CN112329902A - Magnetic anti-counterfeiting element and magnetic anti-counterfeiting product - Google Patents
Magnetic anti-counterfeiting element and magnetic anti-counterfeiting product Download PDFInfo
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- CN112329902A CN112329902A CN202011204214.2A CN202011204214A CN112329902A CN 112329902 A CN112329902 A CN 112329902A CN 202011204214 A CN202011204214 A CN 202011204214A CN 112329902 A CN112329902 A CN 112329902A
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- 108091026890 Coding region Proteins 0.000 claims abstract description 113
- 239000000758 substrate Substances 0.000 claims abstract description 24
- 239000006249 magnetic particle Substances 0.000 claims description 25
- 230000004907 flux Effects 0.000 claims description 17
- 238000001514 detection method Methods 0.000 description 16
- 230000008859 change Effects 0.000 description 15
- 230000005415 magnetization Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/06187—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with magnetically detectable marking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
- B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
- B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
- B42D25/30—Identification or security features, e.g. for preventing forgery
- B42D25/305—Associated digital information
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q30/00—Commerce
- G06Q30/018—Certifying business or products
- G06Q30/0185—Product, service or business identity fraud
Abstract
The embodiment of the invention provides a magnetic anti-counterfeiting element and a magnetic anti-counterfeiting product, belonging to the field of magnetic anti-counterfeiting. The magnetic security element comprises: a substrate; and at least a first magnetic coding sequence and a second magnetic coding sequence formed on the surface of the substrate, wherein the width of the non-magnetic region in the first magnetic coding sequence is less than the width of the magnetic region, such that the machine-readable signal of the first magnetic coding sequence is derived from the non-magnetic region of the first magnetic coding sequence, wherein the width of the non-magnetic region in the second magnetic coding sequence is greater than the width of the magnetic region, such that the machine-readable signal of the second magnetic coding sequence is derived from the magnetic region of the second magnetic coding sequence. The magnetic anti-counterfeiting element can realize phase modulation of the waveform of the machine-readable signal and has high anti-counterfeiting property.
Description
Technical Field
The invention relates to the field of magnetic anti-counterfeiting, in particular to a magnetic anti-counterfeiting element and a magnetic anti-counterfeiting product using the same.
Background
The magnetic material is an important carrier for machine-readable detection signals, and provides sorting and anti-counterfeiting functions for valuable documents such as bank notes, drafts and the like. The machine-readable detection signal typically contains information about the shape, amplitude, and phase of the detected waveform. The traditional magnetic machine-readable anti-counterfeiting technology designs a magnetic anti-counterfeiting element from the angle of detecting the amplitude and the shape of a waveform to upgrade the machine-readable anti-counterfeiting level.
For example, patent EP0310707a2 can detect a change in the amplitude of a waveform by modulating the magnitude of the residual magnetism of a magnetic material; patents EP0428779a1 and CN101076454A encode two magnetic materials with high and low coercive force, and then magnetize the magnetic code in different ways, so as to detect whether the waveform changes or not; the magnetic anti-counterfeiting element designed by the patent CN103729931A1 can enable the shape and amplitude of a detected waveform to change under different magnetization modes; the patent CN105321251A realizes the detection of the shape change of the waveform by controlling the shape of the magnetic anti-counterfeiting element. The magnetic anti-counterfeiting technology can improve the anti-counterfeiting level of machine-readable detection, but the starting point is the design from the angle of the shape and the amplitude of the detected waveform.
Disclosure of Invention
The embodiment of the invention aims to provide a magnetic anti-counterfeiting element and a magnetic anti-counterfeiting product, which can realize the modulation of the phase of a machine-readable signal.
In order to achieve the above object, an embodiment of the present invention provides a magnetic security element, including: a substrate; and at least a first magnetic coding sequence and a second magnetic coding sequence formed on the surface of the substrate, wherein the width of the non-magnetic region in the first magnetic coding sequence is less than the width of the magnetic region, such that the machine-readable signal of the first magnetic coding sequence is derived from the non-magnetic region of the first magnetic coding sequence, wherein the width of the non-magnetic region in the second magnetic coding sequence is greater than the width of the magnetic region, such that the machine-readable signal of the second magnetic coding sequence is derived from the magnetic region of the second magnetic coding sequence.
Optionally, when the magnetic anti-counterfeiting element is read by a machine, the magnetic flux variation law of the first magnetic encoding sequence is opposite to that of the second magnetic encoding sequence.
Optionally, the width of the non-magnetic region of the first magnetic code sequence is equal to the width of the magnetic region of the second magnetic code sequence.
Optionally, the magnetic region of the second magnetic encoding sequence covers the magnetic region of the first magnetic encoding sequence; or the magnetic region of the first magnetic coding sequence covers the magnetic region of the second magnetic coding sequence.
Optionally, the remanence of the magnetic region of the first magnetic encoding sequence is equal to or different from the remanence of the magnetic region of the second magnetic encoding sequence.
Optionally, the magnetic regions of the first magnetic encoding sequence and the magnetic regions of the second magnetic encoding sequence have the same or different coercivity strength.
Optionally, under the condition that the magnetic region of the second magnetic code sequence covers the magnetic region of the first magnetic code sequence, the coercivity strength of the magnetic region of the first magnetic code sequence is smaller than the coercivity strength of the magnetic region of the second magnetic code sequence, or under the condition that the magnetic region of the first magnetic code sequence covers the magnetic region of the second magnetic code sequence, the coercivity strength of the magnetic region of the second magnetic code sequence is smaller than the coercivity strength of the magnetic region of the first magnetic code sequence.
