Visual inspection device and production line

Abstract

The invention relates to the field of machine vision detection, and discloses a vision detection device and a production line, and the vision detection device comprises a backlight device and an image detection device for photographing and detecting a to-be-detected workpiece; the backlight device comprises a fluorescent film and a light-emitting assembly, the fluorescent film is arranged on the back of a to-be-detected workpiece, and the light-emitting assembly and the to-be-detected workpiece are located on the same side of the fluorescent film; the image detection device and the light-emitting assembly are located on the same side of the fluorescent film. According to the visual inspection device and the production line, installation of the backlight device can be completed without a deep space, and the adaptability is wider.

Description

Technical Field

[0001] This invention relates to the field of machine vision inspection, and more particularly to a vision inspection device and production line. Background Technology

[0002] Existing backlight devices typically include a glass plate and a light-emitting component mounted on the back of the glass plate. The light-emitting component usually includes a circuit board and LEDs mounted on the circuit board. The LEDs need to be a certain distance away from the glass plate to avoid excessive heat causing glass deformation. In addition, a cooling device is usually required to cool the circuit board. This structure requires a relatively deep installation space, making it impossible to accommodate the backlight device in some narrow locations.

[0003] Therefore, it is necessary to design a visual inspection device and production line that can complete the installation of backlight devices without requiring a large installation space.

[0004] 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. Summary of the Invention

[0005] This invention provides a visual inspection device and production line that can complete the installation of backlight devices without requiring a large installation space.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A visual inspection device includes a backlight device and an image inspection device for photographing and inspecting a workpiece under test; The backlight device includes a fluorescent film and a light-emitting component. The fluorescent film is disposed on the back of the workpiece to be tested, and the light-emitting component and the workpiece to be tested are located on the same side of the fluorescent film. The image detection device and the light-emitting component are located on the same side of the fluorescent film.

[0007] Optionally, the vision inspection device also includes a conveyor belt for transporting the workpiece to be inspected; The conveyor belt is located between the fluorescent film and the image detection device.

[0008] Optionally, the fluorescent film is planar or curved.

[0009] Optionally, the light-emitting component emits light at an angle toward the fluorescent film, and the lens of the image detection device is tilted. The light-emitting component and the image detection device are located on opposite sides of the workpiece to be tested. When the image detection device takes a picture of the workpiece to be tested, the position of the projected shadow of the workpiece to be tested is separated from the edge of the workpiece to be tested.

[0010] Optionally, the fluorescent film is spherically curved, with the convex surface of the fluorescent film facing the image detection device; The backlight device also includes a support plate, and the outer periphery of the fluorescent film is pasted on the surface of the support plate, forming an air-filled cavity between the film and the support plate. The support plate has an inflation hole and an exhaust hole that connect to the inflation chamber.

[0011] Optionally, the light-emitting component is a blue light source; The blue light emitted from the blue light source shines on the fluorescent film, and the fluorescent film absorbs the blue light and emits white light.

[0012] Optionally, the light-emitting component includes a housing, a circuit board mounted in the housing, and an array of light-emitting LEDs mounted on the circuit board; All of the aforementioned LED beads are arranged in a rectangular array.

[0013] Optionally, the image detection device includes a camera and a lens.

[0014] Optionally, the conveyor belt is a transparent belt.

[0015] A production line comprising the visual inspection device as described in any of the preceding claims.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The visual inspection device and production line provided by this invention, through a clever structural design, uses a fluorescent film as a backlighting element, and the light-emitting component can illuminate the fluorescent film to make it emit light. The light-emitting component and the image detection device are located on the same side of the fluorescent film. Therefore, the backlighting device can be installed only in a space large enough to accommodate the fluorescent film, with very low requirements for installation depth. In summary, the visual inspection device and production line in this embodiment can complete the installation of the backlighting device without requiring a deep installation space.

[0017] The present invention has other features and advantages, which 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 the invention. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a three-dimensional position diagram of the visual inspection device provided in an embodiment of the present invention; Figure 2 This is a top view schematic diagram of the visual inspection device provided in an embodiment of the present invention; Figure 3 yes Figure 2 A frontal view of the visual inspection device; Figure 4 This is a three-dimensional structural schematic diagram of the light-emitting component provided in an embodiment of the present invention; Figure 5 This is a three-dimensional structural schematic diagram of another visual inspection device provided in an embodiment of the present invention.

