An appearance inspection device

Abstract

The utility model relates to machine vision detection technical field discloses an appearance detection device, include: imaging device, casing, form the detection hole that can supply the workpiece of waiting for measuring to enter, imaging device is opposite detection hole, the fixed connection of spectrometer prism with casing is used for the side surface image of workpiece of waiting for measuring in detection hole is reflected to imaging device, imaging device with casing opposite fixed. The appearance detection device of the utility model, the cost of overall device is lower.

Description

Technical Field

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

[0002] After production, existing screw parts need to be inspected on their top and outer peripheral surfaces to determine if there are any defects.

[0003] In actual testing, a camera needs to be installed at the top of the testing station, and at least one camera needs to be installed on the side of the testing station. Multiple cameras work together to inspect the surface condition of the workpiece (i.e., screws or other cylindrical workpieces). This testing method requires multiple cameras, which are expensive, resulting in high costs.

[0004] Therefore, it is necessary to design an appearance inspection device with a lower overall cost.

[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 an appearance inspection device with a lower overall cost.

[0007] To achieve the above objectives, this utility model provides the following technical solution: An appearance inspection device, comprising: Imaging devices; The housing forms a detection hole through which the workpiece to be tested can enter, and the imaging device is positioned directly opposite the detection hole; A beam splitter prism, fixedly connected to the housing, is used to reflect the side image of the workpiece to be tested, located in the detection hole, to the imaging device. The imaging device is fixed relative to the housing.

[0008] Optionally, the optical path length of the straight optical path from the top surface of the workpiece to the camera is X, and the optical path length of the L-shaped optical path reflected from the side of the workpiece to the camera through the beam splitter is Y; the beam splitter constitutes an optical path compensation component, making 0.95Y... <X<1.05Y。

[0009] Optionally, the housing includes an annular body, a first arcuate portion mounted on the annular body, and a second arcuate portion mounted on the annular body; A flow channel is formed between the first arc-shaped portion and the second arc-shaped portion, allowing the workpiece to be tested to move laterally into the detection hole.

[0010] Optionally, the first arc-shaped portion is provided with a first arc-shaped slot, and a first arc-shaped diffuser plate is installed in the first arc-shaped slot; the second arc-shaped portion is provided with a second arc-shaped slot, and a second arc-shaped diffuser plate is installed in the second arc-shaped slot. A first light panel is also installed on the first arc-shaped portion, and the light emitted from the first light panel passes through the first arc-shaped diffuser plate and shines onto the inspection hole; a second light panel is also installed on the second arc-shaped portion, and the light emitted from the second light panel passes through the second arc-shaped diffuser plate and shines onto the inspection hole.

[0011] Optionally, the beam splitter is located on the side of the first arc-shaped diffuser plate away from the first lamp plate.

[0012] Optionally, the housing is provided with a mounting groove, and the beam splitter is mounted in the mounting groove.

[0013] Optionally, two beam splitters are provided, and the two beam splitters are spaced apart.

[0014] Optionally, a third slot is provided on the first arc-shaped portion, and the first lamp plate is installed in the third slot; a fourth slot is provided on the second arc-shaped portion, and the second lamp plate is installed in the fourth slot; Both the first and second lamp plates are curved around the center line of the detection hole.

[0015] Optionally, two beam splitters are provided, and the two beam splitters are spaced apart.

[0016] Optionally, the imaging device includes a camera and a lens, the lens being positioned directly opposite the detection aperture.

[0017] Compared with the prior art, the present invention has the following beneficial effects: The appearance inspection device provided by this utility model has a beam splitter prism in the housing. The beam splitter prism can reflect the side image of the workpiece to be tested located in the detection hole to the imaging device. The imaging device can take pictures and detect the top and at least part of the outer peripheral side of the workpiece to be tested at one time, without the need to set up multiple imaging devices, which helps to reduce the cost of the appearance inspection device.

[0018] 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

[0019] 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.

[0020] Figure 1 This is an exploded view of the appearance inspection device provided in this embodiment of the utility model; Figure 2 This is a three-dimensional structural diagram of the appearance inspection device provided in this embodiment of the present invention when the annular main body is hidden; Figure 3 This is a structural schematic diagram of the first arc-shaped portion and the second arc-shaped portion provided in the embodiment of this utility model.

