Light source uniformity control device based on machine vision detection

Abstract

The invention discloses a light source uniformity control device based on machine vision detection. The device comprises a mounting plate, a mounting frame arranged at the top of the mounting plate, a machine vision detector supported and mounted through the mounting frame and a light source layout structure arranged at the bottom of the mounting plate, a detection opening is formed in the middle of the mounting plate, and the bottom of the machine vision detector is located in the detection opening; the light source layout structure comprises an annular light source assembly arranged on the lower edge of the detection opening, an adjusting assembly arranged below the mounting plate and located on the periphery of the annular light source assembly, a plurality of mounting frames distributed at the bottom of the adjusting assembly and area light source assemblies arranged in the mounting frames. The device has the advantages that the light source uniformity in machine vision detection is improved, the accuracy and reliability of a detection result are further improved, illumination light in a large angle range can be provided, adaptive adjustment can be better carried out according to different requirements of objects to be detected, and wide light source application scenes can be met.

Description

Technical Field

[0001] The invention relates to a light source uniformity control device based on machine vision detection, belonging to the technical field of machine vision detection. Background Art

[0002] Machine vision is the use of machines instead of human eyes to make measurements and judgments. The machine vision system converts the captured target into image signals through machine vision products, transmits them to a dedicated image processing system, obtains the morphological information of the captured target, and converts it into digital signals based on pixel distribution, brightness, color and other information; the image system performs various operations on these signals to extract the characteristics of the target, and then controls the operation of the equipment on site based on the judgment results.

[0003] In machine vision inspection, the uniformity of the light source has a crucial impact on the accuracy and reliability of the inspection results. However, existing machine vision inspection light source devices often have problems with uneven lighting, large limitations on the illumination area, poor adjustability, and insufficient light source angles to meet the needs of diverse lighting environments. Some application scenarios are not applicable, affecting the inspection effect and accuracy. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a light source uniformity control device based on machine vision detection that can provide illumination light in a larger angle range and can be adaptively adjusted according to the different requirements of the object to be tested to meet a wider range of light source application scenarios, thereby improving the light source uniformity in machine vision detection and thus improving the accuracy and reliability of the detection results.

[0005] In order to solve the above technical problems, the light source uniformity control device based on machine vision detection of the present invention includes a mounting plate, a mounting frame arranged on the top of the mounting plate, a machine vision detector supported and installed by the mounting frame, and a light source layout structure arranged at the bottom of the mounting plate. A detection port is opened in the middle of the mounting plate, and the bottom of the machine vision detector is located in the detection port. The light source layout structure includes an annular light source assembly arranged at the lower edge of the detection port, an adjustment assembly arranged below the mounting plate and located at the periphery of the annular light source assembly, a plurality of mounting frames distributed at the bottom of the adjustment assembly, and a surface light source assembly arranged inside the mounting frame.

[0006] The surface light source assembly comprises a fixing frame installed in the installation frame, a light emitting member arranged in the fixing frame, a rotating shaft arranged at one end of the fixing frame, and a rotating member arranged at the other end of the fixing frame and extending to the outside of the installation frame.

[0007] The light-emitting element comprises a metal back plate with heat dissipation fins, an LED array flat panel lamp installed in cooperation with the metal back plate, and a distribution unit rotatably connected to a fixing frame and used in cooperation with the LED array flat panel lamp.

[0008] The distribution unit includes a connecting plate rotatably installed in the inner cavity of a fixed frame, a diffuse reflection plate connected to the connecting plate, and a diffusion film arranged on the diffuse reflection plate. A driven gear is installed on the shaft. A main shaft arranged parallel to the shaft is also arranged in the inner cavity of the fixed frame. A driving gear meshing with the driven gear is installed on the main shaft.

[0009] The rotating part includes a rotating sleeve fixedly installed on the mounting frame, a positioning sleeve arranged on the rotating sleeve for fixedly installing with the mounting frame, a locking screw screwed on the rotating sleeve, an extrusion block connected to the locking screw and located in the rotating sleeve, two locking blocks installed in the rotating sleeve through a fixing rod, and a plurality of locking cavities arranged in the positioning sleeve, a reset spring sleeved on the fixing rod is pressed between the two locking blocks, and the two locking blocks can be pressed into the locking cavity under the action of the reset spring.

