A method and system for detecting stiffness of anti-counterfeiting label paper

Abstract

The present invention relates to the technical field of paper stiffness detection, and specifically to a method and system for detecting the stiffness of anti-counterfeiting label paper, the method comprising: collecting test data of anti-counterfeiting label paper detection samples; calculating the stiffness index of each anti-counterfeiting label paper detection sample based on the test data and the total number of detection samples; judging the detection sample with a stiffness index greater than a preset threshold as having qualified stiffness, and determining the number of detection samples with qualified stiffness; and calculating the qualified rate of the detection samples based on the number of qualified stiffness of the detection samples and the total number of detection samples. This method combines the stiffness performance results of the samples with the parameters of the samples themselves, and the calculation of the stiffness difference between the samples is more accurate, which solves the problem of errors in the stiffness detection and classification process of label paper, and is conducive to the accurate calculation of the qualified rate in the detection samples and the accurate classification of the detection samples.

Description

Technical Field

[0001] The present invention relates to the technical field of paper stiffness detection, and in particular to a method and system for detecting the stiffness of anti-counterfeiting label paper. Background Art

[0002] Anti-counterfeiting label paper is a kind of label paper with anti-counterfeiting function. It is usually made of special materials, such as high-quality cellulose raw materials, and some special chemicals are added, such as fluorescent agents, optical color change agents, fiber textures, etc., to enhance the anti-counterfeiting effect. Anti-counterfeiting label paper needs to meet certain production quality standards and application standards during the manufacturing process. The stiffness of anti-counterfeiting label paper is one of the indicators to measure the quality and stability of label paper. The stiffness of anti-counterfeiting label paper refers to its hardness or rigidity when subjected to external force. Stiffness testing can help manufacturers monitor the quality of anti-counterfeiting label paper during the production process to ensure that it meets the design requirements and standards.

[0003] In the prior art, when the anti-counterfeiting label paper is tested for stiffness, due to the influence of unavoidable factors such as the production process, there are certain errors in the parameters of the test samples themselves (for example, the width and thickness of the paper), and there are certain errors in the stiffness testing and classification of the label paper. Summary of the invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a method and system for detecting the stiffness of anti-counterfeiting label paper. The technical solutions adopted are as follows:

[0005] A method for detecting the stiffness of anti-counterfeiting label paper, the method comprising:

[0006] Collect test data of anti-counterfeiting label paper test samples;

[0007] Calculate the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the total number of test samples;

[0008] Determine that the test sample has qualified stiffness if the stiffness index is greater than a preset threshold, and determine the number of test samples with qualified stiffness;

[0009] The qualified rate of the test samples is calculated based on the number of qualified test samples and the total number of test samples;

[0010] Among them, the calculation of the stiffness index of each anti-counterfeiting label paper test sample based on the test data and the total number of test samples further includes: determining the difference between any two anti-counterfeiting label paper test samples based on the test data and the total number of test samples; calculating the stiffness index of each anti-counterfeiting label paper test sample based on the test data and the difference between any two anti-counterfeiting label paper test samples.

[0011] Furthermore, the calculating of the stiffness index of each anti-counterfeit label paper test sample based on the test data and the difference between any two anti-counterfeit label paper test samples further includes:

[0012] Calculating the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the test data;

[0013] Calculate the difference between any two anti-counterfeiting label paper test samples based on the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample;

[0014] The stiffness index of each anti-counterfeit label paper test sample is calculated according to the stability of the stiffness coefficient sequence of each anti-counterfeit label paper test sample and the difference between any two anti-counterfeit label paper test samples.

[0015] Furthermore, the test data at least includes: the length, width, thickness of each anti-counterfeiting label paper, a pressure value sequence of each anti-counterfeiting label paper, and a displacement sequence of deformation of each anti-counterfeiting label paper.

[0016] Furthermore, the test data of collecting anti-counterfeit label paper detection samples further includes:

[0017] The high-sensitivity pressure sensor arranged at the right end of the push rod of the test equipment is used to collect the average pressure value generated by the anti-counterfeiting label paper on the push rod each time the push rod is pushed to the right by a preset distance;

[0018] Collect test data of a preset number of tests for each test sample, and obtain the push rod displacement distance of each test sample in each test and the pressure value collected by the pressure probe;

[0019] A push rod displacement distance sequence is constructed according to the push rod displacement distance of the preset test times as the displacement sequence of each anti-counterfeiting label paper deformation;

[0020] A pressure value sequence is constructed according to the pressure values ​​of the preset test times as the pressure value sequence of each anti-counterfeiting label.

[0021] Furthermore, the calculation of the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the test data further includes:

[0022] For each anti-counterfeiting label paper test sample, the stiffness coefficient of the test is calculated based on the push rod displacement distance and pressure value of each test of the test sample;

[0023] Constructing a stiffness coefficient sequence of the test sample according to the stiffness coefficient of the preset test times of the test sample;

[0024] The stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample is determined according to the stiffness coefficient sequence.

