A substandard product screening system based on high-precision visual camera detection

Abstract

This invention relates to the field of defective product screening technology, specifically to a defective product screening system based on high-precision vision camera inspection. The system includes: a product conveying module, comprising product conveying equipment; an image acquisition module connected to the product conveying module, comprising multiple camera imaging devices; each camera imaging device being equipped with a light source uniformity element; an image analysis module electrically connected to the image acquisition module, comprising an image processing computer; and a product sorting module electrically connected to the image analysis module. This invention, by incorporating light source uniformity elements on the lighting lamps, ensures uniform illumination of the inspected workpiece, preventing excessive shadows and reducing light reflection, thereby improving the image capture effect of the vision camera and ensuring the accuracy of defective product screening.

Description

Technical Field

[0001] This invention relates to the field of defective product screening technology, specifically a defective product screening system based on high-precision visual camera detection. Background Technology

[0002] After the workpieces are manufactured, they usually need to be screened to remove defective products. In order to solve the problem that manual visual inspection of defective products is inefficient and prone to misjudgment, visual camera defective product screening equipment is used in the market to screen defective workpieces.

[0003] Existing visual camera-based defective product screening equipment typically uses a visual camera to capture images of the workpiece surface details, and then uses image processing software, algorithms, and parameter settings for specific applications to screen for defective products. However, the visual cameras used to capture workpiece images usually have a limited range of adjustment and cannot be applied to different workpieces, resulting in low flexibility and practicality. Furthermore, the light source used in existing visual camera-based defective product screening equipment directly illuminates the workpiece. However, some workpiece surfaces have high reflectivity, and direct illumination can easily lead to strong light reflection, preventing the light from being evenly concentrated on the workpiece surface. This results in overly bright captured images. Conversely, some workpiece surfaces have low reflectivity, and light may be absorbed, easily creating excessive shadows, leading to overly dark images. Ultimately, this affects the image capture effect of the visual camera and reduces the accuracy of defective product screening. Therefore, we propose a defective product screening system based on high-precision visual camera inspection. Summary of the Invention

[0004] To overcome the above shortcomings, this invention provides a defective product screening system based on a high-precision vision camera. This addresses the limitations of existing vision cameras used for capturing workpiece images, which have a limited range of adjustment and cannot be applied to different workpieces, resulting in low flexibility and practicality. Furthermore, the light sources used in existing vision camera defective product screening equipment directly illuminate the workpiece. However, some workpiece surfaces have high reflectivity, and direct illumination easily leads to strong light reflection, preventing the light from being evenly concentrated on the workpiece surface. This results in overly bright captured images. Conversely, some workpiece surfaces have low reflectivity, where light may be absorbed, easily creating excessive shadows and leading to overly dark images. Ultimately, these shortcomings affect the image capture effect of the vision camera and reduce the accuracy of defective product screening.

[0005] The technical solution of this invention is:

[0006] A defective product screening system based on high-precision visual camera detection includes:

[0007] The product conveying module includes product conveying equipment for guiding the conveying of production workpieces;

[0008] An image acquisition module is connected to the product conveying module, and the image acquisition module includes multiple camera capturing devices for acquiring images of the conveyed workpiece;

[0009] Each of the aforementioned camera shooting devices is provided with a light source uniformity component for uniform light distribution in each of the aforementioned camera shooting devices;

[0010] An image analysis module is electrically connected to the image acquisition module, and the image analysis module includes an image processing computer for analyzing and judging images acquired from the workpiece.

[0011] The product sorting module is electrically connected to the image analysis module, and the product sorting module includes two sorting devices for sorting defective workpieces.

[0012] Preferably, the product conveying equipment includes:

[0013] The machine base has four fixed brackets on its upper part. A top plate is fixedly connected to the top of the four fixed brackets. The bottom of the top plate is fixedly connected to the top of the image processing computer. A conveyor plate is provided directly below the top plate. A rotating shaft is fixedly connected to the bottom of the conveyor plate. The bottom of the rotating shaft is rotatably connected to the machine base. A first power source is provided at the bottom of the rotating shaft to drive its rotation.

