Visual inspection equipment for cloth printing and dyeing flaws

Abstract

The invention relates to cloth printing and dyeing defect visual detection equipment, and belongs to the technical field of cloth detection. The invention aims to solve the problems of poor shooting effect and low detection precision in a detection box caused by difficulty in detecting the head end and the tail end of cloth and easiness in loosening, wrinkling or deviation during transmission in the conventional equipment. The equipment comprises a rack, a detection box, a winding roller, a driving roller, a motor II, a driving mechanism and a pulling mechanism. A plurality of guide rollers are arranged on the rack and are used for guiding cloth to move; the detection box is fixed at the top of the rack and is internally provided with a camera and a light supplementing lamp which are arranged at an angle of 45 degrees and can clearly shoot the front and back surfaces of the cloth; the winding roller is matched with the driving roller through the driving mechanism, cloth winding is achieved under driving of the motor II, the driving mechanism can adjust the position of the winding roller according to the winding diameter, the equipment stably pulls the cloth through the pulling mechanism and flattens the cloth in cooperation with a pressing wheel of the leveling assembly, the detection precision is effectively improved, and the device is suitable for flaw detection work after printing and dyeing of various kinds of cloth.

Description

Technical Field

[0001] This invention belongs to the field of fabric inspection technology and relates to a visual inspection device for fabric printing and dyeing defects. Background Technology

[0002] In the nonwoven fabric printing and dyeing process, due to factors such as raw material quality, fluctuations in printing and dyeing process parameters, and equipment operating status, various defects such as spots, color differences, scratches, and missing patterns are prone to appear on the fabric surface. These defects not only affect the appearance quality of the fabric, but may also reduce the performance of the fabric, thereby affecting the quality of downstream products and causing economic losses to the production enterprise. Therefore, defect detection of printed and dyed fabric is an important part of ensuring product quality. To improve inspection efficiency and accuracy, some companies have begun to adopt automated inspection equipment. Existing automated inspection equipment typically includes a fabric conveying mechanism and a vision inspection system. The conveying mechanism moves the fabric, a camera photographs the fabric, and image processing technology identifies defects. However, these devices still have some shortcomings in practical applications. The conveying mechanism of existing equipment mostly uses a single roller drive, relying solely on the friction between the roller and the fabric to move the fabric. However, the beginning and end of the fabric still need to be manually passed through the inspection box, making it difficult to inspect the beginning and end of the fabric. At the same time, during the fabric conveying process, especially at the beginning and end stages, the fabric is prone to loosening, wrinkling, or shifting, causing the fabric to move unstably within the inspection box, which seriously affects the imaging effect and inspection accuracy of the vision inspection system.

[0003] Therefore, we propose a visual inspection device for fabric printing and dyeing defects to solve the problems mentioned above. Summary of the Invention

[0004] In view of this, in order to solve the above problems, the present invention provides a visual inspection device for fabric printing and dyeing defects.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a visual inspection device for fabric printing and dyeing defects, comprising: A frame, on which multiple guide rollers are provided for guiding the movement of the fabric; The detection box is fixedly installed on the top of the frame. Inside the detection box are two cameras for capturing images of the moving fabric surface and a supplementary light for illuminating the image acquisition. The take-up roller is movably disposed within the frame; The drive roller is rotatably mounted inside the frame; Motor II is fixedly installed on one side of the frame, and its output end is connected to the drive roller. A drive mechanism, mounted on the frame, is used to drive the take-up roller to move toward and abut against the drive roller, and to drive the take-up roller to rotate by the friction between the drive roller and the take-up roller to take up the fabric. A pulling mechanism, located at the top of the frame, is used to clamp and pull the first or last end of the fabric smoothly through the detection area below the detection box. The outer wall of the take-up roller is provided with a slot, and the pulling mechanism also includes a pushing component for pushing and fixing the end of the fabric that has been clamped by it into the slot.

[0006] As a further improvement to the above technical solution: The drive mechanism includes: The support shaft is fixedly installed inside the frame; Two swing frames are rotatably mounted on the outer wall of the support shaft, and the take-up roller is supported on the two swing frames; Two electric push rods, the cylinder ends of which are hinged to one side of the detection box, and the output ends of which are respectively hinged to the corresponding swing frame; By controlling the extension and retraction of the electric push rod, the swing frame is driven to swing around the support shaft, thereby moving the take-up roller closer to or away from the drive roller. During the winding process, the position of the take-up roller is adjusted according to the change in the fabric roll diameter, so that the fabric always remains in contact with the drive roller.

