A coaxial and conical surface partition controlled composite light source

Abstract

The utility model discloses a coaxial and conic surface partition control's composite light source, including composite light source body, the composite light source body includes the coaxial light source of installing in upper part and installs the conical light source in lower part, the coaxial light source includes the first light source subassembly of setting at one side, the first light source subassembly horizontal sends out first light, the first light is shot down through the inclined beam splitter, the first light is irradiated to the surface of the product to be detected through the conical light source downwards, the conical light source includes a plurality of independent control's illumination sector, and the illumination sector is the inclined conic surface, and the illumination sector is inclined and sends out second light, and the second light is inclined and irradiated to the surface of the product to be detected, the first light and second light are shot through the reflection of the product to be detected and are set on the camera of the coaxial light source upper portion and are photographed and are collected, the utility model discloses can adapt to complex curved surface and high reflectivity workpiece simultaneously, and has improved the accuracy and reliability of detection.

Description

Technical Field

[0001] This utility model relates to the field of composite light source technology, and in particular to a composite light source with coaxial and conical partition control. Background Technology

[0002] In industrial machine vision inspection, the lighting scheme is crucial to image quality. This is especially important for workpieces with complex curved surfaces and high reflectivity, such as metal cans, bottle caps, and ceramic components, to detect surface defects.

[0003] Existing lighting methods have significant limitations: while parallel coaxial light can effectively suppress specular reflection and highlight scratches and blemishes in flat areas, when used to illuminate curved surfaces, the defect contrast is significantly weakened (typically ≤30%), and the edge areas of the curved surface are insufficiently illuminated (incomplete light spot coverage) because the light cannot be reflected perpendicularly to the lens, resulting in missed detection of edge defects (coverage ≈70%).

[0004] If ring lights, strip lights, dome lights, etc. are used, they can provide illumination from the side and enhance the contour of curved edges. However, these light sources are prone to forming irregular light spots or strong reflections on flat or curved surfaces, interfering with the imaging of real defects (SNR<15dB), and also have illumination blind spots.

[0005] If a multi-source time-division triggering method is used: multiple shots are required, resulting in low efficiency, and optical path calibration is complicated.

[0006] Therefore, there is a lack of a composite light source in the existing technology that can be applied to both complex curved surfaces and high reflectivity workpieces. Utility Model Content

[0007] The purpose of this invention is to overcome the above-mentioned defects in the prior art and provide a composite light source with coaxial and conical partition control, which can simultaneously adapt to different complex curved surfaces and high reflectivity workpiece surfaces, achieve full coverage and interference-free illumination of workpiece edges and workpiece planes, and significantly improve the accuracy and reliability of machine vision inspection.

[0008] To achieve the above objectives, this utility model provides a composite light source with coaxial and conical surface partition control, comprising a composite light source body, wherein the composite light source body includes a coaxial light source mounted on the upper part and a conical light source mounted on the lower part; the coaxial light source includes a first light source assembly disposed on one side, the first light source assembly horizontally emitting a first light beam, the first light beam being shot downwards through an inclined beam splitter, and the first light beam passing downwards through the conical light source to illuminate the surface of the product to be inspected; the conical light source includes several independently controlled illumination fan-shaped areas, the illumination fan-shaped areas being inclined conical surfaces, the illumination fan-shaped areas obliquely emitting a second light beam, the second light beam obliquely illuminating the surface of the product to be inspected; the first light beam and the second light beam are reflected by the product to be inspected and captured by a camera disposed on the upper part of the coaxial light source.

[0009] Preferably, the coaxial light source and the conical light source are connected by an L-shaped connector. The coaxial light source also includes an external housing, and the conical light source also includes a first annular base plate. One side of the L-shaped connector is connected to the housing, and the lower part is connected to the first annular base plate.

