Multi-point dynamic adjustment type tunnel light source

Abstract

The utility model discloses a multi-point dynamic adjustment type tunnel light source which comprises a working frame, a workpiece positioning unit, a light source assembly and a visual assembly are fixedly arranged on the working frame, and the light source assembly and the visual assembly are located at the positions corresponding to the workpiece positioning unit. The height, the angle and the distance of the two reflecting shells can be adjusted relative to the workpiece, so that the irradiation angle of a light source is adjusted according to different detection requirements and object shapes, the optimal illumination effect is achieved, the visual imaging problem of the metal high-reflection rotary body is solved, and the detection accuracy is improved. According to the invention, a plurality of camera modules can be simultaneously used and X-axis moving working scenes can be handled, and light can be subjected to set reflection and heat dissipation in the reflection cavity, so that a uniform diffuse illumination effect is realized, shadows and light reflection are reduced, a uniform and stable illumination environment is provided for a machine vision system, image information of an object can be accurately acquired, and the visual effect of the machine vision system is improved. And powerful guarantee is provided for machine vision detection.

Description

Technical Field

[0001] This utility model relates to the field of visual inspection technology, and in particular to a multi-point dynamically adjustable tunnel light source. Background Technology

[0002] A machine vision system consists of a camera, a lens, and a light source. The light source illuminates the target object by covering it with a reflective shell. The lens images the object onto the camera's photosensitive element. The camera converts the light signal into an electrical signal to generate a digital image. The computer converts the analog signal output by the camera into a digital signal and preprocesses the image. Then, the image processing software analyzes and processes the acquired image, extracts useful information, and performs functions such as target detection, recognition, and measurement. Finally, the processing results are output to the control system to achieve applications such as automated production and quality inspection.

[0003] Tunnel light sources are a special type of light source in machine vision systems. These sources consist of a high-brightness, high-density, high-power LED array that reflects light uniformly against the curved inner wall of the outer shell. This results in bright, uniform, and soft light from multiple angles, providing unique illumination effects and applications. Traditional tunnel light sources can maintain bright, uniform, and soft illumination from multiple angles, providing good support for machine vision systems. However, they also have significant drawbacks. First, for highly reflective materials (such as mirrors and metals) or complex curved surfaces, the light source is prone to light spot interference and reflection distortion, leading to blurred images or feature loss. Furthermore, due to the reflective shell structure, the light source cannot adapt to the needs of simultaneous multi-camera shooting, making multi-angle collaborative lighting difficult. On the other hand, because the reflective shell and light source use a rigid, fixed structure, the adjustment of the light source position and illumination angle is limited, making it difficult to dynamically optimize the imaging perspective according to different inspection scenarios, thus affecting the complete imaging effect of complex workpieces. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a multi-point dynamically adjustable tunnel light source that is simple in structure, easy to adjust, and can improve lighting quality.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution.

[0006] This application provides a multi-point dynamically adjustable tunnel light source, including a working frame, on which a workpiece positioning unit, a light source component located at the corresponding position of the workpiece positioning unit, and a vision component are fixedly mounted;

[0007] The light source assembly includes:

[0008] The adjustment mechanism is fixedly mounted on the working frame and is detachably connected to two reflective shells, which are symmetrically arranged about a reference plane.

[0009] The reflective shell has a reflective cavity inside that opens toward the workpiece positioning unit, and a light-emitting unit is fixed on the inner wall.

[0010] The vision component includes a fixed plate fixedly mounted on a working frame, a horizontal adjustment rod fixedly mounted on the fixed plate, a plurality of horizontal slides slidably mounted on the horizontal adjustment rod, a vertical adjustment rod fixedly mounted on the horizontal slides, a vertical slide slidably mounted on the vertical adjustment rod, and a camera module fixedly mounted on the vertical slide.

[0011] The two reflective shells can move along the Y-axis direction on the adjustment mechanism, or move synchronously along the Z-axis direction on the adjustment mechanism.

