HPE protective film material for automobiles and preparation method of HPE protective film material

Abstract

The invention relates to the technical field of preparation of HPE films, in particular to an HPE protective film material for an automobile and a preparation method of the HPE protective film material. The method comprises the following steps: acquiring a plurality of preset analysis points to determine an analysis point position feature set of the HPE blown film, and further determining a plurality of pieces of fuzzy thickness information; acquiring the outer diameter of a huffing die orifice, combining with an analysis point position feature set, determining a vibration feature data set, combining with a plurality of pieces of fuzzy thickness information, determining a plurality of real thicknesses, further determining thickness uniformity information, and determining a thickness adjustment strategy; analyzing a plurality of real thicknesses, determining thickness influence information, obtaining a light intensity information set, and determining vibration scattering information and vibration absorption information in combination with the vibration characteristic data set; on the basis, real light transmittance information is determined, and then a transparency adjustment strategy is determined; and adjusting the HPE blown film according to the thickness adjustment strategy and the transparency adjustment strategy. According to the method, the thickness uniformity and transparency of the HPE roll-bond film are effectively controlled and optimized.

Description

Technical Field

[0001] The present application relates to the technical field of HPE film preparation, and in particular to an HPE protective film material for automobiles and a preparation method thereof. Background Art

[0002] The HPE protective film material for automobiles is mainly based on high-performance highly chlorinated polyethylene (HPE). As a common protective material, HPE protective film has the characteristics of lightness, transparency, softness, and weather resistance. It is widely used in automobiles, electronic products, furniture and other fields. In the automotive industry, HPE protective film is often used to protect the body, windows, interior decoration and other parts of the car to prevent scratches and stains. With the continuous development of the automotive manufacturing industry, the performance requirements for HPE protective films are also getting higher and higher, such as higher tensile strength, better weather resistance and lower manufacturing costs.

[0003] During the preparation process of the HPE film, many factors influencing the preparation process will affect the thickness uniformity and transparency of the HPE film, making it difficult for the quality of the final HPE film to achieve an ideal effect. However, it is difficult for the existing technology to timely detect the impact of many factors on the thickness and transparency of the HPE film and make timely adjustments, which will affect the final effect of the HPE film, cause waste of the HPE film, and increase production costs. Summary of the invention

[0004] The present application provides an HPE protective film material for automobiles and a preparation method thereof to solve the above-mentioned problems.

[0005] In a first aspect, the present application provides an HPE protective film material for automobiles and a preparation method thereof, the method comprising: Acquire a plurality of preset analysis points, determine an analysis point position feature set of the HPE blown film according to the preset analysis points, and determine a plurality of fuzzy thickness information according to the analysis point position feature set; Obtaining an outer diameter of a blow die orifice, determining a vibration feature data set according to the outer diameter of the blow die orifice and the analysis point position feature set, analyzing the vibration feature data set and the plurality of fuzzy thickness information to determine a plurality of real thicknesses, determining thickness uniformity information according to the plurality of real thicknesses, and determining a thickness adjustment strategy according to the thickness uniformity information; Analyzing the plurality of real thicknesses to determine thickness influence information, acquiring a light intensity information set, analyzing the light intensity information set and the vibration characteristic data set to determine vibration scattering information and vibration absorption information; Analyze the thickness influence information, the vibration scattering information and the vibration absorption information to determine true light transmittance information, and determine a transparency adjustment strategy according to the true light transmittance information; The HPE blown film is adjusted according to the thickness adjustment strategy and the transparency adjustment strategy.

[0006] Through the above technical solution, several laser thickness gauges are used to detect several thicknesses under the influence of vibration. Taking into account the influence of vibration on the detection of thickness in detail, a data basis can be provided for the subsequent analysis and calculation of the real thickness. The vibration characteristics of the current HPE film can be judged by comparing with the outer diameter of the die mouth, which can obviously analyze the vibration characteristics of the HPE film and facilitate the subsequent calculation of the real thickness. By judging the thickness uniformity information of the film, a thickness adjustment strategy can be formulated in a targeted manner. By analyzing the vibration scattering information and vibration absorption information, the specific influence of vibration on the transparency of the film can be deeply understood, the accuracy of the calculation of the real transmittance can be improved, and a basis can be provided for the subsequent transparency optimization. By determining the real transmittance information, an effective transparency adjustment strategy can be formulated. The overall solution realizes the effective control and optimization of the thickness uniformity and transparency of the HPE blown film through precise measurement, scientific analysis and strategy formulation, and then through two adjustment strategies, timely adjustments can be made when abnormalities are found to obtain an HPE film consistent with the expected effect.

[0007] Optionally, the analysis point position feature set includes current outer surface position information and current inner surface position information at a plurality of analysis points, and determining a plurality of fuzzy thickness information according to the analysis point position feature set includes: Determine a number of current outer surface distances and current inner surface distances according to the current outer surface position information and the current inner surface position information at a number of analysis points; Determine a current fuzzy thickness corresponding to each analysis point according to the current outer surface distances and the current inner surface distances; The plurality of fuzzy thickness information are determined according to the plurality of current fuzzy thicknesses.

[0008] Through the above technical solution, by considering the vibration factor, this method can significantly reduce the thickness measurement error caused by vibration and improve the accuracy and reliability of the measurement. Through the synchronous measurement of multiple laser thickness gauges, the vibration state of the HPE film during the inflation process can be captured more comprehensively, and it will not be detected one-sidedly based on one point, making the overall result more convincing. The internal and external laser thickness gauges can obtain the position information of the inner and outer surfaces of the HPE film in real time, providing an accurate data basis for the calculation of the fuzzy thickness. The calculation results of the fuzzy thickness provide an important basis for the subsequent true thickness detection, and also make the subsequent true thickness detection closer to the true value.

[0009] Optionally, determining thickness uniformity information according to the plurality of real thicknesses includes: Determining a plurality of outer surface vibration characteristics according to the outer diameter of the blow die and a plurality of current outer surface position information; Determining the vibration feature data set according to the plurality of outer surface vibration features; Analyzing the vibration characteristic data set and the plurality of fuzzy thickness information to determine a plurality of thickness influencing parameters; determining the plurality of true thicknesses according to the plurality of thickness influencing parameters and the plurality of fuzzy thickness information; According to the plurality of actual thicknesses and the preset thickness range, it is judged whether the plurality of actual thicknesses are all within the preset thickness range, and the thickness uniformity information is determined according to the judgment result.

[0010] Through the above technical solution, with the outer diameter of the blowing die as a reference, the vibration state of the HPE film during the blowing process can be captured in real time, providing the necessary vibration information for the subsequent thickness influencing parameter calculation and the actual thickness calculation, thereby improving the measurement accuracy. The influence of vibration on thickness measurement is quantified, and the key parameters affecting thickness are extracted to provide the necessary correction factors for the calculation of the actual thickness to eliminate the error caused by vibration. Through the preset standard thickness range, sections with uneven thickness can be discovered in a timely manner, providing a basis for adjustment and optimization in the production process, and providing a reference for ensuring that the produced HPE film meets the quality requirements.

