Micro-flaw inspection device for high-light-reflection and high-light-transmission products

Abstract

The utility model relates to the technical field of micro-flaw inspection, in particular to a micro-flaw inspection device for high-light-reflection and high-light-transmission products, which comprises a shell, a camera component, an anti-shadow component, a lifting component, a sliding component, an annular light source, a fixed frame, a sliding table II, a coaxial light source, a light shield, a square plane light source, a sliding table III, a sliding table IV and a photoelectric sensor, a first top surface detection structure, a second top surface detection structure and a side surface detection structure are installed in the shell, the top surface detection structure I and the top surface detection structure II are arranged, different schemes are matched with a surfaces with different curvatures, the universality and compatibility are improved, the influence of light spots and shadows on detection is effectively avoided through the shadow prevention assembly, and the detection accuracy is improved. The side face detection structure is arranged, large-range adjustable photographing can be achieved, products with different sizes can be photographed completely and clearly, and software detection is not affected by light spots and shadows.

Description

Technical Field

[0001] This utility model belongs to the field of micro-defect inspection technology, specifically relating to a micro-defect inspection device for highly reflective and highly transparent products. Background Technology

[0002] In industrial applications, high-gloss materials are frequently used to process workpieces requiring high flatness and surface finish. Machine vision technology, through high-precision cameras and image processing algorithms, can detect minute imperfections on the surfaces of highly reflective and translucent products. This method can significantly improve the accuracy and efficiency of inspection, and is particularly suitable for products with smooth, highly reflective surfaces.

[0003] However, high-reflectivity products can produce light spots and reflections during shooting due to large differences in brightness and interference from reflections. Furthermore, the products vary in size and shape, making it difficult for the camera to focus and capture the entire product, which can easily create blind spots. In addition, the types of defects or flaws are different, and existing solutions cannot capture the entire product or have low accuracy (the defects are too small and there are too many types). External light sources can also pollute the lighting source, leading to unstable shooting results. Therefore, there is an urgent need for a micro-defect inspection device for high-reflectivity and high-transmittance products to solve the above problems. Utility Model Content

[0004] In order to overcome the above-mentioned technical problems, the purpose of this utility model is to provide a micro-defect inspection device for highly reflective and highly transparent products, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a micro-defect inspection device for highly reflective and highly transparent products, comprising a housing, a camera assembly, an anti-shadow assembly, a lifting assembly, a sliding assembly, a ring light source, a fixed frame, a second sliding table, a coaxial light source, a light shield, a square planar light source, a third sliding table, a fourth sliding table, and a photoelectric sensor. The housing contains a top surface detection structure, a second top surface detection structure, and a side surface detection structure. The camera assembly includes a first sliding table, the slider of which is fixed to the fixed base of a universal table. The movable axis of the universal table is fixedly connected to a camera. The anti-shadow assembly includes a light shield, the light shield... A circular hoop frame is fixedly connected to the top, and a fixing screw is threaded to the right end of the circular hoop frame. The lifting assembly includes a base and a fixing plate. Both the base and the fixing plate are rotatably connected to threaded rods, and both the base and the fixing plate are fixedly connected to fixing rods. The threaded rods are threadedly connected to a slider, and the slider is slidably connected to the fixing rods. The sliding assembly includes a slide rail, and a rack and a half-rack are fixedly connected to the inner wall of the slide rail. Limiting plates are fixedly connected to the front sides of both the rack and the half-rack. Both the half-rack and the limiting plates are slidably connected to a sliding seat. The sliding seat is rotatably connected to a rotating shaft, and a gear is fixedly connected to the rear side of the rotating shaft. A knob is fixedly connected to the front side of the rotating shaft.

[0006] The first top surface detection structure comprises a camera assembly, an anti-shadow assembly, a ring light source, and a fixed frame. A fixed frame is fixedly connected to the front side of the slider of the camera assembly's slide table. The ring light source is fixedly connected to the bottom of the fixed frame, and the outer wall of the camera assembly's universal stage is fixedly connected to the front top of the fixed frame.

