Visual inspection device
By introducing a reflective prism group and a beam splitter into the visual inspection device, and utilizing the reflective film to reflect specific colored light to highlight the workpiece features, the problems of missed detection and false detection when inspecting complex workpieces in the prior art are solved, and higher inspection accuracy is achieved.
Patent Information
- Application Number
- CN202520303385.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-24
AI Technical Summary
Existing visual inspection devices are prone to missed detections, false detections, or inaccurate detections when inspecting complex workpieces, especially when the surface features of the workpiece are not obvious.
An image detection device, a first reflective prism group, and a beam splitter are used. A specific color of light is reflected through a reflective film to highlight the feature image of the workpiece, making the feature more obvious in the image. The feature image is then transmitted to the image detection device using the beam splitter.
It improves the accuracy of image detection, making the features of the workpiece more obvious in the image and enhancing the accuracy of the detection results.
Smart Images
Figure CN223650460U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of visual inspection technology, and in particular to a visual inspection device. Background Technology
[0002] Visual inspection uses machines to replace human eyes for measurement and judgment, and can be used to check whether workpieces are qualified. Existing visual inspection devices generally use camera modules to photograph the workpiece and then determine its qualification based on the captured images. However, because some workpiece surfaces are complex and the features to be inspected are not obvious, missed detections, incorrect detections, or inaccurate inspections are prone to occur.
[0003] Therefore, it is necessary to design a visual inspection device that can clearly highlight the features of the workpiece in the inspection image.
[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 that helps to more clearly highlight the features on the inspected workpiece in an image.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A visual inspection device includes an image inspection device, a first reflecting prism group, and a beam splitter.
[0008] The first reflective prism group is used to transmit the first feature image of the workpiece to the beam splitter, and the beam splitter is used to transmit the first feature image to the image detection device;
[0009] The beam splitter has a reflective film on its back side away from the image detection device for reflecting first color light to the image detection device to highlight the first feature image.
[0010] Optionally, the first reflecting prism group includes a first prism and a second prism;
[0011] Both the first prism and the second prism have inclined surfaces that are total reflection surfaces, and the total reflection surface on the first prism is parallel to the total reflection surface on the second prism.
[0012] Optionally, the visual inspection device also includes a second set of reflecting prisms;
[0013] The first reflective prism group is used to transmit the second feature image of the workpiece to the beam splitter, and the beam splitter is used to transmit the second feature image to the image detection device.
[0014] Optionally, the second reflecting prism group, the beam splitter prism, and the image detection device form a transmission optical path for transmitting the second feature image;
[0015] The transmission optical path is provided with a background light-emitting device for shining the second color light into the image detection device; the second color light is used to highlight the second feature image.
[0016] Optionally, the second reflecting prism group includes a third prism and a fourth prism, wherein the inclined surfaces of the third prism and the fourth prism are both total reflection surfaces, and the total reflection surface on the third prism is parallel to the total reflection surface on the fourth prism.
[0017] Optionally, the beam splitter is a square bispectral beam splitter.
[0018] Optionally, the image detection device includes a camera and a lens.
[0019] Optionally, the visual inspection device further includes a first adjustment device for adjusting the position of the first feature and a second adjustment device for adjusting the position of the second feature;
[0020] The image detection device is electrically connected to the first adjustment device and the second adjustment device respectively.
[0021] Optionally, the visual inspection device is provided with a supplementary lighting device for emitting light into the beam splitter prism;
[0022] The first color light is blue light, and the reflective film is a blue light reflective film.
[0023] Optionally, the visual inspection device further includes a housing; the image inspection device, the first reflective prism group, and the beam splitter are all installed in the housing.
[0024] Compared with the prior art, the present invention has the following beneficial effects:
[0025] The visual inspection device provided by this utility model, by setting up an image inspection device, a first reflective prism group, a beam splitter prism and a reflective film, is equivalent to making the first color light reflected by the reflective film constitute a backlight, thereby making the first feature of the workpiece relatively brighter under the backlight of the first color light, so that the image captured by the image inspection camera can clearly highlight the first feature, thus making the inspection result of the image inspection device more accurate.