[0014] Preferably, the plurality of camera shooting devices are arranged at different angles around the conveyor tray, and each camera shooting device includes:

[0015] The mounting frame has a groove on the side near the conveyor tray. A bidirectional screw is rotatably connected in the groove. One end of the bidirectional screw is provided with a second power source to drive its rotation. The bidirectional screw is provided with two sections of threads in opposite directions, and slider one and slider two are respectively threaded to the two sections of threads.

[0016] Preferably, the ends of slider one and slider two connected to the bidirectional screw are slidably connected in the groove, and the ends of slider one and slider two away from the bidirectional screw connection are respectively provided with extension groove one and extension groove two, and the upper surfaces of slider one and slider two are respectively provided with moving groove one and moving groove two.

[0017] Preferably, extension block 1 and extension block 2 are slidably connected in extension groove 1 and extension groove 2 respectively, and a vision camera and a lighting lamp are fixedly connected to the ends of extension block 1 and extension block 2 away from extension groove 1 and extension groove 2 respectively, and the vision camera and the lighting lamp are kept facing each other.

[0018] Preferably, a movable block 1 and a movable block 2 are fixedly installed above the extension block 1 and the extension block 2, respectively. The movable block 1 and the movable block 2 are slidably connected in the movable groove 1 and the movable groove 2, respectively. A third power source and a fourth power source for driving the movement are respectively provided at one end of the movable block 1 and the movable block 2.

[0019] Preferably, the first movable block and the second movable block are respectively provided with two symmetrical guide rods and two symmetrical guide rods. The first movable block and the second movable block are slidably sleeved on the two guide rods and the two guide rods, respectively. The two guide rods and the two guide rods are respectively fixedly connected in the first movable groove and the second movable groove.

[0020] Preferably, each of the light source uniform components consists of a diffuser and an adjustment component. The diffuser is placed on the lighting lamp and has a multi-layer design. The surface of the diffuser is uneven and an anti-reflective film is bonded to it. A light guide is fixedly installed inside the diffuser on the side closest to the lighting lamp.

[0021] Preferably, the two sorting devices are arranged at different angles around the conveyor tray and are far away from the multiple camera shooting devices. Each sorting device includes:

[0022] The bracket is fixedly installed on the machine base, and a cross frame is fixedly installed on the upper side of the bracket near the conveyor tray. A through groove is opened on the cross frame, and a movable block three is slidably connected in the through groove. The bottom of the movable block three extends out of the through groove and is fixedly connected to a support seat. An air-blowing sorting machine is fixedly installed on one side of the support seat.

[0023] Preferably, the upper end of the movable block three extends above the through slot and is threadedly connected to an adjusting screw. Both ends of the adjusting screw pass through the upper end of the movable block three and are rotatably connected to the bracket and the crossbar, respectively. One end of the adjusting screw is provided with a fifth power source to drive its rotation.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. By setting up a product conveying device, multiple camera shooting devices, an image processing computer, and two sorting devices, this invention can capture images of workpieces of different shapes from multiple angles, and detect and analyze the surface details of different workpieces, ensuring the accuracy of detection and screening, and improving the flexibility and practicality of screening.

[0026] 2. This invention, by equipping the lighting lamps of multiple camera imaging devices with uniform light source components, not only ensures that light is evenly illuminating the workpiece being inspected, preventing excessive shadows and reducing light reflection, thereby improving the image capture effect of the vision camera and ensuring the accuracy of defective workpiece screening, but also increases light transmittance, ensuring illumination effect. This enables the vision camera to obtain better image quality and clarity, further improving the accuracy of image processing and analysis, and accelerating screening efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a cross-sectional view of the overall structure of the present invention (right view).

[0029] Figure 3 This is a schematic diagram of the product conveying equipment of the present invention;

[0030] Figure 4 This is a cross-sectional view of the camera shooting device of the present invention;

[0031] Figure 5 This is a cross-sectional view of the slider of the present invention;

[0032] Figure 6 This is a two-section view of the slider of the present invention;

[0033] Figure 7 This is a schematic diagram of the light source uniformity component structure of the present invention;

[0034] Figure 8 This is a cross-sectional view of the light source uniform component of the present invention (without a diffuser).

[0035] Figure 9 This is an exploded view of the diffuser of the present invention;

[0036] Figure 10 This is a schematic diagram of the sorting equipment of the present invention.

