Appearance defect detection apparatus

Abstract

The utility model relates to a kind of machine vision detection equipment, in particular to a kind of appearance defect detection equipment.The appearance defect detection equipment includes strip light source, area light source, detection camera and transparent product placement platform, multiple strip light sources are provided around the product placement platform, along the height direction of the appearance defect detection equipment, the detection camera is set to the just above the product placement platform, at least two area light sources are provided around the detection camera, the light exit surface of the area light source is parallel to the product placement platform.The product placement platform of appearance defect detection equipment provided by the utility model is transparent, can be illuminated by surrounding strip light source, so that the boundary between product and product placement platform is more clear;Area light source is set above product placement platform can evenly illuminate product;Strip light source around product placement platform has light supplement effect;It is favorable to improve the accuracy of appearance defect detection of automobile glass edge-wrapped product.

Description

Technical Field

[0001] This utility model relates to the field of glass inspection technology, and in particular to a device for detecting appearance defects. Background Technology

[0002] With the continuous advancement of machine vision technology, many product inspection tasks are now primarily performed by machine vision inspection systems. Machine inspection is more efficient than manual inspection and saves manpower. A typical machine vision inspection system includes a light source, camera, image processing unit, and monitor. The camera captures images, the image processing unit extracts image features for comparison, and the system determines whether the product is defective based on the comparison results. The results are then displayed on the monitor.

[0003] Machine vision inspection systems consist of inspection equipment and inspection algorithms. The basic architecture of these equipment and algorithms is general. Based on this general architecture, system designers further refine the specific details of the equipment and algorithms to improve system reliability. Automotive glass edging products may have appearance defects such as missing nails, missing sealing strips, missing sample labels, and missing bright trim strips. Currently, there is no suitable inspection equipment available in the industry for these defects. Utility Model Content

[0004] The technical problem to be solved by this utility model is: how to design specific details so that the testing equipment is more suitable for the appearance defect detection of automotive glass edging products.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A visual defect detection device includes a strip light source, a surface light source, a detection camera, and a transparent product placement stage. Multiple strip light sources are arranged around the product placement stage. The detection camera is positioned directly above the product placement stage along the height direction of the visual defect detection device. At least two surface light sources are arranged around the detection camera, and the light-emitting surfaces of the surface light sources are parallel to the product placement stage.

[0006] In some embodiments, the appearance defect detection device includes a central support, a surface light support, and a camera support. The central support includes a horizontal tube arranged along the width direction of the appearance defect detection device. The surface light support and the camera support are fixed on the horizontal tube. The surface light source is fixed on the surface light support, and the detection camera is mounted on the camera support.

[0007] In some embodiments, four surface light sources are arranged around the detection camera, and the surface light support is a square frame, with the four surface light sources respectively fixed at the four corners of the surface light support.

[0008] In some embodiments, along the height direction of the appearance defect detection device, the projections of the four surface light sources on the product placement platform cover the four corners of the product placement platform.

[0009] In some embodiments, the appearance defect detection device includes an operating table, a product placement platform is disposed on the upper side of the operating table, and a central support includes a vertical tube fixed on the operating table, the vertical tube being arranged along the height direction of the appearance defect detection device; a positioning frame is provided on the upper side of the operating table, along the height direction of the appearance defect detection device, the projection of the positioning frame on the product placement platform is located at the end of the product placement platform away from the vertical tube, and the positioning frame is used for the product to be inspected to be against and aligned.

[0010] In some embodiments, the upper side of the operating table is provided with a plurality of light strip supports, which are respectively located on the side of the product placement platform near the vertical tube and on both sides along the length direction of the appearance defect detection device. The light strip light source is mounted on the light strip support. The appearance defect detection device includes a first locking member, and the light strip light source is fixedly connected to the light strip support through the first locking member. After the first locking member is unlocked, the light strip light source can rotate relative to the light strip support. The rotation axis of the light strip light source is along the width direction or the length direction of the appearance defect detection device.

[0011] In some embodiments, the light bar bracket includes a second locking member, an upper bracket, and a lower bracket. The light bar is mounted on the upper bracket, and the lower bracket is mounted on the operating table. The upper bracket is fixedly connected to the lower bracket through the second locking member. After the second locking member is unlocked, the upper bracket can move up and down relative to the lower bracket.

[0012] In some embodiments, the appearance defect detection device includes a third locking member and a slider. The detection camera is mounted on the slider, and the slider is fixedly connected to the camera bracket via the third locking member. After the third locking member is unlocked, the slider can move up and down relative to the camera bracket.

