Printed matter defect detection device based on machine vision
By designing a machine vision-based defect detection device for printed materials, the problem of low detection efficiency caused by manual flipping and sorting was solved, realizing automated two-sided detection and neat collection, which significantly improved detection efficiency.
Patent Information
- Application Number
- CN202422626759.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2034-10-30
AI Technical Summary
Current technology requires manual operation of flipping and sorting of printed materials to detect defects, resulting in low detection efficiency.
Design a machine vision-based printing defect detection device, including a feeding, flipping, and collection mechanism. The device uses a vision inspection mechanism to automatically detect defects on both sides of the printed material, and the flipping mechanism enables automatic flipping and neat collection.
It improves the efficiency of printed material defect detection, realizes automated two-sided inspection and neat collection, and significantly improves inspection efficiency.
Smart Images
Figure CN223581822U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to printed matter detection technical field, concretely relates to printed matter defect detection device based on machine vision. BACKGROUND
[0002] Printed matter, printed book, picture etc. are various products of printing, are the general term of various finished products using printing technology production, in daily life, the newspaper, book magazine, map, poster, advertisement, envelope, stationery, file bag, trademark, label, visiting card, invitation card, banknote, greeting card, calendar, hanging calendar, picture album, various certificate, packing box, gift box, circuit board etc. that people contact, should have, all belong to the category of printed matter, paper printed matter refers to paper printed matter, after printing, usually needs to carry out defect detection to printed matter, printed matter detection mainly divides into two parts: paper quality detection and printing content detection, printing content detection mainly includes: white page, wrong page, ghosting, etc. Project detection.
[0003] In the prior art, when printed matter is detected for defects, most of the printed matter is placed on a visual detection table for detection by manual operation, since one side of the printed matter needs to be turned over for detection after one side is detected, these operations need to be carried out manually, resulting in low detection efficiency of the printed matter, and when a batch of printed matter is detected, the printed matter that has been detected needs to be rearranged, further reducing the detection efficiency.
[0004] Therefore, it is particularly important to design a printed matter defect detection device based on machine vision to solve the above problems. UTILITY MODEL CONTENT
[0005] In view of the deficiencies of the prior art, the utility model designs a printed matter defect detection device based on machine vision, which aims to solve the technical problems of low detection efficiency caused by manual operation for detection and subsequent manual rearrangement in the prior art.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] The printed matter defect detection device based on machine vision comprises a first conveying table and a second conveying table, the front end of the first conveying table is fixedly provided with a feeding box, the inner side of the feeding box is slidably connected with a first lifting plate, the top of the first lifting plate is hingedly connected with a top lifting plate, the top end of the feeding box is rotatably connected with an auxiliary roller, the right side of the first conveying table and the second conveying table is fixedly provided with a visual detection mechanism, a turning mechanism is installed between the first conveying table and the second conveying table, the rear end of the second conveying table is fixedly provided with a receiving box, the inner side of the receiving box is slidably connected with a second lifting plate.
[0008] As the preferred scheme of the utility model, the first threaded rod is rotationally connected to the left side of the feeding box, a first motor is fixedly installed at the top end of the left side of the feeding box, the driving end of the first motor is fixedly connected to the top end of the first threaded rod, the left end of the first lifting plate is threadedly connected to the first threaded rod, and the left and right sides of the first lifting plate are slidingly connected to the feeding box through first sliding grooves.
[0009] As the preferred scheme of the utility model, the first threaded rod is rotationally connected to the left side of the feeding box, a first motor is fixedly installed at the top end of the left side of the feeding box, the driving end of the first motor is fixedly connected to the top end of the first threaded rod, the left end of the first lifting plate is threadedly connected to the first threaded rod, and the left and right sides of the first lifting plate are slidingly connected to the feeding box through first sliding grooves.
[0010] As the preferred scheme of the utility model, the second motor is fixedly installed at the top end of the right side of the feeding box, and the driving end of the second motor is fixedly connected to the right end of the auxiliary roller.
