Method for detecting a security element

Abstract

The application provides a detection method of an anti-fake element. The anti-fake element has at least one magnetic area containing a machine-readable signal with a positive-negative half-cycle asymmetric waveform feature. The detection method of the anti-fake element comprises the following steps: S1, acquiring the waveform feature of the machine-readable signal of the magnetic area; S2, obtaining the peak value ratio of the magnetic area according to the waveform feature; and S3, comparing the peak value ratio of the magnetic area with a standard peak value ratio to determine a detection result. The application solves the problem that the anti-fake element with the machine-readable signal of the positive-negative half-cycle asymmetric waveform feature is not easy to detect in the prior art.

Description

Technical Field

[0001] This invention relates to the field of anti-counterfeiting detection technology, and more specifically, to a method for detecting anti-counterfeiting elements. Background Technology

[0002] The machine-readable signals of anti-counterfeiting elements in securities play a crucial role in their anti-counterfeiting and clearing functions. In conventional securities, the waveforms of these machine-readable signals are symmetrical. However, with the continuous improvement of anti-counterfeiting performance, various technologies are being adopted to enhance the diversity of the waveform characteristics of these anti-counterfeiting elements.

[0003] Patent WO2012000568A1 proposes an anti-counterfeiting element where the magnetic region includes at least partially covered deposited at least two magnetic materials with different coercive fields, and the detected machine-readable signal has asymmetrical waveform characteristics with positive and negative peaks. Patent CN105321251B proposes an anti-counterfeiting element where the magnetic region is coated with different coating shapes according to a set rule, and the detected machine-readable signal has asymmetrical waveform characteristics. Patent CN110744948B proposes an anti-counterfeiting element with a stepped thickness distribution of the magnetic region, and the detected machine-readable signal has waveform characteristics of various combinations of positive and negative half-waves with different numbers and amplitudes. Therefore, anti-counterfeiting elements with asymmetrical waveform characteristics of positive and negative half-cycles in the machine-readable signal have become a new development direction.

[0004] When detecting anti-counterfeiting components, the waveform amplitude, waveform phase, and waveform spacing of the machine-readable signal are typically detected. Patent WO2012000568A1 proposes a method for detecting waveform amplitude and waveform spacing features by setting different peak trigger thresholds. Patent WO9008367A1 proposes a method for detecting waveform spacing features by acquiring the binary encoding sequence formed by the magnetic stripe width and spacing of the IMT encoded machine-readable signal. Patent CN112509209A proposes a method for detection based on at least two of the following magnetic feature data: magnetic wave period, magnetic wave amplitude, magnetic wave phase, and magnetic wave spacing.

[0005] Because the peak ratio of the positive half-wave to the negative half-wave is a fixed value when the machine-readable signal has an asymmetrical waveform characteristic of positive and negative half-waves, the above-mentioned method for detecting anti-counterfeiting components cannot detect anti-counterfeiting components with asymmetrical waveform characteristics of positive and negative half-cycles in the machine-readable signal.

[0006] In other words, existing anti-counterfeiting components with machine-readable signals exhibiting asymmetrical waveform characteristics of positive and negative half-cycles are difficult to detect. Summary of the Invention

[0007] The main objective of this invention is to provide a method for detecting anti-counterfeiting components, thereby solving the problem that anti-counterfeiting components with asymmetrical waveform characteristics of positive and negative half-cycles in the prior art are difficult to detect.

[0008] To achieve the above objectives, according to one aspect of the present invention, a method for detecting an anti-counterfeiting element is provided. The anti-counterfeiting element contains at least one magnetic region, and the magnetic region has a machine-readable signal with asymmetrical waveform characteristics of positive and negative half-cycles. The method for detecting the anti-counterfeiting element includes: step S1: acquiring the waveform characteristics of the machine-readable signal of the magnetic region; step S2: obtaining the peak value ratio of the magnetic region based on the waveform characteristics; and step S3: comparing the peak value ratio of the magnetic region with a standard peak value ratio to determine the detection result.