[0012] The lateral adjustment rod extends along the X-axis, the longitudinal adjustment rod extends along the Z-axis, and the reference plane is specifically set to be parallel to the X / Z-axis plane.

[0013] Further specifying, in the above-mentioned multi-point dynamic adjustable tunnel light source, the adjustment mechanism includes a lifting guide rod fixedly mounted on the working frame and extending along the Z-axis direction, a connecting block being movable up and down on the lifting guide rod, and an adjustment plate fixedly mounted on the connecting block being able to be fixedly connected to the reflector shell;

[0014] The adjustment plate has a U-shaped groove running through it in the X-axis direction and the U-shaped groove extends along the Y-axis direction. The reflector shell has a fixing hole on the end face near the adjustment plate. The adjustment plate and the reflector shell can be fixedly connected by bolts through the U-shaped groove and the fixing hole.

[0015] Further defining the above-mentioned multi-point dynamic adjustable tunnel light source, wherein the connecting block is provided with a guide hole and a clamping groove through the Z-axis direction, the guide hole is slidably connected to the lifting guide rod, the inner wall of the clamping groove on the side near the lifting guide rod is connected to the inner wall of the guide hole on the corresponding side, and the inner wall on the side away from the lifting guide rod is connected to the outside of the connecting block;

[0016] The connecting block is also provided with a fastening hole that communicates with the clamping groove, and an adjusting bolt is threaded into the fastening hole;

[0017] When the adjusting bolt is screwed into the fastening hole, it can reduce the gap of the clamping groove to achieve clamping and fixing of the connecting block on the lifting guide rod.

[0018] Further specifying, in the above-mentioned multi-point dynamically adjustable tunnel light source, the workpiece positioning unit is provided with an X-axis adjustment unit, which can adjust the X-axis relative position between the workpiece and the working frame.

[0019] Further specifying, in the aforementioned multi-point dynamically adjustable tunnel light source, the longitudinal slide is provided with an adjustment hole that is slidably connected to the longitudinal adjustment rod along the Z-axis direction.

[0020] Further specifying, in the above-mentioned multi-point dynamic adjustable tunnel light source, a groove is provided through the longitudinal slide table along the Z-axis direction, and the inner wall of the groove near the horizontal slide table communicates with the outside of the longitudinal slide table;

[0021] The horizontal slide is fixedly provided with a slide rail extending along the Z-axis, and the slide rail is slidably connected to the slide groove on the longitudinal slide.

[0022] Furthermore, the aforementioned multi-point dynamically adjustable tunnel light source also includes a locking component for defining the relative positions of the longitudinal slide and the horizontal slide in the Z-axis direction.

[0023] Further specifying, in the aforementioned multi-point dynamically adjustable tunnel light source, a horizontal scale extending along the X-axis is also fixedly provided on the fixing plate.

[0024] Further specifying, in the aforementioned multi-point dynamically adjustable tunnel light source, a longitudinal scale extending along the Z-axis is also fixedly provided on the horizontal slide.

[0025] Further specifying, in the above-mentioned multi-point dynamic adjustable tunnel light source, the working frame includes a worktable and a mounting base fixedly mounted on the worktable;

[0026] The lifting guide rod is fixedly mounted on the workbench, and the fixing plate is fixedly mounted on the mounting base.

[0027] This utility model has at least the following beneficial effects:

[0028] 1. The system uses two reflective shells to reflect light onto the workpiece. Since the height and spacing of the reflective shells relative to the workpiece can be adjusted, and the camera module can adaptively adjust its position relative to the workpiece based on the position of the reflective shells, the illumination angle of the light source can be adjusted according to different inspection requirements and object shapes to obtain the best lighting effect. This solves the visual imaging problem of highly reflective rotating metal objects and can handle the simultaneous use of multiple camera modules and X-axis movement scenarios. At the same time, the light is reflected and dissipated in a set manner within the reflective cavity, achieving a uniform diffused lighting effect, reducing shadows and reflections, and providing a uniform and stable lighting environment for the machine vision system. This helps to accurately acquire image information of objects and provides strong support for machine vision inspection.

