Color difference visual detection device and method based on polyester cotton fabric printing and dyeing processing

Abstract

The application discloses a color difference visual detection device and method based on polyester cotton fabric printing and dyeing processing, which comprises a mounting seat, a leveling mechanism and a detection mechanism are sequentially arranged on the top of the mounting seat from left to right, and relates to the technical field of polyester cotton fabric printing and dyeing processing detection. The color difference visual detection device and method based on polyester cotton fabric printing and dyeing processing can realize the real-time scanning of the cloth surface flatness before the color difference detection of the cloth, automatically identify defects such as wrinkles and protrusions, and realize the pre-positioning accurate determination of the wrinkle defects through the additional laser monitoring assembly. Meanwhile, the lifting cylinder and the bidirectional synchronous cylinder of the leveling mechanism are matched to realize the cycle leveling action of the leveling roller under the pressure flattening, lifting and resetting, realize the rapid flattening of the cloth wrinkles, eliminate the interference of the cloth wrinkles on the subsequent color difference detection from the source, and form a flexible fitting leveling structure relying on the pressure sensor and the buffer structure, so that the leveling pressure can be adaptively regulated and controlled according to the characteristics of the polyester cotton fabric.

Description

Technical Field

[0001] This invention relates to the field of testing technology for polyester-cotton fabric printing and dyeing processes, specifically to a color difference visual testing device and method based on polyester-cotton fabric printing and dyeing processes. Background Technology

[0002] Polyester-cotton fabric combines the breathability and comfort of cotton with the wear resistance and wrinkle resistance of chemical fibers. It is a widely used fabric category in the printing and dyeing process. In the continuous printing and dyeing production of polyester-cotton fabric, fabric wrinkles and poor printing and dyeing are the two most common processing defects, which directly affect the quality of finished fabric and the factory qualification rate.

[0003] The reference patent title is: "A Visual Inspection Device and Method for Printed and Dyed Products" (Authorization Announcement No.: CN120609846A, Authorization Announcement Date: 2025.09.09). This device is installed between the fabric unwinding and rewinding mechanisms and includes a base, an inspection box, a camera, a display screen, and a tensioning mechanism. The inspection box is fixed to the top of the base and has inlet holes on both sides for fabric passage. The camera is placed inside the inspection box for inspection. The tensioning mechanism includes a fixing frame and multiple inclined first support rods, fixed inside the inspection box. The fabric passes through the first support rods, forming a wavy path. A corresponding number of cameras image the fabric from different angles. The tensioning mechanism also includes a first connecting frame, a second connecting frame, and a driving component. The second connecting frame is fixed to the base, and pressure plates are slidably arranged on opposite sides of the two connecting frames. The driving component drives the upper pressure plate to move downwards to cooperate with the lower pressure plate to clamp the fabric. The cameras are located on both sides. This device can improve the accuracy and comprehensiveness of identifying defects such as flaws and color differences in printed and dyed products.

[0004] Based on the above-mentioned documents, the detection mode of existing printing and dyeing inspection equipment is mostly to directly shoot and detect the color difference of the fabric first, without setting up a pre-wrinkle monitoring and adaptive leveling process. During the transportation process, wrinkles and bulges are easily formed on the fabric surface, which will directly cause distortion of the visual shooting image and uneven light refraction, resulting in large deviation of color difference detection data and high false detection rate, and failing to guarantee detection accuracy. Therefore, this invention provides a color difference visual detection device and method based on polyester-cotton fabric printing and dyeing processing. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a color difference visual detection device and method based on polyester-cotton fabric printing and dyeing processing, which solves the problems of color difference detection being easily affected by wrinkles, having a high false detection rate, and affecting detection accuracy in existing technologies.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a color difference visual inspection device based on polyester-cotton fabric printing and dyeing processing, comprising a mounting base, wherein a leveling mechanism and a detection mechanism are sequentially arranged on the top of the mounting base from left to right, and the leveling mechanism includes: The leveling assembly includes a support plate fixedly installed on the top left side of the mounting base. A lifting cylinder is fixedly installed on the top of the support plate. A lifting plate is fixedly installed on the piston end of the lifting cylinder. A bidirectional synchronous cylinder is fixedly installed on the bottom surface of the lifting plate. Movable seats are fixedly installed on the piston ends of both sides of the bidirectional synchronous cylinder. A pressure sensor is fixedly installed on the top of the inner cavity of the movable seat. A buffer rod is slidably connected inside the movable seat. The top end of the buffer rod is fixedly connected to the detection end of the pressure sensor. A concave plate is fixedly installed on the bottom end of the buffer rod. A leveling roller is rotatably connected to the inner side wall of the concave plate. Limiting components are located on both sides of the lifting plate and are used to limit the horizontal sliding of the moving seat; The monitoring component, located on the side of the support plate, is used to monitor the flatness of the polyester-cotton fabric.

