Industrial vision-based zero-paper-powder zero-paper-wool paperboard detection equipment and detection method thereof

Abstract

The invention relates to zero-paper-powder and zero-paper-wool paperboard detection equipment based on industrial vision and a detection method thereof, and belongs to the technical field of paperboard detection. Comprising a conveying frame and a conveyor, a conveying piece is arranged in the conveying frame and used for conveying paperboards, a bottom frame and a top frame are fixedly connected between the conveying frame and the conveyor, detection mechanisms are arranged on the opposite sides of the top frame and the bottom frame and used for detecting the upper face and the lower face of the paperboards, and a conveying assembly is arranged in the top frame and used for changing the detection faces of the paperboards. Under the action of negative pressure, paperboards can be conveyed, the bottoms of the paperboards are exposed, the bottoms of the paperboards can be conveniently detected, the detection comprehensiveness and accuracy are improved, meanwhile, the paperboards can be shaken through the top plate, shaking of the paperboards in the transportation process is simulated, the detection accuracy is improved, unqualified products are prevented from flowing into customers, and the production efficiency is improved. And the surface of the paperboard is cleaned through a brush roller, and an adsorption mechanism is matched, so that foreign matters falling on the paperboard are prevented from influencing the detection precision, and the cleaning effect can be improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of paperboard detection, and relates to a zero-paper-powder and zero-paper-fuzz paperboard detection device based on industrial vision and a detection method thereof. BACKGROUND

[0002] Paperboard is an important material widely used in packaging, printing and other fields, and the surface quality of the paperboard directly affects the product performance and user experience. Traditional paperboard is prone to produce paper powder (fiber or filler shedding particles) and paper fuzz (loose fibers or burrs) during production, slitting and transportation. These problems may cause printing paste version, packaging machine paper jam or terminal product pollution. Therefore, it is necessary to detect the paperboard in places where the paperboard is required to be used.

[0003] The existing detection device detects by cooperating with an industrial vision system. However, the existing device can only detect the surface of the paperboard during use, and the bottom is inconvenient to detect. The detection efficiency is reduced by detecting after turning over. Therefore, the application provides a zero-paper-powder and zero-paper-fuzz paperboard detection device based on industrial vision and a detection method thereof to solve the above problems. SUMMARY

[0004] Therefore, the application provides a zero-paper-powder and zero-paper-fuzz paperboard detection device based on industrial vision and a detection method thereof to solve the above problems.

[0005] To achieve the above purpose, the application provides the following technical scheme: a zero-paper-powder and zero-paper-fuzz paperboard detection device based on industrial vision, comprising a conveying frame and a conveyor, a conveying member is arranged in the conveying frame for conveying paperboard, a bottom frame and a top frame are fixedly connected between the conveying frame and the conveyor, detection mechanisms are arranged on opposite sides of the top frame and the bottom frame for detecting the upper and lower surfaces of the paperboard, and a conveying assembly is arranged in the top frame for changing the detection surface of the paperboard. The conveying assembly comprises two sliding plates, a plurality of negative pressure rollers are rotatably connected between the two sliding plates, adjacent two negative pressure rollers are synchronously connected through synchronous wheels and synchronous belts, a plurality of air suction holes are arranged on the circumference of the negative pressure rollers, the air suction holes are irregularly arranged to keep the paperboard adsorbed and conveyed, a pull frame is fixedly connected between the two sliding plates, a gas cylinder is fixedly connected to the top of the top frame, one end of the piston rod of the gas cylinder is fixed to the pull frame, one side of one of the sliding plates is fixedly connected to a first motor, and one end of the output shaft of the first motor is fixed to one of the negative pressure rollers. The suction mechanism is arranged below the conveying frame and is used to keep the negative pressure in the negative pressure rollers.

[0006] As a further embodiment of the present invention, the conveying component includes multiple conveying rollers and a second motor. The multiple conveying rollers rotate between the two sides of the conveying frame, and multiple conveyor belts are connected to the multiple conveying rollers. The second motor is fixed to one side of the conveying frame, and one end of the output shaft of the second motor is fixed to one of the conveying rollers located at one end.