[0025] Furthermore, the step of determining the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample according to the stiffness coefficient sequence further includes:

[0026] For each stiffness coefficient sequence of the anti-counterfeiting label paper test sample, determine the maximum value, the minimum value and the mean value from the stiffness coefficient sequence;

[0027] The stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample is calculated based on the maximum value, the minimum value, the mean value and the preset test times.

[0028] Furthermore, the calculation of the difference between any two anti-counterfeit label paper test samples based on the stability of the stiffness coefficient sequence of each anti-counterfeit label paper test sample further includes:

[0029] A two-dimensional coordinate system is established with the thickness of each anti-counterfeiting label paper in the test data as the horizontal axis and the width of each anti-counterfeiting label paper as the vertical axis;

[0030] Mapping the data corresponding to each anti-counterfeiting label paper detection sample to the two-dimensional coordinate system;

[0031] For any two anti-counterfeiting label paper test samples, the initial difference between the two test samples is calculated according to the stability of the stiffness coefficient sequences of the two test samples;

[0032] The initial difference is corrected according to the two-dimensional coordinate system to obtain a corrected difference value between the two test samples.

[0033] Furthermore, the correcting the initial difference according to the two-dimensional coordinate system to obtain the corrected difference value between the two test samples further includes:

[0034] Determining the distance between the two detection samples in the two-dimensional coordinate system;

[0035] Determine the cosine value of the point in the two-dimensional coordinate system corresponding to the two detection samples and the line connecting the origin of the two-dimensional coordinate system and the horizontal axis;

[0036] The initial difference is corrected according to the distance and the absolute value of the difference between the cosine values ​​of the two detection samples as a correction coefficient for the difference between the two detection samples to obtain a corrected difference value between the two detection samples.

[0037] Furthermore, the stiffness index of each anti-counterfeit label paper test sample is calculated based on the stability of the stiffness coefficient sequence of each anti-counterfeit label paper test sample and the difference between any two anti-counterfeit label paper test samples, further comprising:

[0038] For each anti-counterfeiting label paper test sample, the stiffness index of the anti-counterfeiting label paper test sample is calculated based on the stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample and the corrected difference value between the anti-counterfeiting label paper test sample and any other anti-counterfeiting label paper test sample through comparison and normalization function processing.

[0039] A system for detecting the stiffness of anti-counterfeiting label paper, the system comprising:

[0040] A data acquisition module is used to collect test data of anti-counterfeiting label paper test samples;

[0041] A calculation module, used for calculating the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the total number of test samples;

[0042] A detection module is used to determine that the test sample has qualified stiffness when the stiffness index is greater than a preset threshold, and determine the number of test samples with qualified stiffness; and calculate the qualified rate of the test samples according to the number of test samples with qualified stiffness and the total number of test samples;

[0043] Among them, the calculation module is further used to: determine the difference between any two anti-counterfeiting label paper test samples based on the test data and the total number of test samples; calculate the stiffness index of each anti-counterfeiting label paper test sample based on the test data and the difference between any two anti-counterfeiting label paper test samples.

[0044] The present invention has the following beneficial effects: the present invention collects test data of anti-counterfeiting label paper test samples; calculates the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the total number of test samples; determines that the test sample with a stiffness index greater than a preset threshold is qualified in stiffness, and determines the number of test samples with qualified stiffness; and calculates the qualified rate of the test samples according to the number of test samples with qualified stiffness and the total number of test samples. When the present invention performs stiffness detection on anti-counterfeiting label paper, firstly, the stiffness coefficient sequence of each label paper is obtained according to the displacement sequence and pressure value sequence corresponding to each anti-counterfeiting label paper according to the object elasticity calculation formula, and then the stability of its stiffness sequence is obtained according to the stiffness coefficient sequence of each label paper, and further according to the stability of the stiffness sequence between the collected samples, the initial difference in stiffness between the samples is obtained by further analysis, and the stiffness difference between the samples is analyzed in an established two-dimensional coordinate system, and then the difference between the samples is corrected, so that the stiffness performance result of the sample is combined with the sample's own parameters, and the calculation of the stiffness difference between the samples is more accurate, and finally, a comprehensive analysis is performed in combination with the difference between each sample and the other samples to obtain the stiffness detection index of each test sample, which is conducive to accurately calculating the qualified rate in the test sample and accurately classifying the test sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions and advantages in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A flowchart of a method for detecting stiffness of anti-counterfeit label paper provided by one embodiment of the present invention;

[0047] Figure 2 A working diagram of a testing device provided by an embodiment of the present invention;

[0048] Figure 3 A schematic diagram of a stiffness detection system for anti-counterfeiting label paper provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0049] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following is a detailed description of the anti-counterfeiting label paper stiffness detection method and system proposed by the present invention, its specific implementation method, structure, features and effects, in combination with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "another embodiment" does not necessarily refer to the same embodiment. In addition, specific features, structures or characteristics in one or more embodiments may be combined in any suitable form.

