Workpiece surface detection device
By using a combination of optical refracting mirrors and refractive grooves in the workpiece surface inspection device to form a serpentine light spot path, the high cost problem caused by the large number of lasers in the prior art is solved, and low-cost and high-efficiency workpiece inspection is achieved.
Patent Information
- Application Number
- CN202520265280.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2035-02-18
AI Technical Summary
Existing workpiece surface inspection devices require a large number of linear lasers, resulting in high costs.
By employing first and second optical refracting mirrors arranged opposite to each other, and first and second refractive grooves, a serpentine path is formed by the reflection of the laser between the refractive grooves, creating a striped light spot to detect surface defects on the workpiece, thus reducing the number of lasers required.
It effectively reduces the cost of workpiece inspection and forms clear striped light spots on the workpiece surface, thereby improving inspection efficiency.
Smart Images
Figure CN223650459U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of visual inspection technology, and in particular to a workpiece surface inspection device. Background Technology
[0002] In the field of machine vision inspection technology, it is necessary to form striped light spots on the surface of the workpiece, and then take pictures to detect whether there is distortion or other issues with the striped light spots, thereby determining whether the workpiece has surface defects.
[0003] To create striped light spots on the surface of a workpiece, one method involves arranging several linear lasers on the left and right sides of the workpiece. The linear lasers project linear light spots onto the workpiece surface, with adjacent linear light spots being parallel to each other, thus creating striped light spots. However, this structure requires a large number of linear lasers, resulting in relatively high costs.
[0004] Therefore, it is necessary to design a workpiece surface inspection device that can help reduce the inspection cost of workpieces.
[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 workpiece surface inspection device, which can help reduce the inspection cost of workpieces.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A workpiece surface inspection device includes a first optical refracting mirror and a second optical refracting mirror arranged opposite to each other, and a first line laser;
[0009] The first optical refracting mirror has a plurality of first refractive grooves arranged on it, and the second optical refracting mirror has a plurality of second refractive grooves arranged on it. The first refractive grooves and the second refractive grooves have the same size.
[0010] The first refractive groove has a first groove surface and a second groove surface, and the first groove surface and the second groove surface are symmetrically arranged about a set vertical plane; the second refractive groove has a third groove surface parallel to the first groove surface and a fourth groove surface parallel to the second groove surface, and one side of the first groove surface and one side of the third groove surface are opposite to each other, and one side of the second groove surface and one side of the fourth groove surface are opposite to each other.
[0011] The first line laser is used to emit a line laser beam onto one of the first groove surfaces, and the line laser beam forms a line spot on the first groove surface, which is parallel to the set vertical surface.
[0012] Optionally, the first line laser is disposed on the second optical refracting mirror;
[0013] The first line lasers are arranged at least two at intervals from top to bottom, and the center lines of all the first line lasers are parallel to each other.
[0014] Optionally, the workpiece surface inspection device also includes a third optical refracting mirror and a fourth optical refracting mirror arranged opposite each other, as well as a second line laser;
[0015] The third optical refracting mirror has a plurality of third refraction grooves arranged on it, and the fourth optical refracting mirror has a plurality of fourth refraction grooves arranged on it. The third refraction grooves and the fourth refraction grooves are of the same size.
[0016] The third refractive groove has a fifth groove surface and a sixth groove surface, and the fifth groove surface and the sixth groove surface are symmetrically arranged about a set facade; the fourth refractive groove has a seventh groove surface parallel to the fifth groove surface and an eighth groove surface parallel to the sixth groove surface, and one side of the fifth groove surface and one side of the seventh groove surface are opposite to each other, and one side of the sixth groove surface and one side of the eighth groove surface are opposite to each other.
[0017] The second line laser is used to emit a line laser beam onto one of the fifth groove surfaces, and the line laser beam forms a line spot on the fifth groove surface, which is parallel to the designated vertical surface;
[0018] The third optical refracting mirror is located on the top side of the first optical refracting mirror, and the fourth optical refracting mirror is located on the bottom side of the first optical refracting mirror.
[0019] Optionally, three second line lasers are provided, arranged at intervals from left to right.
[0020] Optionally, the workpiece surface inspection device also includes an L-shaped connector;
[0021] The top of the first optical refracting mirror and the third optical refracting mirror are fixedly connected by the L-shaped connector;
[0022] The top of the second optical refracting mirror and the third optical refracting mirror are fixedly connected by the L-shaped connector.
[0023] Optionally, the bottom end of the first optical refracting mirror and the fourth optical refracting mirror are fixedly connected by the L-shaped connector; the bottom end of the second optical refracting mirror and the fourth optical refracting mirror are fixedly connected by the L-shaped connector.
[0024] Optionally, each of the L-shaped connectors is equipped with a detection camera.
