Fringe projection device and visual inspection device
By designing an adjustable stripe projection device, the light-emitting component and the lateral adjustment device are used to make the stripe bright area and dark area slide alternately on the workpiece surface, which solves the problem of blind spot caused by the fixed stripe bright area and dark area in the prior art, and enhances the detection capability of the inspection camera.
Patent Information
- Application Number
- CN202520268437.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-19
AI Technical Summary
In existing stripe projection devices, the positions of the bright and dark stripe areas are fixed, which means that some smaller surface defects cannot be detected by the detection camera.
Design a stripe projection device that uses a light-emitting component, a diffuser plate, and a lateral adjustment device to make the positions of the bright and dark stripe areas adjustable. The lateral adjustment device drives the stripe plate to move, so that the bright and dark stripe areas slide alternately on the workpiece surface, thereby enhancing the detection capability of the inspection camera.
It improves the inspection camera's ability to detect surface defects on workpieces, making it easier to discover small defects on the workpiece surface.
Smart Images
Figure CN223650417U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to light source structure technical field especially, relates to a stripe projection device and visual inspection device. BACKGROUND
[0002] Visual inspection is to use machine to replace the human eye to do measurement and judgment, thereby determining whether the workpiece surface exists defects. Among them, the light source is the important part of visual inspection, and the light source includes bar light source, stripe light source, point light source, ring light source, stripe projection device and the like.
[0003] The current stripe projection device can project a plurality of mutually separated bar light spots on the workpiece surface, so that whether the workpiece surface exists defects can be detected. The existing stripe projection device, the stripe light spot is fixedly not moved, that is, the bar bright area and the bar dark area on the workpiece surface cannot be switched, which is easy to cause that part of smaller surface defects cannot be detected by the detection camera.
[0004] Therefore, it is necessary to design a stripe projection device and visual inspection device, which can change the position of the bar bright area and the bar dark area projected on the workpiece.
[0005] The above information is given as background information only to assist with understanding the present disclosure, and does not constitute admission or recognition that any of the above information constitutes prior art with respect to the present disclosure. SUMMARY
[0006] The utility model provides a stripe projection device and visual inspection device, can change the position of the bar bright area and the bar dark area projected on the workpiece.
[0007] To achieve the above purpose, the utility model provides the following technical scheme:
[0008] A stripe projection device, comprising:
[0009] Light emitting assembly;
[0010] Diffusion plate, installed on the light emitting side of a plurality of light emitting assemblies;
[0011] Stripe plate, installed on the side of the diffusion plate away from the bar light emitting assembly, and the stripe plate array is provided with light emitting gap for light to pass through;
[0012] Transverse adjusting device, for driving the stripe plate to move along the set direction or along the opposite direction of the set direction, and the set direction is perpendicular to the light emitting gap.
[0013] Optionally, the light emitting assembly includes a plurality of bar light sources;
[0014] The light barriers and the strip-shaped light sources are parallel to the light-emitting gap.
[0015] Optionally, the stripe plate is slidably attached to the diffusion plate.
[0016] Optionally, the strip-shaped light source comprises a strip-shaped circuit board and lamp beads arranged on the strip-shaped circuit board.
[0017] Optionally, the lateral adjusting device comprises an electric driving device and a connecting block mounted on a driving end of the electric driving device, and the connecting block is detachably connected with the stripe plate.
[0018] The electric driving device can drive the connecting block to move a set distance each time, and the set distance is equal to the interval between two adjacent light barriers.
[0019] Optionally, the light-emitting assembly further comprises a fixed plate.
[0020] One end of the light barrier is fixedly connected with the fixed plate, and the other end is fixedly connected with the diffusion plate, and the diffusion plate is parallel to the fixed plate.
[0021] Optionally, a total reflection layer is coated on opposite side surfaces of the light barrier.
[0022] Optionally, the stripe plate is hollowed out from a light-proof material plate, and the surface of the stripe plate is fully coated with a light-absorbing layer.
[0023] Optionally, the stripe plate is integrally formed, and the electric driving device comprises a servo motor and a lead screw in transmission connection with the servo motor, and the connecting block is mounted on the lead screw.
