Multi-dimensional intelligent AOI detection platform and detection process based on flat panel products

Abstract

The present application relates to product appearance detection technical field, especially to a kind of based on flat product multidimensional intelligent AOI detection platform and detection process, including support platform;Line scanning detection module, be located on support platform, it is suitable for detecting the front and back and side of product;Area array detection module, be located on support platform, it is suitable for detecting the other characteristics of product;Visual guidance camera, be located on support platform, it is suitable for determining the position of product relative to line scanning detection module and area array detection module;Product shaft module, be located on support platform.By product shaft module changes the attitude of product, and product is transported to corresponding detection station, realize accurate and comprehensive detection, to realize the comprehensive detection of product on one platform, avoid the precision reduction caused by product rotation on different equipment, improve the detection precision, simultaneously, each detection area is integrated to line scanning detection module and area array detection module, improve the overall detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of product appearance inspection technology, and in particular to a multi-dimensional intelligent AOI inspection platform and inspection process for flat-panel products. Background Technology

[0002] Currently, the appearance inspection areas for tablet products on the market include: the front, back, sides, and other features (such as speakers, logos, cameras, etc.). The side areas are further subdivided into four rounded corner areas and four planar areas. In production, linear scanning or area scanning is generally used to inspect these areas.

[0003] Linear scan principle: Refer to Figure 1 The system includes a line scan camera 8, a line scan lens 81, and a line scan light source 82. The line scan camera, the line scan light source 82, and the plane to be measured 84 form angles a and b (ab are variables) respectively, and form a set of optical paths. The object distance between the imaging point 83 and the line scan lens 81 is c. With a, b, and c remaining constant, the line scan camera 8 and the plane to be measured 84 move at a relatively uniform speed, thereby outputting a clear image of the scanned surface.

[0004] Array principle: refer to Figure 2 It includes an area array camera 9, an area array lens 91, and an area array light source 92. The area array camera is at a 90° angle to the plane to be measured 94, and the object distance between the imaging point 93 and the area array lens 91 is d. After the relative positions are stationary, a clear image is output by fixed shooting.

[0005] Because line scan cameras have a small depth of field, they can generally only detect planar areas. Detection of rounded corner areas requires a separate area scan camera. Furthermore, different areas on the product need to be inspected in different orientations. Therefore, in existing technologies, multiple devices are generally required to rotate between products to achieve comprehensive inspection. Summary of the Invention

[0006] To address the technical problems in the prior art, this invention provides a multi-dimensional intelligent AOI inspection platform and inspection process for flat panel products.

[0007] In a first aspect, this invention discloses a multi-dimensional intelligent AOI inspection platform for tablet products.

[0008] The present invention relates to a multi-dimensional intelligent AOI inspection platform for flat panel products, comprising a support platform; a line scan inspection module, disposed on the support platform, suitable for inspecting the front, back, and side of the product; an area array inspection module, disposed on the support platform, suitable for inspecting other features of the product; a vision guidance camera, disposed on the support platform, suitable for determining the position of the product relative to the line scan inspection module and the area array inspection module; and a product axis module, disposed on the support platform, the product axis module being suitable for changing the product's posture and conveying the product sequentially through the inspection areas of the vision guidance camera, the line scan inspection module, and the area array inspection module.

[0009] Through the above technical solution, during operation, the operator places the product on the product axis module. The product axis module transports the product sequentially beneath the vision guidance camera, the line scan detection module, and the area scan detection module. When passing beneath the vision guidance camera, the camera captures the features of the flat panel, determining the actual relative positions of the line scan camera, the area scan camera, and the product. The product axis module then transports the product to the line scan camera detection position, i.e., the scanning area of ​​the line scan camera. The line scan camera then scans the front and sides of the product and outputs front and side images. Afterward, the product axis module transports the product to the area scan camera detection position, i.e., the scanning area of ​​the area scan camera. The area scan camera captures other features on the product and outputs images. By changing the product's posture through the product axis module and transporting the product to the corresponding detection station, accurate and comprehensive detection is achieved. This allows for comprehensive product detection on a single platform, avoiding the accuracy reduction caused by rotating the product across different devices, thus improving detection accuracy. Furthermore, integrating each detection area into the line scan detection module and the area scan detection module improves overall detection efficiency.

[0010] Furthermore, the line scan detection module includes a detection frame mounted on a support platform; an X1-axis sliding stage that slides along the X-axis on the detection frame; a Z1-axis sliding stage that slides along the Z-axis on the X1-axis sliding stage; an R1 rotating seat that is rotatably mounted on the Z1-axis sliding stage, with the rotation axis of the R1 rotating seat set along the Y-axis; and a line scan camera mounted on the R1 rotating seat and tilted.