[0020] Reference numerals: 101, workpiece to be tested; 1, backlight device; 11, fluorescent film; 12, light-emitting component; 121, housing; 122, circuit board; 123, light-emitting lamp bead; 2, image detection device; 21, camera; 22, lens; 3, support plate; 301, air chamber; 31, air inlet; 32, exhaust port. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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 between these entities or operations.

[0026] 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.

[0027] As understood 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.

[0028] 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.

[0029] 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.

[0030] Example 1 In view of the shortcomings of existing backlight devices, the applicant, based on years of practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theoretical principles, actively researched and innovated, hoping to create a solution to the shortcomings of existing technologies and make the visual inspection device more practical. After continuous research, design, and repeated prototype production and improvement, this invention with real practical value was finally created.

[0031] Please refer to Figures 1 to 4 This invention provides a visual inspection device, including a backlight device 1 and an image inspection device 2 for taking pictures of the workpiece 101 to be inspected; the image inspection device 2 can take pictures of the workpiece 101 to be inspected, thereby detecting surface defects of the workpiece 101.

[0032] The backlight device 1 includes a fluorescent film 11 and a light-emitting component 12. The fluorescent film 11 is disposed on the back of the workpiece 101 to be tested, and the light-emitting component 12 and the workpiece 101 to be tested are located on the same side of the fluorescent film 11. The image detection device 2 is located on the same side of the fluorescent film 11 as the light-emitting component 12.

[0033] In this embodiment, the visual inspection device cleverly uses a structural design to make the fluorescent film 11 a backlighting element, and the light-emitting component 12 can illuminate the fluorescent film 11 to make it emit light. The light-emitting component 12 and the image detection device 2 are located on the same side of the fluorescent film 11. Therefore, the backlighting device 2 can be installed in a space that can accommodate the fluorescent film 11, and the depth requirement for the installation space of the backlighting device 2 is very low. In summary, the visual inspection device and production line in this embodiment can complete the installation of the backlighting device without requiring a deep installation space.

[0034] It should also be noted that after the workpiece 101 is inspected, it will be moved out of the inspection station. At this time, the light-emitting component 12 will directly illuminate the fluorescent film 11 corresponding to the inspection station. Even if another workpiece 101 enters the inspection station, the back of the inspection station will always remain illuminated, without affecting the normal inspection of the image inspection device 2. Optionally, when the light-emitting component 12 illuminates the side of the workpiece 101 near the light-emitting component 12, the image inspection device 2 will take a picture of the workpiece 101. In this case, the light-emitting component 12 plays two key roles: first, illuminating the workpiece 101; and second, illuminating the fluorescent film 11 to make the fluorescent film 11 a backlight. Of course, the light-emitting component 12 may not emit light during inspection.

[0035] Optionally, the vision inspection device also includes a conveyor belt for transporting the workpiece 101 to be inspected; the conveyor belt is located between the fluorescent film 11 and the image inspection device 2. The conveyor belt can continuously transport multiple workpieces 101 to be inspected that are separated from each other, thereby achieving assembly line inspection and improving inspection efficiency.

[0036] Optionally, the fluorescent film 11 can be planar or curved. To match the detection needs of different workpieces 101, the fluorescent film 11 can be reasonably set to different shapes, thereby changing the backlight effect and improving the detection accuracy. Generally, the fluorescent film 11 is planar, which results in better illumination uniformity. When the fluorescent film 11 is curved, it helps to highlight the shape of one side of the workpiece 101.

[0037] Optionally, the light-emitting component 12 emits light at an angle toward the fluorescent film 11, and the lens 22 of the image detection device 2 is also tilted; the light-emitting component 12 and the image detection device 2 are located on opposite sides of the workpiece 101 to be tested. It should be noted that when the image detection device 2 takes a picture of the workpiece 101, the position of the projected shadow of the workpiece 101 is separated from the edge of the workpiece 101. The separated position is the position where the fluorescent film 11 can emit light normally, which can effectively reduce the detection error caused by the dimness of the projected shadow position. The separated position is the normal light-emitting position, and the light emission brightness remains constant.

