A high-precision visual inspection system and method for the side of a product

Abstract

This application relates to a high-precision visual inspection system and method for product sides, belonging to the technical field of visual inspection. It includes a worktable, a light source, a vision camera, and reflectors. The worktable has an inspection area for placing the product. The light source illuminates the side of the product within the inspection area. The vision camera is positioned above the inspection area. Several reflectors are obliquely arranged on the worktable, each corresponding to a side of the product within the inspection area. The reflectors are located to the side of the corresponding side of the product. When the light source illuminates the side of the product, the light reflected from the side is reflected by the reflectors to the central area of ​​the vision camera. This application achieves high-precision inspection of all sides of a product under single-vision camera conditions, reducing equipment cost and size.

Description

Technical Field

[0001] This application relates to the technical field of visual inspection, and in particular to a high-precision visual inspection system and method for the side of a product. Background Technology

[0002] Visual inspection technology is a common inspection technology in the industrial field. It has a wide range of applications in material handling on production lines and product quality inspection. Compared with conventional manual inspection, visual inspection is far more efficient.

[0003] In visual inspection, the accuracy of the visual camera has a significant impact on the subsequent inspection results, especially for visual inspection techniques targeting surface scratches, which require very high resolution from the visual camera. Typically, the image sensor of a visual camera (usually either CCD or CMOS) has a fixed size. To improve the clarity of certain areas, the proportion of other parts of the image sensor that are visible can be reduced, thereby increasing the proportion of the area to be inspected that is visible within the image sensor, thus improving the inspection accuracy.

[0004] Conventional vision inspection lenses primarily inspect products through external lenses, using distortion to magnify the central area and improve sampling accuracy in that area. However, the problem with lens distortion is that deformation occurs at the edges, resulting in poorer imaging quality and reduced accuracy in those areas. If the area to be inspected is a side of the product, multiple vision cameras are often required to inspect each side, leading to higher inspection costs and larger equipment size. Summary of the Invention

[0005] In order to achieve high-precision inspection of all sides of a product under single-vision camera conditions and reduce equipment cost and size, this application provides a high-precision vision inspection system and method for product sides.

[0006] In a first aspect, the high-precision visual inspection system for the side of a product provided in this application adopts the following technical solution: it includes a worktable, a light source, a vision camera, and a reflector. The worktable is provided with an inspection area for placing the product. The light source is used to illuminate the side of the product in the inspection area. The vision camera is located above the inspection area. Several reflectors are obliquely arranged on the worktable and correspond one-to-one with the side of the product in the inspection area. The reflector is located to the side of the corresponding side of the product. The reflector is used so that when the light source illuminates the side of the product, the light reflected from the side of the product is reflected by the reflector to the middle area of ​​the vision camera.

[0007] By adopting the above technical solution, the image of the side of the product is folded and projected onto the middle area of ​​the photosensitive element of the vision camera located directly above by using a tilted reflector. Since the image quality of the middle area of ​​the photosensitive element is usually higher and the distortion is smaller, high-precision detection of each side of the product can be achieved under single vision camera conditions, reducing equipment cost and size.

[0008] Optionally, the light source is arranged in a ring, with a light-transmitting plate in the center of the light source. The light source is located between the vision camera and the worktable. The reflector is used so that when the light source illuminates the side of the product, the light reflected from the side of the product is reflected by the reflector, passes through the light-transmitting plate, and finally enters the central area of ​​the vision camera.

[0009] By adopting the above technical solution, the ring light source provides uniform illumination to all sides of the product. The light reflected from the side of the product by the reflector enters the vision camera above directly through the central light-transmitting plate of the ring light source. The light path is clear and compact, avoiding the light source itself from blocking the light path, thus ensuring the brightness and uniformity of the image.

[0010] Optionally, the workbench is provided with a loading area and a unloading area. A slide rail is fixedly installed on the workbench, and a sliding frame is slidably installed in the slide rail. A sliding mechanism for driving the sliding frame to slide is provided on the workbench. An electric loading gripper and an electric unloading gripper are fixedly installed on the sliding frame. The electric loading gripper is used to grab the product in the loading area and release it in the detection area. The electric unloading gripper is used to grab the product in the detection area and release it in the unloading area.