[0011] Optionally, analyzing the vibration characteristic data set and the plurality of fuzzy thickness information to determine a plurality of thickness influencing parameters includes: According to the preset analysis points, determining a number of analysis times at the preset analysis points; Determining a fuzzy thickness mean value according to the plurality of fuzzy thickness information; Determining a thickness error value according to the current fuzzy thickness and the fuzzy thickness mean; According to the thickness error value, the thickness influencing parameters, the analysis times, the preset analysis points and the fuzzy thickness mean, a thickness parameter fitting model is constructed, specifically the following fitting model: ; in, is the thickness error value, is the number of the preset analysis points, For the the current blur thickness of the analysis point, is the fuzzy thickness mean; For the The vibration amplitude of the analysis point, For the The vibration angular frequency of the analysis point, is the analysis time at the current analysis point, For the The vibration phase of each of the analysis points; Determining the optimal value of the vibration amplitude, the optimal value of the vibration angular frequency, and the optimal value of the vibration phase according to the thickness parameter fitting model; Determining the optimal value of the vibration amplitude, the optimal value of the vibration angular frequency, and the optimal value of the vibration phase as the plurality of thickness influencing parameters; The determining the plurality of true thicknesses according to the plurality of thickness influencing parameters and the plurality of fuzzy thickness information comprises: According to the current fuzzy thickness and the plurality of thickness influencing parameters at each analysis point, the plurality of true thicknesses are determined, specifically as follows: ; in, is the true thickness at the current analysis point, For the the current blur thickness of the analysis point, For the The optimal value of the vibration amplitude at each of the analysis points, For the The optimal value of the vibration angular frequency of each of the analysis points, is the number of analysis times, For the The optimal value of the vibration phase of each of the analysis points, is the preset measurement error.

[0012] Through the above technical solution, by calculating the mean of fuzzy thickness, a benchmark value is provided to evaluate the degree of deviation of each fuzzy thickness from the overall average level. The residual sum of squares between each current fuzzy thickness and the mean of fuzzy thickness is calculated to obtain the thickness error value, which quantifies the degree of deviation of each fuzzy thickness from the average value. The influence of large residuals on the thickness detection results is amplified by means of squares, which can more intuitively understand the influence of residuals on thickness detection results, so that the model pays more attention to those points with inaccurate predictions, provides important input data for constructing a thickness parameter fitting model, and helps determine the specific influence of vibration on thickness measurement. By fitting the model to obtain the optimal values ​​of each parameter, the influence of vibration on thickness measurement can be eliminated to the maximum extent, improving the accuracy and reliability of the measurement. Designing a formula to obtain several true thicknesses can make the true thickness data obtained more accurate and convincing.

[0013] Optionally, determining a thickness adjustment strategy according to the thickness uniformity information includes: If the thickness of the HPE blown film is uneven, a uniformity relationship model is constructed according to the thickness uniformity information, the preset thickness standard uniformity information and a plurality of preset abnormal influencing factors; Determining adjustment values ​​of several influencing factors according to the uniformity relationship model; The thickness adjustment strategy is determined according to the adjustment values ​​of the several influencing factors.

[0014] Through the above technical solution, a uniformity relationship model is constructed to express the relationship between the current uniformity deviation and several abnormal influencing factors, and several influencing factor adjustment values ​​can be clearly obtained, so that the influence mechanism of each factor on thickness uniformity can be intuitively understood. By determining several influencing factor adjustment values, a clear adjustment strategy can be obtained, and timely adjustments can be made to the parts with abnormal thickness to avoid causing more material loss and waste of resources, and to avoid other problems caused by improper parameter adjustment, thereby ensuring that the obtained thickness meets the expected effect.

[0015] Optionally, the preset several abnormal influencing factors include a blowing ratio and a gas flow rate, and the uniformity relationship model is constructed according to the thickness uniformity information, the preset thickness standard uniformity information and the preset several abnormal influencing factors, which is specifically the following relationship expression: ; in, is the blow-up ratio, is the gas flow rate, is the preset mold radius, is the preset material density, is the thickness uniformity information, is the preset thickness standard uniformity information.

[0016] Through the above technical scheme, by determining the degree of deviation of the current uniformity, the specific adjustment values ​​of the blowing ratio and the gas flow rate are obtained, which provides accurate adjustment objects and specific adjustment methods for the subsequent implementation of the adjustment strategy. Expressed in the form of a relational equation, it can intuitively show the specific impact of the influencing factors on uniformity.

[0017] Optionally, analyzing the plurality of real thicknesses to determine thickness impact information includes: Analyze the several true thicknesses to determine a mean true thickness; The current transmittance information is obtained, and the transmittance before the thickness affects is determined according to the current transmittance information, the fuzzy thickness mean, and the true thickness mean, which is specifically the following formula: ; in, is the fuzzy thickness mean, is the true thickness mean, is the preset thickness influence coefficient, It is the thickness that affects the front light transmittance, is the current transmittance information, is the preset attenuation adjustment factor; The transmittance before thickness influence and the current transmittance information are determined as the thickness influence information.

[0018] Through the above technical solution, by considering the impact of thickness change on transmittance and using the formula for correction, the transmittance detection error caused by thickness change can be significantly reduced. Taking into account the wrinkles caused by vibration and then the change in thickness, the final result is more reasonable, providing an operational basis for the subsequent calculation of the true transmittance.

[0019] Optionally, analyzing the light intensity information set and the vibration characteristic data set to determine the vibration scattering information and the vibration absorption information includes: Determining incident light intensity information, scattered light intensity information, and transmitted light intensity information according to the light intensity information set; Determining vibration scattering efficiency according to the incident light intensity information and the scattered light intensity information; Determining the vibration scattering information according to the vibration scattering efficiency; Determining vibration absorption efficiency according to the incident light intensity information and the transmitted light intensity information; The vibration absorption information is determined according to the vibration absorption efficiency.

[0020] Through the above technical scheme, the relationship between the incident light intensity and the transmitted light intensity and the scattered light intensity is calculated respectively to obtain the vibration absorption efficiency and the vibration scattering efficiency. It is possible to distinguish the two different effects of wrinkles on light scattering and absorption, and to quantitatively evaluate the specific impact of the HPE film vibration and the wrinkles caused by it on the transmittance detection. At the same time, it can provide an operational basis for the subsequent calculation of the transmittance before light loss.

[0021] Optionally, analyzing the thickness influence information, the vibration scattering information, and the vibration absorption information to determine the true transmittance information includes: The transmittance before light loss is determined according to the vibration scattering efficiency, the vibration absorption efficiency, the current transmittance information and the vibration characteristic data set, specifically the following formula: ; in, is the transmittance before the light loss, is the current transmittance information, is the preset wrinkle influence coefficient, is the vibration scattering efficiency, is the vibration absorption efficiency; According to the transmittance before light loss and the transmittance before thickness influence, the real transmittance is determined, which is specifically the following formula: ; in, is the true light transmittance, is the transmittance before the light loss, It is the thickness that affects the front light transmittance, is the preset light loss influence weight, It is the preset thickness that affects the weight; The real light transmittance information is determined according to the real light transmittance.

[0022] Through the above technical solution, the formula is used to eliminate the influence of light loss caused by wrinkles on transmittance, and then the transmittance before light loss is obtained, which can make the obtained result closer to the true value and have higher credibility. Through the form of formula, the specific influence of scattering and light absorption on transmittance can be intuitively displayed. By calculating the thickness influence weight and the light loss weight, the different influence weights of thickness and light loss on transmittance are obtained, and then the real transmittance without vibration influence is obtained. Through the preset weights, the contribution of these two factors to the real transmittance can be flexibly adjusted according to the actual situation. By using the weighted summation method, the error introduced by inaccurate measurement or incomplete consideration of a single factor can be better eliminated, and the detection accuracy of transmittance can be improved.

