Filter lens surface flaw detection device based on visual detection

Abstract

The invention relates to the technical field of detection devices, and discloses a filter lens surface flaw detection device based on visual inspection, the filter lens surface flaw detection device comprises a detection equipment main body, an adjusting support, two light sources, two detection mechanisms and a driving mechanism are mounted in the detection equipment main body, the top of the driving mechanism is fixedly connected with a connecting column, and the top of the connecting column is provided with a turntable; the turntable is fixedly connected with the connecting column through bolts, a plurality of fixed frames distributed at equal intervals are rotationally connected to the turntable, a movable frame is slidably connected to the side, away from the center position of the turntable, of each fixed frame, two supporting plates are arranged at the bottom of the turntable, supporting plates are fixedly connected to the bottoms of the supporting plates, and the bottoms of the supporting plates are fixedly connected with the detection equipment body. According to the optical filter lens surface flaw detection device based on visual detection, the supporting plate is arranged at the bottom of the rotating disc, and the light source is used for obliquely lighting, so that the reflected image, received by the detection mechanism, of the optical filter lens is not easily mixed with other images, and the detection equipment main body can detect a transparent object.

Description

Technical Field

[0001] This invention relates to the field of detection device technology, specifically to a visual inspection-based device for detecting surface defects in optical filters. Background Technology

[0002] The core function of optical filters lies in precisely controlling the wavelength, intensity, and polarization direction of light. If their surface has scratches, spots, bubbles, or other defects, it will disrupt the light propagation path, leading to reduced transmittance, increased light scattering, or wavelength selective shift, thus directly affecting filtering efficiency. Therefore, surface defect detection of optical filters is crucial. Currently, visual inspection devices are commonly used tools. They use cameras to photograph objects and transmit the information in real time to a control device for analysis to determine whether surface defects exist.

[0003] As per existing technology, patent CN211347992U discloses a visual inspection device, including a transparent turntable, a driving mechanism, a first inspection mechanism, a second inspection mechanism, a third inspection mechanism, and a control mechanism. The transparent turntable is connected to the output end of the driving mechanism. The first and second inspection mechanisms are mounted on the same support, with the inspection ports of the first and second inspection mechanisms facing each other and corresponding to the transparent turntable. The third inspection mechanism includes a 3D structured light source and a detection camera, both corresponding to the transparent turntable. The driving mechanism, the first and second inspection mechanisms, the 3D structured light source, and the detection camera are all electrically connected to the control mechanism. This inspection device automates the inspection of flat, small objects, improving inspection accuracy and efficiency.

[0004] The above-mentioned detection device still has certain defects: The aforementioned inspection device operates by simply placing the object to be inspected on the transparent turntable to initiate the photographic inspection process. However, this device is better suited for inspecting surface defects on opaque objects, such as bolts and buttons. When inspecting transparent objects, such as transparent filters, the image of the object itself is easily confused with the transparent background, making it difficult to accurately identify the outline of surface defects. This limits the device's ability to detect surface defects on transparent objects, thus limiting its application in specific scenarios. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a visual inspection-based device for detecting surface defects in optical filters, enabling the main body of the inspection equipment to detect transparent objects.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a visual inspection-based filter lens surface defect detection device, comprising a detection device body, an adjustment bracket, two light sources, two detection mechanisms, and a drive mechanism installed inside the detection device body. A connecting column is fixedly connected to the top of the drive mechanism, and a turntable is provided on the top of the connecting column. The turntable is fixedly connected to the connecting column by bolts. Multiple equidistantly distributed fixed frames are rotatably connected to the turntable. A movable frame is slidably connected to the side of each fixed frame away from the center of the turntable. Two support plates are provided at the bottom of the turntable, and a support plate is fixedly connected to the bottom of each support plate. The bottom of the support plate is fixedly connected to the detection device body. An arc-shaped positioning ring is provided on the outer side of the turntable, and a connecting plate is fixedly connected to the bottom of the positioning ring. The other end of the connecting plate is fixedly connected to the support plate. An arc-shaped plate is provided at the notch of the positioning ring.

[0007] Furthermore, the outer wall of the turntable is provided with a rotating groove, and a rotating shaft is rotatably connected inside the rotating groove. A bevel gear is fixedly connected to one end of the rotating shaft away from the turntable. The bevel gear is fixedly connected to the fixed frame. An arc-shaped rack plate is fixedly connected between two adjacent support plates, and both rack plates mesh with the bevel gear.

