Light source assembly and defect detection equipment with same

Abstract

The invention discloses a light source assembly and defect detection equipment with the same. The light source assembly comprises a first bearing frame and a second bearing frame, the first light source module is arranged on the first bearing frame and located below the camera, and the first light source module at least comprises a first light source; the second light source module is arranged on the first bearing frame and located below the first light source module, and the second light source module at least comprises a second light source located below the first light source; the liquid cooling structure is arranged on the first light source and the second light source, and the liquid cooling structure is configured to dissipate heat of the first light source and the second light source; the first light source module further comprises an optical element matched with the first light source, the optical element is configured to convert the light emitting direction of the first light source into vertical light emitting from transverse light emitting, and the second light source is arranged on the side of the optical element and emits light in an inclined mode.

Description

Technical Field

[0001] This application belongs to the technical field of defect detection equipment, specifically relating to a light source component and a defect detection device having the same. Background Technology

[0002] Defect detection is particularly important in the production process of some products with high surface quality requirements. Since it is difficult to meet quality control requirements by relying solely on human visual inspection methods, machine vision is now widely used to achieve defect detection.

[0003] There are many types of surface defects on workpieces, including scratches, blemishes, unevenness, indentations, ripples, and so on. During defect detection, the light source, through precise optical control, actively "shapes" and "extracts" the defect features of the object being inspected, converting them into high-contrast, stable, and measurable digital image signals. The light source generates heat during operation; overheating can lead to irreversible brightness decay and even flickering, directly disrupting the uniformity and stability of the illumination. Therefore, it is necessary to improve existing technologies to overcome these shortcomings. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this application is to provide a light source assembly and a defect detection device having the same.

[0005] To address the aforementioned technical problems, this application provides a light source assembly for providing a light source for a camera when acquiring image information of a workpiece. The light source assembly includes: a first support frame; a first light source module disposed on the first support frame and located below the camera, the first light source module including at least a first light source; a second light source module disposed on the first support frame and located below the first light source module, the second light source module including at least one second light source located below the first light source; and a liquid cooling structure disposed on the first light source and the second light source, the liquid cooling structure being configured to dissipate heat from the first light source and the second light source; wherein, the first light source module further includes an optical element cooperating with the first light source, the optical element being configured to change the light emission direction of the first light source from horizontal light emission to vertical light emission, and the second light source being disposed on the side of the optical element and emitting light at an angle.

[0006] In some embodiments, the first light source module further includes a housing connected to the housing of the first light source, the optical element being housed within the housing, and the housing having an opening on the side near and opposite to the first light source, through which light from the first light source enters and illuminates the optical element. The housing also has a first opening directly above the optical element and a second opening directly below the optical element. The optical elements are tilted to convert the light emitted from the first light source parallel to the horizontal plane into light perpendicular to the horizontal plane. The optical elements are prisms or beam splitters.

[0007] In some embodiments, a first fine-tuning structure is provided between the first light source module and the first support frame, wherein the first fine-tuning structure is configured to adjust the lateral position of the first light source module; and / or, A second fine-tuning structure is provided between the second light source module and the first support frame, wherein the second fine-tuning structure is configured to adjust the orientation of the second light source module; and / or, The first support frame is connected to a second support frame, which is located above the first support frame. A third fine-tuning structure is provided between the first support frame and the second support frame, and the third fine-tuning structure is configured to adjust the position of the first support frame in the lateral direction.

[0008] In some embodiments, the first fine-tuning structure includes a first adjusting member disposed at both opposite ends of the first light source module and a straight groove disposed on the first support frame and extending laterally, wherein a first fastener is disposed in the straight groove and a first hole is provided on the first adjusting member for screwing with the first fastener.

[0009] In some embodiments, the second fine-tuning structure includes a second adjusting member disposed on both opposite ends of the second light source module and an arc-shaped groove disposed on the first support frame, wherein the second adjusting member is rotatably disposed on the first support frame about the rotation axis X, a second fastener is disposed in the arc-shaped groove, and a second hole is provided on the second adjusting member for screwing with the second fastener.

[0010] In some embodiments, there are multiple second light sources, which are divided into two groups of second light sources, and the two groups of second light sources are respectively located on both sides of the reflected light path of the optical element; There is a preset distance between the two groups of second light sources in the horizontal direction. The preset distance forms an optical path channel between the two groups of second light sources, and the optical element is located directly above the optical path channel.

[0011] In some embodiments, the number of second light sources is even, and the two groups of second light sources are symmetrically distributed on both sides of the optical path channel, wherein each group of second light sources includes at least two second light sources, and the wavelengths of the at least two second light sources are different; or, Each group of the second light sources includes one second light source, and the multiple LED beads on the second light source have different colors.

[0012] In some embodiments, the housing of the second light source is provided with a first heat dissipation vent, and a valve structure is provided at the first heat dissipation vent. The valve structure includes a shape memory alloy component disposed in the second light source and a valve connected to the shape memory alloy component. The shape memory alloy component changes from a contracted state to an extended state in response to an increase in the temperature of the second light source. The valve moves away from or away from the first heat dissipation vent in response to the change of the shape memory alloy component from a contracted state to an extended state, and moves closer to or blocks the first heat dissipation vent in response to the change of the shape memory alloy component from an extended state to a contracted state.

