. The second gear is used in conjunction with two sets of incomplete gear rings fixedly installed on the column. The two sets of incomplete gear rings are located on the upper and lower sides of the second gear. The projections of the two sets of incomplete gear rings onto the base do not overlap. When the pick-up rack leaves the transport rack and returns to the top of the transport rack, the second gear meshes with one of the sets of incomplete gear rings.

[0011] Further technical solution: The extrusion plate is provided in multiple sets and corresponds to the position of the support rod. The extrusion plate is slidably installed on the turntable and distributed along the length direction of the support rod. A friction plate that cooperates with the extrusion plate is fixedly installed on the support rod. A permanent magnet is fixedly installed at the end of the support rod away from the friction plate. The permanent magnet cooperates with an electromagnet fixedly installed on the turntable.

[0012] The present invention also provides a detection method applied to the above-described AR virtual optics-based AOI online anomaly detection device, comprising the following steps: Step S1: Place the PCB board to be inspected on the conveyor belt, and the conveyor belt will move the PCB board to the pick-up rack and stop moving. Step S2: The second electric telescopic rod drives the base plate to move below the end of the PCB board, and then the first electric telescopic rod drives the second support plate and the base plate to move upward so that the base plate and the top plate clamp and fix the PCB board. Step S3: The motor drives the turntable to rotate 90 degrees through the first gear and the power gear ring. At the same time, the pick-up rack rotates 90 degrees and holds. The turntable stops for a set time after rotating 90 degrees, so that the pick-up racks in different positions can complete the clamping, rotating and detection operations. Step S4: After the PCB board picker completes the inspection, it will rotate in the opposite direction to a horizontal position after moving above the transport frame. Then, the base plate will move downward to place the inspected PCB board on the conveyor belt for transport. At the same time, a new PCB board to be inspected will be moved to this position for reloading.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. By using multiple sets of pick-up racks to rotate intermittently in a cycle, PCB boards are picked up, inspected, and returned. At the same time, new PCB boards to be inspected are reloaded, thereby realizing continuous cycle inspection of automatic loading, inspection, and unloading. There is no need for manual loading and unloading or waiting for PCB boards to flip, which improves the inspection efficiency of PCB boards. 2. During the rotation of the pick-up rack, it rotates 90 degrees so that the opening faces downwards. At this time, the PCB board rotates to a vertical position. Since both ends of the PCB board are clamped and the PCB board changes from a flat position to a vertical position, the direction of gravity in the vertical position is parallel to the PCB board. The strength of the material itself in the entire width of the PCB board resists the deformation caused by gravity, reducing the probability of PCB board deformation and bending. This ensures that the PCB board can be inspected in a flat state, improving the accuracy of PCB board inspection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0015] Figure 2 This is a schematic diagram of the connection between the retrieval rack and the turntable in this invention.

[0016] Figure 3 This is a schematic diagram of the turntable structure in this invention.

[0017] Figure 4 This is a schematic diagram of the structure of the retrieval rack in this invention.

[0018] Figure 5 for Figure 1 An enlarged schematic diagram of region A in the middle.

[0019] In the attached diagram: 1. Base; 2. Transport frame; 3. Conveyor belt; 4. Column; 5. Turntable; 6. Motor; 7. First gear; 8. Power gear ring; 9. Support rod; 10. Pick-up frame; 11. Slide groove; 12. First support plate; 13. Mounting plate; 14. Top plate; 15. Second support plate; 16. Base plate; 17. Laser emitter; 18. Vertical plate; 19. First electric telescopic rod; 20. Second electric telescopic rod; 21. Sliding sleeve; 22. Second gear; 23. Incomplete gear ring; 24. Friction plate; 25. Extrusion plate; 26. Permanent magnet; 27. Electromagnet; 28. Moving frame; 29. ​​Camera; 30. Servo module. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0021] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0022] like Figures 1-5 As shown, this invention provides an AOI online anomaly detection device based on AR virtual optics, comprising a base 1, a transport frame 2 fixedly mounted at one end of the base 1, a conveyor belt 3 rotatably mounted inside the transport frame 2, a column 4 fixedly mounted on the base 1 located on one side of the transport frame 2, a turntable 5 rotatably mounted on the column 4, and a motor 6 fixedly mounted on the base 1 to drive the turntable 5 to rotate. The output shaft of the motor 6 is parallel to the column 4, and a first gear 7 is fixedly mounted at the output end of the motor 6. The first gear 7 meshes with a power gear ring 8 fixedly mounted on the side of the turntable 5, and the power gear ring 8 is coaxially arranged with the turntable 5.