[0029] 2. Since the guide hole and the lifting guide rod are slidably connected, the connecting block can rotate relative to the lifting guide rod when the adjusting bolt is not tightened, thereby adjusting the angle between the reflective shell and the workpiece, further improving its ability to construct a reflective environment, and ensuring the accuracy of obtaining workpiece image information. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the multi-point dynamically adjustable tunnel light source according to an embodiment of this application;

[0031] Figure 2 This is a schematic diagram of the structure of the "reflective shell 300" part in the multi-point dynamic adjustable tunnel light source of this application embodiment;

[0032] Figure 3 This is a schematic diagram of the structure of the "adjustment plate 220" and "visual component 400" in the multi-point dynamic adjustable tunnel light source of this application embodiment;

[0033] Figure 4 This is a schematic diagram showing the cooperation between the "lifting guide rod 210 and connecting block 230" in the multi-point dynamic adjustable tunnel light source of this application embodiment;

[0034] Figure 5 This is a schematic diagram of the structure of the "visual component 400" in the multi-point dynamically adjustable tunnel light source of this application embodiment;

[0035] Figure 6 This is a structural cross-sectional view of the "visual component 400" in the multi-point dynamic adjustable tunnel light source of this application embodiment.

[0036] Figure Labels

[0037] Workbench-110, Mounting base-120, Lifting guide rod-210, Adjusting plate-220, U-shaped groove-221, Connecting block-230, Guide hole-231, Clamping groove-232, Fastening hole-233, Reflector shell-300, Reflector cavity-310, Fixing hole-320, Vision component-400, Camera module-410, Fixing plate-420, Horizontal slide-table-430, Longitudinal ruler-441, Horizontal ruler-442, Connecting plate-450, Longitudinal adjusting rod-460, Lateral adjusting rod-470, Longitudinal slide-table-481, Adjusting hole-482, Slide groove-483, Slide rail-490. Detailed Implementation

[0038] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0039] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0040] The multi-point dynamically adjustable tunnel light source provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.

[0041] like Figures 1 to 6 As shown, this application embodiment provides a multi-point dynamically adjustable tunnel light source, including a working frame, on which a workpiece positioning unit, a light source component located at the corresponding position of the workpiece positioning unit, and a vision component 400 are fixedly mounted.

[0042] The light source assembly includes an adjustment mechanism fixedly mounted on the working frame. Two reflector shells 300 are detachably connected to the adjustment mechanism. The two reflector shells 300 are symmetrically arranged about the reference plane. A reflector cavity 310 with an opening facing the workpiece positioning unit is provided inside the reflector shell 300. The inner wall of the reflector cavity 310 near the reference plane is connected to the outside, and a light-emitting unit is fixedly mounted on the inner wall.

[0043] The vision component 400 includes a fixed plate 420 fixedly mounted on a working frame, a horizontal adjustment rod 470 fixedly mounted on the fixed plate 420, a plurality of horizontal slides 430 slidably mounted on the horizontal adjustment rod 470, a vertical adjustment rod 460 fixedly mounted on the horizontal slides 430, a vertical slide 481 slidably mounted on the vertical adjustment rod 460, a connecting plate 450 fixedly mounted on the vertical slide 481, and a camera module 410 fixedly mounted on the connecting plate 450.

[0044] Among them, the two reflective shells 300 can move along the Y-axis direction on the adjustment mechanism respectively, or move synchronously along the Z-axis direction on the adjustment mechanism.

[0045] The lateral adjustment rod 470 extends along the X-axis, and the longitudinal adjustment rod 460 extends along the Z-axis. The reference plane is specifically set to be parallel to the X / Z-axis plane.

[0046] It should be noted that the X, Y, and Z axes mentioned above use the same spatial coordinate system, which is mainly used for the orientation description of the reflector housing 300 and the camera module 410, and will not be elaborated here.

