Dynamic detection method of mechanochromic film combined with light response

Abstract

The present invention discloses a dynamic detection method for a mechanochromic film combined with light response, which relates to the technical field related to recording carrier processing. The mechanochromic film is pre-prepared through a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample. A universal material testing machine is activated to apply a force to the anti-counterfeiting sample, and the light response information of the anti-counterfeiting sample under the force is obtained by dynamic monitoring through a combined spectrometer. The first spectrum in the light response information is extracted, and the first characteristic parameter set of the first spectrum is collected. An anti-counterfeiting performance comprehensive evaluation function is introduced to evaluate and analyze the first characteristic parameter set to obtain a first comprehensive performance. The anti-counterfeiting adaptability of the mechanochromic film is obtained by analyzing the first comprehensive performance. The technical problems of insufficient dynamic light response monitoring and incomplete comprehensive performance evaluation in the existing mechanochromic film detection method are solved. The adaptability and detection accuracy of the anti-counterfeiting film under mechanical action are improved.

Description

Technical Field

[0001] The present application relates to the technical field related to recording medium processing, and in particular to a dynamic detection method of a mechanochromic film combined with light response. Background Art

[0002] As an important part of the anti-counterfeiting field, the reliability of anti-counterfeiting film performance and the accuracy of detection are directly related to the practical application of anti-counterfeiting effects. Existing anti-counterfeiting film preparation methods mostly focus on single structural design or static performance testing, lack of systematic optimization of multi-layer film structure connection strategies, and insufficient real-time monitoring capabilities of light response characteristics under dynamic mechanical action. In addition, traditional evaluation methods often rely on single parameter analysis, which makes it difficult to fully reflect the comprehensive performance of anti-counterfeiting films in complex stress environments. Therefore, how to improve the adaptability and detection accuracy of anti-counterfeiting films through structural design optimization, dynamic light response monitoring and multi-dimensional characteristic parameter analysis has become an urgent problem to be solved.

[0003] Therefore, in the existing technology, the detection method of mechanochromic film has technical problems such as insufficient dynamic light response monitoring and incomplete comprehensive performance evaluation. Summary of the Invention

[0004] This application addresses the technical challenges of existing mechanochromic film detection methods, which suffer from insufficient dynamic light response monitoring and incomplete comprehensive performance evaluation, by providing a dynamic detection method for mechanochromic films that incorporates light response. By optimizing the interlayer connection scheme through a predefined anti-counterfeiting fabrication strategy and combining dynamic spectral monitoring with a multi-parameter evaluation function, the adaptability and detection accuracy of the anti-counterfeiting film under mechanical influence are significantly improved.

[0005] The present application provides a dynamic detection method for a mechanochromic film combined with light response, comprising the following steps: pre-preparing the mechanochromic film according to a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample; activating a universal material testing machine to apply a force to the anti-counterfeiting sample, and dynamically monitoring the light response information of the anti-counterfeiting sample under the force through a combined spectrometer; extracting a first spectrum from the light response information, and collecting and obtaining a first characteristic parameter set of the first spectrum; introducing an anti-counterfeiting performance comprehensive evaluation function to evaluate and analyze the first characteristic parameter set to obtain a first comprehensive performance; and analyzing the first comprehensive performance to obtain the anti-counterfeiting adaptability of the mechanochromic film.

[0006] In the implementation method, the force-chromic film is pre-prepared according to a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample, including: obtaining an anti-counterfeiting film structure, wherein the anti-counterfeiting film structure refers to a structure including multiple layers with identifications of film state and film thickness; obtaining a layer connection plan, wherein the layer connection plan refers to a plan for connecting and forming a first structural layer and a second structural layer; wherein, the first structural layer refers to any one structural layer in the multiple layers with identifications of film state and film thickness, and the second structural layer refers to any one structural layer in the multiple layers with identifications of film state and film thickness that is interconnected with the first structural layer; and the predetermined anti-counterfeiting preparation strategy is generated based on the anti-counterfeiting film structure and the layer connection plan.

[0007] In the implementation method, a universal material testing machine is activated to apply a force to the anti-counterfeiting sample, and light response information of the anti-counterfeiting sample under the force is obtained through dynamic monitoring of the combined spectrometer, including: extracting a first test plan in a predetermined material test strategy; performing a force application test on the anti-counterfeiting sample based on the first test plan, and activating the first spectrometer in the combined spectrometer to monitor and obtain first light response information; wherein the combined spectrometer includes at least a fiber optic spectrometer, an ultraviolet-visible spectrometer, and a fluorescence spectrometer; and constructing the light response information based on the first light response information.