[0011] Through the above technical solution, the X1 axis sliding stage can adjust the position of the line scan camera along the X-axis direction, and the Z1 axis sliding stage can adjust the position of the line scan camera along the Z-axis direction. Thus, the line scan camera can scan products at different positions. The R1 rotating seat can adjust the angle of the line scan camera around the Y-axis direction, which can ensure the imaging clarity of the line scan camera.

[0012] Furthermore, the line scan detection module also includes a line scan light source module, which includes an X2-axis sliding stage that slides along the X-axis on the detection frame; a Z2-axis sliding stage that slides along the Z-axis on the X2-axis sliding stage; an R2 rotating seat that is rotatably mounted on the Z2-axis sliding stage, with the rotation axis of the R2 rotating seat set along the Y-axis; and a line scan light source mounted on the R2 rotating seat and tilted to assist the line scan camera in detection.

[0013] Through the above technical solution, the X2 axis sliding stage can adjust the position of the line scan light source along the X-axis direction, and the Z2 axis sliding stage can adjust the position of the line scan light source along the Z-axis direction, thus enabling it to work with the line scan camera to adapt to scanning products in different positions; the R2 rotary table can adjust the angle of the line scan light source around the Y-axis direction, thus better working with the line scan camera to ensure the clarity of the line scan image.

[0014] Furthermore, the area array detection module includes an X3-axis sliding stage that slides along the X-axis direction on the detection frame; a Z3-axis sliding stage that slides along the Z-axis direction on the X3-axis sliding stage; and an area array camera that is mounted on the Z3-axis sliding stage.

[0015] Through the above technical solution, the X3-axis sliding stage can adjust the position of the area scan camera along the X-axis direction, and the Z3-axis sliding stage can adjust the position of the area scan camera along the Z-axis direction, thereby adapting to other features to be detected at different positions.

[0016] Furthermore, the area array detection module also includes an area array light source module, which includes a light source frame disposed on a support platform, on which a light source is placed; and a robotic arm disposed on the support platform, which is adapted to grasp the light source and place the light source below the area array camera.

[0017] With the above technical solution, when a light source is needed, the robotic arm grabs the corresponding light source and positions it below the area scan camera, improving the flexibility and accuracy of the area scan camera's detection. At the same time, the robotic arm also serves as a support structure for the light source, saving costs and installation space.

[0018] Furthermore, the light source frame is provided with a positioning pin, and the light source is provided with a positioning groove for the positioning pin to be inserted.

[0019] The above technical solution facilitates the limiting of the light source, while having a relatively simple structure and low cost.

[0020] Furthermore, the product axis module includes a sliding support platform disposed on a support platform along the Y-axis direction; a Y-axis sliding platform that slides along the Y-axis direction on the sliding support platform; an X4-axis sliding platform that slides along the X-axis direction on the Y-axis sliding platform; an R3 rotating seat that is rotatably disposed on the X4-axis sliding platform, with the rotation axis of the R3 rotating seat set along the X-axis direction; an R4 rotating seat that is rotatably disposed on an R1 rotating seat, with the rotation axis of the R4 rotating seat set along the Z-axis direction; and an R2 rotating seat suitable for fixing the product relatively.

[0021] Through the above technical solutions, the X4-axis sliding stage and the Y-axis sliding stage can move the product along the X and Y axes, thereby facilitating the adjustment of the product's position on the horizontal plane. The R3 rotary table can rotate the product around the X-axis, and the R4 rotary table can rotate the product around the Y-axis, thereby facilitating the adjustment of the product's state and allowing different parts of the product to be displayed in a better posture, thus facilitating inspection by line scan cameras and area scan cameras.

[0022] Secondly, this invention discloses a detection process.

[0023] A testing process, based on the aforementioned multi-dimensional intelligent AOI testing platform for flat panel products, includes the following steps:

[0024] Loading procedure: The operator places the flat product face up on the product axis module;

[0025] Frontal visual guidance steps: Use the visual guidance camera to capture the features of the flat panel and determine the actual relative positions of the line scan camera, area scan camera and the product;

[0026] Front area detection steps: The product axis module conveys the product to the detection position of the line scan camera, and the X4 axis sliding stage moves the product at a constant speed to output a front image;

[0027] Side area detection steps: The product is rotated by the R3 rotating base so that the side of the product faces upward. Then the line scan camera scans the side of the product once and outputs the side image.

[0028] Other front feature detection steps: The product axis module conveys the product to the area scan camera detection position, the robotic arm picks up the light source from the light source frame and moves it to the corresponding position below the area scan, and takes a picture and outputs the image;

[0029] Manual flipping steps: The R3 rotary table rotates the product until the front side is facing up. The Y-axis sliding table moves the product to the unloading station, and the operator flips the product so that the back side is facing up.