[0007] The second top-surface detection structure comprises a camera assembly, an anti-shadow assembly, a lifting assembly, a second sliding table, and a coaxial light source. The slider of the second sliding table is fixedly connected to the bottom of the base of the lifting assembly. The right side of the slider of the lifting assembly is fixedly connected to the coaxial light source. The camera of the camera assembly is positioned vertically in the direction of the coaxial light from the coaxial light source.

[0008] The side detection structure comprises a camera assembly, a lifting assembly, a sliding assembly, a light shield, a third sliding table, a fourth sliding table, and a photoelectric sensor. The camera assembly consists of three sets. The slider of the third sliding table is fixedly connected to the outer wall of the first sliding table of the camera assembly. The sliders at both ends of the fourth sliding table are fixedly connected to the outer wall of the first sliding table of the camera assembly. The middle slider of the fourth sliding table is fixedly connected to the base of the lifting assembly. The top of the slider of the lifting assembly is fixedly connected to the photoelectric sensor. The sliding seat of the sliding assembly is fixedly connected to the outer wall of the slide rail of the fourth sliding table.

[0009] Preferably, the housing is provided with a frame, and slide table one, slide table two, light shield, slide table three and slide rail are all fixedly connected to the frame.

[0010] Preferably, the light shield and the circular frame are slidably connected to the camera lens housing, and the inner walls of the light shield and the circular frame are fitted to the camera lens housing.

[0011] Preferably, the light shield is 471mm long, 310mm wide, and 410mm high, and a square planar light source is fixedly connected to the inner wall of the top of the light shield, and the square planar light source illuminates vertically downwards.

[0012] Preferably, a circular hole is provided in the middle of the front side of the light shield, and circular holes are provided at both ends of the rear side of the light shield, with the size of the circular holes corresponding to the size of the camera. A square hole is provided in the middle of the rear side of the light shield, with the size of the square hole corresponding to the size of the photoelectric sensor.

[0013] Preferably, the rack has a rack on the side near the middle, and the surface of the half rack has a rack on the side near the middle, and the width of the half rack is half that of the rack.

[0014] Preferably, the outer wall of the gear is provided with a gear ring, and the gear ring meshes with the rack and the rack of the half rack.

[0015] Preferably, the outer wall of the knob is provided with an uneven pattern.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This micro-defect inspection device for highly reflective and highly transparent products is equipped with a top surface inspection structure one and a top surface inspection structure two. For surface A, there are two schemes: ring light source illumination and coaxial light illumination. Different schemes are adapted to surfaces A with different curvatures, improving versatility and compatibility. The ring light source is used for circular planes, while the coaxial light illumination is used for curved surfaces A, such as sloping, saddle-shaped, concave annular, etc. The camera position can move freely along the x-axis and 200mm along the z-axis. The anti-shadow component avoids high reflectivity and the camera's reflection on surface A, effectively preventing the influence of light spots and shadows on the inspection.

[0018] 2. This micro-defect inspection device for highly reflective and highly transparent products features a side-mounted inspection structure. It allows free movement of the b-side along the x-axis, 150mm along the y-axis, and 300mm along the z-axis, with arbitrary angles. The camera position can be expressed in coordinates (scales are present on both the universal table and the sliding table), enabling a wide range of adjustable imaging. Products of varying sizes can be captured fully and clearly, without light spots or shadows affecting software inspection. Attached Figure Description

[0019] Figure 1 This is a front perspective view of the present utility model;

[0020] Figure 2 This is a side sectional view of the present invention;

[0021] Figure 3 This is a partially enlarged schematic diagram of part A of this utility model;

[0022] Figure 4 This is a schematic diagram of the exploded structure of Part A of this utility model;

[0023] Figure 5 This is a partially enlarged schematic diagram of part B of the present invention;

[0024] Figure 6 This is a schematic diagram of the exploded structure of Part B of this utility model;

[0025] Figure 7 This is a schematic diagram of the explosion-proof component structure of this utility model;

[0026] Figure 8 This is a partially enlarged schematic diagram of part C of this utility model;

[0027] Figure 9 This is a side sectional view of part C of the present invention;

[0028] Figure 10This is a schematic diagram of the exploded structure of part C of this utility model;

[0029] Figure 11 This is a cross-sectional view of the top of the sliding component of this utility model;

[0030] Figure 12 This is a schematic diagram of the exploded structure of the sliding component of this utility model.