[0011] By adopting the above technical solution, when inspecting products, the product to be inspected is placed in the loading area by a manual operator or the output end of the previous process. The loading electric gripper first picks up the product in the loading area, while the unloading electric gripper picks up the product that has already been inspected in the inspection area. Then, the sliding mechanism drives the sliding frame to slide towards the unloading area. The loading electric gripper moves to the inspection area, and the unloading electric gripper moves to the unloading area. Both the loading and unloading electric grippers release the products they are holding. The products that have been inspected remain in the unloading area, where they are classified or otherwise processed by a manual operator or the input end of the subsequent process according to the inspection results. The product to be inspected remains in the inspection area. Then, the sliding mechanism drives the sliding frame to move towards the loading area. During this process, the light source illuminates the side of the product. The light reflected from the side of the product is reflected by the corresponding reflector to the middle area of ​​the vision camera. The vision camera captures the image reflected by the reflector and transmits it to the processor. The processor processes and analyzes the captured image to detect defects or features on the side of the product, and then enters the next work cycle, thus realizing the automatic flow of products.

[0012] Optionally, the sliding mechanism includes a lead screw and a motor. The lead screw is rotatably connected to the slide rail and threadedly connected to the sliding frame. The motor is fixedly connected to the slide rail, and the output end of the motor is coaxially fixed with the lead screw.

[0013] By adopting the above technical solution, the motor drives the lead screw to rotate, and the lead screw and the sliding frame are threaded together, converting the lead screw's rotational motion into the linear sliding motion of the sliding frame. The lead screw has the characteristics of high transmission accuracy and smooth operation, ensuring the accuracy of the sliding frame driving the electric gripper for loading and unloading to the end point of the movement.

[0014] Optionally, the workbench is provided with clearance slots corresponding to the reflectors, and the workbench is provided with clearance devices for driving the reflectors to extend or retract into the clearance slots.

[0015] By adopting the above technical solution, when the electric gripper for loading or unloading approaches the detection area, the avoidance device drives the reflector to retract into the avoidance groove to prevent the reflector from interfering with the movement of the electric gripper for loading and unloading, as well as the transfer of the product.

[0016] Optionally, the avoidance device includes a mounting frame and a deflection mechanism. The reflector is fixedly mounted on the mounting frame, and the bottom of the mounting frame is rotatably connected to the avoidance groove. The deflection mechanism is used to drive the mounting frame to rotate.

[0017] By adopting the above technical solution, when a product needs to be inspected, the deflection mechanism drives the mounting frame to rotate, and the mounting frame and the reflector on it are rotated to a preset tilt angle, folding the image of the side of the product and projecting it onto the middle area of ​​the visual camera photosensitive element located directly above; when it is necessary to avoid the electric gripper for loading and unloading, the mounting frame flips into the avoidance groove, so that the reflector is completely submerged in the avoidance groove. At this time, the reflector is located below the worktable surface and does not interfere with the transfer of the product.

[0018] Optionally, the deflection mechanism includes a telescopic rod, a movable pin, a rotating disk, and a power assembly. The mounting frame has a groove along the inclined direction of the reflector. The telescopic rod passes through the worktable and slides vertically against it. Each telescopic rod corresponds to one of the mounting frames. The movable pin is fixedly connected to the top of the telescopic rod and rotates and slides within the groove. The rotating disk is rotatably mounted at the bottom of the worktable. A cam track is provided on the peripheral wall of the rotating disk. The bottom of the telescopic rod slides within the cam track, and the telescopic rod moves vertically as the cam track rotates. The power assembly drives the rotating disk to rotate.

[0019] By adopting the above technical solution, when the electric gripper for loading or unloading approaches the detection area, the power component drives the rotary table to rotate, which in turn drives the cam track to rotate. The telescopic rod moves vertically downward with the rotation of the cam track, which in turn drives the movable pin to move downward. The movable pin pulls the slide groove, which in turn pulls down the mounting bracket, causing the mounting bracket and the reflector to deflect towards the avoidance groove, thereby avoiding the electric gripper for loading and unloading.

[0020] Optionally, the power assembly includes a gear and a rack, the rack being fixedly connected to the sliding frame, the gear being coaxially fixed to the rotating disk, and the gear and rack meshing with each other.