[0008] In the implementation method, before extracting the first test plan in the predetermined material testing strategy, it includes: forming a force feature set and extracting the first force feature in the force feature set; collaboratively analyzing the film material characteristics of the mechanochromic film and the equipment design characteristics of the universal material testing machine to obtain a first characteristic parameter range of the first force feature; constructing a material test space based on a first correspondence between the first force feature and the first characteristic parameter range; and randomly extracting any test plan in the material test space to form the predetermined material testing strategy.

[0009] In an implementation, the force feature set includes at least type, magnitude, direction, speed, and duration.

[0010] In the implementation method, after the force application test is performed on the anti-counterfeiting sample based on the first test plan, and the first spectrometer in the combined spectrometer is activated to monitor and obtain the first light response information, it also includes: monitoring the force application process of the first test plan by a force sensor loaded on the anti-counterfeiting sample to obtain a first force monitoring record; extracting any force feature from the force features; matching the first arbitrary monitoring information corresponding to the arbitrary force feature in the first force monitoring record; matching the first arbitrary predetermined information corresponding to the arbitrary force feature in the first test plan; comparing the first arbitrary monitoring information with the first arbitrary predetermined information to obtain a first comparison result; analyzing the first comparison result to obtain a first test deviation, and using the first test deviation as an influencing factor to perform impact calibration on the first light response information.

[0011] In an implementation, the anti-counterfeiting performance comprehensive evaluation function is expressed as follows:

[0012] ;

[0013] in, refers to the first comprehensive performance, It refers to the first characteristic parameter set The comprehensive weight of the feature parameters, refers to the total number of feature parameters in the first feature parameter set, and , 、 、 、 Respectively refer to the The information value coefficient of the characteristic parameters on the color change sensitivity, response speed, color change range and reversibility of the anti-counterfeiting sample, 、 、 、 Respectively refer to the The color change sensitivity, response speed, color change range, and reversibility value corresponding to each characteristic parameter are: 、 、 、 、 、 、 、 They refer to the minimum and maximum values ​​of color change sensitivity, response speed, color change range, and reversibility, respectively, and are used for normalization processing.

[0014] In the implementation method, after introducing the anti-counterfeiting performance comprehensive evaluation function to evaluate and analyze the first feature parameter set to obtain the first comprehensive performance, it also includes: obtaining a feature parameter cross-coupling information value evaluation function; performing a cross-coupling analysis on the first feature parameter set according to the feature parameter cross-coupling information value evaluation function to obtain a first comprehensive cross-coupling coefficient; and adjusting the first comprehensive performance with the first comprehensive cross-coupling coefficient as a weight.

[0015] In an implementation, the expression of the characteristic parameter cross-coupling information value evaluation function is as follows:

[0016] ;

[0017] in, refers to the first integrated cross-coupling coefficient, Refers to the first feature parameter set The characteristic parameters and The comprehensive cross-coupling weight of the characteristic parameters, 、 、 、 Respectively refer to the The characteristic parameters are related to the The cross-information value coefficient of each characteristic parameter in color change sensitivity, response speed, color change range, and reversibility.

[0018] The dynamic detection method of mechanochromic film combined with light response proposed in this application is to pre-prepare the mechanochromic film through a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample; activate the universal material testing machine to apply force to the anti-counterfeiting sample, and dynamically monitor the light response information of the anti-counterfeiting sample under the force through a combined spectrometer; extract the first spectrum in the light response information, and collect the first characteristic parameter set of the first spectrum; introduce an anti-counterfeiting performance comprehensive evaluation function to evaluate and analyze the first characteristic parameter set to obtain a first comprehensive performance; analyze the first comprehensive performance to obtain the anti-counterfeiting adaptability of the mechanochromic film. This solves the technical problems of insufficient dynamic light response monitoring and incomplete comprehensive performance evaluation in the existing mechanochromic film detection method. By optimizing the interlayer connection scheme through a predetermined anti-counterfeiting preparation strategy and combining dynamic spectrum monitoring with a multi-parameter evaluation function, the adaptability and detection accuracy of the anti-counterfeiting film under mechanical action are significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the accompanying drawings of the embodiments of the present disclosure are briefly introduced below. Flowcharts are used in this application to illustrate the operations performed by the systems according to the embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in precise order. Instead, various steps may be processed in reverse order or simultaneously as needed. Furthermore, other operations may be added to these processes, or one or more operations may be removed from these processes.

