Visual detection light source and defect detection device

Abstract

The utility model relates to the technical field of detection, and discloses a visual inspection light source and a defect detection device, comprising: an annular light source, which is provided with a first through hole and emits light in a downward inclined manner around the center line of the first through hole; the parallel light source is arranged on one side of the top of the annular light source and used for emitting parallel light rays into the first through hole, and the parallel light rays are parallel to the center line of the first through hole; the two ends of the cylinder body are fixedly connected with the annular light source and the parallel light source respectively, and the cylinder body surrounds the first through hole; a second through hole is formed in the barrel, and parallel light rays emitted by the parallel light source sequentially penetrate through the second through hole and the first through hole. According to the visual inspection light source and the defect detection device, the three-dimensional information of the workpiece can be detected, and the small surface defects of the workpiece can also be detected.

Description

Technical Field

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

[0002] Machine vision is a rapidly developing branch of artificial intelligence. It uses a camera to capture digital images of the target object, and then identifies and judges the workpiece based on pixel distribution, brightness, color, and other features in the image to determine whether the workpiece is qualified. This process typically requires a light source to illuminate the workpiece, ensuring the surface to be inspected receives a satisfactory image.

[0003] Different light sources are needed to meet different inspection requirements. Taking 3D inspection as an example, existing inspection light sources usually use ring light sources to illuminate the workpiece. Although this can detect the 3D information of the workpiece well, it is difficult to detect small surface defects on the workpiece surface.

[0004] Therefore, it is necessary to design a visual inspection light source and defect detection device that can conveniently detect the three-dimensional information of the workpiece as well as the small surface defects of the workpiece.

[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 visual inspection light source and a defect detection device, which can detect both the three-dimensional information of a workpiece and small surface defects.

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

[0008] A visual inspection light source, comprising:

[0009] A ring-shaped light source has a first through hole, and the ring-shaped light source emits light at an angle downward around the center line of the first through hole;

[0010] A parallel light source is disposed on one side of the top of the ring light source for injecting parallel light rays into the first through hole, and the parallel light rays are parallel to the center line of the first through hole.

[0011] The cylindrical body has its two ends fixedly connected to the annular light source and the parallel light source, respectively, and the cylindrical body surrounds the first through hole; the cylindrical body has a second through hole, and the parallel light rays emitted by the parallel light source pass through the second through hole and the first through hole in sequence.

[0012] Optionally, a detection hole is also provided on the cylinder wall, and the detection hole is perpendicular to the second through hole;

[0013] The cylinder is also equipped with a beam splitter that reflects the detected image toward the detection hole, and the parallel light rays emitted by the parallel light source can pass through the beam splitter.

[0014] Optionally, a light-absorbing cloth is also provided on the inner wall of the cylinder, the light-absorbing cloth and the detection hole are arranged opposite to each other, and the beam splitter is arranged between the light-absorbing cloth and the detection hole.

[0015] Optionally, the ring light source includes a housing and a light-emitting panel;

[0016] The housing includes a top plate, an annular side plate, and an arc-shaped diffuser plate, wherein the top plate, the annular side plate, and the arc-shaped diffuser plate form an annular cavity for mounting the light-emitting panel;

[0017] The top edge of the arc-shaped diffuser plate is fixed to the top plate, the bottom edge is fixed to the annular side plate, and the arc-shaped diffuser plate faces the center line of the first through hole.

[0018] Optionally, the light-emitting board includes a ring-shaped circuit board and LEDs arranged in a circumferential array on the ring-shaped circuit board;

[0019] The annular circuit board is mounted on the top plate and surrounds the first through hole.

[0020] Optionally, the inner surface of the annular side plate is a total reflective surface.

[0021] Optionally, an L-shaped buckle is provided at the bottom of the cylinder;

[0022] The top of the ring light source is provided with an L-shaped slot, and the L-shaped buckle is inserted into the L-shaped slot to fix the cylinder and the ring light source in place.

[0023] Optionally, the parallel light source includes a light-emitting element and a parallel mirror group disposed on the light-emitting side of the light-emitting element, with the light-emitting end of the parallel mirror group facing the first through hole.

[0024] Optionally, the light-emitting element further includes a turntable, a drive motor for driving the turntable to rotate around the center line of the turntable, and LED beads arranged in a circumferential array on the turntable, wherein adjacent LED beads emit different colors of light.

[0025] A defect detection device includes a visual inspection light source as described in any of the preceding claims.

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

[0027] The visual inspection light source and defect detection device provided by this utility model emits light downwards at an angle through a ring light source, and a parallel light source is set at the top of the ring light source. The parallel light emitted by the parallel light source passes through the first through hole of the ring light source and shines on the workpiece. In addition, the light emitted by the parallel light source is parallel to the center line of the first through hole. In this way, the surface of the workpiece can be illuminated by both the ring light source and the parallel light source at the same time, and the cylindrical body can reduce the interference of external stray light, thereby enabling better detection of the three-dimensional information and minute surface defects of the workpiece.