[0026] 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
[0027] 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.
[0028] Figure 1 This is a top view schematic diagram of the visual inspection device provided in this embodiment of the utility model;
[0029] Figure 2 This is a three-dimensional structural diagram of the visual inspection device provided in an embodiment of the present invention.
[0030] Reference numerals: 1. Image detection device; 2. First reflecting prism group; 21. First prism; 22. Second prism; 3. Beam splitter prism; 4. Reflective film; 5. Second reflecting prism group; 51. Third prism; 52. Fourth prism. Detailed Implementation
[0031] 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.
[0032] In this document, the term "embodiment" means that the features, structures, or characteristics described in connection with the embodiments can 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.
[0033] 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.
[0034] 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.
[0035] 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.
[0036] 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.
[0037] 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.
[0038] 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.
[0039] 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.
[0040] In view of the deficiencies in the existing technology, 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 technology that can solve 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.
[0041] Please refer to Figures 1 to 2 This utility model provides a visual inspection device, including an image inspection device 1, a first reflecting prism group 2, and a beam splitter prism 3. Figure 1 In the diagram, the dashed line represents the path of light propagation.
[0042] The first reflecting prism group 2 is used to transmit the first feature image of the workpiece to the beam splitter prism 3, which in turn transmits the first feature image to the image detection device 1. The first reflecting prism group 2 may include multiple triangular prisms or prisms of other shapes and reflectors. A reflective film 4 is provided on the back side of the beam splitter prism 3 away from the image detection device 1 to reflect the first color light to the image detection device, and the reflective film 4 is used to highlight the first feature image. The first feature image is actually the image of the first feature reflected onto the first reflecting prism group 2.
[0043] In this embodiment, the structural arrangement of the image detection device 1, the first reflecting prism group 2, the beam splitter prism 3, and the reflective film 4 is equivalent to making the first color light reflected by the reflective film 4 constitute a backlight. This makes the first feature of the workpiece brighter relative to the background under the first color light backlight, thus making the image captured by the image detection camera 1 clearly highlight the first feature, thereby making the detection result of the image detection device 1 more accurate. The image detection device 1 is generally used to detect whether there are defects on the surface of the first feature, or to accurately determine the location of the first feature.
[0044] It should be noted that the surface of the first feature is either a colored surface or a fluorescent element. Clearly, the light reflected from the first feature and entering the image detection device 1 will produce a bright area when mixed with the first color light, which is evident in the color-changing phenomenon caused by light mixing. For different colored surfaces, the color of the first color light must also change accordingly. Similarly, it is also reasonable that the fluorescent element will have higher brightness under the illumination of the first color light.
[0045] Optionally, the first reflecting prism group 2 includes a first prism 21 and a second prism 22; the inclined surfaces of the first prism 21 and the second prism 22 are both total reflection surfaces, and the total reflection surface on the first prism 21 is parallel to the total reflection surface on the second prism 22. That is, the image of the first feature is reflected by the first prism 21 to the second prism 22, and finally directed towards the beam splitter prism 3.
[0046] Optionally, the visual inspection device further includes a second reflecting prism group 5; the first reflecting prism group 2 is used to transmit the second feature image of the workpiece to the beam splitter prism 3, and the beam splitter prism 3 is used to transmit the second feature image to the image inspection device 1. In this embodiment, the visual inspection device can simultaneously detect the first and second features of the workpiece.
[0047] Optionally, the second reflecting prism group 5, the beam splitter prism 3, and the image detection device 1 form a transmission optical path for transmitting the second feature image; the transmission optical path is provided with a background light output device for shining the second color light into the image detection device 1; the second color light is used to highlight the second feature image.
