Method for detecting a security element and security detection structure

Abstract

The application provides a detection method and a security detection structure for a security element, the security element comprising a plurality of magnetic regions, at least one of the magnetic regions having an easy magnetization axis, the direction of the easy magnetization axis being perpendicular to the surface of the substrate of the security element, or the direction of the easy magnetization axis being parallel to the surface of the substrate and forming an acute angle or an obtuse angle with the length direction of the substrate, the detection method comprising: step S10, magnetizing the security element by using a magnetizing element with a magnetic field strength greater than the coercive force strength of the plurality of magnetic regions, so that the magnetization of the plurality of magnetic regions is arranged along the magnetization direction; step S20, obtaining a sensor, the sensor detecting the security element along a direction perpendicular to the magnetization direction of the magnetizing element, and obtaining a magnetic signal of the security element; and step S30, determining the direction of the easy magnetization axis of each magnetic region according to the magnetic signal. The application solves the problem that the direction of the easy magnetization axis of the security element in the prior art is not easy to detect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anti-counterfeiting equipment, in particular to an anti-counterfeiting element detection method and an anti-counterfeiting detection structure. BACKGROUND

[0002] In order to improve the anti-counterfeiting level of valuable securities and effectively resist the counterfeiting of counterfeiters, more and more anti-counterfeiting elements are applied to valuable securities. Unlike traditional anti-counterfeiting elements containing only magnetic regions with no easy magnetization axis, new anti-counterfeiting elements containing magnetic regions with easy magnetization axis have higher anti-counterfeiting level and can carry more anti-counterfeiting information. Patent CN103729931 discloses a new anti-counterfeiting element containing a magnetic coding region with an easy magnetization axis perpendicular to the surface of the substrate, and patent US20160042265 discloses a new anti-counterfeiting element containing a magnetic coding region with an easy magnetization axis at an angle of 20° or 120° with the length direction of the substrate. These new anti-counterfeiting elements effectively improve the anti-counterfeiting level of valuable securities.

[0003] Patents CN103971443 and CN106570978 propose to detect new anti-counterfeiting elements by using vertical magnetization elements and horizontal magnetization elements to identify the direction of the easy magnetization axis of the magnetic region. However, these methods can only partially detect the magnetic region with the easy magnetization axis perpendicular to the surface of the substrate, and cannot identify the magnetic region with the easy magnetization axis in other directions. Moreover, two magnetization elements, vertical magnetization and horizontal magnetization, need to be provided on the detection device, which increases the detection cost of these new anti-counterfeiting elements.

[0004] That is, the prior art anti-counterfeiting element has the problem that the direction of the easy magnetization axis is not easy to detect. SUMMARY

[0005] The main purpose of the present application is to provide an anti-counterfeiting element detection method and an anti-counterfeiting detection structure to solve the problem that the direction of the easy magnetization axis of the prior art anti-counterfeiting element is not easy to detect.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present application, an anti-counterfeiting element detection method is provided, the anti-counterfeiting element comprising a plurality of magnetic regions, at least one magnetic region having an easy magnetization axis, the direction of the easy magnetization axis being perpendicular to the surface of the substrate of the anti-counterfeiting element, or the direction of the easy magnetization axis being parallel to the surface of the substrate and forming an acute angle or an obtuse angle with the length direction of the substrate, the anti-counterfeiting element detection method comprising: step S10: using a magnetization element with a magnetic field strength greater than the coercive force strength of the plurality of magnetic regions to magnetize the anti-counterfeiting element, so that the magnetization of the plurality of magnetic regions is arranged along the magnetization direction; step S20: obtaining a sensor, the sensor detecting the anti-counterfeiting element along a direction perpendicular to the magnetization direction of the magnetization element to obtain a magnetic signal of the anti-counterfeiting element; and step S30: determining the direction of the easy magnetization axis of each magnetic region according to the magnetic signal.

[0007] Further, in step S10, the magnetizing element magnetizes the security element along a magnetization direction parallel to the length direction of the substrate.

[0008] Further, in step S10, the magnetizing element magnetizes the security element along a magnetization direction perpendicular to the length direction of the substrate.

[0009] Further, in step S20, the sensor detects the security element along a direction parallel to the length direction of the substrate.

[0010] Further, in step S10, the magnetizing element magnetizes the security element along a magnetization direction parallel to the length direction of the substrate.

