A visual inspection structure based on a special-shaped net component and weakening light spots

Abstract

The utility model relates to detection field, concretely is a kind of visual inspection structure based on special-shaped netted component and weakens light spot, detection seat includes light guide column and is used for the back light source for exerting back light to light guide column, the end of light guide column is provided with the article slot for receiving material, air suction hole that is communicated with air source is opened in light guide column, air suction hole includes the axial air suction hole that is opened along light guide column axial direction, and radial air suction hole that is opened along light guide column radial direction, radial air suction hole is arranged adjacent to article slot.

Description

Technical Field

[0001] This utility model relates to the field of detection, specifically a visual detection structure based on irregularly shaped mesh components and weakened light spots. Background Technology

[0002] Irregularly shaped mesh components, as special parts with complex geometric features, are often used in special locations such as steel mesh panels in mobile phone earpieces or speaker positions. As the name suggests, irregularly shaped mesh components have three main characteristics: their complex shape makes them difficult to grasp; their mesh structure makes them difficult to fix; and because they are often loose parts, they are prone to orientation errors during material stacking, leading to grasping deviations and placement skew. With the widespread adoption of industrial automation, irregularly shaped mesh components are currently often photographed at a fixed angle from a single side using methods such as CCD cameras with telecentric lenses for vertical illumination to analyze their size, defects, and location. However, due to the aforementioned three characteristics, grasping efficiency is low, and defects may be missed or even falsely detected due to poor fixation or placement skew. This is clearly unacceptable in such high-efficiency, high-positional-accuracy, and high-stability inspection processes. Furthermore, due to the aforementioned conventional 2D inspection method, defects such as burrs, microcracks, and curled edges will inevitably be missed if they appear at a non-direct angle to the component (such as the side or back of the component). At the same time, due to the thin and light nature of irregularly shaped mesh components, slight warping and twisting of the surface are also among the inspection targets. However, it is clear that single-view inspection has limited detection capabilities for such targets, causing defective products to often enter the assembly process, resulting in poor sealing or even assembly failure, thus causing significant trouble for subsequent processes. Finally, if there are special shaped mesh holes on irregularly shaped mesh components, the lack of multi-angle comparison and backlight compensation measures under 2D view can easily lead to confusion in mesh shape recognition, such as identifying non-circular holes as circular holes.

[0003] In summary, solving the problem of difficulty in grasping irregularly shaped mesh components while simultaneously addressing the lack of backlight compensation for these components has become an industry challenge that urgently needs to be resolved. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a visual detection structure based on irregularly shaped mesh components and weakening the light spot. This utility model improves the grasping efficiency of irregularly shaped mesh components while providing backlight compensation and weakening the influence of light spots.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A visual inspection structure based on irregular mesh components and weakened light spot is disclosed. The inspection base includes a light guide column and a backlight source for applying backlight to the light guide column. The end of the light guide column is provided with a storage groove for receiving materials. An air suction hole is opened in the light guide column to connect the storage groove with an air source. The air suction hole includes an axial air suction hole opened along the axis of the light guide column and a radial air suction hole opened along the radial direction of the light guide column. The radial air suction hole is arranged adjacent to the storage groove.

[0007] As a further embodiment of this utility model: a sealing seat is coaxially provided on the outer ring of the light guide column, and the sealing seat and the light guide column are sealed by a sealing component. The sealing component, the sealing seat and the light guide column form a flow gap. An air source hole is provided on the sealing seat. The air source forms a negative pressure adsorption on the material in the storage tank through the air source hole, the flow gap and the air suction hole.

[0008] As a further improvement of this utility model: the sealing assembly includes two sets of sealing rings, which are located above and below the radial air suction hole, respectively. A sealing groove is provided on the light guide post along the circumferential direction for the sealing rings to be snapped and fixed.

[0009] As a further embodiment of this utility model: a transmission gear is coaxially fixed on the light guide column. The transmission gear is driven to rotate by a power source to drive the light guide column to rotate around its own axis. The transmission gear and the sealing seat are offset along the axial direction of the light guide column.

[0010] As a further improvement of this utility model: a bearing assembly is provided inside the sealing seat, and the bearing assembly is coaxially rotated with the light guide column.

[0011] As a further improvement of this utility model, the length of the axial air suction hole is less than one-tenth of the axial length of the light guide post.