[0048] Specifically, the image detection device 1 simultaneously receives a highlighted first feature image and a highlighted second feature image, making it easy to detect whether the first and second features are symmetrical. Therefore, when symmetry between the first and second features is required, the image detection device 1 can be connected to a first adjustment device for adjusting the position of the first feature and a second adjustment device for adjusting the position of the second feature, allowing for real-time adjustment of the first and / or second feature positions. In this embodiment, both the first and second features can be sliding blocks slidably mounted on the workpiece and have different colors. The image detection device 1 is electrically connected to both the first and second adjustment devices.
[0049] Optionally, the second reflecting prism group 5 includes a third prism 51 and a fourth prism 52, the inclined surfaces of the third prism 51 and the fourth prism 52 are both total reflection surfaces, and the total reflection surface on the third prism 51 is parallel to the total reflection surface on the fourth prism 52.
[0050] Optionally, the beam splitter 3 is a square bispectral beam splitter 3.
[0051] Optionally, the image detection device 1 includes a camera and a lens. The lens is positioned directly opposite the beam splitter 3.
[0052] Optionally, the first reflecting prism group 2 and the second reflecting prism group 5 are symmetrical about the center line of the image detection device 1.
[0053] Optionally, the visual inspection device is equipped with a supplementary light device for emitting light to the beam splitter 3; the first color light is blue light, and the reflective film 4 is a blue light reflective film.
[0054] Optionally, the visual inspection device also includes a housing; the image inspection device 1, the first reflecting prism group 2, and the beam splitter prism 3 are all installed in the housing.
[0055] 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 an image detection device (1), a first reflecting prism group (2), and a beam splitter (3); The first reflecting prism group (2) is used to transmit the first feature image of the workpiece to the beam splitter (3), and the beam splitter (3) is used to transmit the first feature image to the image detection device (1); The back of the beam splitter (3) away from the image detection device (1) is provided with a reflective film (4) for reflecting the first color light to the image detection device (1) to highlight the first feature image.
2. The visual inspection device according to claim 1, characterized in that, The first reflecting prism group (2) includes a first prism (21) and a second prism (22); The inclined surfaces of the first prism (21) and the second prism (22) are both total reflection surfaces, and the total reflection surface on the first prism (21) is parallel to the total reflection surface on the second prism (22).
3. The visual inspection device according to claim 1, characterized in that, It also includes a second reflecting prism assembly (5); The first reflective prism group (2) is used to transmit the second feature image of the workpiece to the beam splitter (3), and the beam splitter (3) is used to transmit the second feature image to the image detection device (1).
4. The visual inspection device according to claim 3, characterized in that, The second reflecting prism group (5), the beam splitter (3), and the image detection device (1) form a transmission optical path for transmitting the second feature image; The transmission optical path is provided with a background light-emitting device for shining the second color light into the image detection device (1); the second color light is used to highlight the second feature image.
5. The visual inspection device according to claim 3, characterized in that, The second reflecting prism group (5) includes a third prism (51) and a fourth prism (52). The inclined surfaces of the third prism (51) and the fourth prism (52) are both total reflection surfaces. The total reflection surface on the third prism (51) is parallel to the total reflection surface on the fourth prism (52).
6. The visual inspection device according to claim 1, characterized in that, The beam splitter (3) is a square bispectral beam splitter (3).
7. The visual inspection device according to claim 1, characterized in that, The image detection device (1) includes a camera and a lens.
8. The visual inspection device according to claim 4, characterized in that, It also includes a first adjustment device for adjusting the position of the first feature and a second adjustment device for adjusting the position of the second feature; The image detection device (1) is electrically connected to the first adjustment device and the second adjustment device respectively.
9. The visual inspection device according to claim 1, characterized in that, The visual inspection device is equipped with a supplementary lighting device for emitting light into the beam splitter (3); The first color light is blue light, and the reflective film (4) is a blue light reflective film.
10. The visual inspection device according to claim 1, characterized in that, It also includes a housing; the image detection device (1), the first reflective prism group (2) and the beam splitter (3) are all installed in the housing.