[0010] Preferably, the conical light source further includes a second annular base plate installed below the first annular base plate, and the lighting sector is disposed between the first annular base plate and the second annular base plate. The lighting sector includes a first PCB board and a plurality of first LED beads installed on the first PCB board. The first PCB board is inclined, and the first LED beads emit second light at an inclined angle.

[0011] 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 is connected to the first annular base plate, and the lower end is connected to the second annular base plate. 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 slope, and the first PCB board is inclinedly disposed on one side of the first inclined slope.

[0012] Preferably, the conical light source further includes a diffuser plate disposed on one side of the first PCB board. One end of the diffuser plate 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. 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. The connecting horizontal surface is bolted to the upper second annular base plate. The bottom of the first annular base plate is also provided with a second receiving groove. The first PCB board is inserted into the second receiving groove and fixedly connected to the first inclined surface by connecting bolts.

[0013] 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 tilt and emit second light.

[0014] Preferably, the coaxial light source further includes a Fresnel lens installed between the first light source assembly and the beam splitter. The first light beam passes through the Fresnel lens to reach the beam splitter. The first light source assembly, the Fresnel lens, and the beam splitter are arranged horizontally and sequentially inside the housing.

[0015] Preferably, one end of the housing is provided with a mounting groove, and the first light source assembly is installed inside the mounting groove and connected to the housing; the first light source assembly includes a lamp holder connected to the mounting groove and a mounting base installed inside the lamp holder; one end of the mounting base is provided with a second PCB board, and the other end is provided with a second power line; a second LED bead is installed on the second PCB board, and the second power line passes through the mounting base and is electrically connected to the second PCB board to drive the second LED bead to emit the first light.

[0016] Preferably, the mounting base moves longitudinally back and forth inside the lamp holder to adjust the distance between the second LED bead and the Fresnel lens; the mounting base is provided with a longitudinal groove, and the lamp holder is equipped with an adjusting bolt, the end of which is inserted into the longitudinal groove; when the adjusting bolt is loosened, the mounting base moves longitudinally back and forth along the longitudinal groove; when the adjusting bolt is tightened, the mounting base and the lamp holder are fixed together.

[0017] Preferably, the housing includes a rear end plate connected to the lamp holder, a lower bottom plate mounted on the lower part of the rear end plate, an upper cover plate mounted on the upper part of the rear end plate, a left side plate mounted on one side of the lower bottom plate, a right side plate mounted on the other side of the lower bottom plate, and a front end plate mounted on one end of the lower bottom plate. The lower bottom plate has a first through-slot through which the first light passes, and a third groove on the lower bottom plate. The lower part of the Fresnel lens is inserted into the third groove. The lower part of the front end plate has a fourth groove. The lower part of the beam splitter is inserted into the fourth groove, and its upper part rests against the upper part of the Fresnel lens. The left side plate and the right side plate both have inclined fifth grooves, and both sides of the beam splitter are inserted into the fifth grooves. The upper cover plate has a sixth groove, and an intensifying lens is attached inside the sixth groove. A second through-slot is provided above the sixth groove. The reflected light from the surface of the product to be inspected passes sequentially through the first through-slot, the beam splitter, the intensifying lens, and the second through-slot into the camera.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] The composite light source body of this invention includes a coaxial light source, a conical light source, and a control system. The coaxial light source provides uniform vertical illumination, while the conical light source surrounds it. The conical light source includes several independently controlled illumination fan-shaped areas, supplementing the light at tilted angles to effectively eliminate shadows and reflections on the surface of the object being inspected due to differences in texture or angle, thus improving image clarity and contrast. Specifically, the coaxial light source provides uniform illumination to a planar area for detecting defects such as scratches; the conical light source provides lateral illumination from multiple angles, enhancing the contrast of concave and convex surface edges. The control system coordinates the switching of the coaxial and conical light sources and the brightness of each illumination fan-shaped area, making it suitable for workpiece surfaces with different curvatures and reflectivities. It achieves full-coverage, interference-free illumination of workpiece edges and planes, effectively solving problems such as low contrast, incomplete spot coverage, and missed defects when using a single light source to inspect complex curved surfaces, significantly improving the accuracy and reliability of machine vision inspection. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a schematic diagram of the structure of a composite light source with coaxial and conical surface partition control provided by this utility model;