[0012] As a further improvement of this utility model, the backlight is located at the end of the light guide column away from the storage slot.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model integrates optical light guiding and negative pressure adsorption functions by incorporating axial and radial air suction holes in the light guide column. While fixing materials in the placement slot and adsorbing them under negative pressure, the light guide column provides uniform backlight by utilizing its light transmittance, thus forming backlight compensation. Since the axial air suction hole will produce light spot effects when negative pressure adsorption is set, the length of the axial air suction hole is shortened as much as possible, and the radial air suction hole is made close to the placement slot, thereby reducing the light spot generated on the surface of the material and weakening the impact of the light spot on visual inspection. This forms an anti-light spot design under the premise of back supplementary lighting.

[0015] 2. The design of the transmission gear driving the light guide column to rotate in this utility model allows materials to be inspected from multiple angles. Combined with the axial arrangement of the backlight, it avoids local reflections caused by a fixed light source, further improving the comprehensiveness and accuracy of visual inspection.

[0016] 3. This utility model combines backlighting to illuminate and transmit light through the light guide column, achieving high light transmittance and vacuum sealing. While meeting the requirements of a high-transmittance visual environment, it can stably and accurately adsorb materials and rotate them at any angle.

[0017] 4. The sealing rings of this invention are positioned above and below the radial air suction holes, forming a flow gap with the sealing seat. This ensures both airtightness and uniform negative pressure distribution, preventing air leakage that could lead to adsorption failure. It supports high-speed rotation of the light guide column while maintaining airflow sealing, making it suitable for dynamic detection scenarios. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a cross-sectional view of the present invention.

[0020] Figure 3 This is a schematic diagram of the detection seat in this utility model.

[0021] Figure 4 This is a schematic diagram of the detection system in this utility model.

[0022] Figure 5 for Figure 4 Top view.

[0023] Figure 6 for Figure 4 A schematic diagram of the structure of the medium-range transfer platform.

[0024] In the picture:

[0025] 1. Seat; 11. Material handling area;

[0026] 111. First stacking bin; 112. First loading bin; 113. Unloading bin;

[0027] 12. Material storage and retrieval guide rail; 121. Lifting material retrieval hand; 122. Adsorption hand;

[0028] 2. Conveyor rail; 21. Variable pitch transfer platform; 211. Positioning platform; 212. Air suction head;

[0029] 22. Testing table; 221. Base; 222. Driven gear; 223. Driving gear;

[0030] 224. Rotating platform; 225. Linear slider; 226. Guide rack; 227. Detection seat;

[0031] 2271. Transmission gear; 2272. Storage slot; 2273. Light guide column;

[0032] 2274. Air suction hole; 2275. Sealing ring;

[0033] 228. Sealing seat; 2281. Air source port; 2282. Flow gap; 229. Backlight;

[0034] 3. Lifting and material handling module; 4. Vision inspection module;

[0035] 5. Flipping transfer module; 51. Flipping material handler; 52. Transfer material handler;

[0036] 6. Storage area; 611. Second stacking bin; 612. Second loading bin; 613. Storage bin;

[0037] 7. Storage robot. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figures 1-5In this embodiment of the invention, a visual inspection structure based on irregularly shaped mesh components and weakened light spots includes a conveying guide rail 2 mounted on a base 1. A flipping transfer module 5 for flipping irregularly shaped mesh components (hereinafter referred to as materials) by 180 degrees is suspended in the middle of the conveying guide rail 2. Along the conveying direction of the conveying guide rail 2, visual inspection modules 4, lifting and picking modules 3, and storage and retrieval guide rails 12 are symmetrically arranged on both sides of the flipping transfer module 5. The visual inspection modules 4, lifting and picking modules 3, and storage and retrieval guide rails 12 are arranged sequentially in the direction away from the flipping transfer module 5 and suspended above the conveying guide rail 2. The two sets of visual inspection modules 4 are respectively for front and back inspection of the materials, and the two sets of lifting and picking modules 3 and storage and retrieval guide rails 12 also correspond to the front inspection process and the back inspection process, respectively. Both sets of material storage and retrieval guide rails 12 are arranged perpendicularly to each other with the conveying guide rails 2. The difference lies in that one set of material storage and retrieval guide rails 12 is equipped with a lifting material retrieval hand 121. After the lifting material retrieval hand 121 slides along the material storage and retrieval guide rail 12, it retrieves material from the material retrieval area 11 through a vertically raised suction hand 122. The suction hand 122 is located at the working end of the lifting material retrieval hand 121, and multiple suction areas are arranged along the straight direction on the suction hand 122 to absorb material. The other set of material storage and retrieval guide rails 12 is slidably equipped with two sets of material storage robots 7, which respectively release material into the two sets of material storage areas 6. The qualified and unqualified materials on the variable pitch transfer platform 21 are transferred to the corresponding material storage areas 6.

