A combined light source with planar and conical surface partition integration

Abstract

The utility model discloses a kind of combined light source of plane and conical surface partition integration, including the plane light source of being installed in upper portion and the conical surface light source of being installed in the lower portion of plane light source, the conical surface light source includes the first annular bottom plate of being arranged in upper portion and the second annular bottom plate of being arranged in lower portion, the first annular bottom plate and second annular bottom plate between being installed with several independent control lighting sector, the lighting sector is inclined to emit light, and it is inclined to be irradiated on the side of product to be detected;The plane light source is installed in the first annular bottom plate upper portion, and the plane light source is emitted light from the upper portion of conical surface light source downward, and light is irradiated on the upper surface of product to be detected by passing through the first annular bottom plate and second annular bottom plate;The reflected light of the upper surface and side of product to be detected is photographed and collected by being arranged in the camera of plane light source upper portion;The utility model passes through with plane light source and conical surface light source integration, and conical surface light source can also be controlled by partition simultaneously, to cover and irradiate workpiece surface.

Description

Technical Field

[0001] This utility model relates to the field of combined light source technology, and in particular to a combined light source that integrates planar and conical partitions. Background Technology

[0002] In industrial machine vision inspection, the choice of light source directly determines the image quality. For workpieces with complex three-dimensional shapes and highly reflective surfaces, such as metal shells, galvanized parts, and stamped parts, existing lighting solutions have inherent defects: If a single planar light source is used, although it can provide uniform illumination in the vertical direction and effectively suppress random reflections in the lower planar area, which is beneficial for detecting planar scratches, its vertical light path is insufficient for illuminating the edges of concave and convex surfaces, resulting in extremely low contrast for three-dimensional defects, such as dents and collapsed edges, making imaging difficult and creating blind spots. If a single ring light source or dome light source is used, it can provide multi-angle illumination and enhance the edge contour to some extent. However, the light is difficult to cover the exact center area of ​​the workpiece and is prone to forming strong, irregular light spots on curved surfaces, masking real defects. At the same time, it cannot effectively suppress reflections on the front plane, resulting in a low signal-to-noise ratio.

[0003] Existing lighting solutions can also use different light sources to take multiple shots, but this is inefficient and has registration problems. Therefore, there is an urgent need for an integrated lighting solution that can simultaneously solve the lighting needs of planar and curved surfaces, solve the problems of incomplete light spot coverage and insufficient contrast in the detection of defects on concave and convex reflective curved surfaces, eliminate interference, and generate high-quality images in one go. Utility Model Content

[0004] The purpose of this invention is to overcome the technical defects of existing single light sources that cannot simultaneously illuminate both planar and curved surfaces. It provides a combined light source that integrates planar and conical light sources. By integrating and combining planar and conical light sources, and with the conical light source also being able to be controlled in sections, it achieves coordinated vertical and inclined lighting, covering the planar area and side curved surface of the workpiece, effectively suppressing high reflectivity interference, and improving the efficiency of photographic inspection.

[0005] To achieve the above objectives, this utility model provides a combined light source integrating planar and conical partitions, including a planar light source mounted on the upper part and a conical light source mounted on the lower part of the planar light source. The conical light source includes a first annular base plate mounted on the upper part and a second annular base plate mounted on the lower part. A plurality of independently controlled illumination fan-shaped areas are installed between the first and second annular base plates. The illumination fan-shaped areas emit light at an angle, obliquely illuminating the side of the product to be inspected. The planar light source is mounted on the upper part of the first annular base plate. The planar light source emits light downward from the upper part of the conical light source. The light passes through the first and second annular base plates and illuminates the upper surface of the product to be inspected. The reflected light from the upper surface and side of the product to be inspected is captured by a camera mounted on the upper part of the planar light source.

[0006] Preferably, the conical light source further includes a connecting plate disposed between the first annular base plate and the second annular base plate, the upper end of the connecting plate being connected to the first annular base plate and the lower end being connected to the second annular base plate; a first PCB board is mounted on the inner side of the connecting plate, and a plurality of first LED beads are mounted on the first PCB board, the first PCB board being inclined, and the first LED beads emitting light at an inclined angle.

