Elliptical light source device and double-camera visual inspection system

Abstract

The utility model relates to the technical field of detection light sources, and particularly discloses an elliptical light source device and a double-camera visual detection system, which comprise two conical lamp panels with the sizes gradually increased from top to bottom, and a plane lamp panel connected with the upper ends of the two conical lamp panels, a lamp panel avoiding hole is formed in the connecting position of the plane lamp panel and each conical surface lamp panel. The elliptical light source device and the double-camera visual inspection system provided by the utility model can effectively solve the problem that the conventional light source device cannot adapt to two camera modules to carry out lighting operation.

Description

Technical Field

[0001] The utility model relates to the technical field of light source detection, and in particular to an elliptical light source device and a dual-camera visual detection system. Background Art

[0002] Existing light source devices are usually circular or square in structure, with a light board avoidance hole set in the center of the light source device. By placing a camera module above the light board avoidance hole, the workpiece to be tested can be inspected through the light board avoidance hole. In recent years, the accuracy requirements for visual inspection have become increasingly higher, and a single camera module has been unable to meet market demand, and dual camera modules have become increasingly popular for simultaneous visual inspection. However, the existing light source device cannot only have one light board avoidance hole set in the center, and it is difficult to adapt to two camera modules. Therefore, it is necessary to improve the existing light source device to solve the problem that it cannot adapt to two camera modules for lighting operations.

[0003] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0004] One purpose of the utility model is to provide an elliptical light source device and a dual-camera visual inspection system, which can effectively solve the problem that the existing light source device cannot adapt to two camera modules for lighting operations.

[0005] To achieve the above objectives, on the one hand, the utility model provides an elliptical light source device, comprising two conical light panels whose sizes gradually increase from top to bottom, and a flat light panel connecting the upper ends of the two conical light panels;

[0006] Wherein, a light board avoidance hole is provided at the connection position between the planar light board and each of the conical light boards.

[0007] Optionally, it also includes an elliptical shell, and the flat light panel and the two conical light panels are all installed and fixed in the elliptical shell.

[0008] Optionally, the elliptical shell is provided with a shell avoidance hole at a position corresponding to each of the light panel avoidance holes.

[0009] Optionally, a polarizing plate is fixedly provided on the bottom surface of the elliptical shell, and a polarizing plate avoidance hole is provided at a position of the polarizing plate corresponding to each avoidance hole of the light board.

[0010] Optionally, the distance dimension a between the two shell avoidance holes, the distance dimension b between the two lamp panel avoidance holes, and the distance dimension c between the two vibration plate avoidance holes satisfy the following relationship: a>b>c.

[0011] On the other hand, a dual-camera visual inspection system is provided, comprising:

[0012] Any of the elliptical light source devices;

[0013] Two camera modules, one camera module is correspondingly arranged obliquely above each light board avoidance hole of the elliptical light source device.

[0014] Optionally, the optical axes of the two camera modules are arranged coplanarly.

[0015] Optionally, the plane where the optical axes of the two camera modules are located is a median vertical plane, and the conical light board and the flat light board are both symmetrical structures about the median vertical plane.

[0016] Optionally, the busbar of the conical light panel of the elliptical light source device in the mid-vertical plane is a center busbar, and the center busbar is perpendicular to the optical axis of the corresponding camera module.

[0017] The beneficial effects of the utility model are: providing an elliptical light source device and a dual-camera visual inspection system, when visual inspection is required, a camera module is placed corresponding to each light board avoidance hole, the workpiece to be measured is placed below the elliptical light source device and the dual-camera visual inspection system, the flat light board illuminates the workpiece to be measured vertically downward, and the conical light board illuminates the workpiece to be measured tilted downward, so that the top surface and side surfaces of the workpiece to be measured are illuminated, and the two camera modules obtain image information of the workpiece to be measured tilted downward through the corresponding light board avoidance holes, thereby completing the visual inspection operation of the workpiece to be measured.

[0018] Furthermore, the design of the conical light board gradually increasing in size from top to bottom makes the light emitted by the conical light board match the corresponding optical axis direction of the camera module. The camera module can obtain image information of the workpiece to be measured along the direction of light, which is beneficial to improve the clarity of the image information.

[0019] Therefore, the elliptical light source device and dual-camera visual inspection system provided by the utility model can effectively solve the problem that the existing light source device cannot adapt to two camera modules for lighting operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1A schematic diagram of the structure of a dual-camera visual inspection system provided in an embodiment;

[0022] Figure 2 An exploded schematic diagram of a dual-camera visual inspection system provided in an embodiment;

[0023] Figure 3 A schematic cross-sectional view of a dual-camera visual inspection system provided in an embodiment at the mid-vertical plane.

