A defect recognition platform based on visual inspection

Abstract

This invention discloses a defect identification platform based on visual inspection, specifically relating to the field of visual recognition inspection. It includes a flipping fixture assembly and a visual recognition inspection component. The flipping fixture assembly comprises a forward flipping fixture and a reverse flipping fixture, both controlled by a flipping driver. Each of the forward and reverse flipping fixtures has a hole wall reflector component positioned at a location corresponding to a mounting hole on the product under test. The hole wall reflector component includes a conical reflector and a second motion driver. The conical reflector has an inclined reflective surface capable of reflecting light. This invention simultaneously acquires images of the outer surface of the product under test using an external visual recognition camera and the reflected image from the conical reflector, thus identifying the inner wall image information of the mounting hole. This eliminates the need for excessive visual recognition cameras and their movement, thereby reducing costs and improving inspection efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of visual recognition detection, more particularly, the present application relates to a defect identification platform based on visual detection. BACKGROUND

[0002] With the continuous improvement of modern industrial automation level, product quality control plays a vital role in the manufacturing process. Its basic principle is to obtain the image of the measured object by industrial camera, and to process and analyze the image by computer vision algorithm, so as to realize the functions of size measurement, positioning, identification, defect detection, etc.

[0003] In the automobile production industry, many automobile structural parts also use visual detection technology to detect the surface defects of products. For conventional products, such as panels, door panels and other flat and uniform structure products, a large amount of area picture information can be collected at one time by industrial camera, and the overall surface quality of the product can be quickly judged, but for some products with complex structure and many detection positions, multiple visual recognition cameras are needed for multi-directional and multi-angle visual recognition detection. For example, for automobile control arms, enough visual recognition cameras are needed to fully collect and identify the images of each surface of the product.

[0004] Among them, the main function of automobile control arm is to connect the wheel and the body, and the corresponding mounting hole is arranged on the structure itself to facilitate the installation of shaft sleeve and ball pin structure, and the quality of the mounting hole also needs to be strictly guaranteed. In the prior art, multi-station visual recognition detection is often used to identify images at different positions of the product, but for such hole structures, although the relative angle between the visual recognition camera and the product can be changed, especially when detecting the mounting hole, the corresponding visual recognition camera needs to be inserted into the hole for detection, but due to space limitation, the visual recognition camera is difficult to directly aim at the inner wall of the hole, which requires the operator to repeatedly adjust for detection, not only the detection efficiency is relatively low, but also the human operation may cause missed detection, affecting the detection effect. SUMMARY

[0005] The defect identification platform based on visual detection provided by the present application solves the problem that in the prior art, multi-station visual recognition detection is often used, especially when detecting the mounting hole, the corresponding visual recognition camera needs to be inserted into the hole for detection, but due to space limitation, the visual recognition camera is difficult to directly aim at the inner wall of the hole, which requires the operator to repeatedly adjust for detection, not only the detection efficiency is relatively low, but also the human operation may cause missed detection, affecting the detection effect.

[0006] To achieve the above object, the application provides the following technical scheme: a defect identification platform based on visual detection, comprising a turnover tool assembly and a visual identification detection assembly, the turnover tool assembly comprising a normal turnover tool and an inverse turnover tool, both the normal turnover tool and the inverse turnover tool being controlled by a turnover driver to turn over;

[0007] The normal turnover tool and the inverse turnover tool are further provided with fixing structures for fixing the product to be tested.

[0008] The normal turnover tool and the inverse turnover tool are further provided with hole wall reflection assemblies at positions corresponding to the mounting holes on the product to be tested, the hole wall reflection assembly comprising a conical reflector and a second movement driver, the conical reflector having an inclined reflection surface capable of reflecting light, and the second movement driver being used to drive the conical reflector to enter or leave the inside of the mounting hole and to move along the length direction of the mounting hole inside the mounting hole.