[0007] As a further embodiment of the present invention, a plurality of arc-shaped shields are fixedly connected between the two slide plates. The shields are located above the plurality of negative pressure rollers, and the periphery of the shields contacts the corresponding negative pressure rollers.

[0008] As a further embodiment of the present invention, the detection mechanism includes a bracket, which is fixed to the top inner wall of the top frame or the bottom inner wall of the bottom frame, and a camera and a fill light are fixedly connected to the side of the bracket facing the cardboard.

[0009] As a further embodiment of the present invention, the air extraction mechanism includes a negative pressure tank, a vacuum pump and multiple rotary joints. The negative pressure tank and the vacuum pump are both fixedly installed at the bottom of the conveyor frame. The air extraction end of the vacuum pump is connected to the negative pressure tank through a pipe. The top of the negative pressure tank is fixedly connected to an air extraction pipe. Multiple rotary joints are respectively rotatably installed at one end of the negative pressure roller. The multiple rotary joints and the air extraction pipe are all fixedly connected through pipes.

[0010] As a further embodiment of the present invention, the top inner wall of the conveyor frame is fixedly connected to two symmetrically arranged guide rails, and a sliding frame is slidably connected between the two guide rails. Multiple top rods are fixedly connected to the surface of the sliding frame, and a top plate is fixedly connected to the top of each top rod. One side of the top plate is inclined. A first spring is installed between the bottom of the sliding frame and the guide rail through a spring seat. Both sides of the conveyor frame are provided with driving components to drive the top plate to move up and down to simulate the vibration during cardboard transportation.

[0011] As a further embodiment of the present invention, the driving component includes an eccentric wheel, two guide blocks, and a pressure frame. The eccentric wheel is fixed to the circumference of a conveying roller located at one end. The guide blocks are all fixed to one side of the conveying frame. A through driving plate is slidably connected between the guide blocks. A plurality of evenly distributed top blocks are provided on one side of the driving plate. The pressure frame is fixed to one end of the sliding frame. A roller is rotatably connected to one side of the pressure frame and contacts the top blocks. A second spring is fixedly connected between the driving plate and one of the guide blocks. One end of the driving plate contacts the eccentric wheel.

[0012] As a further embodiment of the present invention, the top of the conveyor frame is also provided with an adsorption mechanism. The adsorption mechanism includes two drive plates fixed to the top of the conveyor frame, a dust suction hood fixedly connected between the two drive plates, a dust suction pipe fixedly connected to the top of the dust suction hood, and a dust suction box. The dust suction pipe is fixedly connected to the dust suction box, a filter screen and a collection box are inserted into the dust suction box, and a connecting pipe is fixedly installed on one side of the dust suction box. The connecting pipe is fixedly connected to a negative pressure tank.

[0013] As a further embodiment of the present invention, a processing mechanism is also provided on the top of the conveyor frame. The processing mechanism includes a brush roller and two racks. The brush roller is rotatably connected between the two sides of the upright plate. Gears are fixedly connected to both ends of the brush roller. The racks are fixed to the top of the drive plate, and the two racks mesh with the two gears respectively.