[0023] Optionally, determining a transparency adjustment strategy according to the real light transmittance information includes: According to the real light transmittance information and the preset light transmittance range, determining whether the real light transmittance information is within the preset light transmittance range; If the actual light transmittance information is not within the preset light transmittance range, determining transparency abnormality information according to the actual light transmittance information; Determining transparency influencing factors according to the transparency abnormality information; The transparency adjustment strategy is determined according to the transparency influencing factors.

[0024] Through the above technical solution, by presetting the transmittance range and comparing it with the actual transmittance, it is possible to discover abnormal transmittance and avoid continuing to produce HPE films that do not meet the requirements, which helps to reduce the waste of raw materials caused by transmittance that does not meet the requirements. By analyzing the factors affecting abnormal transparency, potential problems in the preparation process can be discovered. By formulating adjustment strategies, the preparation process can be optimized to improve the stability and consistency of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0026] Figure 1 A schematic diagram of an application scenario of an HPE protective film material for automobiles and a preparation method thereof provided in an embodiment of the present application; Figure 2 A flow chart of an HPE protective film material for automobiles and a method for preparing the same is provided in one embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0028] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0029] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0030] During the preparation process of the HPE film, many factors influencing the preparation process will affect the thickness uniformity and transparency of the HPE film, making it difficult for the quality of the final HPE film to achieve an ideal effect. However, it is difficult for the existing technology to timely detect the impact of many factors on the thickness and transparency of the HPE film and make timely adjustments, which will affect the final effect of the HPE film, cause waste of the HPE film, and increase production costs.

[0031] Based on this, the present application provides an HPE protective film material for automobiles and a preparation method thereof, and detects the thickness and transparency of the HPE film. Since the film will vibrate during the blowing process, the influence of the vibration on the thickness and transparency detection is quantified, and the real thickness and transparency after eliminating the influence are obtained, and then it is judged whether the real thickness and transparency meet the standards. If not, the thickness and transparency of the subsequent HPE film are changed through adjustment means to ensure that the HPE film prepared subsequently meets the expected effect, thereby achieving effective control and optimization of the thickness uniformity and transparency of the HPE blown film.

[0032] Figure 1 A schematic diagram of an application scenario provided in the present application, in the process of HPE film inflation, the method provided in the present application is applied to eliminate the influence of vibration on the thickness and transparency detection of the HPE film, so as to obtain accurate thickness and transparency, and then make appropriate adjustments based on the expected effect.

[0033] Specifically, the method provided in the present application is applied to any server, and the analysis point position feature set provided by the laser thickness gauge is obtained through the server, and the specific influence of vibration on thickness detection is analyzed, and then the real thickness after eliminating the influence of vibration is obtained, and then it is judged whether the real thickness is consistent with the expected thickness. If not, corresponding adjustments are made to ensure that the thickness of the HPE film obtained later is consistent with the expected thickness. Similarly, the light intensity information set provided by the thin film transmittance detector is obtained through the server, and the specific influence of vibration on transmittance detection is analyzed, and then the real transmittance after eliminating the influence of vibration is obtained, and then it is judged whether the real transmittance is consistent with the expected transmittance. If not, corresponding adjustments are made to ensure that the transmittance of the HPE film obtained later is consistent with the expected transmittance. Through precise measurement, scientific analysis and strategy formulation, effective control and optimization of the thickness uniformity and transparency of the HPE inflation film are achieved, and then through two adjustment strategies, timely adjustments can be made when abnormalities are found to obtain HPE films consistent with the expected effects.

[0034] For specific implementation methods, please refer to the following embodiments.

[0035] Figure 2 This is a flow chart of an HPE protective film material for automobiles and a preparation method thereof provided in an embodiment of the present application. The method of this embodiment can be applied to the server in the above scenario. Figure 2 As shown, the method includes: S201, obtaining a plurality of preset analysis points, determining an analysis point position feature set of an HPE blown film according to the plurality of preset analysis points, and determining a plurality of fuzzy thickness information according to the analysis point position feature set.

[0036] The preset plurality of analysis points may be preset plurality of analysis points located on the surface of the HPE membrane for analyzing the vibration of the HPE membrane.

[0037] The analysis point position feature set may be a set of position features of the inner and outer surfaces of the HPE membrane obtained at a number of analysis points.

[0038] The fuzzy thickness information may be thickness information measured at a plurality of analysis points under the influence of vibration.

[0039] Specifically, during the inflation of the HPE film, the high-pressure gas rapidly expands inside the film bubble, generating strong impact and tensile forces on the film bubble wall, which in turn causes the HPE film to vibrate, and thus there is an error in the thickness detection of the film, resulting in the thickness initially detected being the thickness affected by the vibration, and it is necessary to analyze based on this thickness. Therefore, several analysis points are preset, and several laser thickness gauges are evenly set inside and outside the HPE film bubble, and the motion states of several laser thickness gauges are set as follows: move upward with the pulling speed of the film bubble, and return to the first analysis point after the detection of the last analysis point is completed. Each thickness gauge detects the film bubble at the preset analysis point, obtains different features at several analysis points, and then obtains the analysis point position feature set. By analyzing the position feature at the current analysis point, the thickness at the current analysis point is obtained. Since the HPE film at this time is affected by the vibration, the obtained thickness is inaccurate, so the thickness at this time is used as fuzzy thickness information. Similarly, several fuzzy thickness information can be obtained by combining the analysis point position feature set.

[0040] S202, obtaining the outer diameter of the blowing die orifice, determining a vibration feature data set based on the outer diameter of the blowing die orifice and an analysis point position feature set, analyzing the vibration feature data set and a number of fuzzy thickness information, determining a number of real thicknesses, determining thickness uniformity information based on the several real thicknesses, and determining a thickness adjustment strategy based on the thickness uniformity information.

[0041] The outer diameter of the blowing die may be the outer diameter of the die during the blowing film forming process of the HPE film.

[0042] The vibration feature data set may be a data set that uses the analysis point feature set to reflect the vibration features of the HPE film surface.

[0043] The plurality of real thicknesses may be the real thicknesses of the HPE film at the position where the analysis point corresponding to each laser thickness gauge is located and is not affected by vibration.

[0044] Thickness uniformity information can be information on whether the thickness is uniform in the current analysis period. The analysis period is the time period from the lowest point to the highest point when the laser thickness gauge moves upward with the pulling speed of the film bubble.

[0045] The thickness adjustment strategy may be an adjustment strategy for adjusting the uniformity of the thickness of the HPE film when non-uniformity of the thickness of the HPE film is detected.

[0046] Specifically, during the inflation process of the HPE film, the HPE film will be affected by vibration, which will cause the thickness of the film to be uneven, and the HPE film that meets the requirements cannot be obtained. If the uneven thickness is not discovered in time and timely adjustments are made, the HPE film will be greatly wasted. Therefore, the outer diameter of the die for inflating the HPE film is obtained. In the absence of vibration, since the inflation ratio is unchanged without human intervention, the ratio between the outer diameter of the HPE film and the outer diameter of the die is unchanged, and the standard outer diameter position feature can be obtained. After being affected by vibration, the position feature of the film detected at each analysis point is compared with the standard outer diameter position feature to obtain the change feature of the HPE film caused by vibration at each analysis point, and then obtain the vibration feature data set. Through mathematical analysis, the vibration feature data set and several fuzzy thickness information are analyzed to obtain several real thicknesses, and it is judged whether the several real thicknesses are within the thickness range required by the HPE film product, and then the thickness uniformity information is determined. According to the thickness uniformity information, the corresponding adjustment value is obtained through mathematical analysis, and then the thickness adjustment strategy is obtained.