[0011] Further, in step S20, the sensor detects the security element along a direction perpendicular to the length direction of the substrate.

[0012] Further, in step S20, a single-slit coil type inductive magnetic head is used as the sensor.

[0013] Further, in step S30, if the shape of the magnetic signal is a half-wave shape, it is determined that the magnetic region is a magnetic region in which the easy magnetization axis is perpendicular to the surface of the substrate; if the shape of the magnetic signal is a waveform in which a positive half-wave and a negative half-wave are combined, it is determined that the magnetic region is a magnetic region in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle or an obtuse angle with the length direction of the substrate.

[0014] Further, in step S30, if the shape of the magnetic signal is a waveform in which a positive half-wave and a negative half-wave are combined, if the shape of the magnetic signal is a positive half-wave followed by a negative half-wave, it is determined that the magnetic region is a magnetic region in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate; if the shape of the magnetic signal is a negative half-wave followed by a positive half-wave, it is determined that the magnetic region is a magnetic region in which the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate; or if the shape of the magnetic signal is a positive half-wave followed by a negative half-wave, it is determined that the magnetic region is a magnetic region in which the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate; if the shape of the magnetic signal is a negative half-wave followed by a positive half-wave, it is determined that the magnetic region is a magnetic region in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate.

[0015] According to another aspect of the present application, there is provided a security detection structure, which applies the security element detection method described above.

[0016] The technical scheme of the present application is applied to the anti-fake element including a plurality of magnetic regions, at least one of which has an easy magnetization axis, the direction of the easy magnetization axis is perpendicular to the surface of the base material of the anti-fake element, or the direction of the easy magnetization axis is parallel to the surface of the base material and forms an acute angle or an obtuse angle with the length direction of the base material, and the detection method of the anti-fake element includes the following steps: S10, magnetizing the anti-fake element by using a magnetizing element with a magnetic field strength greater than the coercive force strength of the plurality of magnetic regions, so that the magnetization of the plurality of magnetic regions is arranged along the magnetization direction; S20, acquiring a sensor, the sensor detects the anti-fake element along a direction perpendicular to the magnetization direction of the magnetizing element, and obtains a magnetic signal of the anti-fake element; and S30, determining the direction of the easy magnetization axis of each magnetic region according to the magnetic signal.

[0017] The anti-fake element is magnetized by the magnetizing element, so that the magnetic characteristics of the anti-fake element are changed, the magnetization direction of the magnetizing element to the anti-fake element and the detection direction of the sensor are arranged to be perpendicular to each other, the magnetic signals detected by the easy magnetization axes in different directions are different, and the direction of the easy magnetization axis is distinguished according to the difference between the magnetic signals. The detection method in the present application only needs to use one magnetizing element, greatly reduces the difficulty of detection, and also reduces the detection cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the specification explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0019] Figure 1 A flow chart of the detection method of the anti-fake element of one optional embodiment of the present application is shown;

[0020] Figure 2 A schematic diagram of the detection relationship between the anti-fake detection structure and the anti-fake element of one optional embodiment of the present application is shown;

[0021] Figure 3 A schematic diagram of the structure of the sensor in Figure 2 is shown;

[0022] Figure 4 A magnetic signal of the anti-fake element detected by the sensor in Figure 2 is shown.

[0023] In the above drawings, the following reference signs are used:

[0024] 10, security element; 11, magnetic region; 111, magnetic region with easy axis perpendicular to the surface of the substrate; 112, magnetic region with easy axis parallel to the surface of the substrate and forming an acute angle with the length direction of the substrate; 113, magnetic region with easy axis parallel to the surface of the substrate and forming an obtuse angle with the length direction of the substrate; 20, magnetizing element; 30, sensor. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0027] In the present application, unless otherwise specified, the orientation words such as "upper", "lower", "top", "bottom" are generally directed to the directions shown in the drawings, or are directed to the vertical, perpendicular or gravity directions of the components themselves; similarly, for the convenience of understanding and description, "inner" and "outer" refer to the inner and outer relative to the contour of the components themselves, but the above orientation words are not used to limit the present application.

[0028] In order to solve the problem that the direction of the easy magnetization axis of the security element in the prior art is not easy to detect, the present application provides a detection method of a security element and a security detection structure.