[0037] In the diagram: 1. Product conveying equipment; 11. Base; 12. Fixing frame; 13. Top plate; 14. Conveyor plate; 15. Rotating shaft;

[0038] 2. Camera shooting equipment; 21. Mounting bracket; 22. Bidirectional screw; 23. Slider 1; 231. Extension block 1; 232. Moving block 1; 233. Guide rod 1; 234. Cylinder 1; 24. Vision camera; 25. Slider 2; 251. Extension block 2; 252. Moving block 2; 253. Guide rod 2; 254. Cylinder 2; 26. Illumination lamp; 261. Light source uniformity component; 2611. Mounting plate; 26111. Connecting shaft; 26112. Worm gear; 26113. Worm wheel; 26114. Lifting frame; 26115. Connecting frame; 26116. Limiting block; 26117. Limiting rod; 2612. Diffuser; 26121. Anti-reflective coating; 26122. Light guide tube;

[0039] 3. Image processing computer;

[0040] 4. Sorting equipment; 41. Support frame; 42. Cross frame; 43. Moving block three; 44. Support seat; 45. Air-blowing sorter; 46. Adjusting screw. Detailed Implementation

[0041] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element 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 this invention.

[0043] Please see Figure 1-10 The present invention will describe the above technical solution in detail through the following embodiments:

[0044] A defective product screening system based on high-precision visual camera detection includes:

[0045] The product conveying module includes a product conveying device 1, which is used to guide the conveying of production workpieces. The product conveying device 1 includes a base 11, with fixed frames 12 fixedly installed on all four sides of the base 11. A top plate 13 is fixedly connected to the top of the four fixed frames 12. The bottom of the top plate 13 is fixedly connected to the top of the image processing computer 3. A conveying plate 14 is provided directly below the top plate 13. A rotating shaft 15 is fixedly connected to the bottom of the conveying plate 14. The bottom of the rotating shaft 15 is rotatably connected to the base 11, and a first power source for driving its rotation is provided at the bottom of the rotating shaft 15.

[0046] It should be noted that the first power source is a slow-speed motor, which is fixedly installed inside the base 11, and the output shaft of the slow-speed motor is fixedly connected to the bottom of the rotating shaft 15.

[0047] It should also be noted that a vibratory feeder is installed on the side of the conveyor plate 14 where the camera shooting device 2 and the sorting device 4 are not installed. The workpieces are evenly fed onto the conveyor plate 14 by the vibratory feeder for sequential screening of defective products.

[0048] In this embodiment, after the workpiece is uniformly fed onto the conveyor plate 14 by the vibratory feeder, the slow motor, under the connection of the rotating shaft 15, can stably drive the uniformly arranged workpieces on the conveyor plate 14 to rotate sequentially to multiple camera shooting devices 2 and two sorting devices 4, so as to facilitate image acquisition, analysis and judgment and sorting of each workpiece.

[0049] An image acquisition module is connected to the product conveying module and includes multiple camera capturing devices 2 for acquiring images of the conveyed workpieces. The multiple camera capturing devices 2 are arranged at different angles around the conveyor tray 14. Each camera capturing device 2 includes a mounting frame 21. A groove is formed on the side of the mounting frame 21 closest to the conveyor tray 14. A bidirectional screw 22 is rotatably connected within the groove. One end of the bidirectional screw 22 is provided with a second power source to drive its rotation. The bidirectional screw 22 has two sections of threads in opposite directions, and slider 1 23 and slider 2 25 are threadedly connected to these two sections of threads, respectively. The ends of slider 1 23 and slider 2 25 connected to the bidirectional screw 22 are slidably connected within the groove. Extension groove 1 and extension groove 2 are formed on the ends of slider 1 23 and slider 2 25 away from the bidirectional screw 22, respectively. Moving groove 1 and moving groove 2 are formed on the upper surfaces of slider 1 23 and slider 2 25, respectively. Extension blocks are slidably connected within extension groove 1 and extension groove 2, respectively. A vision camera 24 and an illumination lamp 26 are fixedly connected to the ends of extension blocks 231 and 251 away from the ends connected to extension slots 1 and 2, respectively. The vision camera 24 and the illumination lamp 26 are aligned. Movable blocks 232 and 252 are fixedly installed above extension blocks 231 and 251, respectively. Movable blocks 232 and 252 are slidably connected to the movable slots 1 and 2, respectively. One end of the second movable block 252 is respectively provided with a third power source and a fourth power source to drive its movement. The first movable block 232 and the second movable block 252 are respectively provided with two symmetrical guide rods 1 233 and two symmetrical guide rods 253. The first movable block 232 and the second movable block 252 are respectively slidably sleeved on the two guide rods 1 233 and the two guide rods 253. The two guide rods 1 233 and the two guide rods 253 are respectively fixedly connected to the first movable groove and the second movable groove.