[0020] Figure 1 A schematic flow chart of a dynamic detection method for a mechanochromic film combined with light response provided in an embodiment of the present application;

[0021] Figure 2 Schematic diagram of the process of obtaining light response information by the dynamic detection method of mechanochromic film combined with light response provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below.

[0023] In order to make the purpose, technical solutions and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings. The described embodiments should not be regarded as limiting this application. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict, and the terms “first\second” involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. The terms “including” and “having” and any variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or server that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or modules that are not clearly listed or that are inherent to these processes, methods, products, or devices. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein are for the purpose of describing the embodiments of this application only.

[0025] The present application provides a method for dynamic detection of a mechanochromic film in combination with light response, such as Figure 1As shown, the method includes:

[0026] The mechanochromic film is pre-prepared according to a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample; the universal material testing machine is activated to apply a force to the anti-counterfeiting sample, and the light response information of the anti-counterfeiting sample under the force is obtained by dynamic monitoring through a combined spectrometer; the first spectrum in the light response information is extracted, and a first characteristic parameter set of the first spectrum is collected.

[0027] Mechanochromic films are commonly used in the production of anti-counterfeiting labels. By applying external forces, such as pressure or bending, the film changes color, revealing hidden information or patterns. This characteristic makes anti-counterfeiting labels difficult to copy, as counterfeiters find it difficult to replicate both the chemical composition and mechanical response characteristics of the material. A mechanochromic film is pre-prepared according to a predetermined anti-counterfeiting preparation strategy to produce an anti-counterfeiting sample. The anti-counterfeiting sample comprises a multilayer structure composed of a substrate layer, a photochromic layer, and a protective layer, formed based on a combination of design parameters. The predetermined anti-counterfeiting preparation strategy is generated based on the anti-counterfeiting film structure and the layer connection plan. Furthermore, a universal material testing machine is activated to apply force to the anti-counterfeiting sample. The universal material testing machine is suitable for various mechanical property tests on materials, including tensile, compression, bending, shear, peeling, and tearing tests. Tensile tests are typically performed on anti-counterfeiting samples. The optical response information of the anti-counterfeiting sample under the applied force is dynamically monitored by a combination of spectrometers. The optical response information includes response data dynamically monitored by multiple spectrometers. Furthermore, a first spectrum from the optical response information is extracted, and a first characteristic parameter set of the first spectrum is collected. The first characteristic parameter set includes spectral absorption characteristic parameters, spectral reflection characteristic parameters, spectral shape characteristic parameters, etc.

[0028] The method provided in an embodiment of the present application also includes: obtaining an anti-counterfeiting film structure, wherein the anti-counterfeiting film structure refers to a structure including multiple layers with identifications of film state and film thickness; obtaining a layer connection plan, wherein the layer connection plan refers to a plan for connecting and forming the first structural layer and the second structural layer; wherein the first structural layer refers to any one structural layer in the multiple layers with identifications of film state and film thickness, and the second structural layer refers to any one structural layer in the multiple layers with identifications of film state and film thickness that is interconnected with the first structural layer; and generating the predetermined anti-counterfeiting preparation strategy based on the anti-counterfeiting film structure and the layer connection plan.

[0029] The force-induced chromic film is pre-prepared according to a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample, including: obtaining an anti-counterfeiting film structure, which is an anti-counterfeiting film structure pre-designed by professional and technical personnel, and the anti-counterfeiting film structure includes a multi-layer structure with a film state and film thickness identification. Among them, the film state is the specific distribution method and category of the structural layer, such as the substrate layer, the photochromic layer and the protective layer. The film thickness is the film thickness of each layer. Since only the film state and film layer thickness of the anti-counterfeiting film structure are obtained at this time, the connection and forming method between the films of the anti-counterfeiting film structure, such as the connection method of the substrate layer and the photochromic layer when they are connected, is not known. Therefore, it is necessary to obtain a layer connection plan, which refers to a plan for connecting and forming the first structural layer and the second structural layer, that is, obtaining a connection and forming plan with adjacent structural layers. Among them, the first structural layer refers to any one of the multi-layer structures with film state and film thickness identification, and the second structural layer refers to any one of the multi-layer structures with film state and film thickness identification that is connected to the first structural layer. The bonding and forming scheme is a pre-defined bonding and forming scheme by professional technicians based on the characteristics of the structural layers, such as plasma treatment and UV-ozone activation treatment in physical bonding technologies, and silane coupling agent bridging and epoxy resin transition layers in chemical bonding technologies. Finally, the predetermined anti-counterfeiting preparation strategy is generated based on the anti-counterfeiting film structure and the pre-defined layer bonding scheme.