[0029] As shown in Figures 1 to 4 The security element 10 includes a plurality of magnetic regions 11, at least one magnetic region 11 has an easy magnetization axis, the direction of the easy magnetization axis is perpendicular to the surface of the substrate of the security element 10, or the direction of the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle or an obtuse angle with the length direction of the substrate, and the detection method of the security element includes: step S10, using a magnetizing element 20 with a magnetic field strength greater than the coercive force strength of the plurality of magnetic regions 11 to magnetize the security element 10, so that the magnetization of the plurality of magnetic regions 11 is arranged along the magnetization direction; step S20, obtaining a sensor 30, the sensor 30 detects the security element 10 along a direction perpendicular to the magnetization direction of the magnetizing element 20, and obtains a magnetic signal of the security element 10; step S30, determining the direction of the easy magnetization axis of each magnetic region 11 according to the magnetic signal.

[0030] Magnetizing the anti-counterfeiting element 10 with the magnetizing element 20 alters its magnetic characteristics. By aligning the magnetization direction of the magnetizing element 20 perpendicular to the sensor's detection direction, different magnetic signals are detected along the easily magnetized axes in different directions, allowing for differentiation of the easily magnetized axis's orientation. Furthermore, the detection method in this application requires only one magnetizing element 20, significantly reducing the difficulty and cost of detection.

[0031] like Figure 2 As shown, in step S10, the magnetizing element 20 magnetizes the anti-counterfeiting element 10 along a magnetization direction parallel to the substrate. The magnetizing element 20 magnetizes the anti-counterfeiting element 10 along a direction parallel to the substrate, so that the magnetization of the multiple magnetic regions 11 is arranged along the magnetization direction.

[0032] like Figure 2 As shown, in step S10, the magnetizing element 20 magnetizes the anti-counterfeiting element 10 along a magnetization direction perpendicular to the length direction of the substrate. This arrangement allows for the magnetization of the anti-counterfeiting element 10, facilitating control of its magnetization direction. Since the anti-counterfeiting element 10 has an easy magnetization axis, the magnetizing element 20 exerts different magnetization effects on the magnetic regions 11 along different easy magnetization axes, enabling these regions to generate different magnetic signals, thus facilitating the differentiation of magnetic regions 11 with different easy magnetization axes.

[0033] like Figure 2 As shown, in step S20, the sensor 30 detects the anti-counterfeiting element 10 along the length direction parallel to the substrate. This arrangement enables the sensor 30 to detect different magnetic signals for magnetic regions 11 with different orientations of easily magnetized axes, thereby facilitating the differentiation of magnetic regions 11 with different orientations of easily magnetized axes.

[0034] Specifically, in step S20, a single-slit coil induction head is used as sensor 30. Sensor 30 absorbs magnetic field lines in a direction perpendicular to the length direction of the magnetic slit, generating a changing magnetic flux and forming a detection signal with a full-wave shape composed of positive and negative half-waves or negative and positive half-waves.

[0035] Specifically, in step S30, if the magnetic signal is a half-wave shape, then the magnetic region 11 is determined to be a magnetic region 11 whose easy magnetization axis is perpendicular to the surface of the substrate; if the magnetic signal is a waveform consisting of a positive half-wave and a negative half-wave, then the magnetic region 11 is determined to be a magnetic region 11 whose easy magnetization axis is parallel to the surface of the substrate and forms an acute or obtuse angle with the length direction of the substrate. The direction of the easy magnetization axis can be determined according to different magnetic signals.

[0036] Specifically, in step S30, if the shape of the magnetic signal is a waveform of a positive half wave combined with a negative half wave, if the shape of the magnetic signal is a positive half wave first and then a negative half wave, it is determined that the magnetic region 11 is a magnetic region 11 in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate; if the shape of the magnetic signal is a negative half wave first and then a positive half wave, it is determined that the magnetic region 11 is a magnetic region 11 in which the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate; or if the shape of the magnetic signal is a positive half wave first and then a negative half wave, it is determined that the magnetic region 11 is a magnetic region 11 in which the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate; if the shape of the magnetic signal is a negative half wave first and then a positive half wave, it is determined that the magnetic region 11 is a magnetic region 11 in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate. It is preset that which side of the easy magnetization axis parallel to the surface of the substrate and the length direction of the substrate is an acute angle and the opposite side is an obtuse angle, and in this case, it is determined whether it is an acute angle or an obtuse angle according to whether it is a positive half wave first and then a negative half wave or a negative half wave first and then a positive half wave.

