Surface detection device

Abstract

The utility model relates to the technical field of visual inspection, and discloses a surface detection device which comprises a shell, a first light emitting assembly and a first spectroscope, and a light absorption hole and a detection hole for a workpiece to enter are formed in the shell; the first light emitting assembly and the first spectroscope are both mounted in the shell; light emitted by the first light emitting assembly penetrates through the first spectroscope and is emitted to the detection hole; the light absorption hole is provided with an inclined face right facing the first spectroscope, and light emitted by the first light emitting assembly is reflected by the first spectroscope to the inclined face. A light absorption plate is attached to the inclined face, and the end, away from the first spectroscope, of the light absorption plate extends in the direction away from the first spectroscope and seals the light absorption hole. The surface detection device provided by the utility model can reduce stray light which is reflected by the light absorption plate and then is emitted to the spectroscope, and is beneficial to improving the detection precision.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection technology, and in particular to a surface inspection device. Background Technology

[0002] Existing surface inspection devices include a light source and a beam splitter. The light emitted from the light source can pass through the beam splitter and be directed onto the workpiece, thereby illuminating the workpiece surface. The image of the workpiece surface is reflected by the beam splitter and directed onto the camera, enabling the camera to take a picture and inspect the workpiece. A light-absorbing plate is generally set on the side of the beam splitter away from the camera, and the surface of the light-absorbing plate is usually perpendicular to the center line of the camera lens, thereby reducing the influence of stray light on the image and making the camera inspection more accurate.

[0003] However, existing light-absorbing plates cannot absorb 100% of the light, and a small portion of stray light will be reflected and sent to the camera through the beam splitter, affecting the camera's detection accuracy and thus reducing the detection accuracy of the surface detection device.

[0004] Therefore, it is necessary to design a surface inspection device that can reduce stray light reflected by the light-absorbing plate and directed towards the beam splitter, which is beneficial to improving the inspection accuracy.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a surface inspection device that can reduce stray light reflected from the light-absorbing plate and directed towards the beam splitter, thereby improving inspection accuracy.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A surface inspection device includes a housing, a first light-emitting component, and a first beam splitter, wherein the housing forms a light-absorbing hole and an inspection hole through which a workpiece can enter;

[0009] Both the first light-emitting component and the first beam splitter are installed in the housing; the light emitted by the first light-emitting component passes through the first beam splitter and is directed toward the detection aperture; the light-absorbing aperture has an inclined surface facing the first beam splitter, and the light emitted by the first light-emitting component is reflected by the first beam splitter and directed toward the inclined surface;

[0010] A light-absorbing plate is attached to the inclined surface, and the light-absorbing plate extends along the inclined surface into the light-absorbing hole and closes the light-absorbing hole.

[0011] Optionally, the surface inspection device may also include a camera;

[0012] The camera is mounted on the side of the first beam splitter away from the inclined surface, and the image of the workpiece can be reflected by the first beam splitter and projected onto the camera.

[0013] Optionally, the detection hole is a square hole;

[0014] Each of the square holes has a triangular reflector installed on its inner wall to reflect the image of the outer side of the workpiece to the first beam splitter.

[0015] Optionally, a first partition is formed between the light-absorbing hole and the detection hole;

[0016] The first partition plate has an inclined end face near the end of the first beam splitter, and the inclined end face faces away from the first beam splitter.

[0017] Optionally, the surface detection device further includes a first diffuser plate, which is installed on the light-emitting side of the first light-emitting component and located between the first light-emitting component and the first beam splitter.

[0018] Optionally, the surface detection device further includes a second light-emitting component and a second beam splitter;

[0019] The second beam splitter is located on the side of the first beam splitter away from the inclined surface, and the first beam splitter and the second beam splitter are parallel to each other;

[0020] The light emitted by the second light-emitting component is reflected sequentially by the second beam splitter and the first beam splitter and then directed toward the detection aperture.

[0021] Optionally, the surface inspection device further includes a black light-absorbing serrated layer, which faces the second beam splitter.

