Defect identification platform based on visual inspection

Abstract

The invention discloses a defect identification platform based on visual inspection, and particularly relates to the field of visual identification detection, the defect identification platform comprises an overturning tool assembly and a visual identification detection assembly, the overturning tool assembly comprises a forward overturning tool and a reverse overturning tool, the forward overturning tool and the reverse overturning tool are both controlled by an overturning driver to overturn, and the visual identification detection assembly is connected with the forward overturning tool and the reverse overturning tool. Hole wall reflection assemblies are arranged at the positions, corresponding to installation holes in the to-be-detected product, of the forward overturning tool and the reverse overturning tool, each hole wall reflection assembly comprises a conical reflector and a second moving driver, and each conical reflector is provided with an inclined reflection face capable of reflecting light. According to the invention, the visual identification camera on the outer side collects the image of the outer surface of the to-be-detected product and simultaneously collects the reflection picture of the conical reflection block, so that the image information of the inner wall of the mounting hole can be identified, excessive visual identification cameras do not need to be arranged or controlled to move, the cost can be reduced, and the detection efficiency can be improved.

Description

Technical Field

[0001] This invention relates to the field of visual recognition and detection technology, and more specifically, to a defect recognition platform based on visual detection. Background Technology

[0002] With the continuous improvement of modern industrial automation, product quality control plays a crucial role in the manufacturing process. Its basic principle is to acquire images of the object being measured using industrial cameras, and then process and analyze these images using computer vision algorithms to achieve functions such as dimensional measurement, positioning, identification, and defect detection.

[0003] In the automotive manufacturing industry, many automotive structural components also use visual inspection technology to detect surface defects. For conventional products, such as panels and door panels, which are flat and have uniform structures, industrial cameras can collect a large number of area images at once, thus enabling a quick assessment of the overall surface quality of the product. However, for products with complex structures and a large number of inspection locations, multiple sets of visual recognition cameras are required for multi-directional and multi-angle visual recognition inspection. For example, for automotive control arms, sufficient visual recognition cameras are needed to fully acquire and recognize images of each surface of the product.

[0004] Since the main function of the car control arm is to connect the wheels and the car body, its structure is designed with corresponding mounting holes to facilitate the installation of structural components such as bushings and ball joints. The quality of these mounting holes needs to be strictly guaranteed. In existing technologies, multi-station visual recognition inspection is often used, where images are recognized at different positions of the product at different stations. However, for such hole structures, although the relative angle between the visual recognition camera and the product can be changed, especially when inspecting mounting holes, it is necessary to insert the corresponding visual recognition camera into the hole for inspection. Due to space limitations, it is difficult for the visual recognition camera to be directly aligned with the inner wall of the hole. This requires operators to repeatedly adjust the inspection, which not only results in relatively low inspection efficiency but also leads to missed inspections due to human error, affecting the inspection results. Summary of the Invention

[0005] The present invention provides a defect identification platform based on visual inspection, which aims to solve the following problem: In the prior art, multi-station visual recognition inspection is often used. Especially when inspecting mounting holes, it is necessary to use a corresponding visual recognition camera to extend into the hole for inspection. However, due to space limitations, it is difficult for the visual recognition camera to be directly aligned with the inner wall of the hole. This requires the operator to make repeated adjustments for inspection, which not only has relatively low inspection efficiency, but also causes missed inspections due to human operation, affecting the inspection effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a defect identification platform based on visual inspection, comprising a flipping fixture assembly and a visual recognition and inspection assembly, wherein the flipping fixture assembly comprises a forward flipping fixture and a reverse flipping fixture, and both the forward flipping fixture and the reverse flipping fixture are controlled by a flipping driver to flip their rotation. The forward and reverse flipping fixtures are also equipped with fixing structures for fixing the product to be tested. Both the forward and reverse flip fixtures are equipped with hole wall reflective components at the positions corresponding to the mounting holes on the product under test. The hole wall reflective components include a conical reflector and a second motion driver. The conical reflector has an inclined reflective surface that can reflect light. The second motion driver is used to drive the conical reflector into or out of the mounting hole and to drive the conical reflector to move along the length of the mounting hole inside the mounting hole.

