Woven bag damage visual detection device

Abstract

The invention relates to the technical field of woven bag detection, and particularly discloses a woven bag damage visual detection device which comprises a conveying belt, sliding grooves, a tensioning cavity and a belt, the front side and the rear side of the conveying belt are each provided with a plurality of sliding grooves at equal intervals in the left-right direction, and the sliding grooves communicate with an inner cavity of the conveying belt; a tensioning cavity communicated with an inner cavity of the conveying belt is formed in the left side of the bottom end of the conveying belt, and the belt sleeves the outer wall of the conveying belt. According to the device, the color of the conveying belt is dynamically adjusted to adapt to woven bags with different colors, so that the visual detection precision and efficiency are remarkably improved, the color contrast of the woven bags and the conveying belt is improved, misjudgment is avoided, the woven bags are easier to recognize by algorithms, missing detection is reduced, meanwhile, the image processing flow is simplified, dependence on complex algorithms is reduced, and the computing power cost is saved; the problem that the detection reliability is reduced due to the fact that a traditional fixed-color conveying belt is similar to the woven bags in color is effectively solved, the device is particularly suitable for an automatic production line of the multi-color woven bags, and the stability and adaptability of product quality control are improved.

Description

Technical Field

[0001] This invention relates to the field of woven bag inspection technology, specifically to a visual inspection device for woven bag damage. Background Technology

[0002] Woven bags are packaging materials made from synthetic resins such as polypropylene and polyethylene as the main raw materials, which are extruded and stretched into flat filaments and then woven. They have the characteristics of high strength, low cost and corrosion resistance, and are widely used in the packaging of grain, fertilizer, building materials and other fields. During the production process, woven bags need to go through multiple processes such as printing, cutting and sewing. They are easily damaged due to mechanical friction or process defects. In order to ensure product quality, it is necessary to perform visual inspection of woven bags for damage. This involves using an industrial camera to capture images of woven bags moving on a conveyor belt and using image processing technology to identify surface damage. Traditional visual inspection devices for woven bag damage typically use conveyor belts of fixed colors to carry and transport the woven bags. Industrial cameras capture images, and algorithms analyze and identify damage. However, existing technology has significant drawbacks: the color of woven bags varies significantly depending on the material, purpose, and manufacturing process (e.g., white / beige for raw polypropylene, blue / green for distinguishing agricultural fertilizers, black for light blocking or recycled materials, and orange / yellow for safety warnings). Since the conveyor belt color is fixed, it's easy for the conveyor belt and woven bag to be similar or even identical in color. This low contrast leads to the following problems: firstly, the damaged area (such as holes or cracks) shows through... If the conveyor belt color is similar to that of the woven bag, it is difficult for the camera to effectively identify it, resulting in missed detections. Secondly, when the edge of the woven bag is similar in color to the background, the system is prone to misjudging the outline position, causing positioning deviations or false alarms. Finally, low contrast forces the detection algorithm to rely on complex texture analysis, increasing computational power consumption. In contrast, high-contrast combinations (such as a black conveyor belt with a white woven bag) can significantly improve detection accuracy and algorithm efficiency by highlighting outline differences and strengthening the color difference between damaged and intact areas. Therefore, there is an urgent need for a visual inspection device that can dynamically adjust the color of the conveyor belt according to the color of the woven bag to solve the detection reliability defects caused by insufficient color adaptability of existing technologies. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies in terms of low reliability in detecting woven bags with different materials, uses, and production processes, and to propose a visual inspection device for woven bag damage.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a visual inspection device for woven bag damage, comprising: a conveyor belt, a sliding groove, a tensioning cavity, a belt, a Velcro fastener, a tensioning mechanism, a positioning roller, and an adhesion mechanism. The conveyor belt has several sliding grooves equidistantly spaced along the left-right direction on both its front and rear sides, communicating with their inner cavities. A tensioning cavity communicating with its inner cavity is located on the left side of the bottom end of the conveyor belt. The belt is sleeved on the outer wall of the conveyor belt. The Velcro fastener is disposed on the outer wall of the belt. The tensioning mechanism is disposed within the inner cavity of the tensioning cavity, and the tensioning mechanism can adjust the belt tension. The front and rear ends of the positioning roller are rotatably disposed on the left side of the bottom end of the front and rear sides of the conveyor belt, respectively. The belt overlaps the outer wall of the positioning roller. The adhesion mechanism is disposed at the bottom end of the conveyor belt. The adhesion mechanism includes: a base, a roller, a first electromagnet, a nylon fabric sheet, a Velcro liner, soft rubber, an iron sheet, a guide roller, a compaction assembly, an adhesive assembly, a recycling assembly, and a drive assembly. Several bases are equidistantly positioned below the conveyor belt along a left-right direction. The bases are located to the right of the positioning roller. The front and rear ends of the roller are rotatably mounted in the center of the inner cavity of the base via damping bearings. The front end of the roller rotatably extends beyond the front side of the base. The first electromagnet is located in the center of the outer wall of the roller. The nylon fabric sheet is wound around the outer wall of the roller. The Velcro liner is pressed onto the outer side of the nylon fabric sheet. The soft rubber is pressed onto the inner side of the nylon fabric sheet. The soft rubber pressed onto the inner side of the nylon fabric sheets is of a different color. Similarly, the number of iron plates is several, and the iron plates are respectively disposed at both ends of several nylon fabric pieces. The iron plates located on the inner side of the nylon fabric pieces are magnetically attracted to the first electromagnet. The front and rear ends of the guide roller are respectively rotatably disposed at the front and rear top ends of the inner cavity of the base through bearings. The outer wall of the nylon fabric piece overlaps with the outer wall of the guide roller. The compaction component is disposed in the inner cavity of the conveyor belt. The compaction component can compact and bond the nylon fabric piece to the belt. The bonding component is disposed on the right side of the base. The bonding component can bond the nylon fabric piece to the belt. The recycling component is disposed in the inner cavity of the base. The recycling component can guide the nylon fabric piece to be recycled and wound around the outer wall of the roller. The driving component is disposed on the front side of the base. The driving component can drive the roller to rotate.

