CN218974155U

CN218974155U - Defect detection device

Info

Publication number: CN218974155U
Application number: CN202223324358.9U
Authority: CN
Inventors: 周杰
Original assignee: Guangdong OPT Machine Vision Co Ltd
Current assignee: Guangdong OPT Machine Vision Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-05-05
Anticipated expiration: 2032-12-12

Abstract

The utility model relates to the technical field of optical detection, and discloses a defect detection device which comprises a first light-emitting component; the first light emitting component comprises a first light source and a first inclined grating for deflecting the emergent direction of light rays, and the first inclined grating is arranged on the emergent side of the first light source; the first inclined grating comprises a first transparent substrate and a plurality of first strip-shaped structures arranged on the first transparent substrate in a arrayed manner; the first strip-shaped structure is provided with a first inclined reflecting surface for deflecting the emergent direction of light rays, and a plurality of first inclined reflecting surfaces are mutually parallel. The defect detection device in the embodiment can avoid the condition that the detection camera influences light, and is beneficial to improving the detection precision.

Description

Defect detection device

Technical Field

The utility model relates to the technical field of optical detection, in particular to a defect detection device.

Background

The current defect detection device comprises a light source, wherein light rays emitted by the light source vertically irradiate to the surface of a product to be detected, so that the surface defect of the product to be detected can be well displayed.

In the prior art, when defect detection is performed, a light source is positioned right above a product to be detected, and light rays emitted by the light source are perpendicular to the surface of the product to be detected. At this time, the detection camera is generally installed in front of the light source near the product to be detected or in back of the product to be detected, and when the detection camera is installed in front of the light source, light is easily blocked to reduce detection accuracy; when the detection camera is installed behind the light source, a detection opening is required to be formed in the light source, so that the situation of insufficient local illumination is easy to form, and the actual detection accuracy is likely to be affected.

In view of this, a defect detecting device is designed to solve the problem that detecting camera mounting positions are prone to interference detection accuracy.

Disclosure of Invention

The utility model aims to provide a defect detection device which is used for solving the problem that the installation position of a detection camera is easy to interfere with the detection precision.

To achieve the purpose, the utility model adopts the following technical scheme:

a defect detection device comprises a first light emitting component;

the first light emitting component comprises a first light source and a first inclined grating for deflecting the emergent direction of light rays, and the first inclined grating is arranged on the emergent side of the first light source;

the first inclined grating comprises a first transparent substrate and a plurality of first strip-shaped structures arranged on the first transparent substrate in a arrayed manner; the first strip-shaped structure is provided with a first inclined reflecting surface for deflecting the emergent direction of light rays, and a plurality of first inclined reflecting surfaces are mutually parallel.

Optionally, the first light component further comprises a first cylindrical light focusing rod;

the first cylindrical light gathering rod is arranged between the first light source and the first inclined grating, and the first light source and the first inclined grating are parallel to the axis of the first cylindrical light gathering rod.

Optionally, the first light source is a strip-shaped light panel.

Optionally, the strip lamp panel includes circuit board and sets up a plurality of lamp pearls on the circuit board.

Optionally, the device further comprises a second polishing component, wherein the second polishing component comprises a second light source and a second inclined grating;

the light emergent paths of the first light polishing component and the second light polishing component are intersected, and a gap for a detection camera to detect a product to be detected is arranged between the first light polishing component and the second light polishing component.

Optionally, the first light source and the second light source are symmetrically arranged about a preset symmetry plane.

Optionally, the second inclined grating includes a second transparent substrate and a plurality of second stripe structures arranged on the second transparent substrate, where the second stripe structures have a second inclined reflecting surface;

the first inclined reflecting surface faces a first direction, the second inclined reflecting surface faces a second direction, and the first direction is not parallel to the second direction.

Optionally, the second inclined grating has a second inclined reflecting surface;

the first inclined reflecting surface is used for deflecting light rays to a first end of a product to be detected, and the second inclined reflecting surface is used for deflecting light rays to a second end, far away from the first end, of the product to be detected.

Optionally, the device further comprises a conveying device for conveying the product to be detected, wherein the conveying direction of the conveying device is perpendicular to the axis of the first cylindrical light gathering rod;

the conveying surface of the conveying device is parallel to the horizontal plane.

Optionally, the cross section of the first strip-shaped structure in the direction perpendicular to the axis of the first cylindrical light focusing rod is a right trapezoid.

Compared with the prior art, the utility model has the following beneficial effects:

in this embodiment, the first inclined grating deflects the light of the first light source, so that the installation position of the first light-emitting component can be installed on one side of the product to be detected instead of right above the product to be detected, the selectivity of the installation position of the first light-emitting component is larger, and the situation that the detection accuracy is reduced due to the fact that the detection camera is arranged in front of or behind the light source is effectively avoided.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are therefore not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, which would otherwise be used by those skilled in the art, would not have the essential significance of the present disclosure, would still fall within the scope of the present disclosure without affecting the efficacy or achievement of the present disclosure.