[0021] By adopting the above technical solution, when the electric gripper for loading or unloading approaches the detection area, the rack and gear mesh with the sliding frame, driving the rotating disk to rotate, thereby automatically triggering the retraction action of the reflector, realizing the coordinated movement of the electric gripper for loading and unloading and the reflector avoidance action.

[0022] Optionally, the light source is provided in several parts, the light source and the reflector are located in the same horizontal plane, the light source is fan-shaped, and the light source is located between two adjacent reflectors.

[0023] By adopting the above technical solution, the light source shines on the side of the product, and the side of the product reflects the light into the reflector. The reflector reflects the image of the side of the product into the lens above. The light source and the reflector are on the same horizontal plane, which minimizes the direct illumination of some light from the light source onto the reflector, thus avoiding local over-brightness on the reflector and affecting the imaging of the side of the product. In addition, since there are no other components between the vision camera and the reflector, there is enough space between the vision camera and the reflector to move the product.

[0024] Secondly, the high-precision visual inspection method for the side of a product provided in this application adopts the following technical solution, which includes the following steps: S1: Place the product in the inspection area of ​​the workbench; S2: Activate the light source to illuminate the side of the product. The light reflected from the side of the product is reflected by the corresponding mirror to the center area of ​​the vision camera. S3: The vision camera captures images reflected by the mirror and transmits them to the processor, which processes and analyzes the captured images to detect defects or features on the side of the product.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up a worktable, light source, vision camera, and reflector, and using the tilted reflector, the image of the side of the product is folded and projected onto the middle area of ​​the photosensitive element of the vision camera located directly above. Since the image quality of the middle area of ​​the photosensitive element is usually higher and the distortion is smaller, high-precision detection of each side of the product can be achieved under the condition of a single vision camera, reducing equipment cost and size. 2. By setting up a loading area, a unloading area, a slide rail, a sliding frame, a sliding mechanism, a loading electric gripper, and an unloading electric gripper, the loading electric gripper first grabs the products in the loading area, and the unloading electric gripper grabs the products that have been inspected in the inspection area. Then, the sliding mechanism drives the sliding frame to slide towards the unloading area. The products that have been inspected remain in the unloading area, and the products to be inspected remain in the inspection area. Then, the sliding mechanism drives the sliding frame to move towards the loading area, thereby realizing the automatic flow of products. 3. By setting up clearance grooves, mounting brackets, telescopic rods, movable pins, rotating disks, cam tracks, slides, gears, and racks, when the electric gripper for loading or unloading approaches the detection area, the rack and gears mesh as the sliding frame slides, driving the rotating disk to rotate. This automatically triggers the retraction action of the reflector, causing the reflector to retract into the clearance groove. This prevents the reflector from interfering with the movement of the electric gripper for loading and unloading, as well as the transfer of the product. This achieves coordinated movement between the transfer action of the electric gripper for loading and unloading and the clearance action of the reflector. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a high-precision visual inspection system for the side of a product provided in Embodiment 1 of this application.

[0027] Figure 2 yes Figure 1 Enlarged view of part A in the middle.

[0028] Figure 3 This is a structural schematic diagram from another perspective of a high-precision visual inspection system for the side of a product provided in Embodiment 1 of this application.

[0029] Figure 4 yes Figure 3 Enlarged view of section B.

[0030] Figure 5 This is a schematic diagram of a high-precision visual inspection system for the side of a product provided in Embodiment 2 of this application.

[0031] In the diagram, 1. Workbench; 11. Loading area; 12. Inspection area; 13. Unloading area; 14. Slide rail; 141. Sliding frame; 1411. Electric loading gripper; 1412. Electric unloading gripper; 15. Sliding mechanism; 151. Lead screw; 152. Motor; 16. Clearance groove; 2. Light source; 21. Light-transmitting plate; 3. Vision camera; 4. Reflector; 5. Clearance device; 51. Mounting bracket; 511. Slide groove; 52. Deflection mechanism; 521. Telescopic rod; 522. Movable pin; 523. Rotary disk; 5231. Cam rail; 524. Power assembly; 5241. Gear; 5242. Rack; 6. Product. Detailed Implementation

[0032] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail below.