[0013] In some embodiments, the appearance defect detection device includes a fourth locking member and a turntable. The detection camera is mounted on the turntable, and the turntable is fixedly connected to the slider through the fourth locking member. After the fourth locking member is unlocked, the turntable can rotate relative to the slider, and the rotation axis of the turntable is along the width direction of the appearance defect detection device.

[0014] In some embodiments, the appearance defect detection device includes a fifth locking member and a fixed ring. The detection camera is mounted on the fixed ring, and the fixed ring is fixedly connected to the turntable through the fifth locking member. After the fifth locking member is unlocked, the fixed ring can rotate relative to the turntable, and the rotation axis of the fixed ring is along the length direction of the appearance defect detection device.

[0015] The beneficial effects of this utility model are as follows: First, the product placement platform of the appearance defect detection equipment provided by this utility model is transparent and can be illuminated by the surrounding strip light source, making the boundary between the product and the product placement platform clearer. Second, the surface light source set above the product placement platform can evenly illuminate the product. Third, the strip light source around the product placement platform has a supplementary lighting effect. The above three design features help improve the accuracy of appearance defect detection for automotive glass edging products. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the appearance defect detection device according to an embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a portion of region A; Figure 3 for Figure 1 A magnified view of a portion of region B; Figure 4 This is a side view of the appearance defect detection device in this embodiment; Figure 5 This is a top view of the appearance defect detection equipment in this embodiment; Figure 6 This is a front view of the appearance defect detection device in this embodiment.

[0017] Label Explanation: X: Length direction of the appearance defect detection equipment; Y: Width direction of the appearance defect detection equipment; Z: Height direction of the appearance defect detection equipment; 1. Product placement table; 2. Strip light source; 3. Surface light source; 4. Inspection camera; 5. Central support; 6. Surface light support; 7. Camera support; 8. Operating table; 9. Monitor; 41. Slider; 42. Turntable; 43. Fixing ring; 51. Horizontal tube; 52. Vertical tube; 81. Positioning frame; 82. Strip light bracket; 83. Storage space; 821. Upper support; 822. Lower support. Detailed Implementation

[0018] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] A machine vision inspection system includes inspection equipment and inspection algorithms. The inspection equipment includes a light source, a worktable, an inspection camera, and an image processing unit. The product is placed on the worktable, illuminated by the light source, and the inspection camera captures an image of the product. The inspection algorithm then analyzes the image. To improve the accuracy of product defect detection, the light source needs to be rationally selected and arranged during the design of the inspection equipment to improve the quality of the product images captured by the inspection camera. This invention aims to improve the quality of product images captured by the inspection camera and designs the specific structure of the inspection equipment, without involving the inspection algorithm. The appearance defect inspection equipment provided by this invention can be used to inspect automotive glass edging products for appearance defects, and can also be used to inspect other products for appearance defects.

[0020] Please refer to Figures 1 to 3 This utility model provides a visual defect detection device, which includes a strip light source 2, a surface light source 3, a detection camera 4, and a transparent product placement platform 1. Multiple strip light sources 2 are arranged around the product placement platform 1. Along the height direction Z of the visual defect detection device, the detection camera 4 is positioned directly above the product placement platform 1. At least two surface light sources 3 are arranged around the detection camera 4, with the light-emitting surface of the surface light sources 3 parallel to the product placement platform 1.

[0021] As can be seen from the above description, the beneficial effects of this utility model are as follows: The surface light source 3 is positioned around the detection camera 4, ensuring that the detection camera 4 and the group of surface light sources 3 (comprising at least two surface light sources 3) are directly above the product placement platform 1. The detection camera 4's position directly above the product placement platform 1 ensures that the product placed on the platform is centered in the image. The group of surface light sources 3, positioned directly above the product placement platform 1, provides uniform illumination to the product, preventing shadows. The product placement platform 1 is transparent and can be illuminated by the surrounding strip light sources 2, making the boundary between the product and the platform clearer. The strip light sources 2 surrounding the product placement platform 1 also provide supplementary lighting.

[0022] In some embodiments, please refer to Figure 4 The appearance defect detection device includes a central support 5, a surface light support 6, and a camera support 7. The central support 5 includes a horizontal tube 51 arranged along the width direction Y of the appearance defect detection device. The surface light support 6 and the camera support 7 are fixed on the horizontal tube 51. The surface light source 3 is fixed on the surface light support 6, and the detection camera 4 is mounted on the camera support 7.

[0023] As can be seen from the above description, mounting the surface light source 3 and the detection camera 4 on the same central bracket 5 results in a simple and compact structure.

[0024] In some embodiments, please refer to Figure 5Four surface light sources 3 are arranged around the detection camera 4. The surface light support 6 is a square frame, and the four surface light sources 3 are fixed at the four corners of the surface light support 6 respectively.