[0022] Figure 2 This is a cross-sectional front view of a composite light source with coaxial and conical surface partition control provided by this utility model;

[0023] Figure 3 This is a cross-sectional structural diagram of a composite light source with coaxial and conical surface partition control provided by this utility model;

[0024] Figure 4 This is a schematic diagram of the lighting sector area provided by this utility model;

[0025] Figure 5 This is a cross-sectional front view of the conical light source provided by this utility model;

[0026] Figure 6 This is a front structural diagram of the cone-shaped light source provided by this utility model;

[0027] Figure 7 This is a schematic diagram of the bottom structure of the cone-shaped light source provided by this utility model;

[0028] Figure 8 This is an exploded view of the cone-shaped light source provided by this utility model;

[0029] Figure 9 This is a schematic diagram of the upper structure of the coaxial light source provided by this utility model;

[0030] Figure 10 This is a schematic diagram of the bottom structure of the coaxial light source provided by this utility model;

[0031] Figure 11 This is a schematic diagram of the structure of the first light source assembly provided by this utility model;

[0032] Figure 12 This is a schematic diagram of the end section of the coaxial light source provided by this utility model.

[0033] The diagram includes:

[0034] 1. Composite light source body; 2. Coaxial light source; 3. Conical light source; 21. First light source assembly; 23. First ray; 22. Beam splitter; 31. Illumination sector; 33. Second ray; 10. Product to be tested; 9. Camera; 4. L-shaped connector; 24. Housing; 34. First annular base plate; 35. Second annular base plate; 36. First PCB board; 37. First LED bead; 38. Connecting plate; 381. First vertical part; 382. Second vertical part; 383. First inclined surface; 39. Diffuser plate; 391. Second inclined surface; 392. Connecting horizontal surface; 341. First receiving groove; 342. Second receiving groove; 58 57. First power cord; 56. First groove; 25. Fresnel lens; 241. Mounting groove; 211. Lamp holder; 212. Mounting base; 213. Second PCB board; 214. Second power cord; 215. Second LED bead; 216. Longitudinal groove; 217. Adjusting bolt; 242. Rear end plate; 243. Lower base plate; 244. Top cover plate; 245. Left side plate; 246. Right side plate; 247. Front end plate; 2431. First through groove; 2432. Third groove; 2471. Fourth groove; 2451. Fifth groove; 2441. Sixth groove; 26. Intensifying lens; 2442. Second through groove. Detailed Implementation

[0035] 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.

[0036] Please refer to Figures 1 to 12 This invention provides a composite light source with coaxial and conical partition control.

[0037] like Figure 1 As shown, the composite light source body 1 includes a coaxial light source 2 mounted on the upper part and a conical light source 3 mounted on the lower part; the coaxial light source 2 and the conical light source 3 are connected by an L-shaped connector 4. The coaxial light source 2 is provided with a housing 24 on the outside, and the upper part of the conical light source 3 is provided with a first annular base plate 34. One side of the L-shaped connector 4 is connected to the housing 24, and the lower part is connected to the first annular base plate 34, thereby realizing the stable assembly of the coaxial light source 2 and the conical light source 3. Furthermore, in this embodiment, three L-shaped connectors 4 are provided, which are connected and fixed by connecting bolts and are evenly distributed on the side of the housing 24 to ensure the balance and stability of the overall structure.

[0038] like Figure 3 As shown, the coaxial light source 2 includes a first light source assembly 21 disposed on one side, a Fresnel lens 25 disposed in the middle, and a beam splitter 22 disposed on the other side. The first light source assembly 21, the Fresnel lens 25, and the beam splitter 22 are arranged horizontally and sequentially inside the housing 24.

