Visual inspection device
By employing a combination design of parallel light source, reflector, and beam splitter in the visual inspection device, the problem of local dark areas caused by the light source and reflector is solved, enabling complete and clear inspection of the outer peripheral surface of the workpiece.
Patent Information
- Application Number
- CN202422719823.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-07
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-11-07
AI Technical Summary
In existing visual inspection devices, the arrangement of the light source and reflector causes localized dark areas to appear on the outer periphery of the workpiece, affecting the inspection results.
The design employs a combination of a parallel light source, a reflector group, and a beam splitter. After being reflected by the reflector group, the light passes through the beam splitter and illuminates the outer surface of the workpiece. The light is then reflected by the beam splitter to the inspection camera, thus preventing the light from being completely blocked.
This improves the detection effect of the inspection camera, avoids local dark areas on the outer periphery of the workpiece, ensures image integrity and clarity, and enhances detection accuracy.
Smart Images
Figure CN223650446U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of light source technology, and in particular to a visual inspection device. Background Technology
[0002] The visual inspection device includes a light source, a reflector, and an inspection camera. The light emitted by the light source illuminates the outer peripheral surface of the workpiece, and the reflector reflects the outer peripheral surface of the workpiece to the inspection camera. Both the light source and the reflector are located on the outer periphery of the workpiece. Part of the light emitted by the light source is blocked by the reflector, which makes it easy for local dark areas to appear on the surface of the workpiece's peripheral surface, thus affecting the inspection effect of the camera.
[0003] Therefore, it is necessary to design a vision inspection device to better inspect the outer peripheral surface of a workpiece.
[0004] 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
[0005] This invention provides a visual inspection device for better inspection of the outer peripheral surface of a workpiece.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A visual inspection device includes a parallel light source, a mirror assembly, a beam splitter, and an inspection camera; the mirror assembly is disposed between the beam splitter and the parallel light source.
[0008] The light emitted by the parallel light source is reflected by the mirror group and then passes through the beam splitter to illuminate the outer peripheral surface of the workpiece. The detection camera is located directly above the detection station where the workpiece is placed.
[0009] The beam splitter is also used to reflect the peripheral image of the workpiece to the detection camera.
[0010] Optionally, the reflector group includes a first total reflection mirror that is tilted, and the parallel light source is positioned directly above the first total reflection mirror and emits light vertically downwards to illuminate the mirror surface of the first total reflection mirror; the first total reflection mirror reflects the light so that the light passes through the beam splitter and illuminates the outer periphery of the workpiece.
[0011] Optionally, one of the parallel light sources, one of the reflector groups, and one beam splitter are combined to form an illumination assembly;
[0012] The irradiation components are provided in at least two sets, and all the irradiation components are arranged in a circular array around a set center line.
[0013] Optionally, the reflector group includes a first total reflection mirror and a second total reflection mirror that are tilted, the second total reflection mirror being disposed above the first total reflection mirror, and the mirror surface of the first total reflection mirror being parallel to the mirror surface of the second total reflection mirror;
[0014] The horizontal light emitted from the parallel light source strikes the second total reflection mirror, and the light is reflected by the second total reflection mirror onto the first total reflection mirror. The first total reflection mirror then reflects the light so that the light passes through the beam splitter and illuminates the outer periphery of the workpiece.
[0015] Optionally, a light-absorbing plate is provided on one side of the bottom of the beam splitter, with one end of the light-absorbing plate abutting the bottom end of the light-absorbing plate and the other end abutting the first total reflection mirror.
[0016] Optionally, the angle between the beam splitter and the horizontal plane is α, and the angle between the mirror surface of the first total reflection mirror and the horizontal plane is β, where α > β.
[0017] Optionally, the value of b is 45°, and the value of a ranges from 60° to 80°.
[0018] Optionally, the parallel light source includes a housing, and a lamp bead, a first condensing lens, and a second condensing lens arranged sequentially along the light emission direction within the housing.
[0019] An inspection device includes a visual inspection apparatus as described in any of the preceding claims.