[0025] Optionally, the workpiece surface inspection device further includes a connecting plate, and each of the L-shaped connectors is fixedly connected to the connecting plate.
[0026] Optionally, the first optical folding mirror is perpendicular to the third optical folding mirror.
[0027] Optionally, the workpiece surface inspection device further includes a light-shielding housing, in which the first optical refracting mirror, the second optical refracting mirror, and the first line laser are all installed.
[0028] Compared with the prior art, the present invention has the following beneficial effects:
[0029] The workpiece surface inspection device provided by this utility model emits a linear laser beam from a first line laser onto a first groove surface. The first groove surface reflects the laser beam to a second groove surface, which then reflects it to a third groove surface of a second refractive groove. The third groove surface reflects the laser beam to a fourth groove surface, which in turn reflects it to a first groove surface of another first refractive groove. This creates a serpentine laser path: first refractive groove – second refractive groove – second first refractive groove – second second refractive groove, and so on. When the laser beam is refracted from the first refractive groove to the second refractive groove, a striped light spot is formed on the workpiece surface. Similarly, when the laser beam is refracted from the second refractive groove to the first refractive groove, a striped light spot is also formed on the workpiece surface, resulting in a striped light spot pattern on the workpiece surface. This effectively and conveniently detects the presence of defects in the workpiece. This workpiece surface inspection device eliminates the need for a large number of line lasers, effectively reducing production costs.
[0030] 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
[0031] 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.
[0032] Figure 1 This is a schematic diagram of the installation of the first optical folding mirror, the second optical folding mirror, and the first line laser provided in this embodiment of the utility model;
[0033] Figure 2This is a top view schematic diagram of the workpiece surface inspection device provided in this embodiment of the utility model;
[0034] Figure 3 yes Figure 2 A schematic diagram of the AA cross-sectional structure of the workpiece surface inspection device;
[0035] Figure 4 This is a side view schematic diagram of the workpiece surface inspection device provided in this embodiment of the utility model;
[0036] Figure 5 This is a three-dimensional schematic diagram of the workpiece surface inspection device provided in this embodiment of the utility model.
[0037] Reference numerals in the attached figures: 1. First optical refracting mirror; 11. First refractive groove; 111. First groove surface; 112. Second groove surface; 2. Second optical refracting mirror; 21. Second refractive groove; 211. Third groove surface; 212. Fourth groove surface; 3. First line laser; 4. Third optical refracting mirror; 41. Third refractive groove; 411. Fifth groove surface; 412. Sixth groove surface; 5. Fourth optical refracting mirror; 51. Fourth refractive groove; 511. Seventh groove surface; 512. Eighth groove surface; 6. Second line laser; 7. L-shaped connector; 8. Detection camera; 9. Connecting plate. Detailed Implementation
[0038] 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.
[0039] 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.
[0040] 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.
[0041] 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.
[0042] 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.
[0043] 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.
[0044] 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.
[0045] 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.
[0046] 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.
[0047] 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 technology that can solve the deficiencies of the existing technology and make the workpiece 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.
[0048] Please refer to Figures 1 to 5 This utility model provides a workpiece surface inspection device, including a first optical refracting mirror 1 and a second optical refracting mirror 2 arranged opposite to each other, and a first line laser 3.
[0049] For easier understanding, please refer to the following: Figure 1 .like Figure 1 As shown, a plurality of first refraction grooves 11 are arranged on the first optical refraction mirror 1, and a plurality of second refraction grooves 21 are arranged on the second optical refraction mirror 2. The first refraction grooves 11 and the second refraction grooves 21 are the same size.
[0050] The first refractive groove 11 has a first groove surface 111 and a second groove surface 112, and the first groove surface 111 and the second groove surface 112 are symmetrically arranged about a set vertical plane; the second refractive groove 21 has a third groove surface 211 parallel to the first groove surface 111 and a fourth groove surface 212 parallel to the second groove surface 112, and one side of the first groove surface 111 and one side of the third groove surface 211 are opposite to each other, and one side of the second groove surface 112 and one side of the fourth groove surface 212 are opposite to each other.
[0051] The first laser 3 is used to emit a line laser beam onto one of the first groove surfaces 111. The line laser beam forms a line spot on the first groove surface 111, which is parallel to the set vertical surface.
