CN-121974194-A - Comprehensive control method for preventing warping in production of multilayer polaroid coiled material

CN121974194ACN 121974194 ACN121974194 ACN 121974194ACN-121974194-A

Abstract

The application provides a comprehensive regulation and control method for preventing warping in production of a multilayer polaroid coiled material, which comprises the steps of obtaining surface deformation data and material thickness distribution information of the polaroid coiled material through a sensor array, constructing a warping model to generate a warping degree distribution map, obtaining local stress vector data from tension interaction position points, adopting a feedback control regulation method to modify winding tension parameters to obtain a regulated tension equilibrium state, obtaining coiled material flatness data in the tension equilibrium state through a real-time monitoring system, determining a regulation and control effect index, extracting deviation characteristic information if the regulation and control effect index does not reach the preset flatness standard, judging a Zhang Licai material layer needing to be further optimized, adopting a parameter optimization updating method to modify the tension parameters according to the tension material layer needing to be further optimized to obtain a dynamic regulation scheme, extracting optimization parameters from the dynamic regulation scheme, and applying the optimization parameters to a production flow to obtain stable coiled material flatness output.

Inventors

ZHAO SHE
XIONG WEI
Liang Shibiao

Assignees

东莞市溢彩科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260401

Claims (8)

1. A comprehensive regulation and control method for preventing warping in production of a multi-layer polaroid coiled material is characterized by comprising the steps of obtaining surface deformation data and material thickness distribution information of the polaroid coiled material through a sensor array, constructing a warping model to generate a warping degree distribution diagram, extracting boundary characteristics of the multi-layer material according to the warping degree distribution diagram, calculating tension value differences of all layers by a tension distribution simulation method to determine source material layers which cause warping, analyzing a tension propagation path by a mechanical propagation simulation method if the tension value differences of the source material layers exceed a preset threshold value, judging tension interaction position points affecting adjacent layers, obtaining local stress vector data from the tension interaction position points, modifying winding tension parameters by a feedback control adjustment method to obtain an adjusted tension equilibrium state, obtaining coiled material flatness data in the tension equilibrium state through a real-time monitoring system, comparing the coiled material flatness data with preset flatness standards, determining a regulation and control effect index, extracting deviation characteristic information if the regulation and control effect index does not reach the preset flatness standards, judging Zhang Licai material layers which need to be optimized further, obtaining tension parameters by a parameter optimization update method if the tension value differences of the source material layers are required, obtaining dynamic adjustment parameters, obtaining a dynamic adjustment scheme, modifying tension parameters by the dynamic adjustment scheme, and extracting optimized parameters from the dynamic adjustment scheme, and outputting the optimized production parameters.
2. The comprehensive regulation and control method for preventing warping in production of a multilayer polaroid coiled material according to claim 1, wherein the method for obtaining surface deformation data and material thickness distribution information of the polaroid coiled material through a sensor array and constructing a warping model to generate a warping degree distribution map comprises the steps of collecting an initial data set through the sensor array, carrying out feature extraction on the surface deformation data to determine deformation feature vectors, constructing the warping model according to the deformation feature vectors and the material thickness distribution information through a finite element analysis method, outputting a warping parameter matrix, and generating the warping degree distribution map according to the warping parameter matrix for subsequent multi-layer material boundary feature extraction.
3. The comprehensive regulation and control method for preventing warping in production of multilayer polaroid coiled material according to claim 1, wherein the method for extracting boundary characteristics of multilayer materials according to the warping degree distribution diagram is characterized in that a tension distribution simulation method is adopted to calculate tension value differences of all layers, the method comprises the steps of extracting boundary contour lines from the warping degree distribution diagram through an edge detection algorithm to obtain a boundary characteristic set, calculating tension values of all layers according to the boundary characteristic set by adopting the tension distribution simulation method in combination with interlayer thickness data to obtain a tension value matrix, determining interlayer tension differences according to the tension value matrix to generate a difference distribution diagram, fusing coiled material production speed data to adjust parameters of the boundary characteristic set to obtain an adjusted difference diagram, judging layers with the difference values exceeding a preset threshold value, and determining the source material layer.
4. The comprehensive regulation and control method for preventing warping in production of a multilayer polaroid coiled material according to claim 1, wherein if the tension value difference of the source material layer exceeds a preset threshold value, analyzing a tension propagation path through a mechanical propagation simulation method, wherein the method comprises the steps of obtaining the tension propagation path through the mechanical propagation simulation method to generate a propagation path set, adjusting path parameters aiming at the propagation path set by fusing production environment temperature data to obtain an adjusted path diagram, analyzing the tension influence distribution of an adjacent layer according to the adjusted path diagram, determining an influence distribution matrix, and extracting tension interaction position points from the influence distribution matrix for subsequent local stress analysis.
5. The method for comprehensively regulating and controlling the warping prevention in the production of the multilayer polaroid coiled material according to claim 1, wherein the method for obtaining local stress vector data from the tension interaction position point and modifying winding tension parameters by adopting a feedback control adjustment method comprises the steps of collecting the local stress vector data from the tension interaction position point, fusing a propagation path set to generate a vector data set, adjusting a path map according to the vector data set and environment temperature data, modifying the winding tension parameters by the feedback control adjustment method to obtain a modified parameter set, analyzing the influence of adjacent layers according to the modified parameter set, adjusting material layer interaction if a preset threshold is exceeded, and determining interlayer stress equilibrium distribution to obtain the adjusted tension equilibrium state.
6. The comprehensive regulation and control method for preventing warping in production of multilayer polaroid coiled materials, according to claim 1, is characterized in that coiled material flatness data in a tension equilibrium state are obtained through a real-time monitoring system and compared with preset flatness standards, the method comprises the steps of collecting the coiled material flatness data through the real-time monitoring system, fusing a propagation path set through a classification identification comparison method to obtain a local stress vector set, regulating an influence distribution matrix according to the local stress vector set and environment temperature data, determining interlayer stress distribution through weighting correction, extracting material layer interaction parameters from the interlayer stress distribution, iteratively correcting parameter values to obtain a correction parameter set, and judging a regulation and control effect index according to the correction parameter set and the preset flatness standards.
7. The method for comprehensively regulating and controlling warpage prevention in production of a multilayer polaroid coiled material according to claim 1, wherein if the regulating and controlling effect index does not reach the preset flatness standard, extracting deviation characteristic information comprises the steps of extracting the deviation characteristic information from classified identification output, fusing environment temperature data by adopting a local stress vector set regulating method to obtain interlayer stress distribution, acquiring material layer interaction parameters aiming at the interlayer stress distribution, modifying the influence of adjacent layers by iterative correction parameter values, determining the tension material layer needing further optimization, extracting a stress distribution optimizing path from the tension material layer needing further optimization, fusing a propagation path set, and obtaining a modified parameter set for subsequent parameter optimization.
8. The comprehensive regulation and control method for preventing warping in production of multilayer polaroid coiled materials according to claim 1, wherein the method for modifying tension parameters by adopting a parameter optimization updating method according to the tension material layers needing to be further optimized comprises the steps of obtaining interaction parameters from the tension material layers needing to be further optimized, fusing deviation characteristic information by an iterative correction value method, comparing deviation values with standard values one by one to obtain stress distribution regulation, extracting local stress fusion data according to the stress distribution regulation, combining environment temperature integration comparison modification parameters, determining feedback control regulation, fusing interlayer friction regulation and control information, solving updating coefficients by accumulating friction information and tension values, and modifying the tension parameters to obtain the dynamic regulation scheme.