[0033] Example 1

[0034] Embodiment 1 of this application discloses a high-precision visual inspection system for the side of a product, referring to... Figure 1 The system includes a worktable 1, a light source 2, a vision camera 3, and a reflector 4. The vision camera 3 and the light source 2 are both fixedly connected to the worktable 1. In Embodiment 1 of this application, the vision camera 3 is a CCD camera. The worktable 1 has a detection area 12 for placing a product 6. In Embodiment 1 of this application, the product 6 has four sides to be detected. The light source 2 is used to illuminate the sides of the product 6 within the detection area 12. The vision camera 3 is positioned above the detection area 12. Several (four) reflectors 4 are obliquely arranged on the worktable 1, corresponding one-to-one with the sides of the product 6 within the detection area 12. The reflectors 4 are located to the side of the corresponding side of the product 6. The reflectors 4 are used so that when the light source 2 illuminates the side of the product 6, the light reflected from the side of the product 6 is reflected through the reflectors 4 to the central area of ​​the vision camera 3.

[0035] Reference Figure 1 By using a tilted reflector 4, the image of the side of product 6 is refracted and projected onto the central area of ​​the photosensitive element of the vision camera 3 located directly above. Since the image quality in the central area of ​​the photosensitive element is usually higher and the distortion is smaller, high-precision detection of all sides of product 6 can be achieved with a single vision camera 3, reducing equipment cost and size.

[0036] Reference Figure 1 In Embodiment 1 of this application, the light source 2 is arranged in a ring, with a light-transmitting plate 21 in the center of the light source 2. The light source 2 is vertically positioned between the vision camera 3 and the worktable 1. The reflector 4 is used so that when the light source 2 illuminates the side of the product 6, the light reflected from the side of the product 6 is reflected by the reflector 4, passes through the light-transmitting plate 21, and finally enters the central area of ​​the vision camera 3.

[0037] Reference Figure 1The workbench 1 is provided with a loading area 11 and a unloading area 13. The loading area 11, the inspection area 12, and the unloading area 13 are arranged at intervals along the length of the workbench 1. A slide rail 14 is fixedly provided on one side of the workbench 1 in the width direction. A sliding frame 141 is slidably provided in the slide rail 14 along the length of the workbench 1. A sliding mechanism 15 is provided on the workbench 1 to drive the sliding frame 141 to slide.

[0038] Reference Figure 1 The sliding mechanism 15 includes a lead screw 151 and a motor 152. The lead screw 151 is rotatably connected to the slide rail 14 and threadedly connected to the sliding frame 141. The motor 152 is fixedly connected to the slide rail 14, and the output end of the motor 152 is coaxially fixed with the lead screw 151. The motor 152 is a servo motor. The motor 152 drives the lead screw 151 to rotate in the forward or reverse direction, thereby causing the sliding frame 141 to reciprocate along the length of the worktable 1.

[0039] Reference Figure 1 The sliding frame 141 is fixedly equipped with a loading electric gripper 1411 and a unloading electric gripper 1412. The loading electric gripper 1411 is used to grip the product 6 in the loading area 11 and release it in the detection area 12. The unloading electric gripper 1412 is used to grip the product 6 in the detection area 12 and release it in the unloading area 13.

[0040] Reference Figure 1 The workbench 1 is provided with clearance grooves 16 corresponding to the reflectors 4, and clearance devices 5 are provided on the workbench 1. The clearance devices 5 are used to drive the reflectors 4 to extend or retract into the clearance grooves 16.

[0041] Reference Figure 1 When inspecting product 6, the product 6 to be inspected is placed in the loading area 11 by a person or the output end of the previous process. The loading electric gripper 1411 first grabs the product 6 to be inspected in the loading area 11, while the unloading electric gripper 1412 grabs the product 6 that has been inspected in the inspection area 12. Then, the motor 152 drives the sliding frame 141 to slide towards the unloading area 13 through the lead screw 151. The loading electric gripper 1411 moves to the inspection area 12, and the unloading electric gripper 1412 moves to the unloading area 13. During this process, when either the loading electric gripper 1411 or the unloading electric gripper 1412 is close to the inspection area 12, the avoidance device 5 will drive the reflector 4 to retract into the avoidance groove 16 to prevent the reflector 4 from interfering with the movement of the loading electric gripper 1411 and the unloading electric gripper 1412, as well as the transfer of product 6.

