Combined light source and machine vision detection device
By designing a combined light source, using the combination and switching of multiple light output components and spectroscopy devices, the problem that a single light source cannot adapt to different detection scenarios is solved, and image quality and detection accuracy are improved.
Patent Information
- Application Number
- CN202420538636.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-03-19
AI Technical Summary
In traditional machine vision systems, a single light source cannot provide enough light or the correct angle in different detection scenarios, resulting in poor image quality or inability to accurately detect target objects.
Design a combined light source, including multiple light-emitting components and spectroscopic devices, to adapt to different application scenarios by combining and switching different optical paths.
It realizes the provision of appropriate lighting conditions in different detection scenarios, improves image quality and accuracy of target object detection, and overcomes the limitations of a single light source.
Smart Images
Figure CN222896330U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of machine vision detection, in particular to a combined light source and a machine vision detection device. Background Art
[0002] Machine vision refers to a technology that uses computers and corresponding sensor technology to imitate the human visual system to analyze and process image or video data. With the widespread application of machine vision in various fields, the requirements for light sources are getting higher and higher.
[0003] In the field of machine vision, light source is one of the important components for obtaining image information. However, different detection scenarios usually require light sources of different types, angles or intensities to provide appropriate lighting conditions in order to ensure effective image acquisition and object detection. Traditional machine vision systems often use a single light source to provide illumination. However, in some special scenarios, a single light source cannot provide enough light or the correct angle, resulting in poor image quality or inability to accurately detect the target object; secondly, different objects or surface materials may have different characteristics of light reflection and absorption. Therefore, there are some limitations to single light source detection scenarios. Utility Model Content
[0004] In view of the deficiencies of the prior art, the utility model provides a combined light source and a machine vision detection device to solve the problem that there are some limitations in the detection scene of a single light source in the prior art.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] A combined light source comprises a light source housing, wherein the light source housing is provided with a first window for aligning a measured area and a second window for aligning a shooting device, wherein the first window and the second window are coaxial; and the light source housing is provided with:
[0007] A first light emitting component and a second light emitting component, wherein the first light emitting component comprises a first lamp board for emitting a first light path, a first grating is provided on the light emitting path of the first lamp board, and the first light path is vertically emitted into the measured area via the first grating; the second light emitting component comprises a second lamp board for emitting a second light path, a first diffusion device is provided on the light emitting path of the second lamp board, and the second light path is obliquely emitted into the measured area via the first diffusion device;
[0008] A third light emitting component and a fourth light emitting component, wherein the third light emitting component comprises a third lamp board for emitting a third light path, and a second grating and a focusing rod are sequentially arranged on the light emitting path of the third lamp board; the fourth light emitting component comprises a fourth lamp board for emitting a fourth light path, and a second diffusion device is arranged on the light emitting path of the fourth lamp board; a spectroscopic device is arranged on the overlapping light path section of the third light path and the fourth light path, and the spectroscopic device can be driven to switch to a first position to guide the third light path to enter the measured area, or switch to a second position to guide the fourth light path to enter the measured area.
[0009] Optionally, the first light board is an infrared light board; and the first grating is a lens grating.
[0010] Optionally, two groups of the first light emitting components are provided, and the two groups of the first light emitting components are arranged opposite to each other.
[0011] Optionally, the second light board is an RGB light board, and the first diffusion device has a diffusion plate with a frosted surface.
[0012] Optionally, the third light board is an ultraviolet light board, and the third light board is a linear light board.
[0013] Optionally, the fourth light board is an RGB light board.
[0014] Optionally, an adjustment slot is provided on the light source housing, an adjustment rod is slidably disposed in the adjustment slot, an adjustment knob is rotatably disposed on the adjustment rod, and the adjustment knob is rotationally connected to the light splitting device;
[0015] The adjusting slot, the adjusting rod and the adjusting knob form a lever mechanism, and the adjusting rod can be driven to slide along the adjusting slot to drive the optical splitter to switch between the first position and the second position.
[0016] Optionally, the combined light source further includes:
[0017] A first heat dissipation component, wherein the first heat dissipation component is arranged close to the first light output component;
[0018] A second heat dissipation component, wherein the second heat dissipation component is arranged close to the third light output component;
[0019] A third heat dissipation component is arranged in the middle of the light source housing.
[0020] Optionally, the first heat dissipation component includes a first heat dissipation fan;
[0021] The second heat dissipation component includes a second heat dissipation fan and a first heat dissipation cavity, wherein the first heat dissipation cavity is provided with two first medium inlets and outlets for medium to pass in and out;
[0022] The third heat dissipation component includes a second heat dissipation cavity, and the second heat dissipation cavity is provided with two second medium inlets and outlets for medium to pass in and out.