[0038] Optionally, the fluorescent film 11 is spherically curved, with its convex surface facing the image detection device 2. The backlight device 1 also includes a supporting plate 3, the outer periphery of which is adhered to the surface of the supporting plate 3, forming an inflation cavity 301. The supporting plate 3 has an inflation hole 31 and an exhaust hole 32 communicating with the inflation cavity 301. It should be noted that gas of appropriate pressure can be injected as needed, thereby making the fluorescent film 11 partially spherical or hemispherical, etc. It should also be noted that the exhaust hole 32 can discharge gas, thus preventing damage to the fluorescent film 11 due to excessive pressure. Preferably, an air pressure detection device is provided inside the inflation cavity 301, electrically connected to the inflation device communicating with the inflation hole 31, and electrically connected to an electric exhaust valve installed in the exhaust hole 32, thereby achieving automatic air pressure adjustment. The fluorescent film 11 is preferably an elastically deformable film layer.

[0039] Optionally, the light-emitting component 12 is a blue light source; the blue light emitted by the blue light source shines on the fluorescent film 11, and the fluorescent film 11 absorbs the blue light and emits white light.

[0040] Optionally, the light-emitting component 12 includes a housing 121, a circuit board 122 mounted in the housing 121, and an array of light-emitting LED beads 123 mounted on the circuit board 122; all the light-emitting LED beads 123 are arranged in a rectangular array.

[0041] Optionally, the image detection device 2 includes a camera 21 and a lens 22. The mounting structure of the camera 21 and the lens 22 is an existing structure, and therefore will not be described in detail.

[0042] Optionally, the conveyor belt is a transparent belt.

[0043] Example 2 This embodiment discloses a production line, including the visual inspection device as described in Embodiment 1.

[0044] 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 device, characterized in that, It includes a backlight device (1) and an image detection device (2) for taking pictures of the workpiece (101) to be tested. The backlight device (1) includes a fluorescent film (11) and a light-emitting component (12). The fluorescent film (11) is disposed on the back of the workpiece (101) to be tested, and the light-emitting component (12) and the workpiece (101) to be tested are located on the same side of the fluorescent film (11). The image detection device (2) and the light-emitting component (12) are located on the same side of the fluorescent film (11).

2. The visual inspection device according to claim 1, characterized in that, It also includes a conveyor belt for transporting the workpiece (101) to be tested; The conveyor belt is located between the fluorescent film (11) and the image detection device (2).

3. The visual inspection device according to claim 1, characterized in that, The fluorescent film (11) is planar or curved.

4. The visual inspection device according to claim 1, characterized in that, The light-emitting component (12) emits light at an angle toward the fluorescent film (11), and the lens (22) of the image detection device (2) is tilted. The light-emitting component (12) and the image detection device (2) are located on opposite sides of the workpiece to be tested (101). When the image detection device (2) takes a picture of the workpiece to be tested (101), the position of the shadow of the workpiece to be tested (101) is separated from the edge of the workpiece to be tested (101).

5. The visual inspection device according to claim 1, characterized in that, The fluorescent film (11) is spherically curved, with the convex surface of the fluorescent film (11) facing the image detection device (2). The backlight device (1) also includes a support plate (3), the outer periphery of the fluorescent film (11) is pasted on the plate surface of the support plate (3), and an air-filled cavity (301) is formed between the support plate (3) and the support plate (3). The support plate (3) is provided with an inflation hole (31) that connects to the inflation chamber (301) and an exhaust hole (32) that connects to the inflation chamber (301).

6. The visual inspection device according to claim 1, characterized in that, The light-emitting component (12) is a blue light source; The blue light emitted by the blue light source shines on the fluorescent film (11), and the fluorescent film (11) absorbs the blue light and emits white light.

7. The visual inspection device according to claim 1, characterized in that, The light-emitting component (12) includes a housing (121), a circuit board (122) mounted in the housing (121), and an array of light-emitting LED beads (123) mounted on the circuit board (122). All the aforementioned LED beads (123) are arranged in a rectangular array.

8. The visual inspection device according to claim 1, characterized in that, The image detection device (2) includes a camera (21) and a lens (22).

9. The visual inspection device according to claim 2, characterized in that, The conveyor belt is a transparent belt.

10. A production line, characterized in that, Includes the visual inspection device as described in any one of claims 1 to 9.

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