Tunnel light source device and surface defect detection device

Abstract

The utility model relates to the technical field of light sources, and discloses a tunnel light source device and a surface defect detection device, and the tunnel light source device comprises a light reflecting plate which is provided with a concave arc-shaped diffuse reflection surface and a light passing opening; the lamp panel is mounted on one side of the bottom of the reflecting plate and used for emitting light rays to the arc-shaped diffuse reflection surface, and the arc-shaped diffuse reflection surface reflects the light rays emitted by the lamp panel to a workpiece on one side of the bottom of the reflecting plate; the total reflection mirror is arranged on the outer side of the light reflection plate in an inclination angle adjustable mode and used for reflecting light rays emitted by the lamp panel from the light passing opening; and light rays reflected by the total reflection mirror can enter from the light passing opening and irradiate the surface of a workpiece. The tunnel light source device and the surface defect detection device can effectively improve the application range and the detection accuracy.

Description

TECHNICAL FIELD

[0001] The utility model relates to light source technical field especially relates to a tunnel light source device and surface defect detection device. BACKGROUND

[0002] Machine vision detection technology refers to the image extraction device such as camera is replaced human eye and is carried out measurement and judgment one detection technology, has inestimable value in the aspect of detecting defects, has been widely applied in various industries.In the machine vision detection process, the influence of detection light source on detection result is very important, and the detection light source is point light source, strip light source, ring light source, tunnel light source and the like.

[0003] In the application scene such as product surface defect, mobile phone shell surface detection, processing part surface character defect detection, mobile phone shell edge defect detection, tunnel light source device needs to be used to cooperate detection camera and carry out detection.But the light of the conventional tunnel light source irradiated on the product is more uniform, cannot carry out light compensation in the specific area of the product, and the application range is narrow and the detection accuracy is low.

[0004] Therefore, it is necessary to design a tunnel light source device and surface defect detection device, which can effectively improve the application range and improve the detection accuracy.

[0005] The above information is given as background information only to assist in understanding the present disclosure, and does not determine or acknowledge whether any of the above content can be used as prior art with respect to the present disclosure. UTILITY MODEL CONTENT

[0006] The utility model provides a tunnel light source device and surface defect detection device, can effectively improve the application range and be favorable to improve the detection accuracy.

[0007] In order to achieve the above object, the utility model provides the following technical scheme:

[0008] A tunnel light source device, comprising:

[0009] The light-reflecting plate has an inner concave arc-shaped diffuse reflection surface and is provided with a light passage opening;

[0010] The lamp plate is installed on one side of the bottom of the light-reflecting plate, is used for emitting light to the arc-shaped diffuse reflection surface, and the arc-shaped diffuse reflection surface reflects the light emitted by the lamp plate to the workpiece on one side of the bottom of the light-reflecting plate;

[0011] The total reflection mirror is arranged on the outer side of the light-reflecting plate with adjustable inclination angle, is used for reflecting the light emitted by the lamp plate from the light passage opening; the light reflected by the total reflection mirror can be emitted from the light passage opening and irradiated on the surface of the workpiece.

[0012] Optionally, the light-reflecting plate is arched.

[0013] The light plates are spaced apart by two, respectively located at the bottom side of the two side edges of the light-reflecting plate; the light emitted by the total reflection mirror is emitted to the workpiece from the light outlet formed between the two light plates.

[0014] Optionally, the light passage is not directly above the light outlet.

[0015] Optionally, the total reflection mirror is provided with two, respectively located at the opposite sides of the light-reflecting plate;

[0016] The two ends of the light-reflecting plate are fixed on two fixed plates, and each fixed plate is rotatably installed with a total reflection mirror;

[0017] Between the adjacent light plate and the total reflection mirror, the light passage is provided.

[0018] Optionally, the fixed plate is provided with a mounting groove, and the end of the total reflection mirror is rotatably installed in the rotating column part in the mounting groove.

[0019] When the included angle between the reflecting surface of the total reflection mirror and the top surface of the fixed plate is the maximum, the total reflection mirror is perpendicular to the fixed plate.

[0020] Optionally, the total reflection mirror is a plane mirror.

[0021] Optionally, the total reflection mirror is a curved mirror.

[0022] Optionally, the light-reflecting plate is provided with a camera detection hole penetrating through the top.

