Multi-modal combined ring light source and vision mechanism

Abstract

This utility model relates to the field of visual inspection technology, specifically a multimodal combined ring light source and a vision mechanism. In this utility model, the light source components within adjacent annular grooves are staggered in the vertical direction of the housing, resulting in a bowl-shaped structure with a circular hole at the bottom. This allows the emitted light to shine upwards, illuminating the target area and covering the entire inspection position of the workpiece, facilitating subsequent visual inspection. The inspection is convenient and highly accurate. The light source components on adjacent annular grooves have different illumination angles. The inner diameter of all light source components within the housing gradually increases from bottom to top, and the corresponding illumination angle also gradually increases. This simulates high / low angle illumination, producing different lighting effects at different angles, thereby improving the detection capability of product defects and meeting the diverse lighting needs of various products.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection technology, and specifically to a multimodal combined ring light source and visual mechanism. Background Technology

[0002] The inspection of existing workpieces is generally carried out through visual inspection. Typically, a light source device emits light onto the surface of the workpiece to be inspected, and an industrial camera is used to capture the light reflected from the surface to form an image.

[0003] In existing ring light source devices, each light source can only be fixed at a preset angle, and the angle cannot be adjusted according to the needs, which affects the detection capability of product defects. When different angles of illumination are required, multiple ring light source devices need to be used, which takes up a lot of space and increases the detection cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a multimodal combination ring light source and vision mechanism that facilitates visual inspection, has high detection accuracy, provides lighting effects at different angles, and improves the ability to detect product defects.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A multimodal combined ring light source, comprising:

[0007] The shell has multiple annular grooves, with adjacent annular grooves arranged in a stepped structure;

[0008] A light source component is disposed on the annular groove. The light source component has an annular structure. The light source components in adjacent annular grooves are staggered in the vertical direction of the housing, so that the multimodal combined annular light source has a bowl-shaped structure with a round hole at the bottom.

[0009] The light-emitting angles of the light source components on adjacent annular grooves are different. The inner diameter of all light source components in the housing gradually increases from bottom to top, and the corresponding light-emitting angle of the light source component also gradually increases. All light source components in the housing are used to synchronously illuminate the lighting position.

[0010] In one embodiment of this utility model, the light source component includes a green light source, a blue light source, and a red light source, which are arranged sequentially from bottom to top on the housing.

[0011] In one embodiment of this utility model, the illumination angle of the green light source is 20°-40°, and the wavelength of the green light source is 520nm-532nm.

[0012] In one embodiment of this utility model, the illumination angle of the blue light source is 40°-50°, and the wavelength of the blue light source is 420nm-460nm.

[0013] In one embodiment of this utility model, the illumination angle of the red light source is 50°-75°, and the wavelength of the red light source is 620nm-640nm.

[0014] This utility model also includes a vision mechanism, comprising a camera assembly, a material-grabbing assembly for grasping the workpiece to be inspected, and the aforementioned multimodal combined ring light source. The camera assembly is disposed at the bottom circular hole of the multimodal combined ring light source. The material-grabbing assembly is used to transport the workpiece to be inspected to the lighting position. The camera assembly is used to perform visual defect detection on the workpiece to be inspected illuminated by the multimodal combined ring light source.

[0015] In one embodiment of the present invention, the camera assembly includes a camera frame, on which a detection camera for detecting the bottom surface of a workpiece to be detected is disposed. A central light source is disposed on the camera frame, and the central light source is concentrically disposed with the multimodal combined ring light source. The detection camera is disposed below the central light source and is used to detect defects on the detection surface of the workpiece to be detected.

[0016] In one embodiment of this utility model, the camera frame is characterized by having a plurality of inclined plates evenly arranged on the camera frame, and test cameras are arranged on the inclined plates such that the test cameras are all arranged opposite to the lighting position, the plurality of test cameras are arranged around the central light source, and the plurality of test cameras are used to detect edge defects on the detection surface of the workpiece to be tested.