[0007] Preferably, the defect identification platform further includes an isolation chassis, in which the flip tooling assembly and the visual recognition detection assembly are both housed. The visual recognition detection assembly includes an upper visual recognition camera group, a side visual recognition camera group, and a camera driving assembly. The upper visual recognition camera group is positioned above the flip tooling assembly, and the side visual recognition camera groups are positioned on both sides of the flip tooling assembly. The camera driving assembly is used to drive the movement of the corresponding visual recognition cameras in the upper and side visual recognition camera groups.

[0008] Preferably, both the forward-flipping fixture and the reverse-flipping fixture are provided with product mating structures for supporting the product under test. The forward-flipping fixture is adapted to the reverse side of the product under test, and the reverse-flipping fixture is adapted to the front side of the flipping fixture assembly. When both the forward-flipping fixture and the reverse-flipping fixture are flipped to a vertical position, the forward-flipping fixture and the reverse-flipping fixture simultaneously come into contact with the product under test.

[0009] Preferably, the fixing structure includes a hole position locator, which corresponds to the mounting hole on the product under test. The hole position locator includes a docking seat, which is driven by a first moving driver to move closer to or away from the mounting hole. The hole wall reflective component is mounted on the docking seat.

[0010] Preferably, the conical reflector is a conical reflective block, and the conical surface of the conical reflective block is set as a reflective structure to form an inclined reflective surface. The second moving driver can be a linear drive cylinder, which is fixedly installed on the docking seat, and the conical reflective block is fixedly installed on the output end of the linear drive cylinder.

[0011] Preferably, the conical reflector consists of a connecting seat and a concave reflector. The concave reflector is rotatably mounted on the connecting seat and is inclined relative to the length direction of the connecting seat. The surface of the concave reflector is set as a reflective surface, which forms an inclined reflective surface.

[0012] Preferably, the second moving drive is a screw drive, which includes a sliding seat, a rotary motor and a threaded rod. The threaded rod passes through the mating seat and is threadedly engaged with the mating seat. The connecting seat is fixedly installed at the end of the threaded rod. The sliding seat is slidably installed on the mating seat. The rotary motor is fixedly installed on the sliding seat and is used to drive the threaded rod to rotate.

[0013] Preferably, an elastic element is provided between the concave reflector and the connecting seat, which forms an expanding elastic force on the concave reflector, and a contact structure is provided at the end of the concave reflector away from the connecting seat.

[0014] Preferably, the contact structure includes a flat contact structure, which is a cylindrical structure. The flat contact structure is rotatably installed in the tail of the concave reflector. When the connecting seat enters the inner wall of the mounting hole, the front and rear ends of the flat contact structure contact the inner wall of the mounting hole. A direct light source is provided at the end of the flat contact structure corresponding to the advancing end of the concave reflector. The direct light source is used to fit against the inner wall of the mounting hole and emit light forward.

[0015] Preferably, the concave reflector has an arc-shaped cross-section, with the central area of ​​the concave reflector recessed towards the connecting seat, and the edge of the concave reflector having an edge protrusion that protrudes beyond the reflective surface of the concave reflector.

[0016] The beneficial effects of this invention are as follows: 1. This invention acquires images of the outer surface of the product under test by using an external visual recognition camera, while simultaneously acquiring the reflected image from a conical reflective block. This allows for the identification of the inner wall image information of the mounting hole. Furthermore, the rotating fixture can be flipped up and down to effectively identify more surfaces of the product under test. This eliminates the need for excessive setup of visual recognition cameras or excessive control of their movement, thereby reducing costs and improving testing efficiency.