[0025] As can be seen from the above description, compared to setting two larger surface light sources 3, with the two surface light sources 3 located on both sides of the inspection camera 4 along the length direction X of the appearance defect detection device, setting four surface light sources 3 can make the surface light sources 3 smaller and the cost lower.

[0026] In some embodiments, please refer to Figure 4 and Figure 5 Along the height direction Z of the appearance defect detection equipment, the projections of the four surface light sources 3 onto the product placement platform 1 cover the four corners of the product placement platform 1.

[0027] As can be seen from the above description, the four surface light sources 3 completely cover the product placement platform 1, which can ensure that the product is fully illuminated.

[0028] In some embodiments, please refer to Figure 1 , Figure 3 and Figure 4 The appearance defect detection equipment includes an operating table 8, a product placement platform 1 located on the upper side of the operating table 8, and a central support 5 including a vertical tube 52 fixed on the operating table 8. The vertical tube 52 is set along the height direction Z of the appearance defect detection equipment. A positioning frame 81 is provided on the upper side of the operating table 8. Along the height direction Z of the appearance defect detection equipment, the projection of the positioning frame 81 on the product placement platform 1 is located at the end of the product placement platform 1 away from the vertical tube 52. The positioning frame 81 is used for the product to be inspected to be against and aligned.

[0029] As can be seen from the above description, the projection of the positioning frame 81 on the product placement table 1 is located at the end of the product placement table 1 away from the vertical tube 52, so that the operator can place the product on the product placement table 1 and abut against the positioning frame 81 from the side of the operating table 8 away from the vertical tube 52 without being obstructed by the vertical tube 52.

[0030] In some embodiments, please refer to Figure 1 and Figure 3 The upper side of the operating table 8 is provided with multiple light stripe supports 82. These supports 82 are located on the side of the product placement table 1 near the vertical tube 52 and on both sides along the length direction X of the appearance defect detection equipment. The light stripe light source 2 is mounted on the light stripe supports 82. The appearance defect detection equipment includes a first locking member. The light stripe light source 2 is fixedly connected to the light stripe supports 82 via the first locking member. After the first locking member is unlocked, the light stripe light source 2 can rotate relative to the light stripe supports 82. The rotation axis of the light stripe light source 2 is along the width direction Y or the length direction X of the appearance defect detection equipment.

[0031] As can be seen from the above description, the pitch angle of the strip light source 2 is adjustable.

[0032] In some embodiments, please refer to Figure 1 and Figure 3 The light bar bracket 82 includes a second locking member, an upper bracket 821 and a lower bracket 822. The light bar 2 is mounted on the upper bracket 821 and the lower bracket 822 is mounted on the operating table 8. The upper bracket 821 is fixedly connected to the lower bracket 822 through the second locking member. After the second locking member is unlocked, the upper bracket 821 can move up and down relative to the lower bracket 822.

[0033] As can be seen from the above description, the height of the light source 2 can be adjusted along the height direction Z of the appearance defect detection equipment.

[0034] In some embodiments, please refer to Figure 1 and Figure 2 The appearance defect detection device includes a third locking member and a slider 41. The detection camera 4 is mounted on the slider 41. The slider 41 is fixedly connected to the camera bracket 7 through the third locking member. After the third locking member is unlocked, the slider 41 can move up and down relative to the camera bracket 7.

[0035] As can be seen from the above description, the height of the detection camera 4 can be adjusted along the height direction Z of the appearance defect detection device.

[0036] In some embodiments, please refer to Figure 1 and Figure 2 The appearance defect detection device includes a fourth locking member and a turntable 42. The detection camera 4 is mounted on the turntable 42. The turntable 42 is fixedly connected to the slider 41 through the fourth locking member. After the fourth locking member is unlocked, the turntable 42 can rotate relative to the slider 41. The rotation axis of the turntable 42 is along the width direction Y of the appearance defect detection device.

[0037] As can be seen from the above description, the inspection camera 4 can be rotated back and forth along the length direction X of the appearance defect inspection device to adjust the angle.

[0038] In some embodiments, please refer to Figure 1 and Figure 2 The appearance defect detection device includes a fifth locking member and a fixed ring 43. The detection camera 4 is mounted on the fixed ring 43. The fixed ring 43 is fixedly connected to the turntable 42 through the fifth locking member. After the fifth locking member is unlocked, the fixed ring 43 can rotate relative to the turntable 42. The rotation axis of the fixed ring 43 is along the length direction X of the appearance defect detection device.