[0009] Furthermore, step S1 also includes: acquiring the amplitude of the waveform characteristics of the machine-readable signal of the magnetic region.

[0010] Furthermore, step S1 also includes: acquiring the peak of each positive half-wave and the trough of each negative half-wave of the waveform characteristics of the machine-readable signal of the magnetic region as the amplitude of the waveform characteristics.

[0011] Further, step S2 includes: obtaining the ratio of the peak of each positive half-wave to the trough of each negative half-wave in each magnetic region as the peak ratio.

[0012] Furthermore, step S3 also includes: if the deviation between the peak ratio of the magnetic region and the standard peak ratio is less than or equal to the threshold parameter, then the anti-counterfeiting element is genuine; if the deviation between the peak ratio of the magnetic region and the standard peak ratio is greater than the threshold parameter, then the anti-counterfeiting element is fake.

[0013] Furthermore, step S3 also includes: obtaining the percentage difference between the peak ratio of the magnetic region and the standard peak ratio; if the percentage difference is less than or equal to a threshold parameter, the anti-counterfeiting element is genuine; if the percentage difference is greater than the threshold parameter, the anti-counterfeiting element is fake; wherein, the percentage difference satisfies C=(|AB| / A)*100%, where A is the standard peak ratio, B is the peak ratio of the magnetic region, and C is the percentage difference.

[0014] Furthermore, step S3 also includes: selecting a threshold parameter of 20%.

[0015] Furthermore, step S1 also includes: magnetizing the anti-counterfeiting element through a magnetization unit; and obtaining the waveform characteristics of the machine-readable signal of the magnetic area through a magnetic sensor.

[0016] Furthermore, during the process of magnetizing the anti-counterfeiting element through the magnetization unit, a magnetization unit whose magnetization direction is at any angle to the anti-counterfeiting element is obtained as the magnetization unit.

[0017] Furthermore, in the process of obtaining the waveform characteristics of the machine-readable signal of the magnetic region through the magnetic sensor, one or more of the following are selected as magnetic sensors: coil magnetic sensor, AMR magnetic sensor, GMR magnetic sensor, and TMR magnetic sensor.

[0018] The anti-counterfeiting element in this application has a machine-readable signal with asymmetrical waveform characteristics of positive and negative half-cycles in its magnetic region. These asymmetrical waveform characteristics include waveforms where the amplitude values ​​of the positive and negative half-waves are different but the number of waveforms is the same, and waveforms where the amplitude values ​​of the positive and negative half-waves are different and the number of waveforms is also different. After obtaining the waveform characteristics of all magnetic regions on the anti-counterfeiting element, the peak value ratio of each magnetic region is obtained based on the waveform characteristics. The peak value ratio of the anti-counterfeiting element is then compared with a standard peak value ratio to determine the authenticity of the anti-counterfeiting element. The method in this application can quickly and accurately identify anti-counterfeiting elements with asymmetrical waveform characteristics of positive and negative half-cycles in their machine-readable signals. Attached Figure Description

[0019] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0020] Figure 1 A flowchart illustrating a method for detecting anti-counterfeiting elements according to an optional embodiment of the present invention is shown;

[0021] Figure 2 A waveform feature diagram of an anti-counterfeiting element according to an optional embodiment of the present invention is shown;

[0022] Figure 3 A waveform feature diagram of an anti-counterfeiting element according to another alternative embodiment of the present invention is shown.

[0023] The above figures include the following reference numerals:

[0024] 10. Anti-counterfeiting element; 21. First type of magnetic area; 22. Second type of magnetic area; 31. Third type of magnetic area; 32. Fourth type of magnetic area; 210. Machine-readable signal of the first type of magnetic area; 220. Machine-readable signal of the second type of magnetic area; 310. Machine-readable signal of the third type of magnetic area; 320. Machine-readable signal of the fourth type of magnetic area. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0027] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0028] To address the problem that anti-counterfeiting components with asymmetrical waveform characteristics of positive and negative half-cycles in existing technologies are difficult to detect, this invention provides a method for detecting anti-counterfeiting components.