[0008] Furthermore, an anti-detachment shaft is fixedly connected to the side of the movable frame away from the fixed frame, and a connecting bracket is provided on the side of the movable frame away from the fixed frame. An anti-detachment groove matching the anti-detachment shaft is opened on the side of the connecting bracket close to the movable frame. A roller is rotatably connected to the end of the connecting bracket away from the movable frame. Sliding grooves matching the rollers are opened on the inner sides of the positioning ring and the arc plate.

[0009] Furthermore, a cylinder is provided at the bottom of the arc-shaped plate, and a support frame is provided at the bottom of the cylinder. The support frame is fixedly connected to the top of the main body of the testing equipment, the cylinder is fixedly connected to the support frame, and a positioning plate is fixedly connected to the output end of the cylinder. The side wall of the positioning plate is fixedly connected to the arc-shaped plate.

[0010] Furthermore, the fixed frame has limit grooves at both ends near the movable frame. A limit rod is slidably connected to the end of the limit groove near the movable frame. The end of the limit rod near the movable frame is fixed to the movable frame. A limit plate is fixed to the end of the limit rod away from the movable frame. A spring is sleeved on the outside of the limit rod. One end of the spring is fixed to the limit plate, and the other end of the spring is fixed to the end of the limit groove.

[0011] Furthermore, gripping grooves are provided on the inner sides of both the fixed frame and the movable frame, and anti-slip pads are fixedly attached to the inner walls of both the fixed frame and the movable frame.

[0012] Furthermore, an elastic gasket is fixed to the top of the tray, and rounded corners are provided at both ends of the tray.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This vision-based filter surface defect detection device, when inspecting transparent objects such as filters, first places the object between a fixed frame and a movable frame. Then, the curved plate is moved to bring the fixed frame and the movable frame closer together, thus clamping the filter. Next, the drive mechanism drives the turntable to rotate, thereby enabling the detection mechanism to detect surface defects on the filter. Because the turntable has a support plate at its bottom and a light source that illuminates it at an angle, the reflected image of the filter received by the detection mechanism is less likely to be confused with other images, allowing the main body of the detection device to detect transparent objects.

[0014] 2. In this visual inspection-based filter lens surface defect detection device, after the filter lens passes through the first inspection mechanism, the bevel gear will mesh with the rack plate, thereby driving the fixed frame and the movable frame to rotate 180°, thus flipping the filter lens over, so that the second inspection mechanism can inspect the other side of the filter lens. At the same time, both inspection mechanisms are located above the turntable, which can improve the utilization rate of the internal space of the main body of the inspection equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the detection mechanism and turntable of the present invention; Figure 3 For the present invention Figure 2 A magnified schematic diagram of the local structure at point A; Figure 4 This is a schematic diagram of the turntable and drive mechanism of the present invention viewed from below; Figure 5 This is a schematic diagram of the connection structure between the tray and the positioning ring of the present invention; Figure 6 This is a schematic diagram of the structure of the tray and positioning ring of the present invention viewed from the left. Figure 7 This is a schematic diagram of the connection structure of the turntable, fixed frame, and movable frame of the present invention; Figure 8 For the present invention Figure 7 A magnified view of the structure at point B in the middle; Figure 9 For the present invention Figure 7 A magnified schematic diagram of the local structure at point C; Figure 10 This is a partial cross-sectional view of the tray of the present invention; Figure 11 For the present invention Figure 10 A magnified schematic diagram of the structure at point D.

[0016] In the diagram: 1. Main body of the testing equipment; 2. Adjusting bracket; 3. Light source; 4. Testing mechanism; 5. Drive mechanism; 6. Connecting column; 7. Turntable; 8. Support plate; 9. Support plate; 10. Rack plate; 11. Elastic pad; 12. Connecting plate; 13. Positioning ring; 14. Arc plate; 15. Sliding groove; 16. Positioning plate; 17. Cylinder; 18. Support frame; 19. Rotating groove; 20. Rotating shaft; 21. Bevel gear; 22. Fixed frame; 23. Movable frame; 24. Anti-slip pad; 25. Limiting groove; 26. Limiting rod; 27. Limiting plate; 28. Spring; 29. ​​Anti-detachment shaft; 30. Connecting bracket; 31. Anti-detachment groove; 32. Roller; 33. Gripping groove; 34. Filter lens. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] Please see Figures 1 to 11 A visual inspection-based filter lens surface defect detection device includes a detection device body 1. Inside the detection device body 1, there is an adjustment bracket 2, two light sources 3, two detection mechanisms 4, and a drive mechanism 5. The top of the drive mechanism 5 is fixedly connected to a connecting column 6. The top of the connecting column 6 is provided with a turntable 7. The turntable 7 is fixedly connected to the connecting column 6 by bolts. Multiple equidistant fixed frames 22 are rotatably connected to the turntable 7. A movable frame 23 is slidably connected to the side of the fixed frame 22 away from the center of the turntable 7. The bottom of the turntable 7 is provided with two support plates 9. The bottom of the support plate 9 is fixedly connected to a support plate 8. The bottom of the support plate 8 is fixedly connected to the detection device body 1. The outer side of the turntable 7 is provided with an arc-shaped positioning ring 13. The bottom of the positioning ring 13 is fixedly connected to a connecting plate 12. The other end of the connecting plate 12 is fixedly connected to the support plate 9. An arc-shaped plate 14 is provided at the notch of the positioning ring 13.

