Shadowless Lighting Assembly and Visual Inspection System
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU INS IMAGE SOFTWARE TECH CO LTD
- Filing Date
- 2026-05-14
- Publication Date
- 2026-06-30
Smart Images
Figure CN224434262U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machine vision inspection technology, and in particular to a shadowless light illumination combination device and a vision inspection system. Background Technology
[0002] Machine vision inspection refers to an automated technology that uses machine vision products to convert captured targets into image signals, transmits them to a specialized image processing system, and performs non-contact measurement and judgment of the target objects. It integrates multiple fields such as optics, mechanics, electronics, and artificial intelligence, and is widely used in industrial manufacturing, quality control, and intelligent recognition scenarios.
[0003] Currently, surface defect detection based on machine vision usually requires the use of uniform lighting products to illuminate objects. However, when visually inspecting new energy vehicle batteries, precision electronic components, and highly reflective metal surfaces, there are often problems such as contour interference and defect submersion, directional lighting blind spots, and difficulty in separating defects from contours. This results in existing vision inspection systems having lighting shadow areas, which cannot effectively identify products with complex three-dimensional structures, thus affecting the accuracy of the inspection.
[0004] Therefore, there is an urgent need to design a shadowless lighting combination device to solve the above-mentioned problems in the existing technology. Utility Model Content
[0005] The purpose of this invention is to provide a shadowless illumination combination device and a visual inspection system that can provide a clear "shadowless" illumination effect for the object to be inspected, thereby improving the accuracy and efficiency of the inspection of the object surface.
[0006] To achieve this objective, the present invention adopts the following technical solution:
[0007] Shadowless lighting assembly includes:
[0008] Mounting rack;
[0009] A main light source module is mounted on the mounting frame, and the light emission direction of the main light source module is arranged vertically.
[0010] Side light source modules are mounted on mounting brackets on both sides of the main light source module. The light emission directions of the main light source module and the side light source modules are set at an angle, and the light rays can converge at a point along the light emission directions of the main light source module and the side light source modules on both sides.
[0011] Preferably, the mounting bracket is made of aluminum alloy and has through-holes for heat dissipation.
[0012] Preferably, the mounting bracket has a weight-reducing groove inside.
[0013] Preferably, the side light source modules on both sides of the main light source module are symmetrically arranged with respect to the light emission direction of the main light source module.
[0014] Preferably, the mounting bracket has a first shooting aperture for the image capturing device to acquire images, the main light source module includes a main light-emitting element, the main light-emitting element is connected to the mounting bracket, and the main light-emitting element has a second shooting aperture, which is positioned opposite to the first shooting aperture.
[0015] Preferably, the main light source module further includes a main diffuser plate, which is connected to the mounting frame and covers the side of the main light-emitting element away from the mounting frame;
[0016] The main diffuser plate has a third imaging aperture slot, which is positioned opposite the second imaging aperture slot.
[0017] Preferably, the main light source module further includes a transparent protective plate, which is connected to the mounting bracket and disposed between the main diffuser plate and the main light-emitting element.
[0018] Preferably, the side light source module includes a support base, a side light-emitting element, and a side diffuser plate. The support base is detachably connected to the mounting bracket, the side light-emitting element is connected to the support base, the side diffuser plate is connected to the support base, and the side diffuser plate covers the side of the side light-emitting element that is away from the support base.
[0019] Preferably, the side light source module further includes heat dissipation fins, which are fixedly connected to the support.
[0020] The visual inspection system includes an image acquisition device and the aforementioned shadowless illumination combination device. The image acquisition device is fixedly connected to the mounting frame and is located above the main light source module and the side light source module.
[0021] The mounting bracket has a first shooting aperture for the image capturing device to acquire images, and the main light source module has a light source aperture, which is directly opposite the first shooting aperture.