[0050] It is worth noting that each of the mounting brackets 21 for multiple camera shooting devices 2 is fixedly connected to a mounting base, which can be fixedly connected to the base 11 or the top plate 13 depending on the installation position of the multiple camera shooting devices 2.

[0051] It is also worth noting that the second power source, servo motor one, is fixedly installed on one side of the slide groove, and the output shaft of servo motor one is fixedly connected to one end of the bidirectional screw 22; the third power source and the fourth power source are cylinder one 234 and cylinder two 254, respectively. Cylinder one 234 and cylinder two 254 are fixedly installed on one side of the moving groove one and the moving groove two, respectively, and the piston rods of cylinder one 234 and cylinder two 254 are fixedly connected to the sides of moving block one 232 and moving block two 252, respectively.

[0052] In this embodiment, by arranging multiple camera imaging devices 2 at different angles around the conveyor tray 14, the vision cameras 24 on the multiple camera imaging devices 2 can capture images of each workpiece on the conveyor tray 14 from multiple angles, facilitating better detection and analysis of workpiece surface details and improving the accuracy of detection and screening. When using the multiple camera imaging devices 2, the workpiece can first be placed at the field of view of the vision cameras 24 of the multiple camera imaging devices 2. Then, based on the focusing of each vision camera 24 and the workpiece, the corresponding servo motor is activated to drive the bidirectional screw 22 connected to it to rotate. Since the bidirectional screw 22 has two sections of threads in opposite directions, and these two sections of threads are respectively threaded to slider 1 23 and slider 2 25, when the corresponding bidirectional screw 22 rotates, the slider 1 23 and slider 2 25 connected to it will drive the vision camera 24 and the lighting lamp 26 to move in opposite directions. This allows the vision camera 24 to better focus on the workpiece surface, ensuring clear images and preventing excessive distance between the vision camera 24, the lighting lamp 26, and the workpiece, which could cause blurry or out-of-focus images and affect the accuracy of image processing and analysis. Simultaneously, depending on the position of the workpiece on the conveyor plate 14, multiple camera devices 2 can activate cylinders 234 and 254. Guided by guide rods 233 and 253 respectively, cylinders 234 and 254 can stably push extension blocks 231 and 251 connected to moving blocks 232 and 252 to extend or retract. This allows extension blocks 231 and 251 to indirectly adjust the installation positions of the vision camera 24 and the lighting lamp 26, ensuring they can be aligned with different workpiece surfaces, thus improving their flexibility and practicality.

[0053] Each camera shooting device 2 is equipped with a light source uniformity component 261 for uniform light distribution in each camera shooting device 2. Each light source uniformity component 261 consists of a diffuser 2612 and an adjustment component. The diffuser 2612 is placed on the lighting lamp 26. The diffuser 2612 has a multi-layer design and a concave-convex surface. An anti-reflective film 26121 is adhered to the diffuser 2612. A light guide 26122 is fixedly installed inside the diffuser 2612 on the side closest to the lighting lamp 26.