[0020] Compared with the prior art, the present invention has the following beneficial effects:
[0021] The visual inspection device provided by this utility model uses a beam splitter to reflect light emitted from a parallel light source. The light is reflected by a group of reflectors and then passes through the beam splitter onto the outer peripheral surface of the workpiece. The image of the outer peripheral surface of the workpiece can be reflected into the inspection camera through the beam splitter. In this embodiment, a beam splitter is used to reflect the image of the outer peripheral surface of the workpiece. Unlike a reflector, the beam splitter does not completely block the light, so that no local dark areas appear on the surface of the workpiece, which effectively improves the inspection effect of the inspection camera.
[0022] 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
[0023] 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.
[0024] Figure 1 This is a schematic diagram of the installation structure of the visual inspection device provided in this embodiment of the utility model.
[0025] Reference numerals: 1. Parallel light source; 11. Housing; 12. Lamp bead; 13. First condenser lens; 14. Second condenser lens; 2. Reflector group; 21. First total reflection mirror; 22. Second total reflection mirror; 3. Beam splitter; 4. Inspection camera; 5. Light-absorbing plate; 100. Workpiece. Detailed Implementation
[0026] 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.
[0027] 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.
[0028] 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.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] 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.
[0033] 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.
[0034] 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.
[0035] In view of the aforementioned deficiencies in existing visual inspection devices, the applicant, based on years of extensive 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 technology that can overcome the deficiencies in the existing technology and make the visual 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.
[0036] Please refer to Figure 1 This utility model provides a visual inspection device, including a parallel light source 1, a reflector group 2, a beam splitter 3, and an inspection camera 4; the reflector group 2 is disposed between the beam splitter 3 and the parallel light source 1; the light emitted from the parallel light source 1 is reflected by the reflector group 2 and then passes through the beam splitter 3 to illuminate the outer peripheral surface of the workpiece 100; the inspection camera 4 is located directly above the inspection station where the workpiece 100 is placed; the beam splitter 3 is also used to reflect the outer peripheral image of the workpiece 100 to the inspection camera 4.
[0037] In this embodiment, a beam splitter 3 is used to reflect the image of the outer periphery of the workpiece to the detection camera 4. The beam splitter 3 will not form a dark spot area on the outer periphery of the workpiece 100 due to the illumination of the parallel light source 1. This allows the image of the outer periphery of the workpiece 100 to be captured more completely by the detection camera 4, and the image captured by the detection camera 4 can be clearer, thereby enabling the detection camera 4 to detect the workpiece 100 more accurately.
[0038] Optionally, the reflector group 2 includes a first total reflection mirror 21 that is tilted, and a parallel light source 1 is positioned directly above the first total reflection mirror 21 to emit light vertically downwards to illuminate the mirror surface of the first total reflection mirror 21; the first total reflection mirror 21 reflects the light so that the light passes through the beam splitter 3 and illuminates the outer periphery of the workpiece 100.
[0039] Specifically, the parallel light source 1 is positioned directly above the first total reflection mirror 21, which can effectively reduce the footprint of the visual inspection device by increasing its height to achieve a lower footprint, thereby significantly reducing the footprint of the visual inspection device.
[0040] Optionally, a parallel light source 1, a reflector group 2, and a beam splitter 3 are combined to form an illumination assembly; at least two illumination assemblies are provided, and all illumination assemblies are arranged in a circumferential array around a set center line, so that the workpiece 100 can be photographed and inspected from more directions, and the complete circumferential surface of the workpiece 100 can be detected.
[0041] Optionally, the reflector assembly 2 includes a first total reflection mirror 21 and a second total reflection mirror 22, both angled. The second total reflection mirror 22 is positioned above the first total reflection mirror, and the mirror surface of the first total reflection mirror 21 is parallel to the mirror surface of the second total reflection mirror 22. Light rays emitted horizontally from the parallel light source 1 strike the second total reflection mirror 22, are reflected by the second total reflection mirror 22 onto the first total reflection mirror 21, and the first total reflection mirror 21 reflects the light rays so that they pass through the beam splitter 3 and illuminate the outer periphery of the workpiece 100. Specifically, as shown... Figure 1 As shown, the second total reflection mirror 22 and the parallel light source 1 are installed at a higher position than the first total reflection mirror 21. This means that the second total reflection mirror 22 and the parallel light source 1 can have space to install other components, increasing the positional adaptability of the visual inspection device and enabling it to be installed on different devices.
