Visual inspection device

Abstract

The utility model relates to the technical field of visual inspection, and discloses a visual inspection device which comprises a first light source assembly, a second light source assembly and a detection camera, the first light source assembly and the second light source assembly are arranged around a detection station, and the detection camera is located on one side of the top of the detection station; the first light source assembly is obliquely arranged to obliquely and downwards emit light to illuminate the top surface and the top periphery of a workpiece in a detection station; the second light source assembly is arranged on one side of the bottom of the first light source assembly so as to horizontally emit light to the detection station to illuminate the periphery of the workpiece; and a spectroscope group used for reflecting peripheral images of the detected workpiece to a detection camera is obliquely arranged between the detection station and the second light source assembly. The detection device provided by the utility model can better detect the contour condition of the workpiece, and is beneficial to reducing the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of vision detection, in particular to a vision detection device. Background Art

[0002] At present, for a vision detection device used to detect the contour of a workpiece, generally a ring of light sources is arranged around the detection station, and then multiple cameras are distributed in a circumferential array on the outer peripheral side of the detection station to capture the contour of the workpiece to be detected. The existing detection device has the following technical problems. For a workpiece with a larger upper part and a smaller lower part or other irregularly shaped workpieces, it is difficult for the detection device to completely detect the contour of the workpiece, and detection errors are likely to occur, which may lead to defective workpieces flowing into subsequent production. Moreover, the setting of multiple cameras increases the cost of the detection device.

[0003] Therefore, it is necessary to improve the existing technology.

[0004] The above information is given as background information only to assist in understanding the present disclosure, and it is not determined or admitted whether any of the above content can be used as the prior art relative to the present disclosure. Summary of the Utility Model

[0005] The utility model provides a vision detection device, which can better detect the contour of a workpiece.

[0006] To achieve the above object, the utility model provides the following technical solutions:

[0007] A vision detection device includes a first light source assembly, a second light source assembly and a detection camera. Both the first light source assembly and the second light source assembly surround the detection station, and the detection camera is located on one side of the top of the detection station;

[0008] The first light source assembly is inclined to emit light obliquely downward to illuminate the top surface and the outer periphery of the top of the workpiece in the detection station;

[0009] The second light source assembly is arranged on one side of the bottom of the first light source assembly to emit light horizontally to the detection station to illuminate the outer periphery of the workpiece; A spectroscope mirror group for reflecting the outer peripheral image of the workpiece in the detection station to the detection camera is inclined between the detection station and the second light source assembly.

[0010] Optionally, the first light source assembly is an annular light source, including an annular circuit board and first lamp beads arranged on the surface of the annular circuit board close to the detection station, and the annular circuit board is in a horn shape.

[0011] Optionally, the detection device further includes a third light source assembly, which includes a backlight board disposed on one side of the bottom of the detection station and a diffusion board mounted on the light-emitting side of the backlight board, and a parallel film is disposed on the surface of the diffusion board close to the detection station.

[0012] Optionally, the detection device further includes a support member, and the first light source assembly, the second light source assembly, and the third light source assembly are all mounted on the support member.

[0013] Optionally, the support member is in a barrel shape and includes a bottom wall and an annular side wall;

[0014] The first light source assembly and the second light source assembly are both mounted on the annular side wall, and the third light source assembly is mounted on the bottom wall.

[0015] Optionally, an absorbing plate is disposed at the bottom of the beam splitter mirror group.

[0016] Optionally, the beam splitter mirror group includes a plurality of beam splitters, and the included angle A between the annular circuit board and the beam splitter is greater than 90°.

[0017] Optionally, the first light source assembly includes a light shielding aperture plate, which is used to block the direct light of the second light source assembly to prevent the light of the second light source from directly irradiating the detection camera.

[0018] Optionally, the beam splitter mirror group includes at least four beam splitters.

[0019] Optionally, the support member is provided with a transparent bracket to support the workpiece in the detection station.

[0020] Compared with the prior art, the present utility model has the following beneficial effects:

[0021] For the detection device provided by the present utility model, the top surface and the outer periphery of the top of the workpiece are illuminated obliquely by the first light source assembly, the outer peripheral contour of the workpiece is illuminated by the second light source assembly, and the image of the outer peripheral contour is reflected to the detection camera through the beam splitter mirror group, so that a single detection camera can detect the top and the outer peripheral contour of the workpiece. Especially for some workpieces with irregular shapes, the detection effect is more accurate.

[0022] The present utility model has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent specific embodiments, or will be described in detail in the accompanying drawings incorporated herein and the subsequent specific embodiments. These drawings and specific embodiments are jointly used to explain the specific principles of the present utility model. Description of the Drawings

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0024] Figure 1 is a schematic cross-sectional view of the detection device provided by the embodiment of the present invention;

[0025] Figure 2 is a schematic top view of the detection device provided by the embodiment of the present invention.