[0007] Preferably, the upper end of the connecting plate is provided with a first vertical part, which is connected to the side of the first annular base plate; the lower end of the connecting plate is provided with a second vertical part, which is connected to the side of the second annular base plate; the middle part of the connecting plate is provided with a first inclined surface, and the first PCB board is inclinedly disposed on one side of the first inclined surface.

[0008] Preferably, the conical light source further includes a diffuser plate disposed on one side of the first PCB board, one end of which is fitted inside the first annular base plate and the other end is connected to the second annular base plate; the light emitted by the first LED lamp bead at an angle is emitted at an angle through the diffuser plate.

[0009] Preferably, the diffuser plate includes a second inclined surface and a lower connecting horizontal surface, the bottom of the first annular base plate is provided with a first receiving groove, the second inclined surface is inserted into the first receiving groove, and the connecting horizontal surface is bolted to the upper second annular base plate.

[0010] Preferably, the bottom of the first annular base plate is further provided with a second receiving groove, the first PCB board is inserted into the second receiving groove, and is fixedly connected to the first inclined surface by connecting bolts.

[0011] Preferably, the conical light source further includes a plurality of first power lines, a first groove is provided on the first vertical part, a second groove is provided on the first annular base plate, the first groove and the second groove correspond to each other, and the first power lines pass through the first groove and the second groove in sequence to be electrically connected to the first PCB board to provide power to the first LED lamp beads and drive the first LED lamp beads to emit light.

[0012] Preferably, the planar light source includes a bottom support plate connected to a first annular base plate. The bottom support plate has a third groove in the middle and is connected to the first annular base plate. Several enclosure blocks are also installed around the bottom support plate. A coated light guide plate is installed between the enclosure blocks and the bottom support plate. A third receiving groove is provided between the enclosure blocks, the bottom support plate, and the coated light guide plate. A second PCB board is installed inside the third receiving groove. Several second LED beads are installed on the second PCB board. The second LED beads emit light, which shines downward onto the upper surface of the product to be tested through the coated light guide plate.

[0013] Preferably, the upper part of the coated light guide plate is also equipped with an intensifying lens, and the enclosure block is provided with an L-shaped limiting groove, which limits the intensifying lens around its perimeter; the planar light source also includes a second power line, and the enclosure block is provided with a fourth groove, through which the second power line passes and is electrically connected to the second PCB board to provide power to the second LED lamp bead and drive the second LED lamp bead to emit light.

[0014] Preferably, the side of the second PCB board away from the second LED bead is in contact with the enclosure block via a thermally conductive silicone pad; the outer side of the enclosure block is provided with several heat dissipation grooves.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention integrates a planar light source and a conical light source to form a combined light source. The planar light source is located at the top, and the conical light source is located at the bottom. The planar light source illuminates the upper surface of the product under inspection, suppressing orthogonal reflection interference and improving the contrast of planar defects. The conical light source illuminates the sides and edge curved surfaces of the product under inspection at an inclined angle, enhancing the three-dimensional structural contour and effectively highlighting defects such as bumps and collapsed edges. The planar and conical light sources are independently powered and independently controlled, and the light intensity ratio and incident angle can be dynamically optimized according to different workpiece materials and shapes to avoid light spot overlap interference, ensure imaging uniformity and signal-to-noise ratio, acquire complete defect information at once, and improve detection efficiency and accuracy. Furthermore, the conical light source is also equipped with several independently controlled illumination fan-shaped areas, and the precise dimming and switching control of the illumination fan-shaped areas is realized through a driving circuit. According to the distribution characteristics of edge defects of the product under inspection, the illumination fan-shaped areas at corresponding angles can be selectively turned on to achieve local high-precision supplementary lighting, enhance the light and shadow contrast of specific areas, and facilitate the capture of subtle defects. At the same time, it reduces the interference of stray light on the imaging system and improves the stability and repeatability of the optical inspection system. Attached Figure Description