[0013] In some embodiments, the valve structure further includes a movable block slidably disposed within the second light source and a connecting rod connecting the movable block and the valve, wherein one end of the shape memory alloy part is disposed on the inner wall of the housing and the other end facing each other is connected to the movable block, one end of the connecting rod is pivotally connected to the movable block and the other end is pivotally connected to the valve, and the valve is slidably disposed on the housing; The sliding direction of the moving block is perpendicular to the sliding direction of the valve. The moving block slides toward the first heat dissipation port in response to the change of the shape memory alloy part from a contracted state to an extended state. The connecting rod drives the valve to slide in response to the movement of the moving block toward the first heat dissipation port, so as to reduce the area of ​​the first heat dissipation port blocked by the valve. The movable block moves away from the first heat dissipation vent in response to the change of the shape memory alloy part from an extended state to a contracted state. The connecting rod drives the valve to slide in response to the movement of the movable block away from the first heat dissipation vent, so as to increase the area of ​​the first heat dissipation vent blocked by the valve.

[0014] This application also provides a defect detection device, which includes the light source assembly as described above.

[0015] The technical solution provided in this application has the following advantages: In this application, a liquid cooling structure is disposed on the first light source and the second light source. The liquid cooling structure is configured to dissipate heat from the first light source and the second light source, thereby achieving the purpose of effectively controlling the temperature rise of the first light source and the second light source.

[0016] Compared to traditional air cooling, liquid cooling has a much higher heat capacity and thermal conductivity than air, allowing it to remove more heat per unit time. This enables faster and more stable control of the core temperatures of the primary and secondary light sources, making it particularly suitable for high-power, long-term continuous operation scenarios. Liquid cooling, through its flow channel design, ensures the liquid medium fully contacts the heat source area, improving the overall heat dissipation uniformity of the primary and secondary light sources, thus extending their lifespan and maintaining stable light output. The liquid cooling structure primarily relies on a pump to drive liquid circulation, avoiding noise generated by fan rotation and further reducing noise levels. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A three-dimensional structural diagram of the light source assembly provided in this application; Figure 2 A cross-sectional structural diagram of the light source assembly provided in this application; Figure 3 This is a schematic diagram showing the positional relationship between the first light source module and the liquid cooling structure; Figure 4 This is a cross-sectional schematic diagram showing the relationship between the first light source module, the second light source module, and the liquid cooling structure. Figure 5 for Figure 3 A schematic diagram of the cross-sectional structure; Figure 6 This is a cross-sectional structural diagram of the second light source module and the liquid cooling structure. Figure 7 for Figure 6 Enlarged structural diagram of region A in the middle; Figure 8 This is a schematic diagram showing the positional relationship between the valve and the second guide unit; Figure 9 This is a schematic diagram of a shape memory alloy part in an extended state. Figure 10 This is a schematic diagram of the valve structure in another embodiment; Figure 11 This is a schematic diagram of the first support frame; Figure 12 This is a schematic diagram of the structure of the first adjusting component; Figure 13 This is a schematic diagram of the second adjusting component; Figure 14 This is a schematic diagram of the second light source module; Figure 15 for Figure 14 A schematic diagram of its decomposed structure. Detailed Implementation

[0019] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. The application will be described in detail below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0020] It should be noted that the terms "first," "second," etc., in the specification, claims, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0021] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0022] This application provides a light source assembly for providing light to a camera when acquiring image information of a workpiece. In one application scenario, the light source assembly is used in a vision inspection device to cooperate with a camera in detecting the quality of the outer surface of a workpiece, i.e., defect detection. In other application scenarios, the light source assembly is used in production equipment for illumination; or, the light source assembly is used in medical devices to assist a camera in acquiring image information of a patient. Of course, the application scenarios of the light source assembly are not limited to the above situations, and can also be used in other scenarios that require image information acquisition or illumination, which will not be elaborated here.

[0023] like Figures 1 to 3 As shown, the light source assembly includes a first support frame 300, a first light source module 100, and a second light source module 200. The first support frame 300 provides an installation base, and both the first light source module 100 and the second light source module 200 are mounted on the first support frame 300.

[0024] The first light source module 100 is located below the camera, and the second light source module 200 is located below the first light source module 100. This vertical arrangement of the first and second light source modules 100 effectively utilizes space in the vertical direction, resulting in a rational layout. Furthermore, the vertical projection of the first light source module 100 falls within the vertical projection of the second light source module 200, making the overall size more compact and efficiently utilizing space resources.

[0025] The first light source module 100 includes at least a first light source 110; the second light source module 200 includes at least one second light source 210 located below the first light source 110. The first light source 110 and the second light source 210 can be of the same or different types. For example, both the first light source 110 and the second light source 210 can be bar light sources, or one of the first light source 110 and the second light source 210 can be a bar light source, and the other can be a ring light source. Preferably, both the first light source 110 and the second light source 210 are bar light sources.

[0026] Considering that the first light source 110 and the second light source 210 generate heat during operation, causing their temperatures to rise continuously, this temperature increase directly affects the operational stability, luminous efficiency, and lifespan of the first light source 110 and the second light source 210. In severe cases, it may even lead to accelerated light decay or device failure. Therefore, to ensure the long-term and stable operation of the first light source 110 and the second light source 210, the light source assembly also includes a liquid cooling structure 400. The liquid cooling structure 400 is configured to dissipate heat from the first light source 110 and the second light source 210, thereby effectively controlling the temperature rise of the first light source 110 and the second light source 210.