[0024] In the figure:

[0025] 1. Elliptical light source device;

[0026] 101, cone light panel; 1011, center busbar;

[0027] 102. Flat light board;

[0028] 103. Light board avoidance hole;

[0029] 104. Elliptical shell; 1041. Shell avoidance hole;

[0030] 105, polarizing plate; 1051, vibration plate avoidance hole;

[0031] 2. Camera module; 201. Optical axis; 202. Mid-vertical plane. DETAILED DESCRIPTION

[0032] The reference to "embodiment" in the present invention means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The word "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or association with other embodiments. In principle, in the present invention, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0033] Unless otherwise defined, the technical terms used in this document have the same meanings as those generally understood by those skilled in the art to which the present invention belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit the present invention.

[0034] In the description of the present invention, the term "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist, for example, A and / or B, which means: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this article generally indicates that the objects before and after are in a logical relationship of "or".

[0035] In the present invention, 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 relationship of quantity, priority or sequence between these entities or operations.

[0036] Without further restrictions, in the present invention, the words "include", "comprises", "has" or other similar expressions used in 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 limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0037] Similar to the understanding in the Examination Guidelines, in the present invention, expressions such as "greater than", "less than", "exceed" and the like are understood to exclude the number itself; expressions such as "above", "below", "within" and the like are understood to include the number itself. In addition, in the description of the embodiments of the present invention, "multiple" means more than two (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise clearly and specifically limited.

[0038] In the description of the embodiments of the present invention, 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 invention or facilitating the reader's understanding, and do not indicate or imply that the referred device or component must have a specific position, a specific orientation, or be constructed or operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0039] Unless otherwise expressly specified or limited, in the description of the embodiments of the present utility model, the terms "install", "connect", "connect", "fix", "set" and the like 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 technical field of the present utility model, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to the specific circumstances.

[0040] The utility model provides a dual-camera visual inspection system, which is suitable for application scenarios of visual inspection of workpieces to be inspected, and can effectively solve the problem that the existing light source device cannot adapt to two camera modules for lighting operations.

[0041] See also Figure 1 and Figure 2 In this embodiment, the dual-camera visual inspection system includes an elliptical light source device 1 for illuminating a workpiece to be measured and two camera modules 2 for acquiring image information of the workpiece to be measured.

[0042] The elliptical light source device 1 comprises two conical light boards 101 whose sizes gradually increase from top to bottom, and a flat light board 102 connecting the upper ends of the two conical light boards 101; wherein a light board avoidance hole 103 is provided at the connection position between the flat light board 102 and each of the conical light boards 101. Furthermore, a camera module 2 is correspondingly provided obliquely above each light board avoidance hole 103.

[0043] When visual inspection is required, a camera module 2 is placed at each light board avoidance hole 103, and the workpiece to be measured is placed below the elliptical light source device 1 and the dual-camera visual inspection system. The flat light board 102 illuminates the workpiece to be measured vertically downward, and the conical light board 101 illuminates the workpiece to be measured tilted downward, so that the top and side surfaces of the workpiece to be measured are illuminated. The two camera modules 2 obtain image information of the workpiece to be measured by tilting downward through the corresponding light board avoidance holes 103, thereby completing the visual inspection operation of the workpiece to be measured.

[0044] Furthermore, the design of the conical light board 101 gradually increasing in size from top to bottom makes the light emitted by the conical light board 101 match the corresponding direction of the optical axis 201 of the camera module 2. The camera module 2 can obtain image information of the workpiece to be measured along the direction of illumination, which is beneficial to improving the clarity of the image information.

[0045] Therefore, the elliptical light source device 1 and the dual-camera visual inspection system provided by the present invention can effectively solve the problem that the existing light source device cannot be adapted to two camera modules 2 for lighting operations.

[0046] In this embodiment, the elliptical light source device 1 further includes an elliptical shell 104 , and the flat light board 102 and the two conical light boards 101 are all installed and fixed in the elliptical shell 104 .

[0047] Further, a housing avoidance hole 1041 is provided at the position of the elliptical housing 104 corresponding to each of the lamp board avoidance holes 103. A polarizer 105 is fixedly provided on the bottom surface of the elliptical housing 104, and a vibration piece avoidance hole 1051 is provided at the position of the polarizer 105 corresponding to each of the lamp board avoidance holes 103.

[0048] The camera module 2 sequentially passes through the corresponding housing avoidance hole 1041, the lamp board avoidance hole 103, and the vibration piece avoidance hole 1051 from top to bottom to perform visual inspection on the workpiece to be measured.

