Anti-counterfeiting element and anti-counterfeiting product

Abstract

The application provides a kind of anti-counterfeiting element and anti-counterfeiting product.The anti-counterfeiting element includes: a substrate; at least three magnetic coding regions, at least three magnetic coding regions are arranged on the same surface or a set of opposite surfaces of the substrate; wherein, when the anti-counterfeiting element is processed along a preset magnetization direction using a magnetic field with a magnetic field strength greater than that of the three magnetic coding regions, a magnetic sensor is used to detect the signals generated by the at least three magnetic coding regions, wherein the signal pulses generated by at least two magnetic coding regions are oriented in opposite directions, and the signals generated by the at least two magnetic coding regions are in a proportional relationship.The application solves the problem of poor anti-counterfeiting information concealment, production and application difficulty of the anti-counterfeiting element in the prior art.

Description

Technical Field

[0001] This invention relates to the field of anti-counterfeiting technology, and more specifically, to an anti-counterfeiting element and an anti-counterfeiting product. Background Technology

[0002] Currently, magnetic materials are widely used in the field of anti-counterfeiting technology. Existing technology proposes an anti-counterfeiting element that alternates between magnetic and non-magnetic regions on a security thread. A magnetic sensor can detect the magnetic coding sequence, and multiple coding sequences can be constructed by controlling the geometric dimensions of the magnetic and non-magnetic regions. The signal strength of the magnetic regions can be detected by the magnetic sensor. The setting of the coding sequence and the level of remanence improves the anti-counterfeiting level and reduces production difficulty. However, the magnetic codes detected by the magnetic sensor are all of a single orientation, making them easy to counterfeit.

[0003] Existing technology also provides an anti-counterfeiting element that utilizes a first magnetic material to form a magnetic code, which includes spaced magnetic and non-magnetic regions. A second magnetic material is then used to fill the non-magnetic regions. A magnetic sensor can detect the magnetic code sequence. Due to the presence of two coercive magnetic materials, after two magnetization processes using two magnetization devices with opposite orientations, the two magnetic materials have opposite orientations. It can be seen that obtaining opposite orientations is a complex and difficult process, requiring two magnetic materials, two magnetic fields, and two magnetization processes. This poses significant challenges to the production and detection of the magnetic code.

[0004] Existing technologies also propose a method for obtaining asymmetric waveforms using magnetic encoding. The signal waveform detected by the magnetic sensor is a half-wave sine wave and an asymmetric sine wave. However, regardless of the form, due to limitations in plate-making, printing and other process conditions, only half-wave or asymmetric sine waves with the same pulse direction can be obtained. Half-wave or asymmetric sine waves with opposite orientations cannot be obtained. This makes the magnetic encoding also easy to counterfeit.

[0005] Existing technology also proposes a magnetic coding area containing one or more magnetic structures whose easy magnetization axis is perpendicular to the surface of the substrate. Anti-counterfeiting can be achieved by combining the remanence, coercivity, and magnetic orientation of the magnetic structure. However, the magnetic orientation refers to the orientation of the easy magnetization axis of the magnetic particles. Matching the magnetization direction parallel to the easy magnetization axis yields waveform information under different easy magnetization axes; however, the phase of the obtained waveform does not exhibit any change in orientation.

[0006] Furthermore, in known technologies, the pulse orientation of magnetic encoding is singular and varies with the strength and direction of the external magnetic field, being closely related to the type of magnetic material (coercivity property), magnetic field strength, and magnetization direction. To obtain characteristics with opposite orientations, at least two magnetic materials must be used, and the manufacturing process is complex and testing is difficult.

[0007] In other words, existing anti-counterfeiting components suffer from poor concealment of anti-counterfeiting information and difficulties in production and application. Summary of the Invention

[0008] The main objective of this invention is to provide an anti-counterfeiting element and anti-counterfeiting product to solve the problems of poor concealment of anti-counterfeiting information and difficulty in production and application of existing anti-counterfeiting elements.