[0017] In one embodiment of this utility model, a lifting frame is further included, on which a sliding frame is slidably mounted. The camera assembly is mounted on the sliding frame. An adjusting rod is mounted on the lifting frame, and an adjusting seat is slidably mounted on the adjusting rod. The multimodal combined ring light source is mounted on the adjusting seat. A fixing block is mounted on the adjusting rod, and an adjusting bolt is mounted on the fixing block. The fixing block and the adjusting seat are connected by the adjusting bolt.

[0018] In one embodiment of this utility model, the material handling assembly includes a transport frame, on which a linear module is disposed, the linear module being drivenly connected to a movable frame, and multiple material handling racks are evenly disposed on the movable frame, each material handling rack being provided with a material handling rod, and each material handling rod being provided with a vacuum nozzle for picking up the workpiece to be inspected.

[0019] The beneficial effects of this utility model are:

[0020] In this invention, the light source components within adjacent annular grooves are staggered in the vertical direction of the housing, resulting in a bowl-shaped structure with a circular hole at the bottom. This allows the emitted light to shine upwards, illuminating the target area and covering the entire inspection position of the workpiece. This facilitates subsequent visual inspection, making inspection convenient and highly accurate. The light source components on adjacent annular grooves have different illumination angles. The inner diameter of all light source components within the housing gradually increases from bottom to top, and the corresponding illumination angle also gradually increases. This simulates high / low angle illumination, producing different lighting effects at different angles, thereby improving the detection capability of product defects and meeting the diverse lighting needs of various products. The housing has multiple annular grooves arranged in a stepped structure, preventing interference between adjacent light source components and avoiding stray light interference with the inspection position. This increases image contrast and improves product inspection accuracy. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a multimodal combined ring light source according to this utility model.

[0022] Figure 2 This is a schematic diagram of the vision mechanism of this utility model.

[0023] Figure 3 This is a schematic diagram of the camera component of this utility model.

[0024] The following are the labels in the diagram: 1. Housing; 11. Light source component; 12. Annular groove; 13. Circular hole; 2. Material handling assembly; 21. Transport frame; 22. Linear module; 23. Movable frame; 24. Material handling rod; 25. Vacuum nozzle; 3. Camera assembly; 31. Camera stand; 32. Central light source; 33. Inspection camera; 34. Inclined plate; 35. Test camera; 36. Lighting position; 4. Lifting frame; 41. Sliding frame; 42. Adjusting rod; 43. Adjusting seat; 44. Fixing block; 45. Adjusting bolt. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0026] Reference Figure 1-3 As shown, a multimodal combined ring light source includes:

[0027] The housing 1 has multiple annular grooves 12, with adjacent annular grooves 12 arranged in a stepped structure.

[0028] A light source component 11 is disposed on the annular groove 12. The light source component 11 has an annular structure. The light source components 11 in adjacent annular grooves 12 are staggered in the vertical direction of the housing 1, so that the multimodal combined annular light source has a bowl-shaped structure with a round hole 13 at the bottom.

[0029] Among them, the light-emitting angles of the light source components 11 on the adjacent annular grooves 12 are different. The inner diameter of all the light source components 11 in the housing 1 gradually increases from bottom to top, and the light-emitting angle corresponding to the light source component 11 also gradually increases. All the light source components 11 in the housing 1 are used to synchronously illuminate the light-emitting position 36.

[0030] The lighting angle is the angle between the light-emitting surface of the light source component and the plane of the lighting position.

[0031] In this invention, the light source components 11 within adjacent annular grooves 12 are staggered in the vertical direction of the housing 1, resulting in a bowl-shaped structure with a circular hole 13 at the bottom of the multimodal combined annular light source. This allows the emitted light to shine upwards onto the illumination position 36, covering the entire detection position of the workpiece to be inspected. This facilitates subsequent visual inspection, making inspection convenient and highly accurate. The illumination angles of the light source components 11 on adjacent annular grooves 12 are different. The inner diameter of all light source components 11 within the housing 1 gradually increases from bottom to top, and the corresponding illumination angle of each light source component 11 also gradually increases. This can simulate high / low angle illumination methods, producing different illumination effects at different angles, thereby improving the detection capability of product defects and meeting the diverse lighting needs of various products. The housing 1 has multiple annular grooves 12, with adjacent annular grooves 12 arranged in a stepped structure. Adjacent light source components 11 do not interfere with each other, avoiding stray light interference with the detection position, increasing image contrast, and improving product inspection accuracy.