[0030] like Figure 2 As shown, the method provided in an embodiment of the present application further includes: extracting a first test plan from a predetermined material test strategy; performing a force application test on the anti-counterfeiting sample based on the first test plan, and activating a first spectrometer in the combined spectrometer to monitor and obtain first light response information; wherein the combined spectrometer includes at least a fiber spectrometer, an ultraviolet-visible spectrometer, and a fluorescence spectrometer; and constructing the light response information based on the first light response information.

[0031] Activating a universal material testing machine to apply a force to the anti-counterfeiting sample, and dynamically monitoring the optical response information of the anti-counterfeiting sample under the applied force through a combined spectrometer, including: extracting a first test plan from a predetermined material testing strategy, wherein the first test plan is a random mechanical loading program from the predetermined material testing strategy, including control parameters such as type, force magnitude, direction, loading rate, and hold time. For example, a polymer film is tested using a universal material testing machine. In force control mode, a uniaxial tensile fixture is set, with a force magnitude ranging from 0 N to 15 N, and stretching is performed along the long axis of the sample at a stretching rate of 1 mm / min. A single load of 15 N is maintained for 30 seconds, and the spectrometer is triggered to record spectral data in real time during the monitoring process. Based on the first test plan, a force application test is performed on the anti-counterfeiting sample, and the universal material testing machine is controlled to execute the force application test using control parameters such as maximum load, loading rate, and hold time. Simultaneously, activating a first spectrometer in the combined spectrometer to monitor and obtain first optical response information, i.e., by activating any spectrometer in the combined spectrometer and obtaining a signal monitored by the spectrometer to obtain the first optical response information. The combined spectrometer includes at least a fiber optic spectrometer, a UV-visible spectrometer, and a fluorescence spectrometer. The fiber optic spectrometer uses light generated by a light source to transmit light to the sample via an optical fiber. After being reflected, absorbed, or scattered by the sample, the light is then transmitted to the spectrometer via an optical fiber. After being processed by a grating or interferometer, it is detected by a detector. By measuring the specific wavelength of light absorbed by the sample, the spectral information of the sample can be obtained. The UV-visible spectrometer is an instrument that operates using UV-visible spectroscopy. Its principle is that molecules or groups in a substance absorb the energy of the incident UV-visible light, and the energy level transitions between electrons produce a characteristic UV-visible spectrum. The fluorescence spectrometer is based on fluorescence analysis, that is, after absorbing light energy, the molecules of a substance transition from the ground state to the excited state, and then release photons when returning to the ground state. The first spectrometer is any one of the spectrometers in the combined spectrometer. Finally, the light response information is assembled based on the first light response information. The method provided in an embodiment of the present application also includes: establishing a force feature set and extracting a first force feature from the force feature set; collaboratively analyzing the film material characteristics of the mechanochromic film and the equipment design characteristics of the universal material testing machine to obtain a first characteristic parameter range of the first force feature; constructing a material test space based on a first correspondence between the first force feature and the first characteristic parameter range; and randomly extracting any test plan from the material test space to form the predetermined material test strategy.

[0032] Before extracting the first test plan from the predetermined material testing strategy, the process includes: assembling a force feature set. The force feature set is a set of parameters describing the mechanical loading behavior during the test, including: type (load application form, such as tension, compression, shear, and bending); force magnitude; direction; rate (load change rate); and duration (duration). The first force feature from the force feature set is extracted, serving as a force magnitude indicator. Furthermore, a collaborative analysis is performed between the film material characteristics of the mechanochromic film and the equipment design features of the universal material testing machine. The film material characteristics are the expected design parameters of the film material, such as transverse tensile strength and longitudinal tensile strength. The matching relationship between the membrane material characteristics and the equipment design characteristics is pre-set. Taking the expected fracture strength as an example, the corresponding equipment design characteristic is the magnitude of the load force. The load force parameter corresponding to the fracture strength of the membrane material of the mechanochromic membrane is calculated by the fracture strength calculation formula, and the control range corresponding to the load force in the equipment design characteristics is obtained. The minimum load force is obtained, and the minimum load force is used as the starting point of the characteristic parameter range and the calculated load force parameter is used as the end point of the characteristic parameter range to obtain the first characteristic parameter range, thereby obtaining the first characteristic parameter range of the first force characteristic. Further, based on the first force characteristic and the first characteristic parameter range, a first corresponding relationship between the two is constructed, and a material test space is constructed according to the first corresponding relationship. Finally, a plurality of arbitrary test plans are randomly extracted in the material test space to form the predetermined material test strategy.