[0007] Preferably, a buffer spring is sleeved on the outside of the buffer rod, the top end of the buffer spring abuts against the bottom surface of the movable seat, and the bottom end of the buffer spring abuts against the top surface of the concave plate.

[0008] Preferably, the limiting component includes limiting rods fixedly installed on both sides of the lifting plate, a limiting block slidably connected to the surface of the limiting rod, and the side of the limiting block being fixedly connected to the side of the movable seat.

[0009] Preferably, a support roller is rotatably connected to the inner wall of the support plate, the support roller is located directly below the leveling roller, a conveying roller is rotatably arranged on the left side of the support plate, a guide plate is fixedly installed on the right side of the top of the mounting base, a guide roller is rotatably connected to the inner side of the guide plate, and the guide roller and the support roller are arranged horizontally.

[0010] Preferably, the monitoring component includes two sets of symmetrically arranged assembly plates, each assembly plate having an assembly groove on its surface. The assembly plates are detachably connected to the side of a support plate via assembly screws, and a laser emitter and a laser receiver are respectively fixedly installed at the ends of the two sets of assembly plates.

[0011] Preferably, the detection mechanism includes two sets of connecting plates symmetrically and fixedly installed on the top of the mounting base. Positioning rods are vertically fixedly installed on the inner sidewalls of both sets of connecting plates. Upper and lower equipment plates are vertically slidably mounted on the surface of the positioning rods. A control cylinder is fixedly installed on the inner side of each equipment plate. The piston end of the control cylinder is fixedly connected to the bottom of the lower equipment plate. The two sets of equipment plates slide synchronously vertically through a linkage assembly. Fill lights are fixedly installed on the opposite surfaces of the two sets of equipment plates. An industrial inspection camera slides horizontally within each equipment plate via an adjustment assembly.

[0012] Preferably, the linkage assembly includes linkage rods rotatably mounted on the sides of the upper and lower corresponding equipment plates and linkage plates rotatably mounted on the sides of the equipment plates, with both ends of the linkage plate rotatably connected to one end of the upper and lower corresponding linkage rods, respectively.

[0013] Preferably, the adjustment assembly includes an adjustment motor fixedly installed on the top of the equipment plate, the output end of the adjustment motor extending into the equipment plate and fixedly installed with an adjustment rod, an adjustment block fixedly installed at one end of the adjustment rod, the adjustment block driving a sliding plate to slide through a transmission assembly, the bottom of the sliding plate extending out of the equipment plate and fixedly installed with an mounting plate, the bottom of the mounting plate being detachably and fixedly connected to an industrial inspection camera.

[0014] Preferably, the transmission assembly includes a transmission plate, the surface of which is provided with a transmission groove, the inner surface of which slides in contact with the outer surface of the adjusting block, and transmission rods are fixedly installed on the left and right sides of the transmission plate, one end of which is fixedly connected to the side of the corresponding sliding plate.

[0015] This invention also discloses a detection method for a color difference visual detection device based on the printing and dyeing process of polyester-cotton fabrics, comprising the following steps: S1. Smooth Fabric Conveying and Introduction: The polyester-cotton printed fabric to be tested travels along the equipment conveying path and is pre-conveyed by the leveling mechanism on the mounting base, so that the polyester-cotton fabric is kept in a stable straight conveying state, providing a stable and regular conveying foundation for subsequent wrinkle monitoring, adaptive leveling and color difference visual inspection. S2. Real-time monitoring of fabric wrinkles in the front: During the fabric conveying process, the monitoring components of the leveling mechanism are used to monitor the flatness and wrinkle status of the polyester-cotton fabric in the conveying state in real time to determine whether there are wrinkle defects on the fabric surface. S3. Adaptive Flexible Leveling Closed-Loop Adjustment: If the monitoring component detects wrinkles on the fabric surface, it activates the leveling component of the leveling mechanism to perform adaptive leveling. The lifting plate is raised and lowered by the lifting cylinder at the top of the support plate to adjust the leveling height according to the fabric thickness. The two-way synchronous cylinder at the bottom of the lifting plate drives the two moving seats to slide horizontally, adjusting the horizontal expansion of the leveling to smooth the fabric surface. During the operation, the pressure sensor, buffer rod, and buffer structure inside the moving seat make the leveling roller flexibly fit the fabric surface, sensing the leveling pressure in real time and adapting to the stretching characteristics of the polyester-cotton fabric to avoid stretching damage to the fabric. At the same time, the limiting component limits the horizontal sliding of the moving seat to ensure stable operation of the leveling operation until the monitoring component detects that the wrinkles on the fabric surface have been eliminated and the flatness has reached the standard, at which point the leveling operation stops. S4. Color Difference Visual Inspection: Fabric that has passed the wrinkle smoothing standard is continuously transported to the inspection agency area. The inspection agency collects images of the front and back of the smoothed polyester-cotton fabric. The equipment control system performs calculation and analysis on the collected image data, accurately identifies and calculates the color difference defect data of the fabric surface, and completes the online continuous color difference visual inspection of the polyester-cotton printed and dyed fabric.