[0032] In one embodiment of the present invention, the light source component 11 includes a green light source, a blue light source, and a red light source, which are arranged sequentially from bottom to top on the housing 1.

[0033] Specifically, green, blue, and red light sources are arranged sequentially from bottom to top on the housing 1, so that the ring light source can illuminate products of different materials and colors with different wavelengths, thereby improving the surface recognition of products of different materials and being compatible with products of multiple materials.

[0034] In one embodiment of this utility model, the illumination angle of the green light source is 20°-40°, and the wavelength of the green light source is 520nm-532nm.

[0035] In one embodiment of this utility model, the illumination angle of the blue light source is 40°-50°, and the wavelength of the blue light source is 420nm-460nm.

[0036] In one embodiment of this utility model, the illumination angle of the red light source is 50°-75°, and the wavelength of the red light source is 620nm-640nm.

[0037] In a preferred embodiment of this invention, the number of all light source components 11 inside the housing 1 is 3. In other embodiments, more can be set according to actual needs. This invention does not limit this. That is, the light source components are designed in 3 layers, and each layer has a different angle. At the same time, the lighting angle of the green light source located at the bottom layer of the housing 1 is 30°, the lighting angle of the blue light source located at the second layer of the housing 1 is 45°, and the lighting angle of the red light source located at the third layer of the housing 1 is 60°. This can simulate high / low angle lighting mode and improve the detection capability of product defects.

[0038] The preferred embodiment of this invention is that the wavelength of the green light source is 525 nm, the wavelength of the blue light source is 440 nm, and the wavelength of the red light source is 625 nm, which can improve the surface recognition of products made of different materials and is compatible with products made of multiple materials.

[0039] The light source component 11 of this utility model uses Nichia high-brightness plug-in LED beads, which have good consistency and long service life, and the light emission angle is selected at 30° to reduce the reflection angle.

[0040] This utility model also includes a vision mechanism, including a camera assembly 3, a material handling assembly 2 for grasping the workpiece to be inspected, and the aforementioned multimodal combined ring light source. The camera assembly 3 is disposed at the bottom circular hole 13 of the multimodal combined ring light source. The material handling assembly 2 is used to transport the workpiece to be inspected to the lighting position 36. The camera assembly 3 is used to perform visual defect detection on the workpiece to be inspected illuminated by the multimodal combined ring light source.

[0041] The workpiece to be inspected is picked up by the material handling component 2 and placed at the lighting position 36. The workpiece is then illuminated by a multimodal combined ring light source. The camera component 3 performs visual defect detection on the workpiece illuminated by the multimodal combined ring light source. The multimodal combined ring light source provides the light source for the camera component 3 to take pictures, thus it does not rely on ambient light sources and is less likely to have dead zones in the lighting. The camera component 3 is located below the multimodal combined ring light source, so the lighting is uniform, which is conducive to clear shooting.

[0042] In one embodiment of the present invention, the camera assembly 3 includes a camera frame 31, on which a detection camera 33 for detecting the bottom surface of the workpiece to be detected is disposed. A central light source 32 is disposed on the camera frame 31, and the central light source 32 is concentrically disposed with the multimodal combined ring light source. The detection camera 33 is disposed below the central light source 32 and is used to detect defects on the detection surface of the workpiece to be detected.

[0043] Specifically, a multimodal combined ring light source illuminates the workpiece to be inspected, while the central light source 32, also a ring light source, illuminates the workpiece to be inspected. The inspection camera 33 is positioned below the central light source 32 and is used to detect defects on the inspection surface of the workpiece. It can adapt to visual inspection of workpieces of different sizes and has high inspection efficiency.

