Visual inspection device

Abstract

The utility model relates to the technical field of visual inspection, and discloses a visual inspection device, which comprises an inspection camera; the reflecting mirror group comprises a first reflecting mirror and a second reflecting mirror, and the first reflecting mirror and the second reflecting mirror are distributed in a splayed shape so as to reflect a peripheral image of the workpiece to the detection camera; the closer to the detection camera, the larger the opening of the first reflecting mirror and the opening of the second reflecting mirror are; the light source assembly comprises a first light source and a second light source, the light emitting side of the first light source directly faces the first reflecting mirror, and the light emitting side of the second light source directly faces the second reflecting mirror; the first light source and the second light source are separated from each other to form a light channel, and the detection camera is located in the light channel. The visual inspection device can effectively reduce the cost of visual inspection.

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] For the current vision detection device, in order to detect the circumferential surface of a workpiece, generally at least three cameras need to be provided, and all the cameras are arranged in a circumferential array around the workpiece, so as to completely detect the outer circumferential surface of the workpiece. However, setting at least three cameras results in a relatively high equipment cost, which is not conducive to reducing the cost of vision detection.

[0003] In view of this, it is necessary to design a vision detection device that can help reduce the production cost of the vision detection device.

[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 help reduce the production cost of the vision detection device.

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

[0007] A vision detection device includes:

[0008] A detection camera;

[0009] A mirror group, including a first mirror and a second mirror, the first mirror and the second mirror are distributed in an eight-character shape to reflect the outer circumferential image of the workpiece to the detection camera; the closer to the detection camera, the larger the opening of the first mirror and the second mirror;

[0010] A light source assembly, including a first light source and a second light source, the light-emitting side of the first light source faces the first mirror, and the light-emitting side of the second light source faces the second mirror; the first light source and the second light source are separated from each other to form a light channel, and the detection camera is located in the light channel.

[0011] Optionally, the vision detection device further includes a first coaxial light source;

[0012] The first coaxial light source is installed on one side of the top of the mirror group to illuminate the top end of the workpiece, and a beam splitter is installed on the first coaxial light source to reflect the top end image of the workpiece to the detection camera.

[0013] Optionally, the vision detection device further includes a second coaxial light source;

[0014] The second coaxial light source is installed on one side of the bottom of the mirror group to illuminate the bottom end of the workpiece, and a beam splitter is installed on the second coaxial light source to reflect the image of the bottom end of the workpiece to the detection camera.

[0015] Optionally, along the central line direction of the detection camera, the detection camera, the light source assembly and the mirror group are sequentially arranged at intervals.

[0016] Optionally, the mirror surface of the first mirror faces the first light source, and the mirror surface of the second mirror faces the second light source.

[0017] Optionally, both the first mirror and the second mirror are plane mirrors;

[0018] Alternatively, both the first mirror and the second mirror are curved mirrors.

[0019] Optionally, the included angle between the mirror surfaces of the first mirror and the second mirror is 120°.

[0020] Optionally, a vertical gap for the workpiece to pass through is formed between the first mirror and the second mirror, and a horizontal gap for the workpiece to pass through is formed between the first coaxial light source and the second coaxial light source.

[0021] Optionally, the first coaxial light source includes a housing, a first lamp board, a diffusion plate and a beam splitter;

[0022] The first lamp board and the diffusion plate are both installed in the housing, and the light emitted by the first lamp board sequentially passes through the diffusion plate and the beam splitter and is projected onto the workpiece;

[0023] The structure of the second coaxial light source is the same as that of the first coaxial light source.

[0024] Optionally, the first light source includes an opaque housing and a second lamp board; the second lamp board is installed in the opaque housing; the opaque housing is used to prevent the light emitted by the second lamp board from directly irradiating the detection camera;

[0025] The structure of the second light source is the same as that of the first light source.