[0010] The locking block is provided with a groove located at one side of the extrusion block, and the locking block is provided with a protrusion matched with the groove.

[0011] The locking cavities are evenly distributed in the rotating sleeve, and the rotating sleeve is provided with through holes adapted to the respective locking cavities.

[0012] The adjustment assembly includes a protective shell fixedly mounted on the bottom surface of the mounting plate, a limiting track arranged in the protective shell, a rotating ring mounted on the limiting track, a plurality of teeth arranged on the rotating ring, and a locking piece arranged in the protective shell and cooperating with the teeth.

[0013] The locking member includes a positioning plate fixedly mounted on the inner wall of the protective shell, a positioning rod mounted on the positioning plate, a locking plate mounted on the positioning rod, and an elastic plate mounted on the positioning plate. The end of the locking plate can be located between two adjacent teeth, and the end of the elastic plate contacts the locking plate.

[0014] The bottom of the rotating ring is fixedly connected with a connecting rod, and the bottom of the connecting rod extends to the bottom of the protective shell and is connected to the surface light source assembly.

[0015] The advantages of the present invention are: By setting the light source layout structure, a multi-light source module is formed by an annular light source component and a surface light source component. The annular light source component can provide basic lighting, while multiple surface light source components can provide supplementary lighting from different angles. The light emitted by the surface light source component can be dispersed after diffuse reflection processing, so that the light is evenly irradiated on the detection area, thereby improving the uniformity of the light source in machine vision detection, and then improving the accuracy and reliability of the detection results. By adjusting the components and setting the surface light source component to be angle-adjustable, it is possible to provide lighting light with a larger angle range, which can be better adaptively adjusted according to the different requirements of the object to be tested to meet a wider range of light source application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the light source uniformity control device based on machine vision detection of the present invention; Figure 2 It is a schematic diagram of the connection state of the mounting plate and the light source layout structure in the present invention; Figure 3 It is a structural schematic diagram of the surface light source assembly structure in the present invention; Figure 4 It is a schematic diagram of the connection state between the distribution unit and the fixed frame in the present invention; Figure 5 It is a schematic diagram of the connection state between the adjustment component and the installation frame in the present invention; Figure 6 It is a schematic diagram of the coordinated use of the locking member and the rotating ring in the present invention; Figure 7 It is a cross-sectional schematic diagram of the rotating part in the present invention.

[0017] Figure numerals: 1, mounting plate; 2, machine vision detector; 3, mounting frame; 4, light source layout structure; 5, ring light source assembly; 6, adjustment assembly; 61, protective shell; 62, limit track; 63, swivel; 64, teeth; 65, locking piece; 651, positioning plate; 652, positioning rod; 653, locking plate; 654, elastic plate; 7, mounting frame; 8, surface light source assembly; 81, fixing frame; 82, light-emitting piece; 821, metal back plate; 822, heat sink fins ;823, LED array flat panel light;824, distribution unit;8241, connecting plate;8242, diffusion film;8243, diffuse reflection plate;8244, shaft;8245, driven gear;8246, driving gear;8247, main shaft;83, rotating shaft;84, rotating part;841, rotating sleeve;842, positioning sleeve;843, locking screw;844, extrusion block;845, fixing rod;846, locking block;847, reset spring;9, connecting rod. DETAILED DESCRIPTION