[0014] This invention also proposes a detection method for a zero-paper dust and zero-paper lint board detection device based on industrial vision, comprising the following steps: S1. Start the conveyor, the second motor, and the vacuum pump. The second motor drives the conveyor roller to rotate, which in turn drives the conveyor belt to transport the cardboard. When the cardboard enters below the top frame, a camera below the top frame takes a picture of it, which is then detected by the industrial control computer. After the cardboard surface is detected, it is conveyed to the area below the negative pressure roller. The vacuum pump creates a negative pressure inside the negative pressure tank, and the negative pressure roller can attract the cardboard through the air extraction pipe and rotary joint. With the start of the first motor, the cardboard is conveyed, exposing the bottom of the cardboard. Then, a picture is taken by the camera below, which enables a comprehensive inspection of the cardboard, improving inspection efficiency and comprehensiveness. S2. When the conveyor roller rotates, it also drives the eccentric wheel to rotate. The eccentric wheel cooperates with the second spring to make the drive plate move back and forth. The drive plate drives the top block to move. The top block pushes the pressure frame and the sliding frame, and vibrates under the action of the first spring. When the sliding frame vibrates, it drives the top rod and the top plate to vibrate, and then the top plate makes the cardboard vibrate, thereby simulating the vibration of the cardboard during transportation, improving the detection accuracy, and preventing unqualified products from entering the hands of customers. S3. When the drive plate moves, it also drives the rack to move. The rack drives the brush roller to rotate through the gear, and then the brush roller cleans the surface of the cardboard. In conjunction with the adsorption mechanism, it prevents foreign objects falling on the cardboard from affecting the accuracy of the detection. S4. Under the action of the negative pressure tank, foreign objects or powder on the cardboard can be extracted by the dust extraction hood and enter the dust extraction box through the dust extraction pipe, thereby collecting dust and improving the quality of the on-site environment.

[0015] The beneficial effects of this invention are as follows: 1. The paperboard detection equipment based on industrial vision disclosed in this invention has multiple suction holes on its circumference through the setting of a negative pressure roller, which can convey the paperboard under negative pressure and expose its bottom, making it convenient to detect the bottom and improving the comprehensiveness and accuracy of the detection. 2. The paperboard dust and lint detection equipment based on industrial vision disclosed in this invention uses an upper and lower movable top plate to make the paperboard shake, thereby simulating the shaking of the paperboard during transportation, improving detection accuracy and preventing unqualified products from entering the hands of customers. 3. The paperboard dust and lint detection device based on industrial vision disclosed in this invention, through the setting of the dust suction hood, allows foreign objects or dust on the paperboard to be extracted by the dust suction hood and enter the dust collection box through the dust suction pipe, thereby collecting dust, improving the quality of the on-site environment, and preventing foreign objects from falling on the paperboard and causing the accuracy of detection. 4. The paperboard dust and lint detection device based on industrial vision disclosed in this invention uses a brush roller to clean the surface of the paperboard and, together with an adsorption mechanism, prevents foreign objects falling on the paperboard from affecting the accuracy of the detection and improves the cleaning effect.

[0016] This invention enables the conveying of cardboard under negative pressure, exposing its bottom for easy inspection and improving the comprehensiveness and accuracy of the inspection. Simultaneously, the top plate causes the cardboard to vibrate, simulating the shaking experienced during transport, further enhancing inspection accuracy and preventing defective products from reaching customers. Furthermore, a brush roller cleans the surface of the cardboard, and an adsorption mechanism prevents foreign objects falling on the cardboard from affecting inspection accuracy and improves cleaning effectiveness.

[0017] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a first-view three-dimensional structural schematic diagram of a zero-paper dust and zero-paper lint detection device for cardboard based on industrial vision according to the present invention. Figure 2 This is a second-view three-dimensional structural diagram of a zero-paper dust and zero-paper lint detection device for cardboard based on industrial vision according to the present invention. Figure 3 This is a schematic cross-sectional view of the base frame and top frame of a zero-paper dust and zero-paper lint detection device based on industrial vision according to the present invention. Figure 4 This is a schematic diagram of the negative pressure roller structure of a zero-paper dust and zero-paper lint detection device for cardboard based on industrial vision according to the present invention. Figure 5 This is a schematic diagram of the conveyor frame structure of a zero-paper dust and zero-paper lint detection device for cardboard based on industrial vision according to the present invention; Figure 6 This invention relates to an industrial vision-based zero-paper dust and zero-paper lint detection device for cardboard. Figure 5 Schematic diagram of the second perspective structure; Figure 7 This invention relates to an industrial vision-based zero-paper dust and zero-paper lint detection device for cardboard. Figure 5 A schematic diagram of the third perspective structure; Figure 8 This is a cross-sectional view of the dust collection box of a zero-paper dust and zero-paper lint detection device for cardboard based on industrial vision according to the present invention.