[0039] The first light source assembly 21 emits a first light ray 23 horizontally. The first light ray 23 passes through the Fresnel lens 25 to reach the beam splitter 22, and is emitted downward through the tilted beam splitter 22. The first light ray 23 passes downward through the conical light source 3 and illuminates the surface of the product 10 to be tested.

[0040] like Figure 4 As shown, the conical light source 3 includes six independently controllable illumination sector areas 31. Each illumination sector area 31 is equipped with an independent first power line 58. Each illumination sector area 31 can be independently powered and controlled through the first power line 58, achieving precise control of light at different angles and meeting the detection needs of complex surface features. When there are depressions or protrusions on the surface of the product 10 to be inspected, the local contrast is enhanced and the imaging quality is improved by activating specific sector combinations. At the same time, the arc-shaped light-emitting surface of each illumination sector area 31 is designed to be inclined at an angle to the surface of the product 10 to be inspected, and is distributed around it at an angle of 30°-45°, effectively avoiding specular reflection interference caused by perpendicular light incidence, further improving the clarity and stability of the detection image. This tilt angle design, combined with the independent control function of the zones, allows for flexible switching of the light source mode at different detection angles, adapting to the detection needs of workpieces with various materials and surface morphologies.

[0041] like Figure 2As shown, the illumination sector 31 is an inclined conical surface. The illumination sector 31 emits a second light ray 33 at an angle. The second light ray 33 surrounds the outside of the coaxial light source 2 and obliquely illuminates the surface of the product 10 to be inspected. The first light ray 23 and the second light ray 33 form a composite illumination mode, realizing the synergistic effect of coaxial and oblique light, effectively highlighting the fine structure and texture differences on the surface of the product 10 to be inspected.

[0042] Furthermore, the first light 23 and the second light 33 are reflected by the product to be tested 10 and captured by the camera 9 located on the coaxial light source 2.

[0043] like Figure 5 As shown, the upper part of the conical light source 3 includes a first annular base plate 34 installed at the top and a second annular base plate 35 installed at the bottom. The two are connected by a connecting plate 38 to form a whole. The lighting sector area 31 is located between the first annular base plate 34 and the second annular base plate 35, installed on one side of the connecting plate 38, and fixed to the connecting plate 38 with screws to ensure structural stability.

[0044] Specifically, the lighting sector area 31 includes a first PCB board 36 and a plurality of first LED beads 37 mounted on the first PCB board 36. The first PCB board 36 is inclined, and the first LED beads 37 emit second light 33 at an inclined angle. The plurality of first PCB boards 36 are connected together to form a cone.

[0045] like Figure 6 and Figure 7 As shown, the upper end of the connecting plate 38 is connected to the first annular base plate 34, and the lower end is connected to the second annular base plate 35. Specifically, the upper end of the connecting plate 38 is provided with a first vertical part 381, which is connected to the side of the first annular base plate 34. The lower end of the connecting plate 38 is provided with a second vertical part 382, ​​which is connected to the side of the second annular base plate 35. The middle part of the connecting plate 38 is provided with a first inclined slope 383, and the first PCB board 36 is inclinedly disposed on one side of the first inclined slope 383.

[0046] Furthermore, the first inclined surface 383 is connected to the first PCB board 36 by screws, so as to achieve stable installation and precise angle positioning of the first PCB board 36, and ensure that the second light 33 always illuminates the surface of the product 10 to be tested at a predetermined angle, avoiding light path deviation due to vibration or temperature change.

[0047] Furthermore, to make the second light beam 33 more uniform and stable, a diffuser plate 39 is provided on the outer side of the first LED bead 37. The light emitted by the first LED bead 37 at an angle is obliquely emitted through the diffuser plate 39. One end of the diffuser plate 39 is inserted into the first annular base plate 34, and the other end is fixedly connected to the second annular base plate 35. Specifically, the diffuser plate 39 includes a second inclined surface 391 and a lower connecting horizontal surface 392. The bottom of the first annular base plate 34 is provided with a first receiving groove 341. The second inclined surface 391 is inserted into the first receiving groove 341. The connecting horizontal surface 392 is bolted to the upper second annular base plate 35.