[0033] The method provided in an embodiment of the present application also includes: monitoring the force application process of the first test plan through a force sensor loaded on the anti-counterfeiting sample to obtain a first force monitoring record; extracting any force feature from the force features; matching the first arbitrary monitoring information corresponding to the arbitrary force feature in the first force monitoring record; matching the first arbitrary predetermined information corresponding to the arbitrary force feature in the first test plan; comparing the first arbitrary monitoring information with the first arbitrary predetermined information to obtain a first comparison result; analyzing the first comparison result to obtain a first test deviation, and using the first test deviation as an influencing factor to perform an impact calibration on the first light response information.

[0034] After performing a force application test on the anti-counterfeiting sample based on the first test plan and activating the first spectrometer in the combined spectrometer to monitor and obtain first light response information, the method further includes: monitoring the force application process of the first test plan using force sensors mounted on both sides of the anti-counterfeiting sample, including the magnitude, direction, rate, and duration, to obtain a first force monitoring record. The first force monitoring record is real-time monitoring data of each force characteristic during the force application process, wherein the duration is recorded using a timing device. Further, any force characteristic from the force characteristics is extracted and matched with the first arbitrary monitoring information corresponding to the arbitrary force characteristic in the first force monitoring record. The first arbitrary predetermined information corresponding to the arbitrary force characteristic is matched in the first test plan. The first arbitrary predetermined information is the test standard predetermined in the first test plan. For example, if the predetermined tensile force is 5N and the actual tensile force in the first force monitoring record is 4.8N, the corresponding test standard does not meet the test plan requirements. A first comparison result is obtained by comparing the first arbitrary monitoring information with the first arbitrary predetermined information. The first comparison result is the difference between the first arbitrary monitoring information and the corresponding first arbitrary predetermined information. The first comparison result is analyzed to obtain a first test deviation, which is equal to the ratio of the first comparison result to the first arbitrary predetermined information. Finally, the first light response information is impact calibrated using the first test deviation as an influencing factor. When performing the impact calibration, historical test data is acquired, parameters influencing the light response information by the influencing factors are collected, and a list of correspondences between the influencing factors and the influencing parameters of the light response information is constructed. Based on the correspondence list, the influencing factors can be used to quickly determine the influencing parameters on the light response information. The first light response information is compensated using the influencing parameters, thereby completing the impact calibration of the first light response information.

[0035] An anti-counterfeiting performance comprehensive evaluation function is introduced to evaluate and analyze the first characteristic parameter set to obtain a first comprehensive performance; and the anti-counterfeiting adaptability of the mechanochromic film is obtained by analyzing the first comprehensive performance.

[0036] After obtaining the first characteristic parameter set of the first spectrum, the first characteristic parameter set is evaluated and analyzed using an anti-counterfeiting performance comprehensive evaluation function to obtain a first comprehensive performance.

[0037] The expression of the comprehensive evaluation function of anti-counterfeiting performance is as follows:

[0038] ;

[0039] in, refers to the first comprehensive performance, It refers to the first characteristic parameter set The comprehensive weight of the feature parameters, refers to the total number of feature parameters in the first feature parameter set, and , 、 、 、 Respectively refer to the The information value coefficient of the characteristic parameters on the color change sensitivity, response speed, color change range and reversibility of the anti-counterfeiting sample, 、 、 、 Respectively refer to the The color change sensitivity, response speed, color change range, and reversibility value corresponding to each characteristic parameter are: 、 、 、 、 、 、 、 These are the minimum and maximum values ​​for color change sensitivity, response speed, color change range, and reversibility, respectively, and are used for normalization. The first comprehensive performance is the comprehensive evaluation data for anti-counterfeiting performance. Finally, after calculating the first comprehensive performance, the first comprehensive performance is analyzed to determine the anti-counterfeiting fitness of the mechanochromic film. Specifically, the deviation ratio between the first comprehensive performance and the preset comprehensive performance index data is calculated, and the anti-counterfeiting fitness of the mechanochromic film is calculated by subtracting the deviation ratio from 1.