[0009] To achieve the above objectives, according to one aspect of the present invention, an anti-counterfeiting element is provided, comprising: a substrate; at least three magnetic coding regions, wherein the at least three magnetic coding regions are spaced apart on the same surface of the substrate or on a set of opposite surfaces; wherein, when the anti-counterfeiting element is processed along a preset magnetization direction using a magnetic field with a magnetic field strength greater than that of the three magnetic coding regions, a magnetic sensor is used to detect the signals generated by the at least three magnetic coding regions, wherein the signal pulses generated by at least two magnetic coding regions have opposite orientations, and the signals generated by the at least two magnetic coding regions are proportional.

[0010] Furthermore, the signal includes a sinusoidal waveform signal, which is detected by a magnetic sensor to form a binary code, which includes 1 and 0.

[0011] Furthermore, the maximum amplitude value corresponding to the signal in at least one of the three magnetic coding regions is twice the maximum amplitude value corresponding to the signal in the other magnetic coding region.

[0012] Furthermore, the preset magnetization direction includes a first magnetization direction and a second magnetization direction. The three magnetic coding regions are arranged at intervals along a straight line. The detection direction of the magnetic sensor is the same as the arrangement direction of the magnetic coding regions. The arrangement direction of the magnetic coding regions is parallel to the first magnetization direction; and / or the arrangement direction of the magnetic coding regions is perpendicular to the second magnetization direction.

[0013] Furthermore, at least three magnetic coding regions include a first magnetic coding region, a second magnetic coding region, and a third magnetic coding region. The signal includes a sine wave of at least half a cycle. When the magnetic field moves along the first magnetization direction, the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region, the negative peak of the magnetic induction electromotive force curve of the second magnetic coding region, and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region are equal. And / or when the magnetic field moves along the second magnetization direction, the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the negative peak of the magnetic induction electromotive force curve of the first magnetic coding region, the positive peak of the magnetic induction electromotive force curve of the second magnetic coding region, and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region are equal.

[0014] Furthermore, at least three magnetic coding regions include a first magnetic coding region, a second magnetic coding region, and a third magnetic coding region. The signal includes a sine wave of at least half a cycle. When the magnetic field moves along the first magnetization direction, the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region, the negative peak of the magnetic induction electromotive force curve of the second magnetic coding region, and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region are equal. And / or when the magnetic field moves along the second magnetization direction, the magnetic sensor detects that the absolute value of the amplitude corresponding to the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region is twice the absolute value of the amplitude corresponding to the negative peak of the magnetic induction electromotive force curve of the first magnetic coding region, and the amplitude corresponding to the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region is twice the amplitude corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region.

[0015] Furthermore, at least three magnetic coding regions use the same magnetic material, which is ferrite.

[0016] Furthermore, the magnetic materials used in the three magnetic coding regions include at least two types, and at least one of the two magnetic materials has induced magnetic anisotropy during the magnetic field processing.

[0017] Furthermore, at least two of the three magnetic coding regions have cross-sections that are perpendicularly mirror images of each other along the first magnetization direction, and the cross-sectional shape of each magnetic coding region along the first magnetization direction includes one or more of trapezoids and triangles; and / or the top view of at least two of the three magnetic coding regions is rectangular.

[0018] Furthermore, the top views of at least two of the three magnetic coding regions are vertically mirrored, and the top view shape of each magnetic coding region includes one or more of trapezoidal, triangular, square, and rectangular shapes.

[0019] Furthermore, the substrate includes one of paper and film.

[0020] Furthermore, the length of each magnetic coding area is greater than or equal to 1.5 mm and less than or equal to 7.0 mm; and / or the width of each magnetic coding area is greater than or equal to 0.5 mm and less than or equal to 8 mm.

[0021] According to another aspect of the present invention, an anti-counterfeiting product is provided, comprising the anti-counterfeiting elements described above.

[0022] Furthermore, anti-counterfeiting elements are incorporated into anti-counterfeiting products in the form of windows or fully embedded components.