[0005] Further, the compaction assembly includes: connecting rods, a first pressure sensor, a second hydraulic cylinder, a rack, and a pressure roller. The number of connecting rods is plurality of several, with their outer walls slidably fitted into the bottom ends of the inner cavities of plurality of sliding grooves on their front and rear sides. The front and rear ends of the connecting rods slidably extend outwards from the front and rear sides of the conveyor belt. The first pressure sensor is located at the center of the bottom end of the connecting rod. The number of second hydraulic cylinders is plurality of several, with the second hydraulic cylinders equidistantly arranged at the bottom ends of the inner cavities of the conveyor belt in a left-right direction. The second hydraulic cylinder corresponds to a number of connecting rods one by one. The top of each of the second hydraulic cylinders is located at the middle of the bottom of the connecting rods. The top of the second hydraulic cylinder is in contact with the first pressure sensor. There are several racks. The tops of the racks are located at the front and rear ends of the outer wall of the connecting rods. The racks are arranged in pairs, and there are several groups. The front and rear ends of the pressure roller are rotatably located at the bottom ends of two racks in each group through bearings. The pressure roller is located below the belt. The nylon cloth is attached to the top of the outer wall of the pressure roller.

[0006] Furthermore, the compaction assembly further includes: a second rotating rod, a first gear, and a limiting plate. The number of second rotating rods is plurality of them, and the outer walls of the plurality of second rotating rods are equidistantly and rotatably disposed on the front and rear sides of the conveyor belt via bearings along the left and right directions. The front and rear ends of the second rotating rods rotatably extend outwards from the front and rear sides of the conveyor belt. The positions of the plurality of second rotating rods correspond one-to-one with the positions of the plurality of connecting rods. The number of first gears is plurality of them, and the plurality of first gears are respectively sleeved on the front and rear sides of the outer walls of the plurality of second rotating rods and locked by set screws. The plurality of first gears correspond one-to-one with the plurality of racks, and the first gear meshes with its corresponding rack. The number of limiting plates is plurality of them, and the plurality of limiting plates are equidistantly disposed on the front and rear sides of the conveyor belt along the left and right directions. The plurality of limiting plates correspond one-to-one with the plurality of racks, and the racks are located within the inner cavity of the limiting plates.

[0007] Furthermore, the bonding assembly includes: a lifting guide rod, a pressure plate, a second electromagnet, a second pressure sensor, and a third hydraulic cylinder. The lifting guide rods are of several types, with their outer walls slidably fitted to the right sides of the front and rear ends of several bases. The lifting guide rods are grouped in pairs, forming several groups. The bottom front and rear sides of the pressure plate are respectively positioned at the top ends of two lifting guide rods in each group. The second electromagnet is positioned at the top end of the pressure plate, and the nylon fabric sheet overlaps the top end of the second electromagnet. The second electromagnet and an iron sheet located outside the nylon fabric sheet are magnetically attracted. The second pressure sensor is positioned at the middle of the bottom end of the pressure plate. The third hydraulic cylinder is positioned at the rear side of the bottom end of the base, with its top end positioned at the middle of the bottom end of the pressure plate. The top end of the third hydraulic cylinder is in contact with the second pressure sensor.

[0008] Furthermore, the recycling assembly includes: a guide frame, a guide groove, and a steering roller. The guide frame is disposed in the inner cavity of the base. The front and rear sides of the guide frame are rotatably sleeved on the front and rear ends of the outer wall of the roller, respectively. The nylon fabric sheet is located in the inner cavity of the guide frame. A guide groove is provided at the top of the guide frame. The outer wall of the nylon fabric sheet is slidably fitted into the inner cavity of the guide groove. The front and rear ends of the steering roller are rotatably disposed on the left side of the bottom of the front and rear sides of the inner cavity of the guide groove via bearings. The outer wall of the nylon fabric sheet overlaps the outer wall of the steering roller.

[0009] Further, the driving assembly includes: a second gear, a third rotating rod, a sliding groove, a driven bevel gear, a sleeve, a slider, a third gear, and a push plate. The second gear is sleeved on the front side of the outer wall of the roller and locked by a set screw. The rear end of the third rotating rod is rotatably mounted on the bottom front side of the base via a bearing. The outer wall of the third rotating rod has several sliding grooves equidistantly spaced from front to back along the circumferential direction. The driven bevel gear is sleeved on the front side of the outer wall of the third rotating rod and locked by a set screw. The sleeve is slidably sleeved on the middle part of the outer wall of the third rotating rod. There are several sliders, which are equidistantly spaced in the inner cavity of the sleeve. The sliders are slidably fitted into the front side of the inner cavity of the sliding groove. The third gear is sleeved on the rear side of the outer wall of the sleeve and locked by a set screw. The third gear and the second gear are matched. The top end of the push plate is rotatably sleeved on the front side of the outer wall of the sleeve via a bearing.