[0009] Preferably, the defect identification platform further comprises an isolation cabinet, the turnover tool assembly and the visual identification detection assembly are arranged in the isolation cabinet, the visual identification detection assembly comprises an upper visual identification camera group, a side visual identification camera group and a camera driving assembly, the upper visual identification camera group is arranged above the turnover tool assembly, the side visual identification camera group is arranged on both sides of the turnover tool assembly, and the camera driving assembly is used to drive the corresponding visual identification cameras in the upper visual identification camera group and the side visual identification camera group to move.

[0010] Preferably, the normal turnover tool and the inverse turnover tool are both provided with product matching structures for supporting the product to be tested, the normal turnover tool is adapted to the reverse side of the product to be tested, the inverse turnover tool is adapted to the front side of the turnover tool assembly, and the normal turnover tool and the inverse turnover tool simultaneously form contact with the product to be tested when both the normal turnover tool and the inverse turnover tool are turned to the vertical state.

[0011] Preferably, the fixing structure comprises a hole position locator, the hole position locator is arranged corresponding to the mounting hole on the product to be tested, the hole position locator comprises a butt joint seat, the butt joint seat is driven by a first movement driver to move close to or away from the mounting hole, and the hole wall reflection assembly is mounted on the butt joint seat.

[0012] Preferably, the conical reflector is a conical reflector block, the conical surface of the conical reflector block is arranged as a light-reflecting structure to form the inclined reflection surface, and the second movement driver can directly adopt a linear drive air cylinder, the linear drive air cylinder is fixedly installed on the butt joint seat, and the conical reflector block is fixedly installed on the output end of the linear drive air cylinder.

[0013] Preferably, the conical reflector is composed of a connecting seat and a concave reflector plate, the concave reflector plate is rotatably installed on the connecting seat, and the length direction of the concave reflector plate is arranged obliquely relative to the connecting seat, the surface of the concave reflector plate is arranged as a light-reflecting surface, and the light-reflecting surface forms the inclined reflection surface.

[0014] Preferably, the second mobile driver is a screwing driver, which comprises a sliding seat, a rotating motor and a threaded rod, the threaded rod penetrates the butt joint seat and is in threaded cooperation with the butt joint seat, the connecting seat is fixedly installed at the end of the threaded rod, the sliding seat is slidingly installed on the butt joint seat, and the rotating motor is fixedly installed on the sliding seat and is used to drive the threaded rod to rotate.

[0015] Preferably, an elastic member is arranged between the concave reflector and the connecting seat, the elastic member forms an expansion elastic force on the concave reflector, and a contact structure is arranged at the end of the concave reflector away from the connecting seat.

[0016] Preferably, the contact structure comprises a flat contact structure, the flat contact structure is a columnar structure, the flat contact structure is rotatably installed at 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 are in contact with the inner wall of the mounting hole, a direct light source is arranged at the end of the flat contact structure corresponding to the front of the concave reflector, and the direct light source is used to adhere to the inner wall of the mounting hole and emit light sources forward.

[0017] Preferably, the cross section of the concave reflector is an arc structure, the middle region of the concave reflector is concave to the direction of the connecting seat, and an edge convex strip is arranged at the edge of the concave reflector and protrudes from the reflecting surface of the concave reflector.

[0018] The present application has the advantages that:

[0019] 1. The visual identification camera on the outer side can collect the image of the outer surface of the product to be tested and the reflected image of the conical reflector at the same time, so as to identify the image information of the inner wall of the mounting hole. In addition, the positive overturning tool can be overturned up and down to effectively identify more surfaces of the product to be tested, without the need to set too many visual identification cameras and control the movement of the visual identification cameras, thereby reducing the cost and improving the detection efficiency.