[0023] Furthermore, anti-counterfeiting products include one of the following: banknotes, banknotes, tickets, certificates, documents, and credit cards.

[0024] According to the technical solution of the present invention, the anti-counterfeiting element includes a substrate and at least three magnetic coding regions, which are spaced apart on the same surface or a set of opposite surfaces of the substrate; wherein, when the anti-counterfeiting element is processed along a preset magnetization direction using a magnetic field with a magnetic field strength greater than that of the three magnetic coding regions, a magnetic sensor is used to detect the signals generated by the at least three magnetic coding regions, wherein the signal pulses generated by at least two magnetic coding regions have opposite orientations, and the signals generated by at least two magnetic coding regions are proportional.

[0025] By setting a substrate, the substrate provides positions for at least three magnetic coding areas, improving the reliability of the magnetic coding areas and ensuring the normal operation of the anti-counterfeiting element. The signal pulses generated by at least two magnetic coding areas have opposite orientations, and these opposite signals are inherent, not caused by the movement direction or magnetic field strength of the magnetizing device. This overcomes the vulnerability of magnetic coding areas to counterfeiting. Furthermore, the signals generated by at least two magnetic coding areas are proportional, making the anti-counterfeiting element difficult to counterfeit, further enhancing the concealment of magnetic coding information and its anti-counterfeiting capabilities. In addition, the anti-counterfeiting element of this application has the advantages of simple manufacturing process, high information concealment of the magnetic coding areas, and easy detection and identification, greatly improving the anti-counterfeiting level and thus significantly enhancing the anti-counterfeiting properties of the anti-counterfeiting element. This also reduces the production difficulty of the magnetic coding areas, avoids complex and cumbersome production processes, and lowers costs. Attached Figure Description

[0026] 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:

[0027] Figure 1 A schematic diagram of the anti-counterfeiting element according to Embodiment 1 of the present invention and a signal diagram detected by a magnetic sensor are shown.

[0028] Figure 2 A schematic diagram of the anti-counterfeiting element according to Embodiment 2 of the present invention and a signal diagram detected by a magnetic sensor are shown.

[0029] The above figures include the following reference numerals:

[0030] 10. Substrate; 20. First magnetic coding area; 30. Second magnetic coding area; 40. Third magnetic coding area; 50. First magnetization direction. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] To address the problems of poor concealment of anti-counterfeiting information and difficulties in production and application of existing anti-counterfeiting elements, this invention provides an anti-counterfeiting element and an anti-counterfeiting product.

[0035] like Figure 1 and Figure 2As shown, the anti-counterfeiting element includes a substrate 10 and at least three magnetic coding regions, which are spaced apart on the same surface of the substrate 10. When the anti-counterfeiting element is processed along a preset magnetization direction using a magnetic field with a magnetic field strength greater than that of the three magnetic coding regions, a magnetic sensor is used to detect the signals generated by the at least three magnetic coding regions. The signal pulses generated by at least two magnetic coding regions have opposite orientations, and the signals generated by the at least two magnetic coding regions are proportional.

[0036] By setting the substrate 10, at least three magnetic coding areas are provided with mounting positions, improving the reliability of the magnetic coding areas and ensuring the normal operation of the anti-counterfeiting element. The signal pulses generated by at least two magnetic coding areas have opposite orientations, and these opposite signals are inherent, not caused by the direction of magnetic field movement or the strength of the magnetic field. This overcomes the vulnerability of magnetic coding areas to counterfeiting. Furthermore, the signals generated by at least two magnetic coding areas are proportional, making the anti-counterfeiting element difficult to counterfeit. This further enhances the concealment of the magnetic coding information and the anti-counterfeiting capability of the anti-counterfeiting element. In addition, the anti-counterfeiting element of this application has the advantages of simple manufacturing process, high information concealment of the magnetic coding areas, and easy detection and identification, greatly improving the anti-counterfeiting level and thus significantly enhancing the anti-counterfeiting performance of the anti-counterfeiting element. This significantly improves the anti-counterfeiting performance of securities. Simultaneously, it reduces the production difficulty of the magnetic coding areas, avoids complex and cumbersome production processes, and reduces costs.

