Visual inspection device

Abstract

The utility model relates to the field of machine vision detection, and discloses a vision detection device which comprises a backlight source and two bent arms, one end of each bent arm is connected with a shell of the backlight source, and the two bent arms are symmetrically arranged relative to the backlight source; the backlight source and the two bent arms form a C-shaped structure, at least two point light sources are arranged on each bent arm at intervals, and the backlight source and the point light sources can emit light to a workpiece to be detected entering the C-shaped structure. The visual inspection device can highlight the appearance of the workpiece to be detected and the surface defects of the workpiece to be detected at the same time, so that the detection camera can detect the appearance of the workpiece to be detected and the surface defects of the workpiece to be detected at the same time, and the detection efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of machine vision inspection, and in particular to a vision inspection device. Background Technology

[0002] Machine vision uses machines to replace human eyes for measurement and judgment. It involves taking pictures of the target with a camera and then transmitting the pictures to a dedicated image processing system. The image processing system converts the pixel distribution, brightness, color and other information in the picture into digital signals to detect whether there are defects in the workpiece.

[0003] Current visual inspection devices use backlighting to highlight the shape of the workpiece under test, allowing the camera to capture the shape and detect defects. However, this method has the following drawback: the side of the workpiece furthest from the backlight is not illuminated, thus only the outer perimeter can be detected, making it difficult to detect surface defects.

[0004] Therefore, it is necessary to design a visual inspection device that can simultaneously highlight the shape and surface defects of the workpiece under test, so that the inspection camera can simultaneously detect the shape and surface defects of the workpiece under test.

[0005] The above information is provided as background information only to aid in understanding this disclosure and does not constitute an assertion or admission that any of the above content can be used as prior art relative to this disclosure. Utility Model Content

[0006] This invention provides a visual inspection device that can simultaneously highlight the shape of the workpiece and its surface defects, thereby enabling the inspection camera to simultaneously detect both the shape and surface defects of the workpiece.

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

[0008] A visual inspection device includes a backlight source and two curved arms;

[0009] One end of the curved arm is connected to the housing of the backlight source, and the two curved arms are symmetrically arranged about the backlight source.

[0010] The backlight source and the two curved arms form a C-shaped structure. Each curved arm is provided with at least two point light sources at intervals. Both the backlight source and the point light sources can emit light to the workpiece to be tested that enters the C-shaped structure.

[0011] Optionally, the C-shaped structure has a side opening that allows the workpiece to be tested to enter;

[0012] The side opening is formed between the end of one of the curved arms away from the backlight source and the end of the other curved arm away from the backlight source.

[0013] Optionally, the curved arm is provided with a through mounting hole, and the point light source is installed in the mounting hole;

[0014] The point light source includes a first cylindrical portion extending into a mounting hole and a second cylindrical portion communicating with the first cylindrical portion, wherein the diameter of the second cylindrical portion is larger than the diameter of the first cylindrical portion.

[0015] Optionally, a lamp bead and a first condenser lens are installed in the second cylindrical portion, and a second condenser lens is installed in the first cylindrical portion;

[0016] The center lines of the first condenser lens and the second condenser lens in the same point light source coincide.

[0017] Optionally, the end of the second cylindrical portion is positioned to fit against the outer side of the bent arm.

[0018] Optionally, the backlight source includes a backlight housing, a backlight lamp panel installed in the backlight housing, and a diffuser plate installed on the light-emitting side of the backlight lamp panel;

[0019] The diffuser plate is fixedly connected to the backlight housing.

[0020] Optionally, the point light source can be detachably mounted on the curved arm.

[0021] Optionally, the curved arm is provided with a strip-shaped groove, and the outer wall of the point light source is attached to the groove wall of the strip-shaped groove.

[0022] Optionally, the inner side of the curved arm near the other curved arm is a diffuse reflective surface.

[0023] Optionally, the visual inspection device also includes an inspection camera mounted on one side of the backlight source.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The visual inspection device provided by this utility model highlights the outer periphery shape of the workpiece under test through a backlight source. The curved arm, backlight source, and curved arm form a C-shaped structure, so that the point light source on the curved arm can illuminate the entire outer periphery of the workpiece under test. With the cooperation of the backlight source and multiple point light sources, the outer periphery shape of the workpiece under test can be well highlighted and the outer periphery surface of the workpiece under test can be well illuminated. This allows the camera to simultaneously detect the shape of the workpiece under test and the surface defects of the workpiece under test, effectively improving the inspection efficiency.