[0049] Since the camera module 2 shoots the workpiece to be measured obliquely downward, the housing avoidance holes 1041, the lamp board avoidance holes 103, and the vibration piece avoidance holes 1051 should be gradually centered. Therefore, the distance dimension a between the two housing avoidance holes 1041, the distance dimension b between the two lamp board avoidance holes 103, and the distance dimension c between the two vibration piece avoidance holes 1051 satisfy the following relational expression: a > b > c.

[0050] When the surface of the workpiece to be measured is relatively smooth, the light emitted by the conical lamp board 101 is likely to undergo specular reflection on the surface of the workpiece to be measured. If the camera module 2 is located on the reflection path of the specular reflection, the situation of over-brightness resulting in the failure of visual inspection will occur. In this embodiment, referring to Figure 3 , the optical axes 201 of the two camera modules 2 are arranged in the same plane. Specifically, the plane where the optical axes 201 of the two camera modules 2 are located is denoted as the "mid-perpendicular plane 202", and both the conical lamp board 101 and the planar lamp board 102 are structures symmetric about the mid-perpendicular plane 202. The generatrix of the conical lamp board 101 in the mid-perpendicular plane 202 is the centered generatrix 1011, and the centered generatrix 1011 is perpendicular to the optical axis 201 of the corresponding camera module 2. Such a structural design is beneficial to enabling the optical axis 201 of the camera module 2 to shoot the workpiece to be measured along the light-emitting direction of the conical lamp board 101 as much as possible, avoiding the camera module 2 from entering the reflection path of the specular reflection, and thus avoiding the occurrence of the situation of over-brightness resulting in the failure of visual inspection.

[0051] In summary, the elliptical light source device 1 and the dual-camera vision detection system provided in this embodiment have the following advantages:

[0052] ① When visual inspection is required, a camera module 2 is placed corresponding to each lamp board avoidance hole 103, the workpiece to be measured is placed below the elliptical light source device 1 and the dual-camera vision detection system, the planar lamp board 102 irradiates the workpiece to be measured vertically downward, and the conical lamp board 101 irradiates the workpiece to be measured obliquely downward, so that the top surface and the side surface of the workpiece to be measured are both illuminated. The two camera modules 2 obliquely downward obtain the image information of the workpiece to be measured through the corresponding lamp board avoidance holes 103, and thus the visual inspection operation on the workpiece to be measured can be completed;

[0053] ② The design of the conical light board 101 gradually increasing in size from top to bottom makes the light emitted by the conical light board 101 match the direction of the corresponding optical axis 201 of the camera module 2. The camera module 2 can obtain image information of the workpiece to be measured along the direction of illumination, which is beneficial to improving the clarity of the image information.

[0054] 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 concept 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 elliptical light source device, characterized in that: It comprises two conical light panels (101) whose sizes gradually increase from top to bottom, and a flat light panel (102) connecting the upper ends of the two conical light panels (101); Wherein, a light board avoidance hole (103) is provided at the connection position between the flat light board (102) and each of the conical light boards (101).

2. The elliptical light source device according to claim 1, characterized in that: It also comprises an elliptical shell (104), wherein the flat light panel (102) and the two conical light panels (101) are all installed and fixed in the elliptical shell (104).

3. The elliptical light source device according to claim 2, characterized in that: The elliptical shell (104) is provided with a shell avoidance hole (1041) at a position corresponding to each of the light panel avoidance holes (103).

4. The elliptical light source device according to claim 3, characterized in that: A polarizing plate (105) is fixedly arranged on the bottom surface of the elliptical shell (104), and a polarizing plate avoidance hole (1051) is arranged on the polarizing plate (105) at a position corresponding to each of the light board avoidance holes (103).

5. The elliptical light source device according to claim 4, characterized in that: The distance dimension a between the two housing avoidance holes (1041), the distance dimension b between the two lamp panel avoidance holes (103), and the distance dimension c between the two vibration plate avoidance holes (1051) satisfy the following relationship: a>b>c.

6. A dual-camera visual inspection system, characterized in that: include: The elliptical light source device (1) according to any one of claims 1 to 5; Two camera modules (2), one camera module (2) being arranged correspondingly above each light board avoidance hole (103) of the elliptical light source device (1).

7. The dual-camera visual inspection system according to claim 6, characterized in that: The optical axes (201) of the two camera modules (2) are arranged coplanarly.

8. The dual-camera visual inspection system according to claim 7, characterized in that: The plane on which the optical axes (201) of the two camera modules (2) are located is a mid-vertical plane (202), and both the conical light board (101) and the flat light board (102) are symmetrical structures about the mid-vertical plane (202).

9. The dual-camera visual inspection system according to claim 8, characterized in that: The busbar of the conical light panel (101) of the elliptical light source device (1) in the mid-vertical plane (202) is a central busbar (1011), and the central busbar (1011) and the optical axis (201) of the corresponding camera module (2) are perpendicular to each other.

Images