[0030] Negative visual guidance steps: Repeat the positive visual guidance steps;

[0031] Reverse area detection steps: Repeat the front area detection steps;

[0032] Other feature detection steps on the reverse side: Repeat the other feature detection steps on the front side;

[0033] Material unloading process: The Y-axis sliding table moves the product to the unloading station, where the operator unloads the product.

[0034] Furthermore, in the side area detection step, after the product's side faces upward, the X4 axis sliding stage moves the product along the X-axis. At this time, the line scan camera scans one side of the product. After scanning one side of the product, the R4 rotating seat drives the product to rotate, which is suitable for the line scan camera to scan the rounded corners of the product. At this time, the line scan camera and the line scan light source move synchronously, so that the light from the line scan camera is always tangent to the rounded corners. Then, the above steps are repeated until all single sides and rounded corners of the product's sidewalls are scanned and imaged.

[0035] Through the above technical solution, five-axis linkage is achieved by using the Z1-axis sliding stage, Z2-axis sliding stage, X4-axis sliding stage, R3 rotary table, and R4 rotary table, thereby realizing one-time imaging of the side of the product. This allows the plane and rounded corners of the product side to be output as images in a coherent manner, thus improving the detection effect and efficiency.

[0036] Furthermore, different light sources are selected based on different features, and the area scan camera is adjusted to the corresponding height. The above steps are repeated until images of all other features are output.

[0037] By employing the above technical solutions, appropriate light sources can be selected based on different features to be detected, thereby improving the flexibility and accuracy of area array camera detection.

[0038] The beneficial effects of this invention are:

[0039] 1. By changing the product's posture through the product axis module and transporting the product to the corresponding inspection station, accurate and comprehensive inspection can be achieved. This allows for comprehensive inspection of the product on a single platform, avoiding the reduction in accuracy caused by rotating the product on different devices and improving inspection accuracy. At the same time, each inspection area is integrated into the line scan inspection module and the area scan inspection module, improving the overall inspection efficiency.

[0040] 2. Five-axis linkage is achieved through the Z1-axis sliding stage, Z2-axis sliding stage, X4-axis sliding stage, R3 rotary table, and R4 rotary table, thereby realizing one-time imaging of the side of the product. This allows the plane and rounded corners of the side of the product to be output as images in a coherent manner, thus improving the detection effect and efficiency.

[0041] 3. Select the appropriate light source according to different features to be detected to improve the flexibility and accuracy of area scan camera detection. Attached Figure Description

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0043] Figure 1 This is a schematic diagram of the linear array scanning principle in the background technology.

[0044] Figure 2 A schematic diagram of the area array principle in the background art.

[0045] Figure 3 This is a schematic diagram illustrating the overall structure of the multi-dimensional intelligent AOI inspection platform for flat panel products in this invention.

[0046] Figure 4 This is a top view schematic diagram illustrating the overall structure of the multi-dimensional intelligent AOI inspection platform based on flat panel products in this invention.

[0047] Figure 5 This is a schematic diagram illustrating the area array detection module in this invention.

[0048] Figure 6 This is a schematic diagram illustrating the linear array detection module in this invention.

[0049] Figure 7 This is a schematic diagram illustrating the quick-release component in this invention.

[0050] Figure 8 This is a partial cross-sectional schematic diagram illustrating the rotating shaft and torsion spring in this invention.

[0051] Figure 9 This is a schematic diagram illustrating the light source frame support, light source, and positioning pin in this invention.

[0052] Figure 10 This is a schematic diagram illustrating the product axis module in this invention.

[0053] Figure 1 In the middle: 8. Linear scan camera; 81. Linear scan lens; 82. Linear scan light source; 83. Imaging point; 84. Plane to be measured.

[0054] Figure 2 In the diagram: 9. Area array camera; 91. Area array lens; 92. Area array light source; 93. Imaging point; 94. Plane to be measured.