[0017] 2. By setting the angle between the concave reflector and the connecting seat to be adjustable, the conical reflector can adapt to different apertures. The central area of ​​the concave reflector is recessed towards the connecting seat, thus forming a concave reflective structure. When reflecting the image information of the inner wall of the mounting hole, the concave mirror effect can also form a certain magnification, making it easier to identify surface defects. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the isolation enclosure of the present invention; Figure 3 This is a schematic diagram of the structure of the product to be tested in this invention; Figure 4 This is a schematic diagram of the structure of the flip tooling assembly of the present invention; Figure 5 This is a schematic diagram showing the distribution of the visual recognition and detection components of the present invention; Figure 6 This is a diagram showing the state of a set of conical reflectors on the rotating fixture of the present invention when they are inserted into the vertical mounting holes; Figure 7 This is a diagram showing the state of another set of conical reflectors on the rotating fixture of the present invention when they are inserted into the transverse mounting hole; Figure 8 This is a diagram showing the state of the hole positioner on the reverse flip tooling of the present invention when it is engaged with the transverse mounting hole; Figure 9 This is a state diagram of the present invention, showing how the rotating fixture of the present invention swings up and down to increase the image acquisition range of the upper vision camera group. Figure 10 This is a diagram showing the state of the forward-flipping fixture and the reverse-flipping fixture of the present invention when they are brought close together to transfer the product to be tested. Figure 11 This is a schematic diagram illustrating the reflective effect of the conical reflector in the vertical mounting hole of the present invention. Figure 12 This is a schematic diagram illustrating the reflective effect of the conical reflective block in the horizontal mounting hole of the present invention. Figure 13 This is a diagram showing the state of the conical reflector of the present invention moving forward in a long horizontal mounting hole; Figure 14 This is a schematic diagram of the improved cone reflector structure of the present invention; Figure 15 This is a schematic diagram showing the distribution of the concave reflector in the horizontal mounting holes of the present invention; Figure 16 This is an end view of the concave reflector of the present invention; Figure 17 This is a schematic diagram of the structure of the present invention after adding a contact structure to the tail of the concave reflector; Figure 18 This is a schematic diagram illustrating the use of a flat contact structure as the contact structure in this invention; Figure 19 This is a diagram showing the state of a protruding defect on the inner wall of a mounting hole when a direct light source illuminates the flat contact structure of the present invention.

[0019] The attached figures are labeled as follows: 1. Flip fixture assembly; 11. Forward flip fixture; 12. Reverse flip fixture; 13. Flip driver; 2. Visual recognition and detection assembly; 21. Upper visual recognition camera group; 22. Side visual recognition camera group; 23. Camera drive assembly; 3. Product under test; 31. Vertical mounting hole; 32. Horizontal mounting hole; 4. Isolation housing; 5. Hole position locator; 51. Docking seat; 52. First motion driver; 6. Hole wall reflection assembly; 61. Conical reflector; 611. Conical reflector block; 612. Connecting seat; 613. Concave reflector; 614. Edge protrusion; 62. Second moving actuator; 621. Linear drive cylinder; 622. Rotary actuator; 6221. Sliding seat; 6222. Rotary motor; 6223. Threaded rod; 63. First auxiliary lighting lamp; 64. Second auxiliary lighting lamp; 65. Contact structure; 651. Flat contact structure; 652. Direct light source. Detailed Implementation

[0020] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0021] Refer to the instruction manual appendix Figure 1 and Figure 4 A defect identification platform based on vision inspection includes a flipping fixture assembly 1 and a vision recognition and inspection assembly 2. The flipping fixture assembly 1 includes a forward flipping fixture 11 and a reverse flipping fixture 12. Both the forward flipping fixture 11 and the reverse flipping fixture 12 are controlled by a flipping driver 13 to flip their movement. The flipping driver 13 can directly use a motor structure. The rotation axes of the forward flipping fixture 11 and the reverse flipping fixture 12 are close to each other and arranged in parallel.

[0022] Both the forward-flipping fixture 11 and the reverse-flipping fixture 12 are equipped with product mating structures for supporting the product under test 3 (i.e., the automotive control arm). The forward-flipping fixture 11 is adapted to the reverse side of the product under test 3, and the reverse-flipping fixture 12 is adapted to the front side of the flipping fixture assembly 1. This ensures that when the product under test 3 is placed on the forward-flipping fixture 11, the front side faces upward, and when the product under test 3 is placed on the reverse-flipping fixture 12, the reverse side faces upward. At the same time, the forward-flipping fixture 11 and the reverse-flipping fixture 12 are also equipped with fixing structures for fixing the product under test 3, such as a vacuum adsorption structure that contacts the surface of the product under test 3, or a clamping device for the non-exposed parts of the product under test 3, to ensure that the product under test 3 can be stably placed when placed on the forward-flipping fixture 11 or the reverse-flipping fixture 12.