[0007] The pulling mechanism includes: Two guide rails are fixedly installed in parallel on the top of the frame; The slider slides in conjunction with the guide rail. A screw is rotatably disposed within one of the guide rails, and a nut ring is provided at the bottom of the slider to form a ball screw pair with the screw; A connecting shaft is rotatably disposed between the two guide rails, and one end of it is connected to the screw drive. Motor I is fixedly installed inside the frame, and its output end is connected to the connecting shaft via a synchronous belt drive mechanism. The movable stage is fixedly mounted on the two sliders and moves along the guide rail with the sliders. A fixing component, installed on the moving platform, is used to fix one end of the fabric to the moving platform during fabric traction.

[0008] The fixing component includes: Two mounting brackets are fixedly installed on the top of the mobile platform; Cylinder I is fixedly installed on one side of each of the aforementioned mounting brackets; The pressure plate has its two ends connected to the output ends of the two cylinders I, respectively. A heating plate is embedded in the top surface of the moving platform; The welding rod can be placed on the movable platform and positioned above the heating plate; The pressure plate is pressed down by the cylinder I, which presses the fabric laid between the welding strip and the heating plate together, and the fabric is heated by the heating plate to melt and adhere to the welding strip to achieve fixation.

[0009] The push component includes: Two positioning frames are fixedly installed on the top of the moving platform, and the welding strip is located between the two positioning frames; Two cylinders II are fixedly installed on the top of the moving platform; A pusher block is fixedly installed at the output end of each cylinder II and can push the welding strip through the side wall of the positioning frame; A positioning platform is fixedly installed on the top of the frame and flush with the end of the moving track of the moving platform. A guide groove is provided inside the positioning platform. When the moving platform moves to contact the positioning platform, the cylinder II drives the pusher to move, pushing the end of the fabric with the welding strip into the slot of the take-up roller through the guide groove.

[0010] Two positioning blocks are fixedly installed on the inner side of the frame. The top of the positioning blocks is provided with positioning grooves. Limiting blocks are fixedly installed at both ends of the take-up roller. The shape of the limiting blocks is adapted to the positioning grooves. When the take-up roller is placed on the swing frame, the limiting block is embedded in the positioning groove to circumferentially position the take-up roller and ensure that the slot on it is aligned with the guide groove.

[0011] It also includes a leveling component, the leveling component comprising: Two sets of mounting brackets are fixedly installed on the top of the pressure plate; A pivot shaft is rotatably mounted on each of the aforementioned mounting brackets; The swing arm is fixedly sleeved on the outer wall of the rotating shaft; A sliding rod is slidably disposed within the swing rod; The pressure roller is rotatably mounted on the bottom end of the sliding rod; A spring is sleeved on the outside of the rotating shaft, with its inner end connected to the rotating shaft and its outer end connected to the cover plate fixed to the mounting bracket; The two sets of swing rods are respectively tilted outwards in opposite directions; Under the torque of the spring, the pressure roller is given pressure toward the fabric and contacts the fabric before the pressure plate during the pressing process. It uses its inclined layout to spread the fabric outward to achieve flattening. The sliding rod can adapt to changes in fabric thickness.

[0012] Two cylinders III are also fixedly installed on the frame, and a pressure roller is rotatably mounted on the output end of the two cylinders III. By controlling the extension and retraction of the cylinder III, the pressure roller is driven to press down or lift up, thereby tensioning or relaxing the fabric passing underneath it.

[0013] The slot is provided with a first magnetic element, and the welding strip is provided with a second magnetic element that is attracted to the first magnetic element. When the pushing component pushes the end of the fabric with the welding strip into the slot, the welding strip is fixed in the slot by the attraction between the first magnetic component and the second magnetic component.

[0014] The two cameras are arranged symmetrically inside the detection box, with their optical axes forming a 45° angle with the fabric surface. The fill light is a strip LED light and is set to correspond to the shooting area of ​​the camera.