[0020] 2. The angle between the concave reflector and the connecting seat can be adjusted, so that the conical reflector can adapt to different hole diameters. In addition, the middle region of the concave reflector is concave to the direction of the connecting seat, thereby forming a concave reflection structure. When reflecting the image information of the inner wall of the mounting hole, the effect of the concave mirror can also form a certain magnification, thereby more easily identifying surface defects. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a schematic diagram of the structure of the isolation case of the present application;

[0023] Figure 3 Structure diagram of the product to be tested of the present application;

[0024] Figure 4 Structure diagram of the turnover tool assembly of the present application;

[0025] Figure 5 Distribution diagram of the visual recognition detection assembly of the present application;

[0026] Figure 6 Diagram of the state when a group of conical reflectors on the positive turnover tool enter into vertical mounting holes;

[0027] Figure 7 Diagram of the state when another group of conical reflectors on the positive turnover tool enter into horizontal mounting holes;

[0028] Figure 8 Diagram of the state when the hole position locator on the negative turnover tool cooperates with the horizontal mounting hole;

[0029] Figure 9 Diagram of the state when the positive turnover tool swings downward to increase the image acquisition range of the upper visual camera group;

[0030] Figure 10 Diagram of the state when the positive turnover tool and the negative turnover tool approach each other to transfer the product to be tested;

[0031] Figure 11 Diagram of the light reflection effect of the conical light reflection block in the vertical mounting hole;

[0032] Figure 12 Diagram of the light reflection effect of the conical light reflection block in the horizontal mounting hole;

[0033] Figure 13 Diagram of the state when the conical light reflection block moves forward in the longer horizontal mounting hole;

[0034] Figure 14 Diagram of the structure of the improved conical reflector of the present application;

[0035] Figure 15 Diagram of the distribution state of the concave light reflection plate in the horizontal mounting hole of the present application;

[0036] Figure 16 End view of the concave light reflection plate of the present application;

[0037] Figure 17 Diagram of the structure of the present application after adding a contact structure at the tail of the concave light reflection plate;

[0038] Figure 18 Diagram of the present application using a flat contact structure as the contact structure;

[0039] Figure 19 Figure 1 is a state diagram of the flat contact structure of the present application when a straight light source is used to irradiate the protruding defects on the inner wall of the mounting hole.

[0040] The figure is: 1, the turnover tool assembly; 11, the positive turnover tool; 12, the negative turnover tool; 13, the turnover driver; 2, the visual identification detection assembly; 21, the upper visual identification camera group; 22, the side visual identification camera group; 23, the camera driving assembly; 3, the product to be tested; 31, the vertical mounting hole; 32, the horizontal mounting hole; 4, the isolation cabinet; 5, the hole position locator; 51, the docking seat; 52, the first moving driver; 6, the hole wall reflection assembly; 61, the conical reflector; 611, the conical reflector; 612, the connecting seat; 613, the concave reflector; 614, the edge convex strip; 62, the second moving driver; 621, the linear drive cylinder; 622, the screw-in driver; 6221, the sliding seat; 6222, the rotary motor; 6223, the threaded rod; 63, the first auxiliary lighting lamp; 64, the second auxiliary lighting lamp; 65, the contact structure; 651, the flat contact structure; 652, the straight light source. DETAILED DESCRIPTION

[0041] The following detailed description of the application will be further described with reference to the accompanying drawings, it is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the scope of protection of the application, and those skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.

[0042] Refer to the description of the accompanying Figure 1 And Figure 4 A defect identification platform based on visual detection includes a turnover tool assembly 1 and a visual identification detection assembly 2, the turnover tool assembly 1 includes a positive turnover tool 11 and a negative turnover tool 12, the positive turnover tool 11 and the negative turnover tool 12 are controlled by the turnover driver 13 to rotate, the turnover driver 13 can directly use the motor structure, and the rotation axes of the positive turnover tool 11 and the negative turnover tool 12 are close to each other and parallelly arranged.