[0054] It should be further explained that each adjusting component includes two symmetrical connecting brackets 26115. The two connecting brackets 26115 are respectively fixedly connected to both sides of the lampshade-unconnected movable block 252 on the lighting lamp 26. Each of the two connecting brackets 26115 has a lifting groove on its upper part, and a limit groove is provided on the side of each connecting bracket 26115 away from the lighting lamp 26. A lifting frame 26114 is slidably connected within each of the two lifting grooves. A cylinder 3 is installed at the bottom of each of the two lifting frames 26114. The three cylinders are respectively fixedly connected to the bottom of the two lifting slots, and the piston rods of the two cylinders are respectively fixedly connected to the two lifting frames 26114. Limit blocks 26116 are fixedly connected to the surfaces of the two lifting frames 26114. The two limit blocks 26116 are slidably connected to the two limit slots, and each of the two limit blocks 26116 is provided with a limit rod 26117. The two limit blocks 26116 are slidably sleeved on the two limit rods 26117, and the two limit rods 26117 are respectively fixed. Installed in two limiting slots, the upper ends of two lifting frames 26114 pass through the lifting slots and are rotatably connected to connecting shafts 26111. At the ends of the two connecting shafts 26111 that are close to each other, a mounting plate 2611 is fixedly connected between them. The mounting plate 2611 is positioned above the lighting lamp 26, and a mounting hole is provided in the middle of the mounting plate 2611. The bottom edge of the diffuser 2612 is fixedly connected to the edge of the mounting hole. A worm gear 26113 is fixedly connected to one of the connecting shafts 26111. A worm gear 26112 is engaged on one side of 26113. Both worm gears 26112 and worm gear 26112 are rotatably connected to the upper end of the lifting frame 26114 connected by the connecting shaft 26111. A servo motor 2 is provided at one end of the worm gear 26112. The servo motor 2 is fixedly installed on the upper end of the lifting frame 26114 connected by the connecting shaft 26111. The output shaft of the servo motor 2 extends into the lifting frame 26114 connected by the connecting shaft 26111 and is fixedly connected to the worm gear 26112.

[0055] In this embodiment, by providing a diffuser 2612 on the surface of the illumination lamp 26 on each camera capturing device 2, the light from the illumination lamp 26 can be more uniformly illuminated on the workpiece, reducing shadows and reflections, and improving the image quality captured by the vision camera 24. Simultaneously, the diffuser 2612 has a multi-layered design and an uneven surface, which further reduces light reflection and refraction, ensuring light uniformity. Furthermore, an anti-reflection film 26121 is provided on the surface of the diffuser 2612, effectively improving transmittance and ensuring illumination effect. This allows the vision camera 24 to obtain better image quality and clarity, further improving the accuracy of image processing and analysis. A light guide 26122 is provided inside the diffuser 2612 near the illumination lamp 26. The light guide 26122 guides and concentrates light, reducing energy loss and ensuring light transmission and illumination effect of the illumination lamp 26, improving the acquisition quality of the vision camera 24. When using the illumination lamp 26, two cylinders can be activated according to the light intensity. At this time, the two cylinders... Under the guidance of the limiting rod 26117 and the limiting block 26116, the three-phase system stably pushes the two lifting frames 26114 to rise or fall. The two lifting frames 26114, connected by the mounting plate 2611, can synchronously drive the diffuser 2612 to rise or fall. This allows adjustment of the distance between the diffuser 2612 and the lighting lamp 26, maintaining an appropriate distance to achieve a better uniform light dispersion effect. Simultaneously, the second servo motor can be activated. The second machine drives the worm gear 26112 connected to it to rotate. Since the worm gear 26112 and the worm wheel 26113 on the corresponding connecting shaft 26111 mesh with each other, when the worm gear 26112 rotates, the two connecting shafts 26111 will drive the diffuser 2612 connected to the mounting plate 2611 to rotate at different angles. This allows the light from the lighting lamp 26 to be focused on the surface of workpieces of different shapes, preventing the generation of too many shadows and affecting the image capture effect of the vision camera 24, thereby improving the accuracy of workpiece defect screening.

[0056] The image analysis module is electrically connected to the image acquisition module, and includes an image processing computer 3 for analyzing and judging the images acquired from the workpiece.

[0057] In this embodiment, by setting up an image processing computer 3, it can quickly process the image data captured by the vision cameras 24 on multiple camera shooting devices 2, and perform real-time image processing and analysis, thereby enabling rapid detection and identification of whether the conveyed workpiece is a defective product, making the defective product screening highly accurate and reliable.