[0010] Furthermore, the drive assembly also includes: a mounting bracket, a guide rod, a fourth hydraulic cylinder, a motor, a fourth rotating rod, and a drive bevel gear. The mounting bracket is located at the bottom front side of the base. The front end of the guide rod is located at the bottom rear side of the mounting bracket, and the rear end of the guide rod is located at the bottom front side of the base. The bottom end of the push plate is slidably sleeved on the outer wall of the guide rod. The fourth hydraulic cylinder is located at the top end of the mounting bracket, and the rear end of the fourth hydraulic cylinder is located at the middle front side of the push plate. The motor is screwed to the right side of the conveyor belt. The right end of the fourth rotating rod is locked to the output end of the motor via a coupling. The left end of the fourth rotating rod is rotatably located on the left side of the conveyor belt via a bearing. There are several drive bevel gears, which are equidistantly sleeved on the outer wall of the fourth rotating rod in opposite directions and locked by set screws. Each drive bevel gear meshes with a number of driven bevel gears.

[0011] Compared with the prior art, the beneficial effects of the present invention are: (1) This invention sets a male hook and loop fastener on the surface of the belt and winds a nylon cloth with a female hook and loop fastener on the roller. The top of the nylon cloth is covered with soft rubber of different colors. When the color of the conveyor belt needs to be changed, the pressure plate is used to press one end of the nylon cloth onto the conveyor belt so that the female hook and loop fastener are bonded to the male fastener. Then the conveyor belt rotates counterclockwise and the roller rotates clockwise to release the nylon cloth, so that it is flat and adhered to the surface of the conveyor belt. The bonding strength is enhanced by the pressure roller. This device can flexibly adjust the color of the conveyor belt by using replaceable colored nylon cloth to form a high contrast background with the woven bag and improve the visual inspection accuracy. (2) When changing colors, the present invention manually peels off one end of the nylon fabric piece and fixes it to the roller through a magnetic structure. The conveyor belt rotates clockwise and the roller rotates counterclockwise. The nylon fabric piece is peeled off from the conveyor belt and rewound back to the roller. At the same time, it is guided by the pressure plate, pressure roller and guide roller to ensure smooth recycling. This device combines Velcro and magnetic structure to achieve quick disassembly and assembly, improve production efficiency, and is suitable for woven bag production lines with multiple varieties and colors. (3) This device dynamically adjusts the color of the conveyor belt to adapt to woven bags of different colors, which significantly improves the accuracy and efficiency of visual inspection, increases the contrast between the color of the woven bag and the conveyor belt, can clearly distinguish the outline of the bag from the background, avoids misjudgment, and the damaged area is more easily identified by the algorithm because of the contrasting color of the conveyor belt, reducing missed detection. At the same time, it simplifies the image processing process, reduces the dependence on complex algorithms, saves computing power costs, and effectively solves the problem of decreased detection reliability caused by the traditional fixed color conveyor belt being similar to the color of the woven bag. It is especially suitable for automated production lines of multi-color woven bags, and improves the stability and adaptability of product quality control. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is an exploded view of the present invention; Figure 4 This is a schematic diagram of the tensioning mechanism; Figure 5 This is a schematic diagram of the adhesion mechanism; Figure 6 Exploded view of the adhesion mechanism; Figure 7 A schematic diagram of the structure of the guide frame during an explosion; Figure 8 This is a schematic diagram of the second gear. Figure 9 This is a schematic diagram of the third gear. Figure 10 This is a cross-sectional view of a nylon fabric sheet; Figure 11 for Figure 5 Enlarged view of point A; Figure 12 for Figure 6 Enlarged view of point B; Figure 13 for Figure 6 Enlarged view of point C; Figure 14 for Figure 6 Enlarged view of point D; Figure 15 for Figure 6 Enlarged view of point E; Figure 16 for Figure 6 Enlarged view at point F; Figure 17 for Figure 3 Enlarged view of point G.

[0014] The components represented by each number in the diagram are listed below: 1. Conveyor belt; 2. Sliding trough; 3. Tensioning chamber; 4. Belt; 5. Male Velcro patch; 6. Tensioning mechanism; 61. First rotating rod; 62. Connecting rod; 63. Tensioning roller; 64. First hydraulic cylinder; 7. Positioning roller; 8. Adhesion mechanism; 81. Base; 82. Roller; 83. First electromagnet; 84. Nylon fabric sheet; 85. Female Velcro patch; 86. Soft rubber; 87. Iron sheet; 88. Guide roller; 89. Connecting rod; 810. First pressure sensor; 811. Second hydraulic cylinder; 812. Rack; 813. Pressure roller; 814. Second rotating rod; 815. First gear; 816. Limiting plate; 817. Lifting guide rod; 818. Pressure plate; 819. Second electromagnet; 820. Second pressure sensor; 821. Third hydraulic cylinder; 822. Guide frame; 823. Guide groove; 824. Steering roller; 825. Second gear; 826. Third rotating rod; 827. Slide groove; 828. Driven bevel gear; 829. Sleeve; 830. Slider; 831. Third gear; 832. Push plate; 833. Mounting bracket; 834. Guide rod; 835. Fourth hydraulic cylinder; 836. Motor; 837. Fourth rotating rod; 838. Driving bevel gear. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0017] Reference Figure 1-17A visual inspection device for woven bag damage includes: a conveyor belt 1, a sliding groove 2, a tensioning cavity 3, a belt 4, a Velcro fastener 5, a tensioning mechanism 6, a positioning roller 7, and an adhesion mechanism 8. The conveyor belt 1 has several sliding grooves 2 equidistantly spaced along its left and right sides, communicating with its inner cavity. A tensioning cavity 3 communicating with its inner cavity is located on the left side of the bottom end of the conveyor belt 1. A visual inspection device is installed on the left side of the top end of the conveyor belt 1. This device includes an industrial camera, a light source, and an image processing system for capturing images of the woven bag and analyzing the damage condition. The conveyor belt 1 is existing technology. Without going into too much detail here, belt 4 is sleeved on the outer wall of conveyor belt 1, hook and loop fastener 5 is set on the outer wall of belt 4, tensioning mechanism 6 is set in the inner cavity of tensioning chamber 3, and tensioning mechanism 6 can be used to adjust the tension of belt 4. The front and rear ends of positioning roller 7 are rotatably set on the left side of the bottom of the front and rear sides of conveyor belt 1, respectively. Belt 4 overlaps the outer wall of positioning roller 7. Positioning roller 7 is used to guide the transmission direction of belt 4. Adhesion mechanism 8 is set at the bottom of conveyor belt 1 and is used to dynamically adjust the background color of conveyor belt 1 according to the color of woven bag to improve the accuracy and efficiency of visual inspection.