[0042] Reference Figure 1Next, both the loading electric gripper 1411 and the unloading electric gripper 1412 release the products 6 they are holding. Products 6 that have completed inspection remain in the unloading area 13, where they are manually sorted or otherwise processed based on the inspection results by the input of subsequent processes. Products 6 awaiting inspection remain in the inspection area 12. Then, the motor 152 drives the sliding frame 141 towards the loading area 11 via the lead screw 151. During this process, the avoidance device 5 causes the reflector 4 to extend out of the avoidance slot 16 and return to the preset tilt angle. The light source 2 illuminates the side of product 6, and the light reflected from the side of product 6 is reflected by the corresponding reflector 4 to the central area of ​​the vision camera 3. The vision camera 3 captures the image reflected by the reflector 4 and transmits it to the processor. The processor processes and analyzes the captured image to detect defects or features on the side of product 6. Then, the next work cycle begins, thus achieving the automatic flow of product 6.

[0043] To control the automatic extension or retraction of the rearview mirror 4 into the clearance slot 16, refer to Figure 1 and Figure 2 The avoidance device 5 includes a mounting bracket 51 and a deflection mechanism 52. The reflector 4 is fixedly mounted on the mounting bracket 51, and the bottom of the mounting bracket 51 is rotatably connected to the avoidance groove 16. The deflection mechanism 52 is used to drive the mounting bracket 51 to rotate.

[0044] Reference Figure 2 and Figure 3 The deflection mechanism 52 includes a telescopic rod 521, a movable pin 522, a rotating disk 523, and a power assembly 524. A groove 511 is provided on the mounting bracket 51 along the inclined direction of the reflector 4. The telescopic rod 521 passes through the worktable 1 and slides vertically with it. Each telescopic rod 521 corresponds to one mounting bracket 51. The movable pin 522 is fixedly connected to the top of the telescopic rod 521 and rotates and slides within the groove 511. The rotating disk 523 is rotatably mounted at the bottom of the worktable 1. The axis of rotation of the rotating disk 523 is vertical and located at the center of the detection area 12.

[0045] Reference Figure 3 and Figure 4 A cam track 5231 is provided on the peripheral wall of the rotating disk 523. The bottom of the telescopic rod 521 is slidably disposed within the cam track 5231. The telescopic rod 521 moves vertically as the cam track 5231 rotates. The power assembly 524 is used to drive the rotating disk 523 to rotate. In Embodiment 1 of this application, a roller is rotatably disposed at the bottom of the telescopic rod 521, and the roller rolls within the cam track 5231.

[0046] Reference Figure 3 and Figure 4The power assembly 524 includes a gear 5241 and a rack 5242. The rack 5242 is fixedly connected to the sliding frame 141, the gear 5241 is coaxially fixed to the rotating disk 523, and the gear 5241 and the rack 5242 mesh with each other.

[0047] Reference Figure 3 and Figure 4 When the electric gripper 1411 for loading or the electric gripper 1412 for unloading is close to the detection area 12, as the sliding frame 141 slides, the rack 5242 meshes with the gear 5241, driving the rotating disk 523 to rotate, which in turn drives the cam track 5231 to rotate. The telescopic rod 521 moves vertically downwards with the rotation of the cam track 5231, which in turn drives the movable pin 522 to move downwards. The movable pin 522 pulls the slide groove 511, which in turn pulls down the mounting frame 51, causing the mounting frame 51 and the reflector 4 to deflect towards the clearance groove 16, thereby avoiding the electric gripper 1411 and the electric gripper 1412.

[0048] Reference Figure 3 and Figure 4 Conversely, when the loading electric gripper 1411 or unloading electric gripper 1412 is at a certain distance from the detection area 12, as the sliding frame 141 slides, the rack 5242 meshes with the gear 5241, driving the rotating disk 523 to rotate, which in turn drives the cam track 5231 to rotate. The telescopic rod 521 moves vertically upward with the rotation of the cam track 5231, which in turn drives the movable pin 522 to move upward. The movable pin 522 pushes the slide groove 511, which in turn abuts against the mounting frame 51, causing the mounting frame 51 and the reflector 4 to deflect away from the avoidance groove 16 until the reflector 4 returns to the preset tilt angle. This automatically triggers the retraction action of the reflector 4, realizing the coordinated movement of the loading electric gripper 1411, the unloading electric gripper 1412 transfer action and the reflector 4 avoidance action.

