Visual inspection device

Abstract

The invention relates to the technical field of machine vision detection, and discloses a vision detection device, which comprises a detection bearing plate used for bearing a workpiece; the position adjusting assembly is used for adjusting the position of the detection bearing plate; the imaging device is arranged on one side of the top of the detection bearing plate and used for detecting the workpiece on the detection bearing plate; the light source assembly comprises a first light source, a second light source and a third light source, the first light source and the second light source are arranged on two opposite sides of the imaging device, the third light source is arranged on one side of the bottom of the first light source, the first light source is a point light source, the second light source is a linear light source, and the third light source is a parallel light source; the heights and the inclined light-emitting angles of the first light source, the second light source and the third light source can be adjusted, and the first light source, the second light source and the third light source can be independently turned on and turned off. The application range of the visual detection device is further widened.

Description

Technical Field

[0001] The present invention relates to the technical field of machine vision detection, and in particular to a vision detection device. Background Art

[0002] Machine vision is a rapidly developing branch of artificial intelligence. Simply put, machine vision is to use machines to replace human eyes to make measurements and judgments.

[0003] Existing visual inspection devices generally include a light source, an imaging device and a supporting plate for supporting the workpiece. The positions of the light source and the imaging device to the supporting plate are fixed so that the light can be well irradiated on the workpiece and reflected to the imaging device for imaging. The above-mentioned visual inspection devices can generally only detect workpieces of specific sizes. Once the size, color, shape, etc. of the workpiece changes, it cannot adapt to subsequent inspection needs and is difficult to meet the needs of flexible production.

[0004] In view of this, it is necessary to design a visual inspection device to further expand the application scope of the visual inspection device.

[0005] The above information is presented as background information only to assist with understanding the present disclosure and no determination or admission is made as to whether any of the above may be used as prior art with respect to the present disclosure. Summary of the invention

[0006] The present invention provides a visual inspection device, which further expands the application range of the visual inspection device.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A visual inspection device, comprising:

[0009] Detection bearing plate, used to support the workpiece;

[0010] A position adjustment component, used for adjusting the position of the detection carrier plate;

[0011] An imaging device, arranged on one side of the top of the detection carrier plate, for detecting the workpiece on the detection carrier plate;

[0012] A light source assembly, comprising a first light source and a second light source disposed on opposite sides of the imaging device, and a third light source disposed on one side of the bottom of the first light source, wherein the first light source is a point light source, the second light source is a linear light source, and the third light source is a parallel light source;

[0013] The heights and tilted light output angles of the first light source, the second light source and the third light source are all adjustable, and the first light source, the second light source and the third light source can be turned on and off individually.

[0014] Optionally, the imaging device includes a detection camera and a lens installed at the light output end of the detection camera;

[0015] A first annular light source is installed on one side of the top of the detection carrier plate. The first annular light source is located on one side of the top of the lens and emits light to the detection carrier plate. The height of the first annular light source is adjustable.

[0016] Optionally, a second annular light source is installed on one side of the bottom of the detection carrier plate, and the detection carrier plate is a light-transmitting flat plate;

[0017] The second annular light source is located directly below the first annular light source.

[0018] Optionally, the detection carrier plate is an electrochromic plate.

[0019] Optionally, a positioning bar is provided on the top surface of the detection carrier plate near the end of the first light source;

[0020] A plurality of supporting protrusions for supporting workpieces are also arranged at intervals on the detection bearing plate.

[0021] Optionally, a positioning groove is further provided on the detection supporting plate, and the positioning groove is located between the two supporting protrusions.

[0022] Optionally, the position adjustment component includes an XY-axis slide and a Z-axis slide mounted on the XY-axis slide, and the detection bearing plate is mounted on a table of the Z-axis slide.

[0023] Optionally, the visual inspection device further comprises a horizontal rotation axis;

[0024] A slide groove perpendicular to the horizontal rotation axis is provided at the bottom of the detection carrier plate, a sliding block is slidably installed in the slide groove, and the sliding block is hinged to the table plate of the Z-axis slide table, and one end of the detection carrier plate is rotatably connected to the horizontal rotation axis;

[0025] The XY axis slide is installed on the horizontal support plate, the horizontal rotation axis is parallel to the horizontal support plate, and the horizontal rotation axis is fixedly connected to the horizontal support plate.

[0026] Optionally, a first vertical plate, a second vertical plate and a third vertical plate are installed on the horizontal support plate at intervals;

[0027] The second vertical plate is located between the first vertical plate and the third vertical plate, the first light source and the third light source are both mounted on the first vertical plate, the imaging device is mounted on the second vertical plate, and the second light source is mounted on the third vertical plate.

