CN220188390U - Optical detection device - Google Patents
Optical detection device Download PDFInfo
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- CN220188390U CN220188390U CN202321562903.XU CN202321562903U CN220188390U CN 220188390 U CN220188390 U CN 220188390U CN 202321562903 U CN202321562903 U CN 202321562903U CN 220188390 U CN220188390 U CN 220188390U
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- 238000001514 detection method Methods 0.000 title claims abstract description 57
- 230000003287 optical effect Effects 0.000 title claims abstract description 24
- 230000000712 assembly Effects 0.000 claims description 15
- 238000000429 assembly Methods 0.000 claims description 15
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 238000009434 installation Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 20
- 238000005192 partition Methods 0.000 abstract description 11
- 238000005286 illumination Methods 0.000 abstract description 9
- 230000001678 irradiating effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 14
- 239000011324 bead Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000005498 polishing Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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Abstract
The utility model provides an optical detection device, which comprises a camera, a semi-transparent semi-reflecting mirror, a coaxial light source, a bowl light source and a low-angle ring light source, wherein: the half-mirror is used for reflecting the horizontal light rays emitted by the coaxial light source into vertical downward coaxial light rays and projecting the vertical downward coaxial light rays onto a target object below; the bowl light source is positioned below the semi-transparent semi-reflecting mirror and is used for irradiating a target object from different directions; the low-angle annular light source is arranged below the bowl light source and irradiates the target object from the periphery; the reflected light reflected by the target object reaches the half mirror along the central axis of the bowl light source and is transmitted into the camera through the half mirror. According to the utility model, the illumination intensity of the target object is improved by adopting the coaxial light source and the low-angle annular light source, and the target object is subjected to partition illumination by adopting the partition bowl light source so as to obtain the image of the target object from multiple directions, so that the surface defect detection of the target object is implemented, and the surface defect detection precision is improved.
Description
Technical Field
The utility model relates to the field of battery detection, in particular to an optical detection device.
Background
After the production of battery products such as cylindrical cells is completed, surface defect detection is required. At present, the annular partition light source is used for carrying out partition irradiation on the target object to be detected, so that the detection camera can acquire images of the target object from multiple directions, and finally, the surface defect detection of the target object is carried out.
The main defects of the existing detection mode are as follows: when polishing is carried out on the positive electrode of some special parts, such as a cylindrical battery cell, the brightness of a simple annular partition light source is not high due to more folds on the surface of an object, and the surface defect of an image obtained after polishing is not obvious, so that the problem of low detection precision of a detection device is caused.
Disclosure of Invention
In order to solve the technical problems, the utility model provides an optical detection device, which has the following specific technical scheme:
an optical detection device comprises a camera, a semi-transparent semi-reflecting mirror, a coaxial light source, a bowl light source and a low-angle ring light source, wherein:
the semi-transparent semi-reflecting mirror is obliquely arranged at a forty-five degree angle, and the camera is arranged above the semi-transparent semi-reflecting mirror;
the coaxial light source is positioned at the side of the half-mirror, and the half-mirror is used for reflecting the horizontal light rays emitted by the coaxial light source into vertical downward coaxial light rays, so that the coaxial light rays vertically downward project to a target object to be detected below through the first light through hole of the bowl light source;
the bowl light source is positioned below the semi-transparent and semi-reflective mirror and comprises a first annular mounting seat, a bowl-shaped reflecting cover and at least three first light-emitting components, wherein the bottom of the bowl-shaped reflecting cover is arranged on the upper end face of the first annular mounting seat, the at least three first light-emitting components are uniformly arranged on the inner side of the first annular mounting seat at equal intervals along the circumferential direction, and the bowl-shaped reflecting cover is used for reflecting light rays emitted by each first light-emitting component downwards from different angles to a target object;
the low-angle annular light source is arranged below the bowl light source and comprises a second annular mounting seat and an annular light-emitting component, the second annular mounting seat and the first annular mounting seat are coaxially arranged, the annular light-emitting component is arranged on the inner side of the second annular mounting seat, and the annular light-emitting component irradiates light on a target object from the periphery at a preset angle;
the reflected light reflected by the target object reaches the half mirror along the central axis of the bowl light source and is transmitted into the camera through the half mirror.
According to the optical detection device, the coaxial light source and the low-angle annular light source are adopted to improve the illumination intensity of the target object, and the partition bowl light source is adopted to conduct partition illumination on the target object, so that the camera obtains images of the target object from multiple directions, and surface defect detection of the target object is implemented. Compared with the prior art that the annular partition light source is adopted to implement partition irradiation on the target object, the method can greatly improve the irradiation brightness on the target object, thereby improving the surface defect detection precision of the optical detection device.