[0022] The beneficial effects of this utility model are as follows:
[0023] The shadowless lighting assembly provided by this utility model includes a mounting frame, a main light source module, and side light source modules. Both the main light source module and the two side light source modules are mounted on the mounting frame, thus the shadowless lighting assembly has an integrated structure, is simple in design, easy to carry, and highly practical. The main light source module emits light vertically. Since side light source modules are located on both sides of the main light source module, their light emission directions are angled to the main light source module's light emission direction. Furthermore, the light emission directions of the side light source modules and the main light source module are aligned vertically. Since light rays can converge at a single point, the main light source module and the side light source module form a lighting combination of vertical bottom light and dual-sided supplementary light. The main light source module provides uniform bottom light in the vertical direction to clearly present features such as dirt and damage on the object surface. The side light source module provides lateral supplementary light from a specific angle to highlight minor scratches and uneven defects. At the same time, the superposition of light fields by multiple light source modules can eliminate the shadow interference generated by the three-dimensional contour, thereby reducing the impact of shadows on the visual inspection of the object surface and greatly improving the accuracy and efficiency of the visual inspection system for detecting the object surface.
[0024] The visual inspection system provided by this utility model includes an image acquisition device and the aforementioned shadowless illumination combination device. The image acquisition device captures images of the object to be inspected below through the light source aperture and the first shooting aperture to obtain a clear surface image. Since the mounting frame is equipped with a main light source module and a side light source module, and the two side light source modules are located on both sides of the main light source module, the main light source module and the side light source module form a vertical bottom light plus double-sided supplementary light illumination combination, which can provide a clear "shadowless" illumination effect for the object to be inspected, reduce the influence of shadows on the visual inspection of the object surface, and greatly improve the accuracy and efficiency of the visual inspection system in detecting the object surface. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the structure of the shadowless light illumination combination device provided in a specific embodiment of this utility model;
[0026] Figure 2 This is a cross-sectional view of the shadowless lighting combination device provided in a specific embodiment of this utility model.
[0027] In the picture:
[0028] 1-Mounting frame; 11-Heat dissipation channel; 12-Weight reduction groove; 13-First shooting hole slot; 14-First frame; 15-Second frame;
[0029] 2-Main light source module; 21-Main light-emitting component; 211-Second imaging aperture slot; 22-Main diffuser plate; 221-Third imaging aperture slot; 23-Transparent protective plate;
[0030] 3-Side light source module; 31-Carrier base; 32-Side light-emitting element; 33-Side diffuser plate; 34-Heat dissipation fins; 35-Light-concentrating element;
[0031] 4-Connectors. Detailed Implementation
[0032] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.
[0033] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0035] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0036] like Figure 1 and Figure 2As shown, this utility model provides a shadowless lighting combination device, which includes a mounting frame 1, a main light source module 2, and side light source modules 3 mounted on the mounting frame 1 on both sides of the main light source module 2. The main light source module 2 is mounted on the mounting frame 1, and the light emission direction of the main light source module 2 is arranged vertically. The light emission directions of the main light source module 2 and the side light source modules 3 are arranged at an angle, and the light rays can converge at a point along the light emission directions of the main light source module 2 and the side light source modules 3 on both sides. In this embodiment, the main light source module 2 and the two side light source modules 3 are all mounted on the mounting frame 1. Therefore, the shadowless lighting assembly is an integral structure, simple in structure, easy to carry, and highly practical. The light emission direction of the main light source module 2 is vertical. Since side light source modules 3 are provided on both sides of the main light source module 2, the light emission directions of the two side light source modules 3 are respectively set at an angle to the light emission direction of the main light source module 2. Furthermore, along the light emission direction of the side light source modules 3 and the light emission direction of the main light source module 2, the light rays can converge at a point. The main light source module 2 and the side light source module 3 form an illumination combination of vertical bottom light and double-sided supplementary light. The main light source module 2 provides uniform bottom light in the vertical direction to clearly present features such as dirt and damage on the object surface. The side light source module 3 provides lateral supplementary light from a specific angle to highlight minor scratches and uneven defects. At the same time, the superposition of light fields by multiple light source modules can eliminate the shadow interference generated by the three-dimensional contour, thereby reducing the impact of shadows on the visual inspection of the object surface and greatly improving the accuracy and efficiency of the visual inspection system in detecting the object surface.