[0018] Specifically, the adhesion mechanism 8 includes: a base 81, a roller 82, a first electromagnet 83, a nylon fabric sheet 84, a Velcro 85, soft rubber 86, an iron sheet 87, a guide roller 88, a compaction assembly, an adhesive assembly, a recycling assembly, and a drive assembly. Several bases 81 are equidistantly positioned below the conveyor belt 1 along the left-right direction. The bases 81 are located to the right of the positioning roller 7 and serve as support components for the adhesion mechanism 8, providing installation space. The front and rear ends of the roller 82 are rotatably mounted in the center of the inner cavity of the base 81 via damping bearings. The front end of the roller 82 rotatably extends beyond the front side of the base 81. The roller 82 is used to wind and release the nylon fabric sheet 84. An electromagnet 83 is disposed in the middle of the outer wall of the roller 82. The first electromagnet 83 is existing technology and will not be described in detail here. The first electromagnet 83 is magnetically attracted to the iron plate 87 on the inner side of the nylon fabric sheet 84, and is used to fix one end of the nylon fabric sheet 84. The nylon fabric sheet 84 is wound around the outer wall of the roller 82. The nylon fabric sheet 84 of the corresponding color can be selected according to the color of the woven bag for spreading. The Velcro female sticker 85 is pressed on the outer side of the nylon fabric sheet 84. The Velcro female sticker 85 cooperates with the Velcro male sticker 5 on the belt 4 to realize the quick adhesion and removal of the nylon fabric sheet 84 on the belt 4. Soft rubber 86 is pressed on the inner side of the nylon fabric sheet 84. The colors of the soft rubber 86 pressed on the inner side of several nylon fabric sheets 84 are not the same. Similarly, soft rubber 86 can provide different colored backgrounds to improve the color contrast between the woven bag and the conveyor belt 1, and increase the friction between them. Several iron plates 87 are respectively positioned at both ends of several nylon fabric pieces 84. The iron plates 87 located inside the nylon fabric pieces 84 are magnetically attracted to the first electromagnet 83. The iron plates 87, the first electromagnet 83, and the second electromagnet 819 cooperate to facilitate the fixing and recycling of the nylon fabric pieces 84. The front and rear ends of the guide roller 88 are rotatably mounted on the front and rear tops of the inner cavity of the base 81 via bearings. The outer wall of the nylon fabric piece 84 overlaps the outer wall of the guide roller 88. The guide roller 88 is used to guide the transmission direction of the nylon fabric piece 84. The compaction assembly is... The compaction component, located inside the conveyor belt 1, can compact and bond the nylon fabric sheet 84 to the belt 4. The bonding component, located on the right side of the base 81, can bond the nylon fabric sheet 84 to the belt 4. The bonding component is used to bond one end of the nylon fabric sheet 84 to the belt 4. The recycling component, located inside the base 81, can guide the nylon fabric sheet 84 to be recycled and wound around the outer wall of the roller 82. The recycling component is used to guide the nylon fabric sheet 84 to be recycled and wound around the outer wall of the roller 82. The drive component, located at the front of the base 81, can drive the roller 82 to rotate.

[0019] The compaction assembly includes: connecting rods 89, a first pressure sensor 810, a second hydraulic cylinder 811, a rack 812, a pressure roller 813, a second rotating rod 814, a first gear 815, and a limiting plate 816. There are several connecting rods 89, and their outer walls are slidably fitted into the bottom of several sliding grooves 2. The front and rear ends of the connecting rods 89 extend slidably from the front and rear sides of the conveyor belt 1. The first pressure sensor 810 is located at the middle of the bottom end of the connecting rod 89 and is used to detect the thrust applied by the second hydraulic cylinder 811 to the connecting rod 89. There are several second hydraulic cylinders 811. Cylinders 811 are equidistantly arranged at the bottom of the inner cavity of the conveyor belt 1 along the left and right directions. Several second hydraulic cylinders 811 correspond one-to-one with several connecting rods 89. The tops of the second hydraulic cylinders 811 are respectively located at the middle of the bottom of the connecting rods 89. The tops of the second hydraulic cylinders 811 are in contact with the first pressure sensor 810. The second hydraulic cylinders 811 are used to push the connecting rods 89 up and down. Several racks 812 are present, with their tops located at the front and rear ends of the outer wall of the connecting rods 89. The racks 812 are arranged in pairs, forming several groups. The racks 812 are used to drive the pressure roller 813 up and down. The front and rear ends of the pressure roller 813 are connected by bearings. The bottom ends of the two racks 812 in each group are rotatably mounted. The pressure roller 813 is located below the belt 4. The nylon fabric sheet 84 overlaps the top of the outer wall of the pressure roller 813. The pressure roller 813 is used to compact the nylon fabric sheet 84. There are several second rotating rods 814. The outer walls of the several second rotating rods 814 are equidistantly mounted on the front and rear sides of the conveyor belt 1 through bearings along the left and right directions. The front and rear ends of the second rotating rods 814 extend rotatably out of the front and rear sides of the conveyor belt 1. The positions of the several second rotating rods 814 correspond one-to-one with the positions of several connecting rods 89. There are several first gears 815. The several first gears 815 are respectively sleeved on the several second rotating rods 814. The outer walls of the rotating rod 814 are locked with set screws on both the front and rear sides. Several first gears 815 and several racks 812 are corresponding one-to-one. The first gear 815 and its corresponding rack 812 mesh with each other. The cooperation between the first gear 815, the second rotating rod 814 and the rack 812 can ensure that the front and rear ends of the pressure roller 813 move synchronously. There are several limiting plates 816. Several limiting plates 816 are equidistantly arranged on the front and rear sides of the conveyor belt 1 in the left and right directions. Several limiting plates 816 and several racks 812 are corresponding one-to-one. The racks 812 are located in the inner cavity of the limiting plates 816. The limiting plates 816 are used to limit the movement range of the racks 812 and ensure the stable movement of the pressure roller 813.