In some embodiments, the first light through hole is open at a top center of the bowl-shaped reflecting cover; the coaxial light is vertically projected onto the target object through the first light through hole; the reflected light reaches the half mirror through the first light through hole.
Through seting up the top center at bowl shape reflector with first light through-hole, can ensure that coaxial light can pass bowl shape reflector and vertically throw to the object, reflection light can pass bowl shape reflector reflection to the semi-transparent mirror on.
In some embodiments, the half mirror and the coaxial light source are packaged within the same square mounting housing, wherein: the top of the square mounting shell is provided with a second light through hole for the reflected light to pass through; the semi-transparent semi-reflecting mirror is positioned below the second light through hole, and the coaxial light source is arranged on the inner wall of one side of the square installation shell.
Through with in half mirror and the same square installation casing of coaxial light source encapsulation, guaranteed the stability of the mounted position of half mirror and coaxial light source, ensure half mirror can throw the horizontal light that coaxial light source sent along vertical direction accurately to the object of below. By providing the second light through hole at the top of the square mounting housing, it is ensured that reflected light reflected by the target object can be reflected into the camera.
In one embodiment, the brightness of the on-axis light source is consistent with the brightness of the bowl light source.
In some embodiments, the number of first light emitting components is 4 or 8.
By arranging 4 first light-emitting assemblies, the target object can be respectively irradiated from 4 directions, so that images of the target object in 4 directions are obtained, and finally, the surface defect detection of the target object is implemented based on the images in 4 directions. By arranging 8 first light-emitting assemblies, the target object can be respectively irradiated from 8 directions, so that 8-direction images of the target object are obtained, and finally, the surface defect detection of the target object is implemented based on the 8-direction images.
In some embodiments, the optical detection device further comprises a stiffening ring light source disposed between the bowl light source and the low angle ring light source, wherein: the reinforcing ring light source comprises a third annular mounting seat and a second light-emitting component, the third annular mounting seat and the first annular mounting seat are coaxially arranged, and the second light-emitting component is arranged on the inner side of the third annular mounting seat and is used for supplementing light to the bowl light source.
By arranging the reinforcing annular light source, the bowl light source is supplemented with light, and therefore surface defect detection accuracy is improved.
In some embodiments, the number of the second light emitting assemblies is at least three, the at least three second light emitting assemblies are arranged in one-to-one correspondence with the first light emitting assemblies and are uniformly arranged on the inner side of the third annular mounting seat at equal intervals, and each second light emitting assembly is used for supplementing light for the corresponding first light emitting assembly.
The second light-emitting components are arranged in one-to-one correspondence with the first light-emitting components, and when each first light-emitting component irradiates a target object from a corresponding direction, the corresponding second light-emitting component implements targeted light supplement in the direction, so that the definition of an image in the direction acquired by the camera is further improved, and finally the surface defect detection precision is further improved.
In some embodiments, during the detection process, the annular light emitting components of the coaxial light source and the low-angle annular light source maintain a light emitting state, and each first light emitting component of the bowl light source is rotated to the light emitting state according to a predetermined rule.
The coaxial light source and the low-angle annular light source are kept in a luminous state, and in the detection process, the luminous state control of the coaxial light source and the low-angle annular light source is not required, so that the detection process is simpler. The first light-emitting components of the bowl light source are controlled to rotate to a light-emitting state according to a preset rule, so that the images of the target object in different directions are obtained.
In some embodiments, the angle between the light emission direction of the annular light emitting assembly and the horizontal plane is 0 ° -60 °.
The light emission angle of the annular light-emitting component is set, so that the emitted light of the annular light-emitting component can be obliquely downwards irradiated to the target object from the periphery.
In some embodiments, the bowl light source is 80-90mm from the target object.
By setting the distance between the bowl light source and the target object, the whole target object is ensured to be in the irradiation range of the bowl light source.
Drawings
FIG. 1 is a schematic diagram of an optical detection device according to the present utility model;
FIG. 2 is a schematic illustration of the construction of a half mirror and coaxial light source enclosed within a square mounting housing;
FIG. 3 is a schematic view of a bowl light source in an embodiment of the utility model;
FIG. 4 is a schematic diagram of a low angle ring light source according to an embodiment of the present utility model;
fig. 1 to 4 include:
the camera 1, the half mirror 2, the coaxial light source 3, the bowl light source 4, the low-angle annular light source 5, the reinforced annular light source 6, the square mounting shell 7, the first annular mounting seat 41, the first luminous component 42, the bowl-shaped reflecting cover 43, the first light through hole 44, the second annular mounting seat 51, the annular luminous component 52, the third annular mounting seat 61 and the second luminous component 62;
a target object 100.