[0043] The product matching structure for supporting the product to be tested 3 (i.e. the automobile control arm) is arranged on the positive turnover tool 11 and the negative turnover tool 12, wherein the positive turnover tool 11 is matched with the reverse side of the product to be tested 3, and the negative turnover tool 12 is matched with the front side of the turnover tool assembly 1, so that when the product to be tested 3 is placed on the positive turnover tool 11, the front side faces upward, and when the product to be tested 3 is placed on the negative turnover tool 12, the reverse side faces upward. In addition, the fixing structure for fixing the product to be tested 3 is arranged on the positive turnover tool 11 and the negative turnover tool 12, for example, the vacuum adsorption structure in contact with the surface of the product to be tested 3, or the clamping device for the non-exposed part of the product to be tested 3, so as to ensure that the product to be tested 3 can be stably placed on the positive turnover tool 11 or the negative turnover tool 12.

[0044] Referring to the drawings Figure 10 When the positive turnover tool 11 and the negative turnover tool 12 are both turned to the vertical state, the product matching structure of the negative turnover tool 12 corresponds to the product matching structure of the positive turnover tool 11, and the positive turnover tool 11 and the negative turnover tool 12 simultaneously form contact with the product to be tested 3. Initially, the product to be tested 3 can be fixed on the negative turnover tool 12, and after the front side of the product to be tested 3 is detected, the positive turnover tool 11 and the negative turnover tool 12 are simultaneously turned to the vertical state. At this time, the negative turnover tool 12 also forms contact with the product to be tested 3, the fixing structure on the positive turnover tool 11 is released to fix the product to be tested 3, and the fixing structure on the negative turnover tool 12 is controlled to fix the product to be tested 3. That is, the product to be tested 3 can be transferred to the positive turnover tool 11, and the turnover operation of the product to be tested 3 is realized.

[0045] Referring to the drawings Figure 5 The visual identification detection assembly 2 includes an upper visual identification camera group 21 and a side visual identification camera group 22. The upper visual identification camera group 21 is arranged above the turnover tool assembly 1, and is used for collecting the image of the product to be tested 3 on the positive turnover tool 11 and the negative turnover tool 12 downward and performing visual identification detection. The side visual identification camera group 22 is arranged on both sides of the turnover tool assembly 1, and is used for performing image identification detection on the side area of the product to be tested 3 on the positive turnover tool 11 and the negative turnover tool 12. Figure 2 The defect identification platform further includes an isolation cabinet 4. The turnover tool assembly 1 and the visual identification detection assembly 2 are arranged in the isolation cabinet 4. The isolation cabinet 4 is used for cutting off the external light source, and a lamp group capable of fully illuminating the product to be tested 3 is arranged in the isolation cabinet 4, so as to avoid the influence of the external light source on the detection.

[0046] It should be noted that the above scheme is about the upper visual recognition camera group 21 and the side visual recognition camera group 22, which are both common visual recognition detection equipment. The specific visual recognition camera installation, distribution, etc. are distributed and set according to the actual product attitude, including the use of lighting, which is also a common scheme in visual recognition detection. Therefore, this embodiment will not be explained in detail. In order to use fewer visual recognition cameras, part of the visual recognition cameras can also be driven to move. Refer to the accompanying drawings Figure 5 The camera driving assembly 23 can also be provided to drive the corresponding visual recognition camera to move, such as moving, turning, etc., so as to more fully collect and recognize the visual image of the surface of the product to be tested 3.

[0047] Refer to the accompanying drawings Figure 4 The hole position locator 5 and the hole wall reflection assembly 6 are provided at positions corresponding to the mounting hole of the product to be tested 3 on the positive turning tool 11 and the negative turning tool 12. Specifically, refer to the accompanying drawings Figure 6 and Figure 7 The hole position locator 5 includes a docking seat 51, which is slidingly installed on the positive turning tool 11 or the negative turning tool 12. The docking seat 51 is driven by a first moving driver 52 (such as a pneumatic cylinder) to move close to or away from the mounting hole. The hole wall reflection assembly 6 includes a conical reflector 61 and a second moving driver 62. The conical reflector 61 has an inclined reflective surface that can reflect light. In this way, 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, so that the visual recognition camera does not need to extend into the mounting hole, but can recognize the image information of the inner wall of the mounting hole by means of the reflection of the conical reflector 61. The second moving driver 62 is used to drive the conical reflector 61 to enter or exit the inside 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.

