CN211526103U - Visual light source and machine vision system - Google Patents
Visual light source and machine vision system Download PDFInfo
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- CN211526103U CN211526103U CN201921610104.9U CN201921610104U CN211526103U CN 211526103 U CN211526103 U CN 211526103U CN 201921610104 U CN201921610104 U CN 201921610104U CN 211526103 U CN211526103 U CN 211526103U
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Abstract
The embodiment of the utility model discloses a visual light source and a machine vision system, which comprises a shell, a circuit board, a diffusion plate and a light-emitting element, wherein the shell is provided with a first opening, a second opening and a holding cavity, and the first opening and the second opening are coaxially arranged and are mutually communicated with the holding cavity; the circuit board is arranged in the accommodating cavity and comprises a first circuit board and a second circuit board, the first circuit board and the second circuit board are connected in a preset angle, the first circuit board is arranged facing to the surface where the first opening is located, and the second circuit board is far away from the first opening compared with the first circuit board; the diffusion plate is arranged at the opening edge of the second opening and is opposite to the second circuit board; the light-emitting elements are electrically connected with the circuit board, and the plurality of light-emitting elements are distributed on the first circuit board and the second circuit board; the first circuit board and the second circuit board are respectively used for controlling the light-emitting elements connected with the first circuit board to emit light rays in a preset direction. Through the arrangement, the lighting effect of the visual light source can be improved, and the higher lighting requirement is met.
Description
Technical Field
The utility model relates to a visual lighting technology field especially relates to and is used for a visual light source and machine vision system.
Background
With the increasingly strict requirements of the market on the visual ability of industrial machines, the requirements on the detection rate of defective products are higher and higher, and the false detection rate in the production process needs to be controlled, so that the requirements on the quality of images shot by a camera are very high.
The traditional visual light source for illumination is completed by a standard light source, such as a ring light source and a spherical integral light source, but when the standard light source is used for illuminating an object to be detected, the problems of uneven brightness, dark rings or light reflection and the like often occur, and the higher illumination requirements cannot be met.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the embodiment of the utility model provides a can improve the visual light source and the machine vision system of illuminating effect.
The embodiment of the utility model provides a solve its technical problem and adopt following technical scheme:
there is provided a visual light source comprising:
the shell is provided with a first opening, a second opening and an accommodating cavity, and the first opening and the second opening are coaxially arranged and are communicated with the accommodating cavity;
the circuit board is arranged in the accommodating cavity and comprises a first circuit board and a second circuit board, the first circuit board and the second circuit board are connected at a preset angle, the first circuit board is arranged facing to the surface where the first opening is located, and the second circuit board is far away from the first opening compared with the first circuit board;
a diffusion plate mounted on an opening edge of the second opening and opposite to the second circuit board;
the light-emitting elements are arranged on the circuit board and electrically connected with the circuit board, and a plurality of light-emitting elements are distributed on the first circuit board and the second circuit board; wherein the content of the first and second substances,
the first circuit board and the second circuit board are respectively used for controlling the light-emitting elements connected with the first circuit board to emit light rays in a preset direction.
In some embodiments, the plurality of light emitting elements are distributed on the first circuit board and the second circuit board in a ring shape, and a center of each ring of the light emitting elements is coincident with a central axis formed by connecting centers of the first opening and the second opening.
In some embodiments, the light emitting elements have a diameter of 4 mm, and the distance between two adjacent light emitting elements in each turn is 5.3 mm.
In some embodiments, the first opening is circular in shape, and the first opening has a bore diameter less than or equal to 12 millimeters.
In some embodiments, the housing includes a top plate having a flat plate structure, and the first opening is located in the top plate.
In some embodiments, the first circuit board is disposed parallel to the top plate, and the second circuit board and the diffusion plate are both disposed perpendicular to the first circuit board.
In some embodiments, a heat dissipation cavity is disposed between the housing and the second circuit board, and the housing is provided with a heat dissipation hole communicated with the heat dissipation cavity.