[0058] The product sorting module is electrically connected to the image analysis module and includes two sorting devices 4 for sorting defective workpieces. The two sorting devices 4 are arranged at different angles around the conveyor tray 14 and are far away from the multiple camera shooting devices 2. Each sorting device 4 includes: a bracket 41, which is fixedly installed on the base 11. A crossbeam 42 is fixedly installed on the side of the bracket 41 closest to the conveyor tray 14. A through groove is opened on the crossbeam 42. A movable block 3 43 is slidably connected in the through groove. The bottom of the movable block 3 43 extends out of the through groove and is fixedly connected to a support 44. An air-blowing sorter 45 is fixedly installed on one side of the support 44. The upper end of the movable block 3 43 extends out of the through groove and is threadedly connected to an adjusting screw 46. The two ends of the adjusting screw 46 pass through the upper end of the movable block 3 43 and are rotatably connected to the bracket 41 and the crossbeam 42, respectively. A fifth power source is provided at one end of the adjusting screw 46 to drive its rotation.

[0059] It should also be noted that the fifth power source is servo motor three, which is fixedly mounted on bracket 41, and the output shaft of servo motor three passes through bracket 41 and is fixedly connected to adjusting screw 46.

[0060] In this embodiment, by setting up two sorting devices 4, and utilizing the air-blowing sorters 45 on them, defective or good products analyzed by the image processing computer 3 can be blown into different collection boxes simultaneously, resulting in high sorting efficiency and improved production efficiency. Before using the two sorting devices 4, the servo motors 3 installed on them can be started according to the conveying position of different workpieces. At this time, each servo motor 3 will drive the moving block 3 43 connected to it to move horizontally in the through slot. Under the action of each carrier 44, each moving block 3 43 can drive each air-blowing sorter 45 to move horizontally, so that each air-blowing sorter 45 can move to the conveying position of different workpieces and sort different workpieces, ensuring sorting efficiency.

[0061] In practical use, the workpiece is first placed at the field of view of the vision camera 24 of the multiple camera capturing device 2. Then, based on the focusing situation of each vision camera 24 and the workpiece, the corresponding servo motor is activated to drive the bidirectional screw 22 connected to it to rotate. Since the bidirectional screw 22 is provided with two sections of threads in opposite directions, and these two sections of threads are respectively threaded to slider 1 23 and slider 25, when the corresponding bidirectional screw 22 rotates, the slider 1 23 and slider 25 connected to it will drive the vision camera 24 and the lighting lamp 26 to move in opposite directions, thereby adjusting the vision camera 24 to better focus on the surface of the workpiece. Depending on the position of the workpiece conveyed to the conveyor plate 14, the cylinders 234 and 254 on the multiple camera shooting devices 2 can be activated. Under the guidance of the two guide rods 233 and 253 respectively, the cylinders 234 and 254 can stably push the extension blocks 231 and 251 connected to the moving block 232 and 252 to extend or retract. Thus, the extension blocks 231 and 251 can indirectly adjust the installation position of the vision camera 24 and the lighting lamp 26, ensuring that the vision camera 24 and the lighting lamp 26 can be aligned with different workpiece surfaces.

[0062] Secondly, depending on the intensity of the light, two cylinders can be activated. Under the guidance of the limit rod 26117 and the limit block 26116, both cylinders will stably push the two lifting frames 26114 to rise or fall. The two lifting frames 26114, connected by the mounting plate 2611, can synchronously drive the diffuser 2612 to rise or fall, thus maintaining an appropriate distance between the diffuser 2612 and the lighting lamp 26 to achieve a better uniform dispersion of the light source. Next, the servo motor can be activated at different workpieces and light alignment angles. The servo motor will drive the worm gear 26112 connected to it to rotate. Since the worm gear 26112 and the worm wheel 26113 on the corresponding side connecting shaft 26111 mesh with each other, when the worm gear 26112 rotates, the two connecting shafts 26111 will drive the diffuser 2612 connected to the mounting plate 2611 to rotate at different angles, thus concentrating the light from the lighting lamp 26 onto the surface of workpieces of different shapes.

[0063] Then, according to the different workpieces' conveying positions, the servo motors installed on them are started. At this time, each servo motor will drive the moving block 43 connected to it to move horizontally in the through slot. Each moving block 43, under the action of each carrier 44, can drive each air-blowing sorter 45 to move horizontally, thereby moving each air-blowing sorter 45 to the conveying position of different workpieces.