[0022] Optionally, the surface inspection device further includes a filter, which is installed between the second light-emitting component and the second beam splitter.

[0023] Optionally, the housing has a photographing hole facing the first beam splitter, and the camera, the detection hole, and the first beam splitter are arranged sequentially and alternately from top to bottom.

[0024] Optionally, the light-absorbing plate includes a first plate body attached to the inclined surface, a second plate body connected to the first plate body, and a third plate body connected to the second plate body;

[0025] The third plate closes the light-absorbing hole.

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

[0027] The surface detection device provided by this utility model has an inclined surface on one side of the bottom of the first beam splitter, and a light-absorbing plate is attached to the inclined surface. This allows a small amount of stray light reflected by the light-absorbing plate to be directed toward the light-absorbing hole. The stray light is absorbed by the extension of the light-absorbing plate that blocks the light-absorbing hole, which further reduces the stray light reflected toward the first beam splitter. This is equivalent to reducing the stray light entering the camera, which helps to improve the detection accuracy of the surface detection device.

[0028] This invention has other features and advantages that will be apparent from or will be set forth in detail in the accompanying drawings and the following detailed description, which together serve to explain the particular principles of this invention. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the installation structure of the surface detection device provided in this embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the installation structure of the triangular reflector provided in an embodiment of this utility model.

[0032] Reference numerals: 1. Housing; 11. Light-absorbing hole; 111. Inclined surface; 12. Detection hole; 13. First partition plate; 131. Inclined end face; 14. Photo capture hole; 2. First light-emitting assembly; 3. First beam splitter; 4. Light-absorbing plate; 411. First plate; 412. Second plate; 413. Third plate; 5. Camera; 6. Triangular reflector; 7. First diffuser plate; 81. Second light-emitting assembly; 82. Second beam splitter; 83. Black light-absorbing serrated layer; 84. Filter. Detailed Implementation

[0033] To illustrate the possible application scenarios, technical principles, implementable specific solutions, and achievable objectives and effects of this application in detail, the following description, in conjunction with the listed specific embodiments and accompanying drawings, provides a detailed explanation. The embodiments described herein are merely illustrative of the technical solutions of this application and are therefore intended to limit the scope of protection of this application.

[0034] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0035] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit this application.

[0036] In the description of this application, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " in this document generally indicates that the preceding and following objects have an "or" logical relationship.

[0037] In this application, terms such as “first” and “second” are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy or order relationship between these entities or operations.

[0038] Unless otherwise specified, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this application is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a list of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0039] Similar to the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments in this application, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0040] In the description of the embodiments of this application, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the purpose of describing the specific embodiments of this application or for the reader's understanding, and do not indicate or imply 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, they should not be construed as limitations on the embodiments of this application.

[0041] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this application, should be interpreted broadly. For example, "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 a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this application pertains, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0042] In view of the deficiencies of existing surface inspection devices, the applicant, based on years of practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, has actively conducted research and innovation in order to create a device that can overcome the deficiencies of the existing technology and make the surface inspection device more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value has finally been created.

[0043] Please refer to Figures 1 to 2 This utility model provides a surface detection device, including a housing 1, a first light-emitting component 2, and a first beam splitter 3.

[0044] The housing 1 provides support and forms a light-absorbing hole 11 and a detection hole 12 for the workpiece to enter. The workpiece can be inserted into the detection hole 12, the first light-emitting component 2 emits light and illuminates the workpiece, and then the camera can take pictures of the workpiece through the first beam splitter 3.

[0045] In this embodiment, both the first light-emitting component 2 and the first beam splitter 3 are installed in the housing 1. The light emitted from the first light-emitting component 2 passes through the first beam splitter 3 and is directed towards the detection hole 12. The light-absorbing hole 11 has an inclined surface 111 facing the first beam splitter 3. The light emitted from the first light-emitting component 2 is reflected by the first beam splitter 3 and directed towards the inclined surface 111. A light-absorbing plate 4 is attached to the inclined surface 111, and one end of the light-absorbing plate 4 extends along the inclined surface 111 into the light-absorbing hole 11 and closes the light-absorbing hole 11. For ease of understanding, after the first light-emitting component 2 is split by the first beam splitter 3, it forms a first light beam directed towards the workpiece and a second light beam directed towards the inclined surface 111. The first light beam illuminates the workpiece, while the light-absorbing plate 4 absorbs the second light beam, reducing stray light directed towards the first beam splitter 3.

