Combined annular light source device and visual inspection system

Abstract

The utility model discloses a combined annular light source device and a visual inspection system, which are used for solving the technical problem that the existing annular light source device cannot simultaneously detect appearance defects and characters of a workpiece. The combined annular light source device comprises an outer shell, a light-transmitting through hole is formed in the outer shell in the extending direction of the central axis of the outer shell, the inner portion of the outer shell is divided into an upper annular inner side wall and a lower annular inner side wall, a high-angle irradiation module is installed on the upper annular inner side wall, and a high-angle irradiation module is installed on the lower annular inner side wall. A low-angle irradiation module is mounted on the lower annular inner side wall; wherein the high-angle irradiation module emits light along the light-transmitting through hole at a first irradiation angle, the low-angle irradiation module emits light along the light-transmitting through hole at a second irradiation angle, and the first irradiation angle is larger than the second irradiation angle.

Description

Technical Field

[0001] This utility model relates to the field of light source design technology, and in particular to a combined ring light source device and a visual inspection system. Background Technology

[0002] In existing technologies, workpiece inspection is generally accomplished through a vision inspection system, which includes a light source, an inspection camera, and a lens. There are various types of light source devices, and inspectors will choose the appropriate type based on the workpiece's inspection requirements.

[0003] Currently, when using a ring light source device to inspect workpieces, the illumination angle of the ring light source device is relatively singular. Therefore, the existing ring light source device can only meet the needs of detecting appearance defects or characters on the surface of the workpiece, and cannot simultaneously meet the needs of both appearance defect detection and character detection. This undoubtedly has a serious impact on the detection efficiency.

[0004] Therefore, finding a technical solution that can solve the above-mentioned technical problems has become an important research topic for those skilled in the art. Utility Model Content

[0005] This utility model discloses a combined ring light source device and a visual inspection system to solve the technical problem that existing ring light source devices cannot simultaneously detect workpiece appearance defects and character detection.

[0006] This utility model provides a combined ring light source device, including an outer shell, with a light-transmitting hole extended along its central axis. The outer shell is divided into an upper annular inner wall and a lower annular inner wall. A high-angle illumination module is installed on the upper annular inner wall, and a low-angle illumination module is installed on the lower annular inner wall.

[0007] The high-angle illumination module emits light along the light-transmitting hole at a first illumination angle, and the low-angle illumination module emits light along the light-transmitting hole at a second illumination angle, wherein the first illumination angle is greater than the second illumination angle.

[0008] Optionally, the high-angle illumination module includes a first annular light panel and a focusing lens;

[0009] The first annular light panel is mounted on the inner sidewall of the upper annulus and forms a first tilt angle with the outer sidewall of the outer casing;

[0010] The light-emitting end of the first annular lamp plate is tilted downward toward the light-transmitting hole;

[0011] The focusing lens is located at the light-emitting end of the first annular lamp panel.

[0012] Optionally, a first heat-conducting layer is provided between the first annular lamp plate and the inner sidewall of the upper annular structure.

[0013] Optionally, the low-angle illumination module includes a second annular light panel;

[0014] The second annular light panel is mounted on the inner sidewall of the lower annular structure and forms a second tilt angle with the outer sidewall of the outer casing, wherein the first tilt angle is greater than the second tilt angle;

[0015] The light-emitting end of the second annular lamp plate is tilted downward toward the light-transmitting hole.

[0016] Optionally, the low-angle illumination module further includes a diffuser plate;

[0017] The diffuser plate is located at the light-emitting end of the second annular lamp plate.

[0018] Optionally, a second heat-conducting layer is provided between the second annular lamp plate and the inner wall of the lower annular structure.

[0019] Optionally, the first thermally conductive layer is a thermally conductive silicone layer.

[0020] Optionally, the second thermally conductive layer is a thermally conductive silicone layer.

[0021] The present invention provides a visual inspection system, including an inspection camera, a lens, and the above-mentioned combined ring light source device;

[0022] The lens is connected to the shooting end of the detection camera.

[0023] Optionally, the detection camera is located above the combined ring light source device, and the shooting end of the detection camera is aligned with the light-transmitting through hole of the combined ring light source device.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In this embodiment of the combined ring light source device, a high-angle illumination module and a low-angle illumination module are installed sequentially along the vertical direction within the housing. The high-angle illumination module can illuminate the surface of the workpiece at a larger illumination angle through the light-transmitting hole to detect characters on the workpiece surface, while the low-angle illumination module can illuminate the surface of the workpiece at a smaller illumination angle through the light-transmitting hole to detect appearance defects. Through this design, the ring light source device can simultaneously detect characters and appearance defects on the workpiece surface, greatly improving detection efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of a combined ring light source device provided by this utility model;

[0028] Figure 2 A structural cross-sectional view of a combined ring light source device provided by this utility model;

