Arched light source and visual inspection device
By introducing a linear light source and an arc-shaped reflective surface into the arch light source, a linear light spot is formed, which solves the problem that the existing arch light source is difficult to detect small defects and realizes high-precision product inspection.
Patent Information
- Application Number
- CN202422859350.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-11-21
AI Technical Summary
Existing arched light sources are difficult to accurately detect small surface defects of products, have a small scope of application, and are difficult to achieve high-precision measurements.
An arched light source is designed, including an arched plate and a light output unit. A linear light source is used to form a linear light spot on the product surface through a through-groove, and the light is reflected by a curved reflective surface, which is then used in conjunction with a camera for detection.
It realizes the simultaneous detection of large-area defects and tiny scratches on products, and improves the application scope and detection accuracy of the arch light source.
Smart Images
Figure CN223306768U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machine vision detection, in particular to an arched light source and a vision detection device. Background Art
[0002] Machine vision is a rapidly developing branch of artificial intelligence. Simply put, it uses machines to replace the human eye for measurement and judgment. Specifically, a detection device captures an image of the target and transmits it to a dedicated image processing unit for processing, ultimately determining whether the product meets quality standards. Lighting plays a crucial role in the image capture process, directly determining the quality of the image data and the effectiveness of the application.
[0003] Some product inspection tasks, such as detecting large surface defects, surface unevenness, character defects on arc-shaped parts, edge defects on mobile phone casings, and defects on long cylindrical surfaces or shafts, typically require the use of an arched light source in conjunction with a camera. However, arched light sources generally have difficulty accurately detecting small surface defects (such as minor scratches) and achieving high-precision measurements, limiting their applicability.
[0004] In view of this, it is necessary to design an arch light source and a visual detection device to expand the application range of the arch light source.
[0005] The above information is presented as background information only to assist with an understanding of the present disclosure and is not a determination or admission that any of the above may be applicable as prior art with respect to the present disclosure. Utility Model Content
[0006] The utility model provides an arched light source and a visual detection device, which have a wider application range.
[0007] To achieve the above objectives, the present invention provides the following technical solutions:
[0008] An arched light source, comprising:
[0009] An arched plate, the inner side of which is a curved reflective surface, and a through groove is provided on the arched plate;
[0010] Two light emitting units are respectively located on one side of the bottom of two opposite edges of the arched plate; the light emitting units emit light toward the arc-shaped reflective surface, and the arc-shaped reflective surface reflects the light emitted by the light emitting units, so that the light is irradiated downward from between the two light emitting units onto the surface of the product;
[0011] A linear light source is installed on the outer side of the arched plate, and the emitted light passes through the through groove to form a linear light spot on the surface of the product.
[0012] Optionally, a detection port is further provided on the arched plate;
[0013] The arc-shaped reflecting surface is symmetrically arranged about the central symmetric plane, and the two light-emitting units are symmetrically arranged about the central symmetric plane;
[0014] The detection port and the linear light source are respectively located on two sides of the central symmetry plane.
[0015] Optionally, the arched light source further comprises two end mounting plates, each of which is provided with an arc-shaped slot, and opposite ends of the arched plate are respectively embedded in the arc-shaped slots of different end mounting plates.
[0016] Optionally, the light output unit includes a lamp board, and the lamp board includes a circuit board and lamp beads arranged in an array on the circuit board;
[0017] The arrangement direction of the lamp beads is parallel to the central symmetry plane.
[0018] Optionally, the light emitting unit further includes a reflective plate arranged on the light emitting side of the lamp bead, the reflective plate is arranged at an angle, and the inclination angle of the reflective plate is adjustable.
[0019] Optionally, a radiator is further mounted on the arched plate, and the lamp panel is mounted on the radiator.
[0020] Optionally, an air cooling device for cooling the radiator is provided on one side of the bottom of the radiator.
[0021] Optionally, the arc-shaped reflecting surface is curved around a set center line, and the two light-emitting units are respectively located on two opposite sides of the set center line.
[0022] Optionally, the through slot is parallel to the set center line.
[0023] A visual inspection device comprises the arched light source as described in any one of the above items.
[0024] Compared with the prior art, the present invention has the following beneficial effects:
[0025] The arched light source and visual inspection device provided by the utility model are characterized by a linear light source being arranged on an arched plate, and the light emitted by the linear light source can pass through the through groove to form a linear light spot on the surface of the product, and cooperate with the light emitted by the light emitting unit reflected by the arc-shaped reflecting surface, so that the camera can detect both larger surface defects of the workpiece and tiny scratches on the workpiece, thereby improving the application range of the arched light source.