[0016] Beneficial effects This invention provides a color difference visual inspection device and method based on the printing and dyeing process of polyester-cotton fabrics. Compared with the prior art, it has the following advantages: 1. This color difference visual inspection device and method based on polyester-cotton fabric printing and dyeing processing, by adding a laser monitoring component, can scan the fabric surface flatness in real time before color difference detection, automatically identify defects such as wrinkles and protrusions, and achieve accurate pre-judgment of wrinkle defects; at the same time, through the cooperation of the lifting cylinder and bidirectional synchronous cylinder of the leveling mechanism, the leveling roller is pressed down to flatten and lifted to reset in a cyclical leveling action, realizing the rapid leveling of fabric wrinkles, eliminating the interference of fabric wrinkles on subsequent color difference detection from the source, and relying on the pressure sensor and buffer structure to form a flexible and fitted leveling structure, which can adaptively adjust the leveling pressure according to the characteristics of polyester-cotton fabric.

[0017] 2. The color difference visual inspection device and method based on polyester-cotton fabric printing and dyeing processing can adaptively adapt to the inspection spacing of polyester-cotton fabrics of different thicknesses by setting a linkage lifting equipment plate inside the inspection mechanism; at the same time, it is equipped with an adjustment component that can slide horizontally back and forth and an industrial inspection camera to effectively expand the horizontal shooting and acquisition range of the fabric; with the help of dual-sided supplementary lights to build a standardized and non-discriminatory supplementary lighting detection optical path, it can effectively avoid image acquisition deviation problems caused by external light, fabric reflection and shooting blind spots.

[0018] 3. The color difference visual inspection device and method based on polyester-cotton fabric printing and dyeing process integrates a conveying structure, a leveling mechanism and an inspection mechanism to realize the integrated automated operation of polyester-cotton printed and dyed fabric conveying, wrinkle monitoring, adaptive leveling and color difference detection. The various mechanisms work together and the process is connected in a closed loop. The continuous online inspection operation can be completed without manual intervention, which greatly reduces the cost of manual operation. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the external structure of the present invention; Figure 2 This is a three-dimensional schematic diagram of the leveling component of the present invention; Figure 3 This is a three-dimensional schematic diagram of the limiting component of the present invention; Figure 4 This is a three-dimensional schematic diagram of the sliding plate, mounting plate, and industrial inspection camera of the present invention; Figure 5This is a cross-sectional view of the internal structure of the movable base of the present invention; Figure 6 This is a schematic diagram of the surface structure of the assembly plate of the present invention; Figure 7 This is a three-dimensional schematic diagram of the testing mechanism of the present invention; Figure 8 This is a three-dimensional schematic diagram of the surface structure of the device plate of the present invention; Figure 9 This is a cross-sectional view of the internal structure of the device board of the present invention; Figure 10 This is an exploded structural diagram of the adjustment component and transmission component of the present invention.

[0020] In the diagram: 1-Mounting base, 2-Leveling mechanism, 21-Leveling component, 211-Support plate, 212-Lifting cylinder, 213-Lifting plate, 214-Bidirectional synchronous cylinder, 215-Moving seat, 216-Pressure sensor, 217-Buffer rod, 218-Leveling roller, 22-Limiting component, 221-Limiting rod, 222-Limiting block, 23-Monitoring component, 231-Assembly plate, 232-Assembly screw, 233-Laser emitter, 234-Laser receiver, 3-Detection mechanism, 31-Connecting... 32-Positioning rod, 33-Equipment plate, 34-Control cylinder, 35-Linkage assembly, 351-Linkage rod, 352-Linkage plate, 36-Supplemental light, 37-Adjustment assembly, 371-Adjustment motor, 372-Adjustment rod, 373-Adjustment block, 374-Sliding plate, 375-Mounting plate, 38-Industrial inspection camera, 4-Buffer spring, 5-Support roller, 6-Conveyor roller, 7-Guide plate, 8-Guide roller, 9-Transmission assembly, 91-Transmission plate, 92-Transmission groove, 93-Transmission rod. Detailed Implementation

[0021] 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.