[0027] The liquid cooling structure 400 is disposed on the first light source 110 and the second light source 210. It can be understood that each light source is equipped with a liquid cooling structure 400, and the light source and the liquid cooling structure 400 are arranged in a one-to-one correspondence. Alternatively, the following situations may occur: two light sources share one liquid cooling structure 400, or one light source is equipped with two or more liquid cooling structures 400.

[0028] In this application, there is a one-to-one correspondence between the light source and the liquid cooling structure 400. Both the first light source 110 and the second light source 210 are equipped with the liquid cooling structure 400, which is arranged along the extending direction (length direction) of the first light source 110 and the second light source 210. The liquid medium circulating inside the liquid cooling structure 400 effectively removes the heat generated by the first light source 110 and the second light source 210 during operation.

[0029] Compared to traditional air cooling, the liquid medium has a much higher heat capacity and thermal conductivity than air, allowing it to remove more heat per unit time. This enables faster and more stable control of the core temperatures of the first light source 110 and the second light source 210, making it particularly suitable for high-power, long-term continuous operation scenarios. Liquid cooling, through its flow channel design, ensures the liquid medium fully contacts the heat source area, improving the overall heat dissipation uniformity of the first light source 110 and the second light source 210, thus extending their lifespan and maintaining stable light output. The liquid cooling structure 400 primarily relies on a pump (not shown) to drive liquid circulation, avoiding noise generated by fan rotation and further reducing noise levels. The liquid cooling structure 400 can maintain closed-loop operation, resulting in lower system maintenance requirements.

[0030] like Figures 4 to 7 As shown, the liquid cooling structure 400 includes a substrate 410 and a flow channel 420 disposed within the substrate 410. The substrate 410 is provided with an inlet connector and an outlet connector that communicate with the flow channel 420. External liquid enters into the flow channel 420 through the inlet connector and flows out through the outlet connector. During the flow of the liquid medium within the flow channel 420, it carries away the heat generated by the first light source 110 and the second light source 210, thereby achieving the purpose of heat dissipation.

[0031] The light sources (first light source 110 and second light source 210) include at least a housing 211 connected to the substrate 410, a substrate 213 located within the space enclosed by the housing, and LED beads (not shown) disposed on the substrate 213. The substrate 213 is an aluminum substrate, and a light-diffusing plate 214 is provided at the bottom of the housing, with the light-diffusing plate 214 facing the substrate 213. To enable the liquid cooling structure 400 to better dissipate the heat generated by the light source, the substrate 213 is disposed on the outer wall (bottom surface) of the substrate 410. Furthermore, thermally conductive grease or a thermally conductive pad (not shown) is provided between the substrate 213 and the substrate 410 to fill the microscopic gaps and reduce thermal resistance.

[0032] Specifically, such as Figure 4 and Figure 6 As shown, the housing of the light source includes a first side plate 2111, a second side plate 2112, a first end plate 2113, and a second end plate 2114 extending along the length of the light source. The first end plate 2113 and the second end plate 2114 are respectively located at opposite ends of the first side plate 2111 and the second side plate 2112. The first side plate 2111, the second side plate 2112, the first end plate 2113, and the second end plate 2114 form a frame with an opening at the top and a bottom. The bottom end surface (liquid-cooled surface) of the substrate 410 is located at the top of the frame, and the light-diffusing plate 214 is located at the bottom opening of the frame.

[0033] like Figure 4 and Figure 5As shown, the liquid cooling structure 400 also includes heat dissipation fins 430 disposed on the pipe wall of the flow channel 420. The function of the heat dissipation fins 430 is to increase the surface area through which the liquid medium flows, thereby increasing the heat dissipation area. In one embodiment, as... Figure 4 As shown, the substrate 410 is divided into two parts, including a main body 411 and a side plate 412, with heat dissipation fins 430 provided on the side plate 412. The main body 411 is hollow internally and open on one side, while the side plate 412 is sealed at the open end of the main body 411. The main body 411 and the side plate 412 together form a flow channel 420, within which the heat dissipation fins 430 are located. Heat from the light source is conducted to the heat dissipation fins 430 through the side plate 412. The heat dissipation fins 430 not only increase the heat dissipation area but also ensure that the heat dissipation area is located within the flow channel 420. Thus, when the liquid medium flows within the flow channel 420, it can effectively carry away the heat generated by the light source, resulting in good heat dissipation.

[0034] To further improve the heat dissipation effect of the light source, in this application, the housing of the light source is also provided with heat dissipation vents. Specifically, the housings of the first light source 110 and / or the second light source 210 are provided with heat dissipation vents. The function of the heat dissipation vents is to enhance airflow to assist in the dissipation of internal heat. For ease of explanation, as follows... Figure 7 and Figure 8 As shown, the following description uses the example of a heat dissipation vent on the housing 211 of the second light source 210. However, based on the above description, the scope of protection of this application is not limited as a result.