[0037] In Figure 2 In the specific embodiment shown, the security element 10 comprises at least one magnetic region 111 in which the easy magnetization axis is perpendicular to the surface of the substrate, at least one magnetic region 112 in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate, and at least one magnetic region 113 in which the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate.

[0038] The security element 10 is conveyed in the direction D1;

[0039] The magnetization element 20 magnetizes the security element 10 in the direction D2;

[0040] The sensor 30 detects the signals of the magnetic regions 111 in which the easy magnetization axis is perpendicular to the surface of the substrate, the magnetic regions 112 in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate, and the magnetic regions 113 in which the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate in the security element 10;

[0041] The security element 10 is magnetized by the magnetization element 20, and the magnetization of the magnetic regions in the security element 10 is arranged in the magnetization direction D2;

[0042] The magnetic element is a rectangular neodymium iron boron permanent magnet, the magnetic field is generated by the rectangular neodymium iron boron permanent magnet, and the magnetization direction of the magnetic pole of the permanent magnet is perpendicular to the plane in which the substrate is located.

[0043] The conveying direction D1 of the security element 10 is perpendicular to the length direction of the magnetic gap in the sensor 30.

[0044] In Figure 2In the anti-counterfeiting element 10, the magnetic region 112, whose easily magnetized axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate, runs from left to right along the magnetic pole direction of the conveying direction D1; the magnetic region 113, whose easily magnetized axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate, runs from right to left along the magnetic pole direction of the conveying direction D1. The magnetic region 111, whose easily magnetized axis is perpendicular to the surface of the substrate, has its magnetic pole direction perpendicular to the plane of the substrate.

[0045] Sensor 30 absorbs magnetic field lines perpendicular to the substrate surface, generating a changing magnetic flux and forming a half-wave shaped detection signal.

[0046] like Figure 4 As shown, the magnetic signal of magnetic region 111, whose easy magnetization axis is perpendicular to the surface of the substrate, is half-wave shaped; the magnetic signal of magnetic region 112, whose easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate, is a negative half-wave followed by a positive half-wave; the magnetic signal of magnetic region 113, whose easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate, is a positive half-wave followed by a negative half-wave.

[0047] For magnetic regions without easily magnetized axes, due to magnetization by magnetizing element 20, there is no obvious distribution of magnetic poles along the transmission direction D1, and no distribution of magnetic poles along the direction perpendicular to the plane of the substrate. The signal detected by sensor 30 is almost zero. Therefore, the detection method determines the magnetic region 111 where the easily magnetized axis is perpendicular to the surface of the substrate, the magnetic region 112 where the easily magnetized axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate, and the magnetic region 113 where the easily magnetized axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate, based on the presence or absence and shape characteristics of the detected waveform.

[0048] Since this embodiment detects the magnetic region 111 where the easy magnetization axis is perpendicular to the surface of the substrate, the magnetic region 112 where the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate, and the magnetic region 113 where the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate, the detection method only uses one magnetic field magnetization and one sensor detection, making it easier to identify anti-counterfeiting components with magnetic regions having easy magnetization axes and reducing detection costs.

[0049] The anti-counterfeiting detection structure utilizes the aforementioned anti-counterfeiting elements and detection methods. The anti-counterfeiting detection structure employing these methods is less expensive to manufacture.

[0050] Example 2

[0051] The region differs from that in Example 1 in that the magnetization direction is different from the detection direction.

[0052] In the present embodiment, in step S10, the magnetizing element 20 magnetizes the security element 10 in a magnetization direction parallel to the length direction of the substrate. In step S20, the sensor 30 detects the security element 10 in a direction perpendicular to the length direction of the substrate. This arrangement also enables the direction of the easy magnetization axis of the security element to be detected.

[0053] Obviously, the above-described embodiments are only some, but not all of embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work should belong to the scope of protection of the present application.

[0054] It is to be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments consistent with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof.

[0055] It is to be noted that the terms "first", "second", and the like in the description and in the claims of this application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of the terms so termed is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of efficient operation in other than the order shown or described herein.