[0019] The visual inspection-based filter lens surface defect detection device of this invention, when detecting transparent objects such as filter lens 34, first places the object between the fixed frame 22 and the movable frame 23. Then, the arc plate 14 is moved so that the fixed frame 22 and the movable frame 23 move closer to each other until the arc plate 14 is aligned with the positioning ring 13. At this time, the fixed frame 22 and the movable frame 23 will also clamp the filter lens 34. Then, the drive mechanism 5 drives the turntable 7 to rotate. The turntable 7 will drive the fixed frame 22, the movable frame 23 and the filter lens 34 to move. The filter lens 34 will pass through two detection mechanisms 4 in sequence, and each detection mechanism 4 is equipped with a light source 3. At the same time, after the filter lens 34 passes through the first detection mechanism 4, the fixed frame 22 and the movable frame 23 will rotate the filter lens 34 by 180° to facilitate the second detection mechanism 4 to filter the filter. The other side of the lens 34 is used for defect detection. After the filter lens 34 passes through the second detection mechanism 4, the fixed frame 22 and the movable frame 23 will rotate the filter lens 34 180° again, so that the filter lens 34 can maintain its initial state when it returns to the initial position. Since the turntable 7 is equipped with a support plate 9 at the bottom and the light source 3 provides tilted lighting (the light source 3 and the detection mechanism 4 are both mounted on the adjustment bracket 2 and can be adjusted at will, so the light source 3 can provide tilted lighting), the image reflected by the filter lens 34 received by the detection mechanism 4 is not easily confused with other images, so that the detection equipment body 1 can perform defect detection on the surface of transparent objects. In addition, since the detection equipment body 1, the adjustment bracket 2, the light source 3, the detection mechanism 4 and the drive mechanism 5 are all existing mature products, they will not be described in detail here, and they are not shown in detail in the figure.

[0020] It is worth noting that both the turntable 7 and the tray 9 are bolted to the main body 1 of the testing equipment. If it is necessary to test opaque objects, they can still be replaced with ordinary transparent trays to improve testing efficiency.

[0021] As a preferred technical solution of the present invention, the outer wall of the turntable 7 is provided with a rotating groove 19, and a rotating shaft 20 is rotatably connected inside the rotating groove 19. A bevel gear 21 is fixedly connected to one end of the rotating shaft 20 away from the turntable 7. The bevel gear 21 is fixedly connected to the fixed frame 22. An arc-shaped rack plate 10 is fixedly connected between two adjacent support plates 9, and both rack plates 10 mesh with the bevel gear 21.

[0022] Specifically, after the filter lens 34 passes through the first detection mechanism 4, the bevel gear 21 will contact the first rack plate 10. As the turntable 7 rotates, the bevel gear 21 will mesh with the first rack plate 10, and the fixed frame 22 and the movable frame 23 will disengage from the support plate 9. Subsequently, the fixed frame 22, which is fixed to the bevel gear 21, will drive the movable frame 23 and the filter lens 34 to rotate 180° (e.g., Figure 2As shown, turntable 7 rotates clockwise, so bevel gear 21 rotates counterclockwise, which facilitates the second inspection mechanism 4 to inspect the other side of filter lens 34 for defects. After filter lens 34 passes the second inspection mechanism 4, bevel gear 21 will mesh with the second rack plate 10, and fixed frame 22 and movable frame 23 will disengage from support plate 9 again. Then, fixed frame 22, which is fixed to bevel gear 21, will drive movable frame 23 and filter lens 34 to rotate 180° again, so that filter lens 34 is rotated back to its original state, which makes it convenient to replace filter lens 34 with a new filter lens 34 after the filter lens 34 returns to its original position.