[0029] Figure 3 An exploded view of the structure of a combined ring light source device provided by this utility model;

[0030] Figure 4 This is a schematic diagram of the structure of a vision inspection system provided by this utility model;

[0031] Figure 5 A cross-sectional view of the mechanism of a vision inspection system provided by this utility model;

[0032] Illustration: Outer shell 1; Light-transmitting hole 101; Top cover plate 102; Upper shell 103; Middle shell 104; Lower shell 105; High-angle illumination module 2; First ring light plate 201; Condensing lens 202; First heat-conducting layer 203; Low-angle illumination module 3; Second ring light plate 301; Diffuser plate 302; Second heat-conducting layer 303; Detection camera 4; Lens 5; First illumination angle a; Second illumination angle b; First tilt angle c; Second tilt angle d; Workpiece A. Detailed Implementation

[0033] This utility model discloses a combined ring light source device and a visual inspection system, which solves the technical problem that existing ring light source devices cannot simultaneously detect workpiece appearance defects and character detection.

[0034] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figures 1 to 5The present invention provides a combined ring light source device, including a housing 1, wherein the housing 1 has a light-transmitting hole 101 extending along its central axis, and the housing 1 is divided into an upper annular inner wall and a lower annular inner wall. A high-angle illumination module 2 is installed on the upper annular inner wall, and a low-angle illumination module 3 is installed on the lower annular inner wall.

[0036] The high-angle illumination module 2 emits light along the light-transmitting hole 101 at a first illumination angle, and the low-angle illumination module 3 emits light along the light-transmitting hole 101 at a second illumination angle, wherein the first illumination angle is greater than the second illumination angle.

[0037] It should be noted that the first illumination angle is specifically the angle formed by the light emitted by the high-angle illumination module 2 and the horizontal plane, and the second illumination angle is specifically the angle formed by the light emitted by the low-angle illumination module 3 and the horizontal plane.

[0038] In addition, in this embodiment, the outer shell 1 is specifically formed by sequentially assembling a top cover plate 102, an upper shell 103, a middle shell 104, and a lower shell 105. The inner wall of the upper shell 103 is an upper annular inner wall, and the inner wall of the lower shell 105 is a lower annular inner wall.

[0039] In this embodiment of the combined ring light source device, a high-angle illumination module 2 and a low-angle illumination module 3 are installed sequentially along the vertical direction inside the outer casing 1. The high-angle illumination module 2 can illuminate the surface of the workpiece at a larger illumination angle through the light-transmitting hole 101 to detect characters on the workpiece surface, while the low-angle illumination module 3 can illuminate the surface of the workpiece at a smaller illumination angle through the light-transmitting hole 101 to detect appearance defects on the workpiece. Through the above design, the ring light source device can simultaneously detect characters and appearance defects on the workpiece surface, greatly improving the detection efficiency.

[0040] Furthermore, the high-angle illumination module 2 in this embodiment includes a first annular lamp panel 201 and a focusing lens 202;

[0041] The first annular lamp plate 201 is mounted on the inner sidewall of the upper annular structure and forms a first tilt angle with the outer sidewall of the outer casing 1;

[0042] The light-emitting end of the first annular lamp plate 201 is inclined downward toward the light-transmitting hole 101;

[0043] The condenser lens 202 is located at the light-emitting end of the first annular lamp plate 201.

[0044] It should be noted that, through the above design, by setting the condenser lens 202) at the light-emitting end of the first annular light plate 201, the directionality of the light emitted by the first annular light plate can be improved, so that the high-angle illumination module 2 can accurately illuminate the characters on the surface of the workpiece, thereby enabling the annular light source device to complete character detection.

[0045] Furthermore, in this embodiment, a first heat-conducting layer 203 is provided between the first annular lamp plate 201 and the inner sidewall of the upper annular structure.

[0046] Specifically, the first thermally conductive layer 203 mentioned above can be selected as a thermally conductive silicone thermally conductive layer.

[0047] It should be noted that since the first annular light panel 201 generates a lot of heat when it is working, the design of a first heat-conducting layer 203 between the first annular light panel 201 and the inner wall of the upper annulus can accelerate heat transfer and prevent the first annular light panel 201 from getting too hot and affecting its operation.

[0048] Furthermore, the low-angle illumination module 3 in this embodiment includes a second annular lamp panel 301;

[0049] The second annular lamp plate 301 is mounted on the inner sidewall of the lower annular structure and forms a second tilt angle with the outer sidewall of the outer casing 1, wherein the first tilt angle is greater than the second tilt angle;

[0050] The light-emitting end of the second annular lamp plate 301 is tilted downward toward the light-transmitting hole 101.

[0051] It should be noted that the second annular light panel 301 in this embodiment specifically adopts a structure with a high density of LED beads.

[0052] Furthermore, the low-angle illumination module 3 in this embodiment also includes a diffuser plate 302;

[0053] The diffuser plate 302 is located at the light-emitting end of the second annular lamp plate 301.