[0055] Figure 3-10The components are as follows: 1. Support platform; 2. Line scan detection module; 21. Detection frame; 22. X1 axis sliding stage; 23. Z1 axis sliding stage; 24. R1 rotary seat; 25. Line scan camera; 26. Line scan light source module; 261. X2 axis sliding stage; 262. Z2 axis sliding stage; 263. R2 rotary seat; 264. Line scan light source; 3. Area scan detection module; 31. X3 axis sliding stage; 32. Z3 axis sliding stage; 33. Area scan camera; 34. Area scan light source module; 35. Light source frame; 351. Positioning pin; 36. Robotic arm; 37. Light source library bracket; 38. Light source; 39. Quick-release assembly; 391. Quick-release ring; 3911. Telescopic component; 3912. Moving disk; 392. Mounting cavity; 393. Rotating groove; 394. Rotating shaft; 395. Locking rod; 396. Torsion spring; 397. Connector; 3971. Positioning groove; 398. Quick-release cavity; 399. Annular slot; 4. Product axis module; 41. Sliding support table; 42. Y-axis sliding table; 43. X4-axis sliding table; 44. R3 rotary seat; 45. R4 rotary seat; 5. Line scan camera detection position; 6. Area scan camera detection position; 7. Unloading station. Detailed Implementation

[0056] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0057] In a first aspect, the present invention discloses a multi-dimensional intelligent AOI inspection platform for flat panel products.

[0058] Reference Figures 3 to 10 A multi-dimensional intelligent AOI inspection platform for tablet products includes a support platform 1. The support platform 1 is equipped with a visual guidance camera, a line scan detection module 2, an area scan detection module 3, and a product axis module 4. The product axis module 4 is adapted to change the product posture and transport the product sequentially through the detection areas of the visual guidance camera, the line scan detection module 2, and the area scan detection module 3.

[0059] During operation, the operator places the product on the product axis module 4. At this point, the product is positioned below the vision-guided camera, which captures the features of the flat panel to determine the actual relative positions of the line scan detection module 2, the area scan detection module 3, and the product. The product axis module 4 then conveys the product to the detection position of the line scan camera 25, i.e., the scanning area of ​​the line scan camera 25. The line scan camera 25 then scans the front and sides of the product and outputs the front and side images. Next, the product axis module 4 conveys the product to the detection position of the area scan camera 33, i.e., the scanning area of ​​the area scan camera 33. The area scan camera 33 captures other features on the product and outputs the images. Finally, the product axis module 4 conveys the product to the unloading station 7, where the operator unloads it.

[0060] The line scan detection module 2 includes a detection frame 21 and a line scan camera 25. The detection frame 21 is fixedly connected to the support platform 1. An X1-axis sliding stage 22 slides on the detection frame 21 along the X-axis direction, and a Z1-axis sliding stage 23 slides on the X1-axis sliding stage 22 along the Z-axis direction. An R1 rotating seat 24 is also rotatably mounted on the Z1-axis sliding stage 23. The rotation axis of the R1 rotating seat 24 is set along the Y-axis, meaning that the R1 rotating seat 24 can rotate around the Y-axis. The line scan camera 25 is fixedly connected to the R1 rotating seat 24 and is tilted towards the product axis module 4. The X1-axis sliding stage 22 can adjust the position of the line scan camera 25 along the X-axis direction, and the Z1-axis sliding stage 23 can adjust the position of the line scan camera 25 along the Z-axis direction, thereby enabling scanning of products at different positions. In this embodiment, the line scan camera 25 includes a line scan camera body and a line scan lens.

[0061] The line scan detection module 2 also includes a line scan light source module 26. The line scan light source module 26 includes an X2-axis sliding stage 261, a Z2-axis sliding stage 262, an R2 rotating seat 263, and a line scan light source 264. The X2-axis sliding stage 261 slides along the X-axis direction on the detection frame 21, and the Z2-axis sliding stage 262 slides along the Z-axis direction on the X2-axis sliding stage 261. The R2 rotating seat 263 is rotatably mounted on the Z2-axis sliding stage 262, and its rotation axis is set along the Y-axis, meaning the R2 rotating seat 263 can rotate around the Y-axis. The line scan light source 264 is fixedly connected to the R2 rotating seat 263 and is tilted towards the product axis module 4 to assist the line scan camera 25 in detection. The X2-axis sliding stage 261 can adjust the position of the line scan light source 264 along the X-axis, while the Z2-axis sliding stage 262 can adjust the position of the line scan light source 264 along the Z-axis, thus enabling it to work with the line scan camera 25 to scan products in different positions. The R1 rotary table 24 can adjust the angle of the line scan camera 25 around the Y-axis, and the R2 rotary table 263 can adjust the angle of the line scan light source 264 around the Y-axis, thereby ensuring the clarity of the line scan image.

[0062] The area array detection module 3 includes an X3-axis sliding stage 31, a Z3-axis sliding stage 32, and an area array camera 33. The X3-axis sliding stage 31 slides along the X-axis direction on the detection frame 21. The Z3-axis sliding stage 32 slides along the Z-axis direction on the X3-axis sliding stage 31, and the area array camera 33 is fixedly connected to the Z3-axis sliding stage 32. The X3-axis sliding stage 31 can adjust the position of the area array camera 33 along the X-axis direction, and the Z3-axis sliding stage 32 can adjust the position of the area array camera 33 along the Z-axis direction, thereby adapting to other features to be detected at different positions. In this embodiment, the area array camera 33 includes an area array camera 33 body and an area array lens.