[0052] In this embodiment, the workpiece surface inspection device emits a linear laser beam from a first line laser 3 onto the first groove surface 111 of a first refractive groove 11. The first groove surface 111 then reflects the laser beam to a second groove surface 112, which in turn reflects it to a third groove surface 211 of a second refractive groove 21. The third groove surface reflects the laser beam to a fourth groove surface 212, which in turn reflects it to the first groove surface 111 of another first refractive groove 11. This results in a serpentine path for the laser beam: first refractive groove 11 – second refractive groove 21 – second first refractive groove 11 – second second refractive groove 21, and so on. When the laser beam is refracted from the first refractive groove 11 to the second refractive groove 21, a stripe-shaped light spot is formed on the workpiece surface. Similarly, when the laser beam is refracted from the second refractive groove 21 to the first refractive groove 11, a stripe-shaped light spot is also formed on the workpiece surface. This creates a striped light spot on the workpiece surface, which effectively and conveniently detects whether there are defects in the workpiece. The workpiece surface inspection device of this embodiment does not require a large number of line lasers, which can effectively reduce production costs.
[0053] It should be noted that the first groove surface 111 and the third groove surface 211 are of the same width and are parallel to each other. Similarly, the second groove surface 112 and the fourth groove surface 212 are of the same width and are parallel to each other.
[0054] Preferably, the first optical refracting mirror 1 is curved with its inner curved surface facing the second optical refracting mirror 2, and the second optical refracting mirror 2 is curved with its inner curved surface facing the first optical refracting mirror 1. This can reduce laser loss and help form a clear linear spot on the workpiece surface.
[0055] Optionally, the first line laser 3 is disposed on the second optical refracting mirror 2; at least two first line lasers 3 are disposed at intervals from top to bottom, and the center lines of all the first line lasers 3 are parallel to each other. Specifically, at least two first line lasers 3 are disposed, so that after the laser light is reflected by the first groove surface 111, more light can be reflected to the second groove surface 112, which helps to make the line of light spots on the workpiece clearer.
[0056] Optionally, the workpiece surface inspection device further includes a third optical refracting mirror 4 and a fourth optical refracting mirror 5 arranged opposite to each other, and a second line laser 6; the third optical refracting mirror 4 is provided with a plurality of third refractive grooves 41, and the fourth optical refracting mirror 5 is provided with a plurality of fourth refractive grooves 51, the third refractive grooves 41 and the fourth refractive grooves 51 being of the same size; the first optical refracting mirror 1, the second optical refracting mirror 2, the third optical refracting mirror 4 and the fourth optical refracting mirror 5 form a rectangular structure, thereby reducing laser leakage.
[0057] The third refractive groove 41 has a fifth groove surface 411 and a sixth groove surface 412, and the fifth groove surface 411 and the sixth groove surface 412 are symmetrically arranged about a set facade; the fourth refractive groove 51 has a seventh groove surface 511 parallel to the fifth groove surface 411 and an eighth groove surface 512 parallel to the sixth groove surface 412, and one fifth groove surface 411 and one seventh groove surface 511 face each other, and one sixth groove surface 412 and one eighth groove surface 512 face each other; the second line laser 6 is used to emit a line laser towards one of the fifth groove surfaces 411, and the line laser spot formed on the fifth groove surface 411 is parallel to the set facade; the third optical refracting mirror 4 is located on the top side of the first optical refracting mirror 1, and the fourth optical refracting mirror 5 is located on the bottom side of the first optical refracting mirror 1.
[0058] Similarly, the laser emitted by the second laser 6, after being refracted by the arranged third and fourth refractive grooves 41 and 51, can form striped light spots on both the bottom and bottom of the workpiece.
[0059] It should also be noted that there are cases where the laser beam is reflected by the first refractive groove 11 and then directed towards the third refractive groove 41 or the fourth refractive groove 51, before being reflected back to the second refractive groove 21. Therefore, the laser beam actually flows between the first refractive groove 11, the second refractive groove 21, the third refractive groove 41, and the fourth refractive groove 51 and continues forward, thereby forming striped light spots for detection on the surface of the workpiece.
[0060] Optionally, three second-line lasers 6 are provided, arranged alternately from left to right. It should be noted that the center lines of the second-line lasers 6 and the center lines of the first-line lasers 3 are on the same plane.
[0061] Optionally, the workpiece surface inspection device further includes an L-shaped connector 7; the top end of the first optical refracting mirror 1 and the third optical refracting mirror 4 are fixedly connected by the L-shaped connector 7; the top end of the second optical refracting mirror 2 and the third optical refracting mirror 4 are fixedly connected by the L-shaped connector 7. The bottom end of the first optical refracting mirror 1 and the fourth optical refracting mirror 5 are fixedly connected by the L-shaped connector 7; the bottom end of the second optical refracting mirror 2 and the fourth optical refracting mirror 5 are fixedly connected by the L-shaped connector 7. The L-shaped connector 7 is used to maintain the relative positions between the first optical refracting mirror 1, the second optical refracting mirror 2, the third optical refracting mirror 4 and the fourth optical refracting mirror 5, and to keep the entire workpiece surface inspection device stable.
[0062] Optionally, each L-shaped connector 7 is equipped with a detection camera 8, which can effectively detect the surface condition of the entire outer periphery of the workpiece.