[0047] S203, analyzing several real thicknesses, determining thickness influence information, obtaining a light intensity information set, analyzing the light intensity information set and a vibration characteristic data set, and determining vibration scattering information and vibration absorption information.

[0048] The thickness impact information may be information on the impact of the thickness on the light transmittance of the HPE film.

[0049] The light intensity information set may be an information set obtained by detecting light intensity information using a thin film transmittance detector.

[0050] The vibration scattering information may be information about the influence of light transmittance on light transmittance due to light intensity scattering caused by the vibration of the HPE film when the light transmittance is detected.

[0051] The vibration absorption information may be information that, when the light transmittance of the HPE film is detected, the wrinkles caused by the vibration of the HPE film partially absorb light and thus affect the light transmittance.

[0052] Specifically, during the inflation process of the HPE film, the HPE film will be affected by vibration, resulting in wrinkles on the surface of the HPE film. These wrinkles will scatter and absorb the detection light emitted by the film transmittance detector, thereby affecting the transparency detection of the HPE film. Therefore, several real thicknesses are analyzed by mathematical analysis to obtain information on the influence of thickness on the transmittance of the HPE film. The transmittance of the HPE film is detected by a film transmittance detector, and several light intensity information is extracted to obtain a light intensity information set. The light intensity information set and the vibration characteristics in the vibration characteristic set are analyzed to obtain the scattering effect of the wrinkles caused by vibration on the detection light, thereby affecting the accuracy of the transmittance detection, and the absorption effect of the wrinkles on part of the detection light, thereby affecting the accuracy of the transmittance detection.

[0053] S204, analyzing the thickness influence information, the vibration scattering information and the vibration absorption information to determine the real light transmittance information, and determining the transparency adjustment strategy according to the real light transmittance information.

[0054] The real transmittance information may be the transmittance information of the HPE film without the influence of vibration.

[0055] The transparency adjustment policy may be a policy that aims to adjust the transparency to a desired range.

[0056] Specifically, during the inflation process of the HPE film, the HPE film will be affected by vibration, resulting in wrinkles on the surface of the HPE film. These wrinkles will scatter and absorb the detection light, thereby affecting the transparency detection of the HPE film. However, since the automotive HPE film will be used in car lights, it will have high requirements for the transparency of the film, and it is necessary to make timely adjustments when abnormalities occur to avoid the HPE film effect not meeting the standards, thereby causing waste. Therefore, through mathematical analysis, the thickness influence information, vibration scattering information and vibration absorption information are analyzed to determine the HPE film transmittance information without vibration, and then judge whether the transmittance information meets the preset requirements. If not, make corresponding adjustments.

[0057] S204: adjusting the HPE blown film according to the thickness adjustment strategy and the transparency adjustment strategy.

[0058] Specifically, based on the thickness adjustment strategy and transparency adjustment strategy, combined with historical data experience, appropriate adjustments are made to the blowing equipment and improvements are made to the corresponding processes so that the subsequent HPE film transmittance can meet the demand.

[0059] Through the method provided in this embodiment, several laser thickness gauges are used to detect several thicknesses under the influence of vibration. Taking into account in detail the influence of vibration on the detection of thickness, a data basis can be provided for the subsequent analysis and calculation of the true thickness. The vibration characteristics of the current HPE film are judged by comparing with the outer diameter of the die mouth, and the vibration characteristics of the HPE film can be clearly analyzed, which facilitates the subsequent calculation of the true thickness. By judging the thickness uniformity information of the film, a thickness adjustment strategy can be formulated in a targeted manner. By analyzing the vibration scattering information and the vibration absorption information, the specific influence of vibration on the transparency of the film can be deeply understood, the accuracy of the calculation of the true transmittance can be improved, and a basis for the subsequent transparency optimization can be provided. By determining the real transmittance information, an effective transparency adjustment strategy can be formulated. The overall solution realizes the effective control and optimization of the thickness uniformity and transparency of the HPE inflation film through precise measurement, scientific analysis and strategy formulation, and then through two adjustment strategies, timely adjustments can be made when abnormalities are found to obtain an HPE film consistent with the expected effect.

[0060] In some embodiments, the analysis point position feature set includes current outer surface position information and current inner surface position information at several analysis points, and several current outer surface distances and current inner surface distances are determined based on the current outer surface position information and current inner surface position information at several analysis points; the current fuzzy thickness corresponding to each analysis point is determined based on the several current outer surface distances and the current inner surface distances; and some fuzzy thickness information is determined based on the several current fuzzy thicknesses.

[0061] The current outer surface position information may be position information of the outer surface of the HPE film detected at the current analysis point.

[0062] The current inner surface position information may be position information of the inner surface of the HPE film detected at the current analysis point.

[0063] The current outer surface distance may be the distance between the laser thickness gauge and the outer surface of the HPE film at the current analysis point.

[0064] The current inner surface distance may be the distance between the laser thickness gauge and the inner surface of the HPE film at the current analysis point.

[0065] The current fuzzy thickness may be the thickness detected under the influence of vibration at the current analysis point.

[0066] Specifically, during the inflation of the HPE film, the HPE film will vibrate under the influence of factors such as high-pressure gas, which will lead to errors in the thickness detection of the film, resulting in the thickness initially detected being the thickness affected by the vibration. In order to facilitate the subsequent detection of the true thickness, it is necessary to determine the fuzzy thickness. Therefore, through a number of laser thickness gauges evenly arranged inside and outside the HPE film bubble, a number of outer surface position information and inner surface position information are detected, and the distance between the laser thickness gauge and the outer surface of the HPE film at the current analysis point and the distance between the internal laser thickness gauge and the inner surface of the HPE film at the current analysis point are calculated to obtain the current outer surface distance and the current inner surface distance. The two are added to obtain the distance sum, and combined with the distance between the internal and external laser thickness gauges of the HPE film bubble, the total distance between the internal and external laser thickness gauges is subtracted from the sum of the current outer surface distance and the current inner surface distance to obtain the distance sum, and the distance difference is obtained. This distance difference is used as the current fuzzy thickness, and then corresponding calculations are performed on other analysis points to obtain some fuzzy thickness information.

[0067] Through the method provided by this embodiment, by considering the vibration factor, the method can significantly reduce the thickness measurement error caused by vibration and improve the accuracy and reliability of the measurement. Through the synchronous measurement of multiple laser thickness gauges, the vibration state of the HPE film during the inflation process can be captured more comprehensively, and it will not be detected one-sidedly based on one point, making the overall result more convincing. The internal and external laser thickness gauges can obtain the position information of the inner and outer surfaces of the HPE film in real time, providing an accurate data basis for the calculation of the fuzzy thickness. The calculation result of the fuzzy thickness provides an important basis for the subsequent true thickness detection, and also makes the true thickness of the subsequent detection closer to the true value.