[0023] The turntable 5 is equipped with multiple sets of support rods 9. A U-shaped retrieval frame 10 is fixedly installed at the end of each support rod 9 away from the turntable 5. Each retrieval frame 10 has a sliding groove 11 on its parallel sidewall. A first support plate 12 and a second support plate 15 are installed within the sliding groove 11. The first support plate 12 and the second support plate 15 move synchronously along a direction perpendicular to the sidewall of the sliding groove 11. A top plate 14 and a bottom plate 16 are fixedly installed at the ends of the first support plate 12 and the second support plate 15 within the retrieval frame 10, respectively. A second electric telescopic rod 20, which drives the first support plate 12 and the second support plate 15 to move synchronously, and a first electric telescopic rod 19, which drives the second support plate 15 to move closer to the first support plate 12, are fixedly installed on the sidewall of the retrieval frame 10. A laser emitter 17 is fixedly installed on the surface of the bottom plate 16 near the top plate 14, and a laser receiver is fixedly installed at a corresponding position on the top plate 14. A vertical plate 18 is fixedly installed at the end of the second support plate 15 away from the bottom plate 16, and the vertical plate 18 penetrates the first support plate. 12 and slidably connected to the first support plate 12, the first electric telescopic rod 19 is fixedly installed on the first support plate 12 and the output end of the first electric telescopic rod 19 is fixedly connected to the vertical plate 18, the first support plate 12 is slidably installed on the retrieval frame 10 through the mounting plate 13, the vertical plate 18 is slidably installed with a sliding sleeve 21, the second electric telescopic rod 20 is fixedly installed on the sliding sleeve 21, the end of the second electric telescopic rod 20 away from the sliding sleeve 21 is fixedly connected to the retrieval frame 10, when the turntable 5 rotates, it drives the support rod 9 to rotate at a set angle, the turntable 5 is provided with a pressing plate 25 for fixing the support rod 9, the support rod 9 is fixedly installed with a second gear 22, the second gear 22 is used in conjunction with two sets of incomplete gear rings 23 fixedly installed on the column 4, the two sets of incomplete gear rings 23 are located on the upper and lower sides of the second gear 22, the projections of the two sets of incomplete gear rings 23 onto the base 1 do not overlap, when the retrieval frame 10 leaves the transport frame 2 and returns to the top of the transport frame 2, the second gear 22 meshes with one of the sets of incomplete gear rings 23.

[0024] The base 1 has a U-shaped movable frame 28 that is slidably mounted on it. Cameras 29 are fixedly mounted inside the two parallel side walls of the movable frame 28. The base 1 is equipped with a servo module 30 that drives the movable frame 28 to move.

[0025] In practical application, the PCB board to be tested is placed on the conveyor belt 3. In the initial state, the pick-up rack 10 located above the transport rack 2 is in a flat state with its opening facing the material feeding position of the conveyor belt 3. At this time, the height of the lower surface of the base plate 16 is lower than the height of the lower surface of the pick-up rack 10, and there is a gap between the height of the lower surface of the base plate 16 and the upper surface of the conveyor belt 3. The PCB board is conveyed by conveyor belt 3 and moves to the pick-up rack 10, where it stops. The operation of conveyor belt 3 can be controlled by visually detecting the position of the PCB board. Since both sides of the PCB board are covered with patches of different thicknesses, a distance will be created between the PCB board and the conveyor belt 3. After the PCB board stops moving, the second electric telescopic rod 20 pulls the vertical plate 18 towards the side wall of the pick-up rack 10 via the sliding sleeve 21, thereby causing the first support plate 12 and the second support plate 15 to move synchronously towards the PCB board. When the laser receiver can no longer receive the laser emitted by the laser emitter 17... This indicates that the laser is blocked by the PCB board. The base plate 16 moves to the bottom of the PCB board. At this time, the second electric telescopic rod 20 stops working. Then, the first electric telescopic rod 19 drives the second support plate 15 and the base plate 16 to move upward through the vertical plate 18. After the base plate 16 moves upward, it contacts the edge of the PCB board and pushes the PCB board to rotate. When both sets of base plates 16 are in contact with the edge of the PCB board, they will push the PCB board to move upward until the PCB board contacts the top plate 14. At this time, the PCB board can be clamped and fixed from both ends of the PCB board through the base plate 16 and the top plate 14 and the PCB board can be removed from the conveyor belt 3. Then, the motor 6 drives the turntable 5 to rotate 90 degrees through the first gear 7 and the power gear ring 8. The turntable 5 drives the pick-up frame 10 to rotate synchronously. When the turntable 5 rotates, the second gear 22 meshes with the incomplete gear ring 23 located below it. When the two mesh, the pressing plate 25 no longer fixes the support rod 9. As the turntable 5 rotates, under the action of the incomplete gear ring 23 and the second gear 22, the pick-up frame 10 can rotate around the axis of the support rod 9 when it revolves. When the second gear 22 disengages from the incomplete gear ring 23, the pressing plate 25 fixes the support rod 9 again. At this time, the pick-up frame 10 rotates 90 degrees with the opening facing down, and the PCB board changes from a flat state to a vertical state. At the same time, the pick-up frame 10 on the rear side, which was originally in the state of having the opening facing down, meshes with another set of incomplete gear rings 23 located on the upper side of the support rod 9 during the rotation. This set of pick-up frames 10 rotates in the opposite direction to a horizontal state and moves to the top of the transport frame 2. The new PCB board on the conveyor belt 3 moves into this set of pick-up frames 10 for clamping. Repeat the above steps. When the pick-up rack 10, which holds the PCB board and has its opening facing down, moves to the area where the camera 29 is located and stops, the servo module 30 drives the moving rack 28 to move closer to the transport rack 2 until the camera 29 moves to the area where the PCB board is located. At this time, the two sets of cameras 29 are located on both sides of the PCB board to take pictures and detect the PCB board. After the detection is completed, the moving rack 28 is reset. After the pick-up rack 10, which has finished picking up the PCB board, moves to the top of the transport rack 2, it will rotate in the opposite direction to the horizontal state. Then the base plate 16 moves down to place the detected PCB board on the conveyor belt 3 for transport. At the same time, a new PCB board to be detected moves to this place for re-loading, thereby realizing the continuous cycle detection of automatic loading, detection and unloading. There is no need for manual loading and unloading and waiting for the PCB board to be flipped, which improves the detection efficiency of the PCB board. During testing, the PCB board is clamped at both ends and changes from a flat to a vertical position. In the vertical position, the direction of gravity is parallel to the PCB board. The strength of the material itself along the entire width of the PCB board resists the deformation caused by gravity, reducing the probability of PCB board deformation and bending. This ensures that the PCB board can be tested in a flat state, improving the accuracy of PCB board testing.