[0048] Meanwhile, the docking seat 51 can also be provided with a clamping structure for clamping with the mounting hole, such as a plug sleeve structure inserted into the mounting hole, or a sleeve structure sleeved on the outer wall of the mounting hole structure, so that the docking seat 51 can effectively fix the mounting hole when approaching the mounting hole, thereby realizing the fixation of the product to be tested 3. Therefore, in the embodiment, the hole position locator 5 can also be part of the fixing structure, but it should be noted that in the visual recognition detection process, the area near the mounting hole close to the hole is easy to be recognized by the visual recognition camera. Therefore, the above-mentioned sleeve structure can be designed as a relatively shallow plug sleeve structure, but it should not be too deep, thereby affecting the image reflection of the conical reflector 61 on the inner wall surface of the mounting hole. In the embodiment, the hole wall reflection assembly 6 can be preferentially arranged on the docking seat 51, for example, the conical reflector 61 and the second moving driver 62 are both arranged on the docking seat 51. If the hole position locator 5 is not used, a corresponding supporting structure can be separately arranged to support the corresponding hole wall reflection assembly 6.

[0049] It should be noted that the posture of the mounting hole on the product to be tested 3 is not completely uniform. Referring to the drawings Figure 3 , the mounting hole on the product to be tested 3 has a horizontal mounting hole 32 in addition to the vertical mounting hole 31. Therefore, when the positive inversion tool 11 and the negative inversion tool 12 are arranged, in addition to the adaptive change of the fixing structure of the two, the hole position locator 5 and the hole wall reflection assembly 6 should also be adjusted accordingly. For example, the hole position locator 5 and the hole wall reflection assembly 6 corresponding to the vertical mounting hole 31 can be directly arranged vertically, and the hole position locator 5 and the hole wall reflection assembly 6 corresponding to the horizontal mounting hole 32 should be arranged horizontally, and the docking seat 51 should slide horizontally, and the conical reflector 61 should also move horizontally. Especially for the docking seats 51 corresponding to the horizontal mounting hole 32 on the positive inversion tool 11 and the negative inversion tool 12, they should be arranged at the two ends of the horizontal mounting hole 32, which can be compared with Figure 7 and Figure 8 ( Figure 7 is the right view angle, Figure 7 is the left view angle), so as to avoid interference when the product to be tested 3 is transferred. When the product to be tested 3 is fixed, the two ends of the horizontal mounting hole 32 should be preferentially aligned with the corresponding side visual recognition camera group 22, so as to ensure that the side visual recognition camera group 22 can effectively collect and recognize the picture reflected by the conical reflector 61.

[0050] Referring to the drawings Figure 11 and Figure 12In 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.

[0051] 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 9In the process of up-down flipping, the left and right sides of the product 3 to be tested are also exposed to the identification area of the upper visual identification camera group 21, so that the surfaces of the product 3 to be tested in the left and right directions are effectively identified. In this scheme, it is not necessary to set too many visual identification cameras, and it is not necessary to control the movement of the visual identification cameras too much, so as to reduce the cost and improve the detection efficiency. When the front area of the product 3 to be tested is fully detected, the positive flipping tool 11 and the reverse flipping tool 12 are controlled to be flipped and docked, the product 3 to be tested is transferred to the reverse flipping tool 12, and the reverse flipping tool 12 is flipped to fully detect the back of the product 3 to be tested by means of the upper visual identification camera group 21. Thus, the detection station of the product 3 to be tested can be reduced, the detection facilities can be concentrated, the product surface defect detection can be fully and quickly performed, especially in the case that the image of the inner wall of the mounting hole is reflected by means of the conical reflector 61, the existing visual identification camera can be used to fully detect the inside of the mounting hole, and the conical reflector 61 can adapt to smaller mounting holes. It is not necessary to use a group of visual identification cameras to repeatedly detect the mounting hole, and it is not necessary to consider the size interference. Especially, the external visual identification detection assembly 2 can be used to synchronously detect, and it is not necessary to consider the mutual interference of internal and external detection, so that the detection efficiency is effectively improved.