[0011] As the preferred scheme of the utility model, the visual detection mechanism comprises a lifting frame fixedly installed on the right side of the first conveying table and the second conveying table, a second threaded rod is rotationally connected to the inner side of the lifting frame, a third motor is fixedly installed at the top of the lifting frame, the driving end of the third motor is fixedly connected to the top end of the second threaded rod, an adjusting plate is slidingly connected to the inner side of the lifting frame, the rear end of the adjusting plate is threadedly connected to the second threaded rod, a visual camera is fixedly installed at the front end of the adjusting plate, and a light supplementing lamp is fixedly installed at the front end of the adjusting plate and outside the visual camera.
[0012] As the preferred scheme of the utility model, the turning mechanism comprises two groups of connecting plates fixedly installed between the first conveying table and the second conveying table, a rotating drum is rotationally connected between the two groups of connecting plates, a plurality of material clamping grooves are equidistantly formed in the inner side of the rotating drum, a fourth motor is fixedly installed on the outer side of the connecting plate, and the driving end of the fourth motor is fixedly connected to the left end of the rotating drum.
[0013] As the preferred scheme of the utility model, the back of the material collecting box is provided with a material taking groove, a third threaded rod is rotationally connected to the left side of the material collecting box, a fifth motor is fixedly installed at the top end of the left side of the material collecting box, the driving end of the fifth motor is fixedly connected to the top end of the third threaded rod, the left end of the second lifting plate is threadedly connected to the third threaded rod, and the left and right sides of the second lifting plate are slidingly connected to the material collecting box through second sliding grooves.
[0014] Compared with the prior art, the utility model has the advantages that:
[0015] 1. In the utility model, through the cooperation design of the feeding box, the first lifting plate, the top feeding plate and the auxiliary roller, when the printed matter is detected, first, the batch of printed matters are placed on the top feeding plate on the inner side of the feeding box, then the first lifting plate drives the printed matter to rise, the topmost printed matter stops rising when it is about to be topped to the auxiliary roller, then the front end of the top feeding plate is lifted up, thereby driving the printed matter to slightly incline, so that the rear end of the top of the topmost printed matter abuts against the auxiliary roller, the auxiliary roller is driven to roll by the second motor, so that the topmost printed matter slides obliquely backward, thereby the batch of printed matters are sent into the inner side of the first conveying table one by one for defect detection, and the detection efficiency is greatly improved.
[0016] 2. In the utility model, through the cooperation design of the first conveying table, the second conveying table, the visual detection mechanism and the turnover mechanism, when the printed matter on the first conveying table reaches below the visual camera, the upper surface of the printed matter is detected by the visual camera, then the printed matter is continuously conveyed, then the lower surface of the printed matter is detected by the visual camera on the second conveying table after being turned over by the turnover mechanism, thereby the detection of both sides of the printed matter is automatically completed, and the detection efficiency is further improved.
[0017] 3. In the utility model, through the design of the material collecting box, the printed matter with defects is taken down from the second conveying table, and before the printed matter with no defects reaches the position of the material collecting box, the second lifting plate is first lifted to the height of the bottom of the printed matter, so that the printed matter on the second conveying table is automatically guided into the inside of the material collecting box, and after the printed matter enters the inside of the material collecting box, it abuts against the rear end in the inside of the material collecting box, thereby the printed matter is automatically arranged in order, the second lifting plate is slowly lowered with the increase of the printed matter, and then the collection and arrangement of the printed matter are automatically completed, and the detection efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0018] Figure 1 It is the whole structure schematic view of the utility model;
[0019] Figure 2 It is the feeding box structure schematic view of the utility model;
[0020] Figure 3 It is the first lifting plate and top feeding plate structure schematic view of the utility model;
[0021] Figure 4 It is the visual detection mechanism structure schematic view of the utility model;
[0022] Figure 5 It is the turnover mechanism structure schematic view of the utility model;
[0023] Figure 6 It is the material collecting box structure schematic view of the utility model.