[0064] However, after the above operations are adjusted, the workpieces will be evenly fed onto the conveyor plate 14 by the vibratory feeder. The slow motor, under the connection of the rotating shaft 15, can stably drive the workpieces evenly arranged on the conveyor plate 14 to rotate sequentially to multiple camera shooting devices 2 and two sorting devices 4 distributed at different angles. When each workpiece rotates sequentially to the multiple camera shooting devices 2 distributed at different angles, the vision cameras 24 on the multiple camera shooting devices 2 can capture images of each workpiece from multiple angles. The captured images will be transmitted to the image processing computer 3. At this time, the image processing computer 3 can quickly process the image data captured by the multiple vision cameras 24, perform real-time image processing and analysis, and quickly detect and identify whether the conveyed workpieces are defective. Then, the detected and identified workpieces will be conveyed to two air-blowing sorting machines 45. Based on the result of the judgment of the image processing computer 3, the two air-blowing sorting machines 45 can blow the sequentially conveyed defective or good products into different collection boxes, thereby realizing the screening of different defective workpieces.

[0065] When using the vision camera 24 to capture images of the workpiece, the surface of its illumination lamp 26 is provided with a diffuser 2612, an anti-reflective film 26121 and a light guide 26122, which ensure that the light from the illumination lamp 26 is evenly concentrated on the workpiece, ensuring the illumination effect. This allows the vision camera 24 to obtain better image quality and clarity, improve the accuracy of image processing and analysis, and thus ensure the efficiency and effectiveness of defective product screening, thereby improving production efficiency.

[0066] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A defective product screening system based on high-precision visual camera inspection, characterized in that, include: Product conveying module, the product conveying module includes product conveying equipment (1) for conveying and guiding production workpieces; An image acquisition module is connected to the product conveying module, and the image acquisition module includes multiple camera shooting devices (2) for acquiring images of the conveyed workpiece; Each of the camera shooting devices (2) is provided with a light source uniformity component (261) for uniform light distribution of each camera shooting device (2). Each light source uniformity component (261) is composed of a diffuser (2612) and an adjustment component. The diffuser (2612) is placed on the lighting lamp (26). The diffuser (2612) adopts a multi-layer design. The surface of the diffuser (2612) is concave and convex. An anti-reflection film (26121) is bonded to the diffuser (2612). A light guide (26122) is fixedly installed inside the diffuser (2612) on the side of the diffuser (26) close to the lighting lamp (26). Each adjusting component includes two symmetrical connecting brackets (26115), which are fixedly connected to the lighting lamp (26). Each connecting bracket (26115) has a lifting groove on its upper part, and a limit groove is provided on the side of each connecting bracket (26115) away from the lighting lamp (26). A lifting frame (26114) is slidably connected within each of the two lifting grooves. A cylinder is installed at the bottom of each of the two lifting frames (26114), and the two cylinders are fixedly connected to the bottom of the two lifting grooves. The piston rod of cylinder three is fixedly connected to two lifting frames (26114) respectively, and limit blocks (26116) are fixedly connected to the surfaces of the two lifting frames (26114). The two limit blocks (26116) are slidably connected in two limit grooves respectively, and each of the two limit blocks (26116) is provided with a limit rod (26117). The two limit blocks (26116) are slidably sleeved on the two limit rods (26117) respectively, and the two limit rods (26117) are fixedly installed in the two limit grooves respectively. The two lifting frames (26114) are fixedly connected to two lifting frames (26114) respectively. The upper ends of the two connecting shafts (26111) pass through the lifting groove and are rotatably connected to the connecting shafts (26111). The two connecting shafts (26111) are close to each other and are fixedly connected to the mounting plate (2611). The mounting plate (2611) is set above the lighting lamp (26) and has a mounting hole in the middle. The bottom edge of the diffuser (2612) is fixedly connected to the edge of the mounting hole. A worm gear (26113) is fixedly connected to one of the connecting shafts (26111). The worm gear (26113) is engaged on one side. There is a worm gear (26112), and both the worm gear (26112) and the worm gear (26112) are rotatably connected to the upper end of the lifting frame (26114) connected by the connecting shaft (26111). A servo motor 2 is provided at one end of the worm gear (26112). The servo motor 2 is fixedly installed at the upper end of the lifting frame (26114) connected by the connecting shaft (26111). The output shaft of the servo motor 2 extends into the lifting frame (26114) connected by the connecting shaft (26111) and is fixedly connected to the worm gear (26112). An image analysis module is electrically connected to the image acquisition module, and the image analysis module includes an image processing computer (3) for analyzing and judging images acquired from the workpiece; The product sorting module is electrically connected to the image analysis module, and the product sorting module includes two sorting devices (4) for sorting defective workpieces.