[0029] like Figures 1 to 3 As shown, the detection method of the anti-counterfeiting element 10 has at least one magnetic region, and the magnetic region has a machine-readable signal with positive and negative half-cycle asymmetric waveform characteristics. The detection method of the anti-counterfeiting element includes: step S1: acquiring the waveform characteristics of the machine-readable signal of the magnetic region; step S2: obtaining the peak ratio of the magnetic region according to the waveform characteristics; step S3: comparing the peak ratio of the magnetic region with the standard peak ratio to determine the detection result.

[0030] The anti-counterfeiting element 10 in this application has a magnetic region containing machine-readable signals with asymmetrical waveform features of positive and negative half-cycles. These asymmetrical waveform features include waveform features where the amplitude values ​​of the positive and negative half-waves are different but the number of waveforms is the same, and waveform features where the amplitude values ​​of the positive and negative half-waves are different and the number of waveforms is also different. After obtaining the waveform features of all magnetic regions on the anti-counterfeiting element 10, the peak value ratio of each magnetic region is obtained based on the waveform features. The peak value ratio of the anti-counterfeiting element is then compared with the standard peak value ratio to determine the authenticity of the anti-counterfeiting element. The method in this application can quickly and accurately identify anti-counterfeiting elements with machine-readable signals exhibiting asymmetrical waveform features of positive and negative half-cycles.

[0031] Specifically, step S1 further includes: acquiring the amplitude of the waveform characteristics of the machine-readable signal in the magnetic region. The amplitude of the waveform characteristics is acquired, and then the peak-to-peak ratio is calculated based on the amplitude.

[0032] Specifically, step S1 further includes: acquiring the peak of each positive half-wave and the trough of each negative half-wave of the waveform characteristics of the machine-readable signal of the magnetic region as the amplitude of the waveform characteristics. Both the peak of the positive half-wave and the trough of the negative half-wave are used as amplitudes, and the ratio of the amplitude of the peak to the amplitude of the trough is used as the peak ratio.

[0033] Specifically, step S2 includes: obtaining the ratio of the peak value to the trough value of each positive half-wave in each magnetic region as the peak-to-trough ratio. A magnetic region may have multiple positive and multiple negative half-waves, requiring the calculation of the ratio of the amplitude of the peak value of each positive half-wave to the amplitude of the trough value of each negative half-wave. In other words, a magnetic region may have multiple peak-to-trough ratios. When calculating the peak-to-trough ratio, the peak-to-trough ratio of the waveform characteristics within each magnetic region should be calculated.

[0034] Specifically, step S3 further includes: if the deviation between the peak ratio of each magnetic region and the standard peak ratio is less than or equal to a threshold parameter, then the anti-counterfeiting element 10 is genuine; if the deviation between the peak ratio of each magnetic region and the standard peak ratio is greater than the threshold parameter, then the anti-counterfeiting element 10 is counterfeit. The deviation between the peak ratio of the magnetic region and the standard peak ratio can be the ratio of the peak ratio of the magnetic region to the standard peak ratio, the difference between the peak ratio of the magnetic region and the standard peak ratio, the variance between the peak ratio of the magnetic region and the standard peak ratio, or the covariance between the peak ratio of the magnetic region and the standard peak ratio.

[0035] In an optional embodiment, step S3 further includes: obtaining the percentage difference between the peak ratio of the magnetic region and the standard peak ratio; if the percentage difference is less than or equal to a threshold parameter, the anti-counterfeiting element 10 is genuine; if the percentage difference is greater than the threshold parameter, the anti-counterfeiting element 10 is fake; wherein, the percentage difference satisfies C=(|AB| / A)*100%, where A is the standard peak ratio, B is the peak ratio of the magnetic region, and C is the percentage difference.

[0036] It should be noted that the standard peak ratio is the peak ratio of the standard anti-counterfeiting element.

[0037] Specifically, step S3 also includes: selecting a threshold parameter of 20%. Due to the special structure of the anti-counterfeiting element, it cannot be guaranteed that the anti-counterfeiting element produced in each magnetic area is the same as the standard anti-counterfeiting element, resulting in a certain error between the peak ratio of the magnetic area and the standard peak ratio. However, the deviation between anti-counterfeiting elements produced using the same method will not be particularly large, hence the threshold parameter of 20% is selected.