[0015] The beneficial effects of this invention are as follows: 1. The fabric printing and dyeing defect visual inspection device disclosed in this invention, through the combination design of dual cameras and supplementary lights in the inspection box, can perform multi-angle imaging for fabrics with different printing and dyeing processes, effectively eliminate the blind spots caused by light interference, improve the accuracy of defect identification, and the fabric transmission system composed of guide rollers and pressure rollers can adjust the fabric tension in real time through the pressure roller driven by cylinder III to avoid image distortion caused by the fabric being too loose or too tight, and ensure the reliability of the inspection data; 2. The fabric printing and dyeing defect visual inspection device disclosed in this invention drives the swing frame to move the take-up roller through the electric push rod. With the friction transmission of the drive roller, the spacing can be automatically adjusted according to the change of fabric roll diameter, so that the take-up roller maintains a constant linear speed when the fabric thickness increases, preventing fabric stretching or wrinkling caused by speed difference, while ensuring stable tension during the winding process and reducing the defect rate. 3. The fabric printing and dyeing defect visual inspection device disclosed in this invention achieves non-destructive fixation of the fabric through hot melt welding technology. The cooperation of the heating plate and the welding strip melts and bonds the ends of the fabric, avoiding the indentations or deformation caused by traditional clamps. At the same time, the moving table driven by motor I can smoothly transport the first and last ends of the fabric, so that the fabric can be completely inspected. The pushing component composed of the positioning frame and the push block can accurately insert the welded ends of the fabric into the take-up roller slot. The cooperation of the positioning block and the limiting block further ensures the accuracy of the insertion position. The whole process does not require manual intervention, which significantly improves the operating efficiency. 4. The fabric printing and dyeing defect visual inspection device disclosed in this invention uses a spring-driven swing rod structure to keep the pressure roller always pressing on the fabric. The sliding rod design allows the pressure roller to automatically adjust its height according to the undulation of the fabric surface. The two sets of outward-inclined swing rods form a progressive leveling effect, effectively eliminating the wavy lines or creases generated during the fabric transmission process, and providing a flat fabric surface for subsequent inspection.

[0016] 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

[0017] 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 three-dimensional structural schematic diagram of a visual inspection device for fabric printing and dyeing defects according to the present invention. Figure 2 This is a schematic diagram of the installation structure of the moving platform of a visual inspection device for fabric printing and dyeing defects according to the present invention. Figure 3 This is a schematic diagram of the moving stage and welding strip structure of a visual inspection device for fabric printing and dyeing defects according to the present invention; Figure 4 for Figure 2 Enlarged structural diagram of section A in the middle; Figure 5 This is a schematic diagram of the spring mounting structure of a visual inspection device for fabric printing and dyeing defects according to the present invention; Figure 6 This is a schematic diagram of the installation structure of the positioning block and positioning platform of a visual inspection device for fabric printing and dyeing defects according to the present invention. Figure 7 This is a schematic diagram of the camera installation structure of a visual inspection device for fabric printing and dyeing defects according to the present invention.

[0018] Reference numerals: 1. Frame; 2. Guide roller; 3. Detection box; 4. Guide rail; 5. Slider; 6. Motor I; 7. Drive roller; 8. Motor II; 9. Take-up roller; 10. Moving table; 11. Fixed frame; 12. Cylinder I; 13. Pressure plate; 14. Welding strip; 15. Connecting shaft; 16. Positioning frame; 17. Cylinder II; 18. Push block; 19. Heating plate; 20. Mounting frame; 21. Rotating shaft; 22. Swing rod; 23. Sliding rod; 24. Pressure roller; 25. Spring; 26. Cover plate; 27. Support shaft; 28. Swing frame; 29. ​​Electric push rod; 30. Cylinder III; 31. Pressure roller; 32. Positioning table; 33. Guide groove; 34. Positioning block; 35. Positioning groove; 36. Limiting block; 37. Slot; 38. Fill light; 39. Camera. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances. Example