[0037] In an embodiment not shown in the figure, at least three magnetic coding regions may also be disposed on a set of opposing surfaces of the substrate 10; including two magnetic coding regions of the three magnetic coding regions being disposed at intervals on the same surface of the substrate 10, and another magnetic coding region being disposed on a surface opposite to the first surface. Of course, the projection of the other magnetic coding region on the substrate may be located in the middle of the two magnetic coding regions or on both sides of the two magnetic coding regions.

[0038] Specifically, the signal includes a sinusoidal waveform signal, which is detected by a magnetic sensor to form a binary code, including 1s and 0s. The key to this invention is the use of a magnetic sensor to detect the sinusoidal waveform signal formed by the magnetic coding region, forming a binary code of 1s and 0s based on the changing orientation of the sinusoidal waveform signal, unaffected by changes in the magnetic field. Furthermore, when the magnetic field moves along either the first magnetization direction 50 or the second magnetization direction, the sinusoidal waveform signals formed by at least two of the three magnetic coding regions exhibit a proportional relationship, which can be identified using a magnetic sensor.

[0039] like Figure 1 and Figure 2 As shown, when the magnetic induction electromotive force curve corresponding to the magnetic coding area is rising, the binary code output by the magnetic sensor after recognition is 0; when the magnetic induction electromotive force curve corresponding to the magnetic coding area is falling, the binary code output by the magnetic sensor after recognition is 1. It can also be understood that if the amplitude of the magnetic induction electromotive force curve corresponding to the leftmost part of the magnetic coding area is negative, the binary code output by the magnetic sensor after recognition is 0; if the amplitude of the magnetic induction electromotive force curve corresponding to the leftmost part of the magnetic coding area is positive, the binary code output by the magnetic sensor after recognition is 1.

[0040] It should be noted that the magnetic field mentioned above can be the magnetic field of a magnet, and the ratio mentioned above can be 1:1 or 1:2.

[0041] It should be noted that the above sinusoidal waveform signal is a sinusoidal waveform signal with at least half a cycle.

[0042] like Figure 1 and Figure 2 As shown, the preset magnetization directions include a first magnetization direction 50 and a second magnetization direction. Three magnetic coding regions are arranged at intervals along a straight line on the same surface of the substrate 10. The detection direction of the magnetic sensor is the same as the arrangement direction of the magnetic coding regions. The arrangement direction of the magnetic coding regions is parallel to the first magnetization direction 50 and perpendicular to the second magnetization direction. In the figure, the X-axis direction is the first magnetization direction 50, and the Z-axis direction is the second magnetization direction.

[0043] Specifically, at least two of the three magnetic coding regions have a perpendicular mirror relationship in cross-section along the first magnetization direction 50, and the cross-sectional shape of each magnetic coding region along the first magnetization direction 50 includes one or more of trapezoids and triangles; the top view of at least two of the three magnetic coding regions is rectangular.

[0044] Specifically, the top views of at least two of the three magnetic coding regions are vertically mirrored, and the top view shape of each magnetic coding region includes one or more of the following: trapezoid, triangle, square, and rectangle.

[0045] like Figure 1 The diagram shown is a schematic diagram of the anti-counterfeiting element according to Embodiment 1 of the present invention and a signal diagram detected by the magnetic sensor. Figure 1From top to bottom, the diagram shows a schematic diagram of the anti-counterfeiting element, a top view of the magnetic coding area of ​​the anti-counterfeiting element, the binary code corresponding to the magnetic coding area, the magnetic induction electromotive force curve of the anti-counterfeiting element after magnetization along the first magnetization direction 50, and the magnetic induction electromotive force curve of the anti-counterfeiting element after magnetization along the second magnetization direction. The schematic diagram shows at least three magnetic coding areas: a first magnetic coding area 20, a second magnetic coding area 30, and a third magnetic coding area 40, which are sequentially spaced on the upper surface of the substrate 10. The top view of the magnetic coding area shows that the first magnetic coding area 20, the second magnetic coding area 30, and the third magnetic coding area 40 are regular rectangles. However, in embodiments not shown in the figure, the top view can also be a square. This ensures that the top views of the three magnetic coding areas are indistinguishable from those of conventional magnetic areas, eliminating shape differences and further enhancing the concealment of the magnetic coding area information.