[0050] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0051] In the present invention, when measuring the stiffness of anti-counterfeiting label paper, there are certain differences in thickness, width, etc. between the test samples due to factors such as production process, which affects the calculation and classification process of the label paper stiffness test. Therefore, the test data of the test sample is used to test the stiffness of the test sample without destroying the test sample to determine whether it meets relevant indicators such as production standards and production qualification rate.

[0052] The specific scheme of the anti-counterfeiting label paper stiffness detection method provided by the present invention is described in detail below with reference to the accompanying drawings.

[0053] See also Figure 1 , which shows a method for detecting the stiffness of anti-counterfeit label paper provided by an embodiment of the present invention, the method comprising:

[0054] Step S110: collecting test data of anti-counterfeit label paper test samples.

[0055] In an optional manner, the test data at least includes: the length, width, thickness of each security label paper, a pressure value sequence of each security label paper, and a displacement sequence of deformation of each security label paper.

[0056] In an optional manner, step S110 further includes: using a high-sensitivity pressure sensor arranged at the right end of the push rod of the testing equipment, collecting the average pressure value generated by the anti-counterfeiting label paper on the push rod each time the push rod is pushed to the right a preset distance; collecting test data for a preset number of tests for each test sample, and obtaining the push rod displacement distance of each test sample in each test and the pressure value collected by the pressure probe; constructing a push rod displacement distance sequence according to the push rod displacement distances of the preset number of tests as a displacement sequence of the deformation of each anti-counterfeiting label paper; and constructing a pressure value sequence according to the pressure values ​​of the preset number of tests as a pressure value sequence for each anti-counterfeiting label.

[0057] Figure 2 A schematic diagram of the working state of a test device provided by an embodiment of the present invention is shown in FIG. Figure 2 As shown, the test equipment 05 has various sensors and control modules. Before the test, the height of the laser probe 01 is first adjusted to meet the test distance of the minimum length in the test sample. The laser probe 01 is fixed at a certain height, and light is emitted to the right through the laser probe 01. The extended length of the anti-counterfeiting label paper test sample supported by the right console 04 is adjusted through the built-in feedback system of the test equipment 05 to meet the unified test of the length of the anti-counterfeiting label paper test sample. After the height console clamps the label paper, it senses the blocking distance of the label paper according to the light sensor set inside it, that is, the width of the anti-counterfeiting label paper test sample is obtained, and the holding distance test of the clamp is performed. The thickness data of the anti-counterfeiting label paper test sample is obtained, and after the anti-counterfeiting label paper test sample is fixed, the test rod 02 is sequentially extended to the right by a preset length according to the preset data, and the high-sensitivity pressure sensor arranged at the right end of the push rod 02 is used to collect the average pressure value generated by the anti-counterfeiting label paper test sample each time the push rod 02 is pushed to the right by a preset distance. For each sample, according to a preset number of tests (for example, 20 times, etc., set according to experimental data), a push rod displacement distance sequence is constructed according to the push rod displacement distance of the preset number of tests as the displacement sequence of each anti-counterfeiting label paper deformation; and a pressure value sequence is constructed according to the pressure values ​​of the preset number of tests as the pressure value sequence of each anti-counterfeiting label.

[0058] It is further necessary to analyze the pressure value sequence of each anti-counterfeiting label paper and the displacement sequence of each anti-counterfeiting label paper deformation to obtain the stability of the stiffness coefficient sequence of each test sample, and then obtain the difference between any two test samples. Finally, a comprehensive analysis is performed based on the differences between the test samples to obtain the stiffness index of each anti-counterfeiting label paper test sample.

[0059] It should be noted that, for the convenience of description, in this embodiment, the anti-counterfeiting label paper detection sample is referred to as “label paper” or “detection sample” for short.

[0060] Step S120: Calculate the stiffness index of each anti-counterfeit label paper test sample according to the test data and the total number of test samples.

[0061] In an optional manner, step S120 further includes the following steps 1-3:

[0062] Step 1: Calculate the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the test data.

[0063] In an optional manner, step 1 further includes: for each anti-counterfeiting label paper test sample, calculating the stiffness coefficient of the test based on the push rod displacement distance and pressure value of each test of the test sample; constructing the stiffness coefficient sequence of the test sample based on the stiffness coefficient of the preset number of tests of the test sample; and determining the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the stiffness coefficient sequence.