[0023] As a preferred embodiment of the present invention, an anti-detachment shaft 29 is fixedly connected to the side of the movable frame 23 away from the fixed frame 22, and a connecting bracket 30 is provided on the side of the movable frame 23 away from the fixed frame 22. An anti-detachment groove 31 matching the anti-detachment shaft 29 is opened on the side of the connecting bracket 30 close to the movable frame 23, and a roller 32 is rotatably connected to the end of the connecting bracket 30 away from the movable frame 23. A sliding groove 15 matching the roller 32 is opened on the inner side of both the positioning ring 13 and the arc plate 14.

[0024] Specifically, during the rotation of turntable 7, roller 32 is always in sliding groove 15, so fixed frame 22 and movable frame 23 can always clamp and fix filter lens 34. At the same time, anti-detachment shaft 29 and anti-detachment groove 31 are provided so that fixed frame 22 and movable frame 23 can rotate normally.

[0025] As a preferred technical solution of the present invention, the bottom of the arc plate 14 is provided with a cylinder 17, the bottom of the cylinder 17 is provided with a support frame 18, the support frame 18 is fixedly connected to the top of the main body 1 of the detection equipment, the cylinder 17 is fixedly connected to the support frame 18, the output end of the cylinder 17 is fixedly connected with a positioning plate 16, and the side wall of the positioning plate 16 is fixedly connected to the arc plate 14.

[0026] Specifically, during the loading and unloading process, the drive mechanism 5 will pause briefly. During this pause, the operator will first grasp the filter lens 34 between the fixed frame 22 and the movable frame 23, and then start the cylinder 17. The cylinder 17 will first push the positioning plate 16 to move away from the center of the turntable 7. The positioning plate 16 will move along with the arc plate 14, so that the movable frame 23 is unrestricted. Then the filter lens 34 can be replaced. After the filter lens 34 is placed between the fixed frame 22 and the movable frame 23 (at this time, the filter lens 34 should not be released), the cylinder 17 will pull the positioning plate 16 towards the center of the turntable 7 until the arc plate 14 is aligned with the positioning ring 13. At this time, the fixed frame 22 and the movable frame 23 will also clamp the filter lens 34 (at this time, the filter lens 34 can be released). In this way, the replacement of the filter lens 34 can be completed.

[0027] As a preferred embodiment of the present invention, the fixed frame 22 has limit grooves 25 at both ends near the movable frame 23. The end of the limit groove 25 near the movable frame 23 is slidably connected to a limit rod 26. The end of the limit rod 26 near the movable frame 23 is fixedly connected to the movable frame 23. The end of the limit rod 26 away from the movable frame 23 is fixedly connected to a limit plate 27. A spring 28 is sleeved on the outside of the limit rod 26. One end of the spring 28 is fixedly connected to the limit plate 27, and the other end of the spring 28 is fixedly connected to the end of the limit groove 25.

[0028] Specifically, after the curved plate 14 moves away from the turntable 7, the spring 28 will pull the limiting plate 27 toward the curved plate 14, so that the fixed frame 22 and the movable frame 23 are separated by one end, making it easier to remove the filter lens 34.

[0029] It is worth noting that: Spring 28 is preferably made of stainless steel or piano wire, which has a high fatigue limit and is suitable for long-term reciprocating motion. Its surface is treated with nickel plating or coating, which has strong corrosion resistance. The elastic force range of spring 28 is about 10N-20N, and the specific elastic force value should be changed according to the actual application requirements. This elastic force range is to avoid the occurrence of elastic failure.

[0030] As a preferred embodiment of the present invention, gripping grooves 33 are provided on the inner sides of both the fixed frame 22 and the movable frame 23, and anti-slip pads 24 are fixedly attached to the inner walls of both the fixed frame 22 and the movable frame 23.

[0031] Specifically, the gripping groove 33 makes it easier to grip the filter lens 34, and the anti-slip pad 24 can both increase the friction to prevent the filter lens 34 from falling off, and prevent the filter lens 34 from being damaged when the fixed frame 22 and the movable frame 23 are clamped.

[0032] As a preferred embodiment of the present invention, an elastic gasket 11 is fixedly connected to the top of the tray 9, and rounded corners are provided at both ends of the tray 9.

[0033] Specifically, an elastic pad 11 is provided so that even if the filter lens 34 is not held firmly when it is replaced and falls off, the filter lens 34 will not be damaged. The rounded corners can prevent the turntable 7, the fixed frame 22 or the movable frame 23 from colliding with the tray 9 and causing damage to the equipment.