[0023] Optionally, for the adjacent light plate and the total reflection mirror, the line connecting the centers of the two always passes through the light passage between the two.

[0024] A surface defect detection device comprises a detection camera and a tunnel light source device as claimed in any one of the preceding claims.

[0025] The detection camera is arranged at the top side of the light-reflecting plate and used for taking a photo of the workpiece located at the bottom side of the light-reflecting plate.

[0026] Compared with the prior art, the tunnel light source device has the following beneficial effects:

[0027] The tunnel light source device and the surface defect detection device have the following beneficial effects:

[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 top view schematic diagram of the tunnel light source device provided in this embodiment of the utility model;

[0031] Figure 2 yes Figure 1 A schematic diagram of the AA cross-sectional structure of the tunnel light source device in the diagram;

[0032] Figure 3 This is a front view schematic diagram of the tunnel light source device provided in an embodiment of this utility model.

[0033] Reference numerals: 1. Reflector; 2. Lamp plate; 3. Total reflection mirror; 31. Rotating column; 4. Fixing plate; 41. Mounting slot; 101. Curved diffuse reflection surface; 102. Light passage; 103. Camera detection hole; 10. Light exit port. 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] 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.

[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 tunnel lighting 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 tunnel lighting device 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 3 This utility model provides a tunnel light source device, including: a reflector 1 having a concave arc-shaped diffuse reflection surface 101 and a light-passing port 102; the reflector 1 can be an arched plate to directly form the arc-shaped diffuse reflection surface 101, or it can be a thick plate of other shapes, which only needs to be hollowed out to form the arc-shaped diffuse reflection surface 101; for example, the thick plate is provided with an arc-shaped groove, and a reflective layer is provided on the arc-shaped groove to form the arc-shaped diffuse reflection surface 101.

[0046] The lamp plate 2 is installed on the bottom side of the reflector 1 to emit light into the arc-shaped diffuse reflection surface 101, and the arc-shaped diffuse reflection surface 101 reflects the light emitted by the lamp plate 2 onto the workpiece on the bottom side of the reflector 1; the total reflection mirror 3 is set on the outside of the reflector 1 with an adjustable tilt angle to reflect the light emitted by the lamp plate 2 from the light passage 102; the light reflected by the total reflection mirror 3 can enter from the light passage 102 and illuminate the surface of the workpiece.

[0047] In this embodiment, the position of the light spot reflected by the total reflection mirror 3 onto the product can be adjusted by rotating the rotation angle of the total reflection mirror 3, achieving the effect of localized brightening with an adjustable brightening position. This allows for the detection of more types of products and improves detection accuracy. It should be noted that projecting the light spot onto the appropriate position on the product makes surface defects more visible, leading to more accurate detection by the inspection camera. Furthermore, the adjustable light spot position also makes it suitable for detecting products of more specifications.

[0048] Optionally, the total reflection mirror 3 is a plane mirror. Preferably, the total reflection mirror 3 is a curved mirror. The curved mirror has a light-focusing effect, thereby making the light spot projected onto the product surface brighter.

[0049] Optionally, in this embodiment, the reflector 1 is arched; two lamp panels 2 are spaced apart and located on the bottom side of the two sides of the reflector 1; a light outlet 10 is formed between the two lamp panels 2; the light reflected by the total reflection mirror 3 is directed towards the workpiece from the light outlet 10. The two lamp panels 2 emit light upwards, and then the arc-shaped diffuse reflection surface 101 reflects the light from the lamp panels 2, making the light illuminating the bottom side of the reflector 1 more uniform and preventing blind spots in illumination.

[0050] Optionally, the light-transmitting port 102 is not located directly above the light-exiting port 10. In this case, as... Figure 2 The area where the light-passing port 102 is located is an area where it is difficult to directly reflect light onto the product. If it were still a reflective surface, the utilization efficiency of light would be low. The total reflection mirror 3 directly reflects light onto the appropriate area of ​​the product, which can further improve the illumination effect, especially the illumination effect of specific areas of the product. This allows the subsequent inspection camera to better detect the condition of that specific area and improve the inspection accuracy.

[0051] Optionally, two total reflection mirrors 3 are provided, located on opposite sides of the reflector 1 respectively; the two ends of the reflector 1 are fixed on two fixing plates 4 respectively, and a total reflection mirror 3 can be rotatably installed on each fixing plate 4; a light passage 102 is provided between the adjacent lamp plate 2 and the total reflection mirror 3.