[0064] Through the above steps, the pressure value sequence of each anti-counterfeiting label paper and the displacement sequence of each anti-counterfeiting label paper deformation are obtained. Then, for the label paper with relatively stable stiffness, its corresponding elastic coefficient is relatively stable during the test. Therefore, based on the pressure value sequence of each anti-counterfeiting label paper and the displacement sequence of each anti-counterfeiting label paper deformation, the calculation formula for the stiffness coefficient of each label paper is obtained as follows (1):

[0065] ; (1)

[0066] In formula (1), It represents the stiffness coefficient of the label paper obtained in the i-th test corresponding to the a-th label paper; , They represent the corresponding pressure value and displacement distance of the test rod in the i-th test of the a-th label paper respectively; It represents the ratio of the corresponding pressure value in the i-th test of the a-th label paper and the displacement distance of the test rod. Because for an object with elastic deformation, its elastic force is proportional to the applied pressure. Therefore, this value represents the stiffness coefficient obtained by the i-th test of the anti-counterfeiting label paper test sample. The stiffness coefficient of the anti-counterfeiting label paper test sample in each test can be obtained through the above method. The stiffness coefficient sequence of the test sample is constructed according to the stiffness coefficient of the preset test times of the test sample, so as to obtain the stiffness coefficient sequence of the anti-counterfeiting label paper test sample.

[0067] In an optional manner, step 1 further includes: for each stiffness coefficient sequence of the anti-counterfeiting label paper test sample, determining the maximum value, the minimum value and the mean value from the stiffness coefficient sequence; calculating the stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample according to the maximum value, the minimum value, the mean value and the preset number of tests, and the stability calculation formula of the stiffness coefficient sequence is as follows (2):

[0068] ; (2)

[0069] In formula (2), The stability of the stiffness sequence of the ath label paper; Represents the mean of the a-th label paper stiffness coefficient sequence; , They represent the maximum and minimum values ​​of the stiffness coefficient sequence in the ath label paper respectively; n represents the number of tests on each label paper; represents the linear normalization function. It represents the mean of the sum of the absolute values ​​of the difference between each stiffness coefficient in the stiffness coefficient sequence obtained by the a-th label paper and the stiffness coefficient of the sequence. The larger the value, the smaller the stability of the stiffness coefficient sequence of the label paper. It represents the difference between the maximum and minimum values ​​of the stiffness coefficient sequence in the ath label paper. The larger the value, the smaller the stability of the change of the stiffness coefficient sequence of the label paper.

[0070] Step 2: Calculate the difference between any two anti-counterfeiting label paper test samples based on the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample.

[0071] In an optional manner, step 2 further includes: establishing a two-dimensional coordinate system with the thickness of each anti-counterfeiting label paper in the test data as the horizontal axis and the width of each anti-counterfeiting label paper as the vertical axis; mapping the corresponding data of each anti-counterfeiting label paper test sample to the two-dimensional coordinate system; for any two anti-counterfeiting label paper test samples, calculating the initial difference between the two test samples based on the stability of the stiffness coefficient sequence of the two test samples; and correcting the initial difference based on the two-dimensional coordinate system to obtain the corrected difference value between the two test samples.

[0072] Specifically, when testing the stiffness of anti-counterfeiting label paper, when the thickness and width data of the test samples remain uniform, and when the quality of the label paper is stable, the stiffness of the test samples is relatively similar, which is specifically manifested in that the pressure value sequence changes corresponding to these label papers are also relatively similar. However, in the actual test samples, there may be certain errors in the thickness, length, width, etc. between the test samples, which may cause certain differences in the stiffness performance between different anti-counterfeiting label paper test samples.

[0073] Therefore, in order to improve the accuracy of the stiffness evaluation of the anti-counterfeiting label paper test samples, the initial difference in the stiffness index between any two anti-counterfeiting label paper test samples is calculated, and the formula is as follows (3):

[0074] ; (3)

[0075] In the formula represents the initial difference between the a-th and b-th label sheets; , Respectively represent the stability of the stiffness coefficient sequence of the ath and bth label papers; , Respectively represent the means of the stiffness coefficient sequences of the a-th and b-th label papers. It indicates the absolute value of the difference between the stability of the stiffness coefficient sequence of the a-th and b-th label papers. The larger the value, the greater the difference in stiffness between the two label papers may be. It represents the absolute value of the difference between the means of the stiffness coefficient sequences of the a-th and b-th label papers. The larger the value is, the greater the difference in stiffness performance between the two label papers may be.

[0076] After obtaining the initial difference between any two label papers, the difference in stiffness between the two label papers may be caused by errors in the inherent parameters of the two label paper test samples, such as thickness, width, etc. Therefore, it is necessary to establish a two-dimensional plane coordinate system, and use the thickness of each anti-counterfeiting label paper in the test data as the horizontal axis and the width of each anti-counterfeiting label paper as the vertical axis to establish a two-dimensional coordinate system; map the corresponding data of each anti-counterfeiting label paper test sample to the two-dimensional coordinate system, and further analyze the distance between any two points mapped in the two-dimensional coordinate system to correct the difference between the two points, thereby reducing the error in the difference calculation between the anti-counterfeiting label paper test samples caused by the influence of the test sample's own parameters.