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

[0018] Figure 1 This is a schematic diagram of the structure of a combined light source integrating planar and conical partitions provided by this utility model;

[0019] Figure 2 This is a cross-sectional schematic diagram of a combined light source integrating planar and conical partitions provided by this utility model;

[0020] Figure 3 This is a schematic diagram of the lighting sector area provided by this utility model;

[0021] Figure 4 This is a front structural diagram of the conical light source provided by this utility model;

[0022] Figure 5 This is a schematic diagram of the bottom structure of the conical light source provided by this utility model;

[0023] Figure 6 This is a cross-sectional schematic diagram of the conical light source provided by this utility model;

[0024] Figure 7 This is an exploded view of the conical light source provided by this utility model;

[0025] Figure 8 This is a schematic diagram of the planar light source provided by this utility model;

[0026] Figure 9 This is a cross-sectional schematic diagram of the planar light source provided by this utility model;

[0027] Figure 10 This is an exploded view of the planar light source provided by this utility model;

[0028] Figure 11 This utility model provides a control principle diagram for a combined light source that integrates planar and conical partitions.

[0029] The diagram includes:

[0030] 1. Planar light source; 2. Conical light source; 22. First annular base plate; 23. Second annular base plate; 21. Illumination sector area; 10. Product to be tested; 9. Camera; 24. Connecting plate; 25. First PCB board; 26. First LED bead; 241. First vertical part; 242. Second vertical part; 243. First inclined surface; 27. Diffuser plate; 271. Second inclined surface; 272. Connecting horizontal surface; 221. First receiving groove; 222. Second receiving groove; 58. First power cord; 57. First groove; 56. Second groove; 11. Bottom support plate; 111. Third groove; 12. Enclosure block; 13. Coated light guide plate; 14. Third receiving groove; 15. Second PCB board; 16. Second LED bead; 17. Lens enhancer; 122. L-shaped limiting groove; 41. Second power cord; 42. Fourth groove; 121. Heat dissipation groove. Detailed Implementation

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are one embodiment of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Please refer to Figures 1 to 11 This utility model provides a combined light source that integrates planar and conical partitions.

[0033] like Figure 1As shown, the combined light source comprises two parts: a planar light source 1 and a conical light source 2, which are fixedly connected by connecting bolts. The planar light source 1 is located above the conical light source 2, and the two are coaxially arranged in the vertical direction to form an integrated structure. The combined light source provides uniform vertical downward illumination through the planar light source 1 for detecting the planar features of the upper surface of the product 10 under inspection, while the conical light source 2 provides ring illumination at an angle to highlight the details of the edges and sides of the product 10 under inspection. The planar light source 1 and the conical light source 2 complement and cooperate with each other to meet the multi-angle, all-round illumination needs of the product 10 under inspection, effectively eliminating shadows and reflection interference.

[0034] like Figure 3 As shown, the conical light source 2 includes a first annular base plate 22 disposed at the upper part and a second annular base plate 23 disposed at the lower part. A plurality of independently controlled illumination fan-shaped areas 21 are installed between the first annular base plate 22 and the second annular base plate 23. The illumination fan-shaped areas 21 emit light at an angle, which is obliquely irradiated onto the side of the product 10 to be tested. In this embodiment, the illumination fan-shaped areas 21 are provided with six parts, each part occupying 60°. Each illumination fan-shaped area 21 is evenly distributed along the circumference and can be controlled by an independent circuit to achieve time-sharing or combined lighting to meet the needs of different detection angles and brightness.

[0035] In this embodiment, as Figure 1 As shown, the first annular base plate 22 and the second annular base plate 23 are both hollow structures. The planar light source 1 emits light downward from the top of the conical light source 2. The light passes through the first annular base plate 22 and the second annular base plate 23 and illuminates the upper surface of the product 10 to be tested.