[0052] In the above embodiment, the conical reflector 61 is mainly a fixed conical structure, which has a simple structure, but the structure is fixed and difficult to adapt to mounting holes of different diameters. Therefore, different hole wall reflection assemblies 6 need to be set for different products 3 to be tested, so the cost is relatively high. Therefore, the present embodiment further provides the following technical scheme. Specifically, refer to the drawings Figure 14 The conical reflector 61 is composed of a connecting seat 612 and a concave reflector plate 613. The concave reflector plate 613 is rotatably installed on the connecting seat 612, and the length direction of the concave reflector plate 613 is inclined relative to the connecting seat 612. The surface of the concave reflector plate 613 is provided as a reflective surface, which forms an inclined reflection surface. In addition, the second moving driver 62 is a screw-in driver 622, which includes a sliding seat 6221, a rotary motor 6222 and a threaded rod 6223. The threaded rod 6223 penetrates the docking seat 51 and is threadedly connected with the docking seat 51. The connecting seat 612 is fixedly installed on the end of the threaded rod 6223. The sliding seat 6221 is slidably installed on the docking seat 51. The 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 driving the concave reflector plate 613 to rotate, the concave reflector plate 613 can also be driven to move forward, so as to fully collect the image information of the inner wall of the mounting hole.

[0053] It should be noted that the angle between the concave reflector 613 and the connecting seat 612 is adjustable, at this time, a fastening structure can be provided to fix the connecting seat 612, so that the conical reflector 61 can adapt to different apertures, at this time, only the hole wall reflection assembly 6 and the hole position locator 5 are set as a modular structure, when facing different products to be tested 3, only the hole wall reflection assembly 6 and the hole position locator 5 are installed on the corresponding tool, and the inclination angle of the concave reflector 613 is adjusted, so that the size of the mounting hole of the current product to be tested 3 can be adapted, without setting more specifications of the conical reflector 611, thereby relatively reducing the cost.

[0054] In addition, referring to the drawings Figure 16 , the concave reflector 613 is concave, that is, the cross section of the concave reflector 613 is arc-shaped structure, the middle region of the concave reflector 613 is concave to the direction of the connecting seat 612, thereby forming a concave reflection structure, when reflecting the image information of the inner wall of the mounting hole, by means of the effect of the concave mirror, a certain magnification can also be formed, thereby more easily identifying surface defect problems (such as protruding impurities or cracks, pits, etc.).

[0055] Further, referring to the drawings Figure 17 , the concave reflector 613 and the connecting seat 612 can also be provided with a elastic member, such as a torsion spring, which forms an expanding elastic force on the concave reflector 613, the end (i.e. tail end) of the concave reflector 613 away from the connecting seat 612 is provided with a contact structure 65, and referring to the drawings Figure 16 , the edge of the concave reflector 613 is provided with an edge protruding strip 614, which protrudes from the reflecting surface of the concave reflector 613, thereby in actual use, the angle of the concave reflector 613 does not need to be adjusted manually, when the concave reflector 613 and the connecting seat 612 are inserted into the mounting hole, by means of the extrusion of the hole wall on the concave reflector 613, the concave reflector 613 can be directly inserted into the mounting hole, and under the action of the elastic member, the contact structure 65 is tightly attached to the inner wall of the mounting hole, thereby forming a fixation of the concave reflector 613, and in addition to the protection of the concave reflector 613, that is, when the concave reflector 613 enters the mounting hole, the edge protruding strip 614 is in contact with the mounting hole structure to guide, forming protection of the reflecting surface, the edge protruding strip 614 can also block stray light entering the reflecting surface area of the concave reflector 613 from the side, thereby improving the detection effect.