[0022] like Figures 1-7As shown, a visual inspection device for fabric printing and dyeing defects is disclosed. The device includes a frame 1, which is welded from structural steel and has an overall frame structure. The bottom is equipped with leveling pads, allowing adjustment according to the flatness of the ground to ensure stable operation. Multiple guide rollers 2 are mounted on the frame 1 to guide the fabric. The guide rollers 2 are mounted on the vertical beams on both sides of the frame 1 via bearing seats. Their outer walls are covered with a rubber layer, which serves both as an anti-slip device and to prevent damage to the fabric surface. The inspection box 3 is bolted to the top crossbeam of the frame 1. The inspection box 3 is a rectangular structure made of aluminum alloy, making it lightweight and structurally strong. Inside the inspection box 3 are two cameras 39 for photographic inspection of fabric defects. These cameras are industrial CCD cameras with a resolution of 20 megapixels, a frame rate of 30fps, and a lens focal length of 25mm. The two cameras 39 are symmetrically distributed on the upper and lower sides of the inspection box 3, with each camera shooting at a 45-degree angle to the fabric surface, enabling comprehensive capture of defects on both sides of the fabric. Inside the inspection box 3 are also fixed supplementary lighting lamps 38. These are strip LED lights with a color temperature of 5500K and adjustable brightness, installed on both sides of the inspection box 3, corresponding to the positions of the cameras 39, ensuring uniform lighting in the shooting area and improving image clarity. The take-up roller 9 is housed within the frame 1. It is a cylindrical structure made of seamless steel pipe with a chrome-plated surface for rust and wear resistance. A drive roller 7, made of the same material and structure as the take-up roller 9, is rotatably mounted within the frame 1. A motor II 8, a servo motor, is fixed to the side beam of the frame 1 via a flange. The output of motor II 8 is connected to the drive roller 7 via a coupling. A drive mechanism on the frame 1 drives the take-up roller 9 towards the drive roller 7, utilizing the friction between the drive roller 7 and the take-up roller 9 to rotate and wind up the fabric. The drive mechanism includes a support shaft 27 fixedly mounted inside the frame 1. The support shaft 27 is a stepped shaft made of 45# steel and is fixed to the inner longitudinal beam of the frame 1 via bearing seats at both ends. Two swing frames 28 are rotatably fitted on the outer wall of the support shaft 27. The swing frames 28 are L-shaped steel plates made of Q235 steel. One end of each swing frame 28 is connected to the support shaft 27 via a bearing, and the other end has an arc-shaped groove for placing the take-up roller 9. The take-up roller 9 is placed on the two swing frames 28. Two electric push rods 29 are rotatably mounted on one side of the detection box 3. The electric push rods 29 are ball screw type electric push rods. The cylinder end of each electric push rod is connected to the side of the detection box 3 via a hinge, and the output end of each electric push rod 29 is rotatably connected to the corresponding swing frame 28 via a ball joint. By extending the electric push rod 29, the swing frame 28 can be driven to swing around the support shaft 27. During the swing, the take-up roller 9 is driven to move closer to the drive roller 7. As the diameter of the fabric on the take-up roller 9 gradually increases, the electric push rod 29 is driven to retract according to the diameter of the take-up, so that the take-up roller 9 slowly moves away from the drive roller 7, ensuring that the take-up fabric is always in contact with the drive roller 7, maintaining a stable friction force, and ensuring a uniform take-up speed. The pulling mechanism is located at the top of the frame 1 and is used to smoothly pass one end of the fabric through the detection box 3. The pulling mechanism also includes a pushing component. The outer wall of the take-up roller 9 has a slot 37, which is opened along the axial direction of the take-up roller 9. The pushing component is used to push one end of the fabric into the slot 37 and fix it.