[0039] As can be seen from the above description, the inspection camera 4 can be rotated back and forth along the width direction Y of the appearance defect inspection device to adjust the angle.

[0040] Please refer to Figures 1 to 6 One embodiment of this utility model is as follows: A device for detecting appearance defects, please refer to Figures 1 to 3 The appearance defect detection equipment includes an operating table 8, a central support 5, a surface light support 6, a camera support 7, a strip light source 2, a surface light source 3, an inspection camera 4, a monitor 9, and a transparent product placement platform 1. The product placement platform 1 is located on top of the operating table 8. The operating table 8 has a storage space 83, where peripherals such as printers can be placed for convenient printing of MES (Manufacturing Execution System) labels. Please refer to... Figure 4 The central support 5 includes a horizontal tube 51 arranged along the width direction Y of the appearance defect detection equipment and a vertical tube 52 arranged along the height direction Z of the appearance defect detection equipment. The vertical tube 52 is fixed on the operating table 8. Please refer to... Figure 4 and Figure 6 The surface light bracket 6 and camera bracket 7 are fixed on the horizontal tube 51, the surface light source 3 is fixed on the surface light bracket 6, the inspection camera 4 is mounted on the camera bracket 7, and the monitor 9 is fixed on the vertical tube 52. A positioning frame 81 is provided on the upper side of the operating table 8. Along the height direction Z of the appearance defect inspection equipment, the projection of the positioning frame 81 on the product placement table 1 is located at the end of the product placement table 1 away from the vertical tube 52. The positioning frame 81 is used for the product to be inspected to rest against and be aligned.

[0041] Please refer to Figures 1 to 3 Four strip light sources 2 are arranged around the product placement platform 1. Four corresponding strip light supports 82 are provided on the upper side of the operating platform 8. The strip light sources 2 are mounted on the strip light supports 82. The four strip light supports 82 are located on the side of the product placement platform 1 closest to the vertical tube 52 and on both sides along the length direction X of the appearance defect detection equipment. The strip light sources 2 are fixedly connected to the strip light supports 82 by a first locking member. After the first locking member is unlocked, the strip light sources 2 can rotate relative to the strip light supports 82. The rotation axis of the strip light sources 2 is along the width direction Y or the length direction X of the appearance defect detection equipment. The strip light support 82 includes a second locking member, an upper support 821, and a lower support 822. The strip light sources 2 are mounted on the upper support 821. The upper support 821 is fixedly connected to the lower support 822 by the second locking member. After the second locking member is unlocked, the upper support 821 can move up and down relative to the lower support 822. The lower bracket 822 is mounted on the operating table 8. The operating table 8 has multiple mounting positions corresponding to the lower bracket 822, so that the distance between the lower bracket 822 and the product placement table 1 can be adjusted along the width direction Y or length direction X of the appearance defect detection equipment.

[0042] Please refer to Figures 1 to 3The inspection camera 4 is mounted on a fixed ring 43, which is fixedly connected to the turntable 42 via a fifth locking member. After the fifth locking member is unlocked, the fixed ring 43 can rotate relative to the turntable 42, with its rotation axis along the length direction X of the appearance defect inspection device. The turntable 42 is fixedly connected to the slider 41 via a fourth locking member. After the fourth locking member is unlocked, the turntable 42 can rotate relative to the slider 41, with its rotation axis along the width direction Y of the appearance defect inspection device. The slider 41 is fixedly connected to the camera bracket 7 via a third locking member. After the third locking member is unlocked, the slider 41 can move up and down relative to the camera bracket 7. Please refer to... Figure 4 and Figure 6 Along the height direction Z of the appearance defect detection equipment, the detection camera 4 is positioned directly above the product placement platform 1.

[0043] Please refer to Figures 4 to 6 Four surface light sources 3 are arranged around the inspection camera 4. The surface light support 6 is a square frame, and the four surface light sources 3 are fixed at the four corners of the surface light support 6. The light-emitting surface of the surface light source 3 is parallel to the product placement table 1. Along the height direction Z of the appearance defect inspection equipment, the projection of the four surface light sources 3 on the product placement table 1 covers the four corners of the product placement table 1.

[0044] In summary, the appearance defect detection device provided by this utility model includes an operating table 8, a central support 5, a surface light support 6, a camera support 7, a strip light source 2, a surface light source 3, a detection camera 4, a monitor 9, and a transparent product placement platform 1. The surface light sources 3 are arranged around the detection camera 4, ensuring that the detection camera 4 and the surface light source group consisting of at least two surface light sources 3 are directly above the product placement platform 1. The detection camera 4's position directly above the product placement platform 1 ensures that the product placed on the platform is centered in the image. The group of surface light sources 3, positioned directly above the product placement platform 1, ensures that the product is evenly illuminated, avoiding shadows. The transparent product placement platform 1 is illuminated by the surrounding strip light sources 2, making the boundary between the product and the platform clearer. The appearance defect detection device provided by this utility model can be used to detect appearance defects in automotive glass edging products, and can also be used to detect appearance defects in other products.