[0037] In this embodiment, two side light source modules 3 are provided, which are respectively located on both sides of the main light source module 2, so that the final imaging effect is: surface defects, dirt and uneven structures are clearly highlighted, and interference from three-dimensional contours is effectively suppressed, thereby achieving "shadowless" detection.
[0038] Specifically, such as Figure 1 and Figure 2 As shown, the mounting bracket 1 is made of aluminum alloy and has a through heat dissipation channel 11. Aluminum alloy has good thermal conductivity, which is conducive to the rapid heat dissipation of the main light source module 2 and the side light source module 3. At the same time, since the mounting bracket 1 has a through heat dissipation channel 11, the heat dissipation channel 11 can be connected to air cooling or water cooling pipes so that airflow or cooling liquid can flow through the heat dissipation channel 11 for active heat dissipation, so as to maintain the long-term stable operation of the light source module.
[0039] To reduce the weight of the shadowless lighting assembly and improve its practicality, the mounting bracket 1 is provided with a weight-reducing groove 12; in this embodiment, as... Figure 2 As shown, the weight reduction groove 12 extends through the mounting frame 1 along its length.
[0040] In this embodiment, as Figure 1As shown, the mounting bracket 1 is a long strip structure, and the heat dissipation channel 11 and the weight reduction groove 12 both pass through the mounting bracket 1 along its length.
[0041] To further enhance the lighting effect of the shadowless lighting combination device, the side light source modules 3 on both sides of the main light source module 2 are symmetrically arranged with respect to the light output direction of the main light source module 2. The symmetrically arranged side light source modules 3 can achieve complementary lighting to maximize the cancellation of unilateral shadows generated by the three-dimensional contour.
[0042] like Figure 2 As shown, the mounting frame 1 has a first shooting aperture slit 13 for the image capturing device to acquire images. The main light source module 2 includes a main light-emitting element 21, which is connected to the mounting frame 1. The main light-emitting element 21 has a second shooting aperture slit 211, which is positioned opposite the first shooting aperture slit 13. Specifically, an image capturing device is mounted above the shadowless lighting assembly. The image capturing device is a CCD camera or CMOS camera commonly used in the art. The lens of the image capturing device is positioned opposite the first shooting aperture slit 13 to facilitate framing and shooting. The main light-emitting element 21 is an LED light panel commonly used in the art.
[0043] The specific structure of mounting bracket 1 can be configured according to actual conditions, as long as it facilitates the installation of the main light source module 2 and the side light source module 3. In this embodiment, for example... Figure 1 As shown, the mounting frame 1 includes a first frame 14 and a second frame 15 symmetrically arranged. Both the first frame 14 and the second frame 15 are elongated structures. The two ends of the first frame 14 and the second frame 15 are fixedly connected by connectors 4 to form a whole. A first shooting hole slit 13 is provided between the first frame 14 and the second frame 15. Specifically, the connector 4 has a left connecting plate and a right connecting plate. The left connecting plate is connected to the first frame 14 by bolts, and the right connecting plate is connected to the second frame 15 by bolts, thereby fixing the first frame 14 and the second frame 15 together. The main light-emitting component 21 includes a first light-emitting plate and a second light-emitting plate symmetrically arranged. The first light-emitting plate is fixedly connected to the first frame 14, and the second light-emitting plate is fixedly connected to the second frame 15. A second shooting hole slit 211 is provided between the first light-emitting plate and the second light-emitting plate, and the second shooting hole slit 211 is positioned directly opposite the first shooting hole slit 13.
[0044] To further improve the lighting effect of the light source module, such as Figure 2As shown, the main light source module 2 also includes a main diffuser plate 22, which is connected to the mounting frame 1 and covers the side of the main light-emitting element 21 facing away from the mounting frame 1. The main diffuser plate 22 has a third imaging aperture slit 221, which is positioned opposite to the second imaging aperture slit 211. In this embodiment, the main diffuser plate 22 is made of a high-haze light-transmitting material commonly used in the art, and is used to convert the light emitted by the main light-emitting element 21 into a uniform surface light source to provide uniform illumination light for the object to be detected. It is understood that, in order to prevent the main diffuser plate 22 from affecting the imaging effect of the image capturing device, the main diffuser plate 22 is divided into a first diffuser plate and a second diffuser plate. The first diffuser plate is fixedly connected to the first frame 14, and the second diffuser plate is fixedly connected to the second frame 15. The third imaging aperture slit 221 is located between the first diffuser plate and the second diffuser plate.