[0077] In an optional manner, step 2 further includes: determining the distance between the two detection samples in the two-dimensional coordinate system; determining the cosine value of the points corresponding to the two detection samples in the two-dimensional coordinate system and the line connecting the origin of the two-dimensional coordinate system and the horizontal axis; using the absolute value of the difference between the distance and the cosine value of the two detection samples as a correction coefficient for the difference between the two detection samples, and correcting the initial difference to obtain a corrected difference value between the two detection samples.

[0078] Then the calculation formula for correcting the difference between any two anti-counterfeiting label paper test samples is as follows (4):

[0079] ; (4)

[0080] In the formula Indicates the corrected difference between the a-th label paper and the b-th label paper; represents the value of the initial difference between the a-th and b-th labels obtained by equation (3); Indicates the distance between the ath and bth label papers in the two-dimensional coordinate system; Indicates the cosine value of the point corresponding to the a-th label paper in the two-dimensional coordinate system, the line connecting the coordinate origin and the horizontal axis; Indicates the cosine value of the point corresponding to the b-th label paper in the two-dimensional coordinate system, the line connecting the coordinate origin and the horizontal axis; It represents an exponential function with natural constants as the base. Its main function here is to prevent some of the above formulas from being zero. Because when the distance between the points in the two two-dimensional coordinate systems is not 0, it means that there are certain differences in thickness and width between the two label papers, and the thickness and width of the label paper have a certain influence on the stiffness calculation of the label paper. It indicates the absolute value of the difference between the point a and b of the label paper in the two-dimensional coordinate system and the line connecting the origin of the coordinate system and the cosine value of the horizontal axis. Because when there is a distance or angle between the two coordinate points, it means that there is a certain error in the thickness or width of the detection label corresponding to the two points. Therefore, the larger the value, the greater the degree of correction of the difference between the corresponding pressure value sequences of the two detection samples. At the same time, the greater the spatial distance between the two label papers in the two-dimensional coordinate system, the greater the parameter influence error of the thickness and other parameters of the stiffness detection sample itself that affects the two label papers. Therefore, It is used as a correction coefficient for the difference between the pressure value sequences corresponding to the two points mapped by label paper a and label paper b in the current two-dimensional coordinate system, and is corrected to eliminate the calculation of the stiffness difference between samples caused by the sample's own parameter error, so as to facilitate the subsequent analysis and calculation of the stiffness index between the anti-counterfeiting label paper detection samples.

[0081] Through the above step 2, the corrected difference value between each anti-counterfeiting label paper test sample can be obtained. Then, the difference between each anti-counterfeiting label paper test sample and other anti-counterfeiting label paper test samples is further analyzed to obtain the stiffness index of each anti-counterfeiting label paper test sample.

[0082] Step 3: The stiffness index of each anti-counterfeiting label paper test sample is calculated based on the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample and the difference between any two anti-counterfeiting label paper test samples.

[0083] In an optional manner, step 3 further includes: for each anti-counterfeiting label paper test sample, according to the stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample and the corrected difference value between the anti-counterfeiting label paper test sample and any other anti-counterfeiting label paper test sample, the stiffness index of the anti-counterfeiting label paper test sample is calculated by comparison and normalization function processing, and the calculation formula is as follows (5):

[0084] ; (5)

[0085] In the formula Indicates the stiffness index of the ath anti-counterfeiting label paper test sample; It indicates the stability of the stiffness sequence corresponding to the a-th label paper; m indicates the number of test samples; Indicates the corrected difference between the a-th label paper and the b-th label paper; Represents an exponential function with a natural constant as its base. It represents the mean value of the sum of the stability of each label paper stiffness coefficient value sequence; It represents the average value of the ath label stiffness coefficient value sequence divided by the mean value of the sum of the stability of each label paper stiffness coefficient value sequence. This value represents the stability of the stiffness sequence of the test sample relative to other test samples. The larger the value, the more stable the stiffness of the current test sample is among all the test samples, and the better the stiffness of the label paper test sample is. It represents the mean of the sum of the corrected difference values ​​of the ath label paper and the remaining label papers. The smaller the value, the smaller the difference between the anti-counterfeiting label paper test sample and the remaining anti-counterfeiting label paper test samples, which means that the stiffness index of the current anti-counterfeiting label paper test sample is greater.

[0086] Step S130: determining that the stiffness of the test samples is qualified if the stiffness index is greater than the preset threshold, and determining the number of the test samples that are qualified in stiffness.