[0042] Optionally, a light-absorbing plate 5 is provided on one side of the bottom of the beam splitter 3, with one end of the light-absorbing plate 5 abutting against the bottom of the beam splitter 3 and the other end abutting against the first total reflection mirror 21. The light-absorbing plate 3 can prevent stray light from the bottom side of the beam splitter 3 from being refracted by the beam splitter 3 and entering the detection camera 4, thereby improving the clarity of the image.
[0043] Optionally, the angle between the beam splitter 3 and the horizontal plane is a, and the angle between the mirror surface of the first total reflection mirror 21 and the horizontal plane is b, where a > b.
[0044] Optionally, b can be 45°, and a can be 60°–80°.
[0045] Optionally, the parallel light source 1 includes a housing 11, and an LED 12, a first condenser lens 13, and a second condenser lens 14, which are sequentially arranged along the light emission direction and mounted in the housing 11. The first condenser lens 13 and the second condenser lens 14 are used to integrate the light emitted from the LED 12 into parallel light rays. The housing 11 provides support and fixation for the LED 12, the first condenser lens 13, and the second condenser lens 14.
[0046] 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 visual inspection device, characterized in that, It includes a parallel light source (1), a mirror group (2), a beam splitter (3), and a detection camera (4); the mirror group (2) is disposed between the beam splitter (3) and the parallel light source (1); The light emitted from the parallel light source (1) is reflected by the reflector group (2) and then passes through the beam splitter (3) to illuminate the outer peripheral surface of the workpiece (100). The detection camera (4) is located directly above the detection station where the workpiece (100) is placed. The beam splitter (3) is also used to reflect the peripheral image of the workpiece (100) to the detection camera (4).
2. The visual inspection device according to claim 1, characterized in that, The reflector group (2) includes a first total reflection mirror (21) set at an angle. The parallel light source (1) is set directly above the first total reflection mirror (21) and emits light vertically downward to illuminate the mirror surface of the first total reflection mirror (21). The first total reflection mirror (21) reflects the light so that the light passes through the beam splitter (3) and illuminates the outer periphery of the workpiece (100).
3. The visual inspection device according to claim 1, characterized in that, A parallel light source (1), a set of reflectors (2), and a beam splitter (3) are combined to form an illumination assembly; The irradiation components are provided in at least two sets, and all the irradiation components are arranged in a circular array around a set center line.
4. The visual inspection device according to claim 1, characterized in that, The reflector group (2) includes a first total reflection mirror (21) and a second total reflection mirror (22) that are tilted. The second total reflection mirror (22) is positioned above the first total reflection mirror, and the mirror surface of the first total reflection mirror (21) is parallel to the mirror surface of the second total reflection mirror (22). The horizontal light emitted by the parallel light source (1) strikes the second total reflection mirror (22), and the light is reflected by the second total reflection mirror (22) onto the first total reflection mirror (21). The first total reflection mirror (21) reflects the light so that the light passes through the beam splitter (3) and illuminates the outer periphery of the workpiece (100).
5. The visual inspection device according to claim 2, characterized in that, A light-absorbing plate (5) is provided on one side of the bottom of the beam splitter (3). One end of the light-absorbing plate (5) abuts against the bottom end of the light-absorbing plate (5), and the other end abuts against the first total reflection mirror (21).
6. The visual inspection device according to claim 2, characterized in that, The angle between the beam splitter (3) and the horizontal plane is a, and the angle between the mirror surface of the first total reflection mirror (21) and the horizontal plane is b, where a > b.
7. The visual inspection device according to claim 6, characterized in that, The value of b is 45°, and the value of a ranges from 60° to 80°.
8. The visual inspection device according to claim 1, characterized in that, The parallel light source (1) includes a housing (11), and a lamp bead (12), a first condenser lens (13), and a second condenser lens (14) arranged sequentially along the light emission direction in the housing (11).