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

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

[0030] Figure 1 This is a schematic diagram of the installation structure of the visual inspection light source provided in this embodiment of the utility model;

[0031] Figure 2 This is a schematic diagram of the connection structure between the cylinder and the shell provided in this embodiment of the utility model;

[0032] Figure 3 This is a schematic diagram of the installation structure of a light-emitting element provided in an embodiment of this utility model.

[0033] Reference numerals: 1. Ring light source; 101. First through hole; 102. L-shaped slot; 11. Housing; 12. Light-emitting panel; 111. Top plate; 112. Ring side plate; 113. Arc-shaped diffuser plate; 121. Circuit board; 122. LED light; 2. Parallel light source; 21. Light-emitting component; 211. Turntable; 212. Drive motor; 213. Lamp bead; 22. Parallel mirror group; 3. Cylinder; 301. Second through hole; 302. Detection hole; 31. L-shaped buckle; 4. Beam splitter; 5. Light-absorbing cloth. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] Without further limitations, 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] Example 1

[0044] In view of the aforementioned deficiencies in existing visual inspection light sources, 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 light source more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value has finally been created.

[0045] Please refer to Figures 1 to 3This utility model embodiment provides a visual inspection light source, including: an annular light source 1, having a first through hole 101, and the annular light source 1 emits light downwards around the center line of the first through hole 101, the light emitted by the annular light source 1 being inclined close to the center line of the first through hole 101; a parallel light source 2, disposed on one side of the top of the annular light source 1, for injecting parallel light into the first through hole 101, and the parallel light is parallel to the center line of the first through hole 101; a cylindrical body 3, the two ends of the cylindrical body 3 being fixedly connected to the annular light source 1 and the parallel light source 2 respectively, thereby maintaining the relative positions of the annular light source 1 and the parallel light source 2, and the cylindrical body 3 surrounding the first through hole 101; the cylindrical body 3 forming a second through hole 301, the parallel light emitted by the parallel light source 2 passing sequentially through the second through hole 301 and the first through hole 101, thereby hitting the surface of the workpiece to be inspected.

[0046] The ring light source 1 emits light at an angle downwards, and a parallel light source 2 is positioned at the top of the ring light source 1. The parallel light emitted from the parallel light source 2 passes through the first through-hole 101 of the ring light source 1 and is directed towards the workpiece. The light emitted from the parallel light source 2 is parallel to the center line of the first through-hole 101. This allows the workpiece surface to be simultaneously illuminated by both the ring light source 1 and the parallel light source 2, resulting in better visualization of the workpiece's three-dimensional information and minute surface defects, thus facilitating camera inspection. Furthermore, the cylindrical body 3 reduces interference from stray light, enabling more accurate detection of the workpiece's three-dimensional information and minute surface defects.

[0047] Optionally, a detection hole 302 is also provided on the wall of the cylinder 3, the detection hole 302 being perpendicular to the second through hole 301; a beam splitter 4 is also provided in the cylinder 3 to reflect the detection image toward the detection hole 302, and the parallel light rays emitted from the parallel light source 2 can pass through the beam splitter 4. Figure 1 As shown, the camera lens is directly facing the detection hole 302, thereby detecting workpiece surface defects and workpiece three-dimensional information through the beam splitter 4.

[0048] Optionally, a light-absorbing cloth 5 is also provided on the inner wall of the cylinder 3, with the light-absorbing cloth 5 and the detection hole 302 arranged opposite to each other, and the beam splitter 4 is arranged between the light-absorbing cloth 5 and the detection hole 302. The arrangement of the light-absorbing cloth 5 can make the image captured by the camera more accurate and precise, reduce the interference of the image on the inner wall of the cylinder, and improve the detection accuracy and precision.

[0049] Optionally, the annular light source 1 includes a housing 11 and a light-emitting plate 12. The housing 11 includes a top plate 111, an annular side plate 112, and an arc-shaped diffuser plate 113. The top plate 111 and the annular side plate 112 are fixedly connected to provide support. The top plate 111, the annular side plate 112, and the arc-shaped diffuser plate 113 form an annular cavity for mounting the light-emitting plate 12. Preferably, the annular cavity is a sealed cavity, which can better protect the light-emitting plate 12 and reduce the possibility of damage to the light-emitting plate 12. The top edge of the arc-shaped diffuser plate 113 is fixed to the top plate 111, and the bottom edge is fixed to the annular side plate 112, and the arc-shaped diffuser plate 113 faces the center line of the first through hole 101. The arrangement of the arc-shaped diffuser plate 113 further improves the illumination effect of the annular light source 1 and helps to make the light diffuse more uniformly.

[0050] Optionally, the light-emitting board 12 includes an annular circuit board 121 and LED lights 122 arranged in a circular array on the annular circuit board 121; a plurality of LED lights 122 are provided, and the annular circuit board 121 is mounted on the top plate 111 and surrounds the first through hole 101 to improve the uniformity of light output.