[0045] To protect the main light-emitting component 21 and extend the service life of the shadowless lighting assembly, such as... Figure 2 As shown, the main light source module 2 also includes a transparent protective plate 23, which is connected to the mounting frame 1 and positioned between the main diffuser plate 22 and the main light-emitting element 21. In this embodiment, the transparent protective plate 23 is made of high-transparency, high-resolution glass, such as high-transparency K9 glass, BSC7 glass, N-BK7 glass, or other optical glass with similar performance. The two ends of the transparent protective plate 23 are respectively sealed to the first frame 14 and the second frame 15, which can prevent dust, oil, and other debris from entering the main light source module 2 from below and contaminating the main light-emitting element 21, while also ensuring that light can pass through smoothly.
[0046] Specifically, such as Figure 2 As shown, the side light source module 3 includes a support base 31, a side light-emitting element 32, and a side diffuser plate 33. The support base 31 is detachably connected to the mounting frame 1, the side light-emitting element 32 is connected to the support base 31, and the side diffuser plate 33 is connected to the support base 31, with the side diffuser plate 33 covering the side of the side light-emitting element 32 facing away from the support base 31. In this embodiment, the two support bases 31 are respectively connected to the first frame 14 and the second frame 15 by bolts. The side light-emitting element 32 is also an LED light panel, and the side light-emitting element 32 is inclinedly connected to the support base 31, so that the light emitted by the side light-emitting element 32 forms an angle with the vertical direction. The side diffuser plate 33 is the same as the main diffuser plate 22, both made of high haze light-transmitting material commonly used in the art, and is used to convert the light emitted by the side light-emitting element 32 into a uniform surface light source.
[0047] The specific structure of the support base 31 can be configured according to actual conditions, as long as the stable installation of the side-emitting element 32 is ensured. For example, such as Figure 2As shown, the support 31 has a mounting cavity, the opening of the mounting cavity is at an angle to the light emission direction of the main light-emitting element 21, the side light-emitting element 32 is fixedly installed in the mounting cavity, and the light emitted by the side light-emitting element 32 is emitted from the opening of the mounting cavity, and the side diffuser plate 33 is sealed to the opening of the mounting cavity.
[0048] Furthermore, such as Figure 2 As shown, the side light source module 3 also includes heat dissipation fins 34, which are fixedly connected to the support base 31. Both the support base 31 and the heat dissipation fins 34 are made of aluminum alloy and are integrally formed. When the shadowless lighting assembly is working, the heat of the side light source 32 is transferred to the support base 31 and dissipated into the air through the heat dissipation fins 34, thereby achieving rapid heat dissipation of the side light source 32.
[0049] The specific structure of the support seat 31 can be set according to the actual situation. In this embodiment, the support seat 31 is a cuboid structure with an installation cavity on one side. The length of the support seat 31 is the same as the length of the first frame 14 and the second frame 15. The support seat 31 has a through groove to reduce weight.
[0050] Furthermore, such as Figure 2 As shown, the side light source module 3 also includes a focusing element 35, which is disposed in the mounting cavity and located between the side diffuser plate 33 and the side light emitter 32. The focusing element 35 is a commonly used optical element in the art for concentrating or guiding light. It efficiently collects and guides the light emitted by the side light emitter 32 to the side diffuser plate 33 through the principle of total internal reflection, thereby reducing light loss and improving light intensity and directionality. In this embodiment, the focusing element 35 is a commonly used focusing rod.
[0051] In this embodiment, the power interfaces of the main light-emitting element 21 and the side light-emitting element 32 are both standardized power interfaces commonly used in the art. They have pins with a spacing of 2mm inside, which can be plugged in and used immediately, and have the effect of preventing reverse insertion.