In some embodiments, the inner wall of the housing is provided with a nano light reflecting material.
In some embodiments, the light emitting element is an LED lamp bead.
On the other hand, the embodiment of the utility model provides a still provide a machine vision system, its characterized in that, including foretell visual light source.
Compared with the prior art, the embodiment of the utility model provides a circuit board of visual light source includes first circuit board and second circuit board, first circuit board and second circuit board are the connection of predetermineeing the angle, first circuit board sets up towards the one side at first opening place, the second circuit board is far away from first opening than first circuit board, light-emitting component is connected with the circuit board electricity, a plurality of light-emitting component distribute in first circuit board and second circuit board, make the light-emitting component who connects respectively with first circuit board and second circuit board can send light to different directions, in order to improve the illuminating effect; and the visual light source is also provided with a diffusion plate opposite to the second circuit board, so that the light-emitting elements on the second circuit board can be subjected to diffuse reflection through the diffusion plate, the illumination effect is further improved, and the higher illumination requirement is met. The visual light source provided by the embodiment can be suitable for different detection lighting occasions.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.
Fig. 1 is a perspective view of a visual light source according to an embodiment of the present invention;
fig. 2 is a cross-sectional view of a visual light source according to an embodiment of the present invention;
fig. 3 is an exploded view of a visual light source according to an embodiment of the present invention;
fig. 4 is a schematic view of a machine vision system according to another embodiment of the present invention.
Detailed Description
In order to facilitate an understanding of the invention, the invention is described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. As used in this specification, the terms "upper," "lower," "inner," "outer," "vertical," "horizontal," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must be in a particular orientation, constructed and operated in a particular orientation, and are not to be considered limiting of the invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
Referring to fig. 1-2, a visual light source 10 according to an embodiment of the present invention is used for illuminating a to-be-detected object 101, where the to-be-detected object 101 may be a rubber seal ring or the like. The visual light source 10 includes a housing 11, a circuit board 12, a diffusion plate 13, and light emitting elements (not shown), wherein the circuit board 12, the diffusion plate 13, and the light emitting elements are all disposed inside the housing 11, the housing 11 is substantially a hollow structure with two ends communicated, a plurality of light emitting elements are distributed on the circuit board 12 and are all electrically connected to the circuit board 12, the circuit board 12 is configured to control the light emitting elements to emit illumination light, the diffusion plate 13 is disposed opposite to a portion of the light emitting elements, wherein the illumination light emitted by one portion of the light emitting elements can be reflected out of the housing 11 through an inner wall of the housing 11, and the illumination light emitted by another portion of the light emitting elements is diffused out of the housing 11 through the diffusion plate 13 to illuminate the object 101 to be detected.
The visual light source 10 of this embodiment can regard as the visual detection special light source of rubber seal and similar product appearance, camera 20 accessible visual light source 10 makes a video recording to rubber seal, in order to improve rubber seal imaging quality, the visual light source 10 of this embodiment can improve the not enough that traditional sealing washer visual detection exists, can also control the false drop rate in the production process when improving the defective products detectable rate, reduce the loss, improve production efficiency, and promote enterprise competitiveness. The visual light source 10 of the present embodiment can be widely applied to illumination occasions such as sealing ring manufacturing enterprises, building material hardware, automobiles and the like.
Referring to fig. 2 and 3, the housing 11 is cylindrical and has a receiving cavity 1101, and the receiving cavity 1101 is used for receiving the circuit board 12, the diffusion plate 13 and the light emitting element. The housing 11 includes a top plate 111, a bottom plate 112, and a side plate 113, wherein the top plate 111 and the bottom plate 112 are both annular flat plates, and the side plate 113 is a thin-walled cylinder with two ends penetrating through. The top plate 111 and the bottom plate 112 are respectively mounted to both ends of the side plate 113, thereby forming an accommodating chamber 1101 inside the housing 11. The top plate 111 and the side plate 113 may be an integrally formed structure, and the bottom plate 112 may be detachably mounted on the side plate 113 through screws, specifically, the circuit board 12, the diffusion plate 13, the light emitting element and the bottom plate 112 may be assembled first, and then the bottom plate 112 is fixed to the side plate 113, so as to facilitate assembly of the whole visual light source 10.