[0035] The heat dissipation vents include a first heat dissipation vent 212 and a second heat dissipation vent 215, with the first heat dissipation vent 212 located above the second heat dissipation vent 215. The vertically distributed first heat dissipation vents 212 and second heat dissipation vents 215 form a channel for air convection. Hot air inside the light source housing is exhausted through the first heat dissipation vent 212, while cooler external air is drawn in through the second heat dissipation vent 215, creating a "chimney effect" that effectively reduces the temperature inside the light source housing. In one embodiment, both the first heat dissipation vents 212 and the second heat dissipation vents 215 are distributed on the first end plate 2113 and / or the second end plate 2114. Of course, the distribution of the first heat dissipation vents 212 and the second heat dissipation vents 215 is not limited to the above; the first heat dissipation vents 212 may be distributed on the first end plate 2113, and the second heat dissipation vents 215 may be distributed on the first side plate 2111, or each panel of the housing may have both first heat dissipation vents 212 and second heat dissipation vents 215.

[0036] In this application, as Figures 7 to 10As shown, a valve structure 800 is provided at the first heat dissipation vent 212. The valve structure 800 includes a shape memory alloy component 810 disposed within the second light source 210 and a valve 820 connected to the shape memory alloy component 810. The shape memory alloy component 810 deforms in response to temperature changes. The deformation of the shape memory alloy component 810 causes a change in the position of the valve 820, and the change in the position of the valve 820 affects the area of ​​the first heat dissipation vent 212 it blocks.

[0037] The shape memory alloy part 810 is spring-shaped, having a contracted state and an extended state. The contracted state corresponds to the state when the temperature is low, and the extended state corresponds to the state when the temperature rises. The shape memory alloy part 810 changes from the contracted state to the extended state in response to an increase in the temperature of the second light source 210, and automatically changes from the extended state to the contracted state in response to a decrease in the temperature of the second light source 210. The length of the shape memory alloy part 810 in the contracted state is less than its length in the extended state.

[0038] It is worth noting that the shape memory alloy 810 is a bidirectional shape memory alloy, which can remember two shape states. When a preset temperature is reached, a reversible phase transition of the atomic structure inside the shape memory alloy 810 is triggered, and the shape memory alloy 810 automatically changes from a contracted state to an extended state. When the temperature is lowered to below the preset temperature, the shape memory alloy 810 automatically changes from an extended state to a contracted state. When the temperature is raised again to reach the preset temperature, the shape memory alloy 810 changes from a contracted state to an extended state again. When the temperature is lowered again to below the preset temperature, the shape memory alloy 810 automatically changes from an extended state to a contracted state once more.

[0039] The valve 820 moves away from or away from the first heat dissipation vent 212 in response to the shape memory alloy component 810 changing from a contracted state to an extended state, and moves closer to or blocks the first heat dissipation vent 212 in response to the shape memory alloy component 810 changing from an extended state to a contracted state. In other words, the shape memory alloy component 810 can move the valve 820 in response to the temperature change of the light source, thereby changing the position of the valve 820, thus linking "heat" with "action".

[0040] The positional change of valve 820 affects the area of ​​the first heat dissipation vent 212 that is blocked, thus affecting the heat dissipation efficiency. When the second light source 210 is not working, the temperature inside the casing 211 is relatively low, the shape memory alloy component 810 does not deform, and the area of ​​the first heat dissipation vent 212 blocked by valve 820 is relatively large, or even completely blocked. When the second light source 210 is working, the temperature inside the casing 211 rises rapidly and becomes higher, causing the shape memory alloy component 810 to deform, changing from a contracted state to an extended state. This forces valve 820 to move, reducing the area of ​​the first heat dissipation vent 212 that is blocked. The first heat dissipation vent 212 is an airflow channel; specifically, it is a channel for internal hot air to flow out and external cold air to flow in. When the area of ​​the first heat dissipation vent 212 that is blocked decreases, the flow cross-sectional area of ​​the first heat dissipation vent 212 increases, reducing the flow resistance of the airflow and thus improving the heat dissipation efficiency.

[0041] In one embodiment, such as Figures 7 to 9 As shown, the valve structure 800 also includes a movable block 830 slidably disposed within the second light source 210 and a connecting rod 840 connecting the movable block 830 and the valve 820. The valve 820 is slidably disposed on the housing 211, and the sliding direction of the movable block 830 is perpendicular to the sliding direction of the valve 820.

[0042] Specifically, the movable block 830 is slidably disposed on the bottom end surface of the base 410 via the first guide unit 831, and the movable block 830 and the first guide unit 831 are disposed near the end of the substrate 213. The first guide unit 831 includes a first slide rail and a first slider, one of which is disposed on the bottom end surface of the base 410, and the other is disposed on the movable block 830. Preferably, the first slide rail is disposed on the bottom end surface of the base 410, and the first slider is disposed on the movable block 830. The first slide rail may be a first rib protruding from the bottom end surface of the base 410 and distributed along the extension direction of the substrate 213, or it may be a first groove recessed into the bottom end surface of the base 410, and the top of the movable block 830 is provided with a first slider located in the aforementioned first groove.