[0056] In addition, in the process of rotating forward of the concave reflector 613, in addition to directly reflecting the image of the inner wall surface of the mounting hole through the concave reflector 613, if the contact structure 65 contacts the defects such as protrusions, pits and the like of the inner wall, it will also cause the concave reflector 613 to oscillate correspondingly, and when the visual recognition camera collects the reflected image of the concave reflector 613, it will also recognize the unexpected jitter, and thus the existence of the defects can be judged, further improving the reliability of the detection result.

[0057] In the above embodiment, if the length of the mounting hole is relatively large, the external light source is not easy to enter the inside of the mounting hole, at this time, light supplement can also be performed, for example, referring to the first auxiliary lighting lamp 63 provided on the connecting seat 612 corresponding to the position of the mounting hole, and directly irradiating the inside of the mounting hole by means of the first auxiliary lighting lamp 63, in addition, a second auxiliary lighting lamp 64 can also be installed on the connecting seat 612, so that more light is diffusely reflected in the mounting hole during use, to ensure that the image of the inner wall of the mounting hole is clear. Figure 14

[0058] However, since the external visual recognition camera is directly opposite the hole of the mounting hole, and the above-mentioned first auxiliary lighting lamp 63 is in the opposite direction of the connecting seat 612, in order to avoid forming too much light and affecting image acquisition, the light intensity of the above-mentioned first auxiliary lighting lamp 63 and the second auxiliary lighting lamp 64 should not be too high, to avoid affecting the recognition of the reflected image of the concave reflector 613 due to too large image light ratio. Referring to the first auxiliary lighting lamp 63 provided on the connecting seat 612 corresponding to the position of the mounting hole, and directly irradiating the inside of the mounting hole by means of the first auxiliary lighting lamp 63, in addition, a second auxiliary lighting lamp 64 can also be installed on the connecting seat 612, so that more light is diffusely reflected in the mounting hole during use, to ensure that the image of the inner wall of the mounting hole is clear. Figure 18 Figure 19 The contact structure 65 includes a flat contact structure 651, which is a columnar structure, and 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 are in contact with the inner wall of the mounting hole, thereby playing a limiting role of the contact structure 65. In addition, the flat contact structure 651 is provided with a direct light source 652 corresponding to one end of the concave reflector 613 (i.e. the end close to the front end of the concave reflector 613), which is used to abut against the inner wall of the mounting hole and emit light forward, thereby being able to assist in illuminating the part of the inner wall of the mounting hole close to the area of the concave reflector 613, especially when the inner wall of the mounting hole has protruding defects, under the action of the above-mentioned light source, a shadow can be formed on the side of the protruding defects away from the light source, thereby making the defects more easily recognized. The flat contact structure 651 and the contact structure 65 can also be provided with a torsional elastic member, which is used to ensure the initial attitude of the flat contact structure 651, to avoid 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 combined with a corresponding light guide structure can be used.​​

[0059] It should be noted that the above scheme is mainly the introduction of the product detection scheme, and the feeding and discharging of the product to be detected 3 can be manually operated, or the defect recognition platform can be connected to the product production line to realize the automatic feeding and discharging of the product to be detected 3 by mechanical arm and other mechanical equipment, so as to realize online detection of the product.

[0060] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application.