[0068] In some embodiments, a number of outer surface vibration characteristics are determined based on the outer diameter of the blowing die and a number of current outer surface position information; a vibration characteristic data set is determined based on the number of outer surface vibration characteristics; a number of thickness influencing parameters are determined by analyzing the vibration characteristic data set and a number of fuzzy thickness information; a number of real thicknesses are determined based on the number of thickness influencing parameters and a number of fuzzy thickness information; based on a number of real thicknesses and a preset thickness range, it is judged whether a number of real thicknesses are within a preset thickness range, and thickness uniformity information is determined based on the judgment result.

[0069] The plurality of outer surface vibration characteristics may be vibration characteristics of the outer surface under the influence of vibration at a plurality of analysis points.

[0070] The plurality of thickness influencing parameters may be a plurality of parameters that may affect the thickness detection due to vibration.

[0071] The preset thickness range may be a preset qualified thickness range required for HPE film products.

[0072] Specifically, during the inflation process of the HPE film, the HPE film will vibrate under the influence of factors such as high-pressure gas, which will affect the detection of the HPE film thickness, and then affect the uniformity of the thickness. Ensuring the uniformity of the thickness is one of the key factors to determine whether the prepared HPE film can be put into use. Therefore, the distance between the outer surface of the film bubble and the outer diameter of the blowing die is obtained by an external laser thickness gauge, and several vibration characteristics are obtained with reference to the outer diameter of the blowing die, and then a vibration characteristic data set is obtained. The vibration characteristic data set and several fuzzy thickness information are analyzed by mathematical analysis to obtain several thickness influencing parameters, and then according to the obtained several thickness influencing parameters and several fuzzy thickness information, several real thicknesses without vibration influence are calculated by mathematical analysis. The obtained real thickness is compared with the preset standard thickness range to determine whether the several real thicknesses are all within the preset thickness range. If they are, it means that the obtained real thicknesses meet the requirements, and the HPE film thickness from the last analysis point in this analysis cycle to the first analysis point in the next analysis cycle is uniform. If there is a real thickness that is not within the range, it means that the HPE film thickness of this cycle is uneven.

[0073] Through the method provided in this embodiment, with the outer diameter of the blowing die as a reference, the vibration state of the HPE film during the blowing process can be captured in real time, providing necessary vibration information for subsequent thickness influencing parameter calculations and true thickness calculations, thereby improving the accuracy of the measurement. The influence of vibration on thickness measurement is quantified, and the key parameters affecting thickness are extracted, providing necessary correction factors for the calculation of true thickness to eliminate the error caused by vibration. Through the preset standard thickness range, sections with uneven thickness can be discovered in a timely manner, providing a basis for adjustment and optimization in the production process, and providing a reference for ensuring that the produced HPE film meets quality requirements.

[0074] In some embodiments, according to a plurality of preset analysis points, a plurality of analysis times under the preset analysis points are determined; according to a plurality of fuzzy thickness information, a fuzzy thickness mean is determined; according to the current fuzzy thickness and the fuzzy thickness mean, a thickness error value is determined; according to the thickness error value, a plurality of thickness influencing parameters, a plurality of analysis times, a plurality of preset analysis points and the fuzzy thickness mean, a thickness parameter fitting model is constructed, which is specifically the following fitting model (1): (1); in, is the thickness error value, To preset the number of analysis points, For the The current fuzzy thickness of the analysis point, is the mean value of fuzzy thickness; For the The vibration amplitude of each analysis point, For the The vibration angular frequency of the analysis point, is the analysis time at the current analysis point, For the The vibration phase of each analysis point is determined; according to the thickness parameter fitting model, the optimal value of the vibration amplitude, the optimal value of the vibration angular frequency and the optimal value of the vibration phase are determined; the optimal value of the vibration amplitude, the optimal value of the vibration angular frequency and the optimal value of the vibration phase are determined as several thickness influencing parameters; according to the current fuzzy thickness at each analysis point and several thickness influencing parameters, several real thicknesses are determined, which are specifically the following formula (2): (2); in, is the true thickness at the current analysis point, For the The current fuzzy thickness of the analysis point, For the The optimal value of the vibration amplitude at each analysis point is For the The optimal value of the vibration angular frequency of the analysis point is For some analysis time, For the The optimal value of the vibration phase at each analysis point is: is the preset measurement error.

[0075] The several analysis times may be analysis times at several analysis points.

[0076] The fuzzy thickness average value may be a thickness average value obtained by calculating a plurality of fuzzy thicknesses.

[0077] The thickness error value may be a thickness difference between the current fuzzy thickness and the fuzzy thickness mean.

[0078] The thickness parameter fitting model may be a model for fitting several thickness-influencing parameters.

[0079] The vibration amplitude may be the maximum height of the HPE film surface vibration when the HPE film is affected by vibration, and is a parameter that needs to be fitted.

[0080] The vibration angular frequency can be the angular change of the vibration per unit time, and is a parameter that needs to be fitted.

[0081] The vibration phase may represent the position of the HPE membrane relative to the standard outer diameter position feature at the current analysis point, and is a parameter that needs to be fitted.

[0082] The optimal value of the vibration amplitude may be the optimal value of the vibration amplitude obtained through fitting.

[0083] The optimal value of the vibration angular frequency may be the optimal value of the vibration angular frequency obtained through fitting.

[0084] The optimal value of the vibration phase may be the optimal value of the fitted vibration phase.

[0085] The preset measurement error may be a preset constant used to reduce the influence of the actual thickness calculation error, and may be determined through historical thickness detection data.

[0086] Specifically, according to a plurality of preset analysis points, the current time under the plurality of analysis points is determined, and according to the plurality of obtained fuzzy thicknesses, the average value thereof is obtained by calculation and determined as the fuzzy thickness mean value, and the residual sum of squares between the current fuzzy thickness and the fuzzy thickness mean value is calculated, and the residual sum of squares is used as the thickness error value, and then according to the thickness error value obtained above, a plurality of thickness influencing parameters, a plurality of analysis times, a plurality of preset analysis points and the fuzzy thickness mean value, a thickness parameter fitting model (1) is constructed to fit the optimal values ​​of the vibration amplitude, the vibration angular frequency and the vibration phase, wherein a sine expression is used to simulate the vibration law of the HPE film, It is used to calculate the square of residuals. The square can ensure that all residuals are positive numbers and amplify the impact of residuals on thickness test results, which can more intuitively understand the impact of residuals on thickness test results. It is used to indicate that each analysis point is traversed and the residual square data at each analysis point is summed. The optimal values ​​of the above vibration amplitude, vibration angular frequency, and vibration phase are determined as several thickness influencing parameters, and finally the actual thickness at several current analysis points is calculated by designing formula (2), where: Represents the vibration law of the HPE membrane.

[0087] Through the method provided by this embodiment, by calculating the fuzzy thickness mean, a benchmark value is provided to evaluate the degree of deviation of each fuzzy thickness from the overall average level. The residual sum of squares between each current fuzzy thickness and the fuzzy thickness mean is calculated to obtain the thickness error value, which quantifies the degree of deviation of each fuzzy thickness from the average value. The influence of the residual on the thickness detection result is amplified by means of squares, which can more intuitively understand the influence of the residual on the thickness detection result, so that the model pays more attention to those points with inaccurate predictions, provides important input data for constructing a thickness parameter fitting model, and helps determine the specific influence of vibration on thickness measurement. By fitting the model to obtain the optimal value of each parameter, the influence of vibration on thickness measurement can be eliminated to the greatest extent, thereby improving the accuracy and reliability of the measurement. Designing a formula to obtain several true thicknesses can make the true thickness data obtained more accurate and convincing.