[0043] The valve 820 is slidably mounted on the first end plate 2113 via the second guide unit 821. The second guide unit 821 includes a second slide rail and a second slider, one of which is mounted on the first end plate 2113, and the other is mounted on the valve 820. Preferably, the second slide rail is mounted on the first end plate 2113, and the second slider is mounted on the valve 820. The second slide rail can be a second rib protruding from the first end plate 2113 and extending vertically, or it can be a second groove recessed into the first end plate 2113. The valve 820 has a second slider located within the second groove.

[0044] The valve 820 can be located either outside or inside the housing 211. When the valve 820 is located outside the housing 211, the connecting rod 840 passes through the first heat dissipation vent 212. When the valve 820 is located inside the housing 211, the connecting rod 840 does not need to pass through the first heat dissipation vent 212.

[0045] In this application, since the deformation of the shape memory alloy part 810 is preset, there is no need to set a separate limiting structure for the valve 820 and the moving block 830, which is more conducive to the arrangement within the limited space of the outer shell 211, and the structure is simple and compact.

[0046] One end of the shape memory alloy component 810 is located on the inner wall of the housing 211, and the other end is connected to the moving block 830. One end of the shape memory alloy component 810 is fixed relative to the housing 211, so that when the temperature inside the housing 211 rises and the shape memory alloy component 810 changes from a contracted state to an extended state, it can push the moving block 830 to move. One end of the connecting rod 840 is pivotally connected to the moving block 830, and the other end is pivotally connected to the valve 820. The pivot axis between one end of the connecting rod 840 and the moving block 830, and the pivot axis between the other end of the connecting rod 840 and the valve 820, are parallel.

[0047] When the temperature inside the outer casing 211 rises, the movable block 830 slides toward the first heat dissipation port 212 in response to the change of the shape memory alloy part 810 from a contracted state to an extended state. The connecting rod 840 drives the valve 820 to slide in response to the movement of the movable block 830 toward the first heat dissipation port 212. At this time, the valve 820 gradually deviates from the first heat dissipation port 212 (the valve 820 and the first heat dissipation port 212 are gradually offset) to reduce the area of ​​the first heat dissipation port 212 blocked by the valve 820.

[0048] When the temperature inside the housing 211 is low (the temperature when the second light source 210 is not working), the moving block 830 moves away from the first heat dissipation vent 212 in response to the change of the shape memory alloy part 810 from an extended state to a retracted state. The connecting rod 840, in response to the movement of the moving block 830 away from the first heat dissipation vent 212, drives the valve 820 to slide. At this time, the valve 820 gradually overlaps with the first heat dissipation vent 212 to increase the area of ​​the first heat dissipation vent 212 that is blocked by the valve 820. In extreme cases, the first heat dissipation vent 212 is completely covered by the valve 820.

[0049] like Figure 10As shown, in another embodiment, both the valve 820 and the shape memory alloy component 810 are disposed within the housing 211. The shape memory alloy component 810 is located between the valve 820 and the first heat dissipation port 212. One end of the shape memory alloy component 810 is connected to the inner wall of the housing 211, and the other end is connected to the valve 820. Specifically, one end of the shape memory alloy component 810 is relatively fixed to the housing 211, and the other end is relatively fixed to the valve 820. Under the action of the shape memory alloy component 810, the valve 820 has a first position when it is close to or abuts against the first heat dissipation port 212, and a second position when it is far away from the first heat dissipation port 212. In the first position, the horizontal distance between the valve 820 and the first heat dissipation port 212 is a first distance; in the second position, the horizontal distance between the valve 820 and the first heat dissipation port 212 is a second distance; wherein the first distance is less than the second distance.

[0050] When the second light source 210 is not working, the temperature inside the housing 211 is not high. At this time, the shape memory alloy component 810 is in a contracted state, the valve 820 is in the first position, and the distance between the valve 820 and the first heat dissipation port 212 is small or non-existent. When the second light source 210 is working, the temperature inside the housing 211 rises to a preset temperature. At this time, the shape memory alloy component 810 automatically changes from a contracted state to an extended state, increasing the distance between the valve 820 and the first heat dissipation port 212, reducing airflow resistance, and improving heat dissipation efficiency.

[0051] In this application, as Figure 3 and Figure 5 The first light source module 100 also includes an optical element 120 that cooperates with the first light source 110. The optical element 120 is coaxial with the camera optical path. The optical element 120 is configured to change the light emission direction of the first light source 110 from horizontal light emission to vertical light emission. The vertical light is used to illuminate the surface of the workpiece below.

[0052] The first light source 110 provides the main illumination light, serving as the core light source for observing the surface information of the workpiece. The camera receives the reflected light from the workpiece through the optical element 120 from directly above. Light from flat areas on the workpiece's surface is reflected perpendicularly back to the camera, resulting in a bright image. However, scratches, dents, and other defects cause light to scatter, with only a small amount of light returning to the camera, resulting in a dark image.

[0053] The second light source 210 provides supplementary illumination, highlighting minor surface irregularities and providing different texture information. The second light source 210 is located on the side of the optical element 120 and emits light at an angle. The second light source 210 illuminates from the side at a low angle (e.g., 30°-75°), mainly used to illuminate side defects that the first light source 110 cannot highlight or to provide different contrasts.