[0031] In the diagram: 1. Housing; 2. Camera assembly; 21. Slide 1; 22. Universal table; 23. Camera; 3. Anti-shadow assembly; 31. Light shield; 32. Circular frame; 33. Fixing screw; 4. Lifting assembly; 41. Base; 42. Threaded rod; 43. Fixing rod; 44. Fixing plate; 45. Slider; 5. Sliding assembly; 51. Slide rail; 52. Rack; 53. Half rack; 54. Limiting plate; 55. Sliding seat; 56. Gear; 57. Rotating shaft; 58. Knob; 6. Ring light source; 7. Fixing frame; 8. Slide 2; 9. Coaxial light source; 10. Light shield; 11. Square planar light source; 12. Slide 3; 13. Slide 4; 14. Photoelectric sensor. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Please see Figure 1-12This utility model provides an embodiment of a micro-defect inspection device for highly reflective and highly transparent products, comprising a housing 1, a camera assembly 2, an anti-shadow assembly 3, a lifting assembly 4, a sliding assembly 5, a ring light source 6, a fixing frame 7, a second sliding table 8, a coaxial light source 9, a light shield 10, a square planar light source 11, a third sliding table 12, a fourth sliding table 13, and a photoelectric sensor 14. The housing 1 contains a top surface detection structure, a second top surface detection structure, and a side surface detection structure. The camera assembly 2 includes a first sliding table 21, the slider of which is fixed to the base of a universal table 22. The movable axis of the universal table 22 is fixedly connected to a camera 23. The anti-shadow assembly 3 includes a light shield 31, the top of which is fixedly connected to a circular hoop frame 3. 2. The right end of the circular hoop frame 32 is threadedly connected to a fixing screw 33. The lifting assembly 4 includes a base 41 and a fixing plate 44. Both the base 41 and the fixing plate 44 are rotatably connected to a threaded rod 42. Both the base 41 and the fixing plate 44 are fixedly connected to a fixing rod 43. The threaded rod 42 is threadedly connected to a slider 45. The slider 45 is slidably connected to the fixing rod 43. The sliding assembly 5 includes a slide rail 51. The inner wall of the slide rail 51 is fixedly connected to a rack 52 and a half rack 53. The front sides of the rack 52 and the half rack 53 are fixedly connected to a limiting plate 54. The half rack 53 and the limiting plate 54 are slidably connected to a sliding seat 55. The sliding seat 55 is rotatably connected to a rotating shaft 57. The rear side of the rotating shaft 57 is fixedly connected to a gear 56. The front side of the rotating shaft 57 is fixedly connected to a knob 58.

[0034] The top surface detection structure consists of a camera assembly 2, an anti-shadow assembly 3, a ring light source 6, and a mounting bracket 7. The mounting bracket 7 is fixedly connected to the front side of the slider of the slide table 21 of the camera assembly 2. The ring light source 6 is fixedly connected to the bottom of the mounting bracket 7. The outer wall of the universal table 22 of the camera assembly 2 is fixedly connected to the front top of the mounting bracket 7.

[0035] The second top surface detection structure consists of a camera assembly 2, an anti-shadow assembly 3, a lifting assembly 4, a second sliding table 8, and a coaxial light source 9. The slider of the second sliding table 8 is fixedly connected to the bottom of the base 41 of the lifting assembly 4. The right side of the slider 45 of the lifting assembly 4 is fixedly connected to the coaxial light source 9. The camera 23 of the camera assembly 2 is positioned in the vertical direction of the coaxial light from the coaxial light source 9.