[0019] Reference numerals: 1. Conveyor frame; 2. Base frame; 3. Top frame; 4. Negative pressure tank; 5. Vacuum pump; 6. Conveyor; 7. Adsorption mechanism; 8. Processing mechanism; 9. Extraction pipe; 10. Slide plate; 11. Negative pressure roller; 12. Pulling frame; 13. Cylinder; 14. First motor; 16. Shield; 17. Support; 18. Camera; 19. Fill light; 20. Second motor; 21. Suction port; 22. Rotary joint; 23. Conveyor roller 24. Conveyor belt; 25. Guide block; 26. Drive plate; 27. Guide rail; 28. First spring; 29. ​​Sliding frame; 30. Top rod; 31. Top plate; 32. Pressure frame; 33. Top block; 34. Second spring; 35. Eccentric wheel; 36. Vertical plate; 37. Dust hood; 38. Dust collection box; 39. Dust collection pipe; 40. Brush roller; 41. Gear; 42. Rack; 43. Filter screen; 44. Collection box; 45. Connecting pipe. Detailed Implementation

[0020] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0021] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings. Example

[0022] like Figures 1-8 As shown, an industrial vision-based zero-paper dust and zero-paper-wool cardboard inspection device includes a conveyor frame 1 and a conveyor 6. The conveyor 6 is used to transport the inspected cardboard, which is existing technology and will not be described in detail here. The conveyor frame 1 is equipped with a conveying component for transporting the cardboard. A base frame 2 and a top frame 3 are fixedly connected between the conveyor frame 1 and the conveyor 6. The top frame 3 and the base frame 2 are each equipped with an inspection mechanism on opposite sides for inspecting the top and bottom surfaces of the cardboard. The top frame 3 is equipped with a conveying component for changing the inspection surface of the cardboard. The conveying assembly includes two slide plates 10, with multiple through negative pressure rollers 11 rotatably connected between the two slide plates 10. Adjacent negative pressure rollers 11 are connected by a synchronous pulley and synchronous belt drive. Multiple suction holes 21 are opened on the circumference of each negative pressure roller 11. The suction holes 21 are irregularly arranged to maintain the adsorption and conveying of the cardboard. A pull frame 12 is fixedly connected between the two slide plates 10. A cylinder 13 is fixedly connected to the top of the top frame 3. One end of the piston rod of the cylinder 13 is fixed to the pull frame 12. A first motor 14 is fixedly connected to one side of one of the slide plates 10. One end of the output shaft of the first motor 14 is fixed to one of the negative pressure rollers 11. After the cardboard surface is inspected, it is conveyed to the bottom of the negative pressure roller 11. After the negative pressure roller 11 is evacuated, a negative pressure is formed inside it, which then adsorbs the cardboard. With rotation, the bottom of the cardboard can be exposed, so that the cardboard can be fully inspected. An air extraction mechanism is located below the conveyor frame 1 and is used to maintain negative pressure inside the negative pressure roller 11. Example

[0023] Reference Figures 1-8 This invention provides a new technical solution: a zero-paper dust and zero-paper wool cardboard detection device based on industrial vision.

[0024] In this invention, the conveying component includes multiple conveying rollers 23 and a second motor 20. The multiple conveying rollers 23 rotate between the two sides of the conveying frame 1. Multiple conveyor belts 24 (the conveyor belts 24 are made of conductive rubber and grounded to prevent static electricity from attracting paper dust) are connected to the multiple conveying rollers 23. The second motor 20 is fixed to one side of the conveying frame 1. One end of the output shaft of the second motor 20 is fixed to one of the conveying rollers 23 located at one end. The second motor 20 drives the conveying rollers 23 to rotate, which in turn drives the conveyor belts 24 to rotate and convey the cardboard.