[0048] In order to fix the first PCB board 36, the bottom of the first annular base plate 34 is also provided with a second receiving groove 342. The first PCB board 36 is inserted into the second receiving groove 342 and fixedly connected to the first inclined surface 383 by connecting bolts.

[0049] In this embodiment, the conical light source 3 includes six first power lines 58, which are evenly distributed around the periphery of the first annular base plate 34 and are independently controlled by the control system to achieve zoned lighting regulation, thereby improving illumination uniformity and energy efficiency. Each first power line 58 is connected to a set of first PCB boards 36, and the start / stop or dimming of LED beads in each area is independently controlled to adapt to the light intensity and angle requirements of different detection stations, avoiding mutual interference.

[0050] In order to install the first power line 58, the first vertical part 381 is provided with a first groove 57, and the first annular base plate 34 is provided with a second groove 56. The first groove 57 and the second groove 56 correspond to each other. The first power line 58 passes through the first groove 57 and the second groove 56 in sequence and is electrically connected to the first PCB board 36 to provide power to the first LED bead 37 and drive the first LED bead 37 to tilt and emit the second light 33.

[0051] The coaxial light source 2 is a cuboid, and the first light source assembly 21, Fresnel lens 25 and beam splitter 22 are arranged horizontally in sequence inside the cuboid shell 24.

[0052] Furthermore, the cuboid housing 24 includes a rear end plate 242, a lower bottom plate 243, an upper cover plate 244, a left side plate 245, a right side plate 246, and a front end plate 247; the rear end plate 242 is provided with a mounting groove 241, and the first light source assembly 21 is installed inside the mounting groove 241 and connected to the housing 24.

[0053] Furthermore, the first light source assembly 21 includes a lamp holder 211 connected to the mounting groove 241 and a mounting base 212 installed inside the lamp holder 211; the lamp holder 211 is fixedly connected to the side wall of the mounting groove 241 by bolts to ensure that the first light source assembly 21 is stably installed; the mounting base 212 is embedded in the lamp holder 211, one end of the mounting base 212 is equipped with a second PCB board 213, and the other end is equipped with a second power line 214; a second LED bead 215 is installed on the second PCB board 213, and the second power line 214 passes through the mounting base 212 and is electrically connected to the second PCB board 213 to drive the second LED bead 215 to emit a first light 23.

[0054] In the previous installation embodiment, the mounting base 212 could be fixed inside the lamp holder 211, and its position was fixed; in this embodiment, as... Figure 3 As shown, the mounting base 212 moves longitudinally back and forth inside the lamp holder 211 to adjust the distance between the second LED bead 215 and the Fresnel lens 25, thereby precisely controlling the focusing position and spot size of the first light beam 23 to adapt to the depth of field requirements of different detection objects.

[0055] like Figure 9 As shown, the mounting base 212 is provided with a longitudinal groove 216, and the lamp holder 211 is equipped with an adjusting bolt 217. The end of the adjusting bolt 217 is inserted into the longitudinal groove 216. When the adjusting bolt 217 is loosened, the mounting base 212 can slide longitudinally along the longitudinal groove 216 inside the lamp holder 211 to achieve fine-tuning of the position. After adjusting to the appropriate position, the adjusting bolt 217 is tightened so that its bottom is in close contact with the bottom surface of the longitudinal groove 216, thereby locking the position of the mounting base 212 and fixing the mounting base 212 and the lamp holder 211 together, ensuring that the second LED bead 215 is stable after adjustment.