[0087] Through the above, the stiffness index of each test sample is obtained, and the preset threshold T is set as the qualified standard of the anti-counterfeiting label paper test sample. Here, it is set to 0.6 based on the empirical value. If the value is less than the preset threshold, the sample is deemed to be unqualified.

[0088] Step S140: Calculate the qualified rate of the test samples according to the number of qualified test samples and the total number of test samples.

[0089] The ratio of the number of test samples greater than the preset threshold to the total number of test samples is calculated to obtain the qualified rate of the test samples, so as to facilitate timely improvement of the production process of anti-counterfeiting label paper and equipment production parameters, and to detect the qualified rate of anti-counterfeiting label paper production. At the same time, the stiffness of anti-counterfeiting label paper can also be classified to meet the planning of its application requirements on different products.

[0090] The method of this embodiment is adopted to collect test data of anti-counterfeiting label paper test samples; calculate the stiffness index of each anti-counterfeiting label paper test sample based on the test data and the total number of test samples; determine that the test sample with a stiffness index greater than a preset threshold is qualified in stiffness, and determine the number of test samples with qualified stiffness; calculate the qualified rate of the test samples based on the number of test samples with qualified stiffness and the total number of test samples. When the method performs stiffness detection on anti-counterfeiting label paper, the stiffness coefficient sequence of each label paper is first obtained according to the displacement sequence and pressure value sequence corresponding to each anti-counterfeiting label paper according to the object elasticity calculation formula, and then the stability of its stiffness sequence is obtained according to the stiffness coefficient sequence of each label paper, and the initial difference in stiffness between the samples is further analyzed according to the stability of the stiffness sequence between the collected samples, and the stiffness difference between the samples is analyzed in the established two-dimensional coordinate system, and then the difference between the samples is corrected, so that the stiffness performance results of the samples are combined with the sample's own parameters, and the calculation of the stiffness difference between the samples is more accurate, and finally, a comprehensive analysis is performed based on the difference between each sample and the other samples to obtain the stiffness detection index of each test sample, which is conducive to the accurate calculation of the qualified rate in the test samples and the accurate classification of the test samples.

[0091] The specific scheme of the anti-counterfeiting label paper stiffness detection method provided by the present invention is described in detail below with reference to the accompanying drawings.

[0092] See also Figure 3 , which shows an anti-counterfeiting label paper stiffness detection system provided by an embodiment of the present invention, the system includes: a data acquisition module 310, a calculation module 320 and a detection module 330.

[0093] The data collection module 310 is used to collect test data of anti-counterfeiting label paper detection samples.

[0094] The calculation module 320 is used to calculate the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the total number of test samples.

[0095] The detection module 330 is used to determine that the test samples with a stiffness index greater than a preset threshold are qualified in stiffness, determine the number of qualified test samples, and calculate the qualified rate of the test samples based on the number of qualified test samples and the total number of test samples.

[0096] In an optional manner, the calculation module 320 is further used to: calculate the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the test data; calculate the difference between any two anti-counterfeiting label paper test samples based on the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample; calculate the stiffness index of each anti-counterfeiting label paper test sample based on the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample and the difference between any two anti-counterfeiting label paper test samples.

[0097] In an optional manner, the test data at least includes: the length, width, thickness of each security label paper, a pressure value sequence of each security label paper, and a displacement sequence of deformation of each security label paper.

[0098] In an optional manner, the data acquisition module 310 is further used to: collect the average pressure value generated by the anti-counterfeiting label paper on the push rod each time the push rod is pushed to the right a preset distance through a high-sensitivity pressure sensor arranged at the right end of the push rod of the test equipment; collect the test data of a preset number of tests for each test sample, and obtain the push rod displacement distance of each test sample in each test and the pressure value collected by the pressure probe; construct a push rod displacement distance sequence according to the push rod displacement distance of the preset number of tests as a displacement sequence of the deformation of each anti-counterfeiting label paper; and construct a pressure value sequence according to the pressure values ​​of the preset number of tests as a pressure value sequence for each anti-counterfeiting label.

[0099] In an optional manner, the calculation module 320 is further used to: for each anti-counterfeiting label paper test sample, calculate the stiffness coefficient of the test based on the push rod displacement distance and pressure value of each test of the test sample; construct a stiffness coefficient sequence of the test sample based on the stiffness coefficient of a preset number of tests of the test sample; and determine the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the stiffness coefficient sequence.

[0100] In an optional manner, the calculation module 320 is further used to: determine the maximum value, minimum value and mean value from the stiffness coefficient sequence of each anti-counterfeiting label paper test sample; and calculate the stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample based on the maximum value, minimum value, mean value and a preset number of tests.