FIG. 1 is a schematic diagram of an installation structure of a defect detecting device according to an embodiment of the present utility model;

FIG. 2 is a schematic side view of a defect detecting apparatus according to an embodiment of the present utility model;

FIG. 3 is a schematic perspective view of a defect detecting device according to an embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of the position A in FIG. 3;

fig. 5 is an enlarged schematic view of the position B in fig. 3.

Illustration of: 1. a first light assembly; 11. a first light source; 12. a first tilted grating; 121. a first transparent substrate; 122, a bar-shaped structure; 123. a first inclined reflecting surface; 13. a first cylindrical light-gathering rod; 2. a second polishing component; 21. a second light source; 22. a second tilted grating; 221. a second transparent substrate; 222. a second bar-shaped structure; 223. a second inclined reflecting surface; 3. a gap; 100. a symmetry plane is preset.

Detailed Description

In order to make the objects, features and advantages of the present utility model more comprehensible, the technical solutions in the embodiments of the present utility model are described in detail below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. It is noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

The embodiment of the utility model provides a defect detection device, wherein when detection is carried out, a first light-emitting component 1 is positioned at one side of a product to be detected, and the defect detection device can not form an obstacle to the installation of a detection camera, and the installation of the detection camera can not influence actual illumination light, so that the defect detection precision is improved.

Referring to fig. 1 to 5, the defect detecting device includes a first light emitting device 1.

The first light-emitting component 1 comprises a first light source 11 and a first inclined grating 12 for deflecting the emergent direction of light rays, and the first inclined grating 12 is arranged on the emergent side of the first light source 11; the light emitted from the first light source 11 is perpendicularly directed to the first inclined grating 12, and then is deflected and obliquely directed to the surface of the product to be inspected by the first inclined grating 12.

The first inclined grating 12 comprises a first transparent substrate 121 and a plurality of first bar-shaped structures 122 arranged on the first transparent substrate 121; the first stripe structure 122 has a first inclined reflecting surface 123 for deflecting the outgoing direction of the light, and several first inclined reflecting surfaces 123 are parallel to each other. Specifically, the light emitted from the first light source 11 is irradiated on the first inclined reflecting surface 123, and then deflected to be obliquely irradiated on the surface of the product, thereby illuminating the product.

Optionally, the first light assembly 1 further comprises a first cylindrical light gathering rod 13; the first cylindrical light-gathering rod 13 is disposed between the first light source 11 and the first inclined grating 12, and the first light source 11 and the first inclined grating 12 are parallel to the axis of the first cylindrical light-gathering rod 13. The first cylindrical light collecting rod 13 can collect light effectively, so that the brightness of the illuminated product of the first light emitting component 1 can be improved.

Optionally, the first light source 11 is a strip-shaped light panel. Or the first light source 11 is a light emitting member in a strip shape.

In a specific embodiment, the strip-shaped lamp panel comprises a circuit board and a plurality of lamp beads arranged on the circuit board. The lamp beads are arranged at intervals in a straight line.

Optionally, the defect detecting device further includes a second polishing component 2, where the second polishing component 2 includes a second light source 21 and a second inclined grating 22; the second inclined grating 22 is used to deflect the light of the second light source 21 so that the light is obliquely irradiated on the surface of the product.

The light-emitting paths of the first light-polishing component 1 and the second light-polishing component 2 are intersected, and a gap 3 for a detection camera to detect a product to be detected is arranged between the first light-polishing component 1 and the second light-polishing component 2.

The detection camera is installed in the gap 3, and the camera lens of the detection camera is vertical to the surface of the product to be detected, and the detection camera shoots under the irradiation of the first light-polishing component 1 and the second light-polishing component 2 to detect the defect of the product to be detected.

Alternatively, the first light source 11 and the second light source 21 are symmetrically arranged about the preset symmetry plane 100. The second inclined grating 22 comprises a second transparent substrate 221 and a plurality of second bar-shaped structures 222 arranged on the second transparent substrate 221, wherein the second bar-shaped structures 222 are provided with second inclined reflecting surfaces 223; the first inclined reflecting surface 123 faces the first direction, the second inclined reflecting surface faces the second direction, and the first direction is not parallel to the second direction, so that the direction of the irradiated light is provided, and defects can be better displayed under the detection camera. As shown in fig. 3, the first lighting assembly 1 and the second lighting assembly 2 illuminate the product to be inspected from both sides, thereby advantageously better revealing defects on the surface of the product.