[0063] The area array detection module 3 also includes an area array light source module 34, which includes a light source frame 35 and a robotic arm 36.

[0064] A light source library bracket 37 is fixedly connected to the support platform 1, and a light source frame 35 is fixedly connected to the light source library bracket 37. Multiple light sources 38 are placed on the light source frame 35. The light sources 38 are positioned on the light source frame 35 by limiting members. When a light source 38 is needed, a robotic arm 36 grasps the corresponding light source 38 and positions it below the area scan camera 33. At this time, the robotic arm 36 also serves as a support structure for the light source 38.

[0065] A robotic arm 36 is fixedly connected to the support platform 1. The robotic arm 36 is adapted to grasp the light source 38 and place the light source 38 below the area scan camera 33. The robotic arm 36 is a six-axis manipulator, and a quick-release assembly 39 is provided at the end of the robotic arm 36. The quick-release assembly 39 includes a quick-release ring 391, which is fixedly connected to the end of the robotic arm 36. The quick-release ring 391 has a mounting cavity 392 inside, and a rotating groove 393 is formed on the side wall of the mounting cavity 392. Multiple rotating grooves 393 are arranged in a circumferential array along the quick-release ring 391, and there are four in this embodiment. A rotating shaft 394 is fixedly connected to the rotating groove 393. A locking rod 395 is rotatably connected to the rotating shaft 394. A connector 397 is fixedly connected to the light source 38. The connector 397 has a quick-release cavity 398 for the quick-release ring 391 to be inserted into. An annular locking groove 399 for the locking rod 395 to be inserted into the side wall of the quick-release cavity 398. A telescopic component 3911 is also fixedly connected to the quick-release ring 391. The protruding end of the telescopic component 3911 extends into the mounting cavity 392 and is fixedly connected to the movable disk 3912 by bolts. When the output end of the telescopic component 3911 retracts, the movable disk 3912 pushes the locking rod 395 to rotate towards the telescopic component 3911 at one end facing the movable disk 3912, causing the other end of the locking rod 395 to rotate towards the outside of the quick-release ring 391. This allows the locking rod 395 to insert into the locking slot, and the four locking rods 395 together press against the side wall of the annular locking slot 399, making the quick-release ring 391 firmly connected to the connector 397, thereby enabling the robotic arm 36 to stably grasp the light source 38. The telescopic component 3911 can be either a telescopic component 3911 or an electric push rod.

[0066] A torsion spring 396 is fitted on the rotating shaft 394. One end of the torsion spring 396 is connected to the locking rod 395, and the other end is connected to the rotating groove 393. The torsion spring 396 applies a torque to the locking rod 395, causing the end of the locking rod 395 close to the moving disk 3912 to rotate toward the moving disk 3912. As a result, when the output end of the telescopic member 3911 is retracted to the extended state, the end of the locking rod 395 away from the moving disk 3912 is retracted into the rotating groove 393, thereby allowing the quick-release ring 391 to separate from the connector 397.

[0067] The limiting component includes a positioning pin 351, and the connector 397 is provided with a positioning groove 3971 for the positioning pin 351 to be inserted. By placing the connector 397 on the light source frame 35 and positioning the positioning pin 351 within the positioning groove 3971, the light source 38 can be limited. Each connector 397 is limited by at least one positioning pin 351; in this embodiment, two pins are used to ensure that the light source 38 can be stably limited.

[0068] Product axis module 4 includes a sliding support platform 41, a Y-axis support platform, an X4-axis sliding platform 43, an R3 rotary seat 44, and an R4 rotary seat 45. The sliding support platform 41 is arranged along the Y-axis direction and is fixedly connected to the support platform 1. The Y-axis sliding platform 42 slides along the Y-axis direction on the sliding support platform 41, and the X4-axis sliding platform 43 slides along the X-axis direction on the Y-axis sliding platform 42. The R3 rotary seat 44 is rotatably mounted on the X4-axis sliding platform 43, and its rotation axis is set along the X-axis direction, meaning the R3 rotary seat 44 can rotate around the X-axis. The R4 rotary seat 45 is rotatably mounted on the R1 rotary seat 24, and its rotation axis is set along the Z-axis direction, meaning the R4 rotary seat 45 can rotate around the Z-axis. The R4 rotary seat 45 is equipped with an adsorption element, which can be a magnet or a suction cup, suitable for fixing the product relatively on the R4 rotary seat 45. The X4-axis sliding stage 43 and the Y-axis sliding stage 42 can move the product along the X and Y axes, thus facilitating the adjustment of the product's position on the horizontal plane. The R3 rotary table 44 can rotate the product around the X-axis, and the R4 rotary table 45 can rotate the product around the Y-axis, thus facilitating the adjustment of the product's state and allowing different parts of the product to be displayed in a better posture, thereby facilitating the detection by the line scan camera 25 and the area scan camera 33.

