Double-sided automatic visual inspection system based on special-shaped net-shaped component

Abstract

The invention relates to the field of detection, in particular to a double-sided automatic visual detection system based on a special-shaped net-shaped component, which comprises a conveying guide rail arranged on a seat body and used for conveying materials, and also comprises a front detection station, a turn-over transfer module and a back detection station which are sequentially arranged along the conveying direction of the conveying guide rail, the front surface testing station and the back surface testing station are configured to perform visual inspection on the front surface and the back surface of a material respectively, and the turn-over transfer module is configured to perform turn-over operation on the material; after the material is stably adsorbed under negative pressure, the posture of the material is fixed, the stability under repeated action is improved, multi-angle visual detection of the material is realized through pitching action of the rotating platform and autorotation of the detection seat, a backlight compensation measure is provided, and the detection precision is improved. Multi-view-angle automatic assembly line type visual detection of the materials is achieved under the multi-angle and multi-posture conditions, and the comprehensiveness and precision of visual detection of the materials are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of detection, in particular to a double-sided automatic visual detection system based on special-shaped mesh components. Background Art

[0002] Special-shaped mesh components, as specialized components with complex geometric features, are often used in specialized locations, such as steel mesh panels for mobile phone receivers or speakers. As the name suggests, special-shaped mesh components present three key characteristics: Their complex shape makes them difficult to grasp; their inherent mesh characteristics make them difficult to secure; and, because they are often distributed as loose parts, they are prone to misaligned grasping during material stacking, leading to misaligned positioning. With the increasing prevalence of industrial automation, special-shaped mesh components are currently often imaged vertically from a single side at a fixed angle using CCD cameras coupled with telecentric lenses. This allows for analysis and assessment of their dimensions, defects, position, and other characteristics. These three characteristics can lead to low grasping efficiency due to difficulty in grasping, or missed or even false detection of defects due to poor securing or misaligned positioning. These issues are clearly prohibited in inspection processes that demand high efficiency, high positioning accuracy, and high stability. In addition, due to the above-mentioned normal 2D detection method, once defects such as burrs, microcracks, and curling appear at non-direct angles of the component (such as the side or back of the component), they are bound to be missed. At the same time, due to the light and thin characteristics of special-shaped mesh components, slight warping and distortion on the surface are also one of the detection targets, but it is obvious that single-view detection has limited detection capabilities for such targets, resulting in defective products often flowing into the assembly process, resulting in poor sealing or even inability to assemble, which causes great trouble to subsequent processes. Finally, once there is a special-shaped mesh on the special-shaped mesh component, the 2D perspective does not have multi-angle comparison and no backlight compensation measures, which easily leads to mesh shape recognition confusion problems, such as identifying non-circular holes as circular holes, which needs to be solved urgently. Summary of the Invention

[0003] To avoid and overcome the technical problems existing in the prior art, the present invention provides a double-sided automated visual inspection system based on a special-shaped mesh component. After the material is stably adsorbed by negative pressure, the material's posture is fixed, improving stability under repetitive movements. Through the pitching motion of the rotating platform and the rotation of the inspection base, multi-angle visual inspection of the material is achieved. Backlight compensation is also provided, enabling multi-viewing, automated, streamlined visual inspection of the material at multiple angles and postures, significantly improving the comprehensiveness and accuracy of material visual inspection.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A double-sided automated visual inspection system based on a special-shaped mesh component includes a conveyor rail disposed on a base body for conveying materials, and also includes a front inspection station, a flip transfer module, and a back inspection station arranged in sequence along the conveying direction of the conveyor rail; the front inspection station and the back inspection station are configured to perform visual inspections on the front and back of the materials, respectively, and the flip transfer module is configured to flip the materials;

[0006] Both the front inspection station and the back inspection station are equipped with an inspection platform that slides with the conveying guide rail. The inspection platform includes a rotating platform fixed on the positioning platform. Inspection seats for receiving materials are arranged at intervals on the rotating platform. The inspection seats correspond to the vertical position of the visual inspection module; the inspection seats rotate with the rotating platform to produce a swinging motion, and the rotating platform is also provided with a rotating power source that drives the inspection seat to rotate around its own axis.