[0023] Refer to the instruction manual appendix Figure 10When both the forward flipping fixture 11 and the reverse flipping fixture 12 are flipped to a vertical position, the product mating structure of the reverse flipping fixture 12 corresponds to the product mating structure of the forward flipping fixture 11, and both the forward flipping fixture 11 and the reverse flipping fixture 12 simultaneously come into contact with the product 3 to be tested. Initially, the product 3 to be tested can be fixed on the reverse flipping fixture 12. After the front of the product 3 to be tested is inspected, the forward flipping fixture 11 and the reverse flipping fixture 12 are flipped simultaneously to make them both vertical. At this time, the reverse flipping fixture 12 also comes into contact with the product 3 to be tested. The fixing structure on the forward flipping fixture 11 is released from fixing the product 3 to be tested, and the fixing structure on the reverse flipping fixture 12 is controlled to fix the product 3 to be tested. The product 3 to be tested can then be transferred to the forward flipping fixture 11, thereby realizing the flipping operation of the product 3 to be tested.

[0024] Refer to the instruction manual appendix Figure 5 The visual recognition and detection component 2 includes an upper visual recognition camera group 21 and a side visual recognition camera group 22. The upper visual recognition camera group 21 is positioned above the flip fixture assembly 1 and is used to capture images of the product 3 to be tested on the forward flip fixture 11 and the reverse flip fixture 12 and perform visual recognition and detection. The side visual recognition camera group 22 is positioned on both sides of the flip fixture assembly 1 and is used to perform image recognition and detection on the side areas of the product 3 to be tested on the forward flip fixture 11 and the reverse flip fixture 12. Additionally, refer to the appendix to the instruction manual. Figure 2 The defect identification platform of the present invention also includes an isolation housing 4. The flip tooling assembly 1 and the visual recognition and detection assembly 2 are all set in the isolation housing 4. The isolation housing 4 isolates the external light source. At the same time, an illumination group that can fully illuminate the product 3 to be tested is set inside the isolation housing 4, thereby avoiding the influence of the external light source on the detection.

[0025] It should be noted that the upper visual recognition camera group 21 and the side visual recognition camera group 22 in the above solution both use commonly used visual recognition and inspection equipment. The specific installation and distribution of the visual recognition cameras are based on the actual posture of the product, and the lighting used is also a standard solution in visual recognition and inspection. Therefore, this implementation will not elaborate on this. In order to use fewer visual recognition cameras, some visual recognition cameras can also be moved. Refer to the attached manual for details. Figure 5 Furthermore, the camera driver component 23 can be configured to drive the corresponding visual recognition camera movement, such as moving or flipping, thereby enabling more comprehensive visual image acquisition and recognition of the surface condition of the product under test 3.

[0026] Refer to the instruction manual appendix Figure 4 Both the forward-flipping fixture 11 and the reverse-flipping fixture 12 are equipped with hole positioners 5 and hole wall reflective components 6 at the positions corresponding to the mounting holes on the product to be tested 3. For details, please refer to the attached instruction manual. Figure 6 and Figure 7 The hole positioner 5 includes a docking seat 51, which is slidably mounted on the forward flipping fixture 11 or the reverse flipping fixture 12. The docking seat 51 is driven by a first moving drive 52 (e.g., a cylinder) to move closer to or away from the mounting hole. The hole wall reflection assembly 6 includes a conical reflector 61 and a second moving drive 62. The conical reflector 61 has an inclined reflective surface that can reflect light, so that the corresponding external visual recognition camera can directly recognize the image information of the inner wall of the mounting hole reflected by the inclined reflective surface outside the mounting hole opening. Thus, the image information of the inner wall of the mounting hole can be recognized by means of the reflection of the conical reflector 61 without the visual recognition camera needing to be inserted into the mounting hole. The second moving drive 62 is used to drive the conical reflector 61 into or out of the mounting hole and to drive the conical reflector 61 to move along the length direction of the mounting hole inside the mounting hole.

[0027] Meanwhile, the docking seat 51 can also be provided with a locking structure for engaging with the mounting hole, such as a sleeve structure inserted into the mounting hole, or a sleeve structure fitted onto the outer wall of the mounting hole structure. This allows the docking seat 51 to effectively fix the mounting hole when it is close to it, thereby fixing the product 3 to be tested. Therefore, in this embodiment, the hole position locator 5 can also be used as part of the fixing structure. However, it should be noted that during the visual recognition detection process, the area near the opening of the mounting hole is easily recognized by the visual recognition camera. Therefore, the above-mentioned sleeve structure can be designed as a shallow sleeve structure, but it should not be too deep, so as not to affect the image reflection of the inner wall surface of the mounting hole by the cone reflector 61. In this embodiment, the hole wall reflection component 6 can be preferentially set on the docking seat 51. For example, the cone reflector 61 and the second motion driver 62 are both installed on the docking seat 51. If the hole position locator 5 is not used, a corresponding support structure can be set separately to support the corresponding hole wall reflection component 6.