[0069] In the above scheme, the X1 axis sliding stage 22 and the like all use a lead screw structure, electric push rod structure, cylinder structure, linear module or gear rack structure to achieve linear motion, while the R1 rotary seat 24 and the like all use a rotary cylinder or motor to achieve rotary motion. When using a motor, a harmonic reducer can be used in conjunction.

[0070] Working principle: The operator places the product on the R4 rotating seat 45, and then the Y-axis sliding stage 42 moves along the Y-axis so that the product is located below the visual guidance camera. The visual guidance camera captures the features of the flat panel and determines the actual relative position of the line scan camera 25, the area scan camera 33 and the product.

[0071] The product is then conveyed to the detection position of the line scan camera 25 via the Y-axis sliding stage 42 and the X4-axis sliding stage 43, which is the scanning area of ​​the line scan camera 25. At this time, the X4-axis sliding stage 43 moves the product at a constant speed, while the line scan camera 25 continuously scans, ultimately outputting an image of the product surface. If the product is large and located on a horizontal plane, after the X4-axis sliding stage 43 completes one line scan with the product, the Y-axis sliding stage 42 moves the product a certain distance, and then the X-axis sliding stage 43 performs another line scan with the product, repeating the above steps until the entire front of the product has been scanned. The distance that the Y-axis sliding stage 42 moves with the product does not exceed the line scan width of the line scan camera 25.

[0072] Then, the R3 rotary table 44 rotates the product around the X-axis, so that one side of the product faces upwards. Subsequently, the X4 axis sliding stage 43 moves the product along the X-axis, and the line scan camera 25 continues scanning. When the scan of this single side is complete and a rounded corner of the product is about to be scanned, the R4 rotary table 45 rotates the product around the Y-axis, while the Z1 axis sliding stage 23 and the Z2 axis sliding stage 262 respectively move the line scan camera 25 and the line scan light source 264 along the Z-axis, ensuring that the line scan camera 25 and the scanning area are always located on the rounded corner surface of the product, thus ensuring the scanning effect. After the rounded corner is scanned, the scanning of subsequent single sides and rounded corners of the product continues until the entire side of the product is scanned, finally outputting the product side image. Five-axis linkage is achieved through the Z1-axis sliding stage 23, Z2-axis sliding stage 262, X4-axis sliding stage 43, R3 rotary seat 44, and R4 rotary seat 45, enabling single-pass imaging of the product's side surface. This allows for the simultaneous and continuous output of images of the product's side plane and rounded corners, thereby improving inspection effectiveness and efficiency. Because the product's rounded corners and the rotation center of the R4 rotary seat 45 are not on the same axis, the maximum height of the product's rounded corners gradually increases and then gradually decreases during rotation. Similarly, the heights of the line scan camera 25 and the line scan light source 264 also gradually increase and then gradually decrease to ensure effective line scanning.

[0073] Next, the Y-axis sliding stage 42 transports the product to the detection position of the area scan camera 33, which is the scanning area of ​​the area scan camera 33. At this time, the robotic arm 36 uses a quick-connect assembly to grab the light source 38 corresponding to the feature to be detected and places the light source 38 between the area scan camera 33 and the product. The area scan camera 33 then captures the feature to be detected on the product and outputs the image. If there are multiple features to be detected, the product state is adjusted using the X4-axis sliding stage 43, R3 rotary table 44, R4 rotary table 45, and Y-axis sliding stage 42 to ensure that the feature to be detected is located at the detection position of the area scan camera 33. Simultaneously, the robotic arm 36 changes the corresponding light source 38 according to the corresponding feature until all features to be detected have been captured.

[0074] Finally, the Y-axis sliding table 42 transports the product to the unloading station 7, where the operator unloads it.

[0075] Secondly, this invention discloses a detection process.

[0076] A testing process, based on the aforementioned multi-dimensional intelligent AOI testing platform for flat panel products, includes the following steps:

[0077] Loading procedure: The operator places the flat product face up on the R2 rotating seat 263;

[0078] Frontal visual guidance steps: Use the visual guidance camera to capture the features of the tablet, determine the actual relative positions of the line scan camera 25, the area scan camera 33 and the product, and adjust the product to the appropriate position.