[0049] The implementation principle of a high-precision visual inspection system for the side of a product according to Embodiment 1 of this application is as follows: by using a tilted reflector 4, the image of the side of the product 6 is folded and projected onto the middle area of ​​the photosensitive element of the visual camera 3 located directly above. Since the imaging quality of the middle area of ​​the photosensitive element is usually higher and the distortion is smaller, high-precision inspection of each side of the product 6 can be achieved under the condition of a single visual camera 3, thereby reducing equipment cost and size.

[0050] Example 2

[0051] Embodiment 2 of this application discloses a high-precision visual inspection system for the side of a product, referring to... Figure 5The system includes a worktable 1, a light source 2, a vision camera 3, and a reflector 4. Both the vision camera 3 and the light source 2 are fixedly connected to the worktable 1. In embodiment 2 of this application, the vision camera 3 is a CCD camera. The worktable 1 has a detection area 12 for placing a product 6. In embodiment 2 of this application, the product 6 has four sides to be detected. The light source 2 is used to illuminate the sides of the product 6 within the detection area 12. The vision camera 3 is positioned above the detection area 12. Several (four) reflectors 4 are obliquely arranged on the worktable 1, corresponding one-to-one with the sides of the product 6 within the detection area 12. The reflectors 4 are located to the side of the corresponding side of the product 6. The reflectors 4 are used so that when the light source 2 illuminates the side of the product 6, the light reflected from the side of the product 6 is reflected by the reflectors 4 to the central area of ​​the vision camera 3.

[0052] Reference Figure 5 In Embodiment 2 of this application, several light sources 2 are provided. The light sources 2 and the reflectors 4 are located on the same horizontal plane. The light sources 2 are fan-shaped and located between two adjacent reflectors 4. One end of the light source 2 is connected to the end of one of the adjacent reflectors 4, and the other end of the light source 2 is connected to the end of another adjacent reflector 4. The light source 2 illuminates the side of the product 6, and the side of the product 6 reflects light into the reflector 4. The reflector 4 directly reflects the image of the side of the product 6 into the lens above. The light sources 2 and the reflectors 4 are on the same horizontal plane, which minimizes the direct illumination of some light from the light source 2 onto the reflector 4, preventing localized overbrightness on the reflector 4 and affecting the imaging of the side of the product 6. In addition, since there are no other components between the vision camera 3 and the reflector 4, there is sufficient space between the vision camera 3 and the reflector 4 to move the product 6.

[0053] Embodiment 1 or 2 of this application also discloses a high-precision visual inspection method for the side of a product, which includes the following steps: S1: Place product 6 in the inspection area 12 of workbench 1; S2: Activate light source 2 to illuminate the side of product 6. The light reflected from the side of product 6 is reflected by the corresponding reflector 4 to the middle area of ​​vision camera 3. S3: The vision camera 3 captures the image reflected by the reflector 4 and transmits it to the processor, which processes and analyzes the captured image to detect defects or features on the side of the product 6.

[0054] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A high-precision visual inspection system for the side of a product, characterized in that, The system includes a workbench (1), a light source (2), a vision camera (3), and a reflector (4). The workbench (1) has a detection area (12) for placing the product (6). The light source (2) is used to illuminate the side of the product (6) in the detection area (12). The vision camera (3) is located above the detection area (12). Several reflectors (4) are obliquely arranged on the workbench (1) and correspond one-to-one with the side of the product (6) in the detection area (12). The reflector (4) is located to the side of the corresponding side of the product (6). The reflector (4) is used so that when the light source (2) illuminates the side of the product (6), the light reflected from the side of the product (6) is reflected by the reflector (4) to the middle area of ​​the vision camera (3).