[0023] The pulling mechanism includes two rectangular guide rails 4 fixedly mounted on the frame 1, which are bolted parallel to the top crossbeam of the frame 1. A slider 5, made of wear-resistant cast iron and containing balls, slides along the guide rails 4 to ensure smooth sliding. A trapezoidal threaded screw is rotatably mounted inside one of the guide rails 4, and is installed inside the guide rail 4 via bearing seats at both ends. A nut ring at the bottom of the slider 5 is fitted onto the screw, with the balls inside the nut ring located within the spiral groove of the screw, forming a ball screw drive pair to improve transmission efficiency and positioning accuracy. A connecting shaft 15, a smooth shaft, rotatably connects the two guide rails 4 and is connected to one end of the screw via a coupling. A stepper motor 16 is fixedly mounted inside the frame 1, and is fixed to the inner longitudinal beam of the frame 1 via a motor mount. The output end of the motor 16 is connected to the connecting shaft 15 via a synchronous belt and synchronous pulley to ensure smooth transmission without slippage. The moving platform 10 is a rectangular steel plate made of Q235 steel. It is fixed to the two sliders 5 by bolts. The moving platform 10 is equipped with a fixing component for fixing one end of the fabric to the moving platform 10. The fixing assembly includes two fixing frames 11 fixedly mounted on the top of the moving platform 10. The fixing frames 11 are steel plates and are fixed to both sides of the moving platform 10 by welding. A cylinder I 12 is fixedly mounted on one side of the fixing frame 11, and the cylinder I 12 is fixed to the fixing frame 11 by a cylinder seat. The output ends of the two cylinders I 12 are fixed to the same pressure plate 13 through a connecting plate. The pressure plate 13 is a rectangular steel plate with a silicone pad attached to the bottom to prevent damage to the fabric. At the same time, the output ends of the cylinders I 12 are connected to the pressure plate 13 by a rubber pad to allow for slight displacement when there is slight asynchronous movement. A heating plate 19 is embedded in the top of the moving platform 10. The heating plate 19 is an electric heating plate with a power of 500W and an adjustable surface temperature range of 80-150℃, which is controlled by a temperature controller. The upper surface of the heating plate 19 is covered with Teflon tape to prevent the fabric from sticking to the heating plate 19. The moving platform 10 is equipped with a welding strip 14, which is a copper strip with a rectangular cross-section. The fabric is located between the welding strip 14 and the heating plate 19. When it is necessary to fix the fabric, the cylinder I 12 is activated to extend, driving the pressure plate 13 to move downward. The pressure plate 13 abuts against the welding strip 14 and moves closer to the heating plate 19 to press and fix the fabric. At the same time, the heating plate 19 is energized and heated to heat the fabric, so that the fabric is welded to the welding strip 14, achieving a firm fixation of the fabric and preventing it from loosening during pulling. A magnet is also embedded in the top of the welding strip 14, and an electromagnet is embedded in the slot 37, which can fix the welding strip 14 in the slot 37. The pushing mechanism includes two positioning frames 16 fixedly mounted on the top of the moving platform 10. The positioning frames 16 are L-shaped steel plates symmetrically distributed on both sides of the welding strip 14. The welding strip 14 is located within the two positioning frames 16, which guide and limit its movement. Two cylinders II 17 are fixedly mounted on the top of the moving platform 10, and are bolted to it. A push block 18, made of plastic to prevent scratching the fabric, is fixedly mounted on the output end of each cylinder II 17 via a connecting block. The push block 18 passes through one side of the positioning frame 16. A positioning platform 32, flush with the moving platform 10, is fixedly mounted on the top of the frame 1. The positioning platform 32 is a rectangular platform with a ground surface. A guide groove 33 is formed within the positioning platform 32 to guide the welding strip 14. The width of the guide groove 33 is 0.5 mm wider than the width of the welding strip 14, ensuring smooth passage of the welding strip 14. When it is necessary to push the fabric, the cylinder II 17 is extended, which drives the pusher 18 to move forward. The pusher 18 pushes the welding strip 14 to move along the guide groove 33, pushing one end of the fabric into the slot 37 of the take-up roller 9. Two positioning blocks 34 are fixedly installed on the inner side of the frame 1. The positioning blocks 34 are square iron blocks and are fixed to the inner longitudinal beam of the frame 1 by welding. The top of the positioning block 34 has a positioning groove 35, which is a rectangular groove. Both ends of the take-up roller 9 are fixed with limiting blocks 36 that are adapted to the positioning grooves 35. The limiting blocks 36 are rectangular blocks and are fixed to both ends of the take-up roller 9 by welding. The positioning grooves 35 and the limiting blocks 36 are used to position the take-up roller 9, ensuring that the slot 37 corresponds to the welding strip 14, thus improving the pushing accuracy. The positioning grooves 35 can also be V-shaped, which can quickly cooperate with the limiting blocks 36 to achieve the positioning of the slot 37. The equipment also includes a leveling assembly, which comprises two sets of mounting brackets 20 fixedly mounted on the top of the pressure plate 13. The mounting brackets 20 are steel plates and are bolted to the pressure plate 13. A rotating shaft 21, made of 45# steel, is rotatably mounted through one side of each mounting bracket 20 and is connected to the mounting bracket 20 via bearings. A swing rod 22, made of rectangular steel pipe, is fixedly fitted onto the outer wall of the rotating shaft 21. A pressure roller 24, made of rubber, is located at the bottom end of the swing rod 22. A spring 25, a flat spiral spring, is fitted onto the outer wall of the rotating shaft 21. A cover plate 26, coaxial with the rotating shaft 21, is fixedly mounted on one side of the mounting bracket 20 and is made of circular steel plate, bolted to the mounting bracket 20. The two ends of the spring 25 abut against the outer wall of the rotating shaft 21 and the inner wall of the cover plate 26, respectively. The multiple swing rods 22 are arranged in two sets, each tilted outwards at an angle of 30 degrees. Under the action of the spring 25, the swing rod 22 drives the pressure roller 24 to always contact the surface of the fabric, which plays a role in smoothing the fabric and preventing the fabric wrinkles from affecting the detection effect. A sliding rod 23 is slidably provided inside the swing rod 22. The sliding rod 23 is a rectangular steel tube, and the fit clearance between it and the swing rod 22 is 0.02-0.05mm. The pressure roller 24 is rotatably located at the bottom end of the sliding rod 23. By sliding the sliding rod 23 inside the swing rod 22, it can adapt to fabrics of different thicknesses and ensure that the pressure roller 24 is always in contact with the fabric surface. Two cylinders III30 are fixedly mounted on the frame 1. These cylinders are standard cylinders and are fixed to the vertical beams on both sides of the frame 1 via cylinder seats. The output ends of both cylinders III30 are rotatably connected to the same pressure roller 31 for guiding the fabric via bearing seats. The pressure roller 31 has the same structure and material as the guide roller 2. By extending the cylinders III30, the height of the pressure roller 31 can be changed, thus guiding the fabric and simultaneously tensioning it to ensure it remains flat during inspection and prevents it from contacting the mounting frame 20.