[0047] During inspection, the workpiece to be inspected is positioned by the workpiece positioning unit. After the workpiece is positioned, the height (Z-axis) between the reflector shell 300 and the workpiece and the distance (Y-axis) between the two reflector shells 300 can be adjusted by the adjustment mechanism. At the same time, the horizontal slide 430 can move on the horizontal adjustment rod 470 and the vertical slide 481 can move on the vertical adjustment rod 460, thereby adjusting the relative position between the camera module 410 and the reflector shell 300, so that the camera module 410 is located at the gap between the two reflector shells 300, that is, at the corresponding position of the workpiece on the workpiece positioning unit, thereby realizing the inspection of the workpiece.

[0048] In this embodiment, a multi-point dynamically adjustable tunnel light source is used. The reflection of the workpiece is achieved through two reflective shells 300. Since the reflective shells 300 can adjust their height and spacing relative to the workpiece, and the camera module 410 can adaptively adjust its orientation relative to the workpiece based on the position of the reflective shells 300, the illumination angle of the light source can be adjusted according to different detection requirements and object shapes to obtain the best lighting effect. This solves the visual imaging problem of highly reflective rotating metal objects and can cope with the simultaneous use of multiple camera modules 410 and X-axis moving work scenarios. At the same time, the light is reflected and dissipated in a set manner within the reflective cavity 310, achieving a uniform diffuse lighting effect, reducing shadows and reflections, and providing a uniform and stable lighting environment for the machine vision system. This helps to accurately acquire image information of objects and provides strong support for machine vision inspection.

[0049] In a preferred embodiment, such as Figures 1 to 4 As shown, the adjustment mechanism includes a lifting guide rod 210 fixedly mounted on the working frame and extending along the Z-axis. A connecting block 230 is provided on the lifting guide rod 210, and an adjustment plate 220 that can be fixedly connected to the reflector shell 300 is fixedly mounted on the connecting block 230.

[0050] The adjustment plate 220 has a U-shaped groove 221 extending through it in the X-axis direction. The U-shaped groove 221 extends along the Y-axis direction. The reflector shell 300 has a fixing hole 320 on the end face near the adjustment plate 220. The adjustment plate 220 and the reflector shell 300 can be fixedly connected by bolts through the U-shaped groove 221 and the fixing hole 320.

[0051] It is understandable that by adjusting the height of the connecting block 230 on the lifting guide rod 210, the relative distance between the reflector shell 300 and the workpiece can be adjusted. At the same time, by adjusting the relative position of the fixing hole 320 and the U-shaped groove 221 on the reflector shell 300 in the Y-axis direction, the gap between the two reflector shells 300 can be adjusted, thereby realizing the position adjustment of the reflector shell 300 in the Y-axis and Z-axis directions to meet the lighting requirements of the workpiece.

[0052] In a preferred embodiment, such as Figures 1 to 4 As shown, the connecting block 230 is provided with a guide hole 231 and a clamping groove 232 through it along the Z-axis direction. The guide hole 231 is slidably connected to the lifting guide rod 210. The inner wall of the clamping groove 232 on the side near the lifting guide rod 210 is connected to the inner wall of the guide hole 231 on the corresponding side, and the inner wall on the side away from the lifting guide rod 210 is connected to the outside of the connecting block 230.

[0053] The connecting block 230 is also provided with a fastening hole 233 that communicates with the clamping groove 232, and the fastening hole 233 is internally threaded with an adjusting bolt.

[0054] When the adjusting bolt is screwed into the fastening hole 233, the gap of the clamping groove 232 can be reduced to achieve clamping and fixing of the connecting block 230 on the lifting guide rod 210.