[0046] like Figure 1 As shown, after magnetization along the first magnetization direction 50 or the second magnetization direction, the amplitude of the magnetic induced electromotive force (EMF) corresponding to the leftmost position of the first magnetic coding region 20 is negative, and the EMF curve from the leftmost to the rightmost position of the first magnetic coding region 20 is in an upward trend. Therefore, the binary code output by the magnetic sensor recognizing the EMF curve of the first magnetic coding region 20 is 0. After magnetization along the first magnetization direction 50 or the second magnetization direction, the amplitude of the magnetic induced EMF corresponding to the leftmost position of the second magnetic coding region 30 is positive, and the EMF curve from the leftmost to the rightmost position of the second magnetic coding region 30 is in a downward trend. Therefore, the binary code output by the magnetic sensor recognizing the EMF curve of the second magnetic coding region 30 is 1. After magnetization by a magnetic field along the first magnetization direction 50 or the second magnetization direction, the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the third magnetic coding region 40 is positive, and the magnetic induced electromotive force curve corresponding to the leftmost to the rightmost position of the third magnetic coding region 40 is in a downward state. Therefore, the binary code output by the magnetic sensor to identify the magnetic induced electromotive force curve of the third magnetic coding region 40 is 1.

[0047] like Figure 1As shown, after magnetization along the first magnetization direction 50, the magnetic induction electromotive force curves corresponding to the first magnetic coding region 20 and the second magnetic coding region 30 have opposite phase orientations, and the time ratio of the first magnetic coding region 20, the second magnetic coding region 30, and the third magnetic coding region is 2:2:1. After magnetization along the second magnetization direction, the magnetic induction electromotive force curves corresponding to the first magnetic coding region 20 and the second magnetic coding region 30 have opposite phase orientations, and the time ratio of the first magnetic coding region 20, the second magnetic coding region 30, and the third magnetic coding region is 2:2:1.

[0048] like Figure 1 As shown, the signal comprises a sinusoidal waveform of at least half a cycle, which is the waveform of the magnetic induction electromotive force curve. The maximum amplitude of the signal in at least one of the three magnetic coding regions is twice the maximum amplitude of the signal in the other magnetic coding region.

[0049] like Figure 1 As shown, at least three magnetic coding regions include a first magnetic coding region 20, a second magnetic coding region 30, and a third magnetic coding region 40. When the magnetic field moves along the first magnetization direction 50, the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region 20, the negative peak of the magnetic induction electromotive force curve of the second magnetic coding region 30, and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region 40 are equal. That is, the ratio between the absolute values ​​of the amplitudes corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region 20, the negative peak of the magnetic induction electromotive force curve of the second magnetic coding region 30, and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region 40 is 1:1:1. Of course, the amplitudes corresponding to the positive peaks of the magnetic induction electromotive force curves of the three magnetic coding regions are equal, and the amplitudes corresponding to the negative peaks of the magnetic induction electromotive force curves of the three magnetic coding regions are also equal. It should be noted that the above equality may include cases that are approximately equal.

[0050] like Figure 1As shown, when the magnetic field moves along the second magnetization direction, the absolute value of the amplitude corresponding to the positive peak of the magnetic induced electromotive force curve of the third magnetic coding region 40 detected by the magnetic sensor is twice the absolute value of the amplitude corresponding to the negative peak of the magnetic induced electromotive force curve of the first magnetic coding region 20. The amplitude corresponding to the positive peak of the magnetic induced electromotive force curve of the third magnetic coding region 40 is also twice the amplitude corresponding to the positive peak of the magnetic induced electromotive force curve of the first magnetic coding region 20. The ratio of the amplitudes corresponding to the positive peaks of the magnetic induced electromotive force curves of the first magnetic coding region 20, the second magnetic coding region 30, and the third magnetic coding region 40 is 1:1:2. The ratio of the amplitudes corresponding to the negative peaks of the magnetic induced electromotive force curves of the first magnetic coding region 20, the second magnetic coding region 30, and the third magnetic coding region 40 is also 1:1:2.