[0024] Working principle: First, the fabric is fixed. One end of the fabric to be tested is placed on the heating plate 19 of the moving table 10, bypassing the guide roller 2. The welding strip 14 is placed on top, so that the welding strip 14 is located within the two positioning frames 16. At this time, the cylinder I 12 on the fixing frame 11 is activated and extended, driving the pressure plate 13 to move downward. During the downward pressing process, when the pressure roller 24 contacts the fabric, since the multiple swing rods 22 are divided into two groups and tilted outward at 30 degrees respectively, the pressure roller 24 applies a force to both sides of the fabric, flattening the fabric and avoiding wrinkles that would affect the subsequent testing results. At the same time, the sliding rod 23 inside the swing rod 22 can slide freely according to the fabric thickness, ensuring that the pressure roller 24 is always in contact with the fabric surface, adapting to the flattening requirements of fabrics of different thicknesses. When the pressure plate 13 contacts the welding strip 14 and moves closer to the heating plate 19, it presses the fabric between the two. At the same time, the heating plate 19 is energized and heated to 80-150℃, which heats the contact area of ​​the fabric, making the fabric and welding strip 14 firmly bonded together. This prevents the fabric from loosening or falling off during subsequent pulling, laying the foundation for stable fabric transmission. After the fabric is secured, the pulling mechanism begins operation. Motor I6 inside frame 1 starts, and its output transmits power to connecting shaft 15 via a synchronous belt and pulley. Connecting shaft 15 rotates, driving the connected screw to rotate. Since the nut ring at the bottom of slider 5 is fitted onto the screw, and the balls inside the nut ring are located within the screw's helical groove, a ball screw transmission pair is formed. The screw's rotational motion is converted into linear motion of slider 5 along guide rail 4. The two sliders 5 move synchronously, driving the movable platform 10 fixed on them to move along guide rail 4, thus smoothly pulling one end of the fabric across the detection box 3.

[0025] As the fabric passes through inspection box 3, the vision inspection system inside inspection box 3 operates synchronously. The supplementary light 38 illuminates the fabric surface with 5500K color temperature light, and its brightness can be adjusted according to the fabric color and ambient light to ensure uniform lighting in the inspection area. Two cameras 39 (industrial CCD cameras) symmetrically distributed on the upper and lower sides of inspection box 3 continuously capture images of the passing fabric at a 45-degree angle. The high resolution of 20 megapixels and the frame rate of 30fps ensure image clarity and acquisition speed, enabling comprehensive capture of defects on both sides of the fabric. The images captured by camera 39 are transmitted to the control system in real time. The control system processes the images using image recognition algorithms to identify and record defects such as spots, color differences, and scratches on the fabric.

[0026] When the fabric passes through the detection box 3, the moving stage 10 contacts the positioning stage 32, and the take-up roller 9 is placed in the two positioning blocks 34. During the placement process, the positioning groove 35 and the limiting block 36 are used to position the take-up roller 9, ensuring that the slot 37 corresponds to the welding strip 14. The cylinder I 12 is retracted, driving the pressure plate 13 away from the welding strip 14. The pushing mechanism is activated, feeding one end of the fabric into the take-up roller 9. The cylinder II 17 at the top of the moving stage 10 extends, pushing the push block 18 forward. The push block 18 abuts against the welding strip 14, causing the welding strip 14 to move along the guide groove 33 on the positioning stage 32 under the guidance and limiting action of the positioning frame 16. Finally, one end of the fabric is pushed into the slot 37 on the outer wall of the take-up roller 9, and the electromagnet inside the slot 37 is activated, causing it to attract the magnet on the welding strip 14 and fix it inside the take-up roller 9. After the fabric end is fixed in the slot 37 of the take-up roller 9, the motor I6 is started to rotate in the reverse direction, driving the moving table 10 to reset and move. The cylinder III 30 on the frame 1 extends and drives the pressure roller 31 to move downward to apply appropriate pressure to the fabric, which can tension the fabric. At the same time, it ensures that the fabric will not come into contact with the pressure roller 24 during the movement, and ensures that the fabric remains flat in the detection area in the detection box 3, further improving the detection accuracy.