[0025] In particular, multiple arc-shaped shields 16 are fixedly connected between the two slide plates 10. The shields 16 are located above the multiple negative pressure rollers 11, and the periphery of the shields 16 contacts the corresponding negative pressure rollers 11. The shields 16 can reduce the amount of air entering the negative pressure rollers 11 under the action of suction, thereby reducing energy consumption.

[0026] It should be noted that the inspection mechanism includes a bracket 17, which is fixed to the top inner wall of the top frame 3 or the bottom inner wall of the bottom frame 2. A camera 18 and a supplementary light 19 are fixedly connected to the side of the bracket 17 facing the cardboard. The camera 18 works with an industrial computer (not shown in the attached diagram) to inspect the cardboard.

[0027] In this invention, the air extraction mechanism includes a negative pressure tank 4, a vacuum pump 5, and multiple rotary joints 22. The negative pressure tank 4 and the vacuum pump 5 are both fixedly installed at the bottom of the conveyor frame 1. The air extraction end of the vacuum pump 5 is connected to the negative pressure tank 4 through a pipe. The vacuum pump 5 creates a negative pressure inside the negative pressure tank 4. The air extraction pipe 9 and the rotary joints 22 enable the negative pressure roller 11 to adsorb the cardboard. The top of the negative pressure tank 4 is fixedly connected to the air extraction pipe 9. Multiple rotary joints 22 are rotatably installed at one end of the negative pressure roller 11. The multiple rotary joints 22 and the air extraction pipe 9 are all fixedly connected through pipes. The rotary joints 22 facilitate the rotation of the negative pressure roller 11.

[0028] In particular, the top inner wall of the conveyor frame 1 is fixedly connected to two symmetrically arranged guide rails 27, and a sliding frame 29 is slidably connected between the two guide rails 27. Multiple top rods 30 are fixedly connected to the surface of the sliding frame 29, and a top plate 31 is fixedly connected to the top of each top rod 30. One side of the top plate 31 is inclined. The bottom of the sliding frame 29 and the guide rail 27 are connected by a first spring 28 through a spring seat. Both sides of the conveyor frame 1 are provided with driving components to drive the top plate 31 to move up and down to simulate the vibration during cardboard transportation. The cardboard is shaken by the top plate 31, thereby simulating the shaking of the cardboard during transportation, improving the accuracy of detection, and preventing unqualified products from entering the hands of customers.

[0029] It should be noted that the driving component includes an eccentric wheel 35, two guide blocks 25, and a pressure frame 32. The eccentric wheel 35 is fixed to the circumference of the conveyor roller 23 located at one end. The guide blocks 25 are all fixed to one side of the conveyor frame 1. A through driving plate 26 is slidably connected between the guide blocks 25. A plurality of evenly distributed top blocks 33 are provided on one side of the driving plate 26. The pressure frame 32 is fixed to one end of the sliding frame 29. A roller is rotatably connected to one side of the pressure frame 32 and contacts the top blocks 33. A second spring 34 is fixedly connected between the driving plate 26 and one of the guide blocks 25. One end of the driving plate 26 contacts the eccentric wheel 35. The rotation of the eccentric wheel 35 and the cooperation of the second spring 34 cause the driving plate 26 to reciprocate. The driving plate 26 drives the top blocks 33 to move. The top blocks 33 push the pressure frame 32 and the sliding frame 29 and vibrate under the action of the first spring 28.

[0030] In this invention, the top of the conveyor frame 1 is also provided with an adsorption mechanism 7. The adsorption mechanism 7 includes two drive plates 26 fixed to the top of the conveyor frame 1, and a dust suction hood 37 is fixedly connected between the two drive plates 26. A dust suction pipe 39 is fixedly connected to the top of the dust suction hood 37, and a dust suction box 38 is also included. The dust suction pipe 39 is fixedly connected to the dust suction box 38. A filter screen 43 and a collection box 44 are inserted into the dust suction box 38. A connecting pipe 45 is fixedly installed on one side of the dust suction box 38 and is fixedly connected to a negative pressure tank 4. Under the action of the negative pressure tank 4, foreign objects or powder on the cardboard can be drawn out by the dust suction hood 37 and enter the dust suction box 38 through the dust suction pipe 39, thereby collecting dust, improving the quality of the on-site environment, and preventing powder or other foreign objects falling from the air from falling on the cardboard and affecting the test results.