[0026] The present invention has other features and advantages, which will be apparent from the accompanying drawings and subsequent detailed descriptions incorporated herein, or will be described in detail in the accompanying drawings and subsequent detailed descriptions incorporated herein, which together serve to explain the specific principles of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0028] Figure 1 This is a schematic top view of an arched light source provided by an embodiment of the present utility model;
[0029] Figure 2 yes Figure 1 AA cross-sectional structure diagram of the arch light source in FIG;
[0030] Figure 3 This is a schematic diagram of the three-dimensional structure of the arched light source provided by an embodiment of the utility model;
[0031] Figure 4 It is an exploded schematic diagram of the arched light source provided by an embodiment of the utility model.
[0032] Figure numerals: 1. Arched plate; 11. Arc-shaped reflecting surface; 12. Through-groove; 13. Detection port; 2. Light output unit; 21. Light board; 22. Reflecting plate; 3. Linear light source; 4. End mounting plate; 41. Arc-shaped slot; 5. Fixing plate; 6. Radiator; 7. Air cooling device; 100. Central symmetry plane; 200. Set center line; 300. Camera. DETAILED DESCRIPTION
[0033] In order to explain in detail the possible application scenarios, technical principles, specific solutions that can be implemented, and the purpose and effects of this application, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application and are therefore only examples and are not intended to limit the scope of protection of this application.
[0034] References to "embodiments" herein mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the word "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in this application, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the embodiments can be combined in any manner to form a corresponding implementable technical solution.
[0035] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which this application belongs; the use of relevant terms herein is only for describing specific embodiments and is not intended to limit this application.
[0036] In the description of this application, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.
[0037] In this application, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, priority or sequence relationship between these entities or operations.
[0038] Without further limitations, in this application, the words "include", "comprise", "have" or other similar expressions used in the sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.
[0039] Consistent with the understanding in the Examination Guidelines, in this application, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this application, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this manner, such as "multiple groups," "multiple times," etc., unless otherwise specifically defined.
[0040] In the description of the embodiments of the present application, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present application or facilitating 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, it should not be understood as a limitation on the embodiments of the present application.
[0041] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated 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 elements or the interaction relationship between two elements. For those skilled in the art of the present application, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0042] Example 1
[0043] In light of the aforementioned shortcomings of existing arched light sources, the applicant, drawing on years of extensive practical experience and expertise in the design and manufacture of such products, combined with applied theory, has actively engaged in research and innovation, hoping to develop a technology that can address these shortcomings and make arched light sources more practical. Through continuous research and design, repeated trial production and refinement, the applicant has finally created the present utility model, which possesses proven practical value.
[0044] Please refer to Figures 1 to 4 The embodiment of the utility model provides an arched light source, comprising: an arched plate 1, the inner side of which is an arc-shaped reflecting surface 11, and a through groove 12 is provided on the arched plate 1; two light-emitting units 2, respectively located on the bottom side of the opposite two edges of the arched plate 1; the light-emitting units 2 emit light toward the arc-shaped reflecting surface 11, and the arc-shaped reflecting surface 11 reflects the light emitted by the light-emitting units 2, so that the light is irradiated downward from between the two light-emitting units 2 onto the surface of the product; a linear light source 3 is installed on the outer side of the arched plate 1, and the emitted light passes through the through groove 12 to form a linear light spot on the surface of the product.
[0045] In actual applications, the light emitted by the light-emitting unit is reflected by the curved reflective surface 11 onto the product surface, thereby revealing larger defects. Furthermore, the linear light source 3 can form a linear light spot on the product, making small scratches on the product surface more clearly visible. Users can choose to turn the linear light source 3 on or off according to actual inspection needs, thereby meeting the lighting requirements of different inspections and expanding the applicability of the arched light source. It should be noted that the light emitted by the linear light source 3 in this embodiment can pass through the through-slot 12 and be directed toward the bottom surface of the product, thereby enabling both large-area defect detection and high-precision surface inspection of the product at a single inspection station.
[0046] It should be further explained that the camera 300 can be set on one side of the end of the arched light source to take pictures of the product at an angle; or a detection port 13 can be directly opened on the arched plate 1, and the camera 300 can take pictures of the product through the detection port 13.
[0047] Alternatively, as Figure 2 As shown, the arched plate 1 is also provided with an inspection port 13; the arcuate reflective surface 11 is symmetrically arranged about the central symmetric plane 100, and the two light emitting units 2 are symmetrically arranged about the central symmetric plane 100, so that the light reflected by the arcuate reflective surface 11 can be more evenly irradiated on the surface of the product; the camera 300 takes pictures of the workpiece through the inspection port 13 for inspection. Figure 2 It can be clearly seen that the detection port 13 is tilted and can accurately capture the area where the linear light spot is located. The detection port 13 and the linear light source 3 are located on both sides of the central symmetry plane 100 respectively.