[0026] Compared with the prior art, the present utility model has the following beneficial effects:

[0027] For the vision detection device provided by the present utility model, the first light source and the second light source illuminate one side of the workpiece close to the detection camera, and the light illuminates the side of the workpiece far from the detection camera through the first mirror and the second mirror; the first mirror and the second mirror refract the image behind the workpiece into the detection camera, and only one detection camera can completely detect the outer peripheral image of the workpiece, which is beneficial to reducing the cost of vision detection.

[0028] The present utility model has other characteristics and advantages, which will be apparent from the accompanying drawings incorporated herein and the subsequent detailed description, or will be described in detail in the accompanying drawings incorporated herein and the subsequent detailed description. These accompanying drawings and the detailed description together are used to explain the specific principles of the present utility model. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the accompanying drawings required for use in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0030] Figure 1 is a three-dimensional structural schematic diagram of the vision detection device provided by the embodiment of the present utility model;

[0031] Figure 2 is a three-dimensional structural schematic diagram of the vision detection device provided by the embodiment of the present utility model under another viewing direction;

[0032] Figure 3 is a front view schematic diagram of the vision detection device provided by the embodiment of the present utility model;

[0033] Figure 4 is Figure 3 the sectional structure schematic diagram of A - A in

[0034] Figure 5 is Figure 3 the sectional structure schematic diagram of B - B in

[0035] Figure 6 is a top view schematic diagram of the vision detection device provided by the embodiment of the present utility model;

[0036] Reference numerals: 1, detection camera; 2, mirror group; 201, vertical gap; 301, horizontal gap; 21, first mirror; 22, second mirror; 3, light source assembly; 31, first light source; 311, light - impermeable housing; 312, second lamp board 32,; second light source; 4, first coaxial light source; 41, housing; 42, first lamp board; 43, diffusion plate; 44, beam splitter; 5, second coaxial light source. Detailed Description of the Embodiments

[0037] To illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable objectives and effects of this application, the following will be described in detail with reference to the specific examples listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, and therefore are only examples and cannot be used to limit the protection scope of this application.

[0038] Reference to "embodiment" in this document means that a specific feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The term "embodiment" that appears in various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0039] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0040] In the description of this 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 document generally represents an "or" logical relationship between the associated objects before and after.

[0041] 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 quantity, primary or secondary, or order relationship between these entities or operations.

[0042] Without more limitations, in this application, the expressions such as "including", "comprising", "having" or other similar expressions used in the statement are intended to cover non-exclusive inclusion. These expressions do not exclude that there may be other elements in the process, method or product including the said elements, so that the 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 this process, method or product.

[0043] Similar to the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding", etc. are understood as not including the recited number; expressions such as "above", "below", "within", etc. are understood as including 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), and similar expressions related to "many", such as "multiple groups", "multiple times", etc., are understood in this way unless otherwise specifically limited.

[0044] 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, and is only for the convenience of describing the specific embodiments of this application or facilitating the understanding of the reader, 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, and therefore should not be construed as a limitation on the embodiments of this application.

[0045] Unless otherwise clearly specified or limited, in the description of the embodiments of this application, the terms such as "installed", "connected", "coupled", "fixed", "set", etc. should be understood in a broad sense. For example, the "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.

[0046] In view of the above-mentioned defects existing in the existing visual inspection devices, based on the 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, the applicant has actively carried out research and innovation in the hope of creating a technology that can solve the defects in the existing technology and make the visual inspection device more practical. After continuous research, design, and repeated trial production of samples and improvement, the present utility model with practical value has finally been created.