Description

Comprehensive control method for preventing warping in production of multilayer polaroid coiled material Technical Field The invention relates to the technical field of information, in particular to a comprehensive control method for preventing warping in the production of a multilayer polaroid coiled material. Background The polarizer is an indispensable optical element in a liquid crystal display panel, and its quality is directly related to the merits of display effects, especially in high-end display devices. In the production process of the polaroid, the problem of coil warping becomes a great obstacle affecting the flatness and subsequent processing precision of the product, and if the problem is not solved, poor lamination and even product scrapping are caused, so that the development of the industry is seriously restricted. Currently, the processing method for the warping of the polaroid coiled material is mainly focused on simple reverse winding or replacing part of film layer materials, but the modes often neglect the complex cause behind the warping, and lack deep analysis of the root cause of the problem. More importantly, the characteristic difference between different film layers is difficult to consider in the treatment process of the traditional method, so that the treatment effect is often unstable, even the problem recurrences occur in the subsequent storage or processing, and the overall quality of the product cannot be fundamentally improved. In the field, the core technical difficulty is mainly focused on accurate judgment and targeted regulation of the warping cause. Firstly, the polaroid is formed by compounding a plurality of layers of different materials, the response degree of each layer of material to the tension is different, and if the stress of which layer of material cannot be accurately identified as a main source of warping, effective solving measures are difficult to formulate. Secondly, because of the tension interactions between the layers of material, if the ability to independently adjust the tension of each layer is lacking, the overall regulation tends to be out of phase, resulting in partial area stress imbalance. For example, in production, if the tension of the upper protective film is too high, the coil may warp upwards, and the tension of the lower release film may be insufficient, which may aggravate the problem, and the two forces are superimposed to make the warping direction and degree difficult to predict, so that the processing difficulty is doubled. Therefore, how to identify the specific source of warpage in real time in the production process and to perform accurate and independent dynamic adjustment on the tension of the multi-layer material becomes a key problem for improving the quality and the production efficiency of the polaroid coiled material. Disclosure of Invention The invention provides a comprehensive regulation and control method for preventing warping in the production of a multilayer polaroid coiled material, which mainly comprises the following steps: The method comprises the steps of obtaining surface deformation data and material thickness distribution information of a polaroid coiled material through a sensor array, constructing a warping model to generate a warping degree distribution diagram, extracting boundary characteristics of multiple layers of materials according to the warping degree distribution diagram, calculating tension value differences of all layers by a tension distribution simulation method, determining source material layers which cause warping, analyzing a tension propagation path by a mechanical propagation simulation method if the tension value differences of the source material layers exceed a preset threshold value, judging tension interaction position points affecting adjacent layers, obtaining local stress vector data from the tension interaction position points, modifying winding tension parameters by a feedback control adjustment method to obtain an adjusted tension equilibrium state, obtaining coiled material flatness data in the tension equilibrium state through a real-time monitoring system, comparing the coiled material flatness data with preset flatness standard to determine a regulating effect index, judging Zhang Licai material layers which need to be further optimized by adopting a parameter optimization update method if the regulating effect index does not reach the preset flatness standard, obtaining a dynamic adjustment scheme, extracting optimized parameters from the dynamic adjustment scheme, applying the optimized parameters to a production flow, and obtaining stable coiled material output. Further, the method comprises the steps of acquiring surface deformation data and material thickness distribution information of a polaroid coiled material through a sensor array, constructing a warping model to generate a warping degree distribution map, acquiring an initial data set through the sensor ar