[0048] Optionally, the arched light source also includes two end mounting plates 4, each provided with an arcuate slot 41. The opposing ends of the arched panel 1 fit into the arcuate slots 41 of each end mounting plate 4. The end mounting plates 4 support the arched panel 1, and the provision of the arcuate slots 41 simplifies assembly between the arched panel 1 and the end mounting plates 4. Furthermore, the end mounting plates 4 provide a light shielding effect, reducing the impact of stray light on detection.
[0049] Optionally, the light emitting unit 2 includes a lamp board 21, which includes a circuit board and an array of lamp beads arranged on the circuit board; the lamp beads are arranged parallel to the central symmetry plane 100. The lamp beads emit light onto the curved reflective surface 11, which then reflects the light, causing it to be emitted from between the two light emitting units 2. Preferably, the circuit board is arranged at an angle, so that the lamp beads emit light at an angled upward.
[0050] Optionally, the light emitting unit 2 also includes a reflective plate 22 arranged on the light emitting side of the lamp bead. The reflective plate 22 is tilted, and the tilt angle of the reflective plate 22 is adjustable, which can better adjust the angle of the light reflected on the curved reflective surface 11, thereby producing different lighting effects to meet the detection lighting needs of different products.
[0051] Optionally, a heat sink 6 is mounted on the arched plate 1, and the light board 21 is mounted on the heat sink 6. The heat sink 6 dissipates heat from the light board 21, thereby preventing the light board 21 from overheating. Furthermore, an air cooling device 7 is provided on one side of the bottom of the heat sink 6 for cooling the heat sink 6. The air cooling device 7 can further reduce the temperature of the light board 21, thereby increasing the luminous power of the light board 21.
[0052] Optionally, the arc-shaped reflecting surface 11 is curved around a set center line 200, and the two light-emitting units 2 are respectively located on two opposite sides of the set center line 200, such as Figure 2 As shown. Set the center line 200 perpendicular to Figure 2 The centerline position is magnified for ease of understanding. In this embodiment, the curved reflective surface is actually a portion of the wall of a circular hole.
[0053] Optionally, the through slot 12 is parallel to the set center line 200 .
[0054] Example 2
[0055] This embodiment discloses a visual inspection device, including the arched light source as described in the first embodiment.
[0056] like Figure 2 As shown, the camera 300 is an example installation position, and the camera 300 takes pictures to inspect the product through the inspection port 13.
[0057] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.
Claims
1. An arched light source, characterized in that: include: An arched plate (1), the inner side of which is a curved reflecting surface (11), and a through groove (12) is provided on the arched plate (1); Two light emitting units (2) are respectively located on one side of the bottom of two opposite edges of the arched plate (1); the light emitting units (2) emit light toward the arcuate reflecting surface (11), and the arcuate reflecting surface (11) reflects the light emitted by the light emitting unit (2), so that the light is irradiated downward from between the two light emitting units (2) onto the surface of the product; A linear light source (3) is installed on the outside of the arched plate (1), and the emitted light passes through the through groove (12) to form a linear light spot on the surface of the product.
2. The arch light source according to claim 1, characterized in that The arched plate (1) is also provided with a detection port (13); The arc-shaped reflection surface (11) is symmetrically arranged about the central symmetry plane (100), and the two light-emitting units (2) are symmetrically arranged about the central symmetry plane (100); The detection port (13) and the linear light source (3) are respectively located on both sides of the central symmetry plane (100).
3. The arch light source according to claim 1, characterized in that It also includes two end mounting plates (4), each of which is provided with an arc-shaped slot (41), and the two opposite ends of the arched plate (1) are respectively embedded in the arc-shaped slot (41) of different end mounting plates (4).
4. The arch light source according to claim 2, wherein: The light output unit (2) comprises a lamp board (21), and the lamp board (21) comprises a circuit board and lamp beads arranged in an array on the circuit board; The arrangement direction of the lamp beads is parallel to the central symmetry plane (100).
5. The arch light source according to claim 4, characterized in that: The light emitting unit (2) further comprises a reflective plate (22) arranged on the light emitting side of the lamp bead; the reflective plate (22) is arranged at an angle, and the inclination angle of the reflective plate (22) is adjustable.
6. The arch light source according to claim 4, characterized in that: A radiator (6) is also mounted on the arched plate (1), and the lamp panel (21) is mounted on the radiator (6).
7. The arch light source according to claim 6, characterized in that: An air cooling device (7) for cooling the radiator (6) is provided on one side of the bottom of the radiator (6).
8. The arch light source according to claim 1, wherein: The arc-shaped reflecting surface (11) is curved in an arc shape around a set center line (200), and the two light-emitting units (2) are respectively located on two opposite sides of the set center line (200).
9. The arch light source according to claim 8, characterized in that: The through slot (12) is parallel to the set center line (200).
10. A visual inspection device, characterized in that: The invention comprises the arch light source according to any one of claims 1 to 9.