[0040] Two sets of variable-pitch transfer platforms 21 are slidably arranged at both ends of the conveying guide rail 2. Two sets of detection tables 22 located between the two variable-pitch transfer platforms 21 are also slidably arranged on the conveying guide rail 2. The sliding trajectory of the variable-pitch transfer platform 21 is located between the lifting and picking module 3 and the end of the conveying guide rail 2. The sliding trajectory of the vision inspection module 4 is located between the lifting and picking module 3 and the flipping transfer module 5. The vision inspection module 4 is existing technology, so its structure will not be described in detail. It is usually composed of a telecentric lens, a CCD camera and a light source, and performs visual inspection from top to bottom along the vertical direction. The two sets of variable-pitch transfer platforms 21 are used in conjunction with the material storage and picking, respectively. Positioning platforms 211 are evenly spaced on the variable-pitch transfer platform 21 along the direction perpendicular to the conveying guide rail 2. Each positioning platform 211 is equipped with an air suction head 212, which is used to adsorb materials from bottom to top. Each air suction head 212 is located on the material storage and picking path of the material storage and picking guide rail 12. The air suction head 212 is arranged in a groove shape, and the shape of the groove corresponds to the shape of the material.

[0041] Along the conveying direction of the conveying guide rail 2, a material picking area 11 is provided on one side of the starting end of the conveying guide rail 2, and a storage area 6 is symmetrically provided on both sides of the ending end of the conveying guide rail 2; the two sets of storage areas 6 are used to store qualified materials and unqualified materials respectively.

[0042] The material handling area 11 includes a first stacking bin 111, a first feeding bin 112, and a material handling bin 113 arranged sequentially along the parallel conveying guide rail 2. The first stacking bin 111 contains multiple sets of empty storage trays stacked from bottom to top. A hydraulic lifting module or an elastic lifting module can be installed in the first stacking bin 111 to lift the storage trays. The material handling area 11 is equipped with a pushing device that sequentially pushes the uppermost storage tray of the first stacking bin 111 to the first feeding bin 112 and the material handling bin 113. The pushing device can be a linear power source such as an electric push rod or a cylinder. A robotic arm is installed at the first feeding bin 112 to load empty storage trays, or manual loading can be performed directly at the first feeding bin 112.

[0043] The storage area 6 includes a second stacking bin 611, a second feeding bin 612, and a storage bin 613 arranged sequentially along the parallel conveying guide rail 2. The storage area 6 is equipped with a pushing device that pushes the storage trays on the storage bin 613 sequentially to the second feeding bin 612 and the second stacking bin 611. The storage trays containing materials are stacked from top to bottom in the second stacking bin 611. The storage bins 613 of the two storage areas 6 are used to store qualified materials and unqualified materials, respectively.

[0044] After the materials in the material handling area 11 are transferred to the variable-pitch transfer platform 21 via the storage and retrieval guide rail 12, the materials are evenly spaced, corresponding to the lens arrangement spacing of the vision inspection module 4. The variable-pitch transfer platform 21 carries the materials to the area below the lifting and retrieval module 3. After the lifting and retrieval module 3 lifts and adsorbs the materials, the inspection table 22 moves to the area directly below the lifting and retrieval module 3 and receives the materials.

[0045] The testing platform 22 includes a rotating platform 224 fixed on the positioning platform 211. The rotation axis of the rotating platform 224 is arranged along the direction of the vertical conveying guide rail 2. Testing seats 227 for receiving materials are spaced apart on the rotating platform 224. The testing seats 227 rotate with the rotating platform 224 to produce a pitching motion. A linear slider 225 is slidably arranged on the rotating platform 224 along its length. The linear slider 225 is driven by a cylinder or linear motor to slide along the length of the rotating platform 224. The sliding trajectory of the linear slider 225 is parallel to the rotation axis of the rotating platform 224. A guide rack 226 is provided on the linear slider 225 along its length, and the guide rack 226 and the transmission gears 2271 on the testing seats 227 form a gear and rack transmission.