[0024] In the figure: 1, first conveying table; 2, second conveying table; 3, feeding box; 301, first threaded rod; 302, first motor; 303, first sliding groove; 4, first lifting plate; 401, mounting frame; 402, hydraulic cylinder; 5, top plate; 6, auxiliary roller; 601, second motor; 7, visual detection mechanism; 701, lifting frame; 702, second threaded rod; 703, third motor; 704, adjusting plate; 705, visual camera; 706, light supplement lamp; 8, turning-over mechanism; 801, connecting plate; 802, rotating drum; 803, material clamping groove; 804, fourth motor; 9, collecting box; 901, material taking groove; 902, third threaded rod; 903, fifth motor; 904, second sliding groove; 10, second lifting plate. DETAILED DESCRIPTION
[0025] The technical scheme in the embodiments of the utility model will be apparently and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. Embodiment:
[0026] Please refer to Figures 1-6 The utility model provides a technical scheme:
[0027] The printed matter defect detection device based on machine vision, including first conveying table 1 and second conveying table 2, first conveying table 1's front end fixed installation has feeding box 3, the inside slide coupling of feeding box 3 has first lifting plate 4, the top of first lifting plate 4 is hinged with top plate 5, the top of feeding box 3 is rotatably connected with auxiliary roller 6, the right side of first conveying table 1 and second conveying table 2 is fixedly installed with visual detection mechanism 7, and the turning-over mechanism 8 is installed between first conveying table 1 and second conveying table 2, the rear end of second conveying table 2 is fixedly installed with collecting box 9, and the inside slide coupling of collecting box 9 has second lifting plate 10.
[0028] First, the left side of feeding box 3 is rotatably connected with first threaded rod 301, and the top of the left side of feeding box 3 is fixedly installed with first motor 302, the driving end of first motor 302 is fixedly connected with the top end of first threaded rod 301, the left end of first lifting plate 4 is threadedly connected with first threaded rod 301, and the left and right sides of first lifting plate 4 are slidably connected with feeding box 3 through first sliding groove 303, when the printed matter is detected for defects, first motor 302 is started to drive first threaded rod 301 to rotate, and first lifting plate 4 is stably driven to move upwards under the assistance of first sliding groove 303, so as to drive the printed matter to rise.
[0029] Further, the front end of the bottom of the first lifting plate 4 is fixedly provided with a mounting bracket 401, the inner side of the mounting bracket 401 is hingedly provided with a hydraulic cylinder 402, and the output end of the hydraulic cylinder 402 is hingedly connected to the front end of the bottom of the material lifting plate 5. After the batch of printed matters are lifted, the topmost printed matter will stop rising when it is about to be lifted to the auxiliary roller 6, and then the hydraulic cylinder 402 is started to lift the front end of the material lifting plate 5, so as to slightly tilt the printed matters, so that the rear end of the top of the topmost printed matter abuts against the auxiliary roller 6.
[0030] Then, the top end of the right side of the feeding box 3 is fixedly provided with a second motor 601, the driving end of the second motor 601 is fixedly connected to the right end of the auxiliary roller 6, the auxiliary roller 6 is driven to roll by the second motor 601, so that the topmost printed matter is obliquely slid backward, so as to feed the batch of printed matters into the inner side of the first conveying table 1 for defect detection, and then the batch of printed matters are automatically fed and detected, so as to greatly improve the detection efficiency.
[0031] Further, the vision detection mechanism 7 comprises a lifting frame 701 fixedly provided on the right sides of the first conveying table 1 and the second conveying table 2, a second threaded rod 702 rotatably connected to the inner side of the lifting frame 701, a third motor 703 fixedly provided on the top of the lifting frame 701, a driving end of the third motor 703 fixedly connected to the top end of the second threaded rod 702, an adjusting plate 704 slidably connected to the inner side of the lifting frame 701, a rear end of the adjusting plate 704 threadedly connected to the second threaded rod 702, a vision camera 705 fixedly provided on the front end of the adjusting plate 704, a light supplementing lamp 706 fixedly provided on the front end of the adjusting plate 704 and outside the vision camera 705. When the printed matters on the first conveying table 1 reach below the vision camera 705, the upper surface of the printed matters is detected by the vision camera 705, then the lower surface of the printed matters is detected after being turned over by the turning mechanism 8. In this process, the third motor 703 is started to drive the second threaded rod 702 to rotate, so that the adjusting plate 704 moves up and down to adjust the height of the vision camera 705 according to the detection requirement, and the light supplementing lamp 706 is used for light supplementing and auxiliary detection during the detection process.