[0101] In an optional manner, the calculation module 320 is further used to: establish a two-dimensional coordinate system with the thickness of each anti-counterfeiting label paper in the test data as the horizontal axis and the width of each anti-counterfeiting label paper as the vertical axis; map the corresponding data of each anti-counterfeiting label paper test sample to the two-dimensional coordinate system; for any two anti-counterfeiting label paper test samples, calculate the initial difference between the two test samples according to the stability of the stiffness coefficient sequence of the two test samples; and correct the initial difference according to the two-dimensional coordinate system to obtain the corrected difference value between the two test samples.

[0102] In an optional manner, the calculation module 320 is further used to: determine the distance between the two detection samples in the two-dimensional coordinate system; determine the cosine value of the points corresponding to the two detection samples in the two-dimensional coordinate system and the line connecting the origin of the two-dimensional coordinate system and the horizontal axis; based on the absolute value of the difference between the distance and the cosine value of the two detection samples as a correction coefficient for the difference between the two detection samples, correct the initial difference to obtain the corrected difference value between the two detection samples.

[0103] In an optional manner, the calculation module 320 is further used to: for each anti-counterfeiting label paper test sample, calculate the stiffness index of the anti-counterfeiting label paper test sample based on the stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample and the corrected difference value between the anti-counterfeiting label paper test sample and any other anti-counterfeiting label paper test sample through comparison and normalization function processing.

[0104] The system of this embodiment is adopted to collect test data of anti-counterfeiting label paper test samples; calculate the stiffness index of each anti-counterfeiting label paper test sample based on the test data and the total number of test samples; determine that the test sample with a stiffness index greater than a preset threshold is qualified in stiffness, and determine the number of test samples with qualified stiffness; calculate the qualified rate of the test samples based on the number of test samples with qualified stiffness and the total number of test samples. When the system performs stiffness detection on anti-counterfeiting label paper, it first obtains the stiffness coefficient sequence of each label paper according to the displacement sequence and pressure value sequence collected corresponding to each anti-counterfeiting label paper according to the object elasticity calculation formula, and then obtains the stability of its stiffness sequence according to the stiffness coefficient sequence of each label paper, and further analyzes the stability of the stiffness sequence between the collected samples to obtain the initial difference in stiffness between the samples, and analyzes the stiffness difference between the samples in the established two-dimensional coordinate system, and then corrects the difference between the samples, so that the stiffness performance results of the samples are combined with the sample's own parameters, and the calculation of the stiffness difference between the samples is more accurate, and finally, a comprehensive analysis is performed based on the difference between each sample and the other samples to obtain the stiffness detection index of each test sample, which is conducive to the accurate calculation of the qualified rate in the test samples and the accurate classification of the test samples.

[0105] It should be noted that the sequence of the above embodiments of the present invention is only for description and does not represent the advantages and disadvantages of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0106] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

Claims

1. A method for detecting the stiffness of anti-counterfeiting label paper, characterized in that: The method comprises: Collect test data of anti-counterfeiting label paper test samples; Calculate the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the total number of test samples; Determine that the test sample has qualified stiffness if the stiffness index is greater than a preset threshold, and determine the number of test samples with qualified stiffness; The qualified rate of the test samples is calculated based on the number of qualified test samples and the total number of test samples; Wherein, the step of calculating the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the total number of test samples further comprises: determining the difference between any two anti-counterfeiting label paper test samples according to the test data and the total number of test samples; calculating the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the difference between any two anti-counterfeiting label paper test samples; The step of calculating the stiffness index of each anti-counterfeit label paper test sample based on the test data and the difference between any two anti-counterfeit label paper test samples further includes: Calculating the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the test data; Calculate the difference between any two anti-counterfeiting label paper test samples based on the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample; The stiffness index of each anti-counterfeiting label paper test sample is calculated according to the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample and the difference between any two anti-counterfeiting label paper test samples; The test data at least includes: the length, width, thickness of each anti-counterfeiting label paper, the pressure value sequence of each anti-counterfeiting label paper, and the displacement sequence of each anti-counterfeiting label paper deformation; The test data of collecting anti-counterfeit label paper test samples further includes: The high-sensitivity pressure sensor arranged at the right end of the push rod of the test equipment is used to collect the average pressure value generated by the anti-counterfeiting label paper on the push rod each time the push rod is pushed to the right by a preset distance; Collect test data of a preset number of tests for each test sample, and obtain the push rod displacement distance of each test sample in each test and the pressure value collected by the pressure probe; A push rod displacement distance sequence is constructed according to the push rod displacement distance of the preset test times as the displacement sequence of each anti-counterfeiting label paper deformation; A pressure value sequence is constructed according to the pressure values ​​of the preset test times as the pressure value sequence of each anti-counterfeiting label.