[0007] As a further solution of the present invention: the detection seat 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, and an air suction hole is opened in the light guide column to connect the storage groove with the air source, the air suction hole includes an axial air suction hole opened along the axial direction of the light guide column, and a radial air suction hole opened along the radial direction of the light guide column, and the radial air suction hole is arranged adjacent to the storage groove.

[0008] As a further solution of the present invention: a sealing seat is coaxially arranged on the outer ring of the light guide column, and the sealing seat and the light guide column are sealed by a sealing assembly. A flow gap is formed between the sealing assembly, the sealing seat and the light guide column, and an air source hole is provided on the sealing seat. The air source forms negative pressure adsorption on the material in the material tank through the air source hole, the flow gap and the air suction hole; the sealing assembly includes two groups of sealing rings, and the two groups of sealing rings are respectively located above and below the radial air suction hole, and a sealing groove is provided circumferentially on the light guide column for the sealing ring to be clamped and fixed.

[0009] As a further solution of the present invention: the rotational power source is a linear slider slidingly arranged along the length direction on the rotating platform, a guide rack is provided on the linear slider along the length direction, a transmission gear is coaxially arranged on the light guide column, the transmission gear and the guide rack form a gear rack match, and the detection seat is driven by the linear slider to rotate around its own axis.

[0010] As a further solution of the present invention: two sets of driving gears and driven gears with parallel axes are installed on the base, the driving gear is driven to rotate by the motor, the driven gear is coaxially arranged with the rotating axis of the rotating platform, and the driven gear and the driving gear are meshed or driven by a belt.

[0011] As a further solution of the present invention: the front inspection station and the back inspection station each include an inspection table and a variable-distance transfer platform that are slidably engaged with the conveying guide rail and are arranged in sequence in a direction away from the flip transfer module; the variable-distance transfer platform is used to arrange the materials at intervals;

[0012] Both the front inspection station and the back inspection station include a visual inspection module, a lifting and picking module and a storage and picking rail suspended above the conveying guide rail and arranged in sequence in the direction away from the flipping transfer module; the lifting and picking module is configured to transfer the materials on the variable-distance transfer platform to the inspection platform; the front inspection station and the back inspection station are respectively provided with a picking area and a storage area on the sides, and the variable-distance transfer platforms of the front inspection station and the back inspection station respectively store and pick up materials from the picking area and the storage area; the storage areas are symmetrically arranged on both sides of the back inspection station, and are used to store qualified materials and unqualified materials respectively.

[0013] As a further solution of the present invention: the material taking area includes a first stacking bin, a first loading bin and a taking bin arranged in sequence along the direction parallel to the conveying guide rail, a plurality of groups of empty storage trays are stacked from bottom to top in the first stacking bin, and the storage trays are provided with storage troughs arranged in a rectangular array for placing materials; the material taking area is provided with a pushing device that pushes the storage tray on the top layer of the first stacking bin to the first loading bin and the taking bin in sequence; the first loading bin is provided with a robot for loading the empty storage trays;

[0014] The material storage area includes a second stacking bin, a second loading bin and a material storage bin which are arranged in sequence along the parallel conveying guide rail. The material storage area is provided with a pushing device which pushes the storage tray on the material storage bin to the second loading bin and the second stacking bin in sequence; the storage trays containing materials are stacked from top to bottom in the second stacking bin; the material storage bins in the two material storage areas are respectively used to store qualified materials and unqualified materials; at least two groups of material storage manipulators are provided above the variable-distance transfer platform of the back inspection station, and the two groups of material storage manipulators are slidably installed on the storage and retrieval guide rail of the back inspection station, and transfer the qualified materials and unqualified materials on the variable-distance transfer platform to the corresponding material storage areas respectively.