It can be understood that the top plate 111 is configured to be a flat plate, when part of the light emitting elements emit light to the top plate 111, uniform light parallel to the optical axis direction can be increased, and because the object 101 to be detected is not completely specular-reflected, dark annular spots at the imaging center of the object 101 to be detected can be effectively reduced.
In some embodiments, a nanometer reflective material (not shown) is disposed on the inner wall of the housing 11, and by using the characteristics of the nanometer reflective material that the absorbance is extremely low and the surface of the nanometer particles is uniform, the inner wall of the housing 11 can efficiently and uniformly scatter the light with strong directional sense into uniform reflected light, so as to improve the reflective uniformity of the inner wall of the housing 11, and the light-emitting element can uniformly illuminate the curved surface of the to-be-detected object 101, so that the camera 20 can capture the uniform reflected light, thereby improving the imaging quality of the to-be-detected object 101. Meanwhile, the nanometer reflective material has acid resistance and heat resistance, and can prolong the service life of the visual light source 10.
In some other embodiments, the housing 11 may also be a structure with other shapes, such as a hemispherical structure, a rectangular parallelepiped structure, etc., wherein when the housing 11 is a hemispherical structure, the first opening 1102 is disposed at the top of the hemisphere, and the top of the hemisphere is a flat plate.
The top plate 111 is provided with a first opening 1102, the bottom plate 112 is provided with a second opening 1103, the first opening 1102 and the second opening 1103 are both communicated with the accommodating cavity 1101, the first opening 1102 is used as a viewing window to allow the camera 20 to take images through the first opening 1102, and the second opening 1103 is used to allow the illumination light emitted by the light emitting element to be reflected out of the housing 11. In a specific embodiment, the camera 20 can shoot the object 101 to be detected within the illumination range of the visual light source 10 through the angle of view formed by the first opening 1102 and the second opening 1103.
Preferably, the first opening 1102 and the second opening 1103 are both circular, the first opening 1102 and the second opening 1103 are coaxially disposed, that is, a central axis of the first opening 1102 is overlapped with a central axis of the second opening 1103, and an aperture of the first opening 1102 is smaller than that of the second opening 1103.
In some embodiments, the first opening 1102 has an aperture diameter of less than or equal to 12 millimeters. It can be understood that when a part of the light emitting elements emit light toward the top plate 111 due to the first opening 1102, the top plate 111 can reflect the light to different directions, but the opening part of the top plate 111 has no reflection capability, so that the top plate 111 has an objective non-reflective area, thereby causing a dark annular spot to appear at the imaging center of the object 101 to be detected. In this embodiment, by controlling the aperture of the first opening 1102 in the range of 12 mm and increasing the distance between the visual light source 10 and the object 101 to be detected in the implementation process, the dark annular spot at the imaging center of the object 101 to be detected can be effectively reduced. Wherein, by setting the top plate 111 to be flat plate-shaped and setting the aperture of the first opening 1102 within a range of 12 mm, dark annular spots at the imaging center of the object 101 to be detected can be substantially eliminated.
The inner wall of the side plate 113 is provided with a step surface (not shown) near the bottom plate 112, the step surface is arranged along the circumferential direction of the inner wall of the side plate 113, wherein the wall thickness of the part from the step surface to the top plate 111 is greater than that of the part from the step surface to the bottom plate 112.
Referring to fig. 2 and fig. 3, the circuit board 12 is disposed in the accommodating cavity 1101 and includes a first circuit board 121 and a second circuit board 122, the first circuit board 121 is connected to the second circuit board 122 at a predetermined angle, the first circuit board 121 faces the top plate 111, and the second circuit board 122 is farther from the first opening 1102 than the first circuit board 121. The plurality of light emitting elements are distributed on the first circuit board 121 and the second circuit board 122, and the first circuit board 121 and the second circuit board 122 are respectively used for controlling the light emitting elements connected thereto to emit light in a preset direction. The first circuit board 121 can control the light emitting elements connected thereto to emit light toward the top plate 111, and the second circuit board 122 can control the light emitting elements connected thereto to emit light toward the diffusion plate 13.