[0026] like Figure 1 , Figure 3 , Figure 5 As shown, this invention provides an AOI online anomaly detection device based on AR virtual optics. Multiple sets of extrusion plates 25 are provided and correspond to the positions of the support rods 9. The extrusion plates 25 are slidably mounted on the turntable 5 and distributed along the length direction of the support rods 9. Friction plates 24 that cooperate with the extrusion plates 25 are fixedly mounted on the support rods 9. A permanent magnet 26 is fixedly mounted at the end of the support rods 9 away from the friction plates 24. The permanent magnet 26 cooperates with an electromagnet 27 fixedly mounted on the turntable 5.

[0027] In practical application, when the second gear 22 is not in contact with the incomplete gear ring 23, the electromagnet 27 is energized. After the electromagnet 27 is energized, it generates a pushing force on the permanent magnet 26. Under the push of the magnetic force, the pressing plate 25 comes into contact with the friction plate 24, and then the support rod 9 is fixed under the action of friction, ensuring that the support rod 9 is in a stable state. This ensures that the PCB board is in a vertical state during subsequent testing, thereby improving the accuracy of PCB board testing.

[0028] like Figures 1-5 As shown, the present invention provides a detection method applied to the aforementioned AR virtual optics-based AOI online anomaly detection device, which includes the following steps: Step S1: Place the PCB board to be inspected on the conveyor belt 3. The conveyor belt 3 will move the PCB board to the pick-up rack 10 and stop moving. Step S2: The second electric telescopic rod 20 drives the base plate 16 to move below the end of the PCB board. Then the first electric telescopic rod 19 drives the second support plate 15 and the base plate 16 to move upward so that the base plate 16 and the top plate 14 clamp and fix the PCB board. Step S3: Motor 6 drives turntable 5 to rotate 90 degrees through first gear 7 and power gear ring 8. At the same time, the pick-up rack 10 rotates 90 degrees and holds. Turntable 5 stops for a set time after rotating 90 degrees, so that the pick-up rack 10 in different positions can complete the clamping, rotating and detection operations. Step S4: After the PCB board picker 10 is moved above the transport rack 2, it will rotate in the opposite direction to a horizontal state. Then the base plate 16 moves downward to place the inspected PCB board on the conveyor belt 3 for transport. At the same time, a new PCB board to be inspected is moved to this location for reloading.