[0036] In this embodiment, the planar light source 1 and the conical light source 2 can simultaneously and separately emit illumination light to the product 10 to be tested, such as... Figure 2 As shown, the reflected light from the upper surface and sides of the product to be tested 10 is captured by a camera 9 located on the upper part of the planar light source 1.

[0037] The camera 9 adjusts the shooting angle and exposure parameters through the control system. Combined with the coordinated illumination of the planar light source 1 and the conical light source 2, it can clearly capture the surface texture and contour features of the product 10 under different lighting conditions.

[0038] By independently controlling the illumination sector 21 in separate zones, multi-angle visual inspection can be achieved without changing the product's position, improving inspection accuracy and efficiency. This combined light source has a compact structure and is suitable for automated optical inspection equipment, with broad application prospects, especially in the inspection of appearance defects in electronic components and precision parts.

[0039] Furthermore, by optimizing the tilt angle and luminous intensity of the illumination sector 21, the ability to identify features such as minute chamfers, scratches, or burrs can be further enhanced. The control system presets multiple illumination modes according to the detection task, enabling rapid switching and precise matching to ensure stable imaging quality even on complex surface materials.

[0040] like Figure 4 and Figure 5 As shown, the first annular base plate 22 and the second annular base plate are connected by a connecting plate 24, so that the first annular base plate 22, the second annular base plate 23 and the connecting plate 24 are connected together to form a stable whole. The internal space is used to install the first PCB board 25, the first LED beads 26 and the diffuser plate 27. Specifically, the upper end of the connecting plate 24 is connected to the first annular base plate 22 and the lower end is connected to the second annular base plate 23. The first PCB board 25 is installed on the inner side of the connecting plate 24. The first LED beads 26 are evenly distributed on the first PCB board 25 and maintain a preset distance from the diffuser plate 27 to ensure that the light is evenly emitted after diffusion. The first LED beads 26 are connected by six independent circuits and independently controlled by six first power lines 58 to realize the regional control of the lighting sector 21 and the brightness adjustment, thereby meeting different detection requirements.

[0041] like Figure 6 As shown, the first PCB board 25 is tilted, and the first LED beads 26 emit light at an angle. The tilted first PCB board 25 causes the light emitted by the first LED beads 26 to be projected onto the diffuser plate 27 at a specific angle. After scattering, the light is evenly illuminated on the side of the product 10 to be tested, effectively reducing light spots and shadows and improving the clarity of the side image. The diffuser plate 27 is made of a high-transmittance frosted material, which effectively eliminates bright spots and shadows in point light source imaging, making the light softer and more uniform.

[0042] like Figure 1 As shown, the upper end of the connecting plate 24 is provided with a first vertical part 241, which is connected to the side of the first annular base plate 22. The lower end of the connecting plate 24 is provided with a second vertical part 242, which is connected to the side of the second annular base plate 23. The middle part of the connecting plate 24 is provided with a first inclined slope 243, and the first PCB board 25 is inclinedly disposed on one side of the first inclined slope 243.

[0043] In this embodiment, as Figure 6 As shown, the first PCB board 25 is closely attached to one side of the first inclined surface 243 to ensure stable installation and precise and controllable angle, thereby ensuring the consistency and stability of light projection; the inclination angle of the first inclined surface 243 is between 30° and 60°, which can be flexibly designed according to actual lighting needs to optimize the light path distribution.

[0044] like Figure 6 As shown, one end of the diffuser plate 27 is fitted inside the first annular base plate 22, and the other end is connected to the second annular base plate 23; the light emitted by the first LED bead 26 is emitted at an angle through the diffuser plate 27.

[0045] Specifically, the diffuser plate 27 includes a second inclined surface 271 and a lower connecting horizontal surface 272. The bottom of the first annular base plate 22 is provided with a first receiving groove 221. The second inclined surface 271 is inserted into the first receiving groove 221. The connecting horizontal surface 272 is bolted to the upper second annular base plate 23.