In some embodiments, the first circuit board 121 is a ring-shaped flat plate, and the second circuit board 122 is a thin-walled ring. The first circuit board 121 is disposed parallel to the top plate 111, the second circuit board 122 is disposed perpendicular to the first circuit board 121, one end of the second circuit board 122 is fixedly connected to a surface of the first circuit board 121 departing from the top plate 111, and the other end of the second circuit board 122 is fixedly connected to the bottom plate 112. The outer ring edge of the first circuit board 121 abuts against the step surface of the side plate 113, so that the first circuit board 121 and the second circuit board 122 are fixed between the step surface and the bottom plate 13.
In some other embodiments, the second circuit board 122 may have other shapes and structures, such as a thin-walled cone, so that the second circuit board 122 can form an inclined angle when being fixedly connected to the first circuit board 121, so as to change the direction of the light emitted by the light emitting element connected to the second circuit board 122.
The diffusion plate 13 is disposed in the receiving cavity 1101, is mounted on an edge of the second opening 1103 of the base plate 112, and is disposed opposite to the second circuit board 122.
In some embodiments, the diffusion plate 13 is a thin-walled ring, one end of the diffusion plate 13 is connected to the inner circumference edge of the first circuit board 121, the other end of the diffusion plate 13 is connected to the opening edge of the second opening 1103 of the base plate 112, and the diffusion plate 13 is disposed perpendicular to the first circuit board 121, that is, the diffusion plate 13 is disposed axially parallel to the second circuit board 122, that is, the outer wall of the diffusion plate 13 is opposite to the inner wall of the second circuit board 122.
In some embodiments, the first opening 1102 is located in the middle of the top plate 111, the second opening 1103 is located in the middle of the bottom plate 112, and the central axes of the first opening 1102, the second opening 1103, the first circuit board 121, the second circuit board 122, and the diffusion plate 13 are all coincidently disposed.
The second circuit board 122 and the inner wall of the portion from the step surface to the bottom plate 112 form a heat dissipation cavity 1104, and the side wall of the portion from the step surface to the bottom plate 112 is provided with a plurality of heat dissipation holes (not shown) communicated with the heat dissipation cavity 1104, so as to allow heat generated by the light emitting element to be discharged outwards and avoid heat accumulation in the accommodating cavity 1101.
The light emitting elements include a first light emitting element (not shown) connected to the first circuit board 121 for emitting light toward the top plate 111 and a second light emitting element (not shown) connected to the second circuit board 122 for emitting light toward the diffusion plate 13. Wherein, the light emitted by the second light emitting element is diffused and reflected by the diffusion plate 13.
Specifically, a first light emitting element is mounted on a surface of the first circuit board 121 facing the top plate 111, and a second light emitting element is mounted on a surface of the second circuit board 122 opposite to the diffusion plate 13, that is, the first light emitting element is mounted on an upper surface of the first circuit board 121, and the second light emitting element is mounted on an inner wall of the second circuit board 122.
In some embodiments, the first light emitting elements are distributed on the first circuit board 121 in a circle shape, the second light emitting elements are distributed on the second circuit board 122 in a circle shape, and the centers of the first light emitting elements and the second light emitting elements in each circle are all overlapped with the central axis. The circle centers of the first circles of light-emitting elements are overlapped, and the circle centers of the second circles of light-emitting elements are arranged at intervals along the length direction of the central axis.
The diffusion plate 13 can improve the directivity of the light emitted by the second light emitting element, so that the illumination of the second light emitting element is softer and more uniform. After the light emitted by the second light-emitting element is acted by the diffusion plate 13, the light can become a diffused light source, so that a better diffusion effect is provided, a uniform and stable diffused light irradiation area is obtained, and the imaging quality of the to-be-detected object 101 is improved. In a specific implementation mode, the diffusion plate 13 can effectively supplement light to the inner edge and the outer edge of the sealing ring, and the effective detection area of the product is greatly increased.