[0036] The side detection structure consists of a camera assembly 2, a lifting assembly 4, a sliding assembly 5, a light shield 10, a third sliding table 12, a fourth sliding table 13, and a photoelectric sensor 14. The camera assembly 2 is provided with three sets. The slider of the third sliding table 12 is fixedly connected to the outer wall of the first sliding table 21 of the camera assembly 2. The sliders at both ends of the fourth sliding table 13 are fixedly connected to the outer wall of the first sliding table 21 of the camera assembly 2. The middle slider of the fourth sliding table 13 is fixedly connected to the base 41 of the lifting assembly 4. The top of the slider 45 of the lifting assembly 4 is fixedly connected to the photoelectric sensor 14. The sliding seat 55 of the sliding assembly 5 is fixedly connected to the outer wall of the slide rail of the fourth sliding table 13.

[0037] Furthermore, a frame is provided inside the outer casing 1, and slide table 21, slide table 8, light shield 10, slide table 3 12 and slide rail 51 are all fixedly connected to the frame. The frame of the outer casing 1 supports slide table 21, slide table 8, light shield 10, slide table 3 12 and slide rail 51, thereby fixing the top surface detection structure 1, top surface detection structure 2 and side surface detection structure to the frame.

[0038] Furthermore, both the light shield 31 and the circular frame 32 are slidably connected to the lens housing of the camera 23, and the inner walls of the light shield 31 and the circular frame 32 are fitted to the lens housing of the camera 23. An anti-reflection component 3 is added to the lens of the camera 23, and a light shield 31 covered with light-absorbing cloth, which is either aluminum or plastic, is installed on the circular frame 32. The anti-reflection component 3 avoids high reflection and the reflection of the camera 23 on surface a.

[0039] Furthermore, the light shield 10 is 471mm long, 310mm wide, and 410mm high. A square planar light source 11 is fixedly connected to the inner wall of the top of the light shield 10, and the square planar light source 11 shines vertically downwards. The large light shield 10 covers the cameras 23 of the three sets of imaging components 2 and the product, so that their surfaces are not affected by ambient light pollution. A 200*100mm area is cut off on both the left and right sides of the light shield 10 to avoid interference with the production line. A square planar light source 11 is fixed on the inner top of the light shield 10, which shines downwards on the product from directly above.

[0040] Furthermore, a circular hole is provided in the middle of the front side of the light shield 10, and circular holes are provided at both ends of the rear side of the light shield 10, with the size of the circular holes corresponding to the size of the camera 23. A square hole is provided in the middle of the rear side of the light shield 10, with the size of the square hole corresponding to the size of the photoelectric sensor 14. The camera 23 shoots upward at an angle of 20~30° with the horizontal to avoid light spots. The angles between the directions of the three cameras 23 and the center origin of the product are 120° apart, and the illumination range of the camera 23 is 140~180°, so a margin of about 20~60° is reserved to avoid the problem of blind spots not being captured completely. For triggering accuracy, the photoelectric sensor 14 is fixed on the slider 45 of the lifting assembly 4, so that the photoelectric sensor 14 can move freely within a certain range, which is convenient for debugging so that the program can capture suitable photos.

[0041] Furthermore, a rack is provided on the side of the rack 52 near the middle, and a rack is provided on the side of the surface of the half rack 53 near the middle. The width of the half rack 53 is half that of the rack 52. It can be pulled forward by 8mm so that the right side of the gear 56 no longer engages with the half rack 53 while the left side still engages with the rack 52.

[0042] Furthermore, the outer wall of gear 56 is provided with a gear ring, and the gear ring of gear 56 meshes with the rack 52 and the half rack 53. Pressing the knob 58 causes the knob 58 to drive gear 56 to move backward, and both the left and right sides of gear 56 mesh with rack 52 and half rack 53, thus fixing the position of sliding seat 55.

[0043] Furthermore, the outer wall of the knob 58 is provided with an uneven pattern. Rotating the knob 58 adjusts the up and down position of the sliding seat 55. The uneven surface can increase the contact area between the knob 58 and the palm, improving the stability when holding it.

[0044] Working principle:

[0045] When using a highly reflective product, we refer to its top surface as surface A, its side surface as surface B, and its bottom surface as surface C. Generally, surface C is not required for photography or identification. Take a cylindrical highly reflective product with a radius of 15mm and a height of 15mm as an example.