[0088] In some embodiments, if the thickness of the HPE blown film is uneven, a uniformity relationship model is constructed based on thickness uniformity information, preset thickness standard uniformity information and preset several abnormal influencing factors; according to the uniformity relationship model, several influencing factor adjustment values ​​are determined; according to the several influencing factor adjustment values, a thickness adjustment strategy is determined.

[0089] The preset thickness standard uniformity information may be preset thickness uniformity standard information, which is used to compare with the thickness uniformity information to determine the current uniformity deviation degree.

[0090] The preset abnormal influencing factors may be preset factors that may affect the thickness of the HPE film during the HPE film preparation process.

[0091] The uniformity relationship model may be a model for expressing the relationship between the uniformity deviation degree and a plurality of preset abnormal influencing factors.

[0092] The several influencing factor adjustment values ​​may be specific adjustment values ​​for adjusting the several influencing factors.

[0093] Specifically, in the preparation process of HPE film, due to the complexity of the preparation process, improper handling of a certain link or a certain parameter will cause the thickness of the obtained HPE film to deviate from the preset effect. Therefore, the thickness uniformity information is compared with the set thickness standard uniformity information to determine the difference between the two. Then, combined with several preset abnormal influencing factors, a uniformity relationship model is constructed to express the relationship between the current uniformity deviation degree and several abnormal influencing factors, and then several influencing factor adjustment values ​​are obtained, and finally the thickness adjustment strategy is determined.

[0094] By means of the method provided in this embodiment, a uniformity relationship model is constructed to express the relationship between the current uniformity deviation degree and several abnormal influencing factors, and several influencing factor adjustment values ​​can be clearly obtained, so that the influence mechanism of each factor on thickness uniformity can be intuitively understood. By determining several influencing factor adjustment values, a clear adjustment strategy can be obtained, and timely adjustments can be made to the parts with abnormal thickness to avoid causing more material loss and waste of resources, and to avoid other problems caused by improper parameter adjustment, thereby ensuring that the obtained thickness meets the expected effect.

[0095] In some embodiments, a uniformity relationship model is constructed based on thickness uniformity information, preset thickness standard uniformity information, and preset abnormal influencing factors, specifically the following relationship expression (3): (3); in, is the inflation ratio, is the gas flow rate, is the preset mold radius, is the preset material density, is the thickness uniformity information, It is the preset thickness standard uniformity information.

[0096] Several abnormal influencing factors are preset including the inflation ratio and the gas flow rate.

[0097] The preset die radius may be the radius of the die opening for blowing the HPE film.

[0098] The blow-up ratio may be the ratio of the diameter of the film bubble to the diameter of the die.

[0099] The gas flow rate may be the flow rate of the gas used for inflation.

[0100] The preset material density may be a density determined according to the properties of different materials themselves.

[0101] Specifically, the degree of thickness uniformity deviation from the standard uniformity and the influence of the blowing ratio, gas flow rate, mold radius and material density are considered, where the blowing ratio and gas flow rate are adjustable, while the preset mold radius and preset material density are constant, and then expression (3) is designed to clearly express the relationship. Expresses the degree to which the current thickness uniformity deviates from the standard uniformity. When the value of Solving it, we can get and The value of is the adjustment value of the blowing ratio and flow rate. This value is the value that the corresponding parameter needs to be adjusted, and then the thickness adjustment strategy is obtained.

[0102] Through the method provided in this embodiment, by determining the degree of deviation of the current uniformity, specific adjustment values ​​of the blowing ratio and the gas flow rate are obtained, providing accurate adjustment objects and specific adjustment methods for the subsequent implementation of the adjustment strategy. Expressing it in the form of a relational equation can intuitively demonstrate the specific impact of the influencing factors on uniformity.

[0103] In some embodiments, several real thicknesses are analyzed to determine the real thickness average; current transmittance information is obtained, and transmittance before thickness influence is determined according to the current transmittance information, the fuzzy thickness average and the real thickness average, which is specifically the following formula (4): (4); in, is the fuzzy thickness mean, is the true mean thickness, is the preset thickness influence coefficient, It is the thickness that affects the front transmittance. is the current transmittance information, is a preset attenuation adjustment coefficient; the transmittance before thickness influence and the current transmittance information are determined as thickness influence information.

[0104] The true thickness average value may be a thickness average value obtained by calculating a plurality of true thicknesses.

[0105] The current transmittance information may be the transmittance information at the current analysis time point.

[0106] The transmittance before thickness influence may be the transmittance before the HPE film is influenced by the thickness variation caused by vibration.

[0107] The preset thickness influence coefficient may be the influence of the preset thickness on the transmittance, and the preset thickness influence coefficient may be obtained by fitting and analyzing the historical thickness and transmittance change data through a data fitting algorithm, such as a linear fitting algorithm.

[0108] The preset attenuation adjustment coefficient can be a preset coefficient for adjusting the attenuation rate of the effect of thickness change caused by vibration on transmittance. The preset attenuation adjustment coefficient can be obtained by fitting and analyzing the thickness change and transmittance change data caused by historical vibration through a data fitting algorithm, such as an exponential fitting algorithm.

[0109] The thickness influence information may be information combining the transmittance before the thickness influence and the current transmittance.

[0110] Specifically, during the preparation of the HPE film, the transmittance of the HPE film needs to be tested to determine whether the current transmittance of the film meets the requirements. However, since the HPE film will vibrate, the thickness of the current film will change relatively, which will lead to inaccurate transmittance detection. Therefore, several real thicknesses are analyzed to obtain the average of the real thicknesses. The transmittance of the HPE film is tested by a thin film transmittance detector to obtain the current transmittance. The transmittance before thickness influence is obtained by designing formula (4) based on the current transmittance information, the fuzzy thickness average and the real thickness average. Used to indicate thickness differences caused by vibrations, Is used to indicate the difference in thickness and the preset coefficients ( and ) to correct the transmittance, and the adjustment items are based on The size, sign, and coefficient of and To adjust the value , and finally the information of transmittance before thickness influence and current transmittance is determined as thickness influence information.

[0111] Through the method provided in this embodiment, by considering the impact of thickness change on transmittance and using formulas for correction, the transmittance detection error caused by thickness change can be significantly reduced. Taking into account the wrinkles caused by vibration and then the change in thickness, the final result is more reasonable, providing an operational basis for the subsequent calculation of the true transmittance.

[0112] In some embodiments, based on the light intensity information set, the incident light intensity information, scattered light intensity information and transmitted light intensity information are determined; based on the incident light intensity information and the scattered light intensity information, the vibration scattering efficiency is determined; based on the vibration scattering efficiency, the vibration scattering information is determined; based on the incident light intensity information and the transmitted light intensity information, the vibration absorption efficiency is determined; based on the vibration absorption efficiency, the vibration absorption information is determined.

[0113] The incident light intensity information may be light intensity information emitted by a thin film transmittance detector when performing transmittance detection.

[0114] The scattered light intensity information may be light intensity information of scattered light loss on the HPE film when a thin film transmittance detector performs transmittance detection.

[0115] The transmitted light intensity information may be light intensity information of a translucent HPE film when a thin film transmittance detector performs transmittance detection.