[0056] The housing 24 includes a rear end plate 242, a lower bottom plate 243, an upper cover plate 244, a left side plate 245, a right side plate 246, and a front end plate 247. A lamp holder 211 is mounted on the rear end plate 242. The lower bottom plate 243 and the upper cover plate 244 are mounted on the upper and lower sides of the rear end plate 242. The left side plate 245 and the right side plate 246 are respectively fixed to the left and right ends of the rear end plate 242. The front end plate 247 is installed at the front end of the left side plate 245, the right side plate 246, the upper cover plate 244, and the lower bottom plate 243, which together form a sealed cavity to accommodate and protect the internal first light source assembly 21, Fresnel lens 25, and beam splitter 22. The plates are fastened together by sealing strips and screws to improve the stability and dustproof and waterproof performance of the overall structure.

[0057] Furthermore, the lower base plate 243 is provided with a first through groove 2431 through which the first light 23 passes. The first through groove 2431 is located at the lower part of the beam splitter 22, so that the first light 23 is reflected by the beam splitter 22 and then projected onto the external detection area through the first through groove 2431 of the lower base plate 243.

[0058] like Figure 12 As shown, the lower base plate 243 is provided with a third groove 2432. The lower part of the Fresnel lens 25 is inserted into the third groove 2432. The third groove 2432 positions the Fresnel lens 25, ensuring its stability during vibration or movement and preventing optical axis deviation. The groove wall of the third groove 2432 fits tightly with the lower part of the Fresnel lens 25, and is fixed together with adhesive, improving the overall assembly accuracy of the optical components.

[0059] like Figure 12 As shown, the lower part of the front end plate 247 is provided with a fourth groove 2471. The lower part of the beam splitter 22 is inserted into the fourth groove 2471, and the upper part is placed against the upper part of the Fresnel lens 25. This achieves the tilted installation and positioning of the beam splitter 22, ensuring that its reflective surface forms a precise angle with the light path emitted by the first light source assembly 21, generally set at a 45-degree angle, so as to ensure that the first light ray 23 is reflected by the beam splitter 22 and projected vertically downwards, while allowing the second light ray 26 emitted by the second LED bead 215 to pass through the beam splitter 22 in a straight line, thereby achieving spatial separation and collimation alignment of the two light paths.

[0060] Furthermore, in order to fix the position of the beam splitter 22, both the left side plate 245 and the right side plate 246 are provided with inclined fifth grooves 2451, and both sides of the beam splitter 22 are inserted into the fifth grooves 2451; the fifth grooves 2451 limit the two sides of the beam splitter 22, further preventing it from tilting or shifting during use, and ensuring the long-term stability of the optical path system.

[0061] like Figure 12 As shown, the upper cover plate 244 is provided with a sixth groove 2441. An intensifying lens 26 is attached inside the sixth groove 2441. The intensifying lens 26 is tightly attached to the inner wall of the sixth groove 2441 and is fixed and sealed by optical adhesive. The intensifying lens 26 effectively reduces the interface reflection loss when the first light 23 is emitted upward, improves the light energy utilization rate, and at the same time blocks external stray light from entering the cavity, ensuring the purity of the detection signal.

[0062] To output the reflected light into the camera 9, a second through slot 2442 is provided on the upper part of the sixth groove 2441. The reflected light from the surface of the product 10 to be tested passes sequentially through the first through slot 2431, the beam splitter 22, the intensifying lens 26, and the second through slot 2442 into the camera 9, completing the acquisition of optical signals and imaging. The position of the second through slot 2442 is strictly aligned with the reflected light path of the first through slot 2431 and the beam splitter 22 to ensure unobstructed transmission of the reflected light.

[0063] In this embodiment, the control system has three operating modes:

[0064] Firstly: Surface-first mode (only activates cone light source 3);

[0065] Secondly: Plane priority mode (only coaxial light source 2 is activated);

[0066] Thirdly: Hybrid mode (synchronous triggering of coaxial light source 2 and conical light source 3).