[0055] In this embodiment, a multi-point dynamic adjustable tunnel light source is used. Since the guide hole 231 is slidably connected to the lifting guide rod 210, the connecting block 230 can rotate relative to the lifting guide rod 210 when the adjusting bolt is not tightened, thereby adjusting the angle between the reflective shell 300 and the workpiece, further improving its ability to construct a reflective environment, and ensuring the accuracy of obtaining workpiece image information.

[0056] In a preferred embodiment, the workpiece positioning unit is provided with an X-axis adjustment unit, which can adjust the relative position of the workpiece and the working frame in the X-axis direction.

[0057] It is understandable that the X-axis adjustment unit can also be set between the lifting guide rod 210 and the working frame. That is, the position adjustment of the reflector shell 300 in the X-axis can be achieved through the X-axis adjustment unit. As long as the relative position adjustment between the reflector shell 300 and the workpiece in the X, Y and Z directions can be met, it will not be elaborated here.

[0058] In a preferred embodiment, such as Figure 1 , Figure 5 As shown, four horizontal slides 430 are slidably connected to the horizontal adjusting rods 470.

[0059] Among them, multiple parallel horizontal adjustment rods 470 are fixed on the fixed plate 420.

[0060] In a preferred embodiment, such as Figure 6 As shown, an adjustment hole 482 is provided through the longitudinal slide table 481 along the Z-axis direction, which is slidably connected to the longitudinal adjustment rod 460.

[0061] In a preferred embodiment, such as Figure 6As shown, a groove 483 is provided through the longitudinal slide table 481 along the Z-axis direction, and the inner wall of the groove 483 near the horizontal slide table 430 is connected to the outside of the longitudinal slide table 481.

[0062] The horizontal slide table 430 is fixedly provided with a slide rail 490 extending along the Z-axis direction, and the slide rail 490 is slidably connected to the slide groove 483 on the longitudinal slide table 481.

[0063] It is understandable that the sliding connection between the slide rail 490 and the slide groove 483, as well as the sliding connection between the slide groove 483 and the longitudinal adjustment rod 460, can improve the stability of the camera module 410 when moving in the Z-axis direction.

[0064] In a preferred embodiment, a locking component is also included for defining the relative positions of the longitudinal slide 481 and the horizontal slide 430 in the Z-axis direction.

[0065] Understandably, the locking component is mainly used to limit the vertical position adjustment freedom of the camera module 410. Its setting can be to adjust the sliding damping between the vertical adjustment rod 460 and the vertical slide 481, or to set an adjustable friction braking device between the vertical slide 481 and the horizontal slide 430. As long as the relative position between the vertical slide 481 and the horizontal slide 430 can be fixed after adjustment, it will not be elaborated here.

[0066] In a preferred embodiment, such as Figure 1 , 5 As shown, a horizontal ruler 442 extending along the X-axis is also fixed on the fixed plate 420.

[0067] Understandably, the horizontal scale 442 can intuitively show the gap between multiple horizontal slides 430 and their relative position with the fixed plate 420, which facilitates the positional adjustment accuracy of the camera module 410 in the X-axis direction.

[0068] In a preferred embodiment, such as Figure 1 , 3 As shown in Figure 5, a longitudinal scale 441 extending along the Z-axis is also fixed on the horizontal slide 430.

[0069] Understandably, the vertical scale 441 can intuitively show the relative position between the vertical slide 481 and the horizontal slide 430, which facilitates the positional adjustment accuracy of the camera module 410 in the Z-axis direction.

[0070] In a preferred embodiment, such as Figure 1 , Figure 3 As shown, the working frame includes a worktable 110 and a mounting base 120 fixedly mounted on the worktable 110.

[0071] The lifting guide rod 210 is fixedly mounted on the workbench 110, and the fixing plate 420 is fixedly mounted on the mounting base 120.