[0051] like Figure 2 The diagram shown is a schematic diagram of the anti-counterfeiting element of Embodiment 2 of the present invention and a signal diagram detected by the magnetic sensor. Figure 2 From top to bottom, the diagram shows a schematic diagram of the anti-counterfeiting element, a top view of the magnetic coding area of ​​the anti-counterfeiting element, the binary code corresponding to the magnetic coding area, the magnetic induction electromotive force curve of the anti-counterfeiting element after magnetization along the first magnetization direction 50, and the magnetic induction electromotive force curve of the anti-counterfeiting element after magnetization along the second magnetization direction. The schematic diagram shows at least three magnetic coding areas: a first magnetic coding area 20, a second magnetic coding area 30, and a third magnetic coding area 40, which are sequentially spaced on the upper surface of the substrate 10. The top view of the magnetic coding area shows that the first magnetic coding area 20, the second magnetic coding area 30, and the third magnetic coding area 40 are regular rectangles. However, in embodiments not shown in the figure, the top view can also be a square. This ensures that the top views of the three magnetic coding areas are indistinguishable from those of conventional magnetic areas, eliminating shape differences and further enhancing the concealment of the magnetic coding area information.

[0052] like Figure 2As shown, after magnetization along the first magnetization direction 50 or the second magnetization direction, the amplitude of the magnetic induced electromotive force (EMF) corresponding to the leftmost position of the first magnetic coding region 20 is negative, and the EMF curve from the leftmost to the rightmost position of the first magnetic coding region 20 is in an upward trend. Therefore, the binary code output by the magnetic sensor recognizing the EMF curve of the first magnetic coding region 20 is 0. After magnetization along the first magnetization direction 50 or the second magnetization direction, the amplitude of the magnetic induced EMF corresponding to the leftmost position of the second magnetic coding region 30 is positive, and the EMF curve from the leftmost to the rightmost position of the second magnetic coding region 30 is in a downward trend. Therefore, the binary code output by the magnetic sensor recognizing the EMF curve of the second magnetic coding region 30 is 1. After magnetization by a magnetic field along the first magnetization direction 50 or the second magnetization direction, the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the third magnetic coding region 40 is positive, and the magnetic induced electromotive force curve corresponding to the leftmost to the rightmost position of the third magnetic coding region 40 is in a downward state. Therefore, the binary code output by the magnetic sensor to identify the magnetic induced electromotive force curve of the third magnetic coding region 40 is 1.

[0053] like Figure 2 As shown, after magnetization along the first magnetization direction 50, the magnetic induction electromotive force curves corresponding to the first magnetic coding region 20 and the second magnetic coding region 30 have opposite phase orientations, and the time ratio of the first magnetic coding region 20, the second magnetic coding region 30, and the third magnetic coding region is 2:2:1. After magnetization along the second magnetization direction, the magnetic induction electromotive force curves corresponding to the first magnetic coding region 20 and the second magnetic coding region 30 have opposite phase orientations, and the time ratio of the first magnetic coding region 20, the second magnetic coding region 30, and the third magnetic coding region is 2:2:1.

[0054] like Figure 2 As shown, the signal comprises a sinusoidal waveform of at least half a cycle, which is the waveform of the magnetic induction electromotive force curve. The maximum amplitude of the signal in at least one of the three magnetic coding regions is twice the maximum amplitude of the signal in the other magnetic coding region.