Detailed Description
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 4, the optical detection device provided by the present utility model includes a camera 1, a half mirror 2, a coaxial light source 3, a bowl light source 4 and a low-angle ring light source 5, wherein:
the half mirror 2 is obliquely arranged at a forty-five degree angle, and the camera 1 is arranged above the half mirror 2.
The coaxial light source 3 is located at the side of the half mirror 2, and the half mirror 2 is used for reflecting the horizontal light emitted by the coaxial light source 3 into the vertical downward coaxial light, so that the coaxial light is projected to the target object 100 to be detected below through the first light through hole 44 of the bowl light source 4 vertically downward.
The bowl light source 4 is located the below of half mirror 2, and bowl light source 4 includes first annular mount pad 41, bowl shape reflector 43 and at least three first luminous subassembly 42, and wherein, the bottom of bowl shape reflector 43 is installed on the up end of first annular mount pad 41, and at least three first luminous subassembly 42 evenly set up in the inboard of first annular mount pad 41 along circumference equidistance, and bowl shape reflector 43 is used for the light that each first luminous subassembly sent downwards to object 100 from different angles.
The low-angle annular light source 5 is arranged below the bowl light source 4, the low-angle annular light source 5 comprises a second annular mounting seat 51 and an annular light-emitting component 52, the second annular mounting seat 51 and the first annular mounting seat 41 are coaxially arranged, the annular light-emitting component 52 is arranged on the inner side of the second annular mounting seat 51, and the annular light-emitting component 52 irradiates light on the target object 100 from the periphery at a preset angle.
The reflected light reflected by the target object 100 reaches the half mirror 2 along the central axis of the bowl light source 4, and is transmitted into the camera 1 through the half mirror 2.
According to the optical detection device, the coaxial light source 3 and the low-angle annular light source 5 are adopted to irradiate the target object 100, wherein coaxial light emitted by the coaxial light source 3 vertically irradiates the target object 100 downwards, the low-angle annular light source 5 irradiates the target object 100 from the periphery, so that the omnibearing irradiation of the target object 100 can be realized, the peripheral outline of the target object is highlighted, and the illumination intensity of the surface of the target object is improved.
The bowl light source 4 is used as a main detection light source, which can perform zoned irradiation on the target object from multiple directions through at least three first light emitting assemblies 42 on the bowl light source, so that the camera 1 obtains images of the target object 100 from multiple directions to perform surface defect detection on the target object 100.
For example, in some embodiments, the number of the first light emitting assemblies 42 is 4, and by controlling the 4 first light emitting assemblies to rotate to the light emitting state according to a predetermined rule, the images of the target object 100 can be obtained from 4 directions, that is, the images of the target object 100 in 4 different directions can be obtained. The defects on the surface of the target object 100 can be highlighted by processing and analyzing the images of the target object 100 in 4 different directions by adopting a machine vision algorithm commonly used in the field such as a photometric stereo method, so as to finish the defect detection on the surface of the target object 100. The specific detection principle and detection process of the photometric stereo method for the surface defects of the object are well known to those skilled in the art, and in addition, the detection principle and detection process are not the objects to be protected, so the present utility model will not be described in detail for the sake of brevity.
Of course, in other embodiments, 8 first light emitting elements 42 may be used, and accordingly, 8 or other images of the target object 100 in different directions may be obtained during the detection process.
It can be seen that the illumination intensity of each position to be detected on the surface of the target object 100 is enhanced by the omnidirectional illumination of the coaxial light source 3 and the low-angle ring light source 5, and the target object 100 is subjected to the zonal illumination by the control bowl light source 4, so that the camera 1 can obtain the image of the target object 100 from multiple directions, and finally the surface defect detection of the target object can be performed.
The brightness of the on-axis light source 3 and the bowl light source may be the same or different.
Compared with the existing method for implementing the partition irradiation on the target object by simply adopting the annular partition light source, the method can greatly improve the irradiation brightness of the target object, thereby improving the surface defect detection precision of the target object.
Since the coaxial light source 3 and the low-angle ring light source 5 function to enhance the illumination intensity to the target object 100, the coaxial light source 3 and the low-angle ring light source 5 are optionally kept in a light-emitting state in order to make the detection process simpler.