[0027] The winding mechanism begins operation. The electric push rod 29 on one side of the detection box 3 starts and extends, its output pushing the swing frame 28 to swing around the support shaft 27. The winding roller 9, placed on the swing frame 28, moves with the swing frame 28, gradually approaching and contacting the drive roller 7. Subsequently, the motor II 8 on one side of the frame 1 starts, its output driving the drive roller 7 to rotate via a coupling. The friction between the drive roller 7 and the winding roller 9 drives the winding roller 9 to rotate synchronously, beginning the winding of the fabric. During the winding process, as the diameter of the fabric on the winding roller 9 gradually increases, the control system, based on a preset program or changes in fabric diameter detected by sensors, controls the electric push rod 29 to gradually retract, causing the swing frame 28 to swing in the opposite direction. This causes the winding roller 9 to slowly move away from the drive roller 7, ensuring that the wound fabric always maintains appropriate contact force with the drive roller 7, maintaining stable friction, thereby ensuring a uniform winding speed and preventing the fabric from being wound too loosely or too tightly.

[0028] When the tail end of the fabric detaches from the unwinding roller, the fabric continues to be fixed so that the tail end of the fabric moves smoothly on the frame 1. 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 visual inspection device for fabric printing and dyeing defects, characterized in that, include: A frame (1) is provided with a plurality of guide rollers (2) for guiding the movement of the fabric. The detection box (3) is fixedly installed on the top of the frame (1). The detection box (3) is equipped with two cameras (39) for image acquisition of the moving fabric surface and a supplementary light (38) for providing illumination for image acquisition. The take-up roller (9) is movably disposed within the frame (1); The drive roller (7) is rotatably mounted inside the frame (1); Motor II (8) is fixedly installed on one side of the frame (1), and its output end is connected to the drive roller (7) for transmission. A drive mechanism is provided on the frame (1) for driving the take-up roller (9) to move toward and abut against the drive roller (7), and driving the take-up roller (9) to rotate to take up the fabric by the friction between the drive roller (7) and the take-up roller (9); A pulling mechanism is provided on the top of the frame (1) for clamping and pulling the first or last end of the fabric smoothly through the detection area below the detection box (3); The outer wall of the take-up roller (9) is provided with a slot (37), and the pulling mechanism also includes a pushing component for pushing and fixing the end of the fabric that has been clamped by it into the slot (37).

2. The visual inspection equipment for fabric printing and dyeing defects according to claim 1, characterized in that, The drive mechanism includes: The support shaft (27) is fixedly installed inside the frame (1); Two swing frames (28) are rotatably fitted onto the outer wall of the support shaft (27), and the take-up roller (9) is supported on the two swing frames (28); Two electric push rods (29) have their cylinder ends hinged to one side of the detection box (3), and their output ends are respectively hinged to the corresponding swing frame (28); By controlling the extension and retraction of the electric push rod (29), the swing frame (28) is driven to swing around the support shaft (27) to drive the take-up roller (9) to move closer to or away from the drive roller (7), and the position of the take-up roller (9) is adjusted according to the change of the fabric roll diameter during the winding process so that the fabric always remains in contact with the drive roller (7).

3. The visual inspection equipment for fabric printing and dyeing defects according to claim 1, characterized in that, The pulling mechanism includes: Two guide rails (4) are fixedly installed in parallel on the top of the frame (1); The slider (5) slides in conjunction with the guide rail (4); The screw is rotatably disposed in one of the guide rails (4), and the bottom of the slider (5) is provided with a nut ring that forms a ball screw pair with the screw; The connecting shaft (15) is rotatably disposed between the two guide rails (4), and one end of it is connected to the screw drive; Motor I (6) is fixedly installed in the frame (1), and its output end is connected to the connecting shaft (15) through a synchronous belt drive mechanism; The movable stage (10) is fixedly installed on the two sliders (5) and moves along the guide rail (4) with the sliders (5); A fixing component is installed on the moving platform (10) for fixing one end of the fabric to the moving platform (10) during the fabric traction process.