[0046] The product is illuminated by a ring light source 6 at an angle of about 45° downwards. The position and angle of the camera 23 are slightly adjusted to be about 10° downwards and vertically. An anti-reflection component 3 is added to the lens of the camera 23. A light shield 31, which is made of aluminum or plastic and covered with light-absorbing cloth, is installed on the circular frame 32. The anti-reflection component 3 avoids high reflection and the reflection of the camera 23 on surface a.

[0047] Coaxial light illumination is used for surfaces with curved surfaces, such as sloping, saddle-shaped, concave ring-shaped, etc., to photograph the defects. The coaxial light source 9 is fixed on the slider 45 of the lifting assembly 4, which is adjusted up and down. The base 41 of the lifting assembly 4 is fixed on the slider of the slide table 8, realizing the xyz three-axis movement of the coaxial light. The camera 23 is placed in the vertical direction of the coaxial light.

[0048] When shooting side B, a 45° top light is used. A large light shield 10 covers the cameras 23 of the three camera components 2 and the product, preventing ambient light pollution. A 200*100mm area is cut off from both sides of the light shield 10 to avoid interference with the production line. A square planar light source 11 is fixed on the inner top of the light shield 10, illuminating the product directly above it. The cameras 23 shoot upwards at an angle of 20-30° to the horizontal to avoid glare. The angles between the three cameras 23 and the product's center point differ from each other. The illumination range of camera 23 is 140~180°, so a margin of about 20~60° is reserved to avoid the problem of blind spots not being captured completely. For triggering accuracy, photoelectric sensor 14 is fixed on slider 45 of lifting component 4, so that photoelectric sensor 14 can move freely within a certain range, which is convenient for debugging so that the program can capture suitable photos. The sensors are all SICK GTE6 series diffuse reflection photoelectric switches, which can move freely on the x-axis and 150mm on the z-axis to adapt to products of different heights and facilitate debugging.