[0026] 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

[0027] 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.

[0028] Figure 1 This is a cross-sectional structural schematic diagram of the visual inspection device provided in this embodiment of the utility model.

[0029] Figure 2 This is a side view schematic diagram of the visual inspection device provided in an embodiment of this utility model.

[0030] Reference numerals: 1. Backlight source; 11. Backlight housing; 12. Backlight panel; 13. Diffuser plate; 101. Side opening; 2. Bent arm; 3. Point light source; 31. First cylindrical part; 32. Second cylindrical part; 301. Lamp bead; 302. First condenser lens; 303. Second condenser lens. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] In view of the aforementioned deficiencies in existing visual inspection 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 visual inspection device more practical. After continuous research, design, and repeated prototype production and improvement, this utility model with real practical value has finally been created.

[0041] Please refer to Figure 1 and Figure 2 This utility model provides a visual inspection device, including a backlight source 1 and two curved arms 2. One end of each curved arm 2 is connected to the housing of the backlight source 1, and the two curved arms 2 are symmetrically arranged about the backlight source 1. The backlight source 1 and the two curved arms 2 form a C-shaped structure, and at least two point light sources 3 are spaced apart on each curved arm 2. Both the backlight source 1 and the point light sources 3 can emit light towards the workpiece to be tested that enters the C-shaped structure. Preferably, four point light sources 3 are spaced apart on each curved arm 2.

[0042] The visual inspection device in this embodiment highlights the outer periphery of the workpiece under test through a backlight source 1, and forms a C-shaped structure through the curved arm 2, the backlight source 1, and the curved arm 2, so that the point light source 3 on the curved arm 2 can illuminate the entire outer periphery of the workpiece under test. With the cooperation of the backlight source 1 and multiple point light sources 3, the outer periphery of the workpiece under test can be well highlighted and the outer periphery surface of the workpiece under test can be well illuminated, so that the camera can simultaneously detect the shape of the workpiece under test and the surface defects of the workpiece under test in one shot, effectively improving the inspection efficiency.

[0043] In this embodiment, the two detection processes of workpiece shape detection and workpiece surface detection are combined into one detection process, which can effectively improve detection efficiency and reduce the footprint of the detection device, thus reducing the overall volume of the detection device.

[0044] Optionally, the C-shaped structure has a side opening 101 for the workpiece to be tested to enter; the side opening 101 is formed between the end of one curved arm 2 away from the backlight source 1 and the end of the other curved arm 2 away from the backlight source 1. The side opening 101 allows the workpiece to be tested to enter and exit horizontally along it, making the movement of the workpiece in and out more convenient and simple. The workpiece to be tested can be horizontally conveyed by a conveyor belt. After being conveyed to the set detection position, the workpiece stays for a set time and then continues to be conveyed forward. Generally, the width of the conveyor belt is not greater than the width of the workpiece to be tested to avoid significant interference.

[0045] Optionally, the curved arm 2 is provided with a through mounting hole, and the point light source 3 is installed in the mounting hole; the point light source 3 includes a first cylindrical part 31 extending into the mounting hole and a second cylindrical part 32 communicating with the first cylindrical part 31, the diameter of the second cylindrical part 32 being larger than the diameter of the first cylindrical part 31.

[0046] In this embodiment, the point light source 3 can be installed simply by inserting the first cylindrical part 31 into the mounting hole. The second cylindrical part 32 serves as a positioning stop, further simplifying the installation of the point light source 3.

[0047] Optionally, an LED 301 and a first condenser lens 302 are installed in the second cylindrical portion 32, and a second condenser lens 303 is installed in the first cylindrical portion 31; the center lines of the first condenser lens 302 and the second condenser lens 303 coincide in the same point light source 3. In this embodiment, installing both the first condenser lens 302 and the LED 301 in the second cylindrical portion 32 makes better use of the space in the second cylindrical portion 32, while installing the second condenser lens 303 in the first cylindrical portion 31 effectively reduces the volume of the point light source 3. In this embodiment, the light emitted from the LED 301 passes sequentially through the first condenser lens 302 and the second condenser lens 303 and is directed towards the workpiece to be measured.

[0048] Optionally, the end of the second cylindrical portion 32 is positioned to fit against the outer side of the curved arm 2, further improving the ease of installation of the point light source 3.