2. The high-precision visual inspection system for the side of a product according to claim 1, characterized in that, The light source (2) is arranged in a ring shape, and a light-transmitting plate (21) is arranged in the center of the light source (2). The light source (2) is located between the vision camera (3) and the worktable (1). The reflector (4) is used so that when the light source (2) illuminates the side of the product (6), the light reflected from the side of the product (6) is reflected by the reflector (4) and passes through the light-transmitting plate (21) and finally enters the middle area of ​​the vision camera (3).

3. The high-precision visual inspection system for the side of a product according to claim 2, characterized in that, The workbench (1) is provided with a loading area (11) and a unloading area (13). A slide rail (14) is fixedly provided on the workbench (1). A sliding frame (141) is slidably provided in the slide rail (14). A sliding mechanism (15) for driving the sliding frame (141) to slide is provided on the workbench (1). An electric gripper for loading (1411) and an electric gripper for unloading (1412) are fixedly provided on the sliding frame (141). The electric gripper for loading (1411) is used to grab the product (6) in the loading area (11) and release it in the detection area (12). The electric gripper for unloading (1412) is used to grab the product (6) in the detection area (12) and release it in the unloading area (13).

4. The high-precision visual inspection system for the side of a product according to claim 3, characterized in that, The sliding mechanism (15) includes a lead screw (151) and a motor (152). The lead screw (151) is rotatably connected to the slide rail (14), and the lead screw (151) is threadedly connected to the sliding frame (141). The motor (152) is fixedly connected to the slide rail (14), and the output end of the motor (152) is coaxially fixed with the lead screw (151).

5. The high-precision visual inspection system for the side of a product according to claim 3, characterized in that, The workbench (1) has clearance slots (16) corresponding to the reflectors (4) one by one. The workbench (1) is equipped with clearance devices (5), which are used to drive the reflectors (4) to extend or retract into the clearance slots (16).

6. The high-precision visual inspection system for the side of a product according to claim 5, characterized in that, The avoidance device (5) includes a mounting frame (51) and a deflection mechanism (52). The reflector (4) is fixedly mounted on the mounting frame (51). The bottom of the mounting frame (51) is rotatably connected to the avoidance groove (16). The deflection mechanism (52) is used to drive the mounting frame (51) to rotate.

7. The high-precision visual inspection system for the side of a product according to claim 6, characterized in that, The deflection mechanism (52) includes a telescopic rod (521), a movable pin (522), a rotating disk (523), and a power assembly (524). The mounting bracket (51) has a groove (511) along the inclined direction of the reflector (4). The telescopic rod (521) passes through the worktable (1) and slides vertically with the worktable (1). Each telescopic rod (521) corresponds to one mounting bracket (51). The movable pin (522) is fixedly connected to the top of the telescopic rod (521). Next, the movable pin (522) is rotated and slidably disposed in the slide groove (511), the rotating disk (523) is rotatably disposed at the bottom of the worktable (1), a cam track (5231) is provided on the peripheral wall of the rotating disk (523), the bottom of the telescopic rod (521) is slidably disposed in the cam track (5231), the telescopic rod (521) moves vertically with the rotation of the cam track (5231), and the power component (524) is used to drive the rotating disk (523) to rotate.

8. The high-precision visual inspection system for the side of a product according to claim 7, characterized in that, The power assembly (524) includes a gear (5241) and a rack (5242). The rack (5242) is fixedly connected to the sliding frame (141). The gear (5241) is coaxially fixed to the rotating disk (523). The gear (5241) and the rack (5242) mesh with each other.

9. The high-precision visual inspection system for the side of a product according to claim 1, characterized in that, The light source (2) is provided in several parts. The light source (2) and the reflector (4) are located on the same horizontal plane. The light source (2) is fan-shaped and located between two adjacent reflectors (4).

10. A high-precision visual inspection method for the side of a product, using the high-precision visual inspection system for the side of a product as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Place the product (6) in the inspection area (12) of the workbench (1); S2: Activate the light source (2) to illuminate the side of the product (6). The light reflected from the side of the product (6) is reflected by the corresponding reflector (4) to the middle area of ​​the vision camera (3). S3: The vision camera (3) captures the image reflected by the mirror (4) and transmits it to the processor, which processes and analyzes the captured image to detect defects or features on the side of the product (6).

Images