[0023] The utility model also provides a machine vision detection device, comprising the combined light source as described in any one of the above items.
[0024] Compared with the prior art, the utility model has the following beneficial effects:
[0025] The utility model provides a combined light source and a machine vision detection device, which can adapt to different application scenarios by combining and switching a plurality of light sources, and overcome the limitation problem of the current single light source detection scenario. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0027] Figure 1 A cross-sectional schematic diagram of a combined light source provided by the utility model when applied to a machine vision detection device;
[0028] Figure 2 The utility model provides a schematic diagram of the overall structure of a combined light source.
[0029] In the above figure: 10, light source housing; 101, first window; 102, second window; 21, first light output component; 211, first lamp board; 212, first grating; 22, second light output component; 221, second lamp board; 222, first diffusion device; 23, third light output component; 231, third lamp board; 232, focusing rod; 233, second grating; 24, fourth light output component; 241, fourth lamp board; 242, second diffusion device; 31, first heat dissipation component; 311, first heat dissipation fan; 32, second heat dissipation component; 321, first medium inlet and outlet; 322, second heat dissipation fan; 33, third heat dissipation component; 331, second medium inlet and outlet; 41, adjustment slot; 42, adjustment rod; 43, adjustment knob; 44, spectrometer; 441, mounting frame; 51, shooting device; 52, workpiece to be measured. DETAILED DESCRIPTION
[0030] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0031] In the description of the present utility model, it is to be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a centrally arranged component at the same time.
[0032] In addition, terms such as "long", "short", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention. They do not indicate or imply that the device or component referred to must have this specific direction or operate with a specific direction structure, and should not be understood as a limitation of the present invention.
[0033] In the field of machine vision, light source is one of the important components for obtaining image information. Common light sources include visible light, infrared light, etc., which have different characteristics and advantages in different application scenarios. In order to meet different application requirements, this patent application proposes a solution including UV light source, infrared light source and three-color light source, and sets a specific film layer on the optical path of each light source.
[0034] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.
[0035] Please refer to Figure 1 and Figure 2 The utility model provides a combined light source, including a light source housing 10, on which a first window 101 for aligning a measured area and a second window 102 for aligning a shooting device 51 are opened, wherein the first window 101 and the second window 102 are coaxial.
[0036] It can be understood that the workpiece to be inspected is transmitted to the inspected area through a transmission tool such as a transmission belt, the combined light source irradiates the workpiece to be inspected, and then the workpiece to be inspected 52 is photographed by the photographing device 51 to obtain a detection image containing the surface features of the workpiece to be inspected 52.
[0037] In this embodiment, the light source housing 10 is provided with:
[0038] A first light emitting component 21 and a second light emitting component 22, wherein the first light emitting component 21 comprises a first lamp board 211 for emitting a first light path, a first grating 212 is provided on the light emitting path of the first lamp board 211, and the first light path is vertically emitted into the measured area via the first grating 212; the second light emitting component 22 comprises a second lamp board 221 for emitting a second light path, a first diffuser 222 is provided on the light emitting path of the second lamp board 221, and the second light path is obliquely emitted into the measured area via the first diffuser 222;
[0039] By providing the first light emitting component 21 and the second light emitting component 22, two light paths in different directions or angles are emitted simultaneously in the measured area, thereby providing detection light perpendicular to and inclined to the measured surface, thereby realizing different types of defect detection.
[0040] Furthermore, a third light emitting component 23 and a fourth light emitting component 24 are also provided in the light source housing 10. The third light emitting component 23 includes a third lamp board 231 for emitting a third light path, and a second grating 233 and a focusing rod 232 are sequentially provided on the light emitting path of the third lamp board 231; the fourth light emitting component 24 includes a fourth lamp board 241 for emitting a fourth light path, and a second diffusion device 242 is provided on the light emitting path of the fourth lamp board 241; a spectrometer 44 is provided on the overlapping light path section of the third light path and the fourth light path, and the spectrometer 44 is movably connected to the light source housing 10 through a mounting frame 441; the spectrometer 44 can be driven to switch to the first position to guide the third light path to enter the measured area, or switch to the second position to guide the fourth light path to enter the measured area.
[0041] By providing the third light emitting component 23 and the fourth light emitting component 24, at least two different light paths can be respectively emitted into the measured area to adapt to the optical measurement or lighting task. Among them, a light splitter 44 is provided in the overlapping light path section between the third light path and the fourth light path. By switching the light splitter 44 to different positions, the third light path or the fourth light path is selectively guided to enter the measured area, and different optical paths can be selected for measurement or lighting as needed.