[0034] It is worth noting that the turntable 7 is connected to three or more fixed frames 22 to ensure detection efficiency, and the cylinder 17 is supplied with air from an external air source, such as an air pump. When loading and unloading sheet-like objects such as filter lenses 34, manual or robotic arms can be used. The specific loading and unloading method should be changed according to the needs of the actual application. At the same time, all electrical equipment involved in this invention is controlled by the control panel of the main body 1 of the detection equipment. Since the control technology and control device are existing mature products, they will not be described in detail here, and they are not shown in detail in the figure.

[0035] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

Claims

1. A visual inspection-based filter lens surface defect detection device, comprising a detection device body (1), wherein the detection device body (1) is internally equipped with an adjustment bracket (2), two light sources (3), two detection mechanisms (4), and a drive mechanism (5), characterized in that, The top of the drive mechanism (5) is fixedly connected to the connecting column (6), and the top of the connecting column (6) is provided with a turntable (7). The turntable (7) is fixedly connected to the connecting column (6) by bolts. Multiple fixed frames (22) are rotatably connected on the turntable (7). A movable frame (23) is slidably connected to the side of the fixed frame (22) away from the center of the turntable (7). The turntable (7) has two support plates (9) at its bottom. A support plate (8) is fixedly connected to the bottom of the support plate (9). The bottom of the support plate (8) is fixedly connected to the main body (1) of the testing equipment. An arc-shaped positioning ring (13) is provided on the outer side of the turntable (7). The outer wall of the turntable (7) is provided with a rotating groove (19), and a rotating shaft (20) is rotatably connected inside the rotating groove (19). A bevel gear (21) is fixedly connected to one end of the rotating shaft (20) away from the turntable (7). The bevel gear (21) is fixedly connected to the fixed frame (22). An arc-shaped rack plate (10) is fixedly connected between two adjacent support plates (9). Both rack plates (10) mesh with the bevel gear (21).

2. The visual inspection-based filter lens surface defect detection device according to claim 1, characterized in that, The movable frame (23) is fixed with an anti-detachment shaft (29) on the side away from the fixed frame (22). The movable frame (23) is provided with a connecting bracket (30) on the side away from the fixed frame (22). The connecting bracket (30) is provided with an anti-detachment groove (31) matching the anti-detachment shaft (29) on the side close to the movable frame (23). The end of the connecting bracket (30) away from the movable frame (23) is rotatably connected with a roller (32). The inner sides of the positioning ring (13) and the arc plate (14) are both provided with sliding grooves (15) matching the roller (32).

3. The visual inspection-based filter lens surface defect detection device according to claim 1, characterized in that, The bottom of the positioning ring (13) is fixedly connected to a connecting plate (12), and the other end of the connecting plate (12) is fixedly connected to the support plate (9). An arc plate (14) is provided at the notch of the positioning ring (13).

4. The visual inspection-based filter lens surface defect detection device according to claim 1, characterized in that, The bottom of the arc plate (14) is provided with a cylinder (17), and the bottom of the cylinder (17) is provided with a support frame (18). The support frame (18) is fixedly connected to the top of the main body (1) of the testing equipment. The cylinder (17) is fixedly connected to the support frame (18). The output end of the cylinder (17) is fixedly connected with a positioning plate (16). The side wall of the positioning plate (16) is fixedly connected to the arc plate (14).

5. The visual inspection-based filter lens surface defect detection device according to claim 1, characterized in that, The fixed frame (22) has limit grooves (25) at both ends near the movable frame (23). The end of the limit groove (25) near the movable frame (23) is slidably connected to a limit rod (26). The end of the limit rod (26) near the movable frame (23) is fixedly connected to the movable frame (23). The end of the limit rod (26) away from the movable frame (23) is fixedly connected to a limit plate (27). A spring (28) is sleeved on the outside of the limit rod (26). One end of the spring (28) is fixedly connected to the limit plate (27), and the other end of the spring (28) is fixedly connected to the end of the limit groove (25).

6. The visual inspection-based filter lens surface defect detection device according to claim 1, characterized in that, The inner sides of the fixed frame (22) and the movable frame (23) are provided with gripping grooves (33), and the inner walls of the fixed frame (22) and the movable frame (23) are fixed with anti-slip pads (24).

7. The visual inspection-based filter lens surface defect detection device according to claim 1, characterized in that, An elastic pad (11) is fixed to the top of the tray (9), and rounded corners are provided at both ends of the tray (9).

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