[0072] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0073] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A multi-point dynamically adjustable tunnel light source, characterized in that, It includes a working frame, on which a workpiece positioning unit, a light source component located at a corresponding position of the workpiece positioning unit, and a vision component are fixedly mounted; The light source assembly includes: The adjustment mechanism is fixedly mounted on the working frame and is detachably connected to two reflective shells, which are symmetrically arranged about a reference plane. The reflective shell has a reflective cavity inside that opens toward the workpiece positioning unit, and a light-emitting unit is fixed on the inner wall. The vision component includes a fixed plate fixedly mounted on a working frame, a horizontal adjustment rod fixedly mounted on the fixed plate, a plurality of horizontal slides slidably mounted on the horizontal adjustment rod, a vertical adjustment rod fixedly mounted on the horizontal slides, a vertical slide slidably mounted on the vertical adjustment rod, and a camera module fixedly mounted on the vertical slide. The two reflective shells can move along the Y-axis direction on the adjustment mechanism, or move synchronously along the Z-axis direction on the adjustment mechanism. The lateral adjustment rod extends along the X-axis, the longitudinal adjustment rod extends along the Z-axis, and the reference plane is specifically set to be parallel to the X / Z-axis plane.

2. The multi-point dynamically adjustable tunnel light source according to claim 1, characterized in that, The adjustment mechanism includes a lifting guide rod fixedly mounted on the working frame and extending along the Z-axis direction. A connecting block is provided on the lifting guide rod, and an adjustment plate that can be fixedly connected to the reflector shell is fixedly mounted on the connecting block. The adjustment plate has a U-shaped groove running through it in the X-axis direction and the U-shaped groove extends along the Y-axis direction. The reflector shell has a fixing hole on the end face near the adjustment plate. The adjustment plate and the reflector shell can be fixedly connected by bolts through the U-shaped groove and the fixing hole.

3. The multi-point dynamically adjustable tunnel light source according to claim 2, characterized in that, The connecting block is provided with a guide hole and a clamping groove through it along the Z-axis direction. The guide hole is slidably connected to the lifting guide rod. The inner wall of the clamping groove on the side closer to the lifting guide rod is connected to the inner wall of the guide hole on the corresponding side, and the inner wall on the side farther from the lifting guide rod is connected to the outside of the connecting block. The connecting block is also provided with a fastening hole that communicates with the clamping groove, and an adjusting bolt is threaded into the fastening hole; When the adjusting bolt is screwed into the fastening hole, it can reduce the gap of the clamping groove to achieve clamping and fixing of the connecting block on the lifting guide rod.

4. The multi-point dynamically adjustable tunnel light source according to claim 1, characterized in that, The workpiece positioning unit is equipped with an X-axis adjustment unit, which can adjust the relative position of the workpiece and the working frame along the X-axis.

5. A multi-point dynamically adjustable tunnel light source according to claim 1, characterized in that, The longitudinal slide is provided with an adjustment hole along the Z-axis direction, which is slidably connected to the longitudinal adjustment rod.

6. A multi-point dynamically adjustable tunnel light source according to claim 1 or 5, characterized in that, A groove is provided through the longitudinal slide table along the Z-axis direction, and the inner wall of the groove near the horizontal slide table is connected to the outside of the longitudinal slide table. The horizontal slide is fixedly provided with a slide rail extending along the Z-axis, and the slide rail is slidably connected to the slide groove on the longitudinal slide.

7. A multi-point dynamically adjustable tunnel light source according to claim 6, characterized in that, It also includes a locking component for defining the relative positions of the longitudinal slide and the horizontal slide in the Z-axis direction.

8. A multi-point dynamically adjustable tunnel light source according to claim 1, characterized in that, A horizontal ruler extending along the X-axis is also fixed on the fixing plate.

9. A multi-point dynamically adjustable tunnel light source according to claim 1 or 8, characterized in that, A longitudinal scale extending along the Z-axis is also fixedly installed on the horizontal slide.

10. A multi-point dynamically adjustable tunnel light source according to claim 2, characterized in that, The working frame includes a workbench and a mounting base fixedly mounted on the workbench; The lifting guide rod is fixedly mounted on the workbench, and the fixing plate is fixedly mounted on the mounting base.

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