[0046] The second inclined surface 271 is set parallel to the first inclined surface 243 to ensure that the light projection path is consistent and further improve the uniformity of light output; the connecting horizontal surface 272 is fastened to the second annular base plate 23 by bolts to ensure the stability and sealing of the installation of the diffuser plate 27.

[0047] The bottom of the first annular base plate 22 is also provided with a second receiving groove 222. The first PCB board 25 is inserted into the second receiving groove 222 and fixedly connected to the first inclined surface 243 by connecting bolts. The second receiving groove 222 limits the position of the first PCB board 25, and the connecting bolts achieve precise fixation. The contact surface between the first PCB board 25 and the first inclined surface 243 is provided with a thermally conductive silicone layer to improve heat dissipation efficiency and ensure the stability of the first LED bead 26 during long-term operation. The thermally conductive silicone layer is tightly attached to the first PCB board 25 and the first inclined surface 243, effectively reducing thermal resistance and improving overall heat dissipation performance.

[0048] In this embodiment, the conical light source 2 is provided with six first power lines 58, which are evenly distributed around the periphery of the conical light source 2 and electrically connected to the power supply terminals on the first PCB board 25. Specifically, the first vertical part 241 is provided with a first groove 57, and the first annular base plate 22 is provided with a second groove 56. The first groove 57 and the second groove 56 correspond to each other. The first power lines 58 pass through the first groove 57 and the second groove 56 in sequence and are electrically connected to the first PCB board 25 to provide power to the first LED lamp beads 26 and drive the first LED lamp beads 26 to emit light. When the first power lines 58 pass through the first groove 57 and the second groove 56, they are laid along a predetermined routing path to avoid bending damage and ensure reliable electrical connection. The power supply terminals are symmetrically distributed on the edge of the first PCB board 25 to make the current distribution uniform, reduce local temperature rise, and improve the overall working stability of the light source. After the light is emitted by the first LED bead 26, it is refracted and diffused by the second inclined surface 271 to achieve uniform light output at a large angle, effectively reducing glare and dark areas; in conjunction with the thermally conductive silicone layer to continuously dissipate heat, it ensures the consistency of light effect and the life of the device under long-term operation.

[0049] like Figure 8 As shown, the planar light source 1 includes a bottom support plate 11, and the bottom support plate 11 has a third groove 111 in the middle, which is connected to the first annular base plate 22; to realize the connection and superposition of the light path, so that the light emitted by the planar light source 1 is introduced into the light path system of the conical light source 2 through the third groove 111 to form a composite light output mode; the reflected light from the upper surface and side of the product to be tested 10 is also returned to the imaging system through the connection structure between the third groove 111 and the first annular base plate 22.

[0050] To fix and limit the second PCB board 15, the coated light guide plate 13, and the intensifying lens 17, four surrounding blocks 12 are installed around the bottom support plate 11. The four surrounding blocks 12 form a quadrilateral surrounding structure, which circumferentially limits the second PCB board 15, the coated light guide plate 13, and the intensifying lens 17. The coated light guide plate 13 is installed between the surrounding blocks 12 and the bottom support plate 11. A third receiving groove 14 is provided between the surrounding blocks 12, the bottom support plate 11, and the coated light guide plate 13. The third receiving groove 14 is used to receive and fix the second PCB board 15. There are four third receiving grooves 14, so that there are also four second PCB boards 15, which are respectively installed in the third receiving groove 14 inside each surrounding block. The second PCB board 15 integrates a second LED bead 16. The light emitted by the LED bead 16 is uniformly guided by the coated light guide plate 13 and shines downward onto the upper surface of the product 10 to be tested.

[0051] like Figure 9As shown, the upper part of the coated light guide plate 13 is also equipped with an intensifying lens 17, and the enclosure block 12 is provided with an L-shaped limiting groove 122. The intensifying lens 17 is inserted into the L-shaped limiting groove 122 around its perimeter, and the L-shaped limiting groove 122 limits the intensifying lens 17 around its perimeter.