[0045] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A device for detecting appearance defects, characterized in that: The device includes a strip light source (2), a surface light source (3), an inspection camera (4), and a transparent product placement platform (1). Multiple strip light sources (2) are arranged around the product placement platform (1). Along the height direction (Z) of the appearance defect inspection device, the inspection camera (4) is located directly above the product placement platform (1). At least two surface light sources (3) are arranged around the inspection camera (4). The light-emitting surface of the surface light source (3) is parallel to the product placement platform (1).

2. The appearance defect detection device as described in claim 1, characterized in that: The device includes a central support (5), a surface light support (6), and a camera support (7). The central support (5) includes a horizontal tube (51) arranged along the width direction (Y) of the appearance defect detection device. The surface light support (6) and the camera support (7) are fixed on the horizontal tube (51). The surface light source (3) is fixed on the surface light support (6). The detection camera (4) is mounted on the camera support (7).

3. The appearance defect detection device as described in claim 2, characterized in that: Four surface light sources (3) are arranged around the detection camera (4). The surface light support (6) is a square frame, and the four surface light sources (3) are respectively fixed at the four corners of the surface light support (6).

4. The appearance defect detection device as described in claim 3, characterized in that: Along the height direction (Z) of the appearance defect detection device, the projections of the four surface light sources (3) on the product placement platform (1) cover the four corners of the product placement platform (1).

5. The appearance defect detection device as described in claim 2, characterized in that: The device includes an operating table (8), a product placement table (1) located on the upper side of the operating table (8), and a central support (5) including a vertical tube (52) fixed on the operating table (8), the vertical tube (52) being arranged along the height direction (Z) of the appearance defect detection device. The upper side of the operating table (8) is provided with a positioning frame (81). Along the height direction (Z) of the appearance defect detection equipment, the projection of the positioning frame (81) on the product placement table (1) is located at the end of the product placement table (1) away from the vertical tube (52). The positioning frame (81) is used for the product to be inspected to be against and aligned.

6. The appearance defect detection device as described in claim 5, characterized in that: The upper side of the operating table (8) is provided with multiple light strip brackets (82). The multiple light strip brackets (82) are respectively located on the side of the product placement table (1) near the vertical tube (52) and on both sides along the length direction (X) of the appearance defect detection equipment. The light strip (2) is installed on the light strip bracket (82). Includes a first locking member, the strip light source (2) is fixedly connected to the strip light bracket (82) through the first locking member. After the first locking member is unlocked, the strip light source (2) can rotate relative to the strip light bracket (82). The rotation axis of the strip light source (2) is along the width direction (Y) or length direction of the appearance defect detection equipment.

7. The appearance defect detection device as described in claim 6, characterized in that: The light bar bracket (82) includes a second locking member, an upper bracket (821) and a lower bracket (822). The light bar (2) is mounted on the upper bracket (821) and the lower bracket (822) is mounted on the operating table (8). The upper bracket (821) is fixedly connected to the lower bracket (822) through the second locking member. After the second locking member is unlocked, the upper bracket (821) can move up and down relative to the lower bracket (822).

8. The appearance defect detection device as described in claim 2, characterized in that: Includes a third locking member and a slider (41). The detection camera (4) is mounted on the slider (41). The slider (41) is fixedly connected to the camera bracket (7) through the third locking member. After the third locking member is unlocked, the slider (41) can move up and down relative to the camera bracket (7).

9. The appearance defect detection device as described in claim 8, characterized in that: Includes a fourth locking member and a turntable (42). The inspection camera (4) is mounted on the turntable (42). The turntable (42) is fixedly connected to the slider (41) through the fourth locking member. After the fourth locking member is unlocked, the turntable (42) can rotate relative to the slider (41). The rotation axis of the turntable (42) is along the width direction (Y) of the appearance defect inspection equipment.

10. The appearance defect detection device as described in claim 9, characterized in that: Includes a fifth locking member and a fixing ring (43). The detection camera (4) is mounted on the fixing ring (43). The fixing ring (43) is fixedly connected to the turntable (42) through the fifth locking member. After the fifth locking member is unlocked, the fixing ring (43) can rotate relative to the turntable (42). The rotation axis of the fixing ring (43) is along the length direction (X) of the appearance defect detection equipment.

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