[0079] Frontal Area Detection Steps: The imaging area of ​​the line scan camera 25 forms a scan line, the length of which is the line scan width of the line scan camera 25. The product is conveyed to the detection position of the line scan camera 25 via the Y-axis sliding stage 42 and the X4-axis sliding stage 43. At this point, the line scan camera 25 begins scanning, while the X4-axis sliding stage 43 moves the product at a constant speed. The front of the product passes through the scan line formed by the scanning area of ​​the line scan camera 25, allowing the line scan camera 25 to complete the scan of the front of the product and output a frontal image. If the product is large and located on a horizontal plane, after the X4-axis sliding stage 43 completes one line scan with the product, the Y-axis sliding stage 42 moves the product a certain distance, and then the X-axis sliding stage 43 performs another line scan with the product. This process is repeated until the entire front of the product has been scanned. The distance that the Y-axis sliding stage 42 moves with the product does not exceed the line scan width of the line scan camera 25.

[0080] Side area detection steps: The R3 rotary table 44 rotates the product around the X-axis, so that one side of the product faces upward. Then, the X4 axis sliding stage 43 moves the product along the X-axis, and the line scan camera 25 continues to scan. When the scan of this single side is completed and a rounded corner of the product is about to be scanned, the R4 rotary table 45 rotates the product around the Y-axis, while the Z1 axis sliding stage 23 and the Z2 axis sliding stage 262 respectively move the line scan camera 25 and the line scan light source 264 along the Z-axis. The X4 axis sliding stage 43 moves the product along the X-axis, ensuring that the scan line of the line scan camera 25 moves continuously and uniformly along the rounded corner surface, so that the entire rounded corner surface passes through the scan line of the line scan camera 25, so as to output a complete image of the rounded corner surface, thereby ensuring the scanning effect. After the rounded corner is scanned, the scan of the subsequent single sides and rounded corners of the product continues until the entire side of the product is scanned, and finally the side image of the product is output.

[0081] Other front-facing feature detection steps: The Y-axis sliding stage 42 transports the product so that the feature to be detected is located at the detection position of the area scan camera 33, i.e., the scanning area of ​​the area scan camera 33. At this time, the robotic arm 36 uses a quick-connect assembly to grab the light source 38 corresponding to the feature to be detected and places the light source 38 between the area scan camera 33 and the product. The area scan camera 33 then captures the feature to be detected on the product and outputs the image. If there are multiple features to be detected, the product state is adjusted using the X4-axis sliding stage 43, R3 rotary table 44, R4 rotary table 45, Y-axis sliding stage 42, etc., so that the feature to be detected on the front or side of the product is located at the detection position of the area scan camera 33. At the same time, the robotic arm 36 changes the corresponding light source 38 according to the corresponding feature until all features to be detected have been captured.

[0082] Manual flipping steps: The R3 rotary seat 44 rotates the product until the front side is facing up, and the Y-axis sliding table 42 moves the product to the unloading station 7. The operator flips the product so that the back side is facing up.

[0083] Reverse visual guidance steps: The Y-axis slide stage 42 then transports the product to below the visual guidance camera, and then the front visual guidance steps are repeated;

[0084] Reverse area detection step: Repeat the front area detection step to output the reverse image of the product;

[0085] Other feature detection steps on the reverse side: Repeat the other feature detection steps on the front side to output the image of the features to be detected on the reverse side of the product;

[0086] Unloading steps: The Y-axis sliding table 42 moves the product to the unloading station 7, where the operator unloads the product.