In a specific embodiment, the second tilted grating 22 has a second tilted reflective surface 223; the first inclined reflecting surface 123 is used for deflecting light toward a first end of the product to be inspected, and the second inclined reflecting surface 223 is used for deflecting light toward a second end of the product to be inspected away from the first end. At this time, the first light component 1 and the second light component 2 cross-illuminate the space from two sides, and the first light component 1 illuminates the left end of the product to be detected under the deflection of the first inclined grating 12, and the second light component 2 illuminates the right end of the product to be detected under the deflection of the second inclined grating 22, which increases the inclination angle of the light, and is beneficial to better displaying scratches parallel to the conveying direction on the product to be detected, thereby being beneficial to improving the detection accuracy.

Optionally, the defect detection device further comprises a conveying device for conveying the product to be detected, and the conveying direction of the conveying device is perpendicular to the axis of the first cylindrical light focusing rod; the conveying surface of the conveying device is parallel to the horizontal plane, at the moment, the emergent light rays of the first light polishing component 1 and the emergent light rays of the second light polishing component 2 are mutually intersected, and the emergent light rays of the first light polishing component 1 and the emergent light rays of the second light polishing component 2 are obliquely irradiated on a product to be detected, so that the surface defect of the product to be detected can be well shot by the detection camera, and the detection precision is effectively improved.

Alternatively, the first bar-shaped structure 122 has a right trapezoid shape in a cross section perpendicular to the axial direction of the first cylindrical condenser rod 13. It should be noted that, the light beam of the first light source 11 that strikes the inclined plane of the right trapezoid will be reflected and deflected, and the portion of the first light source 11 that strikes the top surface of the right trapezoid will not be deflected greatly. At this time, the light vertical to the surface of the product to be detected exists, and the light inclined to the surface of the product to be detected exists, so that the surface defect of the product to be detected can be better displayed.

The above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A defect detection device, characterized by comprising a first lighting assembly (1);

the first light-emitting component (1) comprises a first light source (11) and a first inclined grating (12) for deflecting the emergent direction of light rays, and the first inclined grating (12) is arranged on the emergent side of the first light source (11);

the first inclined grating (12) comprises a first transparent substrate (121) and a plurality of first strip-shaped structures (122) arranged on the first transparent substrate (121); the first strip-shaped structure (122) is provided with a first inclined reflecting surface (123) for deflecting the emergent direction of light rays, and a plurality of the first inclined reflecting surfaces (123) are mutually parallel.

2. The defect detection device according to claim 1, wherein the first lighting assembly (1) further comprises a first cylindrical light collecting rod (13);

the first cylindrical light gathering rod (13) is arranged between the first light source (11) and the first inclined grating (12), and the first light source (11) and the first inclined grating (12) are parallel to the axis of the first cylindrical light gathering rod (13).

3. The defect detection device according to claim 1, wherein the first light source (11) is a bar-shaped light panel.

4. The defect detection apparatus of claim 3, wherein the strip lamp panel comprises a circuit board and a plurality of lamp beads disposed on the circuit board.

5. The defect detection device according to claim 2, further comprising a second lighting assembly (2), the second lighting assembly (2) comprising a second light source (21) and a second tilted grating (22);

the light emitting paths of the first light emitting component (1) and the second light emitting component (2) are intersected, and a gap (3) for a detection camera to detect a product to be detected is arranged between the first light emitting component (1) and the second light emitting component (2).

6. The defect detection device according to claim 5, wherein the first light source (11) and the second light source (21) are symmetrically arranged about a predetermined symmetry plane (100).

7. The defect detection device according to claim 5, wherein the second oblique grating (22) comprises a second transparent substrate (221) and a plurality of second stripe-shaped structures (222) arranged on the second transparent substrate (221), the second stripe-shaped structures (222) having a second oblique reflective surface (223);

the first inclined reflective surface (123) faces a first direction and the second inclined reflective surface faces a second direction, the first direction being non-parallel to the second direction.

8. The defect detection device according to claim 5, wherein the second tilted grating (22) has a second tilted reflective surface (223);

the first inclined reflecting surface (123) is used for deflecting light rays towards a first end of a product to be detected, and the second inclined reflecting surface (223) is used for deflecting light rays towards a second end of the product to be detected, which is far away from the first end.

9. The defect detection device according to claim 2, further comprising a conveying device for conveying the product to be detected, the conveying direction of the conveying device being perpendicular to the axis of the first cylindrical light gathering rod (13);

10. The defect detection device according to claim 2, wherein the first bar-shaped structure (122) has a right trapezoid shape in cross section in a direction perpendicular to the axis of the first cylindrical condenser bar (13).