[0049] Optionally, the backlight source 1 includes a backlight housing 11, a backlight lamp board 12 installed in the backlight housing 11, and a diffuser plate 13 installed on the light-emitting side of the backlight lamp board 12; the diffuser plate 13 is fixedly connected to the backlight housing 11. The light emitted from the backlight lamp board 12 passes through the diffuser plate 13 and is directed toward the workpiece to be measured, thereby forming a backlight.

[0050] Optionally, the point light source 3 can be detachably mounted on the curved arm 2, so that it can be easily replaced if the point light source 3 is damaged.

[0051] Optionally, a strip-shaped groove is provided on the curved arm 2, and the outer wall of the point light source 3 fits into the groove wall. In this embodiment, the strip-shaped groove can directly limit the point light source 3, allowing for a direct observation of the installation position of the point light source 3, and reducing the installation difficulty of the point light source 3.

[0052] Optionally, the inner side of the curved arm 2 near the other curved arm 2 is a diffuse reflective surface. The diffuse reflective surface reflects the light from the point light source 3, thereby reflecting the light onto the surface of the workpiece to be tested, further illuminating the surface of the workpiece to be tested.

[0053] Optionally, the visual inspection device also includes an inspection camera mounted on one side of the backlight source 1. The inspection camera, not shown, is used to take pictures of the workpiece to be inspected.

[0054] In summary, the visual inspection device in this embodiment highlights the outer periphery of the workpiece under test through the backlight source 1, and forms a C-shaped structure through the curved arm 2, the backlight source 1, and the curved arm 2, so that the point light source 3 on the curved arm 2 can illuminate the entire outer periphery of the workpiece under test, which can effectively improve the illumination of the workpiece under test, facilitate the detection of the outer periphery surface and surface defects of the workpiece under test, and the top surface, outer periphery surface and ground surface of the workpiece under test can be well illuminated.

[0055] 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 source (1) and two curved arms (2); One end of the curved arm (2) is connected to the housing of the backlight source (1), and the two curved arms (2) are symmetrically arranged about the backlight source (1); The backlight source (1) and the two curved arms (2) form a C-shaped structure. Each curved arm (2) is provided with at least two point light sources (3) spaced apart. Both the backlight source (1) and the point light sources (3) can emit light to the workpiece to be tested that enters the C-shaped structure.

2. The visual inspection device according to claim 1, characterized in that, The C-shaped structure has a side opening (101) that allows the workpiece to be tested to enter; The side opening (101) is formed between the end of one of the curved arms (2) away from the backlight source (1) and the end of the other curved arm (2) away from the backlight source (1).

3. The visual inspection device according to claim 1, characterized in that, The curved arm (2) is provided with a through mounting hole, and the point light source (3) is installed in the mounting hole; The point light source (3) includes a first cylindrical part (31) extending into the mounting hole and a second cylindrical part (32) communicating with the first cylindrical part (31), wherein the diameter of the second cylindrical part (32) is greater than the diameter of the first cylindrical part (31).

4. The visual inspection device according to claim 3, characterized in that, The second cylindrical part (32) is equipped with a lamp bead (301) and a first condenser lens (302), and the first cylindrical part (31) is equipped with a second condenser lens (303); The center lines of the first condenser lens (302) and the second condenser lens (303) in the same point light source (3) coincide.

5. The visual inspection device according to claim 4, characterized in that, The end of the second cylindrical part (32) is positioned to fit against the outer side of the bent arm (2).

6. The visual inspection device according to claim 1, characterized in that, The backlight source (1) includes a backlight housing (11), a backlight lamp plate (12) installed in the backlight housing (11), and a diffuser plate (13) installed on the light-emitting side of the backlight lamp plate (12); The diffuser plate (13) is fixedly connected to the backlight housing (11).

7. The visual inspection device according to claim 1, characterized in that, The point light source (3) can be detachably mounted on the curved arm (2).

8. The visual inspection device according to claim 1, characterized in that, The curved arm (2) is provided with a strip groove, and the outer wall of the point light source (3) is attached to the groove wall of the strip groove.

9. The visual inspection device according to claim 1, characterized in that, The inner side of the curved arm (2) near the other curved arm (2) is a diffuse reflective surface.

10. The visual inspection device according to claim 1, characterized in that, It also includes a detection camera installed on one side of the backlight source (1).

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