[0087] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A multi-dimensional intelligent AOI inspection platform for flat panel products, characterized in that, include Support platform (1); The line scan detection module (2) is located on the support platform (1) and is suitable for detecting the front, back and side of the product; The area array detection module (3) is located on the support platform (1) and is suitable for detecting other features of the product; A vision-guided camera, mounted on a support platform (1), is suitable for determining the position of the product relative to the line scan detection module (2) and the area scan detection module (3); The product axis module (4) is located on the support platform (1). The product axis module (4) is adapted to change the product posture and transport the product through the detection areas of the visual guidance camera, the line scan detection module (2) and the area array detection module (3) in sequence. The line scan detection module (2) includes The testing frame (21) is mounted on the support platform (1); The X1 axis sliding stage (22) slides along the X-axis direction on the inspection frame (21); The Z1 axis sliding stage (23) slides along the Z-axis direction on the X1 axis sliding stage (22); The R1 rotary seat (24) is rotatably mounted on the Z1 axis sliding stage (23), and the rotation axis of the R1 rotary seat (24) is set along the Y axis. A line scan camera (25) is mounted on a rotating base (24) of R1 and is tilted. The line scan detection module (2) further includes a line scan light source module (26), the line scan light source module (26) including... The X2 axis sliding stage (261) slides along the X-axis on the inspection frame (21); The Z2 axis sliding stage (262) slides along the Z-axis direction on the X2 axis sliding stage (261); The R2 rotary seat (263) is rotatably mounted on the Z2 axis sliding stage (262), and the rotation axis of the R2 rotary seat (263) is set along the Y axis; A line scan light source (264) is mounted on the R2 rotating base (263) and is tilted to assist the line scan camera (25) in detection; The product axis module (4) includes A sliding support platform (41) is provided on the support platform (1) along the Y-axis direction; The Y-axis sliding stage (42) slides along the Y-axis direction on the sliding support stage (41); The X4 axis sliding stage (43) slides along the X-axis direction on the Y-axis sliding stage (42); The R3 rotary seat (44) is rotatably mounted on the X4 axis sliding stage (43), and the rotation axis of the R3 rotary seat (44) is set along the X-axis direction; The R4 rotating seat (45) is rotatably mounted on the R3 rotating seat (44). The rotation axis of the R4 rotating seat (45) is set along the Z-axis direction. The R4 rotating seat (45) is suitable for fixing the product relatively.

2. The multi-dimensional intelligent AOI inspection platform for flat panel products as described in claim 1, characterized in that, The area array detection module (3) includes The X3 axis sliding stage (31) slides along the X-axis on the inspection frame (21); The Z3 axis sliding stage (32) slides along the Z-axis direction on the X3 axis sliding stage (31); A field-array camera (33) is mounted on a Z3-axis sliding stage (32).

3. The multi-dimensional intelligent AOI inspection platform for flat panel products as described in claim 2, characterized in that, The area array detection module (3) further includes an area array light source module (34), the area array light source module (34) including A light source frame (35) is provided on a support platform (1), and a light source (38) is placed on the light source frame (35); A robotic arm (36) is mounted on a support platform (1). The robotic arm (36) is adapted to grasp a light source (38) and place the light source (38) below the area array camera (33).

4. The multi-dimensional intelligent AOI inspection platform for flat panel products as described in claim 3, characterized in that, The light source frame (35) is provided with a positioning pin (351), and the light source (38) is provided with a positioning groove (3971) for the positioning pin (351) to be inserted.

5. A testing process, based on the multi-dimensional intelligent AOI testing platform for flat panel products as described in claim 4, characterized in that, Includes the following steps: Loading steps: The operator places the flat product face up on the product shaft module (4); Frontal visual guidance steps: Use the visual guidance camera to capture the features of the flat panel and determine the actual relative positions of the line scan camera (25), the area scan camera (33) and the product; Front area detection steps: The product axis module (4) transports the product to the detection position of the line scan camera (25), and moves the product at a constant speed through the X4 axis sliding stage (43) to output a front image; Side area detection steps: The product is rotated by the R3 rotating seat (44) so ​​that the side of the product faces upward. Then the line scan camera (25) scans the side of the product once and outputs the side image. Other front feature detection steps: The product axis module (4) transports the product to the detection position of the area array camera (33), and the robotic arm (36) takes the light source (38) from the light source frame (35) to the corresponding position below the area array, and takes a picture to output the image; Manual flipping steps: The R3 rotary table (44) rotates the product to face up, and the Y-axis sliding table (42) moves the product to the unloading station (7). The operator flips the product so that the reverse side faces up. Negative visual guidance steps: Repeat the positive visual guidance steps; Reverse area detection steps: Repeat the front area detection steps; Other feature detection steps on the reverse side: Repeat the other feature detection steps on the front side; Unloading steps: The Y-axis sliding table (42) moves the product to the unloading station (7), and the operator unloads the product.

6. The detection process as described in claim 5, characterized in that, In the side area detection step, after the product side faces upward, the X4 axis sliding stage (43) moves the product along the X-axis. At this time, the line scan camera (25) scans one side of the product side. After the scanning of one side of the product side is completed, the R4 rotating seat (45) drives the product to rotate, which is suitable for the line scan camera (25) to scan the rounded corner of the product. At this time, the line scan camera (25) and the line scan light source (264) move synchronously, so that the scanning area of ​​the line scan camera (25) is always located on the rounded corner surface during the rotation of the product rounded corner. Then the above steps are repeated until all single sides and rounded corners of the product sidewall are scanned and imaged.

7. The detection process as described in claim 5, characterized in that, In the other frontal feature detection steps, different light sources (38) are selected according to different features, and the area array camera (33) is adjusted to the corresponding height. The above steps are repeated until images of all other features are output.

Images