[0038] In this embodiment, step S1 further includes: magnetizing the anti-counterfeiting element 10 through a magnetization unit; and obtaining the waveform characteristics of the machine-readable signal of the magnetic region through a magnetic sensor. After the magnetization unit magnetizes the anti-counterfeiting element 10, the anti-counterfeiting element 10 has a certain magnetic field strength, so that the magnetic sensor can obtain the waveform characteristics of the machine-readable signal.

[0039] It should be noted that the waveform characteristics obtained from different magnetic regions can be different or the same, depending on the actual application requirements.

[0040] Specifically, during the process of magnetizing the anti-counterfeiting element 10 through the magnetization unit, a magnetization unit whose magnetization direction is at any angle to the anti-counterfeiting element 10 is obtained as the magnetization unit.

[0041] Specifically, in the process of obtaining the waveform characteristics of the machine-readable signal of the magnetic region through the magnetic sensor, one or more of the following are selected as magnetic sensors: coil magnetic sensor, AMR magnetic sensor, GMR magnetic sensor, and TMR magnetic sensor.

[0042] The following is a detailed explanation with reference to the accompanying drawings.

[0043] The amplitude of the machine-readable signal of each magnetic region in the anti-counterfeiting element 10 is obtained by a magnetic detection device.

[0044] like Figure 2 In the specific embodiment shown, the anti-counterfeiting element 10 includes a first magnetic region 21 with different waveform amplitudes but the same number of waveforms in the positive and negative half-waves, and a second magnetic region 22 with the same waveform amplitudes in the positive and negative half-waves. After passing through the magnetization unit and magnetic sensor of the magnetic detection device, machine-readable signals 210 and 220 for the corresponding first and second magnetic regions are obtained. The amplitude of the machine-readable signal 210 for the first magnetic region is 3M. 21 M 21 The amplitude of the machine-readable signal 220 in the second magnetic region is M. 22 M 22 The peak ratio of the first magnetic region 21 is 3, and the peak ratio of the second magnetic region 22 is 1.

[0045] like Figure 3 In the specific embodiment shown, the anti-counterfeiting element 10 includes a third magnetic region 31 with different waveform amplitudes and different numbers of positive and negative half-waves, and a fourth magnetic region 32 with the same waveform amplitudes of positive and negative half-waves. After passing through the magnetization unit and magnetic sensor of the magnetic detection device, machine-readable signals 310 and 320 for the corresponding third and fourth magnetic regions are obtained. The amplitude of the machine-readable signal 310 for the third magnetic region is 3M. 31 M 31 2M 31 The amplitude of the machine-readable signal 320 in the fourth magnetic region is M. 32 M 32 The third type of magnetic region 31 has two troughs, so the peak ratio of the third type of magnetic region 31 is 3 / 3, and the peak ratio of the fourth type of magnetic region 32 is 1.

[0046] The peak ratio of each magnetic region is calculated based on the amplitude of the machine-readable signal in each region.

[0047] Once the amplitude of the machine-readable signal for each magnetic region is obtained, the peak-to-trough ratio for each region can be determined by calculating the ratio of the peak of each positive half-wave to the trough of each negative half-wave. This can be calculated using the following formula: Peak-to-trough ratio = Peak amplitude / Trough amplitude.

[0048] exist Figure 2 In the specific embodiment shown, the anti-counterfeiting element 10 includes two first magnetic regions 21 and one second magnetic region 22 from left to right, and the peak ratio of the magnetic regions of the anti-counterfeiting element 10 from left to right is 3, 3, 1.

[0049] exist Figure 3 In the specific embodiment shown, the anti-counterfeiting element 10 includes a third magnetic region 31 and a fourth magnetic region 32 from left to right, and the peak ratios of the magnetic regions of the anti-counterfeiting element 10 from left to right are 3, 3 / 2, and 1 respectively.