Each first light emitting component 42 of the bowl light source 4 is rotated to a light emitting state according to a predetermined rule, for example, at the same time, only one first light emitting component 42 is controlled to be switched to a light emitting state, and the other first light emitting components 42 are switched to a light off state, so that an image of a target object in one direction can be obtained. Of course, in order to improve the detection efficiency, at the same time, two non-adjacent first light emitting assemblies 42 can be controlled to be simultaneously switched to the light emitting state, so that images of the target object in two different directions can be obtained. In a specific embodiment, the rotation lighting rule of each first lighting assembly 42 may be adjusted according to actual needs.
As shown in fig. 1 and 3, optionally, the first light through hole 44 is formed at the top center of the bowl-shaped reflecting cover 43 and is located directly below the half mirror 2. In this way, it is ensured that the coaxial light can be vertically projected onto the target object 100 through the first light through hole 44. The reflected light reflected from the target object 100 reaches the half mirror 2 through the first light through hole 44.
As shown in fig. 2, optionally, the half mirror 2 and the coaxial light source 3 are packaged in the same square mounting housing 7, wherein: the top of the square-shaped mounting case 7 is provided with a second light through hole (not shown in the figure) through which the reflected light passes. The half mirror 2 is located below the second light through hole, and the coaxial light source 3 is mounted on one side inner wall of the square mounting housing 7.
Through encapsulating half mirror 2 and coaxial light source 3 in the same square installation casing, can ensure the stability of the mounted position of half mirror 2 and coaxial light source 3, finally ensure half mirror 2 can throw the horizontal light that coaxial light source 3 sent along vertical direction accurately on the object 100 of below. By providing the second light through hole at the top of the square mounting case 7, it is ensured that the reflected light reflected by the target object 100 can be reflected into the camera 1.
Optionally, a lens increasing element is disposed at the second light through hole.
Alternatively, in order to ensure that the low-angle ring light source 5 can irradiate the target object from the periphery, the included angle between the light emitting direction of the ring light emitting assembly 52 and the horizontal plane is 0 ° -60 °, and the ring light emitting assembly 52 emits light obliquely downward toward the periphery of the target object. The annular light emitting assembly 52 may be a continuously emitting annular lamp or may be formed of a plurality of lamp beads circumferentially mounted on the second annular mount 51.
Alternatively, in order to ensure that the target object as a whole 100 is within the irradiation range of the bowl light source 4, the distance between the bowl light source 4 and the target object 100 is set to 80-90mm, while the distance between the bowl light source 4 and the target object 100 is configured to be adjustable.
With continued reference to fig. 1, optionally, the optical detection device in an embodiment of the present utility model further includes a stiffening ring light source 6 disposed between the bowl light source 4 and the low angle ring light source 5, wherein: the reinforced annular light source 6 comprises a third annular mounting seat 61 and a second light-emitting component 62, the third annular mounting seat 61 and the first annular mounting seat 41 are coaxially arranged, and the second light-emitting component 62 is arranged on the inner side of the third annular mounting seat 61 and is used for supplementing light to the bowl light source 4, so that the surface defect detection precision of the utility model is improved. Optionally, the angle between the light emitting direction of the second light emitting component 62 and the horizontal plane is 45 °.
Optionally, the number of the second light emitting assemblies 62 is at least three, which is equal to that of the first light emitting assemblies 42, the second light emitting assemblies 62 are uniformly arranged at equal intervals on the inner side of the third annular mounting seat and are in one-to-one correspondence with the first light emitting assemblies 42, and each second light emitting assembly 62 is used for implementing light supplementing for the corresponding first light emitting assembly 42. In the detection process, the rotation lighting rule of the second lighting component 62 is consistent with the rotation lighting rule of the first lighting component 42, and when a certain first lighting component 42 is switched to a lighting state, the corresponding second lighting component 62 is synchronously switched to the lighting state. In this way, the definition of the image of the target object 100 in each direction acquired by the camera 1 is further improved, and finally the surface defect detection accuracy of the present utility model is further improved.
Of course, the second light emitting component 62 may also be a continuously emitting ring lamp, which remains in a light emitting state during detection. The second light emitting component 62 may further comprise a plurality of light beads circumferentially mounted on the third annular mounting seat 61, wherein the light beads emit light horizontally in a diffuse scattering manner, and all the light beads maintain a light emitting state during the detection process.