[0044] In one embodiment of the present invention, the camera frame 31 is characterized by having a plurality of inclined plates 34 evenly arranged on the camera frame 31, and a test camera 35 is arranged on the inclined plate 34, such that the test camera 35 is arranged opposite to the lighting position 36, the plurality of test cameras 35 are arranged around the central light source 32, and the plurality of test cameras 35 are used to detect edge defects on the detection surface of the workpiece to be tested.

[0045] Specifically, multiple test cameras 35 are arranged around the central light source 32. The multiple test cameras 35 arranged around the central light source 32 detect the edge defects of the inspection surface of the workpiece to be inspected. This can detect the edge defects of the inspection surface, improve the surface recognition of products of different materials, be compatible with products of multiple materials, and can simultaneously detect the edge of the workpiece to be inspected, thereby improving the inspection accuracy of the workpiece to be inspected.

[0046] Multiple test cameras take photos from multiple angles, avoiding blind spots, and the processed photos provide more accurate data on the workpiece under test.

[0047] In one embodiment of this utility model, a lifting frame 4 is further included. A sliding frame 41 is slidably mounted on the lifting frame 4. The camera assembly 3 is mounted on the sliding frame 41. An adjusting rod 42 is mounted on the lifting frame 4. An adjusting seat 43 is slidably mounted on the adjusting rod 42. The multimodal combined ring light source is mounted on the adjusting seat 43. A fixing block 44 is mounted on the adjusting rod 42. An adjusting bolt 45 is mounted on the fixing block 44. The fixing block 44 and the adjusting seat 43 are connected by the adjusting bolt 45.

[0048] Specifically, a sliding frame 41 is slidably mounted on the lifting frame 4, and the camera assembly 3 is mounted on the sliding frame 41. After adjusting the relative position between the sliding frame 41 and the lifting frame 4, the relative position between the multimodal combined ring light source and the camera assembly 3 can be adjusted. The camera assembly 3 is then fixedly connected by bolts and other fasteners, which can ensure the detection accuracy of the workpiece to be inspected and improve the ability to detect product defects.

[0049] An adjusting bolt 45 is provided on the fixing block 44. The fixing block 44 and the adjusting seat 43 are connected by the adjusting bolt 45. Since the adjusting seat 43 is slidably mounted on the adjusting rod 42, the relative position between the adjusting seat 43 and the fixing block 44 can be adjusted by rotating the adjusting bolt 45. This adjusts the relative position between the multimodal combined ring light source and the camera assembly 3 or the workpiece to be inspected, resulting in better lighting effect of the multimodal combined ring light source on the workpiece to be inspected, increased image contrast, and improved product inspection accuracy.

[0050] In one embodiment of the present invention, the material handling component 2 includes a conveying frame 21, on which a linear module 22 is provided. The linear module 22 is drivenly connected to a movable frame 23. Multiple material handling frames are evenly arranged on the movable frame 23. Material handling frames are provided with material handling rods 24. Material handling rods 24 are provided with vacuum nozzles 25 for picking up workpieces to be inspected.

[0051] Specifically, the material handling component 2 is connected to a robotic arm or other handling drive equipment. The robotic arm drives the material handling component 2 to move and picks up the workpieces to be inspected through multiple vacuum nozzles 25 on it. Multiple workpieces to be inspected can be picked up at one time, resulting in high handling efficiency. At the same time, the camera component 3 can also perform simultaneous inspection of multiple workpieces to be inspected, which greatly improves the inspection efficiency. The robotic arm drives the material handling component 2 to move and pick up materials, which can realize online visual inspection of the workpieces to be inspected and speed up the inspection cycle.