[0021] Reference numerals: 1. Imaging device; 2. Housing; 2001. Mounting groove; 21. Annular body; 22. First arc-shaped part; 221. First arc-shaped slot; 222. Third slot; 23. Second arc-shaped part; 231. Second arc-shaped slot; 232. Fourth slot; 3. Beam splitter prism; 50. Flow channel; 41. First arc-shaped diffuser plate; 42. Second arc-shaped diffuser plate; 51. First lamp plate; 52. Second lamp plate; 100. Workpiece to be measured. Detailed Implementation

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] Unless otherwise explicitly specified or defined, in the description of the embodiments of the present application, the terms "mounting", "connected", "connection", "fixing", "arranging" and other terms shall be understood in a broad sense. For example, the "connection" may be a fixed connection, a detachable connection, or an integrated arrangement; it may be a mechanical connection, an electrical connection, or a communication connection; it may be a direct connection, or an indirect connection through an intermediate medium; it may be the internal communication between two elements or the interaction relationship between two elements. For those skilled in the art to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0031] In view of the above defects existing in the existing appearance detecting device, the applicant, based on years of rich practical experience and professional knowledge engaged in the design and manufacture of such products, and in combination with the application of theory, actively conducts research and innovation, hoping to create a device that can solve the defects in the prior art and make the appearance detecting device more practical. After continuous research and design, and repeated trial production of samples and improvement, the present invention with practical value is finally created.

[0032] Please refer to Figures 1 to 3 , an embodiment of the present invention provides an appearance detecting device, the overall cost of which is lower.

[0033] The appearance detecting device comprises: an imaging device 1; a housing 2 formed with a detecting hole 201 for allowing a workpiece 100 to be detected to enter, the imaging device 1 being facing the detecting hole 201; a light splitting prism 3 fixedly connected to the housing 2, configured to reflect the side image of the workpiece 100 to be detected located in the detecting hole 201 to the imaging device 1; the imaging device 1 is relatively fixed with the housing 2.

[0034] In this embodiment, by defining the relative position of the imaging device 1 and the housing 2, and the light splitting prism 3 is fixedly connected to the housing 2 and can reflect the side image of the workpiece 100 to be detected located in the detecting hole 201 to the imaging device 1, the imaging device 1 can simultaneously detect the top and at least a partial outer peripheral area of the workpiece 100 to be detected in one photographing detection. The appearance detecting device in this embodiment, on one hand, does not require a plurality of imaging devices 1, and on the other hand, the light splitting prism 3 is mounted on the housing 2, thereby being able to detect thin rod-shaped workpieces such as shafts and screws more flexibly and simply.

[0035] Optionally, the optical path of the linear optical path from the top surface of the workpiece 100 to be detected to the camera is X, and the optical path of the L-shaped optical path from the side surface of the workpiece 100 to be detected reflected by the light splitting prism 3 to the camera is Y; the light splitting prism 3 constitutes an optical path compensation component, such that 0.95Y < X < 1.05Y. Preferably, X = Y.

[0036] In this embodiment, the main material of the beam splitter 3 can reduce the optical path, thereby making the optical path of each path as equal as possible. The beam splitter 3 can adjust the optical path between the side of the workpiece and the imaging device 1, so that the side image and the end image of the workpiece are captured by the imaging device 1 at the same time, and ensure that the depth of field of each segment is consistent, resulting in a clearer image.

[0037] Preferably, at least part of the structure of the beam splitter 3 is made of a light-transmitting material with a refractive index of less than 1, or of other materials that can reduce the optical path.

[0038] Optionally, the housing 2 includes an annular body 21, a first arcuate portion 22 mounted on the annular body 21, and a second arcuate portion 23 mounted on the annular body 21; a flow channel 50 is formed between the first arcuate portion 22 and the second arcuate portion 23, allowing the workpiece 100 to be tested to move laterally into the detection hole 201. In this embodiment, the workpiece 100 can enter the detection position along the flow channel 50 and flow out along the flow channel 50 after the detection is completed. The flow of the workpiece 100 is simpler and more convenient.

[0039] Optionally, the first arc-shaped portion 22 is provided with a first arc-shaped slot 221, and a first arc-shaped diffuser plate 41 is installed in the first arc-shaped slot 221; the second arc-shaped portion 23 is provided with a second arc-shaped slot 231, and a second arc-shaped diffuser plate 42 is installed in the second arc-shaped slot 231; a first lamp plate 51 is also installed on the first arc-shaped portion 22, and the light emitted from the first lamp plate 51 passes through the first arc-shaped diffuser plate 1 and shines on the inspection hole; a second lamp plate 52 is also installed on the second arc-shaped portion 23, and the light emitted from the second lamp plate 52 passes through the second arc-shaped diffuser plate 42 and shines on the inspection hole.

[0040] In this embodiment, the first arc-shaped diffuser plate 41 is clamped by the first arc-shaped slot 221, and the second arc-shaped diffuser plate 42 is clamped by the second arc-shaped slot 231. Then, the first lamp plate 51 and the second lamp plate 52 illuminate the workpiece 100 to be tested from both sides, so that the outer periphery of the workpiece 100 to be tested is uniformly illuminated.