[0028] Optionally, the imaging device is height adjustable.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] The visual inspection device provided by the present invention is provided with a first light source and a third light source on the left side of the imaging device, and a second light source on the right side of the imaging device. The first light source is a point light source, the second light source is a linear light source, and the third light source is a parallel light source. The heights and inclined light output angles of the first light source, the second light source, and the third light source are all adjustable, so as to provide a better lighting effect for the workpiece on the inspection carrier plate, that is, the positions and angles of the first light source, the second light source, and the third light source are adjusted to provide the best lighting effect for the surface of the workpiece, which can meet the needs of users to detect various surface defects of workpieces and can also facilitate reading of information such as QR codes and bar codes on the product surfaces.

[0031] The present invention has other features and advantages, which will be apparent from or will be described in detail in the accompanying drawings and the following detailed description incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 is a front view schematic diagram of a visual inspection device provided by an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the three-dimensional structure of a visual inspection device provided by an embodiment of the present invention;

[0035] Figure 3 It is a front view schematic diagram of another visual inspection device provided by an embodiment of the present invention.

[0036] Figure numerals: 1. detection carrier plate; 101. sliding block; 11. positioning bar; 12. supporting protrusion; 13. positioning groove; 2. position adjustment assembly; 21. XY-axis slide; 22. Z-axis slide; 3. imaging device; 31. detection camera; 32. lens; 4. light source assembly; 41. first light source; 42. second light source; 43. third light source; 44. first annular light source; 45. second annular light source; 5. horizontal support plate; 51. first vertical plate; 52. second vertical plate; 53. third vertical plate. DETAILED DESCRIPTION

[0037] In order to explain in detail the possible application scenarios, technical principles, specific schemes that can be implemented, and the purposes and effects that can be achieved, the following is a detailed description of the specific embodiments listed in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0038] Reference to "embodiment" herein 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 application. The term "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 application, as long as there is no technical contradiction or conflict, the various technical features mentioned in the embodiments can be combined in any way to form a corresponding implementable technical solution.

[0039] 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 this application belongs; the use of relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0040] In the description of this application, 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 an "or" logical relationship.

[0041] In the present application, 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.

[0042] Without further limitations, in this application, the words "include", "comprises", "has" or other similar expressions used in the 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.

[0043] Similar to the understanding in the Examination Guidelines, in this application, 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 this application, "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.

[0044] In the description of the embodiments of the present application, 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 application 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 application.

[0045] Unless otherwise expressly specified or limited, in the description of the embodiments of the present application, the terms such as "install", "connect", "connect", "fix", "set", etc. 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 it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For technicians in the technical field to which the present application belongs, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0046] In view of the defects of the above-mentioned existing visual inspection devices, the applicant, based on many years of rich practical experience and professional knowledge in the design and manufacture of such products, and in conjunction with the application of theory, actively conducts research and innovation in the hope of creating a technology that can solve the defects in the existing technology and make the visual inspection device more practical. After continuous research and design, and after repeated trial production and improvement, the present invention with real practical value was finally created.

[0047] Please refer to Figure 1 to Figure 2 The embodiment of the present invention provides a visual inspection device, including an inspection carrier plate 1, a position adjustment component 2, an imaging device 3 and a light source component 4. The imaging device 3 can be a CCD camera, a CMOS camera or other types of cameras.

[0048] Among them, the detection carrier plate 1 is used to support the workpiece; the position adjustment component 2 can adjust the position of the detection carrier plate 1, and the position adjustment component 2 can adjust the position of the detection carrier plate 1 in three-dimensional space. The imaging device 3 is arranged on the top side of the detection carrier plate 1, and is used to take pictures of the workpiece, and is used to detect the workpiece on the detection carrier plate 1, so as to identify the surface defects of the workpiece; the light source component 4 includes a first light source 41 and a second light source 42 arranged on opposite sides of the imaging device 3, and a third light source 43 arranged on the bottom side of the first light source 41, the first light source 41 is a point light source, the second light source 42 is a linear light source, and the third light source 43 is a parallel light source; the height and tilted light angle of the first light source 41, the second light source 42, and the third light source 43 are all adjustable, and the first light source 41, the second light source 42, and the third light source 43 can be turned on and off separately.