[0026] Reference numerals: 1, first light source assembly; 11, annular circuit board; 12, first lamp bead; 2, second light source assembly; 3, detection camera; 4, beam splitter mirror group; 5, third light source assembly; 51, backlight board; 52, diffusion plate; 53, parallel film; 6, support member; 7, light absorbing plate; 8, light shielding aperture plate; 100, workpiece. Detailed implementation manners

[0027] To elaborate in detail on the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects, etc. of the present application, the following will be described in detail in conjunction with the specific embodiments listed and the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0028] Referring to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various positions in the specification does not necessarily refer to the same embodiment, nor is it particularly limited to the independence or relevance with other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0029] Unless otherwise defined, the meanings of the technical terms used in this article are the same as those generally understood by those skilled in the technical field to which the present application belongs; the use of the relevant terms in this article is only for describing specific embodiments and is not intended to limit the present application.

[0030] In the description of the present application, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: there is A, there is B, and there is both A and B at the same time. In addition, the character " / " in this article generally represents an "or" logical relationship between the associated objects in front and behind.

[0031] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary-secondary or sequential relationship between these entities or operations.

[0032] Without further limitation, in this application, the expressions "including", "comprising", "having" or other similar expressions used in a statement are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be additional elements in the process, method or product including the said elements, so that a process, method or product including a series of elements may not only include those defined elements, but also include other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0033] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the recited number; expressions such as "above", "below", "within" are understood to include the recited number. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two). Similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in this way unless otherwise specifically defined.

[0034] In the description of the embodiments of this application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the drawings. It is only for the convenience of describing the specific embodiments of this application or for the reader to understand, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it cannot be understood as a limitation to the embodiments of this application.

[0035] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the said "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art to which this application pertains, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0036] In view of the defects existing in the above-mentioned existing detection devices, the applicant, based on rich practical experience and professional knowledge in the design and manufacture of such products for many years, and in cooperation with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the existing technology, making the detection device more practical. After continuous research, design, and repeated trial production of samples and improvement, a practical and valuable utility model has finally been created.

[0037] Please refer to Figure 1 , an embodiment of the utility model provides a vision detection device, which can better detect the outer contour of the workpiece 100, especially the outer contour of workpieces with irregular shapes, improving the detection accuracy and reducing the device cost.

[0038] Please refer to Figure 1 and Figure 2 , a vision detection device, characterized in that it includes a first light source assembly 1, a second light source assembly 2 and a detection camera 3. The first light source assembly 1 and the second light source assembly 2 both surround the detection station, and the detection camera 3 is located on one side of the top of the detection station; the first light source assembly 1 is inclined to emit light obliquely downward to illuminate the top surface and the outer periphery of the top of the workpiece 100 in the detection station; the second light source assembly 2 is arranged on one side of the bottom of the first light source assembly 1 to emit light horizontally to the detection station to illuminate the outer periphery of the workpiece 100; a spectroscope mirror group 4 for reflecting the outer peripheral image of the workpiece 100 in the detection station to the detection camera 3 is inclined between the detection station and the second light source assembly 2.

[0039] Specifically, the first light source assembly 1 is inclined and surrounds the detection station, which can better illuminate the top surface and the outer periphery of the top of the workpiece 100 in the detection station, making the photographing and detection effect of the detection camera 3 better; the second light source assembly 2 illuminates the outer periphery of the workpiece 100 horizontally, so that all the detection surfaces required by the workpiece 100 can be well illuminated, so that the detection camera 3 can take clearer photos and improve the detection accuracy.

[0040] It should be particularly noted that only one detection camera 3 is used in this embodiment, which is beneficial to cost reduction.

[0041] Optionally, the first light source assembly 1 is an annular light source, including an annular circuit board 11 and first lamp beads 12 arranged on the surface of the annular circuit board 11 close to the detection station, and the annular circuit board 11 is in a horn shape. This can further improve the lighting effect, and the annular circuit board 11 forms a detection through hole, which is beneficial to reducing the possibility of detecting depressions on the workpiece 100, etc.

[0042] Optionally, the detection device further includes a third light source assembly 5. The third light source assembly 5 includes a backlight board 51 disposed on one side of the bottom of the detection station and a diffusion plate 52 mounted on the light-emitting side of the backlight board 51. A parallel film 53 is disposed on the surface of the diffusion plate 52 close to the detection station. Specifically, this can make the light rays directed to the bottom of the workpiece 100 all parallel light rays, better illuminate the bottom of the workpiece 100, and as backlight, can better reflect the specific shape of the workpiece 100, facilitating the detection by the detection camera 3. The parallel film 53 refers to a film assembly formed by alternately stacking multiple layers of films, and its light filtering characteristics can keep the light rays in a parallel state.