[0041] Optionally, the beam splitter 3 is located on the side of the first arc-shaped diffuser plate 41 away from the first lamp plate 51. The beam splitter 3 itself is transparent and will not significantly affect the illumination of the workpiece 100 under test.

[0042] Optionally, the housing 2 is provided with a mounting groove 2001, in which the beam splitter 3 is installed, which can effectively prevent the beam splitter 3 from falling off and improve the fixing effect of the beam splitter 3.

[0043] Optionally, two beam splitters 3 are provided, with the two beam splitters 3 spaced apart, to reflect side images of the workpiece 100 at different positions to the imaging device 1.

[0044] Optionally, a third slot 222 is provided on the first arc-shaped portion 22, and a first lamp plate 51 is installed in the third slot 222; a fourth slot 232 is provided on the second arc-shaped portion 23, and a second lamp plate 52 is installed in the fourth slot 232; both the first lamp plate 51 and the second lamp plate 52 are arc-shaped around the center line of the detection hole 201. The arc-shaped first lamp plate 51 and the second lamp plate 52 can better illuminate the entire outer periphery of the workpiece 100 to be tested.

[0045] Optionally, two beam splitters 3 are provided, with the two beam splitters 3 spaced apart.

[0046] Optionally, the imaging device 1 includes a camera and a lens, with the lens facing the detection aperture 201. The connection structure between the lens and the camera is a conventional structure in the art and will not be described in detail here.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

[0048] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An appearance inspection device, characterized in that, include: Imaging device (1); The housing (2) forms a detection hole (201) through which the workpiece (100) to be tested can enter, and the imaging device (1) is directly facing the detection hole (201). The beam splitter (3) is fixedly connected to the housing (2) and is used to reflect the side image of the workpiece (100) to be tested located in the detection hole (201) to the imaging device (1). The imaging device (1) is fixed relative to the housing (2).

2. The appearance inspection device according to claim 1, characterized in that, The optical path length of the straight optical path from the top surface of the workpiece (100) to the camera is X, and the optical path length of the L-shaped optical path reflected from the side of the workpiece (100) to the camera through the beam splitter (3) is Y; the beam splitter (3) constitutes an optical path compensation component, making 0.95Y <X<1.05Y。 3. The appearance inspection device according to claim 1, characterized in that, The housing (2) includes an annular body (21), a first arcuate portion (22) mounted on the annular body (21), and a second arcuate portion (23) mounted on the annular body (21). A flow channel (50) is formed between the first arc-shaped portion (22) and the second arc-shaped portion (23) to allow the workpiece to be tested (100) to move laterally into the detection hole (201).

4. The appearance inspection device according to claim 3, characterized in that, The first arc-shaped part (22) is provided with a first arc-shaped slot (221), and a first arc-shaped diffuser plate (41) is installed in the first arc-shaped slot (221); the second arc-shaped part (23) is provided with a second arc-shaped slot (231), and a second arc-shaped diffuser plate (42) is installed in the second arc-shaped slot (231). A first lamp plate (51) is also installed on the first arc-shaped part (22), and the light emitted from the first lamp plate (51) passes through the first arc-shaped diffuser plate (41) and shines into the inspection hole; a second lamp plate (52) is also installed on the second arc-shaped part (23), and the light emitted from the second lamp plate (52) passes through the second arc-shaped diffuser plate (42) and shines into the inspection hole.

5. The appearance inspection device according to claim 4, characterized in that, The beam splitter (3) is located on the side of the first arc-shaped diffuser plate (41) away from the first lamp plate (51).

6. The appearance inspection device according to claim 1, characterized in that, The housing (2) is provided with a mounting groove (2001), and the beam splitter (3) is installed in the mounting groove (2001).

7. The appearance inspection device according to claim 1, characterized in that, There are two beam splitters (3), and the two beam splitters (3) are spaced apart.

8. The appearance inspection device according to claim 4, characterized in that, The first arc-shaped portion (22) is provided with a third slot (222), in which the first lamp plate (51) is installed; the second arc-shaped portion (23) is provided with a fourth slot (232), in which the second lamp plate (52) is installed; Both the first lamp plate (51) and the second lamp plate (52) are curved around the center line of the detection hole (201).

9. The appearance inspection device according to claim 1, characterized in that, There are two beam splitters (3), and the two beam splitters (3) are spaced apart.

10. The appearance inspection device according to claim 1, characterized in that, The imaging device (1) includes a camera and a lens, the lens being directly opposite the detection aperture (201).

Images