[0116] The vibration scattering efficiency may be the efficiency of light intensity scattering caused by the vibration of the HPE film.

[0117] The vibration absorption efficiency can be the efficiency of light intensity absorption by the wrinkles caused by the vibration of the HPE film.

[0118] The vibration scattering information may be information on the intensity of light scattering caused by the vibration of the HPE film.

[0119] The vibration absorption information may be information about the light absorption intensity of the wrinkles caused by the vibration of the HPE film.

[0120] Specifically, during the preparation of the HPE film, the transmittance of the HPE film needs to be tested to determine whether the current transmittance of the film meets the requirements. However, various factors will cause the HPE film to vibrate, and then there will be wrinkles on the surface of the HPE film. These wrinkles will scatter and absorb the detection light emitted by the film transmittance detector, which will affect the transmittance detection. Therefore, the Ganji transmittance meter is used to detect the incident light intensity information, scattered light intensity information and transmitted light intensity information, and the vibration scattering efficiency is obtained by calculating the ratio of the scattered light intensity to the incident light intensity, and the difference between the incident light intensity and the transmitted light intensity is calculated. The ratio of the difference to the incident light intensity is calculated to obtain the vibration absorption efficiency, and the vibration scattering efficiency and the vibration absorption efficiency are used as the vibration scattering information and the vibration absorption information, respectively.

[0121] Through the method provided in this embodiment, the relationship between the incident light intensity and the transmitted light intensity and the scattered light intensity is calculated respectively to obtain the vibration absorption efficiency and the vibration scattering efficiency, which can distinguish the two different effects of wrinkles on light scattering and absorption, and can quantitatively evaluate the specific impact of HPE film vibration and the wrinkles caused by it on transmittance detection, and at the same time provide an operational basis for the subsequent calculation of transmittance before light loss.

[0122] In some embodiments, the transmittance before light loss is determined according to the vibration scattering efficiency, the vibration absorption efficiency, the current transmittance information and the vibration characteristic data set, specifically the following formula (5): (5); in, is the transmittance before light loss, is the current transmittance information, is the preset wrinkle influence coefficient, is the vibration scattering efficiency, is the vibration absorption efficiency; the actual transmittance is determined based on the transmittance before light loss and the transmittance before thickness influence, which is specifically the following formula (6): (6); in, is the true light transmittance, is the transmittance before light loss, It is the thickness that affects the front transmittance. is the preset light loss influence weight, It is the preset thickness influence weight; according to the actual transmittance, the actual transmittance information is determined.

[0123] The transmittance before light loss may be the transmittance without the influence of wrinkles caused by vibration on the transmittance.

[0124] The preset wrinkle influence coefficient may be a coefficient of influence of preset wrinkle geometric features (such as wrinkle width and depth) on transmittance. The preset wrinkle influence coefficient may be obtained by fitting and analyzing historical wrinkle geometric features and transmittance change data through a data fitting algorithm, such as a nonlinear fitting algorithm.

[0125] The true light transmittance may be the light transmittance without the influence of thickness and light loss.

[0126] The preset light loss impact weight may be an impact weight of the preset light loss on the actual light transmittance, which may be obtained through the impact of historical light loss on the light transmittance.

[0127] The preset thickness influence weight may be a preset weight of influence of thickness change caused by vibration on actual transmittance, which may be obtained through the influence of historical thickness on transmittance.

[0128] Specifically, during the preparation of the HPE film, the transmittance of the HPE film needs to be tested to determine whether the current transmittance of the film meets the requirements. However, various factors can cause the HPE film to vibrate, which in turn causes changes in thickness and wrinkles. Both types of changes will affect the detection of transmittance. It is necessary to eliminate the influence of these two factors to obtain the true transmittance. Therefore, based on the vibration scattering efficiency in the vibration scattering information, the vibration absorption efficiency in the vibration absorption information, and the current transmittance, and considering the influence of wrinkles on transmittance, formula (5) is designed to obtain the transmittance before light loss, where: represents the total loss efficiency of folds caused by vibration under the influence of some geometric characteristics of the folds, , which represents the proportion of light that is not lost due to vibration and wrinkles. This formula is calculated by Divide by the proportion of light not lost due to vibration and folds to calculate the transmittance before light loss Next, by calculating the influence weights of the transmittance before light loss and the transmittance before thickness effect, the actual transmittance is determined by formula (6), where: represents the influence weight of transmittance before light loss, Indicates the influence weight of transmittance before thickness affects it. Finally, the real transmittance information is determined based on the real transmittance.

[0129] Through the method provided in this embodiment, the formula is used to eliminate the influence of light loss caused by wrinkles on the transmittance, and then the transmittance before light loss is obtained, which can make the obtained result closer to the true value and have higher credibility. Through the form of a formula, the specific influence of scattering and light absorption on the transmittance can be intuitively displayed. By calculating the thickness influence weight and the light loss weight, the different influence weights of thickness and light loss on the transmittance are obtained, and then the real transmittance without vibration influence is obtained. Through the preset weights, the contribution of these two factors to the real transmittance can be flexibly adjusted according to the actual situation. By using the weighted summation method, the error introduced by inaccurate measurement or incomplete consideration of a single factor can be better eliminated, and the detection accuracy of the transmittance can be improved.

[0130] In some embodiments, based on the actual transmittance information and the preset transmittance range, it is determined whether the actual transmittance information is within the preset transmittance range; if the actual transmittance information is not within the preset transmittance range, then based on the actual transmittance information, the transparency abnormality information is determined; based on the transparency abnormality information, the transparency influencing factors are determined; based on the transparency influencing factors, the transparency adjustment strategy is determined.

[0131] The preset transmittance range may be a preset transmittance range used for comparison and verification to determine whether the transmittance of the obtained HPE film meets the required transmittance range.

[0132] The transparency abnormality information may be information including the cause of the transparency abnormality.

[0133] Transparency influencing factors may be factors that can be adjusted and improved, thereby affecting transparency.

[0134] The transparency adjustment policy may be a policy for adjusting current transparency.

[0135] Specifically, during the preparation process of the HPE film, the transmittance of the HPE film needs to be tested, and abnormal HPE transparency may be detected. If no adjustment is made in time, the obtained HPE film will not meet the requirements, resulting in a large amount of raw material waste. Therefore, a clear preset transmittance range is preset, which is based on the design requirements, industry standards or customer needs of the product. Compare the calculated true transmittance with this preset range. If the true transmittance is within the preset range, the product transmittance meets the requirements. If not, it means that the product transmittance is abnormal. At this time, it is necessary to record and determine the transparency abnormality information. Analyze and determine the influencing factors that cause abnormal transparency. These factors include preparation process parameters (temperature, pressure, speed and other parameters in the process), equipment status (precision and stability of production equipment), and environmental factors (temperature, humidity, and dust in the production environment). According to the current true transmittance, combined with historical data, formulate a corresponding transparency adjustment strategy.

[0136] Through the method provided in this embodiment, by presetting the transmittance range and comparing it with the actual transmittance, it is possible to discover abnormal transmittance, avoid continuing to produce HPE films that do not meet the requirements, and help reduce the waste of raw materials caused by transmittance that does not meet the requirements. By analyzing the factors affecting abnormal transparency, potential problems in the preparation process can be discovered. By formulating adjustment strategies, the preparation process can be optimized to improve the stability and consistency of the product.