Further, in order to improve the heat dissipation effect of the light emitting elements, the distance between two adjacent light emitting elements in each circle of light emitting elements is 5.3 mm, so that the heat dissipation of the light emitting elements is facilitated.
In order to ensure the brightness and the service life of the light-emitting element, the diameter of the light-emitting element is preferably 4 mm.
Referring to fig. 4, in another aspect, the present invention further provides a machine vision system 100, wherein the machine vision system 100 includes a control device (not shown), the above-mentioned vision light source 10 and the camera 20. The control device is connected with the visual light source 10, the control device is used for controlling the displacement and the angle of the visual light source 10, the visual light source 10 is used for illuminating the piece to be detected 101, and the camera 20 is used for shooting the piece to be detected 101.
It should be noted that the preferred embodiments of the present invention are described in the specification and the drawings, but the present invention can be realized in many different forms, and is not limited to the embodiments described in the specification, and these embodiments are not provided as additional limitations to the present invention, and are provided for the purpose of making the understanding of the disclosure of the present invention more thorough and complete. Moreover, the above features are combined with each other to form various embodiments not listed above, and all of them are considered as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A visual light source, comprising:
the shell is provided with a first opening, a second opening and an accommodating cavity, and the first opening and the second opening are coaxially arranged and are communicated with the accommodating cavity;
the circuit board is arranged in the accommodating cavity and comprises a first circuit board and a second circuit board, the first circuit board and the second circuit board are connected at a preset angle, the first circuit board is arranged facing to the surface where the first opening is located, and the second circuit board is far away from the first opening compared with the first circuit board;
a diffusion plate mounted on an opening edge of the second opening and opposite to the second circuit board;
the light-emitting elements are arranged on the circuit board and electrically connected with the circuit board, and a plurality of light-emitting elements are distributed on the first circuit board and the second circuit board; wherein the content of the first and second substances,
the first circuit board and the second circuit board are respectively used for controlling the light-emitting elements connected with the first circuit board to emit light rays in a preset direction.
2. The visual light source of claim 1,
the plurality of light-emitting elements are distributed on the first circuit board and the second circuit board in a ring shape, and the circle center of each ring of light-emitting elements is superposed with the central axis formed by connecting the centers of the first opening and the second opening.
3. The visual light source of claim 2,
the diameter of the light-emitting elements is 4 mm, and the distance between every two adjacent light-emitting elements in each circle of the light-emitting elements is 5.3 mm.
4. The visual light source of claim 1,
the first opening is circular, and the aperture of the first opening is smaller than or equal to 12 millimeters.
5. The visual light source of claim 1,
the shell comprises a top plate, the top plate is of a flat plate structure, and the first opening is located in the top plate.
6. The visual light source of claim 5,
the first circuit board and the top plate are arranged in parallel, and the second circuit board and the diffusion plate are both arranged perpendicular to the first circuit board.
7. The visual light source of claim 6,
the casing with be provided with the heat dissipation chamber between the second circuit board, the casing be provided with the louvre in heat dissipation chamber intercommunication.
8. The visual light source of claim 1,
the inner wall of the shell is provided with a nanometer reflective material.
9. The visual light source of claim 1,
the light-emitting element is an LED lamp bead.
10. A machine vision system comprising a visual light source according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921610104.9U CN211526103U (en) | 2019-09-25 | 2019-09-25 | Visual light source and machine vision system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921610104.9U CN211526103U (en) | 2019-09-25 | 2019-09-25 | Visual light source and machine vision system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211526103U true CN211526103U (en) | 2020-09-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921610104.9U Active CN211526103U (en) | 2019-09-25 | 2019-09-25 | Visual light source and machine vision system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211526103U (en) |
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2019
- 2019-09-25 CN CN201921610104.9U patent/CN211526103U/en active Active
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