[0032] Secondly, the turnover mechanism 8 comprises two groups of connecting plates 801 fixedly installed between the first conveying table 1 and the second conveying table 2, a rotating drum 802 is rotatably connected between the two groups of connecting plates 801, a plurality of material clamping grooves 803 are equidistantly arranged on the inner side of the rotating drum 802, a fourth motor 804 is fixedly installed on the outer side of the connecting plate 801, and the driving end of the fourth motor 804 is fixedly connected with the left end of the rotating drum 802. After the upper surface of the printed matter is detected by the visual camera 705 on the first conveying table 1, the printed matter is continuously conveyed, and when the printed matter reaches the position of the rotating drum 802, the printed matter is automatically guided into the inner side of the material clamping groove 803. The fourth motor 804 drives the rotating drum 802 to rotate, and the printed matter is turned over to the second conveying table 2. Then, the other surface of the printed matter is detected by the visual camera 705 on the second conveying table 2, so that the detection of both surfaces of the printed matter is automatically completed, and the detection efficiency is further improved.
[0033] Finally, a material taking groove 901 is arranged on the back of the material collecting box 9, a third threaded rod 902 is rotatably connected to the left side of the material collecting box 9, a fifth motor 903 is fixedly installed on the top end of the left side of the material collecting box 9, the driving end of the fifth motor 903 is fixedly connected with the top end of the third threaded rod 902, the left end of the second lifting plate 10 is threadedly connected with the third threaded rod 902, and the left and right sides of the second lifting plate 10 are slidably connected with the material collecting box 9 through the second sliding groove 904. The printed matter with defects is taken from the second conveying table 2, and the printed matter that passes the detection is first driven to rotate by the fifth motor 903 before reaching the position of the material collecting box 9, and the second lifting plate 10 is stably driven to rise to the height of the bottom of the printed matter under the assistance of the second sliding groove 904, so that the printed matter on the second conveying table 2 is automatically guided into the interior of the material collecting box 9. When the printed matter enters the interior of the material collecting box 9, it will abut against the rear end in the interior of the material collecting box 9, so as to automatically arrange the printed matter in order. With the increase of the printed matter, the second lifting plate 10 slowly descends, and the collection and arrangement of the printed matter are automatically completed, and the detection efficiency is further improved.
[0034] In the embodiment, the specific implementation scene is that when the printed matter is detected for defects, the batch of printed matters are placed on the top material plate 5 inside the feeding box 3, then the first motor 302 is started to drive the first threaded rod 301 to rotate, the first lifting plate 4 is stably driven to move upward under the assistance of the first sliding groove 303, thereby driving the printed matters to move upward, the topmost printed matter stops moving upward when it is about to be pushed against the auxiliary roller 6, then the front end of the top material plate 5 is lifted upward, thereby driving the printed matters to slightly tilt, so that the rear end of the top of the topmost printed matter abuts against the auxiliary roller 6, the auxiliary roller 6 is driven to roll by the second motor 601, so that the topmost printed matter slides obliquely backward, thereby feeding the batch of printed matters into the inside of the first conveying table 1 for defect detection, when the printed matters on the first conveying table 1 reach below the vision camera 705, the upper surface of the printed matters is detected for defects by the vision camera 705, then the printed matters are continuously conveyed, after reaching the position of the rotating drum 802, the printed matters are automatically guided into the inside of the clamping groove 803, the rotating drum 802 is driven to rotate by the fourth motor 804, the printed matters are turned over to the second conveying table 2, then the other surface of the printed matters is detected for defects by the vision camera 705 on the second conveying table 2, the printed matters with defects are taken away from the second conveying table 2, and the printed matters that pass the detection are guided into the inside of the receiving box 9 before reaching the position of the receiving box 9, the third threaded rod 902 is driven to rotate by the fifth motor 903, the second lifting plate 10 is stably driven to move upward to the height of the bottom of the printed matters under the assistance of the second sliding groove 904, so that the printed matters on the second conveying table 2 are automatically guided into the inside of the receiving box 9, and the printed matters enter the inside of the receiving box 9 and abut against the rear end inside the receiving box 9, thereby being automatically arranged in order, the second lifting plate 10 is slowly lowered with the increase of the printed matters, thereby automatically collecting and arranging the printed matters, the whole operation process is simple and convenient, compared with the existing defect detection method of the printed matters, the printed matters can be automatically fed and detected, the detection of both surfaces of the printed matters and the collection and arrangement of the printed matters are automatically completed, and the detection efficiency is greatly improved.