[0020] The bonding assembly includes: lifting guide rods 817, pressure plate 818, second electromagnet 819, second pressure sensor 820, and third hydraulic cylinder 821. There are several lifting guide rods 817, whose outer walls are slidably fitted to the front and rear right sides of several bases 81. The lifting guide rods 817 are grouped in pairs. The bottom front and rear sides of the pressure plate 818 are respectively positioned at the top of two lifting guide rods 817 in each group. The pressure plate 818 is used to drive the second electromagnet 819 to move up and down. The second electromagnet 819 is positioned at the top of the pressure plate 818. A nylon fabric sheet 84 overlaps the top of the second electromagnet 819. The second electromagnet 819 and the nylon fabric sheet 821 are connected to the top of the second electromagnet 819. The iron sheet 87 on the outer side of the nylon fabric 84 is magnetically attracted. The second electromagnet 819 is existing technology and will not be described in detail here. The second electromagnet 819 is magnetically attracted to the iron sheet 87 on the outer side of the nylon fabric 84 and is used to fix one end of the nylon fabric 84. The second pressure sensor 820 is located at the bottom center of the pressure plate 818. The second pressure sensor 820 is used to detect the squeezing force applied to the pressure plate 818 by the third hydraulic cylinder 821. The third hydraulic cylinder 821 is located at the bottom rear side of the base 81. The top of the third hydraulic cylinder 821 is located at the bottom center of the pressure plate 818. The top of the third hydraulic cylinder 821 is in contact with the second pressure sensor 820. The third hydraulic cylinder 821 is used to push the pressure plate 818 to move up and down.

[0021] The recycling assembly includes a guide frame 822, a guide groove 823, and a guide roller 824. The guide frame 822 is disposed in the inner cavity of the base 81. The front and rear sides of the guide frame 822 are rotatably sleeved on the front and rear ends of the outer wall of the roller 82, respectively. A nylon fabric sheet 84 is located in the inner cavity of the guide frame 822. The top of the guide frame 822 has a guide groove 823. The outer wall of the nylon fabric sheet 84 is slidably fitted into the inner cavity of the guide groove 823. The front and rear ends of the guide roller 824 are rotatably disposed on the left side of the bottom of the front and rear sides of the inner cavity of the guide groove 823 via bearings. The outer wall of the nylon fabric sheet 84 overlaps the outer wall of the guide roller 824. The guide roller 824 is used to guide the recycling direction of the nylon fabric sheet 84.

[0022] The drive assembly includes: a second gear 825, a third rotating rod 826, a slide 827, a driven bevel gear 828, a sleeve 829, a slider 830, a third gear 831, a push plate 832, a mounting bracket 833, a guide rod 834, a fourth hydraulic cylinder 835, a motor 836, a fourth rotating rod 837, and a driving bevel gear 838. The second gear 825 is sleeved on the front side of the outer wall of the roller 82 and locked by a set screw. The second gear 825 is used to transmit power. The rear end of the third rotating rod 826 is rotatably mounted on the bottom front side of the base 81 via a bearing. The outer wall of the third rotating rod 826 is equidistantly spaced from front to back along the circumferential direction. The sleeve 826 has several grooves 827. A driven bevel gear 828 is sleeved on the front side of the outer wall of the third rotating rod 826 and locked by a set screw. The driven bevel gear 828 is used to receive and transmit power. A sleeve 829 is slidably sleeved on the middle part of the outer wall of the third rotating rod 826. There are several sliders 830, which are equidistantly arranged in the inner cavity of the sleeve 829 along the circumference. The sliders 830 are slidably fitted into the front side of the inner cavity of the groove 827. The axial movement of the sleeve 829 can be realized by the cooperation between the sliders 830 and the grooves 827. The third gear 831 is sleeved on the outer wall of the sleeve 829. The rear side is locked with a set screw. The third gear 831 matches the second gear 825. The top of the push plate 832 is rotatably sleeved on the front side of the outer wall of the sleeve 829 via a bearing. The mounting bracket 833 is located at the bottom front side of the base 81. The front end of the guide rod 834 is located at the bottom rear side of the mounting bracket 833, and the rear end of the guide rod 834 is located at the bottom front side of the base 81. The bottom end of the push plate 832 is slidably sleeved on the outer wall of the guide rod 834. The fourth hydraulic cylinder 835 is located at the top of the mounting bracket 833, and the rear end of the fourth hydraulic cylinder 835 is located at the middle front side of the push plate 832. The motor 836 is screwed to the conveyor belt 1. On the right side, motor 826 is existing technology and will not be described in detail here. Motor 836 is a servo motor, which is connected to a servo controller and is used to provide power. The right end of the fourth rotating rod 837 is locked to the output end of motor 836 through a coupling. The left end of the fourth rotating rod 837 is rotatably set on the left side of conveyor belt 1 through a bearing. There are several driving bevel gears 838. The driving bevel gears 838 are respectively sleeved on the outer wall of the fourth rotating rod 837 at equal intervals in opposite directions and locked by set screws. The driving bevel gears 838 mesh with several driven bevel gears 828 respectively.