[0024] A visual detection device comprises the stripe projection device.
[0025] Compared with the prior art, the stripe projection device has the following beneficial effects:
[0026] The stripe projection device and the visual detection device provided by the present application can emit light to the diffusion plate through the light-emitting assembly, and then the diffusion plate can uniformly emit the light to the stripe plate, and the light emitted from the diffusion plate can pass through the light-emitting gap, so that a stripe light spot (a strip-shaped light spot comprising a strip-shaped bright area and a strip-shaped dark area arranged at intervals) is formed on the surface of the workpiece; when it is necessary to adjust the positions of the strip-shaped bright area and the strip-shaped dark area, the lateral adjusting device can drive the stripe plate to move along a set direction, so that the strip-shaped bright area and the strip-shaped dark area are alternately slid on the surface of the workpiece, and the detection camera can more easily detect the surface defects of the workpiece.
[0027] 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
[0028] 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.
[0029] Figure 1 This is a three-dimensional schematic diagram of the stripe projection device provided in an embodiment of the present invention;
[0030] Figure 2 This is a bottom view schematic diagram of the stripe projection device provided in this embodiment of the utility model;
[0031] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure of the medium stripe projection device.
[0032] Reference numerals: 1. Light-emitting component; 11. Strip light source; 12. Light-blocking plate; 13. Fixing plate; 2. Diffusing plate; 3. Striped plate; 301. Light-emitting gap; 4. Lateral adjustment device; 41. Connecting block. 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] Example 1
[0043] In view of the aforementioned deficiencies in existing stripe projection 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 stripe projection device more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value has finally been created.
[0044] Please refer to Figures 1 to 3 This utility model provides a stripe projection device, including a light-emitting component 1, a diffuser plate 2, a stripe plate 3, and a lateral adjustment device 4.
[0045] A light-emitting component 1 is used to emit light; a diffuser plate 2 is installed on the light-emitting side of several light-emitting components 1 to homogenize the light; a stripe plate 3 is installed on the side of the diffuser plate 2 away from the stripe light-emitting components 1, and the stripe plate 3 array is provided with light-emitting slits 301 through which light can pass; a lateral adjustment device 4 is used to move the stripe plate 3 along a set direction or in the opposite direction of the set direction, and the set direction is perpendicular to the light-emitting slits 301. The set direction is generally parallel to the horizontal plane. That is, the stripe projection device generally emits light vertically downwards or vertically upwards.
[0046] In this embodiment, the key point is that by arranging light-emitting gaps 301 at intervals on the striped plate 3, light passes through the light-emitting gaps 301 to form striped light spots on the surface of the workpiece, and the striped plate 3 is moved by the lateral adjustment device 4, so that the surface of the workpiece can have alternating sliding of striped bright areas and striped dark areas, thereby facilitating the detection camera to take pictures and detect surface defects of the workpiece.
[0047] Specifically, the light-emitting component 1 emits light into the diffuser plate 2, and then the diffuser plate 2 makes the light evenly emitted into the stripe plate 3. The light emitted from the diffuser plate 2 passes through the light-emitting slit 301, thereby forming stripe light spots on the surface of the workpiece. The stripe light spots include stripe bright areas and stripe dark areas arranged at intervals. When it is necessary to adjust the position of the stripe bright areas and stripe dark areas, the lateral adjustment device 4 can drive the stripe plate 3 to move along the set direction, so that the stripe bright areas and stripe dark areas slide alternately on the surface of the workpiece, making it easier for the inspection camera to detect surface defects of the workpiece.
[0048] Optionally, the light-emitting assembly 1 includes a plurality of strip light sources 11; the strip light sources 11 are separated from each other by light-blocking plates 12, and both the light-blocking plates 12 and the strip light sources 11 are parallel to the light-emitting slits 301. Specifically, each strip light source 11 is used to emit a strip light spot onto the diffuser plate 2.
[0049] Optionally, the striped plate 3 can be slidably attached to the diffuser plate 2. A strip light source 11 is used to emit light into one of the light-emitting slits 301, or the emitted light is blocked by the light-blocking plate 12.