[0040] The method provided in an embodiment of the present application also includes: obtaining a characteristic parameter cross-coupling information value evaluation function; performing a cross-coupling analysis on the first characteristic parameter set according to the characteristic parameter cross-coupling information value evaluation function to obtain a first comprehensive cross-coupling coefficient; and adjusting the first comprehensive performance using the first comprehensive cross-coupling coefficient as a weight.

[0041] After introducing the anti-counterfeiting performance comprehensive evaluation function to evaluate and analyze the first feature parameter set to obtain the first comprehensive performance, the method further includes: obtaining a feature parameter cross-coupling information value evaluation function. Using the feature parameter cross-coupling information value evaluation function, a cross-coupling analysis is performed on the first feature parameter set to obtain a first comprehensive cross-coupling coefficient. The feature parameter cross-coupling information value evaluation function is expressed as follows:

[0042] ;

[0043] in, refers to the first integrated cross-coupling coefficient, Refers to the first feature parameter set The characteristic parameters and The comprehensive cross-coupling weight of the characteristic parameters, 、 、 、 Respectively refer to the The characteristic parameters are related to the The cross-information value coefficients of the characteristic parameters in terms of color change sensitivity, response speed, color change range, and reversibility are calculated. Finally, the first comprehensive performance is adjusted using the first comprehensive cross-coupling coefficient as a weight to obtain the first comprehensive performance data after weight calculation. This solves the technical problems of insufficient dynamic light response monitoring and incomplete comprehensive performance evaluation in existing mechanochromic film detection methods. By optimizing the interlayer connection scheme through a predetermined anti-counterfeiting preparation strategy and combining dynamic spectral monitoring with a multi-parameter evaluation function, the adaptability and detection accuracy of the anti-counterfeiting film under mechanical action are significantly improved.

[0044] The technical solution provided by the embodiment of the present invention is to pre-prepare the mechanochromic film according to a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample. The universal material testing machine is activated to apply a force to the anti-counterfeiting sample, and the light response information of the anti-counterfeiting sample under the force is obtained by dynamic monitoring through a combined spectrometer. The first spectrum in the light response information is extracted, and the first characteristic parameter set of the first spectrum is collected. The anti-counterfeiting performance comprehensive evaluation function is introduced to evaluate and analyze the first characteristic parameter set to obtain the first comprehensive performance. The anti-counterfeiting adaptability of the mechanochromic film is obtained by analyzing the first comprehensive performance. The technical problems of insufficient dynamic light response monitoring and incomplete comprehensive performance evaluation in the existing mechanochromic film detection method are solved. The interlayer connection scheme is optimized by a predetermined anti-counterfeiting preparation strategy, and the dynamic spectrum monitoring and multi-parameter evaluation function are combined to significantly improve the adaptability and detection accuracy of the anti-counterfeiting film under mechanical action.

[0045] The above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A dynamic detection method for a mechanochromic film combined with light response, characterized in that: include: The mechanochromic film is pre-prepared according to a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample; activating the universal material testing machine to apply a force to the anti-counterfeiting sample, and dynamically monitoring the light response information of the anti-counterfeiting sample under the force through the combined spectrometer; extracting a first spectrum from the light response information, and collecting and obtaining a first characteristic parameter set of the first spectrum; Introducing an anti-counterfeiting performance comprehensive evaluation function to evaluate and analyze the first feature parameter set to obtain a first comprehensive performance; Analyzing the first comprehensive performance to obtain the anti-counterfeiting adaptability of the mechanochromic film; The anti-counterfeiting performance comprehensive evaluation function is expressed as follows: ； in, refers to the first comprehensive performance, It refers to the first characteristic parameter set The comprehensive weight of the feature parameters, refers to the total number of feature parameters in the first feature parameter set, and , 、 、 、 Respectively refer to the The information value coefficient of the characteristic parameters on the color change sensitivity, response speed, color change range and reversibility of the anti-counterfeiting sample, 、 、 、 They respectively refer to the color change sensitivity, response speed, color change range, and reversibility value corresponding to the i-th characteristic parameter, 、 、 、 、 、 、 、 They refer to the minimum and maximum values ​​of color change sensitivity, response speed, color change range, and reversibility, respectively, and are used for normalization processing.