[0015] As a further solution of the present invention: the material storage and retrieval guide rails and the conveying guide rails are arranged perpendicular to each other, and a lifting and retrieval hand is slidingly provided on the material storage and retrieval guide rails of the front detection station. The lifting and retrieval hand is driven by a cylinder to produce a vertical lifting action, and the working end of the lifting and retrieval hand is provided with an adsorption hand arranged perpendicular to the conveying guide rails, and multiple groups of adsorption areas are provided in a straight line direction on the adsorption hand to adsorb materials.

[0016] As a further solution of the present invention: positioning platforms are arranged at equal intervals on the variable-distance transfer platform along the direction of the vertical conveying guide rail, and each positioning platform is provided with an air suction head, which is used to adsorb materials from bottom to top, and each air suction head is located on the storage and retrieval path of the storage and retrieval guide rail.

[0017] As a further solution of the present invention: the flipping transfer module includes a flipping material picking arm and a transfer material picking arm. The flipping material picking arm is configured to adsorb the material on the detection table and then drive the material to flip 180 degrees. The transfer material picking arm and the frame of the flipping transfer module slide together along the arrangement direction of the conveying guide rails. The picking end of the transfer material picking arm is driven to rise and fall by the cylinder to adsorb the material on the flipping material picking arm from top to bottom.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention uses a turnover transfer module to achieve 180° automatic flipping of materials. Combined with the visual inspection modules arranged symmetrically on both sides, it can complete the inspection of both sides of the material at one time. The inspection, material collection, and storage and retrieval modules are symmetrically arranged on both sides of the conveyor guide rail. Combined with the sliding variable-distance transfer platform and the inspection table, a full-process closed loop of "inspection-turnover-reinspection-sorting" is formed. This can realize multi-angle and fully automated visual inspection of the front and back of the material, significantly improving the comprehensiveness and accuracy of material visual inspection.

[0020] 2. The dual storage area design of the present invention cooperates with the classification robot to realize the automatic sorting of qualified / unqualified materials; the combination of the stacking bin and the pushing device allows the storage tray to be recycled.

[0021] 3. The sliding design of the variable-distance transfer platform of the present invention supports the spacing adjustment of materials of different sizes, and is compatible with the adsorption and fixation of steel meshes of various materials in combination with the negative pressure adsorption method of the air suction head.

[0022] 4. The present invention drives the synchronous pitching and rotation of each detection seat on the rotating platform by means of gear transmission or pulley transmission, and drives each detection seat to rotate around its own axis in combination with the gear rack. By combining pitch and rotation, the material on the detection seat can be displaced at multiple angles, thereby improving the detection accuracy.

[0023] 5. The present invention sets a storage groove on the surface of the translucent light guide column. Through the cooperation of the air suction hole, the flow gap and the air source hole, the material can be accurately and stably adsorbed while the light guide column rotates freely. Combined with the illumination and light transmission of the light guide column by the backlight source, high light transmittance + vacuum sealing is achieved, which meets the requirements of the high light transmittance visual environment while allowing the material to be stably and accurately adsorbed and rotated at any angle.

[0024] 6. The present invention integrates optical light guidance and negative pressure adsorption functions by building axial and radial air suction holes into the light guide column. While fixing the material through the storage slot and negative pressure adsorption, the light transmittance of the light guide column is used to provide uniform backlight, forming backlight compensation. Since the axial air suction hole will produce light spot 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 placed close to the storage slot, thereby reducing the light spot generated on the material surface and weakening the impact of the light spot on visual detection, forming an anti-light spot design under the premise of back light supplement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a schematic top view of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the detection platform in the present invention.

[0028] Figure 4 It is a structural schematic diagram of the detection seat in the present invention.

[0029] Figure 5 for Figure 4 sectional view of .

[0030] Figure 6 It is a structural schematic diagram of the variable-distance transfer platform in the present invention.