[0018] The light source uniformity control device based on machine vision detection of the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] refer to Figure 1-7 The light source uniformity control device based on machine vision detection of the present invention comprises a mounting plate 1, a machine vision detector 2, a mounting frame 3 and a light source layout structure 4, wherein the mounting frame 3 is bolted to the top of the mounting plate 1, the mounting frame 3 has a support space, the machine vision detector 2 is bolted to the mounting frame 3 and is located in the support space, a detection port is opened in the middle of the mounting plate 1, and the bottom of the machine vision detector 2 is located in the detection port, and the light source layout structure 4 is arranged at the bottom of the mounting plate 1 and is used in conjunction with the machine vision detector 2; The light source layout structure 4 includes an annular light source assembly 5. The strip light source assembly 5 is arranged at the bottom of the mounting plate 1 and is located at the lower edge of the detection port. An adjustment assembly 6 is arranged at the bottom of the mounting plate 1 and is located at the periphery of the annular light source assembly 5. A plurality of mounting frames 7 are arranged in a ring shape at the bottom of the adjustment assembly 6. A surface light source assembly 8 is arranged inside the mounting frame 7. By setting the light source layout structure 4, a multi-light source module is formed by the annular light source assembly 5 and the surface light source assembly 8. Basic lighting can be provided by the annular light source assembly 5, and a plurality of surface light source assemblies 8 are provided to supplement lighting from different angles. The light emitted by the surface light source assembly 8 can be dispersed after diffuse reflection processing, so that the light is evenly irradiated on the detection area, thereby improving the uniformity of the light source in machine vision detection, and then improving the accuracy and reliability of the detection results. By adjusting the assembly 6 and setting the surface light source assembly 8 to be angle-adjustable, it is possible to provide lighting light in a larger angle range, and can be better adaptively adjusted according to the different requirements of the object to be tested to meet a wider range of light source application scenarios.

[0020] like Figure 3 As shown, the surface light source assembly 8 includes a fixed frame 81, which is located inside the mounting frame 7, and a light-emitting member 82 is arranged inside the fixed frame 81, a rotating shaft 83 is arranged at one end of the fixed frame 81, and the rotating shaft 83 is connected to the mounting frame 7 on the side close to the inner wall thereof, and a rotating member 84 is connected to the other end of the fixed frame 81, and the rotating member 84 extends to the outside of the mounting frame 7 on the side close to the inner wall of the mounting frame 7. By setting the surface light source assembly 8, the use position of the light-emitting member 82 in the mounting frame 7 is limited by the rotating member 84 and the rotating shaft 83, and the light-emitting member 82 can be made angle-adjustable by the rotating member 84, so that the surface light source assembly 8 can be adaptively adjusted according to the different requirements of the object to be tested to meet a wider range of light source application scenarios, and the light-emitting member 82 adopts a large-area, uniformly emitting flat panel lamp or light-emitting panel as the main lighting source, which can ensure uniform illumination in a larger detection area.

[0021] The light-emitting component 82 includes a metal back plate 821, and a heat dissipation fin 822 is welded on one side of the metal back plate 821, and an LED array flat panel light 823 is arranged on the other side of the metal back plate 821. The fixed frame 81 is rotatably connected to a distribution unit 824, and the distribution unit 824 is used in conjunction with the LED array flat panel light 823. By setting the light-emitting component 82, a larger illumination area can be provided by the LED array flat panel light 823, and uniform light emission can be ensured. By using the metal back plate 821 and the heat dissipation fin 822 in conjunction, the heat generated by the LED array flat panel light 823 during operation can be dissipated. By setting the distribution unit 824, the light of the LED array flat panel light 823 can be diffused, thereby breaking up the light and making it more evenly distributed, so that the light source in machine vision inspection can be uniform.

[0022] like Figure 4 As shown, the fixed frame 81 is provided with an inner cavity, and the distribution unit 824 includes two connecting plates 8241, which are rotatably connected in the inner cavity of the fixed frame 81, and the two connecting plates 8241 are respectively provided with a diffusion film 8242 and a diffuse reflection plate 8243 on opposite sides, and the diffusion film 8242 is connected to the diffuse reflection plate 8243, and a shaft 8244 is provided on one side of the connecting plate 8241 close to the inner wall of the fixed frame 81, and a driven gear 8245 is sleeved on the surface of the shaft 8244, and a driving gear 8246 is meshedly connected on one side of the driven gear 8245, and a main shaft 8247 is passed through the interior of the driving gear 8246, and the main shaft 8247 is rotatably connected to the inner cavity of the fixed frame 81. In the cavity, by setting up a distribution unit 824, the light of the LED array flat lamp 823 can be diffused through the coordinated use of a diffusion membrane 8242 and a diffuse reflection plate 8243, so as to break up the light and make it more evenly distributed, so that the light source in the machine vision detection can be uniform, and cooperate with an external driving device to drive the main shaft 8247 to rotate, and under the meshing connection between the driving gear 8246 and the driven gear 8245, the shaft 8244 synchronously drives the connecting plate 8241 to rotate, thereby changing the use angles of the diffusion membrane 8242 and the diffuse reflection plate 8243, and can evenly reflect the light in all directions, forming a soft and uniform lighting effect.