[0049] The visual inspection device of this embodiment is provided with a first light source 41 and a third light source 43 on the left side of the imaging device 3, and a second light source 42 on the right side of the imaging device 3. The first light source 41 is a point light source, the second light source 42 is a linear light source, and the third light source 43 is a parallel light source. The heights and inclined light output angles of the first light source 41, the second light source 42 and the third light source 43 are all adjustable, so as to provide a better lighting effect for the workpiece on the inspection carrier plate 1, that is, the positions and angles of the first light source 41, the second light source 42 and the third light source 43 are adjusted to provide the best lighting effect for the surface of the workpiece, which can meet the needs of users to detect various surface defects of workpieces and can also facilitate reading of information such as QR codes and bar codes on the surface of products.

[0050] It should be further explained that, for different types of workpieces, the light emitting effects of the first light source 41, the second light source 42 and the third light source 43 need to be adjusted according to actual needs. For example, the first light source 41 and the second light source 42 can be adjusted to a suitable height to tilt the light, while the third light source 43 does not emit light.

[0051] Optionally, the imaging device 3 includes a detection camera 31 and a lens 32 installed at the light output end of the detection camera 31; a first annular light source 44 is installed on the top side of the detection carrier plate 1, the first annular light source 44 is located on the top side of the lens 32 and emits light to the detection carrier plate 1, and the height of the first annular light source 44 is adjustable.

[0052] Specifically, the first annular light source 44 can be controlled to be turned on and off, so as to be arranged and combined with the first light source 41 , the second light source 42 and the third light source 43 to provide more lighting effects.

[0053] Optionally, a second annular light source 45 is installed on one side of the bottom of the detection carrier plate 1 , and the detection carrier plate 1 is a light-transmissive flat plate; the second annular light source 45 is located directly below the first annular light source 44 .

[0054] Specifically, the second annular light source 45 illuminates from the bottom, which can provide a better backlight effect and make the surface edge of the workpiece clearer.

[0055] It should be noted that the arrangement and combination of the first light source 41, the second light source 42, the third light source 43, the first annular light source 44 and the second annular light source 45 can provide five lighting effects when one light source is turned on; can provide ten lighting effects when two light sources are turned on; can provide ten lighting effects when three light sources are turned on; can provide five lighting effects when four light sources are turned on. In addition, by changing the light output angle and light output height, better lighting effects can be provided for different workpieces.

[0056] Optionally, the detection carrier plate 1 is an electrochromic plate. Specifically, the electrochromic plate can be made light-transmissive or light-impermeable according to whether a backlight effect is required, thereby meeting the detection needs of different workpieces.

[0057] Optionally, a positioning bar 11 is provided on the top surface of the detection carrier plate 1 near the end of the first light source 41; a plurality of supporting protrusions 12 for supporting the workpiece are also provided at intervals on the detection carrier plate 1. A larger workpiece is placed on the supporting protrusion 12, and the end thereof contacts the positioning bar 11 to complete the positioning.

[0058] Optionally, a positioning groove 13 is further provided on the detection bearing plate 1, and the positioning groove 13 is located between the two supporting protrusions 12. The positioning groove 13 is used to position a workpiece of a smaller size.

[0059] Optionally, the position adjustment assembly 2 includes an XY-axis slide 21 and a Z-axis slide 22 mounted on the XY-axis slide 21, and the detection carrier plate 1 is mounted on the table of the Z-axis slide 22. The XY-axis slide 21 can drive the Z-axis slide 22 to move along the horizontal plane, thereby adjusting the workpiece to a suitable detection position. The Z-axis slide 22 adjusts the height of the workpiece to be detected, so that it can cooperate with the height adjustment of the first light source 41, the second light source 42 and the third light source 43, so that the workpiece can be subjected to a good lighting effect that is conducive to improving the detection accuracy.

[0060] Alternatively, if Figure 3 The visual inspection device also includes a horizontal rotation axis; a slide groove perpendicular to the horizontal rotation axis is arranged at the bottom of the inspection carrier plate 1, the left end of the inspection carrier plate 1 is fixedly connected to the horizontal rotation axis, a sliding block 101 is slidably installed in the slide groove, and the sliding block 101 is hinged to the table plate of the Z-axis slide 22, and one end of the inspection carrier plate 1 is rotatably connected to the horizontal rotation axis; the XY-axis slide 21 is installed on the horizontal support plate 5, the horizontal rotation axis is parallel to the horizontal support plate 5, and the horizontal rotation axis is fixedly connected to the horizontal support plate 5.

[0061] In this embodiment, the Z-axis slide 22 can make the table rise and fall in the vertical direction, thereby adjusting the inclination angle of the detection carrier plate 1, so that the workpiece is in a more suitable posture for detection. For example, it is necessary to detect surface defects on the side wall of the inner hole of the workpiece, detect the inclination of the inclined groove, etc.