Claims

1. A method for preparing an HPE protective film material for automobiles, characterized in that: include: Acquire a plurality of preset analysis points, determine an analysis point position feature set of the HPE blown film according to the preset analysis points, and determine a plurality of fuzzy thickness information according to the analysis point position feature set; Obtaining an outer diameter of a blow die orifice, determining a vibration feature data set according to the outer diameter of the blow die orifice and the analysis point position feature set, analyzing the vibration feature data set and the plurality of fuzzy thickness information to determine a plurality of real thicknesses, determining thickness uniformity information according to the plurality of real thicknesses, and determining a thickness adjustment strategy according to the thickness uniformity information; Analyzing the plurality of real thicknesses to determine thickness influence information, acquiring a light intensity information set, analyzing the light intensity information set and the vibration characteristic data set to determine vibration scattering information and vibration absorption information; Analyze the thickness influence information, the vibration scattering information and the vibration absorption information to determine true light transmittance information, and determine a transparency adjustment strategy according to the true light transmittance information; The HPE blown film is adjusted according to the thickness adjustment strategy and the transparency adjustment strategy.

2. The method according to claim 1, characterized in that The analysis point position feature set includes current outer surface position information and current inner surface position information at a plurality of analysis points, and the determining of a plurality of fuzzy thickness information according to the analysis point position feature set includes: Determine a number of current outer surface distances and current inner surface distances according to the current outer surface position information and the current inner surface position information at a number of analysis points; Determine a current fuzzy thickness corresponding to each analysis point according to the current outer surface distances and the current inner surface distances; The plurality of fuzzy thickness information are determined according to the plurality of current fuzzy thicknesses.

3. The method according to claim 2, characterized in that Determining thickness uniformity information according to the plurality of real thicknesses includes: Determining a plurality of outer surface vibration characteristics according to the outer diameter of the blow die and a plurality of current outer surface position information; Determining the vibration feature data set according to the plurality of outer surface vibration features; Analyzing the vibration characteristic data set and the plurality of fuzzy thickness information to determine a plurality of thickness influencing parameters; determining the plurality of true thicknesses according to the plurality of thickness influencing parameters and the plurality of fuzzy thickness information; According to the plurality of real thicknesses and the preset thickness range, it is judged whether the plurality of real thicknesses are all within the preset thickness range, and the thickness uniformity information is determined according to the judgment result.

4. The method according to claim 3, characterized in that The analyzing the vibration characteristic data set and the plurality of fuzzy thickness information to determine a plurality of thickness influencing parameters includes: According to the preset analysis points, determining a number of analysis times at the preset analysis points; Determining a fuzzy thickness mean value according to the plurality of fuzzy thickness information; Determining a thickness error value according to the current fuzzy thickness and the fuzzy thickness mean; According to the thickness error value, the thickness influencing parameters, the analysis times, the preset analysis points and the fuzzy thickness mean, a thickness parameter fitting model is constructed, specifically the following fitting model: ； in, is the thickness error value, is the number of the preset analysis points, For the the current blur thickness of the analysis point, is the fuzzy thickness mean; For the The vibration amplitude of the analysis point, For the The vibration angular frequency of the analysis point, is the analysis time at the current analysis point, For the The vibration phase of each of the analysis points; Determining the optimal value of the vibration amplitude, the optimal value of the vibration angular frequency, and the optimal value of the vibration phase according to the thickness parameter fitting model; Determining the optimal value of the vibration amplitude, the optimal value of the vibration angular frequency, and the optimal value of the vibration phase as the plurality of thickness influencing parameters; The determining the plurality of true thicknesses according to the plurality of thickness influencing parameters and the plurality of fuzzy thickness information comprises: According to the current fuzzy thickness and the plurality of thickness influencing parameters at each analysis point, the plurality of true thicknesses are determined, specifically as follows: ； in, is the true thickness at the current analysis point, For the the current blur thickness of the analysis point, For the The optimal value of the vibration amplitude at each of the analysis points, For the The optimal value of the vibration angular frequency of each of the analysis points, is the number of analysis times, For the The optimal value of the vibration phase of each of the analysis points, is the preset measurement error.

5. The method according to claim 4, characterized in that Determining a thickness adjustment strategy according to the thickness uniformity information includes: If the thickness of the HPE blown film is uneven, a uniformity relationship model is constructed according to the thickness uniformity information, the preset thickness standard uniformity information and a plurality of preset abnormal influencing factors; Determining adjustment values ​​of several influencing factors according to the uniformity relationship model; The thickness adjustment strategy is determined according to the adjustment values ​​of the several influencing factors.

6. The method according to claim 5, characterized in that The preset several abnormal influencing factors include the blowing ratio and the gas flow rate. The uniformity relationship model is constructed according to the thickness uniformity information, the preset thickness standard uniformity information and the preset several abnormal influencing factors, which is specifically the following relationship expression: ； in, is the blow-up ratio, is the gas flow rate, is the preset mold radius, is the preset material density, is the thickness uniformity information, is the preset thickness standard uniformity information.

7. The method according to claim 5, characterized in that The analyzing the plurality of real thicknesses to determine thickness impact information includes: Analyze the several true thicknesses to determine a mean true thickness; The current transmittance information is obtained, and the transmittance before the thickness affects is determined according to the current transmittance information, the fuzzy thickness mean, and the true thickness mean, which is specifically the following formula: ； in, is the fuzzy thickness mean, is the true thickness mean, is the preset thickness influence coefficient, It is the thickness that affects the front light transmittance, is the current transmittance information, is the preset attenuation adjustment factor; The transmittance before thickness influence and the current transmittance information are determined as the thickness influence information.

8. The method according to claim 7, characterized in that The step of analyzing the light intensity information set and the vibration characteristic data set to determine vibration scattering information and vibration absorption information includes: Determining incident light intensity information, scattered light intensity information and transmitted light intensity information according to the light intensity information set; Determining vibration scattering efficiency according to the incident light intensity information and the scattered light intensity information; Determining the vibration scattering information according to the vibration scattering efficiency; Determining vibration absorption efficiency according to the incident light intensity information and the transmitted light intensity information; The vibration absorption information is determined according to the vibration absorption efficiency.

9. The method according to claim 8, characterized in that The analyzing the thickness influence information, the vibration scattering information and the vibration absorption information to determine the true light transmittance information includes: The transmittance before light loss is determined according to the vibration scattering efficiency, the vibration absorption efficiency, the current transmittance information and the vibration characteristic data set, specifically the following formula: ； in, is the transmittance before the light loss, is the current transmittance information, is the preset wrinkle influence coefficient, is the vibration scattering efficiency, is the vibration absorption efficiency; According to the transmittance before light loss and the transmittance before thickness influence, the real transmittance is determined, which is specifically the following formula: ; in, is the true light transmittance, is the transmittance before the light loss, It is the thickness that affects the front light transmittance, is the preset light loss influence weight, It is the preset thickness that affects the weight; The real light transmittance information is determined according to the real light transmittance.

10. The method according to claim 9, characterized in that The step of determining a transparency adjustment strategy according to the real light transmittance information includes: According to the real light transmittance information and the preset light transmittance range, determining whether the real light transmittance information is within the preset light transmittance range; If the actual light transmittance information is not within the preset light transmittance range, determining transparency abnormality information according to the actual light transmittance information; Determining transparency influencing factors according to the transparency abnormality information; The transparency adjustment strategy is determined according to the transparency influencing factors.

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