[0052] like Figure 10 As shown, the planar light source 1 also includes a second power line 41, and the enclosure block 12 is provided with a fourth groove 42. The second power line 41 passes through the fourth groove 42 and is electrically connected to the second PCB board 15 to provide power to the second LED lamp bead 16 and drive the second LED lamp bead 16 to emit light.

[0053] The second power line 41 is laid along the fourth groove 42 to avoid bending damage and ensure stable power transmission; multiple second LED beads 16 work together, combined with the optical diffusion characteristics of the coated light guide plate 13, to achieve highly uniform illumination of the upper surface of the product 10 to be inspected; the lens 17 effectively reduces light reflection loss at the interface and improves light extraction efficiency; the entire planar light source 1 and the conical light source 2 work together to form a multi-angle, multi-layer composite lighting environment, which significantly enhances the imaging system's ability to identify minute defects on the product surface and meets the requirements of high-precision visual inspection.

[0054] To increase thermal conductivity, the side of the second PCB board 15 furthest from the second LED bead 16 contacts the enclosure block 12 via a thermally conductive silicone pad. The thermally conductive silicone pad efficiently conducts the heat generated by the second LED bead 16 during operation to the enclosure block 12, and then the heat is quickly dissipated to the surrounding environment through the heat dissipation groove 121 on the outside of the enclosure block 12, effectively reducing the operating temperature of the second LED bead 16, delaying light decay, and improving the stability of the light source. The enclosure block has multiple functions, including structural support, optical positioning, and efficient heat dissipation, reflecting a deep integration of mechanical design and thermal management. The overall structure is compact and reliable, adapting to the needs of long-term continuous operation, ensuring lighting quality while providing continuous and stable hardware support for high-precision visual inspection.

[0055] like Figure 11 As shown, the combined light source is connected to the intelligent controller via a cable, and the controller is then connected to an industrial computer (PC) or programmable logic controller (PLC) via a network port or I / O port. The camera is connected to the controller's synchronization output port via a trigger wire.

[0056] Adjustable parameter settings: Set the lighting scheme in the PC software:

[0057] Option 1: Plane scratch detection: Mainly use a planar coaxial light source with a brightness of 80%, and turn off the cone-shaped zone light source or use 10% low brightness supplementary light.

[0058] Option 2: Edge collision detection: The brightness of the planar coaxial light source is set to 20% (providing only basic lighting), and all 6 zones of the conical zoned light source are enabled with a brightness of 100% to highlight edge shadows from different angles.

[0059] Option 3: Comprehensive Detection: Employing a single-trigger, sequential lighting mode. Within a single camera exposure time, the controller first triggers a planar coaxial light source to briefly flash (μs level) to capture planar scratches. After a very short interval, it then triggers a conical partitioned light source to flash and capture edge impacts. The camera captures an image that combines the two lighting effects.

[0060] The assembly steps of the combined light source;

[0061] Step S1: Assemble the planar light source 1; take out four enclosure blocks 12 and install a second PCB board 15 inside the four enclosure blocks 12. The second PCB board 15 integrates a second LED lamp bead 16. The side of the second PCB board 15 away from the second LED lamp bead 16 contacts the enclosure block 12 through a thermally conductive silicone pad, and the second PCB board 15 is bonded and fixed to the enclosure block 12.

[0062] Step S2: The second power line 41 passes through the fourth groove 42 and is electrically connected to the second PCB board 15 to provide power to the second LED lamp bead 16 and drive the second LED lamp bead 16 to emit light;

[0063] Step S3: Take out the bottom support plate 11, place the coated light guide plate 13 and the intensifying lens 17 on the top of the bottom support plate 11 in sequence, and place the four surrounding blocks 12 in a quadrilateral shape around the bottom support plate 11. Insert the coated light guide plate 13 into the inside of the surrounding blocks 12 to form the third receiving groove 14. Insert the intensifying lens 17 into the L-shaped limiting groove 122. Use connecting bolts to fix the bottom support plate 11 and the surrounding blocks 12 together; thus, the planar light source 1 is assembled.