[0031] In the picture:

[0032] 1. Base; 11. Reclaiming area;

[0033] 111. First stacking bin; 112. First loading bin; 113. Unloading bin;

[0034] 12. Material storage and retrieval guide rail; 121. Lifting and retrieval arm; 122. Suction arm;

[0035] 2. Conveying guide rail; 21. Variable distance transfer platform; 211. Positioning platform; 212. Air suction head;

[0036] 22. Testing table; 221. Base; 222. Driven gear; 223. Driving gear;

[0037] 224, rotating platform; 225, linear slider; 226, guide rack; 227, detection seat;

[0038] 2271, transmission gear; 2272, storage slot; 2273, light guide column;

[0039] 2274, air suction hole; 2275, sealing ring;

[0040] 228, sealing seat; 2281, air source hole; 2282, overflow gap; 229, backlight source;

[0041] 3. Lifting and reclaiming module; 4. Visual inspection module;

[0042] 5. Turnover transfer module; 51. Flip material picker; 52. Transfer material picker;

[0043] 6. Material storage area; 611. Second stacking bin; 612. Second loading bin; 613. Material storage bin;

[0044] 7. Material storage robot. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0046] See also Figures 1 to 5 In an embodiment of the present invention, a double-sided automated visual inspection system for irregular mesh components includes a conveyor rail 2 mounted on a base 1. A flipping transfer module 5, which is used to flip the irregular mesh components (hereinafter referred to as materials) 180 degrees, is suspended in the middle of the conveyor rail 2. Along the conveying direction of the conveyor rail 2, visual inspection modules 4, lifting and retrieving modules 3, and access rails 12 are symmetrically arranged on both sides of the flipping transfer module 5. The visual inspection modules 4, lifting and retrieving modules 3, and access rails 12 are arranged in sequence away from the flipping transfer module 5 and suspended above the conveyor rail 2. Two sets of visual inspection modules 4 are respectively used for front and back inspection of the materials. Two sets of lifting and retrieving modules 3 and two sets of access rails 12 also correspond to the front and back inspection processes, respectively. Both sets of access rails 12 are arranged perpendicular to the conveyor rails 2. The difference between them is that one set of access rails 12 is equipped with a lifting arm 121. After sliding along the access rails 12, the lifting arm 121 retrieves material from the access area 11 via a vertically rising suction arm 122. The suction arm 122 is located at the working end of the lifting arm 121 and has multiple suction zones arranged along a straight line to absorb the material. Two sets of access rails 12 are slidably mounted with two sets of access manipulators 7, which discharge material into two sets of access areas 6, respectively. Qualified and unqualified materials on the variable-length transfer platform 21 are transferred to their corresponding access areas 6.

[0047] Two sets of variable-distance transfer platforms 21 are slidably provided at both ends of the conveying guide rail 2, and two sets of inspection platforms 22 are slidably provided on the conveying guide rail 2, located between the two variable-distance transfer platforms 21. The sliding track of the variable-distance transfer platform 21 is located between the lifting and retrieving module 3 and the end of the conveying guide rail 2. The sliding track of the visual inspection module 4 is located between the lifting and retrieving module 3 and the flipping transfer module 5. The visual inspection module 4 is a prior art, so the 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 plumb direction. The two sets of variable-distance transfer platforms 21 are used in conjunction with material storage and material retrieval, respectively. Positioning platforms 211 are equidistantly spaced on the variable-distance transfer platform 21 in the direction perpendicular to the conveying guide rail 2. Each positioning platform 211 is provided with an air suction head 212. The air suction head 212 is used to absorb materials from bottom to top. Each air suction head 212 is located on the material storage and retrieval path of the material storage and retrieval guide rail 12. The air suction head 212 is arranged in a trough shape, and the shape of the trough body corresponds to the shape of the material.

[0048] Along the conveying direction of the conveying guide rail 2, a material taking area 11 is set on one side of the starting end of the conveying guide rail 2, and material storage areas 6 are symmetrically set on both sides of the terminal end of the conveying guide rail 2; the two groups of material storage areas 6 are used to store qualified materials and unqualified materials respectively.