[0050] The calculated peak ratio of each magnetic region is compared with the standard peak ratio to determine the detection result.

[0051] The method to obtain the detection result by comparing the calculated peak ratio of all magnetic regions with the standard peak ratio can be as follows: obtain the percentage difference between the peak ratio of the magnetic region and the standard peak ratio; if the percentage difference is less than the threshold parameter, the anti-counterfeiting element 10 is genuine; if the percentage difference is greater than the threshold parameter, the anti-counterfeiting element 10 is fake; where the percentage difference satisfies C=(|AB| / A)*100%, A is the standard peak ratio, B is the peak ratio of the magnetic region, and C is the percentage difference.

[0052] In other words, it is true when the percentage difference is less than or equal to the threshold parameter value, and false when the percentage difference is greater than the threshold parameter value.

[0053] The technical solution provided in this embodiment first obtains the machine-readable signal amplitude of each magnetic region in the anti-counterfeiting element through a magnetic detection device, then calculates the peak value ratio of each magnetic region based on the machine-readable signal amplitude of each magnetic region, and finally compares the calculated peak value ratio of each magnetic region with the standard peak value ratio to determine the detection result. The technical solution provided in this application allows for the detection of the anti-counterfeiting element 10 when the anti-counterfeiting element has magnetic regions with asymmetrical waveform characteristics of positive and negative half-cycles, by reading the peak value ratio of the signal through a computer.

[0054] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0055] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0056] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0057] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting anti-counterfeiting elements, characterized in that, The anti-counterfeiting element has at least one magnetic region, the magnetic region containing machine-readable signals with asymmetrical waveform characteristics of positive and negative half-cycles, and the detection method of the anti-counterfeiting element includes: Step S1: Obtain the waveform characteristics of the machine-readable signal for each magnetic region; Step S2: Obtain the peak ratio of the magnetic region based on the waveform characteristics; Step S3: Compare the peak ratio of the magnetic region with the standard peak ratio to determine the detection result; Step S1 further includes: obtaining the amplitude of the waveform characteristics of the machine-readable signal of the magnetic region; Step S1 further includes: obtaining the peak of each positive half-wave and the trough of each negative half-wave of the waveform feature of the machine-readable signal of the magnetic region as the amplitude of the waveform feature; Step S2 includes: obtaining the ratio of the peak value to the trough value of each positive half-wave of each magnetic region as the peak value ratio; Step S3 further includes: If the deviation between the peak ratio of the magnetic region and the standard peak ratio is less than or equal to the threshold parameter, then the anti-counterfeiting element is genuine. If the deviation between the peak ratio of the magnetic region and the standard peak ratio is greater than the threshold parameter, then the anti-counterfeiting element is fake. Step S1 also includes: The anti-counterfeiting element is magnetized by a magnetization unit; The waveform characteristics of the machine-readable signal of the magnetic region are obtained through a magnetic sensor; During the process of magnetizing the anti-counterfeiting element through the magnetization unit, a magnetization unit whose magnetization direction is at any angle to the anti-counterfeiting element is obtained as the magnetization unit. In the process of obtaining the waveform characteristics of the machine-readable signal of the magnetic region through the magnetic sensor, one or more of the following are selected as the magnetic sensor: coil magnetic sensor, AMR magnetic sensor, GMR magnetic sensor, and TMR magnetic sensor.

2. The method for detecting anti-counterfeiting elements according to claim 1, characterized in that, Step S3 further includes: Obtain the percentage difference between the peak ratio of the magnetic region and the standard peak ratio; If the percentage difference is less than or equal to the threshold parameter, then the anti-counterfeiting element is genuine; If the percentage difference is greater than the threshold parameter, then the anti-counterfeiting element is fake; Wherein, the percentage difference satisfies C=(|AB| / A)*100%, where A is the standard peak ratio, B is the peak ratio of the magnetic region, and C is the percentage difference.

3. The method for detecting anti-counterfeiting elements according to claim 2, characterized in that, Step S3 further includes: selecting the threshold parameter as 20%.

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