[0046] The detection seat 227 includes a light guide column 2273 that rotates and engages with the rotating platform 224, and a transmission gear 2271 coaxially arranged at the bottom of the light guide column 2273. A material placement groove 2272 is provided at the top of the light guide column 2273 for positioning materials. The material placement groove 2272 is connected to a negative pressure source through an air suction hole 2274 on the detection seat 227 to adsorb materials under negative pressure. A backlight source 229 is provided inside the rotating platform 224, which contacts the light guide column 2273. The light guide column 2273 rotates and engages with the rotating platform 224 and the sealing seat 228 via a bearing structure.

[0047] A sealing seat 228 is coaxially arranged on the outer ring of the light guide column 2273 on the rotating platform 224. The sealing seat 228 and the light guide column 2273 are sealed by at least two sets of sealing rings 2275. The two sets of sealing rings 2275, the sealing seat 228, and the light guide column 2273 form a flow gap 2282. An air suction hole 2274 is opened on the light guide column 2273, which connects the flow gap 2282 and the storage groove 2272. An air source hole 2281 is opened on the sealing seat 228, which connects the air source and the flow gap 2282. The two sets of sealing rings 2275 are located above and below the radial air suction hole, respectively. A sealing groove is opened on the light guide column 2273 along the circumferential direction for the sealing rings 2275 to be snapped and fixed.

[0048] The air suction hole 2274 includes an axial air suction hole formed along the axis of the light guide post 2273 and a radial air suction hole formed along the radial direction of the light guide post 2273. The radial air suction hole is arranged adjacent to the storage slot 2272. In order to minimize the influence of light spot caused by the light source shining on the air suction hole, the radial air suction hole is arranged as close as possible to the storage slot 2272, thereby shortening the length of the axial air suction hole as much as possible. The length of the axial air suction hole is preferably less than one-tenth of the axial length of the light guide post 2273.

[0049] Two sets of driving gears 223 and driven gears 222 are mounted on the base 221 with their axes arranged in parallel. The driving gears 223 are driven to rotate by a motor. The driven gears 222 are arranged coaxially with the rotation axis of the rotating platform 224. The driven gears 222 and the driving gears 223 are driven by gear meshing or by belt drive, thus rotating synchronously.

[0050] The flipping transfer module 5 includes a flipping pick-up hand 51 and a transfer pick-up hand 52. The flipping pick-up hand 51 is configured to flip the material on the detection table 22 by 180 degrees after adsorbing it. Since the structure of the flipping pick-up hand 51 is existing technology, it will not be described in detail. Its working section is equipped with an adsorption component similar to the air suction head 212, thereby adsorbing the material from top to bottom. The transfer pick-up hand 52 slides and engages with the frame of the flipping transfer module 5 along the arrangement direction of the conveying guide rail 2. The picking end of the transfer pick-up hand 52 is driven to rise and fall by a cylinder to adsorb the material adsorbed on the flipping pick-up hand 51 from top to bottom.

[0051] The specific steps for overall testing are as follows:

[0052] S1. The empty storage tray at the top of the first stacking bin 111 is pushed to the first feeding bin 112 by a pushing device such as a cylinder or hydraulic cylinder. After all the materials to be tested are loaded into the storage trough of the storage tray by a robotic arm or manual loading, the pushing device pushes the storage tray full of materials to the picking bin 113.

[0053] S2. The lifting and picking hand 121 on the storage and picking guide rail 12 on one side of the picking area 11 is driven by the servo motor to slide along the storage and picking guide rail 12 and move to the top of the picking bin 113. After the suction hand 122 on the lifting and picking hand 121 is vertically raised and lowered, it picks up a row of materials in the storage tray by negative pressure suction.

[0054] S3. After the material is sucked up, the suction hand 122 drives the material to rise and slides along the storage and retrieval guide rail 12 with the lifting and lifting material retrieval hand 121 to reach the top of each variable pitch transfer platform 21. The suction hand 122 places the suctioned material on the air suction head 212 of each positioning platform 211 in sequence through the lifting and lifting movement, so that the material is evenly distributed on the variable pitch transfer platform 21.

[0055] S4. The variable pitch transfer platform 21 drives the material to slide along the conveying guide rail 2 to the lifting and picking module 3. After the working end of the lifting and picking module 3 is lowered by hydraulic drive, it picks up the air suction head 212 on each positioning platform 211 by negative pressure adsorption, and then drives the material to rise. After that, the variable pitch transfer platform 21 is reset.

[0056] S5. The inspection table 22 slides along the conveyor rail 2 to the direct below the lifting and picking module 3. The material picked up by the lifting and picking module 3 is released into each of the placement slots 2272 of the inspection table 22. The inspection table 22 carries the material and slides to the direct below the vision inspection module 4.