[0022] Please see Figure 1-10 The present invention provides a technical solution: A color difference visual inspection device based on polyester-cotton fabric printing and dyeing processing includes a mounting base 1. From left to right, a leveling mechanism 2 and an inspection mechanism 3 are sequentially arranged on the top of the mounting base 1. The leveling mechanism 2 includes: The leveling assembly 21 includes a support plate 211 fixedly installed on the top left side of the mounting base 1. A lifting cylinder 212 is fixedly installed on the top of the support plate 211. A lifting plate 213 is fixedly installed on the piston end of the lifting cylinder 212. A bidirectional synchronous cylinder 214 is fixedly installed on the bottom surface of the lifting plate 213. A movable seat 215 is fixedly installed on the piston ends of both sides of the bidirectional synchronous cylinder 214. A pressure sensor 216 is fixedly installed on the top of the inner cavity of the movable seat 215. A buffer rod 217 is slidably connected inside the movable seat 215. The top end of the buffer rod 217 is fixedly connected to the detection end of the pressure sensor 216. A concave plate is fixedly installed on the bottom end of the buffer rod 217. A leveling roller 218 is rotatably connected to the inner side wall of the concave plate. Limiting components 22 are disposed on both sides of the lifting plate 213 and are used to limit the horizontal sliding of the movable seat 215. The monitoring component 23 is located on the side of the support plate 211 and is used to monitor the flatness of the polyester-cotton fabric.

[0023] The device is positioned between the fabric unwinding and rewinding mechanisms; The lifting cylinder is a standard linear reciprocating pneumatic actuator; The bidirectional synchronous cylinder is a symmetrical bidirectional output pneumatic component that can synchronously drive the two moving seats to slide horizontally in opposite directions, ensuring consistent leveling displacement on both sides and avoiding skewed fabric leveling caused by unilateral offset. The movable seat has a hollow cavity structure with reserved internal space for mounting pressure sensors, cushioning, and other components. The pressure sensor uses a high-precision patch pressure sensing element, which is fixed to the top of the inner cavity of the moving seat. It can collect the vertical pressure value in real time during the leveling operation, accurately feed back the bonding pressure between the leveling roller and the fabric, and provide data support for the adaptive control of the flexible leveling pressure. The buffer rod and the buffer spring together form a flexible buffer assembly. The buffer rod is made of smooth round steel and has a very small sliding gap with the inside of the moving seat, ensuring smooth sliding. The leveling roller is made of smooth rubber roller material and is rotatably mounted on the inner side of the concave plate. It can rotate adaptively with the fabric conveying, reducing friction damage to the fabric surface. By adding a laser monitoring component 23, the fabric surface flatness can be scanned in real time before the fabric color difference detection, and defects such as wrinkles and protrusions can be automatically identified, so as to achieve accurate judgment of wrinkle defects in advance. At the same time, through the cooperation of the lifting cylinder 212 and the bidirectional synchronous cylinder 214 of the leveling mechanism 2, the leveling roller 218 is pressed down to flatten and lifted to reset in a cyclical leveling action, so as to achieve rapid leveling of fabric wrinkles, eliminate the interference of fabric wrinkles on subsequent color difference detection from the source, and rely on the pressure sensor 216 and the buffer structure to form a flexible and close-fitting leveling structure, which can adaptively adjust the leveling pressure according to the characteristics of polyester-cotton fabric.

[0024] In this embodiment, a buffer spring 4 is sleeved on the outside of the buffer rod 217. The top end of the buffer spring 4 abuts against the bottom surface of the movable seat 215, and the bottom end of the buffer spring 4 abuts against the top surface of the concave plate.

[0025] The buffer spring is a high-elasticity, pressure-resistant spring that can achieve elastic buffering and reset, offset rigid compressive stress, and is compatible with the elastic stretching characteristics of polyester-cotton fabric, eliminating the problems of stretching and breakage. In this embodiment, the limiting component 22 includes limiting rods 221 fixedly installed on both sides of the lifting plate 213, and limiting blocks 222 are slidably connected to the surface of the limiting rods 221. The side of the limiting blocks 222 is fixedly connected to the side of the movable seat 215.

[0026] Referring to the attached drawings, a limiting plate is fixedly installed at one end of the limiting rod. The limiting plate slides in contact with the guide rod vertically installed on the inner wall of the groove on the side of the support plate, which can maintain the stability of the vertical sliding of the lifting plate. In this embodiment, a support roller 5 is rotatably connected to the inner side wall of the support plate 211. The support roller 5 is located directly below the leveling roller 218. A conveying roller 6 is rotatably arranged on the left side of the support plate 211. A guide plate 7 is fixedly installed on the right side of the top of the mounting base 1. A guide roller 8 is rotatably connected to the inner side of the guide plate 7. The guide roller 8 and the support roller 5 are arranged horizontally.