[0028] It should be noted that the orientation of the mounting holes on product 3 under test is not entirely uniform; please refer to the instruction manual appendix. Figure 3 In addition to the vertical mounting hole 31, the product under test 3 also has a horizontal mounting hole 32. Therefore, when setting up the forward flipping fixture 11 and the reverse flipping fixture 12, in addition to adapting the fixing structure of the two, the hole position locator 5 and the hole wall reflector 6 should also be adjusted accordingly. For example, the hole position locator 5 and the hole wall reflector 6 corresponding to the vertical mounting hole 31 can be set vertically, while the hole position locator 5 and the hole wall reflector 6 corresponding to the horizontal mounting hole 32 should be set horizontally, and the mating seat 51 should slide horizontally, and the conical reflector 61 should also move horizontally. In particular, the mating seats 51 corresponding to the horizontal mounting hole 32 on the forward flipping fixture 11 and the reverse flipping fixture 12 should be set at both ends of the horizontal mounting hole 32 respectively. You can refer to the attached instruction manual. Figure 7 and Figure 8 ( Figure 7 It is a right-view perspective. Figure 7 To avoid interference when the product under test 3 is moved, the two ends of the horizontal mounting hole 32 should be aligned with the corresponding side visual recognition camera group 22 when fixing the product under test 3, so as to ensure that the side visual recognition camera group 22 can effectively collect and recognize the image reflected by the cone reflector 61.

[0029] Refer to the instruction manual appendix Figure 11 and Figure 12 In this embodiment, the conical reflector 61 can directly adopt a conical reflective block 611. The conical surfaces of the conical reflective block 611 are all reflective structures, thus forming a comprehensive inclined reflective surface. At this time, when a visual recognition camera is directly aligned with the opening of the mounting hole, the reflected image of the conical reflector 61 can be fully acquired, thereby recognizing the image information of the inner wall of the mounting hole, and thus quickly identifying the corresponding defects. In this solution, the second moving driver 62 can directly adopt a linear drive cylinder 621. The linear drive cylinder 621 is fixedly mounted on the docking seat 51, and the conical reflective block 611 is fixedly mounted on the output end of the linear drive cylinder 621. Thus, by using the linear drive cylinder 621 to linearly drive the conical reflective block 611, the movement control of the conical reflective block 611 can be realized, so that the conical reflective block 611 can enter and exit the mounting hole. And when the mounting hole is relatively long and the reflective area of ​​the conical reflective block 611 is insufficient, refer to the appendix of the specification. Figure 13 It can also move the conical reflector 611 within the mounting hole to achieve full image reflection.

[0030] In the above embodiment, when it is actually necessary to test the mechanical properties of the product 3 under test, the product 3 under test is first installed and fixed on the forward and reverse fixture 11. Then, the docking seat 51 on the forward and reverse fixture 11 is controlled to align with the vertical mounting hole 31 and the horizontal mounting hole 32, and the conical reflector 61 is controlled to extend into the corresponding mounting hole. Then, the visual recognition detection component 2 can be used to collect image information from the front and top of the product 3 under test, as well as from the front and back sides, thereby effectively performing image recognition. During the recognition process, the visual recognition camera on the outside only needs to collect the reflected image of the conical reflector 611 to identify the image information of the inner wall of the mounting hole. In addition, the forward and reverse fixture 11 can be flipped up and down. Refer to the attached manual. Figure 9During the flipping process, the left and right sides of the product under test 3 will be exposed to the recognition area of ​​the upper visual recognition camera group 21, thereby effectively recognizing the surface of the product under test 3 in the left and right directions. In this solution, there is no need to set up too many visual recognition cameras or control the movement of the visual recognition cameras, thus reducing costs and improving detection efficiency. After the front area of ​​the product under test 3 has been fully detected, the forward flipping fixture 11 and the reverse flipping fixture 12 can be controlled to flip and dock, transferring the product under test 3 onto the reverse flipping fixture 12. The reverse flipping fixture 12 is then controlled to flip, so that the upper visual recognition camera group 21 can be used to recognize the product under test. The reverse side of 3 is fully inspected, which reduces the number of inspection stations for the product under test 3. With more centralized inspection facilities, comprehensive and rapid surface defect inspection of the product can be carried out. In particular, when the image of the inner wall of the mounting hole is reflected by the conical reflector 61, the internal condition of the mounting hole can be fully inspected with the help of the existing visual recognition camera. The conical reflector 61 can adapt to smaller mounting holes, eliminating the need to use a separate set of visual recognition cameras to repeatedly inspect inside the mounting hole, and eliminating the need to consider size interference. In particular, the external visual recognition inspection component 2 can be used to perform inspection simultaneously, eliminating the need to consider the mutual interference between internal and external inspections, thus effectively improving the inspection efficiency.