[0057] S6. The inspection platform 22 drives the rotating platform 224 to rotate. At the same time, the inspection seat 227 on the inspection platform 22 is driven to rotate by the gear and rack. In the state of overall pitch rotation + rotation of the inspection seat 227, the vision inspection module 4 is activated to perform visual inspection on the front of the material from various angles.

[0058] S7. After the test is completed, the test table 22 is reset and moved to the flipping transfer module 5. After the flipping transfer module 5's flipping pick-up hand 51 picks up the materials on the test table 22, it drives the materials to flip 180 degrees, changing from picking up materials from top to bottom to picking up materials from bottom to top, so that the back of the materials are arranged facing up. The transfer pick-up hand 52 slides along the flipping transfer module 5 to directly above the flipping pick-up hand 51, then vertically rises and falls and picks up the materials, and transports the materials to the test table 22 on the other side of the flipping transfer module 5.

[0059] S8. The inspection station 22 on the other side carries the material to the visual inspection module 4 on the other side of the flipping transfer module 5, and repeats step S6 to visually inspect the back of the material from various angles.

[0060] S9. After the inspection is completed, the inspection table 22 carries the material to the lifting and picking module 3 on the other side of the flipping transfer module 5. After the lifting and picking module 3 lifts and picks up the material that has completed the visual inspection of the front and back sides, it will pick up the material after the lifting and picking action.

[0061] S10, the variable pitch transfer platform 21 of the adjacent storage area 6 moves to directly below the lifting and picking module 3, and receives and adsorbs the material on the lifting and picking module 3 through the air suction head 212. The variable pitch transfer platform 21 moves between the two sets of storage areas 6 as a buffer platform, and the qualified materials and unqualified materials are respectively picked up by the two sets of storage robots 7 and placed into the corresponding storage area 6. After each storage tray is full of material, it enters the second stacking bin 611 for stacking and storage.

[0062] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0063] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A visual detection structure based on irregularly shaped mesh components and weakened light spot, characterized in that, The detection seat (227) includes a light guide column (2273) and a backlight source (229) for applying backlight to the light guide column (2273). The end of the light guide column (2273) is provided with a storage groove (2272) for receiving materials. An air suction hole (2274) is opened in the light guide column (2273) to connect the storage groove (2272) with an air source. The air suction hole (2274) includes an axial air suction hole opened along the axial direction of the light guide column (2273) and a radial air suction hole opened along the radial direction of the light guide column (2273). The radial air suction hole is arranged adjacent to the storage groove (2272).

2. The visual detection structure based on irregularly shaped mesh components and weakened light spot according to claim 1, characterized in that, A sealing seat (228) is coaxially arranged on the outer ring of the light guide column (2273). The sealing seat (228) and the light guide column (2273) are sealed by a sealing assembly. The sealing assembly, the sealing seat (228), and the light guide column (2273) form a flow gap (2282). An air source hole (2281) is opened on the sealing seat (228). The air source forms a negative pressure adsorption on the material in the storage tank (2272) through the air source hole (2281), the flow gap (2282), and the air suction hole (2274).

3. The visual detection structure based on irregularly shaped mesh components and weakened light spot according to claim 2, characterized in that, The sealing assembly includes two sets of sealing rings (2275), which are located above and below the radial air suction hole, respectively. A sealing groove is provided on the light guide post (2273) along the circumferential direction for the sealing rings (2275) to be snapped and fixed.

4. A visual detection structure based on irregularly shaped mesh components and weakened light spot according to any one of claims 1 to 3, characterized in that, A transmission gear (2271) is coaxially fixed on the light guide column (2273). The transmission gear (2271) is driven to rotate by a power source to drive the light guide column (2273) to rotate around its own axis. The transmission gear (2271) and the sealing seat (228) are offset along the axial position of the light guide column (2273).

5. A visual detection structure based on irregularly shaped mesh components and weakened light spot according to any one of claims 1 to 3, characterized in that, A bearing assembly is provided inside the sealing seat (228), which is coaxially rotated with the light guide column (2273) through the bearing assembly.

6. A visual detection structure based on irregularly shaped mesh components and weakened light spot according to any one of claims 1 to 3, characterized in that, The length of the axial air suction hole is less than one-tenth of the axial length of the light guide post (2273).

7. A visual detection structure based on irregularly shaped mesh components and weakened light spot according to any one of claims 1 to 3, characterized in that, The backlight (229) is located at the end of the light guide (2273) away from the storage slot (2272).

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