[0023] like Figure 7As shown, the rotating member 84 includes a rotating sleeve 841, the rotating sleeve 841 is bolted to the fixed frame 81 on one side thereof, a positioning sleeve 842 is sleeved on the surface of the rotating sleeve 841, and the positioning sleeve 842 is bolted to the mounting frame 7 on one side thereof, a locking screw 843 is screwed on the rotating sleeve 841, and an extrusion block 844 located in the rotating sleeve and capable of moving in the rotating sleeve is connected to the locking screw, a fixing rod 845 is arranged inside the rotating sleeve 841, and the rotating sleeve 841 has two locking blocks installed by the fixing rod 845. The locking block 846 is mounted on the fixing rod 845 and can slide on the fixing rod 845. The cross-sectional shape of the locking block 846 is an L-shaped structure. A plurality of locking cavities are provided in the positioning sleeve 842. The side of the locking block 846 close to the positioning sleeve 842 can extend into the required locking cavity. A return spring 847 mounted on the fixing rod 845 is pressed between the two locking blocks 846, and the side of the return spring 847 close to the locking block 846 is connected to the return spring 847, so that the two locking blocks 846 can be locked in the return spring. Under the action of, it is pressed into the required locking cavity. By setting the rotating part 84, when it is necessary to adjust the irradiation angle of the surface light source assembly 8, the locking screw 843 can be used to cooperate with the thread of the rotating sleeve 841 to push the extrusion block 844 to move in the rotating sleeve 841, so that the extrusion block 844 gradually pushes the two locking blocks 846 to move on the surface of the fixed rod 845, and squeezes the reset spring 847 to make the locking block 846 move out of the locking cavity of the positioning sleeve 842, release the position lock of the rotating sleeve 841, and then through the relative rotation of the rotating sleeve 841 and the positioning sleeve 842, it can synchronously drive the surface light source assembly 8 to rotate inside the mounting frame 7, thereby realizing the adjustment of the irradiation angle of the surface light source assembly 8 to adapt it to different usage requirements. After the adjustment is completed, the locking screw 843 can be reset to separate the extrusion block 844 from the locking block 846, and the elasticity of the reset spring 847 can be used to make the locking block 846 enter the locking cavity corresponding to it in the positioning sleeve 842, so as to achieve the effect of locking the use position of the surface light source assembly 8.

[0024] In addition, the locking block 846 is provided with a groove located on one side of the extrusion block 844, and the locking block 846 is provided with a protrusion that cooperates with the groove. By setting the protrusion and the groove, the extrusion block 844 and the locking block 846 can be used in coordination with each other, so that it is convenient for the extrusion block 844 to release the locking state of the locking block 846, and the locking cavity is evenly distributed in the rotating sleeve 841, and the rotating sleeve 841 is provided with through holes corresponding to each locking cavity. By setting the through holes and the locking cavity arranged in a ring, the locking block 846 can pass through the rotating sleeve 841 and enter the interior of the positioning sleeve 842, thereby achieving the effect of locking the position of the rotating sleeve 841.

[0025] like Figure 5As shown, the adjustment component 6 includes a protective shell 61, which is fixedly mounted on the bottom surface of the mounting plate 1, and the inner wall of the protective shell 61 is bolted to a limiting track 62, and a swivel 63 is slidably sleeved on the surface of the limiting track 62, and a surface of the swivel 63 away from the limiting track 62 is provided with a plurality of teeth 64 in a ring shape, and a locking piece 65 is bolted to the right side of the inner wall of the protective shell 61, and the locking piece 65 is used in conjunction with the teeth 64. By setting the adjustment component 6, the swivel 63 can be rotated on the surface of the limiting track 62, and the mounting frame 7 can be driven to rotate synchronously, so that the use orientation of the surface light source assembly 8 can be adjusted, so that the surface light source assembly 8 has good use flexibility, and when the adjustment is completed, the locking piece 65 can be clamped between two adjacent teeth 64 to lock the position of the swivel 63, thereby achieving the effect of locking the position of the surface light source assembly 8.