[0051] Optionally, the inner surface of the annular side plate 112 is a total reflection surface, so that the light is reflected and emitted from the arc-shaped diffuser plate 113 to irradiate the surface of the workpiece.

[0052] Optionally, an L-shaped buckle 31 is provided at the bottom of the cylinder 3; an L-shaped slot 102 is provided at the top of the annular light source 1, and the L-shaped buckle 31 is inserted into the L-shaped slot 102 to fix the cylinder 3 and the annular light source 1 in place. The L-shaped buckle 31 and the L-shaped slot 102 make the installation of the cylinder 3 and the annular light source 1 faster and the installation positioning effect more accurate.

[0053] Optionally, the parallel light source 2 includes a light-emitting element 21 and a parallel mirror group 22 disposed on the light-emitting side of the light-emitting element 21, with the light-emitting end of the parallel mirror group 22 facing the first through hole 101.

[0054] Optionally, the light-emitting element 21 also includes a turntable 211, a drive motor 212 for rotating the turntable 211 around its center line, and LED beads 213 arranged in a circumferential array on the turntable 211, with adjacent LED beads 213 emitting different colors. Specifically, by changing the position of the turntable 211, the color of the parallel light emitted by the parallel light source 2 can be changed, thereby expanding the applicable range.

[0055] Example 2

[0056] This embodiment discloses a defect detection device, including a visual inspection light source as described in Embodiment 1.

[0057] 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 light source, characterized in that, include: The ring light source (1) has a first through hole (101), and the ring light source (1) emits light downwards around the center line of the first through hole (101); A parallel light source (2) is disposed on the top side of the ring light source (1) for injecting parallel light into the first through hole (101), and the parallel light is parallel to the center line of the first through hole (101). The cylindrical body (3) is fixedly connected at both ends to the annular light source (1) and the parallel light source (2), and the cylindrical body (3) surrounds the first through hole (101); the cylindrical body (3) has a second through hole (301), and the parallel light emitted from the parallel light source (2) passes through the second through hole (301) and the first through hole (101) in sequence.

2. The visual inspection light source according to claim 1, characterized in that, The cylinder wall of the cylinder body (3) is also provided with a detection hole (302), which is perpendicular to the second through hole (301); The cylinder (3) is also provided with a beam splitter (4) that reflects the detection image toward the detection hole (302), and the parallel light emitted from the parallel light source (2) can pass through the beam splitter (4).

3. The visual inspection light source according to claim 2, characterized in that, The inner wall of the cylinder (3) is also provided with a light-absorbing cloth (5), the light-absorbing cloth (5) and the detection hole (302) are arranged opposite to each other, and the beam splitter (4) is arranged between the light-absorbing cloth (5) and the detection hole (302).

4. The visual inspection light source according to claim 1, characterized in that, The ring light source (1) includes a housing (11) and a light-emitting panel (12); The housing (11) includes a top plate (111), an annular side plate (112), and an arc-shaped diffuser plate (113), wherein the top plate (111), the annular side plate (112), and the arc-shaped diffuser plate (113) form an annular cavity for mounting the light-emitting plate (12); The top edge of the arc-shaped diffuser plate (113) is fixed on the top plate (111), the bottom edge is fixed on the annular side plate (112), and the arc-shaped diffuser plate (113) faces the center line of the first through hole (101).

5. The visual inspection light source according to claim 4, characterized in that, The light-emitting board (12) includes a ring circuit board (121) and LED lights (122) arranged in a circumferential array on the ring circuit board (121); The annular circuit board (121) is mounted on the top plate (111) and surrounds the first through hole (101).

6. The visual inspection light source according to claim 4, characterized in that, The inner surface of the annular side plate (112) is a total reflective surface.

7. The visual inspection light source according to claim 2, characterized in that, The bottom of the cylinder (3) is provided with an L-shaped buckle (31); The top of the ring light source (1) is provided with an L-shaped slot (102), and the L-shaped buckle (31) is inserted into the L-shaped slot (102) to fix the cylinder (3) and the ring light source (1) in place.

8. The visual inspection light source according to claim 1, characterized in that, The parallel light source (2) includes a light-emitting element (21) and a parallel mirror group (22) disposed on the light-emitting side of the light-emitting element (21), with the light-emitting end of the parallel mirror group (22) facing the first through hole (101).

9. The visual inspection light source according to claim 8, characterized in that, The light-emitting element (21) also includes a turntable (211), a drive motor (212) for driving the turntable (211) to rotate around the center line of the turntable (211), and LED beads (213) arranged in a circumferential array on the turntable (211), and the light emitted by two adjacent LED beads (213) are different colors.

10. A defect detection device, characterized in that, It includes a visual inspection light source as described in any one of claims 1 to 9.

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