[0064] Step S4: Assemble the conical light source 2; set the first annular base plate 22 at the top and the second annular base plate 23 vertically at the bottom, the connecting plate 24 is used to connect the first annular base plate 22 and the second annular base plate 23, wherein the first groove 57 and the second groove 56 correspond to each other;

[0065] Step S5: The first PCB board 25 is inserted into the second receiving groove 222 and fixedly connected to the first inclined surface 243 by connecting bolts. The second receiving groove 222 limits the position of the first PCB board 25, and the connecting bolts achieve precise fixation; the contact surface between the first PCB board 25 and the first inclined surface 243 is provided with a thermally conductive silicone layer to improve heat dissipation efficiency; the first LED beads 26 are evenly distributed on the first PCB board 25.

[0066] Step S6: Six first power lines 58 are evenly distributed around the conical light source 2, pass through the first groove 57 and the second groove 56 in sequence, and are electrically connected to the first PCB board 25 to provide power to the first LED lamp bead 26 and drive the first LED lamp bead 26 to emit light.

[0067] Step S7: The second inclined surface 271 is inserted into the first receiving groove 221, and the connecting horizontal surface 272 is bolted to the upper second annular base plate 23; thereby completing the assembly of the conical light source 2;

[0068] Step S8: Assemble the planar light source 1 and the conical light source 2, and connect the planar light source 1 with the first annular base plate 22 through the connecting bolts to complete the assembly and fixation of the combined light source.

[0069] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0070] First, by combining planar light source 1 and conical light source 2, full-coverage, blind-spot-free lighting is achieved; specifically, the planar light source 1 covers the central planar area, while the conical light source 2 covers the surrounding edges and curved surfaces, fundamentally eliminating lighting dead zones.

[0071] Secondly, the conical light source 2 can selectively enhance the illumination from specific directions by independently controlling the brightness of each illumination sector 21, so that the concave and convex defects produce a strong contrast between light and dark, and the imaging contrast is improved by more than 40% (calculated by the standard deviation of image grayscale); furthermore, the illumination sector 21 provides uniform supplementary light from multiple angles, avoiding strong reflective spots caused by a single-angle point light source.

[0072] Furthermore, it can capture all features at once, increasing the overall defect detection rate of complex workpieces from below 85% to over 99%, while improving detection efficiency (number of workpieces detected per unit time) by approximately 30% (without needing to change light sources multiple times for shooting).

[0073] Finally, the conical light source 2 allows users to independently control each illumination sector 21, enabling them to select specific zones to be illuminated based on the specific shape and defect location of the workpiece being tested, thereby achieving directional enhanced illumination and further optimizing the detection effect of specific defects.

[0074] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model shall be considered equivalent substitutions and shall be included within the protection scope of the present utility model.

Claims

1. A combined light source integrating planar and conical partitions, characterized in that: The device includes a planar light source (1) mounted on the upper part and a conical light source (2) mounted on the lower part of the planar light source (1). The conical light source (2) includes a first annular base plate (22) mounted on the upper part and a second annular base plate (23) mounted on the lower part. Several independently controlled illumination fan-shaped areas (21) are installed between the first annular base plate (22) and the second annular base plate (23). The illumination fan-shaped areas (21) emit light at an angle and illuminate the side of the product to be tested (10) at an angle. The planar light source (1) is mounted on the upper part of the first annular base plate (22). The planar light source (1) emits light downward from the upper part of the conical light source (2). The light passes through the first annular base plate (22) and the second annular base plate (23) and illuminates the upper surface of the product to be tested (10). The reflected light from the upper surface and the side of the product to be tested (10) is captured by a camera (9) mounted on the upper part of the planar light source (1).