[0055] like Figure 2As shown, at least three magnetic coding regions include a first magnetic coding region 20, a second magnetic coding region 30, and a third magnetic coding region 40. When the magnetic field moves along the first magnetization direction 50, the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region 20, the negative peak of the magnetic induction electromotive force curve of the second magnetic coding region 30, and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region 40 are equal. That is, the ratio between the absolute values ​​of the amplitudes corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region 20, the negative peak of the magnetic induction electromotive force curve of the second magnetic coding region 30, and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region 40 is 1:1:1. Meanwhile, as shown in the figure, the ratio of the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the first magnetic coding region 20, the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the second magnetic coding region 30, and the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the third magnetic coding region 40 is 2:2:1; the ratio of the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the rightmost position of the first magnetic coding region 20, the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the rightmost position of the second magnetic coding region 30, and the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the rightmost position of the third magnetic coding region 40 is 1:1:1.

[0056] like Figure 2As shown, after the magnetic field moves along the second magnetization direction, the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the negative peak of the magnetic induced electromotive force curve in the first magnetic coding region 20, the positive peak of the magnetic induced electromotive force curve in the second magnetic coding region 30, and the positive peak of the magnetic induced electromotive force curve in the third magnetic coding region 40 are equal. That is, the ratio between the absolute values ​​of the amplitudes corresponding to the negative peak of the magnetic induced electromotive force curve in the first magnetic coding region 20, the positive peak of the magnetic induced electromotive force curve in the second magnetic coding region 30, and the positive peak of the magnetic induced electromotive force curve in the third magnetic coding region 40 is 1:1:1. Meanwhile, as shown in the figure, the ratio of the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the first magnetic coding region 20, the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the second magnetic coding region 30, and the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the leftmost position of the third magnetic coding region 40 is 1:1:1; the ratio of the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the rightmost position of the first magnetic coding region 20, the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the rightmost position of the second magnetic coding region 30, and the absolute value of the amplitude of the magnetic induced electromotive force corresponding to the rightmost position of the third magnetic coding region 40 is 1:1:2.

[0057] Specifically, at least three magnetic coding regions use the same magnetic material, which is a ferrite material that exhibits induced magnetic anisotropy during magnetic field processing.

[0058] In an embodiment not shown in the figure, the magnetic materials used in the three magnetic coding regions include at least two types, and at least one of the two magnetic materials exhibits induced magnetic anisotropy during magnetic field processing. The magnetic materials used in the three magnetic coding regions can be selected according to the actual situation.

[0059] Specifically, the substrate 10 includes either paper or film, which can be selected according to actual needs.

[0060] Specifically, the length of each magnetic coding area is greater than or equal to 1.5 mm and less than or equal to 7.0 mm; the width of each magnetic coding area is greater than or equal to 0.5 mm and less than or equal to 8 mm. The size of each magnetic coding area can be selected according to the actual situation, as long as the thickness of the three magnetic coding areas is equal.