[0050] Optionally, the strip light source 11 includes a strip circuit board and LED beads arranged on the strip circuit board. The LED beads are LED beads. The light emitted between two adjacent strip light sources 11 is completely separated by the light shield 12 to avoid light leakage, crosstalk, and other problems.
[0051] Optionally, the lateral adjustment device 4 includes an electric drive device and a connecting block 41 mounted on the drive end of the electric drive device. The connecting block 41 is detachably connected to the striped plate 3. The electric drive device can move the connecting block 41 a set distance each time. The set distance is equal to the distance between two adjacent light-blocking plates 12, where the distance refers to the distance between the center surfaces of the two light-blocking plates 12. Specifically, the electric drive device is used to drive the connecting block 41 to move horizontally, thereby driving the striped plate 3 to move horizontally.
[0052] Optionally, the light-emitting assembly 1 also includes a fixing plate 13; the fixing plate 13 is used to support the strip light source 11. One end of the light-blocking plate 12 is fixedly connected to the fixing plate 13, and the other end is fixedly connected to the diffuser plate 2, thereby preventing light leakage and cross-contamination. The diffuser plate 2 is parallel to the fixing plate 13.
[0053] Optionally, a total reflection layer is coated on both sides of the light-blocking plate 12 to improve the brightness of the emitted light.
[0054] Optionally, the striped panel 3 is made of an opaque material with a perforated surface, and the surface of the striped panel 3 is fully coated with a light-absorbing layer to reduce the possibility of light leakage.
[0055] Optionally, the stripe plate 3 is integrally formed, and the electric drive device includes a servo motor and a lead screw connected to the servo motor, with the connecting block 41 mounted on the lead screw.
[0056] Example 2
[0057] This embodiment discloses a visual inspection device, including a stripe projection device as described in any one of Embodiment 1.
[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 stripe projection device, characterized in that, include: Light-emitting component (1); A diffuser plate (2) is installed on the light-emitting side of several light-emitting components (1); A striped plate (3) is installed on the side of the diffuser plate (2) away from the strip light-emitting component (1), and the striped plate (3) array is provided with light-emitting slits (301) through which light can pass; A lateral adjustment device (4) is used to drive the striped plate (3) to move along a set direction or in the opposite direction of the set direction, and the set direction is perpendicular to the light-emitting slit (301).
2. The stripe projection device according to claim 1, characterized in that, The light-emitting component (1) includes a plurality of strip light sources (11); The strip light sources (11) are separated from each other by light-blocking plates (12), and both the light-blocking plates (12) and the strip light sources (11) are parallel to the light-emitting slits (301).
3. The stripe projection device according to claim 1, characterized in that, The striped plate (3) can be slidably attached to the diffused plate (2).
4. The stripe projection device according to claim 1, characterized in that, The strip light source (11) includes a strip circuit board and LED beads arranged on the strip circuit board.
5. The stripe projection device according to claim 2, characterized in that, The lateral adjustment device (4) includes an electric drive device and a connecting block (41) installed on the drive end of the electric drive device. The connecting block (41) is detachably connected to the striped plate (3). The electric drive device can move the connecting block (41) a set distance each time, the set distance being equal to the distance between two adjacent light-blocking plates (12).
6. The stripe projection device according to claim 2, characterized in that, The light-emitting component (1) also includes a fixing plate (13); One end of the light-blocking plate (12) is fixedly connected to the fixing plate (13), and the other end is fixedly connected to the diffuser plate (2), and the diffuser plate (2) is parallel to the fixing plate (13).
7. The stripe projection device according to claim 1, characterized in that, The light-shielding plate (12) is coated with a total reflective layer on both opposite sides.
8. The stripe projection device according to claim 1, characterized in that, The striped plate (3) is made of an opaque material with a hollowed-out surface, and the surface of the striped plate (3) is fully coated with a light-absorbing layer.
9. The stripe projection device according to claim 5, characterized in that, The striped plate (3) is integrally formed, and the electric drive device includes a servo motor and a lead screw connected to the servo motor. The connecting block (41) is installed on the lead screw.
10. A visual inspection device, characterized in that, It includes a stripe projection device as described in any one of claims 1 to 9.