[0067] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0068] First, full-coverage lighting: It combines the advantages of parallel coaxial light source 2 (good at planar surfaces) and conical light source 3 (good at curved edges) to achieve blind-angle lighting for complex workpiece surfaces;

[0069] Secondly, high-contrast imaging: Through independent control of the illumination sector 31, illumination can be selectively enhanced for different curvature areas of the workpiece, significantly improving the imaging contrast of defects such as pits, protrusions, and flash. Compared to ordinary single light sources, the defect detection contrast is expected to be improved by 30%-50%. Careful optical path design and independent zone control avoid stray light and overexposure, resulting in a clean and uniform image. Compared to ordinary ring light, it effectively eliminates >90% of harmful light spots.

[0070] Furthermore, the control system can dynamically adjust the lighting strategy according to a preset program or feedback signal, making one lamp multi-functional and adapting to the detection needs of various types of workpieces, increasing the detection coverage from 70-80% in the traditional method to over 98%.

[0071] Finally, it improves detection efficiency: a single photograph can acquire high-quality images sufficient for analyzing multiple defects, reducing the need for repeated lighting and multiple photographs, thus improving detection efficiency.

[0072] 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 composite light source with coaxial and conical zone control, characterized in that: The system includes a composite light source body (1), which includes a coaxial light source (2) mounted on the upper part and a conical light source (3) mounted on the lower part. The coaxial light source (2) includes a first light source assembly (21) mounted on one side, which emits a first light beam (23) horizontally. The first light beam (23) is emitted downward through an inclined beam splitter (22) and passes downward through the conical light source (3) to illuminate the surface of the product to be tested (10). The conical light source (3) includes several independently controlled illumination fan-shaped areas (31), which are inclined conical surfaces. The illumination fan-shaped areas (31) emit a second light beam (33) at an incline, which illuminates the surface of the product to be tested (10) at an incline. The first light beam (23) and the second light beam (33) are reflected by the product to be tested (10) and captured by a camera (9) mounted on the upper part of the coaxial light source (2).

2. The composite light source with coaxial and conical surface partition control according to claim 1, characterized in that: The coaxial light source (2) and the conical light source (3) are connected by an L-shaped connector (4). The coaxial light source (2) also includes a housing (24) installed on the outside. The conical light source (3) also includes a first annular base plate (34). One side of the L-shaped connector (4) is connected to the housing (24), and the lower part is connected to the first annular base plate (34).

3. The composite light source with coaxial and conical surface partition control according to claim 2, characterized in that: The conical light source (3) also includes a second annular base plate (35) installed at the lower part of the first annular base plate (34). The lighting sector (31) is located between the first annular base plate (34) and the second annular base plate (35). The lighting sector (31) includes a first PCB board (36) and a plurality of first LED beads (37) installed on the first PCB board (36). The first PCB board (36) is inclined, and the first LED beads (37) emit second light (33) at an inclined angle.

4. The composite light source with coaxial and conical surface partition control according to claim 3, characterized in that: The conical light source (3) further includes a connecting plate (38) disposed between the first annular base plate (34) and the second annular base plate (35). The upper end of the connecting plate (38) is connected to the first annular base plate (34), and the lower end is connected to the second annular base plate (35). The upper end of the connecting plate (38) is provided with a first vertical part (381), which is connected to the side of the first annular base plate (34). The lower end of the connecting plate (38) is provided with a second vertical part (382), which is connected to the side of the second annular base plate (35). The middle part of the connecting plate (38) is provided with a first inclined slope (383), and the first PCB board (36) is inclinedly disposed on one side of the first inclined slope (383).

5. A composite light source with coaxial and conical surface partition control according to claim 4, characterized in that: The conical light source (3) also includes a diffuser plate (39) disposed on one side of the first PCB board (36). One end of the diffuser plate (39) is inserted into the first annular base plate (34), and the other end is connected to the second annular base plate (35). The light emitted by the first LED lamp bead (37) is obliquely emitted through the diffuser plate (39). The diffuser plate (39) includes a second inclined surface (391) and a lower connecting horizontal surface (392). The bottom of the first annular base plate (34) is provided with a first receiving groove (341). The second inclined surface (391) is inserted into the first receiving groove (341). The connecting horizontal surface (392) is bolted to the upper second annular base plate (35). The bottom of the first annular base plate (34) is also provided with a second receiving groove (342). The first PCB board (36) is inserted into the second receiving groove (342) and fixedly connected to the first inclined surface (383) by connecting bolts.