[0049] The material retrieving area 11 includes a first stacking bin 111, a first loading bin 112, and a retrieving bin 113, which are arranged in sequence along the direction parallel to the conveying guide rail 2. Multiple groups of empty storage trays are stacked from bottom to top in the first stacking bin 111. A hydraulic lifting module or an elastic lifting module can be provided in the first stacking bin 111 to lift the storage trays. The retrieving area 11 is provided with a pushing device that pushes the top storage tray of the first stacking bin 111 to the first loading bin 112 and the retrieving bin 113 in sequence. The pushing device can be a linear power source such as an electric push rod or a cylinder. A manipulator is provided at the first loading bin 112 to load the empty storage trays, or manual loading can be performed directly at the first loading bin 112.

[0050] The storage area 6 includes a second stacking bin 611, a second loading bin 612 and a storage bin 613 arranged in sequence along the direction parallel to the conveying guide rail 2. The storage area 6 is provided with a pushing device that pushes the storage tray on the storage bin 613 to the second loading bin 612 and the second stacking bin 611 in sequence; 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 respectively used to store qualified materials and unqualified materials.

[0051] After materials from the reclaiming area 11 are transferred to the variable-pitch transfer platform 21 via the storage and reclaiming guide rails 12, they are evenly spaced, corresponding to the lens arrangement spacing of the visual inspection module 4. The variable-pitch transfer platform 21 carries the materials to the bottom of the lifting and reclaiming module 3. After the lifting and reclaiming module 3 raises and lowers to absorb the materials, the inspection platform 22 moves to the bottom of the lifting and reclaiming module 3 and receives the materials.

[0052] The inspection platform 22 includes a rotating platform 224 fixed to the positioning platform 211. The rotating axis of the rotating platform 224 is arranged along the vertical conveying guide rail 2. Inspection seats 227 for receiving materials are arranged at intervals on the rotating platform 224. The inspection seats 227 rotate with the rotating platform 224 to produce a pitching motion. A linear slider 225 is slidingly provided along the length of the rotating platform 224. The linear slider 225 is driven by a cylinder or a linear motor to slide along the length of the rotating platform 224. The sliding path of the linear slider 225 is parallel to the rotation axis of the rotating platform 224. A guide rack 226 is provided along the length of the linear slider 225. The guide rack 226 and the transmission gears 2271 on the inspection seat 227 form a gear rack transmission.

[0053] The detection base 227 includes a translucent light guide column 2273 that rotatably engages with the rotating platform 224, and a transmission gear 2271 coaxially arranged at the bottom of the light guide column 2273. A storage slot 2272 for positioning materials is located at the top of the light guide column 2273. The storage slot 2272 is connected to a negative pressure source through an air suction hole 2274 on the detection base 227 to absorb materials under negative pressure. A backlight source 229 is located within the rotating platform 224 and contacts the light guide column 2273. The light guide column 2273 rotatably engages with the rotating platform 224 and the sealing base 228 via a bearing structure.

[0054] The rotating platform 224 is provided with a sealing seat 228 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 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 enclose a flow gap 2282. The light guide column 2273 is provided with an air intake hole 2274, which connects the flow gap 2282 with the storage groove 2272. The sealing seat 228 is provided with an air source hole 2281, which connects the air source with the flow gap 2282. The two sets of sealing rings 2275 are located above and below the radial air intake hole, respectively. A sealing groove is provided circumferentially on the light guide column 2273 for the sealing rings 2275 to engage and secure.

[0055] The air suction holes 2274 include an axial air suction hole opened along the axial direction of the light guide column 2273 and radial air suction holes opened along the radial direction of the light guide column 2273. The radial air suction holes are arranged adjacent to the storage slot 2272. To minimize the effect of light spots caused by the light source shining on the air suction holes, the radial air suction holes are arranged as close to the storage slot 2272 as possible, thereby minimizing the length of the axial air suction holes. The length of the axial air suction holes is preferably less than one-tenth of the axial length of the light guide column 2273.