[0029] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An AOI online anomaly detection device based on AR virtual optics, comprising a base (1), a transport frame (2) fixedly mounted at one end of the base (1), and a conveyor belt (3) rotatably mounted inside the transport frame (2), characterized in that, A column (4) located on one side of the transport frame (2) is fixedly installed on the base (1). A turntable (5) is rotatably installed on the column (4), and a motor (6) that drives the turntable (5) to rotate is fixedly installed on the base (1). Multiple sets of support rods (9) are rotatably mounted on the turntable (5). A U-shaped retrieval frame (10) is fixedly mounted on the end of the support rod (9) away from the turntable (5). A sliding groove (11) is provided on the parallel side wall of the retrieval frame (10). A first support plate (12) and a second support plate (15) are provided in the sliding groove (11). The first support plate (12) and the second support plate (15) move synchronously along the direction perpendicular to the side wall of the sliding groove (11). The ends of the first support plate (12) and the second support plate (15) located in the retrieval frame (10) are respectively... The top plate (14) and bottom plate (16) are fixedly installed. A second electric telescopic rod (20) that drives the first support plate (12) and the second support plate (15) to move synchronously is fixedly installed on the side wall of the retrieval frame (10). A first electric telescopic rod (19) that drives the second support plate (15) to move closer to the first support plate (12) is fixedly installed on the first support plate (12). When the turntable (5) rotates, it drives the support rod (9) to rotate at a set angle. A pressing plate (25) that fixes the support rod (9) is provided on the turntable (5). A U-shaped movable frame (28) is slidably installed on the base (1). Cameras (29) are fixedly installed in the two parallel side walls of the movable frame (28). A servo module (30) that drives the movable frame (28) to move is provided on the base (1). The second gear (22) is fixedly installed on the support rod (9). The second gear (22) is used in conjunction with two sets of incomplete gear rings (23) fixedly installed on the column (4). The two sets of incomplete gear rings (23) are located on the upper and lower sides of the second gear (22). The projections of the two sets of incomplete gear rings (23) onto the base (1) do not overlap. When the pick-up rack (10) leaves the transport rack (2) and returns to the top of the transport rack (2), the second gear (22) meshes with one of the sets of incomplete gear rings (23).

2. The AOI online anomaly detection device based on AR virtual optics according to claim 1, characterized in that, The output shaft of the motor (6) is parallel to the column (4). The output end of the motor (6) is fixedly installed with a first gear (7). The first gear (7) meshes with a power gear ring (8) fixedly installed on the side of the turntable (5). The power gear ring (8) is coaxially arranged with the turntable (5).

3. The AOI online anomaly detection device based on AR virtual optics according to claim 1, characterized in that, A laser emitter (17) is fixedly installed on the surface of the base plate (16) near the top plate (14), and a laser receiver is fixedly installed at the corresponding position on the top plate (14).

4. The AOI online anomaly detection device based on AR virtual optics according to claim 1, characterized in that, A vertical plate (18) is fixedly installed at the end of the second support plate (15) away from the bottom plate (16). The vertical plate (18) passes through the first support plate (12) and is slidably connected to the first support plate (12). The first electric telescopic rod (19) is fixedly installed on the first support plate (12) and the output end of the first electric telescopic rod (19) is fixedly connected to the vertical plate (18). The first support plate (12) is slidably installed on the retrieval rack (10) through the mounting plate (13).

5. The AOI online anomaly detection device based on AR virtual optics according to claim 4, characterized in that, A sliding sleeve (21) is slidably installed on the vertical plate (18), and a second electric telescopic rod (20) is fixedly installed on the sliding sleeve (21). The end of the second electric telescopic rod (20) away from the sliding sleeve (21) is fixedly connected to the retrieval frame (10).

6. The AOI online anomaly detection device based on AR virtual optics according to claim 1, characterized in that, The extrusion plate (25) is provided in multiple sets and corresponds to the position of the support rod (9). The extrusion plate (25) is slidably installed on the turntable (5) and distributed along the length direction of the support rod (9). A friction plate (24) that cooperates with the extrusion plate (25) is fixedly installed on the support rod (9). A permanent magnet (26) is fixedly installed at the end of the support rod (9) away from the friction plate (24). The permanent magnet (26) cooperates with an electromagnet (27) fixedly installed on the turntable (5).

7. A detection method, characterized in that, An AOI online anomaly detection device based on AR virtual optics as described in any one of claims 1-6 includes the following steps: Step S1: Place the PCB board to be inspected on the conveyor belt (3), and the conveyor belt (3) will move the PCB board to the pick-up rack (10) and stop moving. Step S2: The second electric telescopic rod (20) drives the base plate (16) to move to the lower end of the PCB board. Then the first electric telescopic rod (19) drives the second support plate (15) and the base plate (16) to move upward so that the base plate (16) and the top plate (14) clamp and fix the PCB board. Step S3: The motor (6) drives the turntable (5) to rotate 90 degrees through the first gear (7) and the power gear ring (8). At the same time, the pick-up rack (10) rotates 90 degrees and holds. The turntable (5) stops for a set time after rotating 90 degrees, so that the pick-up rack (10) in different positions can complete the clamping, rotating and detection operations. Step S4: After the PCB board picker (10) is moved above the transport rack (2), it will rotate in the opposite direction to a horizontal state. Then the base plate (16) moves downward to place the inspected PCB board on the conveyor belt (3) for transport. At the same time, a new PCB board to be inspected is moved to this location for reloading.

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