[0031] In particular, the top of the conveyor frame 1 is also equipped with a processing mechanism 8, which includes a brush roller 40 and two racks 42. The brush roller 40 is rotatably connected between the two sides of the vertical plate 36. Gears 41 are fixedly connected to both ends of the brush roller 40. The racks 42 are fixed to the top of the drive plate 26 respectively. The two racks 42 mesh with the two gears 41 respectively. When the drive plate 26 moves, it also drives the racks 42 to move. The racks 42 drive the brush roller 40 to rotate through the gears 41, thereby cleaning the surface of the cardboard through the brush roller 40. In conjunction with the adsorption mechanism 7, it prevents foreign objects falling on the cardboard from affecting the accuracy of the detection.

[0032] This invention also proposes a detection method for a zero-paper dust and zero-paper lint board detection device based on industrial vision, comprising the following steps: S1. Start the conveyor 6, the second motor 20, and the vacuum pump 5. The second motor 20 drives the conveyor roller 23 to rotate, which in turn drives the conveyor belt 24 to rotate and convey the cardboard. When the cardboard enters below the top frame 3, the camera 18 below the top frame 3 takes a picture of it, and then the picture is detected by the industrial control computer. After the cardboard surface is detected, it is conveyed to the bottom of the negative pressure roller 11. The vacuum pump 5 creates a negative pressure in the negative pressure tank 4, and the negative pressure roller 11 can attract the cardboard through the air extraction pipe 9 and the rotary joint 22. With the start of the first motor 14, the cardboard is conveyed and the bottom of the cardboard is exposed. Then the camera 18 below takes a picture, which enables a comprehensive inspection of the cardboard, improving the inspection efficiency and the comprehensiveness of the inspection. S2. When the conveyor roller 23 rotates, it also drives the eccentric wheel 35 to rotate. The eccentric wheel 35 cooperates with the second spring 34 to make the drive plate 26 reciprocate. The drive plate 26 drives the top block 33 to move. The top block 33 pushes the pressure frame 32 and the sliding frame 29, and vibrates under the action of the first spring 28. When the sliding frame 29 vibrates, it drives the top rod 30 and the top plate 31 to vibrate. Then, the top plate 31 makes the cardboard vibrate, thereby simulating the vibration of the cardboard during transportation, improving the detection accuracy, and preventing unqualified products from entering the hands of customers. S3. When the drive plate 26 moves, it also drives the rack 42 to move. The rack 42 drives the brush roller 40 to rotate through the gear 41, thereby cleaning the surface of the cardboard through the brush roller 40. In conjunction with the adsorption mechanism 7, it prevents foreign objects falling on the cardboard from affecting the accuracy of the detection. S4. Under the action of the negative pressure tank 4, foreign objects or powder on the cardboard can be extracted by the dust suction hood 37 and enter the dust suction box 38 through the dust suction pipe 39, thereby collecting dust and improving the quality of the on-site environment.

[0033] The advantages of Example 2 over Example 1 are: 1. The top plate 31 can make the cardboard shake, thereby simulating the shaking of the cardboard during transportation, improving the accuracy of detection and preventing unqualified products from entering the hands of customers; Second, the dust enters the dust collection box 38 through the suction pipe 39, thereby collecting the dust, improving the quality of the on-site environment, and preventing foreign objects from falling on the cardboard and affecting the accuracy of the detection. Third, by setting up the brush roller 40, the surface of the cardboard is cleaned by the brush roller 40, and in conjunction with the adsorption mechanism 7, foreign objects falling on the cardboard are prevented from affecting the accuracy of the detection and the cleaning effect is improved.