[0052] This embodiment also provides a visual inspection system, which includes an image acquisition device and the aforementioned shadowless illumination combination device. The image acquisition device is fixedly connected to the mounting frame 1 and is located above the main light source module 2 and the side light source module 3. The mounting frame 1 has a first shooting aperture slit 13 for the image acquisition device to acquire images, and the main light source module 2 has a light source aperture slit, which is directly opposite the first shooting aperture slit 13. In this embodiment, the image acquisition device captures images of the object to be inspected below through the light source aperture slit and the first shooting aperture slit 13 to obtain a clear surface image. Since the main light source module 2 and the side light source module 3 are provided on the mounting frame 1, and the two side light source modules 3 are located on both sides of the main light source module 2, the main light source module 2 and the side light source module 3 form a vertical bottom light plus double-sided supplementary light illumination combination, which can provide a clear "shadowless" illumination effect for the object to be inspected, reduce the influence of shadows on the visual inspection of the object surface, and greatly improve the detection accuracy and efficiency of the visual inspection system for the object surface.
[0053] Specifically, such as Figure 2 As shown, the main light source module 2 includes a main light-emitting element 21 and a main diffuser plate 22. In order to prevent it from affecting the image capturing device above, the main light-emitting element 21 has a second shooting hole 211 in the middle, and the main diffuser plate 22 has a third shooting hole 221 in the middle. The second shooting hole 211 and the third shooting hole 221 form a light source hole.
[0054] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A shadowless lighting combination device, characterized in that, include: Mounting bracket (1); The main light source module (2) is disposed on the mounting frame (1), and the light emission direction of the main light source module (2) is arranged vertically. The side light source modules (3) are mounted on the mounting brackets (1) on both sides of the main light source module (2). The light emission directions of the main light source module (2) and the side light source modules (3) are set at an angle, and the light rays can converge at a point along the light emission directions of the main light source module (2) and the side light source modules (3) on both sides.
2. The shadowless lighting combination device according to claim 1, characterized in that, The mounting bracket (1) is made of aluminum alloy and has through heat dissipation channels (11).
3. The shadowless lighting combination device according to claim 1, characterized in that, The mounting bracket (1) has a weight-reducing groove (12) inside.
4. The shadowless lighting combination device according to claim 1, characterized in that, The side light source modules (3) on both sides of the main light source module (2) are symmetrically arranged with respect to the light output direction of the main light source module (2).
5. The shadowless lighting combination device according to claim 1, characterized in that, The mounting bracket (1) has a first shooting aperture (13) for the image capturing device to capture images. The main light source module (2) includes a main light-emitting element (21), which is connected to the mounting bracket (1). The main light-emitting element (21) has a second shooting aperture (211), which is positioned opposite to the first shooting aperture (13).
6. The shadowless lighting combination device according to claim 5, characterized in that, The main light source module (2) also includes a main diffuser plate (22), which is connected to the mounting frame (1) and covers the side of the main light-emitting element (21) away from the mounting frame (1); The main diffuser plate (22) has a third imaging aperture (221) which is positioned opposite the second imaging aperture (211).
7. The shadowless lighting combination device according to claim 6, characterized in that, The main light source module (2) also includes a transparent protective plate (23), which is connected to the mounting frame (1) and is disposed between the main diffuser plate (22) and the main light-emitting element (21).
8. The shadowless lighting combination device according to claim 1, characterized in that, The side light source module (3) includes a support base (31), a side light-emitting element (32), and a side diffuser plate (33). The support base (31) is detachably connected to the mounting bracket (1), the side light-emitting element (32) is connected to the support base (31), and the side diffuser plate (33) is connected to the support base (31). The side diffuser plate (33) covers the side of the side light-emitting element (32) away from the support base (31).
9. The shadowless lighting combination device according to claim 8, characterized in that, The side light source module (3) also includes heat dissipation fins (34), which are fixedly connected to the support base (31).
10. A visual inspection system, characterized in that, The device includes an image capturing device and a shadowless light illumination combination device as described in any one of claims 1-9, wherein the image capturing device is fixedly connected to the mounting frame (1) and is located above the main light source module (2) and the side light source module (3); The mounting bracket (1) has a first shooting aperture (13) for the image capturing device to capture images, and the main light source module (2) has a light source aperture, which is directly opposite the first shooting aperture (13).