[0063] Optionally, the workpiece surface inspection device also includes a connecting plate 9, and each L-shaped connector 7 is fixedly connected to the connecting plate 9.
[0064] Optionally, the first optical reflecting mirror 1 is perpendicular to the third optical reflecting mirror 4.
[0065] Optionally, the workpiece surface inspection device also includes a light-shielding housing, in which the first optical reflecting mirror 1, the second optical reflecting mirror 2, and the first line laser 3 are all installed. The light-shielding housing is used to block and absorb the laser, preventing the laser from causing damage to the worker's eyes.
[0066] 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 workpiece surface inspection device, characterized in that, It includes a first optical folding mirror (1) and a second optical folding mirror (2) arranged opposite to each other, and a first line laser (3); The first optical refracting mirror (1) has a plurality of first refractive grooves (11) arranged on it, and the second optical refracting mirror (2) has a plurality of second refractive grooves (21) arranged on it. The first refractive grooves (11) and the second refractive grooves (21) have the same size. The first refractive groove (11) has a first groove surface (111) and a second groove surface (112), and the first groove surface (111) and the second groove surface (112) are symmetrically arranged about a set vertical plane; the second refractive groove (21) has a third groove surface (211) parallel to the first groove surface (111) and a fourth groove surface (212) parallel to the second groove surface (112), and one side of the first groove surface (111) and one side of the third groove surface (211) are opposite to each other, and one side of the second groove surface (112) and one side of the fourth groove surface (212) are opposite to each other; The first line laser (3) is used to emit a line laser onto one of the first groove surfaces (111), and the line laser spot formed on the first groove surface (111) is parallel to the set vertical surface.
2. The workpiece surface inspection device according to claim 1, characterized in that, The first line laser (3) is mounted on the second optical refracting mirror (2); The first line lasers (3) are arranged at least two from top to bottom, and the center lines of all the first line lasers (3) are parallel to each other.
3. The workpiece surface inspection device according to claim 1, characterized in that, It also includes a third optical folding mirror (4) and a fourth optical folding mirror (5) arranged opposite to each other, and a second line laser (6); The third optical refracting mirror (4) has a plurality of third refractive grooves (41) arranged on it, and the fourth optical refracting mirror (5) has a plurality of fourth refractive grooves (51) arranged on it. The third refractive grooves (41) and the fourth refractive grooves (51) have the same size. The third refractive groove (41) has a fifth groove surface (411) and a sixth groove surface (412), and the fifth groove surface (411) and the sixth groove surface (412) are symmetrically arranged about a set facade; the fourth refractive groove (51) has a seventh groove surface (511) parallel to the fifth groove surface (411) and an eighth groove surface (512) parallel to the sixth groove surface (412), and one side of the fifth groove surface (411) and one side of the seventh groove surface (511) are opposite to each other, and one side of the sixth groove surface (412) and one side of the eighth groove surface (512) are opposite to each other; The second line laser (6) is used to emit a line laser towards one of the fifth groove surfaces (411), and the line laser spot formed by the line laser on the fifth groove surface (411) is parallel to the set surface; The third optical refracting mirror (4) is located on the top side of the first optical refracting mirror (1), and the fourth optical refracting mirror (5) is located on the bottom side of the first optical refracting mirror (1).
4. The workpiece surface inspection device according to claim 3, characterized in that, There are three second line lasers (6), which are arranged at intervals from left to right.
5. The workpiece surface inspection device according to claim 3, characterized in that, It also includes an L-shaped connector (7); The top of the first optical refracting mirror (1) and the third optical refracting mirror (4) are fixedly connected by the L-shaped connector (7); The top of the second optical refracting mirror (2) and the third optical refracting mirror (4) are fixedly connected by the L-shaped connector (7).
6. The workpiece surface inspection device according to claim 5, characterized in that, The bottom end of the first optical refracting mirror (1) and the fourth optical refracting mirror (5) are fixedly connected by the L-shaped connector (7); the bottom end of the second optical refracting mirror (2) and the fourth optical refracting mirror (5) are fixedly connected by the L-shaped connector (7).
7. The workpiece surface inspection device according to claim 5, characterized in that, Each of the L-shaped connectors (7) is equipped with a detection camera (8).
8. The workpiece surface inspection device according to claim 6, characterized in that, It also includes a connecting plate (9), and each of the L-shaped connectors (7) is fixedly connected to the connecting plate (9).
9. The workpiece surface inspection device according to claim 3, characterized in that, The first optical refracting mirror (1) is perpendicular to the third optical refracting mirror (4).
10. The workpiece surface inspection device according to claim 1, characterized in that, It also includes a light-shielding housing, in which the first optical refracting mirror (1), the second optical refracting mirror (2), and the first line laser (3) are all installed.