[0056] Two sets of driving gears 223 and driven gears 222 with parallel axes are installed on the base 221. The driving gear 223 is driven to rotate by the motor, and the driven gear 222 is coaxially arranged with the rotating axis of the rotating platform 224. The driven gear 222 and the driving gear 223 are meshed with each other or driven by a belt, so that they rotate synchronously.

[0057] The flip transfer module 5 includes a flip picker 51 and a transfer picker 52. The flip picker 51 is configured to absorb material from the inspection table 22 and then flip it 180 degrees. Since the flip picker 51's structure is conventional, it will not be described in detail. Its working section is equipped with a suction assembly similar to the air suction head 212, which absorbs material from top to bottom. The transfer picker 52 slides with the frame of the flip transfer module 5 along the direction of the conveyor rails 2. The transfer picker 52's pick-up end is driven by a pneumatic cylinder to lift and lower material absorbed by the flip picker 51 from top to bottom.

[0058] The specific steps of the overall detection are as follows:

[0059] S1. The top empty storage tray in the first stacking bin 111 is pushed to the first loading bin 112 by a pushing device such as an air cylinder or a hydraulic cylinder. After all the materials to be tested are loaded into the storage trough of the storage tray by a robot or manual loading, the pushing device pushes the storage tray filled with materials to the unloading bin 113.

[0060] S2. The lifting and retrieving hand 121 on the storage and retrieving guide rail 12 on one side of the retrieving area 11 is driven by the servo motor to slide along the storage and retrieving guide rail 12 and move to above the retrieving bin 113. After the suction hand 122 on the lifting and retrieving hand 121 is lifted vertically, it absorbs a row of materials in the storage tray by negative pressure adsorption.

[0061] S3. After sucking the material, the suction hand 122 drives the material upward and slides along the material storage and retrieval guide rail 12 with the lifting and retrieving hand 121 to reach above each variable-distance transfer platform 21; the suction hand 122 places the sucked material on the air suction head 212 of each positioning platform 211 in sequence through the lifting movement, so that the material is evenly spaced on the variable-distance transfer platform 21;

[0062] S4, the variable-distance transfer platform 21 drives the material to slide along the conveying guide rail 2 to the lifting and reclaiming module 3. After the working end of the lifting and reclaiming module 3 is driven by hydraulic pressure to descend, it absorbs the air suction heads 212 on each positioning platform 211 by negative pressure adsorption, and then drives the material to rise, and then the variable-distance transfer platform 21 is reset;

[0063] S5. The inspection platform 22 slides along the conveying guide rail 2 to the bottom of the lifting and picking module 3. The materials sucked by the lifting and picking module 3 are released into the storage slots 2272 of the inspection platform 22. The inspection platform 22 slides to the bottom of the visual inspection module 4 with the materials.

[0064] S6. The inspection table 22 drives the rotating platform 224 to rotate. At the same time, the inspection base 227 on the inspection table 22 is driven to rotate by the gear rack. Under the state of overall pitch rotation + rotation of the inspection base 227, the visual inspection module 4 is started to perform visual inspection at various angles on the front of the material.

[0065] S7. After the inspection is completed, the inspection table 22 is reset and moved to the flip transfer module 5. After the flip material picking hand 51 of the flip transfer module 5 adsorbs the materials on the inspection table 22, it drives the materials to flip 180 degrees, changing from adsorbing the materials from top to bottom to adsorbing the materials from bottom to top, so that the back of the materials are arranged facing upwards; after the transfer material picking hand 52 slides along the flip transfer module 5 to the top of the flip material picking hand 51, it rises and falls vertically and adsorbs the materials, and transports the materials to the inspection table 22 on the other side of the flip transfer module 5.