2. The method for dynamic detection of mechanochromic film combined with light response according to claim 1, characterized in that: The mechanochromic film is pre-prepared according to a predetermined anti-counterfeiting preparation strategy to obtain an anti-counterfeiting sample, including: Obtaining an anti-counterfeiting film structure, wherein the anti-counterfeiting film structure refers to a structure including multiple layers of markings having film states and film thicknesses; Obtaining a layer connection plan, wherein the layer connection plan refers to a plan for connecting and forming the first structural layer and the second structural layer; The first structural layer refers to any one structural layer in the multi-layer structure having the identification of film state and film thickness, and the second structural layer refers to any one structural layer in the multi-layer structure having the identification of film state and film thickness that is interconnected with the first structural layer; The predetermined anti-counterfeiting preparation strategy is generated based on the anti-counterfeiting film structure and the layer connection plan.

3. The method for dynamic detection of mechanochromic film combined with light response according to claim 1, characterized in that: Activating the universal material testing machine to apply a force to the anti-counterfeiting sample, and dynamically monitoring the light response information of the anti-counterfeiting sample under the force through the combined spectrometer, including: Extracting a first test plan from a predetermined material test strategy; performing a force application test on the anti-counterfeiting sample based on the first test plan, and activating a first spectrometer in the combined spectrometer to monitor and obtain first light response information; Wherein, the combined spectrometer comprises at least a fiber optic spectrometer, an ultraviolet-visible spectrometer and a fluorescence spectrometer; The light response information is constructed based on the first light response information.

4. The method for dynamic detection of mechanochromic film combined with light response according to claim 3, characterized in that: Before extracting the first test plan in the planned material testing strategy, including: Establishing a force feature set, and extracting a first force feature from the force feature set; Coordinately analyzing the film material characteristics of the mechanochromic film and the equipment design characteristics of the universal material testing machine to obtain a first characteristic parameter range of the first force characteristic; constructing a material test space based on a first correspondence between the first force characteristic and the first characteristic parameter range; Randomly extract any test plan in the material test space to form the predetermined material test strategy.

5. The method for dynamic detection of mechanochromic film combined with light response according to claim 4, characterized in that: The force feature set includes at least type, magnitude, direction, speed and duration.

6. The method for dynamic detection of mechanochromic film combined with light response according to claim 5, characterized in that: After performing a force application test on the anti-counterfeiting sample based on the first test plan and activating the first spectrometer in the combined spectrometer to monitor and obtain first light response information, the method further includes: monitoring the force application process of the first test plan by a force sensor mounted on the anti-counterfeiting sample to obtain a first force monitoring record; extracting any force feature from the force features; matching first arbitrary monitoring information corresponding to the arbitrary force feature in the first force monitoring record; Matching first arbitrary predetermined information corresponding to the arbitrary force feature in the first test plan; Comparing the first arbitrary monitoring information with the first arbitrary predetermined information to obtain a first comparison result; The first comparison result is analyzed to obtain a first experimental deviation, and the first light response information is impact calibrated using the first experimental deviation as an impact factor.

7. The method for dynamic detection of mechanochromic film combined with light response according to claim 1, characterized in that: After introducing the anti-counterfeiting performance comprehensive evaluation function to evaluate and analyze the first feature parameter set to obtain the first comprehensive performance, the method further includes: Obtaining characteristic parameter cross-coupling information value evaluation function; Performing a cross-coupling analysis on the first characteristic parameter set according to the characteristic parameter cross-coupling information value evaluation function to obtain a first comprehensive cross-coupling coefficient; The first comprehensive performance is adjusted using the first comprehensive cross-coupling coefficient as a weight.

8. The method for dynamic detection of mechanochromic film combined with light response according to claim 7, characterized in that: The expression of the characteristic parameter cross-coupling information value evaluation function is as follows: ； in, refers to the first integrated cross-coupling coefficient, Refers to the first feature parameter set The characteristic parameters and The comprehensive cross-coupling weight of the characteristic parameters, 、 、 、 Respectively refer to the The characteristic parameters are related to the The cross-information value coefficient of each characteristic parameter in color change sensitivity, response speed, color change range, and reversibility.

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