[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A machine vision-based printing defect detection device, comprising a first conveyor table (1) and a second conveyor table (2), characterized in that: A feeding box (3) is fixedly installed at the front end of the first conveyor (1). A first lifting plate (4) is slidably connected to the inner side of the feeding box (3). A top plate (5) is hinged to the top of the first lifting plate (4). An auxiliary roller (6) is rotatably connected to the top of the feeding box (3). A visual inspection mechanism (7) is fixedly installed on the right side of both the first conveyor (1) and the second conveyor (2). A flipping mechanism (8) is installed between the first conveyor (1) and the second conveyor (2). A receiving box (9) is fixedly installed at the rear end of the second conveyor (2). A second lifting plate (10) is slidably connected to the inner side of the receiving box (9).
2. The machine vision-based printing defect detection device according to claim 1, characterized in that: The left side of the feeding box (3) is rotatably connected to a first threaded rod (301), and the top of the left side of the feeding box (3) is fixedly installed with a first motor (302). The driving end of the first motor (302) is fixedly connected to the top of the first threaded rod (301). The left end of the first lifting plate (4) is threadedly connected to the first threaded rod (301). The left and right sides of the first lifting plate (4) are slidably connected to the feeding box (3) through the first sliding groove (303).
3. The machine vision-based printing defect detection device according to claim 1, characterized in that: A mounting bracket (401) is fixedly installed at the front end of the bottom of the first lifting plate (4). A hydraulic cylinder (402) is hinged to the inner side of the mounting bracket (401), and the output end of the hydraulic cylinder (402) is hinged to the front end of the bottom of the top plate (5).
4. The machine vision-based printing defect detection device according to claim 1, characterized in that: A second motor (601) is fixedly installed at the top right side of the feeding box (3), and the driving end of the second motor (601) is fixedly connected to the right end of the auxiliary roller (6).
5. The machine vision-based printing defect detection device according to claim 1, characterized in that: The visual inspection mechanism (7) includes a lifting frame (701) fixedly installed on the right side of the first conveyor (1) and the second conveyor (2). The inner side of the lifting frame (701) is rotatably connected to a second threaded rod (702). The top of the lifting frame (701) is fixedly installed with a third motor (703). The drive end of the third motor (703) is fixedly connected to the top end of the second threaded rod (702). The inner side of the lifting frame (701) is slidably connected with an adjustment plate (704). The rear end of the adjustment plate (704) is threadedly connected to the second threaded rod (702). The front end of the adjustment plate (704) is fixedly installed with a visual camera (705). The front end of the adjustment plate (704) and the outer side of the visual camera (705) are fixedly installed with a supplementary light (706).
6. The machine vision-based printing defect detection device according to claim 1, characterized in that: The flipping mechanism (8) includes two sets of connecting plates (801) fixedly installed between the first conveyor table (1) and the second conveyor table (2). A rotating drum (802) is rotatably connected between the two sets of connecting plates (801). Multiple sets of material slots (803) are equally spaced on the inner side of the rotating drum (802). A fourth motor (804) is fixedly installed on the outer side of the connecting plate (801), and the driving end of the fourth motor (804) is fixedly connected to the left end of the rotating drum (802).
7. The machine vision-based printing defect detection device according to claim 1, characterized in that: The receiving box (9) has a material chute (901) on its back. The left side of the receiving box (9) is rotatably connected to a third threaded rod (902). The top of the left side of the receiving box (9) is fixedly installed with a fifth motor (903). The driving end of the fifth motor (903) is fixedly connected to the top of the third threaded rod (902). The left end of the second lifting plate (10) is threadedly connected to the third threaded rod (902). The left and right sides of the second lifting plate (10) are slidably connected to the receiving box (9) through the second sliding groove (904).