[0054] Optical element 120 can be a beam splitter, reflecting the horizontal light from the first light source 110 by 90 degrees into vertical light, and allowing the line of sight of the camera above to pass through vertically. Optical element 120 can also be a right-angle prism, using internal total internal reflection to achieve a 90° reversal of the light path, and its top surface can serve as a camera observation window.

[0055] As can be seen from the above, this application utilizes coaxial light to efficiently reveal the microscopic morphological defects on the surface of a workpiece, while using side light as a supplement to increase the detection capability.

[0056] In this application, the first light source module 100 further includes a housing 130 connected to the outer casing of the first light source 110. The optical element 120 is housed within the housing 130, which provides physical protection for the optical element 120. The optical element 120 can be modularly integrated via the housing 130. The housing 130 has an opening on the side near and opposite to the first light source 110. Light from the first light source 110 enters through the opening and illuminates the optical element 120. The housing 130 also has a first opening 131 directly above the optical element 120 and a second opening 132 directly below the optical element 120. The optical element 120 is tilted to convert the light emitted from the first light source 110, which is parallel to the horizontal plane, into light perpendicular to the horizontal plane. The light from the first light source 110 passes through the optical element 120 and is parallel to the camera's optical axis, effectively eliminating reflection interference.

[0057] The first opening 131 on the housing 130 serves as the camera's optical path inlet, and the second opening 132 serves as the vertical light outlet, forcing the light path to propagate along the designed path and preventing deviation. The openings on the housing 130 ensure that the light from the first light source 110 is accurately incident on the effective area of ​​the optical element 120 and block stray light. In this application, the core optical path of the first light source 110 is encapsulated into an independent, pre-adjustable, and replaceable unit through the housing 130, improving production and maintenance efficiency.

[0058] like Figure 2 As shown, a light path channel 230 is formed on the second light source module 200, the second opening 132 is located above the light path channel 230 and is distributed adjacent to the light path channel 230, and the second light source 210 is located outside the light path channel 230. The light path channel 230 is configured to allow the light from the first light source 110 and the lens of the camera to act on the workpiece.

[0059] The optical path channel 230 realizes the integration and separation of the optical paths of the first light source 110 and the second light source 210 in physical space, and ensures that the camera's field of view can simultaneously receive light signals from both lighting methods.

[0060] In this application, as Figure 1As shown, in one embodiment, a first fine-tuning structure 500 is provided between the first light source module 100 and the first support frame 300. The first fine-tuning structure 500 is configured to adjust the position of the first light source module 100 in the lateral direction.

[0061] In another embodiment, a second fine-tuning structure 600 is provided between the second light source module 200 and the first support frame 300, wherein the second fine-tuning structure 600 is configured to adjust the orientation of the second light source module 200.

[0062] In another embodiment, a first support frame 300 is connected to a second support frame 310, with the second support frame 310 located above the first support frame 300. A third fine-tuning structure 700 is provided between the first support frame 300 and the second support frame 310, and the third fine-tuning structure 700 is configured to adjust the lateral position of the first support frame 300.

[0063] The first fine-tuning structure 500, the second fine-tuning structure 600 and the third fine-tuning structure 700 mentioned above can eliminate or avoid installation errors and improve the adaptability of installation on different equipment.

[0064] like Figure 1 , Figure 11 ,and Figure 12 As shown, the first fine-tuning structure 500 includes first adjusting members 510 disposed at opposite ends of the first light source module 100 and a horizontally extending straight groove 520 disposed on the first support frame 300. A first fastener (not shown) is disposed within the straight groove 520. The first adjusting member 510 has a first hole 511 for screwing into the first fastener. The first adjusting member 510 also has a first marking 512, which measures the displacement of the first adjusting member 510 relative to the first support frame 300. Preferably, the first marking 512 is a scale marking.

[0065] like Figure 1 , Figure 11 and Figure 13As shown, the second fine-tuning structure 600 includes a second adjusting member 610 disposed at both opposite ends of the second light source module 200 and an arc-shaped groove 620 disposed on the first support frame 300. The second adjusting member 610 is rotatably disposed on the first support frame 300 about a rotation axis X. A second fastener (not shown) is disposed within the arc-shaped groove 620. The second adjusting member 610 has a second hole 611 for screwing into the second fastener. The second adjusting member 610 has a second mark 612 for measuring the rotation angle of the second adjusting member 610 relative to the first support frame 300. The first support frame 300 has a first zero-degree line 613 that cooperates with the second mark 612. Through the cooperation of the first zero-degree line 613 and the second mark 612, the rotation angle of the second adjusting member 610 relative to the first support frame 300 can be conveniently displayed. Preferably, the second mark 612 is a scale mark.

[0066] like Figure 1 and Figure 2 As shown, the third fine-tuning structure 700 includes an adjusting block 710 connected to the first support frame 300, a third fastener 720 rotatably mounted on the adjusting block 710, a third sliding groove 311 extending laterally on the second support frame 310, a fourth fastener (not shown) within the third sliding groove 311, and a fourth hole 312 cooperating with the fourth fastener on the first support frame 300. The adjusting block 710 has a third marking 711; preferably, the second marking 612 is a scale marking. The third fine-tuning structure 700 enables fine-tuning of the lateral position of the first support frame 300 relative to the second support frame 310.