Claims

1. A vision detection based defect identification platform comprising a flip tool assembly (1) and a vision identification detection assembly (2), characterized in that: The turnover tool assembly (1) comprises a positive turnover tool (11) and a negative turnover tool (12), and the positive turnover tool (11) and the negative turnover tool (12) are controlled to turn over by a turnover driver (13); The positive turnover tool (11) and the negative turnover tool (12) are further provided with a fixing structure for fixing the product (3) to be tested; The positive turnover tool (11) and the negative turnover tool (12) are provided with a hole wall reflection assembly (6) at a position corresponding to the mounting hole of the product (3) to be tested, the hole wall reflection assembly (6) comprises a conical reflector (61) and a second movement driver (62), the conical reflector (61) has an inclined reflection surface capable of reflecting light, and the second movement driver (62) is used to drive the conical reflector (61) to enter or leave the inside of the mounting hole and to move along the length direction of the mounting hole in the inside of the mounting hole; The defect identification platform further comprises an isolation cabinet (4), and the turnover tool assembly (1) and the visual identification detection assembly (2) are arranged in the isolation cabinet (4); the visual identification detection assembly (2) comprises an upper visual identification camera group (21), a side visual identification camera group (22) and a camera driving assembly (23); the upper visual identification camera group (21) is arranged above the turnover tool assembly (1); the side visual identification camera group (22) is arranged on both sides of the turnover tool assembly (1); and the camera driving assembly (23) is used to drive the corresponding visual identification cameras in the upper visual identification camera group (21) and the side visual identification camera group (22) to move; The conical reflector (61) is composed of a connecting seat (612) and a concave reflector (613), the concave reflector (613) is rotatably arranged on the connecting seat (612), and the length direction of the concave reflector (613) is inclined relative to the connecting seat (612); and the surface of the concave reflector (613) is provided as a light-reflecting surface, which forms the inclined reflection surface. The second movement driver (62) is a screw-in driver (622), which comprises a sliding seat (6221), a rotary motor (6222) and a threaded rod (6223); the threaded rod (6223) penetrates through the butt joint seat (51) and is threadedly connected with the butt joint seat (51); the connecting seat (612) is fixedly arranged at the end of the threaded rod (6223); the sliding seat (6221) is slidably arranged on the butt joint seat (51); and the rotary motor (6222) is fixedly arranged on the sliding seat (6221) and is used to drive the threaded rod (6223) to rotate. An elastic member is arranged between the concave reflector (613) and the connecting seat (612), which provides an expansion elastic force to the concave reflector (613); and a contact structure (65) is arranged at the end of the concave reflector (613) away from the connecting seat (612).

2. The defect identification platform based on visual inspection as claimed in claim 1, wherein: The positive turnover tool (11) and the negative turnover tool (12) are provided with product matching structures for supporting the product (3) to be tested, the positive turnover tool (11) is matched with the reverse side of the product (3) to be tested, the negative turnover tool (12) is matched with the front side of the turnover tool assembly (1), when the positive turnover tool (11) and the negative turnover tool (12) are both turned to the vertical state, the positive turnover tool (11) and the negative turnover tool (12) are in contact with the product (3) to be tested at the same time.

3. The defect identification platform based on visual inspection as claimed in claim 2, wherein: The fixing structure comprises a hole position locator (5) corresponding to the mounting hole on the product (3) to be tested, the hole position locator (5) comprises a docking seat (51) driven by a first movement driver (52) to move close to or away from the mounting hole, and the hole wall reflection assembly (6) is installed on the docking seat (51).

4. The defect identification platform based on visual inspection as claimed in claim 3, wherein: The contact structure (65) comprises a flat contact structure (651), which is a columnar structure, the flat contact structure (651) is rotationally 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) are in contact with the inner wall of the mounting hole, the flat contact structure (651) is provided with a direct light source (652) corresponding to the front end of the concave reflector (613), and the direct light source (652) is used for adhering to the inner wall of the mounting hole and emitting light sources forward.

5. The defect identification platform based on visual inspection as claimed in claim 4, wherein: The cross section of the concave reflector (613) is an arc structure, the middle region of the concave reflector (613) is concave inward to the direction of the connecting seat (612), and the edge of the concave reflector (613) is provided with an edge convex strip (614) which protrudes from the reflecting surface of the concave reflector (613).

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