4. The visual inspection equipment for fabric printing and dyeing defects according to claim 3, characterized in that, The fixing component includes: Two mounting brackets (11) are fixedly installed on the top of the mobile platform (10); Cylinder I (12) is fixedly installed on one side of each of the aforementioned brackets (11); The pressure plate (13) is connected at both ends to the output ends of the two cylinders I (12); A heating plate (19) is embedded in the top surface of the movable platform (10); Welding rod (14) can be placed on the moving table (10) and located above the heating plate (19); The cylinder I (12) drives the pressure plate (13) to press down, pressing the fabric laid between the welding strip (14) and the heating plate (19) together, and the heating plate (19) heats the fabric to make it melt and adhere to the welding strip (14) to achieve fixation.

5. The visual inspection equipment for fabric printing and dyeing defects according to claim 4, characterized in that, The push component includes: Two positioning frames (16) are fixedly installed on the top of the moving platform (10), and the welding strip (14) is limited between the two positioning frames (16); Two cylinders II (17) are fixedly installed on the top of the movable platform (10); Push block (18) is fixedly installed at the output end of each of the cylinders II (17) and can push the welding strip (14) through the side wall of the positioning frame (16). The positioning platform (32) is fixedly installed on the top of the frame (1) and flush with the end of the moving track of the moving platform (10). The positioning platform (32) is provided with a guide groove (33). When the moving platform (10) moves to contact the positioning platform (32), the cylinder II (17) drives the push block (18) to move, pushing the end of the fabric with the welding strip (14) into the slot (37) of the take-up roller (9) through the guide groove (33).

6. The visual inspection equipment for fabric printing and dyeing defects according to claim 5, characterized in that, Two positioning blocks (34) are fixedly installed on the inner side of the frame (1). The top of the positioning block (34) is provided with a positioning groove (35). Both ends of the take-up roller (9) are fixedly provided with limit blocks (36). The shape of the limit blocks (36) is adapted to the positioning groove (35). When the take-up roller (9) is placed on the swing frame (28), the limiting block (36) is embedded in the positioning groove (35) to circumferentially position the take-up roller (9) and ensure that the slot (37) on it is aligned with the guide groove (33).

7. The visual inspection equipment for fabric printing and dyeing defects according to claim 4, characterized in that, It also includes a leveling component, the leveling component comprising: Two sets of mounting brackets (20) are fixedly installed on the top of the pressure plate (13); A pivot (21) is rotatably mounted on each of the mounting brackets (20). The swing rod (22) is fixedly sleeved on the outer wall of the rotating shaft (21); The sliding rod (23) is slidably disposed within the swing rod (22); The pressure roller (24) is rotatably mounted on the bottom end of the sliding rod (23); The spring (25) is sleeved on the outside of the rotating shaft (21), with its inner end connected to the rotating shaft (21) and its outer end connected to the cover plate (26) fixed to the mounting bracket (20); The two sets of swing rods (22) are respectively tilted outwards in opposite directions; Under the torque of the spring (25), the pressure roller (24) is given pressure toward the fabric and contacts the fabric before the pressure plate (13) during the pressing process. It uses its inclined layout to spread the fabric outward to achieve flattening. The sliding rod (23) can adapt to changes in fabric thickness.

8. The visual inspection device for fabric printing and dyeing defects according to any one of claims 1 to 7, characterized in that, Two cylinders III (30) are also fixedly installed on the frame (1), and a pressure roller (31) is rotatably installed at the output end of the two cylinders III (30). By controlling the extension and retraction of the cylinder III (30), the pressure roller (31) is driven to press down or lift up, thereby tensioning or relaxing the fabric passing underneath it.

9. The visual inspection device for fabric printing and dyeing defects according to any one of claims 3 to 7, characterized in that, The slot (37) is provided with a first magnetic element, and the welding strip (14) is provided with a second magnetic element that attracts the first magnetic element; When the pushing component pushes the end of the fabric with the welding strip (14) into the slot (37), the welding strip (14) is fixed in the slot (37) by the attraction between the first magnetic element and the second magnetic element.

10. The visual inspection device for fabric printing and dyeing defects according to any one of claims 1 to 7, characterized in that, The two cameras (39) are arranged symmetrically inside the detection box (3), and their optical axes are at a 45° angle to the fabric surface; The fill light (38) is a strip LED light and is set to correspond to the shooting area of ​​the camera (39).

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