[0067] Furthermore, such as Figure 1 As shown, the second support frame 310 is also connected to a third support frame 320. A fourth fine-tuning structure 330 is provided between the second support frame 310 and the third support frame 320. The fourth fine-tuning structure 330 is used to adjust the vertical position of the second support frame 310 relative to the third support frame 320. The fourth fine-tuning structure 330 includes a fourth sliding groove 331 provided on the third support frame 320 and a fifth fastener (not shown) provided in the fourth sliding groove 331. The second support frame 310 is provided with a fifth hole (not shown) that mates with the fifth fastener. The third support frame 320 is provided with a fourth mark 332, and the second support frame 310 is provided with a second zero-degree line 313. Preferably, the fourth mark 332 is a scale mark.

[0068] In this application, multiple second light sources 210 are provided, and the multiple second light sources 210 are divided into two groups of second light sources, which are located on both sides of the reflected light path of the optical element 120. There is a preset distance between the two groups of second light sources in the lateral direction, and the preset distance forms the aforementioned light path channel 230 between the two groups of second light sources. The optical element 120 is located directly above the light path channel 230.

[0069] Furthermore, the number of second light sources 210 is even, and two sets of second light sources are symmetrically distributed on both sides of the optical path channel 230. An even number of second light sources 210 ensures that the number of second light sources in each set is equal. The symmetrical distribution of the two sets of second light sources on both sides of the optical path channel 230 can eliminate the shadows and asymmetry caused by unilateral illumination, making the imaging of the workpiece surface texture or defects more uniform and without directional bias.

[0070] In one embodiment, each group of second light sources includes at least two second light sources 210, and the wavelengths of the at least two second light sources 210 are different. Figure 14 and Figure 15 As shown, two sets of second light source groups are provided on both sides of the optical path channel 230. Each set of second light source groups includes three second light sources 210. The three second light sources 210 are distributed at intervals or adjacent to each other in the circumferential direction of the rotation axis X.

[0071] The three secondary light sources 210 each have LED beads of different colors: red, green, and blue. The color distribution of the three secondary light sources 210 can also be green, red, and blue, or blue, green, and blue, etc. Of course, other colors can also be used for the three secondary light sources 210, but these will not be elaborated upon here.

[0072] In another embodiment, each group of second light sources includes only one second light source 210, and the multiple LED beads on the second light source 210 have different colors. For example, the first LED bead is red, the second LED bead is green, and the third LED bead is blue. The three LED beads form a cycle, and so on.

[0073] For example, multiple LED beads can be divided into several sections, each with a different color. For instance, the first section might have green LEDs, the second section red LEDs, and the third section blue LEDs. Different control strategies can be used to meet different illumination requirements, thus making efficient use of space and resulting in a simpler, more compact overall structure.

[0074] In another embodiment, each group of second light sources includes at least two second light sources 210, and the LEDs on each second light source 210 are of different colors. Multiple LEDs on the same second light source 210 are divided into multiple segments, and the LEDs in the multiple segments are of different colors. For example, the LEDs in the first segment are blue, the LEDs in the second segment are green, and the LEDs in the third segment are red.

[0075] like Figure 15 As shown, the second light source module 200 also includes a pair of side support plates 220, which are respectively disposed at both ends of the plurality of second light sources 210. Each pair of side support plates 220 is provided with a limiting groove 221, and the end of the liquid cooling structure 400 is located within the limiting groove 221, thereby limiting the liquid cooling structure 400 on the second light source 210. A second adjusting member 610 is disposed on the side support plate 220, and the side support plate 220 achieves rotational adjustment with the first support frame 300 through the second adjusting member 610.

[0076] In one embodiment, six second light sources 210 are provided on a pair of side frame plates 220. The six second light sources 210 form two groups of second light sources 210, and each group of second light sources 210 includes three second light sources 210. The three second light sources 210 are symmetrically arranged as a group on the pair of side frame plates 220. The two groups of second light sources 210 are spaced apart in the lateral direction, and the distance between the two groups of second light sources 210 in the lateral direction is the optical path channel 230. The six second light sources 210 are distributed on the side frame plates 220 along an arc direction. The rotation axis X is coaxial with the aforementioned arc.

[0077] The second light source module 200 also includes a pair of connecting plates 240, one end of which is connected to a side frame plate 220 on one side, and the other end of which is connected to a side frame plate 220 on the other side. Multiple second light sources 210 are located within the space enclosed by the pair of side frame plates 220 and the pair of connecting plates 240.

[0078] This application also provides a defect detection device, which includes the light source assembly as described above.

[0079] Obviously, the embodiments described above are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, those skilled in the art can make other variations or modifications without creative effort, and all such variations or modifications should fall within the scope of protection of this application.

Claims

1. A light source assembly for providing a light source for a camera when acquiring image information of a workpiece, characterized in that, include: First support frame (300); The first light source module (100) is disposed on the first support frame (300) and located below the camera. The first light source module (100) includes at least a first light source (110). The second light source module (200) is disposed on the first support frame (300) and located below the first light source module (100). The second light source module (200) includes at least one second light source (210) located below the first light source (110). A liquid cooling structure (400) is disposed on the first light source (110) and the second light source (210), and the liquid cooling structure (400) is configured to dissipate heat from the first light source (110) and the second light source (210); The first light source module (100) further includes an optical element (120) that cooperates with the first light source (110). The optical element (120) is configured to change the light emission direction of the first light source (110) from horizontal to vertical. The second light source (210) is located on the side of the optical element (120) and emits light at an angle.