[0031] In the above embodiments, the conical reflector 611 is mainly a fixed conical structure, which is simple in structure, but its fixed structure makes it difficult to accommodate mounting holes of different diameters. Therefore, for different products 3 to be tested, different hole wall reflective components 6 need to be set for installation, resulting in relatively high costs. To address this, this embodiment also provides the following technical solutions, which are detailed in the appendix to the specification. Figure 14 The conical reflector 61 consists of a connecting seat 612 and a concave reflector 613. The concave reflector 613 is rotatably mounted on the connecting seat 612 and is inclined relative to the length direction of the connecting seat 612. The surface of the concave reflector 613 is set as a reflective surface, which forms an inclined reflective surface. In addition, the second moving drive 62 is a screw drive 622. The screw drive 622 includes a sliding seat 6221, a rotary motor 6222, and a threaded rod 6223. A connecting seat 612 is fixedly installed at the end of the threaded rod 6223 and threadedly engaged with the docking seat 51. A sliding seat 6221 is slidably installed on the docking seat 51. A rotary motor 6222 is fixedly installed on the sliding seat 6221. The rotary motor 6222 is used to drive the threaded rod 6223 to rotate. In the process of driving the threaded rod 6223 to rotate and drive the concave reflector 613 to rotate, the concave reflector 613 can also be driven forward, thereby realizing the comprehensive acquisition of image information of the inner wall of the mounting hole.

[0032] It should be noted that the angle between the concave reflector 613 and the connecting seat 612 is adjustable. In this case, a locking structure can be set to fix the connecting seat 612, so that the conical reflector 61 can adapt to different apertures. In this case, it is only necessary to set the aperture wall reflector 6 and the aperture position locator 5 as a modular structure. When dealing with different products 3 to be tested, it is only necessary to install the aperture wall reflector 6 and the aperture position locator 5 on the corresponding tooling and adjust the tilt angle of the concave reflector 613 to adapt to the size of the mounting hole of the current product 3 to be tested. There is no need to set up a large number of conical reflector blocks 611, thereby reducing costs.

[0033] In addition, please refer to the appendix to the instruction manual. Figure 16 The concave reflector 613 is recessed, meaning that the cross-section of the concave reflector 613 is an arc-shaped structure. The central area of ​​the concave reflector 613 is recessed towards the connecting seat 612, thus forming a concave reflective structure. When it reflects the image information of the inner wall of the mounting hole, it can also form a certain magnification with the help of the concave mirror effect, making it easier to identify surface defects (such as protruding debris, cracks, pits, etc.).

[0034] Further, please refer to the appendix to the instruction manual. Figure 17 An elastic element, such as a torsion spring, can also be provided between the concave reflector 613 and the connecting seat 612. This torsion spring forms an expanding elastic force on the concave reflector 613. A contact structure 65 is provided at the end of the concave reflector 613 furthest from the connecting seat 612 (i.e., the tail end). Also, refer to the attached instruction manual. Figure 16 The concave reflector 613 has an edge protrusion 614 that protrudes beyond the reflective surface of the concave reflector 613. Therefore, in actual use, there is no need to manually adjust the angle of the concave reflector 613. When the concave reflector 613 and the connecting seat 612 are inserted into the mounting hole, the pressure from the hole wall allows the concave reflector 613 to directly enter the mounting hole. Furthermore, under the action of the elastic element, the contact structure 65 is tightly attached to the inner wall of the mounting hole, thus fixing the concave reflector 613. In addition to protecting the concave reflector 613—that is, guiding it through contact with the mounting hole structure when it enters the mounting hole, thus protecting the reflective surface—the edge protrusion 614 can also block stray light from entering the reflective area from the side of the concave reflector 613, thereby improving the detection effect.