2. The method for detecting stiffness of anti-counterfeiting label paper according to claim 1, characterized in that: The calculation of the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the test data further includes: For each anti-counterfeiting label paper test sample, the stiffness coefficient of the test is calculated based on the push rod displacement distance and pressure value of each test of the test sample; Constructing a stiffness coefficient sequence of the test sample according to the stiffness coefficient of the preset test times of the test sample; The stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample is determined according to the stiffness coefficient sequence.

3. The method for detecting the stiffness of anti-counterfeiting label paper according to claim 2, characterized in that: The step of determining the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample according to the stiffness coefficient sequence further includes: For each stiffness coefficient sequence of the anti-counterfeiting label paper test sample, determine the maximum value, the minimum value and the mean value from the stiffness coefficient sequence; The stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample is calculated based on the maximum value, the minimum value, the mean value and the preset test times.

4. The method for detecting stiffness of anti-counterfeiting label paper according to claim 3, characterized in that: The calculation of the difference between any two anti-counterfeit label paper test samples based on the stability of the stiffness coefficient sequence of each anti-counterfeit label paper test sample further includes: A two-dimensional coordinate system is established with the thickness of each anti-counterfeiting label paper in the test data as the horizontal axis and the width of each anti-counterfeiting label paper as the vertical axis; Mapping the data corresponding to each anti-counterfeiting label paper detection sample to the two-dimensional coordinate system; For any two test samples, the initial difference between the two test samples is calculated according to the stability of the stiffness coefficient sequences of the two test samples; The initial difference is corrected according to the two-dimensional coordinate system to obtain a corrected difference value between the two test samples.

5. The method for detecting the stiffness of anti-counterfeiting label paper according to claim 4, characterized in that: The step of correcting the initial difference according to the two-dimensional coordinate system to obtain a corrected difference value between the two test samples further includes: Determining the distance between the two detection samples in the two-dimensional coordinate system; Determine the cosine value of the point in the two-dimensional coordinate system corresponding to the two detection samples and the line connecting the origin of the two-dimensional coordinate system and the horizontal axis; The initial difference is corrected according to the distance and the absolute value of the difference between the cosine values ​​of the two detection samples as a correction coefficient for the difference between the two detection samples to obtain a corrected difference value between the two detection samples.

6. The method for detecting stiffness of anti-counterfeiting label paper according to claim 5, characterized in that: The step of calculating the stiffness index of each anti-counterfeiting label paper test sample according to the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample and the difference between any two anti-counterfeiting label paper test samples further includes: For each anti-counterfeiting label paper test sample, the stiffness index of the anti-counterfeiting label paper test sample is calculated based on the stability of the stiffness coefficient sequence of the anti-counterfeiting label paper test sample and the corrected difference value between the anti-counterfeiting label paper test sample and any other anti-counterfeiting label paper test sample through comparison and normalization function processing.

7. A system for detecting the stiffness of anti-counterfeiting label paper, characterized in that: The system comprises: A data acquisition module is used to collect test data of anti-counterfeiting label paper test samples; A calculation module, used for calculating the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the total number of test samples; A detection module is used to determine that the test sample has qualified stiffness when the stiffness index is greater than a preset threshold, and determine the number of test samples with qualified stiffness; and calculate the qualified rate of the test samples according to the number of test samples with qualified stiffness and the total number of test samples; The calculation module is further used to: determine the difference between any two anti-counterfeiting label paper test samples according to the test data and the total number of test samples; calculate the stiffness index of each anti-counterfeiting label paper test sample according to the test data and the difference between any two anti-counterfeiting label paper test samples; The step of calculating the stiffness index of each anti-counterfeit label paper test sample based on the test data and the difference between any two anti-counterfeit label paper test samples further includes: Calculating the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample based on the test data; Calculate the difference between any two anti-counterfeiting label paper test samples based on the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample; The stiffness index of each anti-counterfeiting label paper test sample is calculated according to the stability of the stiffness coefficient sequence of each anti-counterfeiting label paper test sample and the difference between any two anti-counterfeiting label paper test samples; The test data at least includes: the length, width, thickness of each anti-counterfeiting label paper, the pressure value sequence of each anti-counterfeiting label paper, and the displacement sequence of each anti-counterfeiting label paper deformation; The test data of collecting anti-counterfeit label paper test samples further includes: The high-sensitivity pressure sensor arranged at the right end of the push rod of the test equipment is used to collect the average pressure value generated by the anti-counterfeiting label paper on the push rod each time the push rod is pushed to the right by a preset distance; Collect test data of a preset number of tests for each test sample, and obtain the push rod displacement distance of each test sample in each test and the pressure value collected by the pressure probe; A push rod displacement distance sequence is constructed according to the push rod displacement distance of the preset test times as the displacement sequence of each anti-counterfeiting label paper deformation; A pressure value sequence is constructed according to the pressure values ​​of the preset test times as the pressure value sequence of each anti-counterfeiting label.

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