2. The combined light source integrating planar and conical partitions according to claim 1, characterized in that: The conical light source (2) further includes a connecting plate (24) disposed between the first annular base plate (22) and the second annular base plate (23). The upper end of the connecting plate (24) is connected to the first annular base plate (22), and the lower end is connected to the second annular base plate (23). A first PCB board (25) is installed on the inner side of the connecting plate (24). A plurality of first LED beads (26) are installed on the first PCB board (25). The first PCB board (25) is inclined, and the first LED beads (26) emit light at an inclined angle.

3. The combined light source integrating planar and conical partitions according to claim 2, characterized in that: The upper end of the connecting plate (24) is provided with a first vertical part (241), which is connected to the side of the first annular base plate (22). The lower end of the connecting plate (24) is provided with a second vertical part (242), which is connected to the side of the second annular base plate (23). The middle part of the connecting plate (24) is provided with a first inclined slope (243), and the first PCB board (25) is inclinedly disposed on one side of the first inclined slope (243).

4. The combined light source integrating planar and conical partitions according to claim 3, characterized in that: The conical light source (2) also includes a diffuser plate (27) disposed on one side of the first PCB board (25). One end of the diffuser plate (27) is inserted inside the first annular base plate (22), and the other end is connected to the second annular base plate (23). The light emitted by the first LED lamp bead (26) is obliquely emitted through the diffuser plate (27).

5. The combined light source integrating planar and conical partitions according to claim 4, characterized in that: The diffuser plate (27) includes a second inclined surface (271) and a lower connecting horizontal surface (272). The bottom of the first annular base plate (22) is provided with a first receiving groove (221). The second inclined surface (271) is inserted into the first receiving groove (221). The connecting horizontal surface (272) is bolted to the upper second annular base plate (23).

6. The combined light source integrating planar and conical partitions according to claim 5, characterized in that: The bottom of the first annular base plate (22) is also provided with a second receiving groove (222). The first PCB board (25) is inserted into the second receiving groove (222) and fixedly connected to the first inclined surface (243) by connecting bolts.

7. The combined light source integrating planar and conical partitions according to claim 6, characterized in that: The conical light source (2) also includes several first power lines (58). The first vertical part (241) is provided with a first groove (57), and the first annular base plate (22) is provided with a second groove (56). The first groove (57) and the second groove (56) correspond to each other. The first power lines (58) pass through the first groove (57) and the second groove (56) in sequence and are electrically connected to the first PCB board (25) to provide power to the first LED lamp bead (26) and drive the first LED lamp bead (26) to emit light.

8. The combined light source integrating planar and conical partitions according to claim 1, characterized in that: The planar light source (1) includes a bottom support plate (11), which is connected to a first annular base plate (22). A third groove (111) is provided in the middle of the bottom support plate (11) and is connected to the first annular base plate (22). Several enclosure blocks (12) are also installed around the bottom support plate (11). A coated light guide plate (13) is installed between the enclosure blocks (12) and the bottom support plate (11). A third receiving groove (14) is provided between the enclosure blocks (12), the bottom support plate (11) and the coated light guide plate (13). A second PCB board (15) is installed inside the third receiving groove (14). Several second LED beads (16) are installed on the second PCB board (15). The second LED beads (16) emit light and shine it downward onto the upper surface of the product to be tested (10) through the coated light guide plate (13).

9. A combined light source integrating planar and conical partitions according to claim 8, characterized in that: The upper part of the coated light guide plate (13) is also equipped with an intensifying lens (17), and the enclosure block (12) is provided with an L-shaped limiting groove (122). The L-shaped limiting groove (122) limits the intensifying lens (17) around its perimeter. The planar light source (1) also includes a second power line (41). The enclosure block (12) is provided with a fourth groove (42). The second power line (41) passes through the fourth groove (42) and is electrically connected to the second PCB board (15) to provide power to the second LED lamp bead (16) and drive the second LED lamp bead (16) to emit light.

10. A combined light source integrating planar and conical partitions according to claim 9, characterized in that: The side of the second PCB board (15) away from the second LED bead (16) is in contact with the enclosure block (12) through a thermally conductive silicone pad; the enclosure block (12) is provided with several heat dissipation grooves (121) on its outer side.

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