[0023] Specifically, the tensioning mechanism 6 includes: a first rotating rod 61, a connecting rod 62, a tensioning roller 63, and a first hydraulic cylinder 64. The first rotating rod 61 is rotatably mounted on the left side of the conveyor belt 1 via bearings. The front and rear ends of the first rotating rod 61 extend rotatably out of the front and rear sides of the conveyor belt 1, respectively. There are two connecting rods 62, one end of which is fixedly mounted on the front and rear ends of the first rotating rod 61, respectively. The front and rear ends of the tensioning roller 63 are rotatably mounted on the other ends of the two connecting rods 62 via bearings, respectively. The tensioning roller 63 is located in the inner cavity of the tensioning chamber 3. The top end of the first hydraulic cylinder 64 is rotatably mounted on the top end of the inner cavity of the conveyor belt 1 via a pin, and the bottom end of the first hydraulic cylinder 64 is rotatably mounted on the middle part of the first rotating rod 61 via a pin.

[0024] In this invention, in step one, when in use, the first hydraulic cylinder 64 is started, and the first hydraulic cylinder 64 pushes the first rotating rod 61 to drive the connecting rod 62 to rotate clockwise around the first rotating rod 61. Thus, the connecting rod 62 can drive the tension roller 63 to swing clockwise. The clockwise swing of the tension roller 63 can increase the tension of the belt 4 until the belt 4 reaches a suitable tension. Step 2: Based on the color of the woven bag to be visually inspected for damage, select the color of the soft rubber 86 to be pressed onto the nylon fabric piece 84. Activate the corresponding third hydraulic cylinder 821. The third hydraulic cylinder 821 pushes the second electromagnet 819 upward through the pressure plate 818. The magnetic force between the second electromagnet 819 and the iron plate 87 drives one end of the nylon fabric piece 84 upward until the female Velcro patch 85 pressed onto the nylon fabric piece 84 and the male Velcro patch 5 on the belt 4 come into contact. Under the pressure of the plate 818, one end of the nylon cloth 84 can be glued to the belt 4 through the cooperation between the hook and loop fastener female 85 and the hook and loop fastener male 5. The pressure applied to the pressure plate 818 by the third hydraulic cylinder 821 is detected by the second pressure sensor 820 until the appropriate pressure is reached to prevent the belt 4 from being damaged due to excessive pressure. The second electromagnet 819 is turned off and the magnetism of the second electromagnet 819 disappears. Then the third hydraulic cylinder 821 can drive the pressure plate 818 to move downward to the initial position. Step 3: Start the second hydraulic cylinder 811. The second hydraulic cylinder 811 can push the connecting rod 89 upward to drive the rack 812 upward. The rack 812 can then drive the pressure roller 813 upward. The cooperation between the second rotating rod 814 and the first gear 815 can ensure that the two racks 812 move upward synchronously, thus ensuring that the front and rear ends of the pressure roller 813 are horizontal until the pressure roller 813 contacts the nylon cloth 84 bonded to the outer wall of the belt 4. The first pressure sensor 810 detects the push applied by the second hydraulic cylinder 811 to the connecting rod 89, thus determining the squeezing force applied by the pressure roller 813 to the nylon cloth 84, until the first pressure sensor 810 detects an appropriate value. Step 4: Activate the fourth hydraulic cylinder 835 corresponding to the nylon fabric piece 84. The fourth hydraulic cylinder 835 pushes the push plate 832, causing the sleeve 829 to move backward. This allows the sleeve 829 to drive the third gear 831 backward, simultaneously causing the slider 830 to slide backward along the inner cavity of the groove 827 until the third gear 831 and the second gear 825 mesh. Start the conveyor belt 1, driving the belt 4 to move counter-clockwise. Simultaneously, start the motor 836. The output end of the motor 836 drives the driving bevel gear 838 to rotate via the fourth rotating rod 837. This allows the driving bevel gear 838 to drive the driven bevel gear 838... 28 drives the third rotating rod 826 to rotate counterclockwise. The counterclockwise rotation of the third rotating rod 826 can drive the third gear 831 to rotate counterclockwise through the cooperation between the slide groove 827, the slider 830 and the sleeve 829. Thus, the cooperation between the third gear 831 and the second gear 825 can drive the roller 82 to rotate clockwise. At this time, the belt 4 moves counterclockwise in a circumferential direction. The roller 82 rotates clockwise, so that the nylon cloth 84 wrapped on the outer wall of the roller 82 can be gradually adhered to the outer wall of the belt 4 and pressed by the pressure roller 813. Thus, the woven bag can be placed on the soft rubber 86 pressed by the nylon cloth 84 for visual inspection. Step 5: When it is necessary to replace the nylon fabric piece 84 bonded to the belt 4, manually peel off one end of the nylon fabric piece 84 bonded to the belt 4, activate the first electromagnet 83, and overlap one end of the peeled nylon fabric piece 84 onto the outer wall of the roller 82. This causes the outer wall of the nylon fabric piece 84 to overlap the outer walls of the second electromagnet 819, the pressure roller 813, and the guide roller 88, respectively. Furthermore, the outer wall of the nylon fabric piece 84 is forced through the inner cavity of the guide groove 823 and overlaps the outer wall of the steering roller 824. The magnetic force between the first electromagnet 83 and the iron sheet 87 can be used to attract one end of the nylon cloth 84 to the outer wall of the roller 82. The motor 836 is started, and the motor 836 drives the roller 82 to rotate counterclockwise through the second gear 825. The conveyor belt 1 drives the belt 4 to rotate clockwise, so that the nylon cloth 84 adhered to the belt 4 can be wound around the outer wall of the roller 82 again. The above actions can be repeated to replace the nylon cloth 84 adhered to the belt 4.