[0052] It should be noted that the light spots reflected by the two total reflection mirrors 3 can overlap or be separated, thus meeting the testing needs of different products.

[0053] Optionally, the fixing plate 4 is provided with a mounting groove 41, and the end of the total reflection mirror 3 is equipped with a rotating column 31 that can be rotatably mounted in the mounting groove 41; when the included angle between the reflecting surface of the total reflection mirror 3 and the top surface of the fixing plate 4 is at its maximum value, the total reflection mirror 3 is perpendicular to the fixing plate 4. In this embodiment, the rotation angle of the total reflection mirror 3 is limited to avoid the situation where the light reflected by the total reflection mirror 3 cannot illuminate the surface of the product.

[0054] Optionally, a through-hole camera inspection hole 103 is provided at the top of the reflector 1. The inspection camera takes pictures of the product through the camera inspection hole 103 for inspection.

[0055] Optionally, for adjacent light panels 2 and total reflection mirrors 3, the line connecting their centers always passes through the light-transmitting opening 102 between them. Specifically, this allows the total reflection mirror 3 to reflect more light onto the surface of the product, making the placement of the total reflection mirror 3 and the light-transmitting opening 102 more reasonable.

[0056] Example 2

[0057] This embodiment discloses a surface defect detection device, including a detection camera and a tunnel light source device as in Embodiment 1; the detection camera is disposed on the top side of the reflector 1, and takes pictures of the workpiece located on the bottom side of the reflector 1 through the camera detection hole 103.

[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 tunnel light source device, characterized in that, include: The reflector (1) has a concave arc-shaped diffuse reflection surface (101) and is provided with a light-transmitting port (102); The lamp plate (2) is installed on the bottom side of the reflector (1) for emitting light to the arc-shaped diffuse reflection surface (101), and the arc-shaped diffuse reflection surface (101) reflects the light emitted by the lamp plate (2) onto the workpiece on the bottom side of the reflector (1); The total reflection mirror (3) is set at an adjustable angle on the outside of the reflector (1) to reflect the light emitted from the light port (102) of the lamp plate (2); the light reflected by the total reflection mirror (3) can enter from the light port (102) and illuminate the surface of the workpiece.

2. The tunnel light source device according to claim 1, characterized in that, The reflector (1) is arched; Two lamp panels (2) are spaced apart and located on the bottom side of the two sides of the reflector (1); a light outlet (10) is formed between the two lamp panels (2); the light reflected by the total reflection mirror (3) is directed to the workpiece from the light outlet (10).

3. The tunnel light source device according to claim 2, characterized in that, The light-transmitting port (102) is not located directly above the light-emitting port (10).

4. The tunnel light source device according to claim 1, characterized in that, Two total reflection mirrors (3) are provided, located on opposite sides of the reflector (1); The two ends of the reflector (1) are respectively fixed on two fixed plates (4), and a total reflection mirror (3) can be rotatably installed on each of the fixed plates (4); The light-transmitting port (102) is provided between the adjacent lamp panel (2) and the total reflection mirror (3).

5. The tunnel light source device according to claim 4, characterized in that, The fixing plate (4) is provided with a mounting groove (41), and the end of the total reflection mirror (3) is provided with a rotating column (31) that can be rotatably installed in the mounting groove (41); When the angle between the reflecting surface of the total reflection mirror (3) and the top surface of the fixing plate (4) is at its maximum value, the total reflection mirror (3) is perpendicular to the fixing plate (4).

6. The tunnel light source device according to claim 1, characterized in that, The total reflection mirror (3) is a plane mirror.

7. The tunnel light source device according to claim 1, characterized in that, The total reflection mirror (3) is a curved mirror.

8. The tunnel light source device according to claim 1, characterized in that, The top of the reflector (1) is provided with a through camera detection hole (103).

9. The tunnel light source device according to claim 1, characterized in that, For adjacent lamp panels (2) and total reflection mirrors (3), the line connecting their centers always passes through the light-transmitting port (102) between them.

10. A surface defect detection device, characterized in that, Includes a detection camera and a tunnel light source device as described in any one of claims 1 to 9; The detection camera is located on the top side of the reflector (1) and is used to take pictures of the workpiece located on the bottom side of the reflector (1).

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