6. A composite light source with coaxial and conical surface partition control according to claim 5, characterized in that: The conical light source (3) also includes several first power lines (58). The first vertical part (381) is provided with a first groove (57), and the first annular base plate (34) 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 (36) to provide power to the first LED lamp bead (37) and drive the first LED lamp bead (37) to tilt and emit a second light (33).

7. A composite light source with coaxial and conical surface partition control according to claim 2, characterized in that: The coaxial light source (2) also includes a Fresnel lens (25) installed between the first light source assembly (21) and the beam splitter (22). The first light ray (23) passes through the Fresnel lens (25) to reach the beam splitter (22). The first light source assembly (21), the Fresnel lens (25) and the beam splitter (22) are arranged horizontally inside the housing (24).

8. A composite light source with coaxial and conical surface partition control according to claim 7, characterized in that: The housing (24) has a mounting groove (241) at one end. The first light source assembly (21) is installed inside the mounting groove (241) and connected to the housing (24). The first light source assembly (21) includes a lamp holder (211) connected to the mounting groove (241) and a mounting base (212) installed inside the lamp holder (211). A second PCB board (213) is installed at one end of the mounting base (212), and a second power line (214) is installed at the other end. A second LED bead (215) is installed on the second PCB board (213). The second power line (214) passes through the mounting base (212) and is electrically connected to the second PCB board (213) to drive the second LED bead (215) to emit a first light (23).

9. A composite light source with coaxial and conical surface partition control according to claim 8, characterized in that: The mounting base (212) moves longitudinally back and forth inside the lamp holder (211) to adjust the distance between the second LED bead (215) and the Fresnel lens (25); the mounting base (212) is provided with a longitudinal groove (216), and the lamp holder (211) is provided with an adjusting bolt (217). The end of the adjusting bolt (217) is inserted into the longitudinal groove (216). When the adjusting bolt (217) is loosened, the mounting base (212) moves longitudinally back and forth along the longitudinal groove (216); when the adjusting bolt (217) is tightened, the mounting base (212) and the lamp holder (211) are fixed together.

10. A composite light source with coaxial and conical surface partition control according to claim 8, characterized in that: The housing (24) includes a rear end plate (242) connected to the lamp holder (211), a lower bottom plate (243) mounted on the lower part of the rear end plate (242), an upper cover plate (244) mounted on the upper part of the rear end plate (242), a left side plate (245) mounted on one side of the lower bottom plate (243), a right side plate (246) mounted on the other side of the lower bottom plate (243), and a front end plate (247) mounted on one end of the lower bottom plate (243). The lower bottom plate (243) is provided with a first through groove (2431) through which the first light ray (23) passes, and a third groove (2432) is provided on the lower bottom plate (243). The lower part of the Fresnel lens (25) is inserted into the third groove (2432), and a fourth groove (2471) is provided at the lower part of the front end plate (247). The lower part of the beam splitter (22) is inserted into the fourth groove (2471), and the upper part is placed against the upper part of the Fresnel lens (25). The left side plate (245) and the right side plate (246) are both provided with an inclined fifth groove (2451). The beam splitter (22) is inserted into the fifth groove (2451) on both sides. The upper cover plate (244) is provided with a sixth groove (2441). The sixth groove (2441) is attached with an intensifying lens (26). The upper part of the sixth groove (2441) is provided with a second through groove (2442). The reflected light from the surface of the product to be tested (10) passes through the first through groove (2431), the beam splitter (22), the intensifying lens (26) and the second through groove (2442) in sequence and enters the camera (9).

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