[0066] S8, the inspection table 22 on the other side carries the material to the bottom of the visual inspection module 4 on the other side of the turning transfer module 5, and repeats step S6 to perform visual inspection at various angles on the back of the material;

[0067] S9. After the inspection is completed, the inspection platform 22 moves with the material to the bottom of the lifting and retrieving module 3 on the other side of the turning transfer module 5. The lifting and retrieving module 3 lifts and absorbs the material after the visual inspection of the front and back sides.

[0068] S10, the variable-distance transfer platform 21 of the adjacent storage area 6 moves to the bottom of the lifting and picking module 3, and the air suction head 212 receives and absorbs the material on the lifting and picking module 3. The variable-distance transfer platform 21 moves between the two groups of storage areas 6 as a cache platform, and two groups of storage manipulators 7 respectively absorb qualified materials and unqualified materials to the corresponding storage areas 6. After each storage tray is filled with materials, they enter the second stacking bin 611 for stacking and storage.

[0069] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0070] The block diagrams of the devices, devices, equipment, 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 will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

Claims

1. A double-sided automated visual inspection system based on special-shaped mesh components, characterized in that: The invention comprises a conveying guide rail (2) provided on a base (1) for conveying materials, and further comprises a front detection station, a flip transfer module and a back detection station arranged in sequence along the conveying direction of the conveying guide rail (2); the front detection station and the back detection station are configured to respectively perform visual inspections on the front and back of the materials, and the flip transfer module is configured to perform flipping operations on the materials; Both the front detection station and the back detection station are provided with a detection platform (22) that is slidably matched with the conveying guide rail (2). The detection platform (22) includes a rotating platform (224) fixed on the positioning platform (211). Detection seats (227) for receiving materials are arranged at intervals on the rotating platform (224). The detection seats (227) correspond to the vertical position of the visual detection module (4). The detection seat (227) rotates with the rotating platform (224) to generate a swinging motion. The rotating platform (224) is also provided with a rotation power source that drives the detection seat (227) to rotate around its own axis.

2. The double-sided automated visual inspection system based on special-shaped mesh components according to claim 1, 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 provided 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).

3. The double-sided automated visual inspection system based on special-shaped mesh components according to claim 2, characterized in that: A sealing seat (228) is coaxially arranged on the outer ring of the light guide column (2273), and the sealing seat (228) and the light guide column (2273) are sealed by a sealing assembly. A flow gap (2282) is formed between the sealing assembly, the sealing seat (228) and the light guide column (2273). An air source hole (2281) is provided on the sealing seat (228), and the air source forms negative pressure adsorption on the material in the material groove (2272) through the air source hole (2281), the flow gap (2282) and the air suction hole (2274); the sealing assembly includes two groups of sealing rings (2275), and the two groups of sealing rings (2275) are respectively located above and below the radial air suction hole. A sealing groove is provided on the light guide column (2273) along the circumference for the sealing ring (2275) to be clamped and fixed.

4. A double-sided automated visual inspection system based on special-shaped mesh components according to any one of claims 1 to 3, characterized in that: The rotational power source is a linear slider (225) slidably arranged along the length direction on the rotating platform (224); a guide rack (226) is provided on the linear slider (225) along the length direction; a transmission gear (2271) is coaxially arranged on the light guide column (2273); the transmission gear (2271) and the guide rack (226) form a gear rack match; the detection seat (227) is driven by the linear slider (225) to rotate around its own axis.

5. The double-sided automated visual inspection system based on special-shaped mesh components according to claim 4, characterized in that: Two sets of driving gears (223) and driven gears (222) with parallel axes are installed on the base (221). The driving gear (223) is driven to rotate by a motor. The driven gear (222) is coaxially arranged with the rotating axis of the rotating platform (224). The driven gear (222) and the driving gear (223) are meshed or driven by a belt.