[0042] Based on the aforementioned structure, the combined light source provided by the utility model can realize multiple light paths to enter the measured area, and realize different optical effects and functions by means of light path adjustment and light path separation.
[0043] Furthermore, in this embodiment, the first light board 211 is an infrared light board; and the first grating 212 is a lens grating.
[0044] It is understandable that the lens grating can focus the scattered infrared light to one point, enhance the irradiation intensity and distance of the infrared light board, and at the same time control the infrared light to achieve a specific scattering effect, so that the infrared light board can better adapt to specific lighting needs. In addition, the lens grating can also filter the infrared light within a specific wavelength range, shield or reduce the interference light of other wavelengths, so as to increase the accuracy of recognition and detection of target objects.
[0045] Furthermore, two groups of first light emitting components 21 are provided, and the two groups of first light emitting components 21 are arranged opposite to each other. The two groups of light sources are arranged symmetrically, which can better provide uniform illumination, thereby reducing the interference of factors such as shadows and reflections on image quality and processing results; at the same time, since the stability of the light source is crucial to the performance of the machine vision system, the symmetrically arranged light sources can complement each other and reduce the problems caused by the instability of light from a single light source. In addition, the symmetrical arrangement of the two groups of light sources can reduce or eliminate reflections and shadows, and improve the quality and accuracy of the image.
[0046] Furthermore, the second light board 221 and the fourth light board 241 are both RGB light boards. Specifically, RGB represents the three basic colors of red, green and blue. The RGB light source can provide light of different colors and brightness, and analyzes the reflected light of different colors on the surface of the object to help the machine vision system recognize and distinguish different objects.
[0047] In addition, the first diffusion device 222 has a frosted diffusion plate. In this embodiment, the frosted diffusion plate can diffuse light from a point to a larger area, so that the light can be more evenly irradiated on the observed object. This can avoid the situation where a part of the area is too bright or too dark due to strong light focusing on a certain point, thereby improving the machine vision system's ability to identify and detect objects, and ensuring that the quality of the collected images is more stable and reliable.
[0048] In order to improve assembly efficiency, the first diffusion element 222 and the first grating 212 are an integrated structure.
[0049] Furthermore, the third light board 231 is a UV light board, and the third light board 231 is a linear light board. In the field of machine vision, a linear UV light board can highlight defects, foreign matter or stains on the surface of an object; by using a linear UV light board, high-precision defect detection can be achieved in a machine vision system, such as detecting cracks and scratches on the surface of metal products. In addition, for some special materials, such as glass or plastic, they may experience surface reflection or refraction under conventional light sources, resulting in a decrease in image quality, and by using a linear UV light board for irradiation, these reflections or refractions can be eliminated, making the image easier to process and analyze.
[0050] In summary, in the present invention, a UV light source, an infrared light source and a three-color light source are provided, and a specific film layer is provided on the optical path of the light source to enhance the output effect of the light source and improve the accuracy and quality of image acquisition and processing.
[0051] In this embodiment, an adjustment slot 41 is provided on the light source housing 10, an adjustment rod 42 is slidably provided in the adjustment slot 41, an adjustment knob 43 is rotatably provided on the adjustment rod 42, and the adjustment knob 43 is rotatably connected to the spectrometer 44; the adjustment slot 41, the adjustment rod 42 and the adjustment knob 43 form a lever mechanism, and the adjustment rod 42 can be driven to slide along the adjustment slot 41 to drive the spectrometer 44 to switch between the first position and the second position.
[0052] The design principle of the lever mechanism is to generate amplification or reduction of force at the other end through the action of force under the action of a fixed fulcrum. In this embodiment, the adjusting knob 43 provides a driving force, and the lever mechanism converts the rotation force of the adjusting knob 43 into a force for the adjusting rod 42 to slide in the adjusting slot 41. The adjusting rod 42 slides in the adjusting slot 41, so that the light splitting device 44 switches between different positions, thereby realizing the switching of the third light emitting component 23 and the fourth light emitting component 24.
[0053] In this embodiment, the combined light source further includes:
[0054] A first heat dissipation component 31, wherein the first heat dissipation component 31 is disposed close to the first light output component 21;
[0055] A second heat dissipation component 32, the second heat dissipation component 32 is arranged close to the third light output component 23;
[0056] The third heat dissipation component 33 is disposed in the middle of the light source housing 10 .
[0057] The first heat dissipation component 31 includes a first heat dissipation fan 311; the function of the heat dissipation fan is to discharge heat from the detection device through wind. Placing the first heat dissipation component 31 near the first light output component 21 can effectively take away the heat generated by the first light output component 21 and reduce the temperature of the detection device.