[0035] In addition, during the rotation and forward movement of the concave reflector 613, besides the image directly reflected by the concave reflector 613 onto the inner wall surface of the mounting hole, if the contact structure 65 comes into contact with defects such as protrusions or pits on its inner wall, the concave reflector 613 will also swing accordingly. As a result, when the visual recognition camera collects the reflected image of the concave reflector 613, it will also detect the unexpected shaking, and thus determine the existence of defects, further improving the reliability of the detection results.

[0036] In the above embodiments, if the mounting hole is relatively long and an external light source cannot easily enter the mounting hole, supplementary lighting can be provided, for example, as shown in the appendix to the instruction manual. Figure 14 A first auxiliary light 63 is installed at the position of the mounting hole corresponding to the docking seat 51. The first auxiliary light 63 illuminates the inside of the mounting hole directly. In addition, a second auxiliary light 64 can be installed on the connecting seat 612 to form more diffuse reflection of light inside the mounting hole during use, so as to ensure that the image inside the mounting hole is clear.

[0037] However, since the external visual recognition camera is directly facing the opening of the mounting hole, and the aforementioned first auxiliary light 63 is on the opposite side of the connector 612, to avoid excessive light affecting image acquisition, the light intensity of the first auxiliary light 63 and the second auxiliary light 64 should not be too high. This is to avoid an excessively large image light ratio that would affect the recognition of the image reflected by the concave reflector 613. (Refer to the attached instruction manual.) Figure 18 and Figure 19 The contact structure 65 includes a flat contact structure 651, which is a cylindrical structure. The flat contact structure 651 is rotatably installed in the tail of the concave reflector 613. When the connecting seat 612 enters the inner wall of the mounting hole, the front and rear ends of the flat contact structure 651 contact the inner wall of the mounting hole, thereby playing a limiting role. In addition, a direct light source 652 is provided at the forward end of the flat contact structure 651 corresponding to the concave reflector 613 (i.e., the end near the front end of the concave reflector 613). The direct light source 652 is used to emit light forward close to the inner wall of the mounting hole, thereby providing auxiliary illumination to the inner wall of the mounting hole near the area of ​​the concave reflector 613. Especially when there is a protruding defect in the inner wall of the mounting hole, under the action of the above-mentioned light source, a shadow can be formed on the side of the protruding defect away from the light source, thereby making the defect easier to identify. A torsional elastic element can also be provided between the flat contact structure 651 and the contact structure 65 to ensure the initial posture of the flat contact structure 651 and prevent interference between the flat contact structure 651 and the mounting hole structure when the concave reflector 613 enters the mounting hole. The first auxiliary lighting lamp 63, the second auxiliary lighting lamp 64 and the direct light source 652 do not require strong light intensity. Therefore, a simple LED light-emitting structure with a corresponding light guide structure is sufficient.

[0038] It should be noted that the above solution mainly introduces the product testing solution. The loading and unloading of the product to be tested 3 can be done manually, or the defect identification platform can be connected to the product production line to realize the automatic loading and unloading of the product to be tested 3 with the help of mechanized equipment such as robotic arms, so as to carry out online product testing.

[0039] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A defect identification platform based on visual inspection, comprising a flip tooling assembly (1) and a visual recognition and inspection assembly (2), characterized in that: The flipping fixture assembly (1) includes a forward flipping fixture (11) and a reverse flipping fixture (12), both of which are controlled by a flipping driver (13) to perform flipping motion. The forward flipping fixture (11) and the reverse flipping fixture (12) are also provided with fixing structures for fixing the product to be tested (3); Both the forward flipping fixture (11) and the reverse flipping fixture (12) are provided with hole wall reflective components (6) at the positions corresponding to the mounting holes on the product to be tested (3). The hole wall reflective components (6) include a conical reflector (61) and a second moving driver (62). The conical reflector (61) has an inclined reflective surface that can reflect light. The second moving driver (62) is used to drive the conical reflector (61) to enter or leave the mounting hole and to drive the conical reflector (61) to move along the length of the mounting hole inside the mounting hole. The defect identification platform also includes an isolation chassis (4). The flip tooling assembly (1) and the visual recognition detection assembly (2) are both located in the isolation chassis (4). The visual recognition detection assembly (2) includes an upper visual recognition camera group (21), a side visual recognition camera group (22), and a camera drive assembly (23). The upper visual recognition camera group (21) is located above the flip tooling assembly (1), and the side visual recognition camera group (22) is located on both sides of the flip tooling assembly (1). The camera drive assembly (23) is used to drive the corresponding visual recognition cameras in the upper visual recognition camera group (21) and the side visual recognition camera group (22) to move.