[0054] It should be noted that, through the above design, the light emitted by the second annular light panel 301 can diffuse to a wider range to cover the appearance of the workpiece.

[0055] Furthermore, in this embodiment, a second heat-conducting layer 303 is provided between the second annular lamp plate 301 and the lower annular inner sidewall.

[0056] Specifically, the second thermally conductive layer 303 mentioned above can be selected as a thermally conductive silicone thermally conductive layer.

[0057] It should be noted that since the second annular light panel 301 generates a lot of heat when it is working, the design of a second heat-conducting layer 303 between the second annular light panel 301 and the inner wall of the lower annulus can accelerate heat transfer and prevent the second annular light panel 301 from getting too hot and affecting its operation.

[0058] Please see Figures 1 to 5 The present invention provides a visual inspection system, including an inspection camera 4, a lens 5, and the above-mentioned combined ring light source device;

[0059] The lens 5 is connected to the shooting end of the detection camera 4.

[0060] Furthermore, the detection camera 4 is located above the combined ring light source device, and the shooting end of the detection camera 4 is aligned with the light-transmitting through hole 101 of the combined ring light source device.

[0061] It should be noted that in the visual inspection system of this embodiment, the high-angle illumination module 2 can illuminate the surface of the workpiece through the light-transmitting hole 101 at a larger illumination angle to detect characters on the workpiece surface. The light reflected by the workpiece enters the inspection camera 4 through the light-transmitting hole 101 and the lens 5. The low-angle illumination module 3 can illuminate the surface of the workpiece through the light-transmitting hole 101 at a smaller illumination angle to detect appearance defects on the workpiece. The light reflected by the workpiece enters the inspection camera 4 through the light-transmitting hole 101 and the lens 5. Finally, the inspection camera 4 combines the two types of light to obtain images of the workpiece appearance and the characters on the workpiece, thereby completing the inspection.

[0062] The above provides a detailed description of the combined ring light source device and visual inspection system provided by this utility model. For those skilled in the art, based on the ideas of the embodiments of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A combined ring light source device, characterized in that, Includes an outer shell (1), the outer shell (1) having a light-transmitting through hole (101) extending along its central axis, the inner part of the outer shell (1) being divided into an upper annular inner wall and a lower annular inner wall, wherein a high-angle irradiation module (2) is installed on the upper annular inner wall and a low-angle irradiation module (3) is installed on the lower annular inner wall. The high-angle irradiation module (2) emits light along the light-transmitting hole (101) at a first irradiation angle, and the low-angle irradiation module (3) emits light along the light-transmitting hole (101) at a second irradiation angle, wherein the first irradiation angle is greater than the second irradiation angle.

2. The combined ring light source device according to claim 1, characterized in that, The high-angle illumination module (2) includes a first annular lamp panel (201) and a focusing lens (202); The first annular lamp plate (201) is installed on the inner side wall of the upper annular structure and forms a first tilt angle with the outer side wall of the outer shell (1); The light-emitting end of the first annular lamp plate (201) is tilted downward toward the light-transmitting hole (101). The condenser lens (202) is located at the light-emitting end of the first annular lamp plate (201).

3. The combined ring light source device according to claim 1, characterized in that, A first heat-conducting layer (203) is provided between the first annular lamp plate (201) and the inner sidewall of the upper annular structure.

4. The combined ring light source device according to claim 2, characterized in that, The low-angle illumination module (3) includes a second annular lamp panel (301); The second annular lamp plate (301) is installed on the inner side wall of the lower annular structure and forms a second tilt angle with the outer side wall of the outer shell (1), wherein the first tilt angle is greater than the second tilt angle; The light-emitting end of the second annular lamp plate (301) is tilted downward toward the light-transmitting hole (101).

5. The combined ring light source device according to claim 4, characterized in that, The low-angle illumination module (3) also includes a diffuser plate (302); The diffuser plate (302) is located at the light-emitting end of the second annular lamp plate (301).

6. The combined ring light source device according to claim 4, characterized in that, A second heat-conducting layer (303) is provided between the second annular lamp plate (301) and the inner wall of the lower annular ring.

7. The combined ring light source device according to claim 3, characterized in that, The first thermally conductive layer (203) is a thermally conductive silicone layer.

8. The combined ring light source device according to claim 6, characterized in that, The second thermally conductive layer (303) is a thermally conductive silicone layer.

9. A visual inspection system, characterized in that, Includes a detection camera (4), a lens (5), and a combined ring light source device as described in any one of claims 1 to 8; The lens (5) is connected to the shooting end of the detection camera (4).

10. The visual inspection system according to claim 9, characterized in that, The detection camera (4) is located above the combined ring light source device, and the shooting end of the detection camera (4) is aligned with the light-transmitting through hole (101) of the combined ring light source device.

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