[0026] like Figure 6 As shown, the locking member 65 includes a positioning plate 651, the right side of the positioning plate 651 is connected to the inner wall of the protective shell 61, and a positioning rod 652 is arranged on the top of the positioning plate 651, and a locking plate 653 is mounted on the positioning rod 652, and the other end of the locking plate 653 is between two adjacent teeth 64, and an elastic plate 654 is arranged on the top of the positioning plate 651, and the side of the elastic plate 654 close to the locking plate 653 is in close contact with it. By setting the locking member 65, the teeth 64 on the surface of the swivel 63 will push the locking plate 653 during the rotation of the swivel 63. When the force applied to the swivel 63 can overcome the elastic force of the elastic plate 654, the locking plate 653 will be lifted up by the teeth 64 and pass over the height of one tooth 64. Then, when the swivel 63 continues to rotate, the locking plate 653 will fall down under the action of the elastic force of the elastic plate 654 and be stuck between the next adjacent teeth 64, which can prevent the swivel 63 from reversing.

[0027] Furthermore, the bottom of the swivel 63 is connected to a connecting rod 9, and the bottom of the connecting rod 9 extends to the bottom of the protective shell 61 and is bolted to the surface light source assembly 8. By setting the connecting rod 9, the connection between the swivel 63 and the mounting frame 7 can be achieved, thereby facilitating the effect of synchronously driving the swivel 63 to rotate by rotating the mounting frame 7.

[0028] Here’s how it works: The annular light source assembly 5 can provide basic lighting, while the surface light source assemblies 8 arranged in multiple and different directions can provide large-area and uniform compensatory lighting, and the mounting frame 7 drives the rotating ring 63 to rotate on the limiting track 62 through the connecting rod 9, so that the force on the rotating ring 63 can overcome the elastic force of the elastic plate 654, and the locking plate 653 will be lifted up by the teeth 64 and pass over the height of one tooth 64, and then when the rotating ring 63 continues to rotate, the locking plate 653 will fall under the elastic force of the elastic plate 654 and get stuck in the next phase. The use orientation of the surface light source assembly 8 can be locked between the adjacent teeth 64, and then the use angle of the light emitting member 82 and the light diffusion angle can be adjusted according to the lighting requirements. The locking screw 843 can first be used to push the extrusion block 844 to move in the rotating sleeve 841 through the threaded cooperation between the locking screw 843 and the rotating sleeve 841, so that the extrusion block 844 gradually pushes the two locking blocks 846 to move on the surface of the fixed rod 845, and squeezes the reset spring 847 to move the locking block 846 out of the interior of the positioning sleeve 842, releasing the rotation. The position of the rotating sleeve 841 is locked, and the relative rotation of the rotating sleeve 841 and the positioning sleeve can synchronously drive the surface light source assembly 8 to rotate inside the installation frame 7, so that it can adapt to different usage requirements. After the adjustment is completed, the locking screw 843 can be reset to separate the extrusion block 844 from the locking block 846, and the elasticity of the reset spring 847 can be used to make the locking block 846 enter the corresponding groove in the positioning sleeve 842 to achieve the locking of the use position of the surface light source assembly 8, and then the main shaft 824 can be driven by an external drive device. 7 rotates, and under the meshing connection between the driving gear 8246 and the driven gear 8245, the shaft 8244 synchronously drives the connecting plate 8241 to rotate, thereby changing the use angle of the diffusion film 8242 and the diffuse reflection plate 8243. Therefore, under the coordinated use of the diffusion film 8242 and the diffuse reflection plate 8243, the light of the LED array flat panel light 823 can be diffused, thereby breaking up the light and making it more evenly distributed in the irradiated area, so that the detection result and accuracy of the machine vision detector 2 can be guaranteed.

[0029] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A light source uniformity control device based on machine vision detection, characterized in that: The invention comprises a mounting plate (1), a mounting frame (3) arranged on the top of the mounting plate (1), a machine vision detector (2) supported and installed by the mounting frame (3), and a light source layout structure (4) arranged at the bottom of the mounting plate (1); a detection port is opened in the middle of the mounting plate (1), the bottom of the machine vision detector (2) is located in the detection port, and the light source layout structure (4) comprises an annular light source assembly (5) arranged at the lower edge of the detection port, an adjustment assembly (6) arranged below the mounting plate (1) and located at the periphery of the annular light source assembly (5), a plurality of mounting frames (7) distributed at the bottom of the adjustment assembly, and a surface light source assembly (8) arranged inside the mounting frame (7).