[0043] Optionally, the detection device further includes a support member 6. The first light source assembly 1, the second light source assembly 2, and the third light source assembly 5 are all mounted on the support member 6. The support member 6 supports each light source assembly, making the integrity of the detection device better, and facilitating movement and position adjustment.

[0044] Optionally, the support member 6 is in a barrel shape and includes a bottom wall 61 and an annular side wall 62; the first light source assembly 1 and the second light source assembly 2 are both mounted on the annular side wall 62, and the third light source assembly 5 is mounted on the bottom wall 61. The annular side wall 62 also has the function of blocking external stray light to improve the accuracy of visual detection.

[0045] Optionally, an absorbing plate 7 is disposed at the bottom of the beam splitter mirror group 4. The absorbing plate 7 absorbs stray light and reduces the stray light entering the detection camera 3 to further improve the detection accuracy.

[0046] Optionally, the beam splitter mirror group 4 includes a plurality of beam splitters, and the angle A between the annular circuit board 11 and the beam splitter is greater than 90°. Specifically, the size of the angle A between the annular circuit board 11 and the beam splitter can be reasonably set according to the specific size and shape of the workpiece 100.

[0047] Optionally, the first light source assembly 1 includes a light shield plate 8, and the light shield plate 8 is used to block the direct light rays of the second light source assembly 2 to prevent the light rays of the second light source from directly irradiating the detection camera 3.

[0048] Optionally, the beam splitter mirror group 4 includes at least four beam splitters.

[0049] Optionally, the support member 6 is provided with a transparent bracket to support the workpiece in the detection station.

[0050] Finally, it should be noted that although the above embodiments have been described in the text of the specification and the drawings of this application, the patent protection scope of this application cannot be limited thereby. Any technical solutions obtained by equivalent structure or equivalent process substitution or modification based on the substantial concept of this application and using the content recorded in the text of the specification and the drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, etc., are all included in the patent protection scope of this application.

Claims

1. A visual inspection device, characterized in that: The device comprises a first light source assembly (1), a second light source assembly (2) and a detection camera (3), wherein the first light source assembly (1) and the second light source assembly (2) are both arranged around a detection station, and the detection camera (3) is located on one side of the top of the detection station; The first light source assembly (1) is arranged obliquely so as to emit light obliquely downward to illuminate the top surface and top periphery of the workpiece (100) in the inspection station; The second light source assembly (2) is arranged at one side of the bottom of the first light source assembly (1) to emit light horizontally toward the detection station to illuminate the periphery of the workpiece (100); a beam splitter assembly (4) is obliquely arranged between the detection station and the second light source assembly (2) for reflecting an image of the periphery of the workpiece (100) in the detection station to a detection camera (3).

2. The detection device according to claim 1, characterized in that: The first light source assembly (1) is an annular light source, comprising an annular circuit board (11) and first lamp beads (12) arranged on a surface of the annular circuit board (11) close to the detection station, and the annular circuit board (11) is horn-shaped.

3. The detection device according to claim 1, characterized in that: The invention also comprises a third light source assembly (5), the third light source assembly (5) comprising a backlight panel (51) arranged at one side of the bottom of the detection station and a diffusion panel (52) installed at the light emitting side of the backlight panel (51), and a parallel film (53) is arranged on the panel surface of the diffusion panel (52) close to the detection station.

4. The detection device according to claim 3, characterized in that: It also comprises a support member (6), and the first light source assembly (1), the second light source assembly (2) and the third light source assembly (5) are all mounted on the support member (6).

5. The detection device according to claim 4, characterized in that: The support member (6) is barrel-shaped and comprises a bottom wall (61) and an annular side wall (62); The first light source assembly (1) and the second light source assembly (2) are both mounted on the annular side wall (62), and the third light source assembly (5) is mounted on the bottom wall (61).

6. The detection device according to claim 1, characterized in that: A light absorbing plate (7) is provided at the bottom of the beam splitter assembly (4).

7. The detection device according to claim 2, characterized in that: The beam splitter assembly (4) comprises a plurality of beam splitters, and an angle A between the annular circuit board (11) and the beam splitters is greater than 90°.

8. The detection device according to claim 1, characterized in that: The first light source assembly (1) comprises an aperture plate (8), the aperture plate (8) being used to block direct light from the second light source assembly (2), thereby preventing the light from the second light source from directly irradiating the detection camera (3).

9. The detection device according to claim 1, characterized in that: The beam splitter assembly (4) comprises at least four beam splitters.

10. The detection device according to claim 5, characterized in that: The support member (6) is provided with a transparent bracket to support the workpiece in the detection station.

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