[0047] Please refer to Figures 1 to 6, an embodiment of the present utility model provides a vision detection device, including: a detection camera 1 for photographing and detecting a workpiece; a mirror group 2 including a first mirror 21 and a second mirror 22, the first mirror 21 and the second mirror 22 are arranged in a V shape, so as to reflect the outer peripheral image of the workpiece to the detection camera 1; the closer to the detection camera 1, the larger the opening of the first mirror 21 and the second mirror 22; from Figure 1 and Figure 2 it can be seen that during detection, the workpiece is located between the mirror group 2 and the detection camera 1. The detection camera 1 can directly photograph and detect the front of the workpiece, and the mirror group 2 can refract the image of the back of the workpiece to the detection camera 1 through the first mirror 21 and the second mirror 22, so that a detection camera 1 can detect the entire circumferential surface of the workpiece. A light source assembly 3 includes a first light source 31 and a second light source 32. The light-emitting side of the first light source 31 faces the first mirror 21, and the light-emitting side of the second light source 32 faces the second mirror 22; the first light source 31 and the second light source 32 are separated from each other to form a light channel, and the detection camera 1 is located in the light channel. The first light source 31 and the second light source 32 are used to better illuminate the workpiece. On the one hand, the first light source 31 and the second light source 32 can directly illuminate the side of the workpiece close to the detection camera 1; on the other hand, the light emitted by the first light source 31 is reflected by the first mirror 21, and the light emitted by the second light source 32 is reflected by the second mirror 22, so as to illuminate the side of the workpiece far from the detection camera 1, so that the outer peripheral surface of the workpiece can be better illuminated.

[0048] It should also be added that the first mirror 21 shoots the workpiece surface image through the light channel to the detection camera 1, and the second mirror 22 shoots the workpiece surface image through the light channel to the detection camera 1. The detection camera 1 is located in the interval between the first light source 31 and the second light source 32, and can also prevent the light of the light source assembly 3 from directly irradiating the detection camera 1 and affecting the detection accuracy.

[0049] Optionally, the vision detection device further includes a first coaxial light source 4; the first coaxial light source 4 is installed on one side of the top of the mirror group 2 to illuminate the top end of the workpiece, and the first coaxial light source 4 is equipped with a beam splitter 44 to reflect the top end image of the workpiece to the detection camera 1. In this embodiment, the detection camera 1 can also detect the top end of the workpiece at the same time to judge whether there are defects on the surface of the top end of the workpiece.

[0050] Optionally, the vision detection device further includes a second coaxial light source 5; the second coaxial light source 5 is installed on one side of the bottom of the mirror group 2 to illuminate the bottom end of the workpiece, and the second coaxial light source 5 is equipped with a beam splitter 44 to reflect the bottom end image of the workpiece to the detection camera 1. In this embodiment, the detection camera 1 can also detect whether there are defects on the surface of the bottom end of the workpiece at the same time.

[0051] Optionally, along the center line direction of the detection camera 1, the detection camera 1, the light source assembly 3, and the mirror group 2 are sequentially arranged at intervals. The mirror group 2 is opposite, and the detection camera 1 is located at the rear side of the light source assembly 3. At this time, the light source assembly 3 serves as a backlight assembly, which can effectively avoid interfering with the detection effect of the detection camera 1 and make the detection accuracy of the detection camera 1 better.

[0052] Optionally, the mirror surface of the first mirror 21 faces the first light source 31, and the mirror surface of the second mirror 22 faces the second light source 32.

[0053] Optionally, both the first mirror 21 and the second mirror 22 are plane mirrors; in another specific embodiment, both the first mirror 21 and the second mirror 22 are curved mirrors. The curved mirrors can refract the entire back image of the large workpiece more completely into the detection camera 1, which cannot be achieved by plane mirrors.

[0054] Optionally, the included angle between the mirror surfaces of the first mirror 21 and the second mirror 22 is 120°, and the center line of the lens of the detection camera 1 forms an angle of 60° with both the first mirror 21 and the second mirror 22. That is, the first mirror 21 and the second mirror 22 are symmetrically arranged with respect to the lens center line.

[0055] Optionally, a vertical gap 201 for the workpiece to pass through is formed between the first mirror 21 and the second mirror 22, and a horizontal gap 301 for the workpiece to pass through is provided between the first coaxial light source 4 and the second coaxial light source 5. In this way, the workpiece can be input to the set detection workpiece along an inclined direction to avoid bumping into other components. For example, the workpiece can be transported by passing through the vertical gap 201 and the horizontal gap 301 through a transparent conveyor belt.