2. The defect recognition platform based on visual inspection according to claim 1, characterized in that: Both the forward flipping fixture (11) and the reverse flipping fixture (12) are provided with product mating structures for supporting the product to be tested (3). The forward flipping fixture (11) is adapted to the reverse side of the product to be tested (3), and the reverse flipping fixture (12) is adapted to the front side of the flipping fixture assembly (1). When both the forward flipping fixture (11) and the reverse flipping fixture (12) are flipped to the vertical state, the forward flipping fixture (11) and the reverse flipping fixture (12) simultaneously come into contact with the product to be tested (3).

3. The defect identification platform based on visual inspection according to claim 2, characterized in that: The fixing structure includes a hole position locator (5), which is set to correspond to the mounting hole on the product to be tested (3). The hole position locator (5) includes a docking seat (51), which is driven by a first moving driver (52) to move closer to or away from the mounting hole. The hole wall reflector (6) is mounted on the docking seat (51).

4. The defect recognition platform based on visual inspection according to claim 3, characterized in that: The conical reflector (61) is a conical reflective block (611). The conical surface of the conical reflective block (611) is set as a reflective structure to form an inclined reflective surface. The second moving driver (62) can directly adopt a linear drive cylinder (621). The linear drive cylinder (621) is fixedly installed on the docking seat (51). The conical reflective block (611) is fixedly installed at the output end of the linear drive cylinder (621).

5. A defect identification platform based on visual inspection according to claim 3, characterized in that: The conical reflector (61) consists of a connecting seat (612) and a concave reflector (613). The concave reflector (613) is rotatably mounted on the connecting seat (612), and the concave reflector (613) is inclined relative to the length direction of the connecting seat (612). The surface of the concave reflector (613) is set as a reflective surface, which forms an inclined reflective surface.

6. A defect identification platform based on visual inspection according to claim 5, characterized in that: The second moving drive (62) is a screw drive (622), which includes a sliding seat (6221), a rotary motor (6222), and a threaded rod (6223). The threaded rod (6223) passes through the mating seat (51) and is threadedly engaged with the mating seat (51). The connecting seat (612) is fixedly installed at the end of the threaded rod (6223). The sliding seat (6221) is slidably installed on the mating seat (51). The rotary motor (6222) is fixedly installed on the sliding seat (6221) and is used to drive the threaded rod (6223) to rotate.

7. A defect identification platform based on visual inspection according to claim 6, characterized in that: An elastic element is provided between the concave reflector (613) and the connecting seat (612), which forms an expanding elastic force on the concave reflector (613). A contact structure (65) is provided at the end of the concave reflector (613) away from the connecting seat (612).

8. A defect identification platform based on visual inspection according to claim 7, characterized in that: The contact structure (65) includes a flat contact structure (651), which is a cylindrical structure. The flat contact structure (651) is rotatably installed in the tail of the concave reflector (613). When the connecting seat (612) enters the inner wall of the mounting hole, the front and rear ends of the flat contact structure (651) form contact with the inner wall of the mounting hole. The flat contact structure (651) is provided with a direct light source (652) at the forward end of the concave reflector (613). The direct light source (652) is used to fit against the inner wall of the mounting hole and emit light forward.

9. A defect identification platform based on visual inspection according to claim 8, characterized in that: The concave reflector (613) has an arc-shaped cross-section. The central area of ​​the concave reflector (613) is recessed towards the connecting seat (612). The edge of the concave reflector (613) is provided with an edge protrusion (614), which protrudes beyond the reflective surface of the concave reflector (613).

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