[0058] The second heat dissipation component 32 includes a second heat dissipation fan 322 and a first heat dissipation cavity, and the first heat dissipation cavity is provided with two first medium inlets and outlets 321 for medium to pass in and out. Based on this, heat can be transferred from the third light output component 23 to the second heat dissipation cavity, and then discharged through the heat dissipation fan. Such a design effectively reduces the influence of the heat generated by the third light output component 23 on the overall detection device.
[0059] The third heat dissipation component 33 includes a second heat dissipation cavity, which is provided with two second medium inlets and outlets 331 for medium to pass in and out. The third heat dissipation component 33 can provide additional heat dissipation support at the center of the light source to ensure the overall heat dissipation balance of the light source.
[0060] Based on the above embodiments, the utility model further provides a machine vision inspection device, including any of the above combined light sources, and also including a shooting device 51 set to be aligned with the second window 102. The inspection workpiece is transmitted to the inspection area through a transmission tool such as a transmission belt, the combined light source is irradiated on the inspection workpiece, and then the inspection workpiece 52 is photographed by the shooting device 51 to obtain an inspection image containing the surface features of the inspection workpiece 52.
[0061] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.
Claims
1. A combined light source, characterized in that: The light source housing (10) comprises a first window (101) for aligning a measured area and a second window (102) for aligning a photographing device (51), wherein the first window (101) and the second window (102) are coaxial; the light source housing (10) is provided with: A first light emitting component (21) and a second light emitting component (22), wherein the first light emitting component (21) comprises a first lamp board (211) for emitting a first light path, a first grating (212) is provided on the light emitting path of the first lamp board (211), and the first light path is vertically emitted into the measured area via the first grating (212); and the second light emitting component (22) comprises a second lamp board (221) for emitting a second light path, a first diffusion device (222) is provided on the light emitting path of the second lamp board (221), and the second light path is obliquely emitted into the measured area via the first diffusion device (222); A third light emitting component (23) and a fourth light emitting component (24), wherein the third light emitting component (23) comprises a third lamp board (231) for emitting a third light path, and a second grating (233) and a focusing rod (232) are sequentially arranged on the light emitting path of the third lamp board (231); the fourth light emitting component (24) comprises a fourth lamp board (241) for emitting a fourth light path, and a second diffusion device (242) is arranged on the light emitting path of the fourth lamp board (241); a light splitting device (44) is arranged on the overlapping light path section of the third light path and the fourth light path, and the light splitting device (44) can be driven to switch to a first position to guide the third light path to enter the measured area, or switch to a second position to guide the fourth light path to enter the measured area.
2. The combined light source according to claim 1, characterized in that: The first light board (211) is an infrared light board; the first grating (212) is a lens grating.
3. The combined light source according to claim 1 or 2, characterized in that: The first light emitting components (21) are provided in two groups, and the two groups of the first light emitting components (21) are arranged opposite to each other.
4. The combined light source according to claim 1, characterized in that: The second light board (221) is an RGB light board, and the first diffusion device (222) comprises a diffusion board with a frosted surface.
5. The combined light source according to claim 1, characterized in that: The third lamp board (231) is an ultraviolet lamp board, and the third lamp board (231) is a linear lamp board.
6. The combined light source according to claim 1, characterized in that: The fourth light board (241) is an RGB light board.
7. The combined light source according to claim 1, characterized in that: The light source housing (10) is provided with an adjustment slot (41), an adjustment rod (42) is slidably disposed in the adjustment slot (41), an adjustment knob (43) is rotatably disposed on the adjustment rod (42), and the adjustment knob (43) is rotatably connected to the light splitting device (44); The adjustment slot (41), the adjustment rod (42) and the adjustment knob (43) form a lever mechanism, and the adjustment rod (42) can be driven to slide along the adjustment slot (41) to drive the optical splitter (44) to switch between the first position and the second position.
8. The combined light source according to claim 1, characterized in that: Also includes: A first heat dissipation component (31), the first heat dissipation component (31) being arranged close to the first light output component (21); A second heat dissipation component (32), the second heat dissipation component (32) being arranged close to the third light output component (23); A third heat dissipation component (33), the third heat dissipation component (33) being arranged in the middle of the light source housing (10).
9. The combined light source according to claim 8, characterized in that: The first heat dissipation component (31) comprises a first heat dissipation fan (311); The second heat dissipation component (32) comprises a second heat dissipation fan (322) and a first heat dissipation cavity, wherein the first heat dissipation cavity is provided with two first medium inlets and outlets (321) for medium to enter and exit; The third heat dissipation component (33) comprises a second heat dissipation cavity, and the second heat dissipation cavity is provided with two second medium inlets and outlets (331) for medium to pass in and out.
10. A machine vision inspection device, characterized in that: Comprising the combined light source as claimed in any one of claims 1 to 9.