2. The light source uniformity control device based on machine vision detection according to claim 1, characterized in that: The surface light source assembly (8) comprises a fixed frame (81) installed in the installation frame (7), a light-emitting member (82) arranged in the fixed frame (81), a rotating shaft (83) arranged at one end of the fixed frame (81), and a rotating member (84) arranged at the other end of the fixed frame (81) and extending to the outside of the installation frame (7).

3. The light source uniformity control device based on machine vision detection according to claim 2, characterized in that: The light-emitting element (82) comprises a metal back plate (821) having heat dissipation fins (822), an LED array flat panel light (823) mounted in cooperation with the metal back plate (821), and a distribution unit (824) rotatably connected to the fixing frame (81) and used in cooperation with the LED array flat panel light (823).

4. The light source uniformity control device based on machine vision detection according to claim 3, characterized in that: The distribution unit (824) comprises a connecting plate (8241) rotatably mounted in the inner cavity of a fixed frame (81) via a shaft (8244), a diffuse reflection plate (8243) connected to the connecting plate, and a diffusion film (8242) arranged on the diffuse reflection plate, a driven gear (8245) being mounted on the shaft (8244), a main shaft (8247) arranged parallel to the shaft (8244) being further arranged in the inner cavity of the fixed frame (81), and a driving gear (8246) meshing with the driven gear (8245) being mounted on the main shaft (8247).

5. The light source uniformity control device based on machine vision detection according to claim 2, 3 or 4, characterized in that: The rotating member (84) comprises a rotating sleeve (841) fixedly mounted on the mounting frame (7), a positioning sleeve (842) provided on the rotating sleeve for fixedly mounting with the mounting frame (7), a locking screw (843) screwed onto the rotating sleeve (841), an extrusion block (844) connected to the locking screw and located inside the rotating sleeve, two locking blocks (846) installed inside the rotating sleeve (841) via a fixing rod (845), and a plurality of locking cavities provided in the positioning sleeve (842), a return spring (847) sleeved on the fixing rod (845) being pressed between the two locking blocks (846), and the two locking blocks (846) can be pressed into the locking cavities under the action of the return spring.

6. The light source uniformity control device based on machine vision detection according to claim 5, characterized in that: The locking block (846) is provided with a groove located on one side of the extrusion block (844), and the locking block (846) is provided with a protrusion that cooperates with the groove.

7. The light source uniformity control device based on machine vision detection according to claim 6, characterized in that: The locking cavities are evenly distributed in a circle inside the rotating sleeve (841), and the rotating sleeve (841) is provided with through holes adapted to the respective locking cavities.

8. The light source uniformity control device based on machine vision detection according to claim 1, 2, 3, 6 or 7, characterized in that: The adjustment assembly (6) comprises a protective shell (61) fixedly mounted on the bottom surface of the mounting plate (1), a limiting track (62) arranged in the protective shell (61), a rotating ring (63) mounted on the limiting track (62), a plurality of teeth (64) arranged on the rotating ring (63), and a locking member (65) arranged in the protective shell (61) and cooperating with the teeth (64).

9. The light source uniformity control device based on machine vision detection according to claim 8, characterized in that: The locking member (65) comprises a positioning plate (651) fixedly mounted on the inner wall of the protective shell (61), a positioning rod (652) mounted on the positioning plate (651), a locking plate (653) mounted on the positioning rod (652), and an elastic plate (654) mounted on the positioning plate (651); the end of the locking plate (653) can be located between two adjacent teeth (64), and the end of the elastic plate (654) is in contact with the locking plate (653).

10. The light source uniformity control device based on machine vision detection according to claim 9, characterized in that: The bottom of the rotating ring (63) is fixedly connected to a connecting rod (9), and the bottom of the connecting rod (9) extends to the bottom of the protective shell (61) and is connected to the surface light source assembly (8).

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