[0027] The guide rollers and support rollers are of the same specifications and are symmetrically and horizontally arranged on the top of the mounting base; In this embodiment, the monitoring component 23 includes two sets of symmetrically arranged assembly plates 231. The surface of the assembly plate 231 is provided with an assembly groove. The assembly plate 231 is detachably connected to the side of the support plate 211 by an assembly screw 232. A laser emitter 233 and a laser receiver 234 are respectively fixedly installed at the ends of the two sets of assembly plates 231.

[0028] The laser emitter and laser receiver are high-precision laser detection devices arranged in pairs, symmetrically installed at the ends of two sets of assembly plates, and horizontally aligned to form a stable laser detection optical path. When wrinkles or bulges appear on the fabric surface, the fabric will block or lift the laser optical path, and the on / off and offset signals of the optical path will change. The equipment control system will then accurately determine the fabric surface flatness defects based on this, realizing non-contact, real-time, and high-precision pre-wrinkle monitoring. The assembly screw passes through the assembly groove on the surface of the assembly plate. The position of the assembly plate, laser emitter or laser receiver on the side of the support plate can be flexibly adjusted by the assembly screw and the assembly groove, so as to match the fabric of different thicknesses. In this embodiment, the detection mechanism 3 includes two sets of connecting plates 31 symmetrically and fixedly installed on the top of the mounting base 1. The inner sidewalls of the two sets of connecting plates 31 are vertically fixedly installed with positioning rods 32. The surfaces of the positioning rods 32 are vertically slidably provided with upper and lower sets of equipment plates 33. The inner side of the equipment plates 33 is fixedly installed with control cylinders 34. The piston end of the control cylinders 34 is fixedly connected to the bottom of the lower equipment plate 33. The two sets of equipment plates 33 achieve synchronous vertical sliding through the linkage component 35. The opposite surfaces of the two sets of equipment plates 33 are fixedly installed with supplementary lights 36. The industrial inspection camera 38 is driven to slide horizontally inside the equipment plates 33 through the adjustment component 37.

[0029] The front of the connecting plate is also equipped with two sets of warning lights that are electrically connected to the external control system. One set is connected to the upper industrial inspection camera and the other set is connected to the lower industrial inspection camera. They are used to provide light warnings when color difference occurs on the front or back of the fabric. The control cylinder is a vertical telescopic drive element used to drive the lower equipment plate to move vertically. It works with the linkage component to realize the synchronous vertical lifting and lowering of the two sets of equipment plates. It can adaptively adapt to the detection spacing of polyester-cotton fabrics of different thicknesses and has extremely strong versatility. The supplementary light uses a high-brightness diffused supplementary light source, which is symmetrically arranged at the top and bottom relative positions. It can output uniform and soft detection light, eliminate the interference of ambient light and shadow, fabric reflection and shadow, and build a standardized and non-differentiated visual detection light path to ensure the clarity and consistency of image acquisition. The positioning rod is used to guide and limit the vertical sliding of the equipment plate; By setting up a linkage lifting device plate 33 inside the detection mechanism 3, the detection spacing of polyester-cotton fabrics of different thicknesses can be adaptively adapted; at the same time, with the horizontally sliding adjustment component 37 and industrial inspection camera 38, the horizontal shooting and acquisition range of the fabric is effectively expanded. With the help of the dual-sided supplementary light lamps 36, a standardized and non-discriminatory supplementary lighting detection optical path is constructed, which can effectively avoid image acquisition deviation problems caused by external light, fabric reflection and shooting blind spots.

[0030] In this embodiment, the linkage component 35 includes a linkage rod 351 rotatably mounted on the sides of the upper and lower corresponding equipment plates 33 and a linkage plate 352 rotatably mounted on the sides of the equipment plate 33. The two ends of the linkage plate 352 are respectively rotatably connected to one end of the upper and lower corresponding linkage rods 351.

[0031] In this embodiment, the adjustment component 37 includes an adjustment motor fixedly installed on the top of the equipment plate 33. The output end of the adjustment motor 371 extends into the equipment plate 33 and is fixedly installed with an adjustment rod 372. An adjustment block 373 is fixedly installed at one end of the adjustment rod. The adjustment block 373 drives the sliding plate 374 to slide through the transmission component 9. The bottom of the sliding plate 374 extends out of the equipment plate 33 and is fixedly installed with a mounting plate 375. The bottom of the mounting plate 375 is detachably and fixedly connected to the industrial inspection camera 38.