2. The light source assembly as described in claim 1, characterized in that, The first light source module (100) also includes a housing (130) connected to the outer shell of the first light source (110). The optical element (120) is housed in the housing (130). The housing (130) has an opening on the side near the first light source (110) and opposite to the first light source (110). The light from the first light source (110) enters through the opening and shines on the optical element (120). The housing (130) also has a first opening (131) located directly above the optical element (120) and a second opening (132) located directly below the optical element (120). The optical element (120) is tilted to convert the light emitted from the first light source (110) parallel to the horizontal plane into light perpendicular to the horizontal plane. The optical element (120) is a prism or a beam splitter.

3. The light source assembly as described in claim 1, characterized in that, A first fine-tuning structure (500) is provided between the first light source module (100) and the first support frame (300), wherein the first fine-tuning structure (500) is configured to adjust the lateral position of the first light source module (100); and / or, A second fine-tuning structure (600) is provided between the second light source module (200) and the first support frame (300), wherein the second fine-tuning structure (600) is configured to adjust the orientation of the second light source module (200); and / or, The first support frame (300) is connected to a second support frame (310), the second support frame (310) is located above the first support frame (300), wherein a third fine-tuning structure (700) is provided between the first support frame (300) and the second support frame (310), the third fine-tuning structure (700) is configured to adjust the position of the first support frame (300) in the lateral direction.

4. The light source assembly as described in claim 3, characterized in that, The first fine-tuning structure (500) includes a first adjusting member (510) disposed at both opposite ends of the first light source module (100) and a straight groove (520) disposed on the first support frame (300) and extending laterally. The straight groove (520) is provided with a first fastener, and the first adjusting member (510) is provided with a first hole (511) for screwing with the first fastener.

5. The light source assembly as described in claim 3, characterized in that, The second fine-tuning structure (600) includes a second adjusting member (610) disposed on both opposite ends of the second light source module (200) and an arc-shaped groove (620) disposed on the first support frame (300). The second adjusting member (610) is rotatably disposed on the first support frame (300) about the rotation axis X. A second fastener is disposed in the arc-shaped groove (620). A second hole (611) is provided on the second adjusting member (610) for screwing into the second fastener.

6. The light source assembly as described in claim 1, characterized in that, The second light source (210) is provided in multiple ways, and the multiple second light sources (210) are divided into two groups of second light sources. The two groups of second light sources are respectively located on both sides of the reflected light path of the optical element (120). There is a preset distance between the two groups of second light sources in the horizontal direction. The preset distance forms an optical path channel (230) between the two groups of second light sources. The optical element (120) is located directly above the optical path channel (230).

7. The light source assembly as described in claim 6, characterized in that, The number of the second light source (210) is even, and the two groups of second light sources are symmetrically distributed on both sides of the optical path channel (230). Each group of second light sources includes at least two second light sources (210), and the wavelengths of the at least two second light sources (210) are different; or, Each group of the second light sources includes a second light source (210), and multiple LED beads on the second light source (210) have different colors.

8. The light source assembly as described in claim 1, characterized in that, The second light source (210) has a first heat dissipation vent (212) on its housing (211). A valve structure (800) is provided at the first heat dissipation vent (212). The valve structure (800) includes a shape memory alloy component (810) disposed in the second light source (210) and a valve (820) connected to the shape memory alloy component (810). The shape memory alloy component (810) changes from a contracted state to an extended state in response to the increase in temperature of the second light source (210). The valve (820) moves away from or away from the first heat dissipation vent (212) in response to the change of the shape memory alloy component (810) from a contracted state to an extended state, and moves closer to or blocks the first heat dissipation vent (212) in response to the change of the shape memory alloy component (810) from an extended state to a contracted state.

9. The light source assembly as described in claim 8, characterized in that, The valve structure (800) further includes a movable block (830) slidably disposed within the second light source (210) and a connecting rod (840) connecting the movable block (830) and the valve (820). One end of the shape memory alloy part (810) is disposed on the inner wall of the outer shell (211), and the other end is connected to the movable block (830). One end of the connecting rod (840) is pivotally connected to the movable block (830), and the other end is pivotally connected to the valve (820). The valve (820) is slidably disposed on the outer shell (211). The sliding direction of the movable block (830) is perpendicular to the sliding direction of the valve (820). The movable block (830) slides toward the first heat dissipation port (212) in response to the change of the shape memory alloy part (810) from a contracted state to an extended state. The connecting rod (840) drives the valve (820) to slide in response to the movement of the movable block (830) toward the first heat dissipation port (212) so as to reduce the area of ​​the first heat dissipation port (212) blocked by the valve (820). The movable block (830) moves away from the first heat dissipation port (212) in response to the change of the shape memory alloy part (810) from an extended state to a contracted state. The connecting rod (840) drives the valve (820) to slide in response to the movement of the movable block (830) away from the first heat dissipation port (212), so as to increase the area of ​​the first heat dissipation port (212) blocked by the valve (820).

10. A defect detection device, characterized in that, Includes the light source assembly as described in any one of claims 1 to 9.

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