6. A double-sided automated visual inspection system based on special-shaped mesh components according to any one of claims 1 to 3, characterized in that: The front inspection station and the back inspection station both comprise an inspection table (22) and a variable-distance transfer platform (21) that are slidably matched with the conveying guide rail (2) and are sequentially arranged in a direction away from the flip transfer module (5); the variable-distance transfer platform (21) is used to arrange the materials at intervals; The front inspection station and the back inspection station both comprise a visual inspection module (4), a lifting and retrieving module (3), and a material storage and retrieval guide rail (12) suspended above a conveying guide rail (2) and arranged in sequence in a direction away from a flip transfer module (5); the lifting and retrieving module (3) is configured to transfer materials on a variable-distance transfer platform (21) to an inspection platform (22); a retrieving area (11) and a material storage area (6) are respectively provided on the sides of the front inspection station and the back inspection station, and the variable-distance transfer platforms (21) of the front inspection station and the back inspection station respectively retrieve and store materials from the retrieving area (11) and the material storage area (6); the material storage area (6) is symmetrically arranged on both sides of the back inspection station and is used to store qualified materials and unqualified materials respectively.

7. The double-sided automated visual inspection system based on special-shaped mesh components according to claim 6, characterized in that: The material taking area (11) comprises a first stacking bin (111), a first loading bin (112) and a material taking bin (113) arranged in sequence along a direction parallel to the conveying guide rail (2); a plurality of groups of empty material storage trays are stacked from bottom to top in the first stacking bin (111); the material storage trays are provided with storage troughs arranged in a rectangular array for placing materials; the material taking area (11) is provided with a pushing device for pushing the uppermost material storage tray of the first stacking bin (111) to the first loading bin (112) and the material taking bin (113) in sequence; and a manipulator for loading the empty material storage trays is arranged at the first loading bin (112); The material storage area (6) comprises a second stacking bin (611), a second loading bin (612) and a material storage bin (613) which are sequentially arranged along a direction parallel to the conveying guide rail (2); the material storage area (6) is provided with a pushing device for sequentially pushing the material storage tray on the material storage bin (613) to the second loading bin (612) and the second material storage bin (611); the material storage trays storing materials are stacked from top to bottom in the second stacking bin (611); the material storage bins (613) of the two material storage areas (6) are respectively used to store qualified materials and unqualified materials; at least two groups of material storage manipulators (7) are provided above the variable distance transfer platform (21) of the back detection station, and the two groups of material storage manipulators (7) are slidably mounted on the material storage and retrieval guide rail (12) of the back detection station, and respectively transfer qualified materials and unqualified materials on the variable distance transfer platform (21) to the corresponding material storage area (6).

8. The double-sided automated visual inspection system based on special-shaped mesh components according to claim 6, characterized in that: The material storage and retrieval guide rail (12) and the conveying guide rail (2) are arranged perpendicular to each other. A lifting and retrieval hand (121) is slidably provided on the material storage and retrieval guide rail (12) of the front detection station. The lifting and retrieval hand (121) is driven by a cylinder to generate a vertical lifting action. A suction hand (122) arranged perpendicular to the conveying guide rail (2) is provided at the working end of the lifting and retrieval hand (121). A plurality of suction areas are provided on the suction hand (122) along a straight line direction to absorb materials.

9. The double-sided automated visual inspection system based on special-shaped mesh components according to claim 6, characterized in that: Positioning platforms (211) are arranged at equal intervals on the variable-distance transfer platform (21) along the direction of the vertical conveying guide rail (2). Each positioning platform (211) is provided with an air suction head (212). The air suction head (212) is used to absorb materials from bottom to top. Each air suction head (212) is located on the material storage and retrieval path of the material storage and retrieval guide rail (12).

10. The double-sided automated visual inspection system based on special-shaped mesh components according to claim 6, characterized in that: The flip transfer module (5) includes a flip material picker (51) and a transfer material picker (52). The flip material picker (51) is configured to absorb the material on the detection table (22) and then drive the material to flip 180 degrees. The transfer material picker (52) and the frame of the flip transfer module (5) are slidably matched along the arrangement direction of the conveying guide rail (2). The material picking end of the transfer material picker (52) is driven by a cylinder to rise and fall, so as to absorb the material on the flip material picker (51) from top to bottom.

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