[0052] Usage process

[0053] The material handling component 2 is connected to a robotic arm or other handling drive equipment. The robotic arm drives the material handling component 2 to the material handling position to pick up the workpiece to be inspected and transfer the workpiece to be inspected to the position above the multimodal combined ring light source, i.e., the lighting position 36. The multimodal combined ring light source illuminates the workpiece to be inspected, and the central light source 32, which is a ring light, also illuminates the workpiece to be inspected. The inspection camera 33 is set below the central light source 32 and is used to detect defects on the inspection surface of the workpiece to be inspected. At the same time, multiple test cameras 35 surrounding the central light source 32 detect edge defects on the inspection surface of the workpiece to be inspected. The multimodal combined ring light source increases the image contrast and improves the accuracy of product inspection, thereby performing visual defect detection on the workpiece to be inspected.

[0054] This invention can be adapted to defect detection of silicon wafers, solar cells, or chip products of different sizes, with high detection efficiency.

[0055] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A multi-modal combined ring light source, characterized by, include: The shell has multiple annular grooves, with adjacent annular grooves arranged in a stepped structure; A light source component is disposed on the annular groove. The light source component has an annular structure. The light source components in adjacent annular grooves are staggered in the vertical direction of the housing, so that the multimodal combined annular light source has a bowl-shaped structure with a round hole at the bottom. The light-emitting angles of the light source components on adjacent annular grooves are different. The inner diameter of all light source components in the housing gradually increases from bottom to top, and the corresponding light-emitting angle of the light source component also gradually increases. All light source components in the housing are used to synchronously illuminate the lighting position.

2. The multi-modal combined ring light source of claim 1, wherein, The light source component includes a green light source, a blue light source, and a red light source, which are arranged sequentially from bottom to top on the housing.

3. The multi-modal combined ring light source of claim 2, wherein, The green light source has a lighting angle of 20°-40° and a wavelength of 520nm-532nm.

4. The multi-modal combined ring light source of claim 2, wherein, The blue light source has a illumination angle of 40°-50° and a wavelength of 420nm-460nm.

5. The multi-modal combined ring light source of claim 2, wherein, The illumination angle of the red light source is 50°-75°, and the wavelength of the red light source is 620nm-640nm.

6. A vision mechanism, characterized in that, The device includes a camera assembly, a material handling assembly for grasping a workpiece to be inspected, and a multimodal combined ring light source as described in any one of claims 1 to 5. The camera assembly is disposed at the bottom circular hole of the multimodal combined ring light source. The material handling assembly is used to transport the workpiece to be inspected to the lighting position. The camera assembly is used to perform visual defect detection on the workpiece illuminated by the multimodal combined ring light source.

7. The visual mechanism of claim 6, wherein, The camera assembly includes a camera frame, on which a detection camera for detecting the bottom surface of the workpiece to be inspected is mounted. A central light source is mounted on the camera frame, and the central light source is concentrically arranged with the multimodal combined ring light source. The detection camera is positioned below the central light source and is used to detect defects on the inspection surface of the workpiece to be inspected.

8. The visual mechanism of claim 7, wherein Multiple inclined plates are evenly arranged on the camera frame, and test cameras are set on the inclined plates, such that the test cameras are all set opposite to the lighting position. The multiple test cameras are arranged around the central light source and are used to detect edge defects on the inspection surface of the workpiece to be inspected.

9. The visual mechanism of claim 6, wherein, It also includes a lifting frame, on which a sliding frame is slidably mounted. The camera assembly is mounted on the sliding frame. An adjusting rod is mounted on the lifting frame. An adjusting seat is slidably mounted on the adjusting rod. The multimodal combined ring light source is mounted on the adjusting seat. A fixing block is mounted on the adjusting rod. An adjusting bolt is mounted on the fixing block. The fixing block and the adjusting seat are connected by the adjusting bolt.

10. The visual mechanism of claim 6, wherein, The material handling assembly includes a transport frame, on which a linear module is mounted. The linear module is driven and connected to a movable frame. Multiple material handling racks are evenly arranged on the movable frame. Each material handling rack is equipped with a material handling rod, and each material handling rod is equipped with a vacuum nozzle for picking up the workpiece to be inspected.

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