[0062] Optionally, a first vertical plate 51, a second vertical plate 52 and a third vertical plate 53 are installed at intervals on the horizontal support plate 5; the second vertical plate 52 is located between the first vertical plate 51 and the third vertical plate 53, the first light source 41 and the third light source 43 are both installed on the first vertical plate 51, the imaging device 3 is installed on the second vertical plate 52, and the second light source 42 is installed on the third vertical plate 53.

[0063] Specifically, the supports of the first light source 41 and the third light source 43 can be slidably mounted on the first vertical plate 51. After adjusting the height of the supports, the light emitting portion of the first light source 41 can be rotated relative to the supports to adjust the light emitting inclination angle, and the light emitting portion of the third light source 43 can be rotated relative to the supports to adjust the light emitting inclination angle. Similarly, the position adjustment method of the second light source 42 is similar to the position adjustment method of the first light source 41.

[0064] Optionally, the height of the imaging device 3 is adjustable to better focus on workpieces at different heights.

[0065] 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. A visual inspection device, characterized in that: include: A detection bearing plate (1) for supporting a workpiece; A position adjustment component (2) used for adjusting the position of the detection carrier plate (1); An imaging device (3) is arranged on one side of the top of the detection carrier plate (1) and is used to detect the workpiece on the detection carrier plate (1); A light source assembly (4), comprising a first light source (41) and a second light source (42) arranged on opposite sides of the imaging device (3), and a third light source (43) arranged on one side of the bottom of the first light source (41), wherein the first light source (41) is a point light source, the second light source (42) is a linear light source, and the third light source (43) is a parallel light source; The heights and tilted light output angles of the first light source (41), the second light source (42) and the third light source (43) are all adjustable, and the first light source (41), the second light source (42) and the third light source (43) can be turned on and off individually.

2. The visual inspection device according to claim 1, characterized in that: The imaging device (3) comprises a detection camera (31) and a lens (32) installed at the light output end of the detection camera (31); A first annular light source (44) is installed on one side of the top of the detection carrier plate (1); the first annular light source (44) is located on one side of the top of the lens (32) and emits light toward the detection carrier plate (1); and the height of the first annular light source (44) is adjustable.

3. The visual inspection device according to claim 2, characterized in that: A second annular light source (45) is installed on one side of the bottom of the detection carrier plate (1), and the detection carrier plate (1) is a light-transmitting flat plate; The second annular light source (45) is located directly below the first annular light source (44).

4. The visual inspection device according to claim 3, characterized in that: The detection carrier plate (1) is an electrochromic plate.

5. The visual inspection device according to claim 1, characterized in that: A positioning barrier strip (11) is provided on the top surface of the detection carrier plate (1) near the end of the first light source (41); The detection support plate (1) is also provided with a plurality of support protrusions (12) at intervals for supporting workpieces.

6. The visual inspection device according to claim 5, characterized in that: The detection carrier plate (1) is also provided with a positioning groove (13), and the positioning groove (13) is located between the two supporting protrusions (12).

7. The visual inspection device according to claim 1, characterized in that: The position adjustment component (2) comprises an XY-axis slide (21) and a Z-axis slide (22) mounted on the XY-axis slide (21), and the detection carrier plate (1) is mounted on the table of the Z-axis slide (22).

8. The visual inspection device according to claim 7, characterized in that: Also included is a horizontal rotation axis; A slide groove perpendicular to the horizontal rotation axis is provided at the bottom of the detection carrier plate (1), a sliding block (101) is slidably installed in the slide groove, and the sliding block (101) is hinged to the table plate of the Z-axis slide table (22), and one end of the detection carrier plate (1) is rotatably connected to the horizontal rotation axis; The XY-axis slide table (21) is mounted on a horizontal support plate (5), the horizontal rotation axis is parallel to the horizontal support plate (5), and the horizontal rotation axis is fixedly connected to the horizontal support plate (5).

9. The visual inspection device according to claim 8, characterized in that: The horizontal support plate (5) is provided with a first vertical plate (51), a second vertical plate (52) and a third vertical plate (53) installed at intervals; The second vertical plate (52) is located between the first vertical plate (51) and the third vertical plate (53); the first light source (41) and the third light source (43) are both mounted on the first vertical plate (51); the imaging device (3) is mounted on the second vertical plate (52); and the second light source (42) is mounted on the third vertical plate (53).

10. The visual inspection device according to claim 1, characterized in that: The height of the imaging device (3) is adjustable.

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