[0046] In this embodiment, a light-absorbing plate 4 is attached to the inclined surface 111. The light-absorbing plate 4 is installed at an angle and extends to block the light-absorbing hole 11. This allows as much of the stray light reflected by the light-absorbing plate 4 as possible to be directed toward the light-absorbing hole 11 and absorbed by the extended portion of the light-absorbing plate 4 that blocks the light-absorbing hole 11. This reduces the stray light that is reflected and directed toward the first beam splitter 3, which is equivalent to reducing the stray light entering the camera 5. This helps to improve the detection accuracy of the surface detection device.

[0047] It should be further explained that the light-absorbing aperture 11 can be set at an angle, so that the aperture wall of the light-absorbing aperture 11 directly forms an inclined surface 111. Alternatively, the light-absorbing aperture 11 can be parallel to the detection aperture 12, and set as follows: Figure 1 The inclined surface 111 is bent relative to the center line of the light-absorbing aperture 11.

[0048] Optionally, the surface inspection device also includes a camera 5; the camera 5 is mounted on the side of the first beam splitter 3 away from the inclined surface 111, and the image of the workpiece can be reflected by the first beam splitter 3 and projected onto the camera 5. Figure 1 As shown, camera 5 is located directly above the first beam splitter 3, and the first beam splitter 3 is located directly above the inclined plane 111.

[0049] Optionally, the detection hole 12 is a square hole; each inner wall of the square hole is equipped with a triangular reflector 6 for reflecting the image of the outer side of the workpiece to the first beam splitter 3. In this case, four triangular reflectors 6 are provided, such as... Figure 2 As shown, four triangular reflectors 6 surround the workpiece, reflecting the entire outer periphery of the workpiece onto the first beam splitter 3, thereby enabling the camera 5 to detect the entire outer periphery of the workpiece.

[0050] Optionally, a first partition 13 is formed between the light-absorbing aperture 11 and the detection aperture 12; the end of the first partition 13 near the first beam splitter 3 has an inclined end face 131, with the inclined end face 111 facing away from the first beam splitter 3. The inclined structure of the inclined end face 131 can prevent the first partition 13 from reflecting light onto the first beam splitter 3, further reducing stray light incident on the first beam splitter 3.

[0051] Optionally, the surface inspection device further includes a first diffuser plate 7, which is installed on the light-emitting side of the first light-emitting component 2 and located between the first light-emitting component 2 and the first beam splitter 3. The first diffuser plate 7 can achieve the effect of uniform light emission, making the workpiece more uniformly illuminated.

[0052] Optionally, the surface inspection device further includes a second light-emitting component 81 and a second beam splitter 82; the second beam splitter 82 is located on the side of the first beam splitter 3 away from the inclined surface 111, and the first beam splitter 3 and the second beam splitter 82 are parallel to each other; the light emitted from the second light-emitting component 81 is reflected sequentially by the second beam splitter 82 and the first beam splitter 3 and then directed towards the inspection hole 12. The second light-emitting component 81 can provide supplementary lighting to the workpiece. For example, the second light-emitting component 81 can emit light of a different color than the first light-emitting component 2, thereby facilitating the camera 5 to detect specific types of defects and improving inspection accuracy.

[0053] Optionally, the surface inspection device also includes a black light-absorbing serrated layer 83, which faces the second beam splitter 82. The black light-absorbing serrated layer 83 absorbs light passing through the second beam splitter 82, reducing stray light reflected towards the camera 5. The serrated structure makes the light absorption rate of the black light-absorbing serrated layer 83 higher.