[0056] Optionally, the first coaxial light source 4 includes a housing 41, a first lamp board 42, a diffusion plate 43, and a beam splitter 44; the first lamp board 42 and the diffusion plate 43 are both installed in the housing 41, and the light emitted by the first lamp board 42 sequentially passes through the diffusion plate 43 and the beam splitter 44 and is projected onto the workpiece; the structure of the second coaxial light source 5 is the same as that of the first coaxial light source 4.

[0057] Optionally, the first light source 31 includes an opaque housing 311 and a second lamp board 312; the second lamp board 312 is installed in the opaque housing 311; the opaque housing 311 is used to prevent the light emitted by the second lamp board 312 from directly irradiating the detection camera 1; the structure of the second light source 32 is the same as that of the first light source 31.

[0058] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification 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 essential concept of this application and using the content recorded in the text and drawings of the specification of this application, as well as the direct or indirect implementation of 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: include: DetectCamera(1); A reflector group (2) comprising a first reflector (21) and a second reflector (22), wherein the first reflector (21) and the second reflector (22) are arranged in an "eight" shape to reflect the peripheral image of the workpiece to the detection camera (1); the closer to the detection camera (1), the larger the openings of the first reflector (21) and the second reflector (22); The light source assembly (3) comprises a first light source (31) and a second light source (32), wherein the light emitting side of the first light source (31) faces the first reflector (21), and the light emitting side of the second light source (32) faces the second reflector (22); the first light source (31) and the second light source (32) are separated from each other to form a light channel, and the detection camera (1) is located in the light channel.

2. The visual inspection device according to claim 1, characterized in that: It also includes a first coaxial light source (4); The first coaxial light source (4) is mounted on one side of the top of the reflector group (2) to illuminate the top of the workpiece, and the first coaxial light source (4) is equipped with a beam splitter (44) to reflect the top image of the workpiece to the detection camera (1).

3. The visual inspection device according to claim 2, characterized in that: Also includes a second coaxial light source (5); The second coaxial light source (5) is installed on one side of the bottom of the reflector group (2) to illuminate the bottom end of the workpiece, and the second coaxial light source (5) is installed with a beam splitter (44) to reflect the bottom end image of the workpiece to the detection camera (1).

4. The visual inspection device according to claim 1, characterized in that: Along the centerline direction of the detection camera (1), the detection camera (1), the light source assembly (3) and the reflector assembly (2) are sequentially arranged at intervals.

5. The visual inspection device according to claim 1, characterized in that: The mirror surface of the first reflector (21) faces the first light source (31), and the mirror surface of the second reflector (22) faces the second light source (32).

6. The visual inspection device according to claim 1, characterized in that: The first reflector (21) and the second reflector (22) are both plane mirrors; Alternatively, the first reflector (21) and the second reflector (22) are both curved mirrors.

7. The visual inspection device according to claim 1, characterized in that: The mirror angle between the first reflector (21) and the second reflector (22) is 120°.

8. The visual inspection device according to claim 3, characterized in that: A vertical gap (201) is formed between the first reflector (21) and the second reflector (22) for a workpiece to pass through, and a horizontal gap (301) is formed between the first coaxial light source (4) and the second coaxial light source (5) for a workpiece to pass through.

9. The visual inspection device according to claim 3, characterized in that: The first coaxial light source (4) comprises a housing (41), a first light panel (42), a diffusion plate (43) and a beam splitter (44); The first light panel (42) and the diffuser plate (43) are both installed in the housing (41), and the light emitted by the first light panel (42) sequentially passes through the diffuser plate (43) and the beam splitter (44) and is projected onto the workpiece; The structure of the second coaxial light source (5) is the same as that of the first coaxial light source (4).

10. The visual inspection device according to claim 1, characterized in that: The first light source (31) comprises a light-proof housing (311) and a second light board (312); the second light board (312) is installed in the light-proof housing (311); the light-proof housing (311) is used to prevent light emitted by the second light board (312) from directly irradiating the detection camera (1); The structure of the second light source (32) is the same as that of the first light source (31).

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