[0032] The regulating motor is a forward and reverse speed-adjustable servo motor; The inner wall of the device plate is fixedly installed with a guide rail for guiding and limiting the sliding plate. The industrial inspection camera is a high-definition industrial vision camera that can be detachably installed on the bottom of the mounting plate. It is easy to install and remove, and convenient to repair and replace. It can acquire high-definition images of the front and back of the fabric at high speed, providing accurate image data for back-end color difference calculation and analysis. In this embodiment, the transmission assembly 9 includes a transmission plate 91, and a transmission groove 92 is formed on the surface of the transmission plate 91. The inner surface of the transmission groove 92 is slidably engaged with the outer surface of the adjusting block 373. Transmission rods 93 are fixedly installed on the left and right sides of the transmission plate 91, and one end of the transmission rod 93 is fixedly connected to the side of the corresponding sliding plate 374.

[0033] By integrating the conveying structure, leveling mechanism 2, and detection mechanism 3, the system achieves integrated automated operation of polyester-cotton printed fabric conveying, wrinkle monitoring, adaptive leveling, and color difference detection. The various mechanisms work together in a coordinated manner, and the processes are connected in a closed loop. The entire process can be completed without manual intervention, thus significantly reducing the cost of manual operation.

[0034] This invention also discloses a detection method for a color difference visual detection device based on the printing and dyeing process of polyester-cotton fabrics, comprising the following steps: S1. Smooth Fabric Conveying and Introduction: The polyester-cotton printed fabric to be tested travels along the equipment conveying path and is pre-conveyed by the leveling mechanism 2 on the mounting base 1, so that the polyester-cotton fabric is kept in a stable straight conveying state, providing a stable and regular conveying basis for subsequent wrinkle monitoring, adaptive leveling and color difference visual inspection. S2. Real-time monitoring of fabric wrinkles in the front: During the fabric conveying process, the monitoring component 23 of the leveling mechanism 2 is used to monitor the flatness and wrinkle status of the polyester-cotton fabric in the conveying state in real time to determine whether there are wrinkle defects on the fabric surface. S3. Adaptive Flexible Leveling Closed-Loop Adjustment: If the monitoring component 23 detects wrinkles on the fabric surface, the leveling component 21 of the leveling mechanism 2 is activated to perform adaptive leveling. The lifting cylinder 212 at the top of the support plate 211 drives the lifting plate 213 to rise and fall, adjusting the leveling height according to the fabric thickness. The bidirectional synchronous cylinder 214 at the bottom of the lifting plate 213 drives the two moving seats 215 to slide horizontally, adjusting the horizontal expansion of the leveling to stretch the fabric surface. During the operation, the pressure sensor 216, buffer rod 217 and buffer structure inside the moving seat 215 make the leveling roller 218 flexibly fit the fabric surface, sense the leveling pressure in real time, adapt to the stretching characteristics of the polyester-cotton fabric, and avoid fabric stretching damage. At the same time, the limiting component 22 limits the horizontal sliding of the moving seat 215 to ensure stable operation of the leveling operation until the monitoring component 23 detects that the wrinkles on the fabric surface are eliminated and the flatness meets the standard, and then stops the leveling operation. S4. Color difference visual inspection: The fabric that has passed the wrinkle smoothing standard is continuously transported to the inspection agency area. The inspection agency 3 collects the front and back images of the smoothed polyester-cotton fabric. The equipment control system performs calculation and analysis on the collected image data, accurately identifies and calculates the color difference defect data of the fabric surface, and completes the online continuous color difference visual inspection of the polyester-cotton printed and dyed fabric.