[0054] Optionally, the surface inspection device further includes a filter 84, which is installed between the second light-emitting assembly 81 and the second beam splitter 82. The filter 84 is used to ensure that the light incident on the second beam splitter 82 is of a specific color, thereby meeting the inspection requirements. Preferably, the filter 84 is detachable, allowing for the replacement of filters 84 of different colors.

[0055] Optionally, the housing 1 has a photographing hole 14 facing the first beam splitter 3, and the camera 5, the detection hole 12 and the first beam splitter 3 are arranged in a sequential and spaced order from top to bottom.

[0056] Optionally, the light-absorbing plate 4 includes a first plate 411 mounted on the inclined surface 111, a second plate 412 connected to the first plate 411, and a third plate 413 connected to the second plate 412; the third plate 413 closes the light-absorbing hole 11. The first plate 411 and the second plate 412 are inclined relative to each other, and the second plate 412 and the third plate 413 are perpendicular to each other.

[0057] Optionally, the angle between the inclined surface 111 and one side surface of the first beam splitter 3 is an acute angle.

[0058] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. A surface detection device, comprising a housing (1), a first light-emitting component (2), and a first beam splitter (3), characterized in that, The housing (1) forms a light-absorbing hole (11) and a detection hole (12) through which the workpiece can enter; The first light-emitting component (2) and the first beam splitter (3) are both installed in the housing (1); the light emitted by the first light-emitting component (2) passes through the first beam splitter (3) and is directed toward the detection hole (12); the light-absorbing hole (11) has an inclined surface (111) facing the first beam splitter (3), and the light emitted by the first light-emitting component (2) is reflected by the first beam splitter (3) and directed toward the inclined surface (111); A light-absorbing plate (4) is attached to the inclined surface (111), and the light-absorbing plate (4) extends along the inclined surface (111) into the light-absorbing hole (11) and closes the light-absorbing hole (11).

2. The surface detection device according to claim 1, characterized in that, It also includes a camera (5); The camera (5) is mounted on the side of the first beam splitter (3) away from the inclined surface (111), and the image of the workpiece can be reflected by the first beam splitter (3) and projected onto the camera (5).

3. The surface detection device according to claim 1, characterized in that, The detection hole (12) is a square hole; Each of the square holes is equipped with a triangular reflector (6) on the inner wall of each face for reflecting the image of the outer side of the workpiece to the first beam splitter (3).

4. The surface detection device according to claim 1, characterized in that, A first partition (13) is formed between the light-absorbing hole (11) and the detection hole (12); The first partition (13) has an inclined end face (131) formed at the end near the first beam splitter (3), and the inclined end face (111) faces away from the first beam splitter (3).

5. The surface detection device according to claim 1, characterized in that, It also includes a first diffuser plate (7), which is installed on the light-emitting side of the first light-emitting component (2) and is located between the first light-emitting component (2) and the first beam splitter (3).

6. The surface detection device according to claim 1, characterized in that, It also includes a second light-emitting component (81) and a second beam splitter (82); The second beam splitter (82) is located on the side of the first beam splitter (3) away from the inclined surface (111), and the first beam splitter (3) and the second beam splitter (82) are parallel to each other; The light emitted by the second light-emitting component (81) is reflected sequentially by the second beam splitter (82) and the first beam splitter (3) and then directed toward the detection hole (12).

7. The surface detection device according to claim 6, characterized in that, It also includes a black light-absorbing sawtooth layer (83), which is directly opposite the second beam splitter (82).

8. The surface inspection device according to claim 6, characterized in that, It also includes a filter (84) which is installed between the second light-emitting component (81) and the second beam splitter (82).

9. The surface detection device according to claim 2, characterized in that, The housing (1) has a photographing hole (14) facing the first beam splitter (3), and the camera (5), the detection hole (12) and the first beam splitter (3) are arranged sequentially from top to bottom.

10. The surface detection device according to claim 1, characterized in that, The light-absorbing plate (4) includes a first plate (411) attached to the inclined surface (111), a second plate (412) connected to the first plate (411), and a third plate (413) connected to the second plate (412); The third plate (413) closes the light-absorbing hole (11).

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