The utility model has been described above in sufficient detail with a certain degree of particularity. It will be appreciated by those of ordinary skill in the art that the descriptions of the embodiments are merely exemplary and that all changes that come within the true spirit and scope of the utility model are desired to be protected. The scope of the utility model is indicated by the appended claims rather than by the foregoing description of the embodiments. Moreover, the embodiments mentioned in the present utility model are not only implemented individually, but some embodiments can also be implemented in combination.
Claims (10)
1. An optical detection device, characterized in that, the optical detection device includes camera, semi-transparent half mirror, coaxial light source, bowl light source and low angle ring light source, wherein:
the half-mirror is obliquely arranged at a forty-five degree angle, and the camera is arranged above the half-mirror;
the coaxial light source is positioned at the side of the half-mirror, and the half-mirror is used for reflecting the horizontal light rays emitted by the coaxial light source into vertical downward coaxial light rays, so that the coaxial light rays vertically downward project to a target object to be detected below through the first light through hole of the bowl light source;
the bowl light source is positioned below the semi-transparent and semi-reflective mirror and comprises a first annular mounting seat, a bowl-shaped reflecting cover and at least three first light-emitting components, wherein the bottom of the bowl-shaped reflecting cover is mounted on the upper end face of the first annular mounting seat, the at least three first light-emitting components are uniformly arranged on the inner side of the first annular mounting seat at equal intervals along the circumferential direction, and the bowl-shaped reflecting cover is used for reflecting light rays emitted by each first light-emitting component downwards from different angles onto the target object;
the low-angle annular light source is arranged below the bowl light source and comprises a second annular mounting seat and an annular light-emitting component, the second annular mounting seat and the first annular mounting seat are coaxially arranged, the annular light-emitting component is arranged on the inner side of the second annular mounting seat, and the annular light-emitting component irradiates light on the target object from the periphery at a preset angle;
the reflected light reflected by the target object reaches the half-mirror along the central axis of the bowl light source and is transmitted into the camera through the half-mirror.
2. The optical detection device of claim 1, wherein the first light through hole is open at a top center of the bowl-shaped reflecting cover;
the coaxial light is vertically projected onto the target object through the first light through hole;
the reflected light reaches the half-mirror through the first light through hole.
3. The optical detection device of claim 1, wherein the half mirror and the coaxial light source are packaged in a same square mounting housing, wherein:
the top of the square installation shell is provided with a second light through hole for the reflected light to pass through;
the semi-transparent semi-reflecting mirror is located below the second light through hole, and the coaxial light source is mounted on the inner wall of one side of the square mounting shell.
4. The optical detection device of claim 1 wherein the brightness of the on-axis light source is consistent with the brightness of the bowl light source.
5. The optical detection device of claim 1, wherein the number of first light emitting elements is 4 or 8.
6. The optical detection device of claim 1, further comprising a stiffening ring light source disposed between the bowl light source and the low angle ring light source, wherein:
the reinforced annular light source comprises a third annular mounting seat and a second light-emitting component, the third annular mounting seat and the first annular mounting seat are coaxially arranged, and the second light-emitting component is arranged on the inner side of the third annular mounting seat and is used for supplementing light to the bowl light source.
7. The optical detection device according to claim 6, wherein the number of the second light emitting components is at least three, the at least three second light emitting components are arranged in one-to-one correspondence with the first light emitting components and are equally arranged on the inner side of the third annular mounting seat, and each second light emitting component is used for supplementing light for the corresponding first light emitting component.
8. The optical inspection device of claim 1, wherein during inspection, said annular light emitting assemblies of said coaxial light source and said low angle annular light source remain illuminated, and each of said first light emitting assemblies of said bowl light source is rotated to an illuminated state according to a predetermined rule.
9. The optical detection device of claim 1, wherein the angle between the light emission direction of the annular light emitting assembly and the horizontal is 0 ° -60 °.
10. The optical detection device of claim 1, wherein the bowl light source is spaced from the target object by a distance of 80-90mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321562903.XU CN220188390U (en) | 2023-06-19 | 2023-06-19 | Optical detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321562903.XU CN220188390U (en) | 2023-06-19 | 2023-06-19 | Optical detection device |
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| Publication Number | Publication Date |
|---|---|
| CN220188390U true CN220188390U (en) | 2023-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321562903.XU Active CN220188390U (en) | 2023-06-19 | 2023-06-19 | Optical detection device |
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|---|---|
| CN (1) | CN220188390U (en) |
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2023
- 2023-06-19 CN CN202321562903.XU patent/CN220188390U/en active Active
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