[0025] This device dynamically adjusts the color of conveyor belt 1 to adapt to woven bags of different colors, significantly improving the accuracy and efficiency of visual inspection. It enhances the contrast between the woven bag and conveyor belt 1 colors, clearly distinguishing the bag outline from the background and avoiding misjudgments. Damaged areas are more easily identified by the algorithm due to the contrasting color of conveyor belt 1, reducing missed detections. At the same time, it simplifies the image processing flow, reduces reliance on complex algorithms, and saves computing power costs. It effectively solves the problem of decreased detection reliability caused by traditional fixed-color conveyor belts being similar in color to woven bags. It is especially suitable for automated production lines of multi-color woven bags, improving the stability and adaptability of product quality control.

[0026] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A visual inspection device for woven bag damage, characterized in that, include: The conveyor belt (1) has several sliding grooves (2) that are equidistant from each other in the left and right directions on both the front and rear sides of the conveyor belt (1) and are connected to its inner cavity. The bottom left side of the conveyor belt (1) has a tensioning cavity (3) that is connected to its inner cavity. A belt (4) is fitted onto the outer wall of the conveyor belt (1); Hook and loop fastener (5), the hook and loop fastener (5) is disposed on the outer wall of the belt (4); Tensioning mechanism (6) is provided in the inner cavity of tensioning chamber (3), and the tension of belt (4) can be adjusted by means of tensioning mechanism (6); The positioning roller (7) is rotatably disposed at the bottom left of the front and rear sides of the conveyor belt (1), and the belt (4) overlaps the outer wall of the positioning roller (7). An adhesion mechanism (8) is disposed at the bottom end of the conveyor belt (1).

2. The visual inspection device for woven bag damage according to claim 1, characterized in that: The adhesion mechanism (8) includes: The base (81) is a plurality of bases (81), and the plurality of bases (81) are arranged equidistantly in the left and right directions below the conveyor belt (1), and the bases (81) are located to the right of the positioning roller (7). The front and rear ends of the roller (82) are rotatably disposed in the middle of the inner cavity of the base (81) via damping bearings, and the front end of the roller (82) extends rotatably out of the front side of the base (81). The first electromagnet (83) is disposed in the middle of the outer wall of the roller (82); Nylon fabric sheet (84), said nylon fabric sheet (84) is wound around the outer wall of the roller (82); Hook and loop fastener (85), said hook and loop fastener (85) is pressed onto the outside of nylon fabric sheet (84); Soft rubber (86) is pressed onto the inside of a nylon fabric sheet (84), and the colors of the soft rubber (86) pressed onto the inside of several nylon fabric sheets (84) are all different. Iron sheet (87), the number of iron sheets (87) is several, the several iron sheets (87) are respectively disposed at both ends of several nylon cloth sheets (84), the iron sheet (87) located inside the nylon cloth sheet (84) is magnetically attracted to the first electromagnet (83); The guide roller (88) is rotatably mounted on the front and rear ends of the inner cavity of the base (81) via bearings at its front and rear ends respectively. The outer wall of the nylon cloth sheet (84) overlaps the outer wall of the guide roller (88). A compaction assembly is disposed in the inner cavity of the conveyor belt (1) and is capable of compacting and bonding the nylon fabric sheet (84) to the belt (4); An adhesive assembly is provided on the right side of the base (81) and is capable of bonding a nylon fabric sheet (84) to a belt (4); A recycling assembly is disposed in the inner cavity of the base (81) and is capable of guiding the nylon fabric sheet (84) to be recycled and wound around the outer wall of the roller (82); A drive assembly is disposed on the front side of the base (81) and is capable of driving the roller (82) to rotate.

3. The visual inspection device for woven bag damage according to claim 2, characterized in that: The compaction component includes: Connecting rod (89), the number of connecting rods (89) is several, the outer walls of several connecting rods (89) are slidably adapted to be inserted into the bottom of the inner cavity of several sliding grooves (2), and the front and rear ends of the connecting rods (89) are slidably extended out of the front and rear sides of the conveyor belt (1). The first pressure sensor (810) is located at the middle of the bottom end of the connecting rod (89); The second hydraulic cylinder (811) has a number of cylinders. The cylinders are equidistantly arranged at the bottom of the inner cavity of the conveyor belt (1) in the left and right directions. The cylinders correspond one-to-one with the connecting rods (89). The top of the cylinders is located at the middle of the bottom of the connecting rods (89). The top of the cylinders is in contact with the first pressure sensor (810). Rack (812), the number of racks (812) is several, the top ends of several racks (812) are respectively disposed at the front and rear ends of the outer wall of several connecting rods (89), and several racks (812) are in pairs; The pressure roller (813) is rotatably mounted at the bottom of two racks (812) in each group via bearings at its front and rear ends. The pressure roller (813) is located below the belt (4). The nylon cloth sheet (84) overlaps the top of the outer wall of the pressure roller (813).