[0056] The preferred embodiments of the application have been described above with the aid of drawing figures, and are not limited to those embodiments per se but can be modified in various ways. It should be understood, therefore, that the application is not limited to the particular embodiments described herein, but is amenable to any alterations, modifications, and equivalents of the methods described therein.

Claims

1. A method of detecting a security element, characterized in that The anti-counterfeiting element (10) comprises a plurality of magnetic regions (11), at least one of the magnetic regions (11) has an easy magnetization axis, the direction of the easy magnetization axis is perpendicular to the surface of the substrate of the anti-counterfeiting element (10), or the direction of the easy magnetization axis is parallel to the surface of the substrate and forms an acute or obtuse angle with the length direction of the substrate, and the detection method of the anti-counterfeiting element comprises the following steps: Step S10: using a magnetizing element (20) with a magnetic field strength greater than the coercive force strength of the plurality of magnetic regions (11) to magnetize the anti-counterfeiting element (10), so that the magnetization of the plurality of magnetic regions (11) is arranged along the magnetization direction; Step S20: obtaining a sensor (30) for detecting the anti-counterfeiting element (10) along a direction perpendicular to the magnetization direction of the magnetizing element (20), and obtaining a magnetic signal of the anti-counterfeiting element (10); Step S30: determining the direction of the easy magnetization axis of each of the magnetic regions (11) according to the magnetic signal; The magnetization direction of the magnetizing element (20) to the anti-counterfeiting element (10) and the detection direction of the sensor (30) are perpendicular to each other in the surface parallel to the substrate.

2. A method of detecting a security element according to claim 1, characterized in that In the step S10, the magnetizing element (20) magnetizes the anti-counterfeiting element (10) along a direction parallel to the substrate.

3. A method of detecting a security element according to claim 1 or 2, characterized in that In the step S10, the magnetizing element (20) magnetizes the anti-counterfeiting element (10) along a direction perpendicular to the length direction of the substrate.

4. A method of detecting a security element according to claim 3, characterized in that In the step S20, the sensor (30) detects the anti-counterfeiting element (10) along a direction parallel to the length direction of the substrate.

5. A method of detecting a security element according to claim 1 or 2, characterized in that In the step S10, the magnetizing element (20) magnetizes the anti-counterfeiting element (10) along a direction parallel to the length direction of the substrate.

6. A method of detecting a security element according to claim 5, characterized in that In the step S20, the sensor (30) detects the anti-counterfeiting element (10) along a direction perpendicular to the length direction of the substrate.

7. A method of detecting a security element according to claim 1, characterized in that In the step S20, a single-slit coil type inductive magnetic head is used as the sensor (30).

8. A method of detecting a security element according to claim 1, characterized in that In the step S30, If the shape of the magnetic signal is a half-wave shape, it is determined that the magnetic region (11) is a magnetic region (111) with an easy magnetization axis perpendicular to the surface of the substrate; If the shape of the magnetic signal is a waveform of a combination of positive and negative half-waves, it is determined that the magnetic region (11) is a magnetic region (11) with an easy magnetization axis parallel to the surface of the substrate and forming an acute or obtuse angle with the length direction of the substrate.

9. A method of detecting a security element according to claim 8, characterized in that In the step S30, if the shape of the magnetic signal is a waveform of a combination of positive and negative half-waves, If the shape of the magnetic signal is a positive half-wave followed by a negative half-wave, it is determined that the magnetic region (11) is a magnetic region (112) with an easy magnetization axis parallel to the surface of the substrate and forming an acute angle with the length direction of the substrate; if the shape of the magnetic signal is a negative half-wave followed by a positive half-wave, it is determined that the magnetic region (11) is a magnetic region (113) with an easy magnetization axis parallel to the surface of the substrate and forming an obtuse angle with the length direction of the substrate; or If the shape of the magnetic signal is a positive half wave followed by a negative half wave, the magnetic region (11) is determined to be a magnetic region (113) in which the easy magnetization axis is parallel to the surface of the substrate and forms an obtuse angle with the length direction of the substrate; if the shape of the magnetic signal is a negative half wave followed by a positive half wave, the magnetic region (11) is determined to be a magnetic region (112) in which the easy magnetization axis is parallel to the surface of the substrate and forms an acute angle with the length direction of the substrate.

10. A security detection structure, characterized in that, The anti-counterfeiting detection structure applies the detection method of any one of claims 1 to 9.

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