[0034] However, as is well known to those skilled in the art, the working principles and wiring methods of the vacuum pump 5, the first motor 14, the second motor 20, the supplementary light 19, and the camera 18 are commonplace and belong to conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A zero-paper dust and zero-paper lint paperboard detection device based on industrial vision, comprising a conveyor frame (1) and a conveyor (6), wherein the conveyor frame (1) is provided with a conveying component for conveying the paperboard, characterized in that, The conveyor frame (1) and the conveyor (6) are fixedly connected by a base frame (2) and a top frame (3). The top frame (3) and the base frame (2) are each provided with a detection mechanism on opposite sides for detecting the top and bottom surfaces of the cardboard. The top frame (3) is provided with a conveying assembly for changing the detection surface of the cardboard. The conveying assembly includes two slide plates (10), and multiple through negative pressure rollers (11) are rotatably connected between the two slide plates (10). Adjacent negative pressure rollers (11) are connected by synchronous pulleys and synchronous belts. Multiple suction holes (21) are opened on the circumference of each negative pressure roller (11). The suction holes (21) are irregularly arranged to maintain the adsorption and conveying of the cardboard. A pull frame (12) is fixedly connected between the two slide plates (10). A cylinder (13) is fixedly connected to the top of the top frame (3). One end of the piston rod of the cylinder (13) is fixed to the pull frame (12). A first motor (14) is fixedly connected to one side of one of the slide plates (10). One end of the output shaft of the first motor (14) is fixed to one of the negative pressure rollers (11). An air extraction mechanism is provided below the conveyor frame (1) to maintain negative pressure inside the negative pressure roller (11).

2. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 1, characterized in that, The conveying component includes multiple conveying rollers (23) and a second motor (20). The multiple conveying rollers (23) rotate between the two sides of the conveying frame (1). Multiple conveyor belts (24) are connected between the multiple conveying rollers (23). The second motor (20) is fixed on one side of the conveying frame (1). One end of the output shaft of the second motor (20) is fixed to one of the conveying rollers (23) located at one end.

3. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 1, characterized in that, Multiple arc-shaped shields (16) are fixedly connected between the two slide plates (10). The shields (16) are located above the multiple negative pressure rollers (11), and the periphery of the shields (16) contacts the corresponding negative pressure rollers (11).

4. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 1, characterized in that, The detection mechanism includes a bracket (17), which is fixed to the top inner wall of the top frame (3) or the bottom inner wall of the bottom frame (2). A camera (18) and a fill light (19) are fixedly connected to the side of the bracket (17) facing the cardboard.

5. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 1, characterized in that, The air extraction mechanism includes a negative pressure tank (4), a vacuum pump (5), and multiple rotary joints (22). The negative pressure tank (4) and the vacuum pump (5) are both fixedly installed at the bottom of the conveyor frame (1). The air extraction end of the vacuum pump (5) is connected to the negative pressure tank (4) through a pipe. The top of the negative pressure tank (4) is fixedly connected to an air extraction pipe (9). Multiple rotary joints (22) are respectively rotatably installed at one end of the negative pressure roller (11). The multiple rotary joints (22) and the air extraction pipe (9) are all fixedly connected through pipes.

6. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 1, characterized in that, The top inner wall of the conveyor frame (1) is fixedly connected to two symmetrically arranged guide rails (27), and a sliding frame (29) is slidably connected between the two guide rails (27). Multiple top rods (30) are fixedly connected to the surface of the sliding frame (29), and a top plate (31) is fixedly connected to the top of each top rod (30). One side of the top plate (31) is inclined. A first spring (28) is installed between the bottom of the sliding frame (29) and the guide rail (27) through a spring seat. Both sides of the conveyor frame (1) are provided with driving components to drive the top plate (31) to move up and down to simulate the vibration during cardboard transportation.

7. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 6, characterized in that, The driving component includes an eccentric wheel (35), two guide blocks (25) and a pressure frame (32). The eccentric wheel (35) is fixed on the circumference of the conveying roller (23) located at one end. The guide blocks (25) are all fixed on one side of the conveying frame (1). A through driving plate (26) is slidably connected between the guide blocks (25). A plurality of evenly distributed top blocks (33) are provided on one side of the driving plate (26). The pressure frame (32) is fixed on one end of the sliding frame (29). A roller is rotatably connected to one side of the pressure frame (32) and contacts the top block (33). A second spring (34) is fixedly connected between the driving plate (26) and one of the guide blocks (25). One end of the driving plate (26) contacts the eccentric wheel (35).

8. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 1, characterized in that, The top of the conveyor frame (1) is also provided with an adsorption mechanism (7). The adsorption mechanism (7) includes two drive plates (26) fixed on the top of the conveyor frame (1). A dust hood (37) is fixedly connected between the two drive plates (26). A dust suction pipe (39) is fixedly connected to the top of the dust hood (37). It also includes a dust collection box (38). The dust suction pipe (39) is fixedly connected to the dust collection box (38). A filter screen (43) and a collection box (44) are inserted into the dust collection box (38). A connecting pipe (45) is fixedly installed on one side of the dust collection box (38). The connecting pipe (45) is fixedly connected to the negative pressure tank (4).

9. The zero-paper dust and zero-paper lint detection equipment for cardboard based on industrial vision according to claim 8, characterized in that, The top of the conveyor frame (1) is also provided with a processing mechanism (8), which includes a brush roller (40) and two racks (42). The brush roller (40) is rotatably connected between the two sides of the upright plate (36). Both ends of the brush roller (40) are fixedly connected with gears (41). The racks (42) are respectively fixed on the top of the drive plate (26), and the two racks (42) mesh with the two gears (41) respectively.

10. A detection method for a zero-paper dust and zero-paper lint detection device based on industrial vision, as described in any one of claims 1-9, characterized in that, Includes the following steps: S1. Start the conveyor (6), the second motor (20) and the vacuum pump (5). The second motor (20) drives the conveyor roller (23) to rotate, which in turn drives the conveyor belt (24) to rotate and convey the cardboard. When the cardboard enters the area below the top frame (3), the camera (18) below the top frame (3) takes a picture of it. Then, the cardboard is detected by the industrial control computer. After the cardboard surface is detected, it is conveyed to the area below the negative pressure roller (11). The vacuum pump (5) creates a negative pressure in the negative pressure tank (4), and the negative pressure roller (11) can attract the cardboard through the air extraction pipe (9) and the rotary joint (22). With the start of the first motor (14), the cardboard is conveyed and the area below the cardboard is exposed. Then, the camera (18) below takes a picture, which enables the cardboard to be fully inspected, improving the inspection efficiency and the comprehensiveness of the inspection. S2. When the conveyor roller (23) rotates, it also drives the eccentric wheel (35) to rotate. The eccentric wheel (35) and the second spring (34) work together to make the drive plate (26) move back and forth. The drive plate (26) drives the top block (33) to move. The top block (33) pushes the pressure frame (32) and the sliding frame (29), and shakes under the action of the first spring (28). When the sliding frame (29) shakes, it drives the top rod (30) and the top plate (31) to shake. Then, the top plate (31) makes the cardboard shake, thereby simulating the shaking of the cardboard during transportation, improving the detection accuracy, and preventing unqualified products from flowing into the hands of customers. S3. When the drive plate (26) moves, it also drives the rack (42) to move. The rack (42) drives the brush roller (40) to rotate through the gear (41), and then cleans the surface of the cardboard through the brush roller (40). In conjunction with the adsorption mechanism (7), it prevents foreign objects falling on the cardboard from affecting the accuracy of the detection. S4. Under the action of the negative pressure tank (4), foreign objects or powder on the cardboard can be extracted by the dust suction hood (37) and enter the dust suction box (38) through the dust suction pipe (39), thereby collecting dust and improving the quality of the on-site environment.

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