[0061] This invention also provides an anti-counterfeiting product, including the aforementioned anti-counterfeiting elements. The anti-counterfeiting elements are disposed within the anti-counterfeiting product in a windowed or fully embedded manner. Specifically, the anti-counterfeiting product includes one of banknotes, bank drafts, tickets, certificates, documents, and credit cards. Anti-counterfeiting products with the aforementioned anti-counterfeiting elements have the advantages of high concealment, high security, strong anti-counterfeiting performance, and simple manufacturing process.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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. An anti-counterfeiting element, characterized in that, include: Substrate (10); At least three magnetic coding regions are spaced apart on the same surface or a set of opposite surfaces of the substrate (10); When the anti-counterfeiting element is processed along a preset magnetization direction using a magnetic field with a magnetic field strength greater than that of the three magnetic coding regions, the preset magnetization direction includes a first magnetization direction (50) and a second magnetization direction. The three magnetic coding regions are arranged at intervals along a straight line. The detection direction of the magnetic sensor is the same as the arrangement direction of the magnetic coding regions. The arrangement direction of the magnetic coding regions is parallel to the first magnetization direction (50) and perpendicular to the second magnetization direction. The magnetic sensor detects the signals generated by at least three magnetic coding regions. The signal pulse orientations generated by at least two magnetic coding regions in the same magnetization direction are opposite, and the signals generated by at least two magnetic coding regions are proportional. At least one magnetic material of the magnetic coding region has induced magnetic anisotropy during the processing of the magnetic field. At least two of the three magnetic coding regions are perpendicularly mirror images of each other along the first magnetization direction (50), and the cross-sectional shape of each magnetic coding region along the first magnetization direction (50) includes one or more of trapezoids and triangles; and the top view of at least two of the three magnetic coding regions is rectangular; At least three magnetic coding regions include a first magnetic coding region (20), a second magnetic coding region (30), and a third magnetic coding region (40). The signal includes a sine wave of at least half a cycle, with the positive peak being the peak of the magnetic induction electromotive force curve on the +Y axis and the negative peak being the peak of the magnetic induction electromotive force curve on the -Y axis. When the magnetic field moves along the first magnetization direction (50), the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region (20), the negative peak of the magnetic induction electromotive force curve of the second magnetic coding region (30), and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region (40) are equal. When the magnetic field moves along the second magnetization direction, the magnetic sensor detects that the amplitude corresponding to the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region (40) is twice the amplitude corresponding to the positive peak of the magnetic induction electromotive force curve of the first magnetic coding region (20).

2. The anti-counterfeiting element according to claim 1, characterized in that, The signal includes a sinusoidal waveform signal, which is detected by the magnetic sensor to form a binary code, the binary code including 1 and 0.

3. The anti-counterfeiting element according to claim 1, characterized in that, The maximum amplitude value corresponding to the signal of at least one of the three magnetic coding regions is twice the maximum amplitude value corresponding to the signal of the other magnetic coding region.

4. The anti-counterfeiting element according to claim 1, characterized in that, When the magnetic field moves along the second magnetization direction, the magnetic sensor detects that the absolute values ​​of the amplitudes corresponding to the negative peak of the magnetic induction electromotive force curve of the first magnetic coding region (20), the positive peak of the magnetic induction electromotive force curve of the second magnetic coding region (30), and the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region (40) are equal.

5. The anti-counterfeiting element according to claim 1, characterized in that, When the magnetic field moves along the second magnetization direction, the magnetic sensor detects that the absolute value of the amplitude corresponding to the positive peak of the magnetic induction electromotive force curve of the third magnetic coding region (40) is twice the absolute value of the amplitude corresponding to the negative peak of the magnetic induction electromotive force curve of the first magnetic coding region (20).

6. The anti-counterfeiting element according to claim 1, characterized in that, At least three of the magnetic coding regions use the same magnetic material, which is a ferrite material.

7. The anti-counterfeiting element according to claim 1, characterized in that, The magnetic materials used in the three magnetic coding regions include at least two types, and at least one of the two magnetic materials has induced magnetic anisotropy during the processing of the magnetic field.

8. The anti-counterfeiting element according to claim 1, characterized in that, The top views of at least two of the three magnetic coding regions are vertically mirrored, and the top view shape of each magnetic coding region includes one or more of trapezoidal, triangular, square and rectangular shapes.

9. The anti-counterfeiting element according to claim 1, characterized in that, The substrate (10) includes one of paper and film.

10. The anti-counterfeiting element according to claim 1, characterized in that, The length of each of the magnetically encoded regions is greater than or equal to 1.5 mm and less than or equal to 7.0 mm; and / or The width of each magnetic coding region is greater than or equal to 0.5 mm and less than or equal to 8 mm.

11. An anti-counterfeiting product, characterized in that, Includes the anti-counterfeiting element as described in any one of claims 1 to 10.

12. The anti-counterfeiting product according to claim 11, characterized in that, The anti-counterfeiting element is installed in the anti-counterfeiting product in a windowed or fully embedded manner.

13. The anti-counterfeiting product according to claim 11, characterized in that, The anti-counterfeiting products include one of the following: banknotes, bank notes, tickets, certificates, documents, and credit cards.

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