2. The defective product screening system based on high-precision visual camera detection as described in claim 1, characterized in that: The product conveying equipment (1) includes: The base (11) is fixedly mounted with four fixed frames (12) on its upper sides. A top plate (13) is fixedly connected above the four fixed frames (12). The bottom of the top plate (13) is fixedly connected to the top of the image processing computer (3). A conveyor plate (14) is provided directly below the top plate (13). A rotating shaft (15) is fixedly connected to the bottom of the conveyor plate (14). The bottom of the rotating shaft (15) is rotatably connected to the base (11). A first power source for driving the rotation of the rotating shaft (15) is provided at the bottom of the rotating shaft (15).

3. The defective product screening system based on high-precision visual camera detection as described in claim 1, characterized in that: Multiple camera capturing devices (2) are arranged at different angles around the conveyor tray (14), and each camera capturing device (2) includes: Mounting bracket (21) has a groove on the side near the conveyor plate (14). A bidirectional screw (22) is rotatably connected in the groove. One end of the bidirectional screw (22) is provided with a second power source to drive its rotation. The bidirectional screw (22) is provided with two threads in opposite directions. The two threads in opposite directions are respectively threaded to slider one (23) and slider two (25).

4. The defective product screening system based on high-precision visual camera detection as described in claim 3, characterized in that: The ends of slider 1 (23) and slider 2 (25) connected to the bidirectional screw (22) are slidably connected in the groove. The ends of slider 1 (23) and slider 2 (25) away from the bidirectional screw (22) are respectively provided with extension groove 1 and extension groove 2. The upper surfaces of slider 1 (23) and slider 2 (25) are respectively provided with moving groove 1 and moving groove 2.

5. The defective product screening system based on high-precision visual camera inspection as described in claim 4, characterized in that: Extension block 1 (231) and extension block 2 (251) are slidably connected in extension groove 1 and extension groove 2 respectively. A vision camera (24) and a lighting lamp (26) are fixedly connected to the ends of extension block 1 (231) and extension block 2 (251) away from extension groove 1 and extension groove 2 respectively. The vision camera (24) and the lighting lamp (26) are kept facing each other.

6. The defective product screening system based on high-precision visual camera detection as described in claim 5, characterized in that: Movable block 1 (232) and movable block 2 (252) are fixedly installed above the extension block 1 (231) and extension block 2 (251), respectively. Movable block 1 (232) and movable block 2 (252) are slidably connected in movable groove 1 and movable groove 2, respectively. One end of movable block 1 (232) and movable block 2 (252) is provided with a third power source and a fourth power source to drive their movement.

7. The defective product screening system based on high-precision visual camera detection as described in claim 6, characterized in that: The first movable block (232) and the second movable block (252) are respectively provided with two symmetrical guide rods (233) and two symmetrical guide rods (253). The first movable block (232) and the second movable block (252) are slidably sleeved on the two guide rods (233) and the two guide rods (253). The two guide rods (233) and the two guide rods (253) are respectively fixedly connected in the first movable groove and the second movable groove.

8. The defective product screening system based on high-precision visual camera detection as described in claim 1, characterized in that: Two sorting devices (4) are arranged at different angles around the conveyor tray (14) and away from multiple camera shooting devices (2). Each sorting device (4) includes: A support (41) is fixedly installed on the base (11), and a cross frame (42) is fixedly installed on the side of the support (41) near the conveyor plate (14). A through groove is provided on the cross frame (42), and a movable block three (43) is slidably connected in the through groove. The bottom of the movable block three (43) extends out of the through groove and is fixedly connected to a support seat (44). An air-blowing sorter (45) is fixedly installed on one side of the support seat (44).

9. The defective product screening system based on high-precision visual camera detection as described in claim 8, characterized in that: The upper end of the movable block three (43) extends above the through slot and is threadedly connected to an adjusting screw (46). The two ends of the adjusting screw (46) pass through the upper end of the movable block three (43) and are rotatably connected to the bracket (41) and the cross frame (42) respectively. One end of the adjusting screw (46) is provided with a fifth power source to drive its rotation.

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