[0049] When installing the side inspection structure, a rack and pinion slide was designed, which has a linear adjustment position of the gear and rack and a reliable fixing structure. Pressing the knob 58 causes the knob 58 to drive the gear 56 to move backward. The left and right sides of the gear 56 engage the rack 52 and the half rack 53, which fixes the position of the sliding seat 55. The vertical load-bearing capacity (approximately 15kg load-bearing capacity of the 3-die alloy) is maintained by the rack 52, the half rack 53 and the gear 56. Pulling it forward 8mm will cause the right side of the gear 56 to no longer engage the half rack 53 while the left side still engages the rack 52. Then, the knob 58 can be rotated to adjust the up and down position of the sliding seat 55. The tooth pitch of 9.42mm has high precision.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A device for inspecting micro-defects in highly reflective and highly transparent products, characterized in that: The system includes a housing (1), a camera assembly (2), an anti-shadow assembly (3), a lifting assembly (4), a sliding assembly (5), a ring light source (6), a mounting bracket (7), a second sliding table (8), a coaxial light source (9), a light shield (10), a square planar light source (11), a third sliding table (12), a fourth sliding table (13), and a photoelectric sensor (14). The housing (1) is equipped with a top surface detection structure, a second top surface detection structure, and a side surface detection structure. The camera assembly (2) includes a first sliding table (21), the slider of which is fixed to the mounting base of a universal table (22). The movable axis of the universal table (22) is fixedly connected to a camera (23). The anti-shadow assembly (3) includes a light shield (31), the top of which is fixedly connected to a circular hoop frame (32). The right end of the circular hoop frame (32) is threadedly connected to a fixing screw (33). The lifting assembly... The component (4) includes a base (41) and a fixing plate (44). The base (41) and the fixing plate (44) are rotatably connected to a threaded rod (42). The base (41) and the fixing plate (44) are fixedly connected to a fixing rod (43). The threaded rod (42) is threadedly connected to a slider (45). The slider (45) is slidably connected to the fixing rod (43). The sliding assembly (5) includes a slide rail (51). The inner wall of the slide rail (51) is fixedly connected to a rack (52) and a half rack (53). The front side of the rack (52) and the half rack (53) are fixedly connected to a limiting plate (54). The half rack (53) and the limiting plate (54) are slidably connected to a sliding seat (55). The sliding seat (55) is rotatably connected to a rotating shaft (57). The rear side of the rotating shaft (57) is fixedly connected to a gear (56). The front side of the rotating shaft (57) is fixedly connected to a knob (58). The top surface detection structure consists of a camera assembly (2), an anti-shadow assembly (3), a ring light source (6), and a mounting bracket (7). The mounting bracket (7) is fixedly connected to the front side of the slider of the slide table (21) of the camera assembly (2). The ring light source (6) is fixedly connected to the bottom of the mounting bracket (7). The outer wall of the universal table (22) of the camera assembly (2) is fixedly connected to the front side of the top of the mounting bracket (7). The second top surface detection structure consists of a camera assembly (2), an anti-shadow assembly (3), a lifting assembly (4), a sliding table (8), and a coaxial light source (9). The slider of the sliding table (8) is fixedly connected to the bottom of the base (41) of the lifting assembly (4). The right side of the slider (45) of the lifting assembly (4) is fixedly connected to the coaxial light source (9). The camera (23) of the camera assembly (2) is positioned in the vertical direction of the coaxial light of the coaxial light source (9). The side detection structure consists of a camera assembly (2), a lifting assembly (4), a sliding assembly (5), a light shield (10), a sliding table three (12), a sliding table four (13), and a photoelectric sensor (14). The camera assembly (2) is provided with three sets. The slider of the sliding table three (12) is fixedly connected to the outer wall of the sliding table one (21) of the camera assembly (2). The sliders at both ends of the sliding table four (13) are fixedly connected to the outer wall of the sliding table one (21) of the camera assembly (2). The middle slider of the sliding table four (13) is fixedly connected to the base (41) of the lifting assembly (4). The top of the slider (45) of the lifting assembly (4) is fixedly connected to the photoelectric sensor (14). The sliding seat (55) of the sliding assembly (5) is fixedly connected to the outer wall of the slide rail of the sliding table four (13).

2. The micro-defect inspection device for high-reflectivity and high-transmittance products according to claim 1, characterized in that: The outer shell (1) is provided with a frame, and the slide table one (21), slide table two (8), light shield (10), slide table three (12) and slide rail (51) are all fixedly connected to the frame.

3. The micro-defect inspection device for high-reflectivity and high-transmittance products according to claim 1, characterized in that: The light shield (31) and the circular frame (32) are slidably connected to the lens housing of the camera (23), and the inner walls of the light shield (31) and the circular frame (32) are fitted to the lens housing of the camera (23).

4. The micro-defect inspection device for high-reflectivity and high-transmittance products according to claim 1, characterized in that: The light shield (10) is 471mm long, 310mm wide, and 410mm high. A square planar light source (11) is fixedly connected to the inner wall of the top of the light shield (10), and the square planar light source (11) shines vertically downward.

5. The micro-defect inspection device for high-reflectivity and high-transmittance products according to claim 1, characterized in that: The light shield (10) has a round hole in the middle of the front side, and round holes are opened at both ends of the rear side of the light shield (10), with the size of the round holes corresponding to the camera (23). The light shield (10) has a square hole in the middle of the rear side, with the size of the square hole corresponding to the photoelectric sensor (14).

6. The micro-defect inspection device for high-reflectivity and high-transmittance products according to claim 1, characterized in that: The rack (52) has a rack on the side near the middle, and the surface of the half rack (53) has a rack on the side near the middle, and the width of the rack of the half rack (53) is half that of the rack (52).

7. The micro-defect inspection device for high-reflectivity and high-transmittance products according to claim 1, characterized in that: The outer wall of the gear (56) is provided with a toothed ring, and the toothed ring of the gear (56) meshes with the rack (52) and the rack (53).

8. The micro-defect inspection device for high-reflectivity and high-transmittance products according to claim 1, characterized in that: The outer wall of the knob (58) is provided with an uneven pattern.

Images