4. The visual inspection device for woven bag damage according to claim 3, characterized in that: The compaction assembly also includes: The second rotating rod (814) has a number of them. The outer walls of the second rotating rod (814) are equidistantly and rotatably arranged on the front and rear sides of the conveyor belt (1) along the left and right directions through bearings. The front and rear ends of the second rotating rod (814) extend rotatably out of the front and rear sides of the conveyor belt (1). The positions of the second rotating rod (814) correspond one-to-one with the positions of the connecting rods (89). The first gear (815) is a plurality of the first gears (815). The plurality of first gears (815) are respectively sleeved on the front and rear sides of the outer wall of the plurality of second rotating rods (814) and locked by set screws. The plurality of first gears (815) and the plurality of racks (812) correspond one to one. The first gear (815) and its corresponding rack (812) mesh with each other. The limiting plate (816) is a plurality of such limiting plates (816). The plurality of such limiting plates (816) are equidistantly arranged on the front and rear sides of the conveyor belt (1) in the left and right directions. The plurality of such limiting plates (816) correspond one-to-one with the plurality of toothed racks (812). The toothed racks (812) are located in the inner cavity of the limiting plate (816).

5. The visual inspection device for woven bag damage according to claim 4, characterized in that: The adhesive assembly includes: The lifting guide rod (817) is a plurality of such rods. The outer walls of the plurality of lifting guide rods (817) are respectively slidably adapted to each other and disposed on the right side of the front and rear ends of the plurality of bases (81). The plurality of lifting guide rods (817) are divided into several groups of two to one. Pressure plate (818), the bottom end of which is located on the front and rear sides of the two lifting guide rods (817) in each group respectively; The second electromagnet (819) is disposed at the top of the pressure plate (818), the nylon cloth sheet (84) overlaps the top of the second electromagnet (819), and the second electromagnet (819) and the iron sheet (87) located outside the nylon cloth sheet (84) are magnetically attracted to each other. The second pressure sensor (820) is located at the bottom center of the pressure plate (818); The third hydraulic cylinder (821) is located at the rear of the bottom end of the base (81), and the top end of the third hydraulic cylinder (821) is located at the middle of the bottom end of the pressure plate (818). The top end of the third hydraulic cylinder (821) is in contact with the second pressure sensor (820).

6. The visual inspection device for woven bag damage according to claim 5, characterized in that: The recycling component includes: A guide frame (822) is disposed in the inner cavity of the base (81). The front and rear sides of the guide frame (822) are rotatably sleeved on the front and rear ends of the outer wall of the roller (82). The nylon fabric piece (84) is located in the inner cavity of the guide frame (822). A guide groove (823) is provided at the top of the guide frame (822). The outer wall of the nylon fabric piece (84) is slidably fitted into the inner cavity of the guide groove (823). The front and rear ends of the steering roller (824) are rotatably disposed on the left side of the bottom of the front and rear sides of the inner cavity of the guide groove (823) via bearings, and the outer wall of the nylon cloth sheet (84) overlaps the outer wall of the steering roller (824).

7. The visual inspection device for woven bag damage according to claim 6, characterized in that: The driving component includes: The second gear (825) is sleeved on the front side of the outer wall of the winding roller (82) and locked by the set screw; The third rotating rod (826) is rotatably mounted on the front bottom of the base (81) via a bearing. The outer wall of the third rotating rod (826) is provided with several sliding grooves (827) equidistantly spaced from front to back along the circumferential direction. Driven bevel gear (828), which is sleeved on the front side of the outer wall of the third rotating rod (826) and locked by a set screw; Sleeve (829), which is slidably sleeved on the middle of the outer wall of the third rotating rod (826); The slider (830) is a plurality of sliders (830), and the plurality of sliders (830) are respectively arranged equidistantly in the inner cavity of the sleeve (829) along the circumferential direction. The sliders (830) are slidably adapted to be inserted into the front side of the inner cavity of the slide groove (827). The third gear (831) is sleeved on the rear side of the outer wall of the sleeve (829) and locked by a set screw. The third gear (831) matches the second gear (825). Push plate (832), the top end of which is rotatably sleeved on the front side of the outer wall of sleeve (829) via bearing.

8. The visual inspection device for woven bag damage according to claim 7, characterized in that: The driving component also includes: Mounting bracket (833), said mounting bracket (833) is disposed at the front bottom end of the base (81); The guide rod (834) has its front end located at the rear bottom of the mounting bracket (833), and its rear end located at the front bottom of the base (81). The bottom end of the push plate (832) is slidably sleeved on the outer wall of the guide rod (834). The fourth hydraulic cylinder (835) is located at the top of the mounting bracket (833), and the rear end of the fourth hydraulic cylinder (835) is located at the front middle of the push plate (832). Motor (836), said motor (836) is screwed to the right side of conveyor belt (1); The right end of the fourth rotating rod (837) is locked to the output end of the motor (836) by a coupling, and the left end of the fourth rotating rod (837) is rotatably set on the left side of the conveyor belt (1) by a bearing; The active bevel gear (838) is a plurality of such active bevel gears (838), which are respectively sleeved on the outer wall of the fourth rotating rod (837) at equal intervals in opposite directions along the left and right sides and locked by set screws. The plurality of active bevel gears (838) mesh with a plurality of driven bevel gears (828).

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