[0035] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] During operation, the polyester-cotton printed fabric to be inspected is first conveyed horizontally and smoothly under the combined support of the conveying roller 6, the support roller 5 and the guide roller 8, ensuring that there is no deviation or sudden tension change in the fabric conveying process, providing regular operating conditions for subsequent inspection and leveling. After the fabric enters the working area of ​​the leveling mechanism 2, the laser emitter 233 and laser receiver 234 of the monitoring component 23 form a horizontal detection optical path, scanning the fabric surface in real time during the conveying process. By utilizing changes in optical path obstruction, they accurately identify flatness defects such as wrinkles and protrusions on the fabric surface, achieving pre-emptive non-destructive monitoring. When wrinkles are detected, the equipment automatically starts the leveling component 21, driving the lifting plate 213 downwards via the lifting cylinder 212 on top of the support plate 211. The leveling plate is adaptively adjusted according to the fabric thickness. The vertical working height of the flat roller allows the flattening roller 218 to fit against the fabric surface; at the same time, the bidirectional synchronous cylinder 214 at the bottom of the lifting plate 213 drives the two moving seats 215 to slide horizontally to opposite sides in sync, causing the flattening roller 218 to stretch the fabric laterally. When the two flattening rollers 218 slide to the maximum distance, the lifting cylinder 212 resets, so that the flattening roller 218 separates from the fabric surface. The bidirectional synchronous cylinder 214 then resets. After resetting, the above operation continues. After repeated operation, the flattening operation of the fabric surface is achieved. During the leveling process, the reaction force of the fabric on the leveling roller 218 is transmitted sequentially to the buffer rod 217 and the pressure sensor 216. With the flexible buffering effect of the buffer spring 4, the leveling and bonding pressure is fed back in real time and adaptively adjusted to avoid rigid compression causing stretching deformation and local damage to the polyester-cotton fabric. At the same time, the limiting components 22 on both sides of the lifting plate 213 precisely limit the horizontal sliding stroke of the moving seat 215 through the sliding cooperation of the limiting rod 221 and the limiting block 222, preventing sliding deviation and jamming, and ensuring the stability of the leveling operation. The leveling operation continues, and the monitoring component 23 performs real-time dynamic re-inspection until the fabric wrinkles are completely eliminated and the flatness meets the standard. The system automatically stops the leveling process, and the fabric is smoothly transported to the rear inspection mechanism 3 area. After entering the inspection station, the control cylinder 34 of the inspection mechanism 3, in conjunction with the linkage component 35, drives the upper and lower sets of equipment plates 33 to slide vertically synchronously along the positioning rod 32, adaptively adjusting the vertical spacing of the equipment plates 33 to match the current fabric thickness. At the same time, the adjustment motor 371 of the adjustment component 37 drives the adjustment rod 372 and the adjustment block 373 to rotate. As the adjustment block 373 rotates, it drives the transmission plate 91 and the transmission rods 93 on both sides and the sliding plate 374 to slide horizontally and slowly in a synchronous manner. The sliding of the sliding plate 374 will drive the corresponding mounting plate 375 on it. The two sets of industrial inspection cameras 38 slide slowly horizontally back and forth in sync to expand their horizontal shooting range. Then, the upper and lower supplementary lights 36 are turned on to build a uniform and stable standardized supplementary lighting detection optical path, eliminating interference from ambient light and fabric reflection. The industrial inspection cameras 38 simultaneously acquire high-definition images of the front and back of the fabric. The control system performs calculations, comparisons, and color difference analysis on the image data to accurately identify and calculate the color difference defect parameters of the fabric surface. Finally, the continuous, high-precision, and low-false-detection automated color difference visual inspection operation of polyester-cotton printed and dyed fabric is completed.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A color difference visual inspection device based on polyester-cotton fabric printing and dyeing processing, comprising a mounting base (1), characterized in that: The top of the mounting base (1) is provided with a leveling mechanism (2) and a detection mechanism (3) from left to right. The leveling mechanism (2) includes: The leveling assembly (21) includes a support plate (211) fixedly installed on the top left side of the mounting base (1). A lifting cylinder (212) is fixedly installed on the top of the support plate (211). A lifting plate (213) is fixedly installed on the piston end of the lifting cylinder (212). A bidirectional synchronous cylinder (214) is fixedly installed on the bottom surface of the lifting plate (213). A movable seat (215) is fixedly installed on the piston ends of both sides of the bidirectional synchronous cylinder (214). A pressure sensor (216) is fixedly installed on the top of the inner cavity of the movable seat (215). A buffer rod (217) is slidably connected inside the movable seat (215). The top end of the buffer rod (217) is fixedly connected to the detection end of the pressure sensor (216). A concave plate is fixedly installed on the bottom end of the buffer rod (217). A leveling roller (218) is rotatably connected to the inner side wall of the concave plate. Limiting components (22) are provided on both sides of the lifting plate (213) to limit the horizontal sliding of the movable seat (215); The monitoring component (23) is located on the side of the support plate (211) and is used to monitor the flatness of the polyester-cotton fabric.

2. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 1, characterized in that: A buffer spring (4) is sleeved on the outside of the buffer rod (217). The top end of the buffer spring (4) abuts against the bottom surface of the movable seat (215), and the bottom end of the buffer spring (4) abuts against the top surface of the concave plate.

3. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 1, characterized in that: The limiting component (22) includes limiting rods (221) fixedly installed on both sides of the lifting plate (213), and a limiting block (222) is slidably connected to the surface of the limiting rod (221). The side of the limiting block (222) is fixedly connected to the side of the moving seat (215).

4. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 1, characterized in that: The inner wall of the support plate (211) is rotatably connected to a support roller (5), which is located directly below the leveling roller (218). A conveying roller (6) is rotatably arranged on the left side of the support plate (211). A guide plate (7) is fixedly installed on the right side of the top of the mounting base (1). A guide roller (8) is rotatably connected to the inner side of the guide plate (7). The guide roller (8) and the support roller (5) are arranged horizontally.

5. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 1, characterized in that: The monitoring component (23) includes two sets of symmetrically arranged assembly plates (231). The surface of the assembly plate (231) is provided with an assembly groove. The assembly plate (231) is detachably connected to the side of the support plate (211) by an assembly screw (232). A laser emitter (233) and a laser receiver (234) are respectively fixedly installed at the ends of the two sets of assembly plates (231).

6. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 1, characterized in that: The detection mechanism (3) includes two sets of connecting plates (31) symmetrically and fixedly installed on the top of the mounting base (1). The inner sidewalls of the two sets of connecting plates (31) are vertically fixedly installed with positioning rods (32). The surfaces of the positioning rods (32) are vertically slidably provided with two sets of equipment plates (33). The inner side of the equipment plates (33) is fixedly installed with control cylinders (34). The piston end of the control cylinders (34) is fixedly connected to the bottom of the lower equipment plate (33). The two sets of equipment plates (33) achieve synchronous vertical sliding through the linkage component (35). The opposite surfaces of the two sets of equipment plates (33) are fixedly installed with supplementary lights (36). The industrial inspection camera (38) is driven to slide horizontally inside the equipment plate (33) through the adjustment component (37).

7. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 6, characterized in that: The linkage component (35) includes a linkage rod (351) rotatably mounted on the side of the upper and lower corresponding equipment plates (33) and a linkage plate (352) rotatably mounted on the side of the equipment plate (33). The two ends of the linkage plate (352) are respectively rotatably connected to one end of the upper and lower corresponding linkage rod (351).

8. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 6, characterized in that: The adjustment assembly (37) includes an adjustment motor fixedly installed on the top of the equipment plate (33). The output end of the adjustment motor (371) extends into the equipment plate (33) and is fixedly installed with an adjustment rod (372). An adjustment block (373) is fixedly installed at one end of the adjustment rod. The adjustment block (373) drives the sliding plate (374) to slide through the transmission assembly (9). The bottom of the sliding plate (374) extends out of the equipment plate (33) and is fixedly installed with an mounting plate (375). The bottom of the mounting plate (375) is detachably and fixedly connected to the industrial inspection camera (38).

9. The color difference visual detection device based on polyester-cotton fabric printing and dyeing processing according to claim 8, characterized in that: The transmission assembly (9) includes a transmission plate (91), and a transmission groove (92) is provided on the surface of the transmission plate (91). The inner surface of the transmission groove (92) is slidably engaged with the outer surface of the adjusting block (373). Transmission rods (93) are fixedly installed on the left and right sides of the transmission plate (91), and one end of the transmission rod (93) is fixedly connected to the side of the corresponding sliding plate (374).

10. A detection method for a color difference visual inspection device based on polyester-cotton fabric printing and dyeing processing, characterized in that, The color difference visual detection device according to any one of claims 1-9 includes the following steps: S1. Stable fabric conveying introduction: The polyester-cotton printed fabric to be tested travels along the equipment conveying path and is pre-received and conveyed by the leveling mechanism (2) on the mounting base (1), so that the polyester-cotton fabric maintains a stable straight conveying state, providing a stable and regular conveying operation basis for subsequent wrinkle monitoring, adaptive leveling and color difference visual detection. S2, Real-time monitoring of fabric folds: During the fabric conveying process, the monitoring component (23) of the leveling mechanism (2) is used to monitor the flatness and fold status of the polyester-cotton fabric in the conveying state in real time to determine whether there are fold defects on the fabric surface. S3. Adaptive Flexible Leveling Closed-Loop Adjustment: If the monitoring component (23) detects a wrinkle defect on the fabric surface, the leveling component (21) of the leveling mechanism (2) is activated to perform adaptive leveling operations; the lifting plate (213) is driven to rise and fall by the lifting cylinder (212) at the top of the support plate (211) to adjust the leveling height according to the fabric thickness; the moving seats (215) on both sides are driven to slide horizontally by the bidirectional synchronous cylinder (214) at the bottom of the lifting plate (213) to adjust the horizontal expansion of the leveling to stretch the fabric surface. During the operation, the pressure sensor (216), buffer rod (217) and buffer structure inside the moving seat (215) make the leveling roller (218) flexibly fit the fabric surface, sense the leveling pressure in real time, adapt to the stretching characteristics of polyester-cotton fabric, and avoid fabric stretching damage; at the same time, the horizontal sliding of the moving seat (215) is limited by the limiting component (22) to ensure the stable operation of the leveling operation until the monitoring component (23) detects that the fabric wrinkles are eliminated and the flatness meets the standard, and then the leveling operation stops. S4. Color difference visual inspection: The fabric that has been smoothed and meets the standards is continuously transported to the inspection agency area. The inspection agency (3) collects the front and back images of the smoothed polyester-cotton fabric. The equipment control system performs calculation and analysis on the collected image data, accurately identifies and calculates the color difference defect data of the fabric surface, and completes the online continuous color difference visual inspection of the polyester-cotton printed and dyed fabric.

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