Optionally, at least a part of the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence are regularly arranged or randomly arranged along a predetermined direction.
Optionally, the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence have magnetic anisotropy or magnetic isotropy.
Optionally, at least a part of the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence are distributed along a direction perpendicular to the plane of the substrate, and the magnetic particles in the magnetic region of the second magnetic encoding sequence have uniaxial magnetic anisotropy.
Optionally, at least a part of the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence are distributed along a preset angle arrangement in a plane parallel to the plane of the substrate, and the magnetic particles in the magnetic region of the first magnetic encoding sequence have uniaxial magnetic anisotropy.
Correspondingly, the embodiment of the invention also provides a magnetic anti-counterfeiting product, which comprises the magnetic anti-counterfeiting element.
Optionally, the magnetic anti-counterfeiting product is one of the following: banknotes, bank notes, entrance tickets, documents, identity cards, money orders or credit cards.
By the above technical scheme, the machine-readable signal of the first magnetic coding sequence is derived from the non-magnetic region of the first magnetic coding sequence, and the machine-readable signal of the second magnetic coding sequence is derived from the magnetic region of the second magnetic coding sequence. When the magnetic anti-counterfeiting element is subjected to machine reading, the magnetic flux change rule of the first magnetic coding sequence is opposite to the magnetic flux change rule of the second magnetic coding sequence, so that the waveform phase of a machine-readable signal generated by detecting the first magnetic coding sequence is opposite to the waveform phase of a machine-readable signal generated by detecting the second magnetic coding sequence, the purpose of modulating the waveform phase of the machine-readable signal is achieved, and finally the magnetic anti-counterfeiting element has a machine-readable anti-counterfeiting characteristic with phase change and is higher in anti-counterfeiting level.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1a is a schematic representation of a first magnetic encoding sequence;
FIG. 1b is a schematic representation of a second magnetic encoding sequence;
FIG. 1c is a top view of a magnetic security element according to a first embodiment of the present invention, wherein the magnetic security element comprises a first magnetic code sequence as shown in FIG. 1a and a second magnetic code sequence as shown in FIG. 1 b;
FIG. 2 is a first embodiment of the present invention providing a magnetic security product comprising a magnetic security element and an apparatus for detecting the same;
fig. 3a is a detection waveform of the magnetic security element in the first embodiment detected by the magnetic sensor in fig. 2;
fig. 3b is a detection waveform of the magnetic security element in the second embodiment detected by the magnetic sensor in fig. 2;
fig. 3c is a detection waveform of the magnetic security element in the third embodiment detected by the magnetic sensor in fig. 2;
FIG. 4 is a magnetic security product including a magnetic security element and an apparatus for detecting the same according to another embodiment of the present invention;
fig. 5 is a detection waveform of the magnetic forgery prevention element detected by the magnetic sensor of fig. 4.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
An embodiment of the present invention provides a magnetic anti-counterfeiting element, where the magnetic anti-counterfeiting element may include: a substrate; and at least a first magnetic coding sequence and a second magnetic coding sequence formed on the surface of the substrate, wherein the width of the non-magnetic region in the first magnetic coding sequence is less than the width of the magnetic region, such that the machine-readable signal of the first magnetic coding sequence is derived from the non-magnetic region of the first magnetic coding sequence, wherein the width of the non-magnetic region in the second magnetic coding sequence is greater than the width of the magnetic region, such that the machine-readable signal of the second magnetic coding sequence is derived from the magnetic region of the second magnetic coding sequence.
In the first magnetic encoding sequence, the nonmagnetic regions and the magnetic regions are arranged at intervals, and preferably, the nonmagnetic regions are adjoined with the magnetic regions on both sides. The width of the non-magnetic region refers to the width of the gap between the two magnetic regions. In the first magnetic code sequence, in a case where the width of the nonmagnetic region is smaller than the width of the magnetic region, the width of the nonmagnetic region and the width of the magnetic region may be arbitrary. The width of the non-magnetic region preferably ranges from 0.6mm to 4mm, more preferably from 0.6mm to 1 mm. The width of the magnetic region preferably ranges not less than 5 mm.
In the second magnetic encoding sequence, the non-magnetic regions and the magnetic regions are spaced apart, preferably with non-magnetic regions adjacent to both sides of the magnetic regions. The width of a magnetic region refers to the width of the gap between two non-magnetic regions. In the second magnetic code sequence, in the case where the width of the nonmagnetic region is larger than that of the magnetic region, the width of the nonmagnetic region and the width of the magnetic region may be arbitrary. The width of the magnetic region preferably ranges from 0.6mm to 4mm, more preferably from 0.6mm to 1 mm. The width of the nonmagnetic regions preferably ranges not less than 5 mm.
The width of the nonmagnetic region of the first magnetic coding sequence and the width of the magnetic region of the second magnetic coding sequence can be equal or different, preferably, the width of the nonmagnetic region of the first magnetic coding sequence is equal to the width of the magnetic region of the second magnetic coding sequence, so that the width of the waveform of the machine-readable signal generated by detecting the first magnetic coding sequence is equal to the width of the waveform of the machine-readable signal generated by detecting the second magnetic coding sequence, and the anti-counterfeiting is facilitated.
The first magnetic encoding sequence and the second magnetic encoding sequence may be arranged in succession on the substrate in such a way that a machine readable signal is generated at the edge where the first magnetic encoding sequence and the second magnetic encoding sequence are joined. Preferably, the first magnetic code sequence and the second magnetic code sequence can also be arranged in an overlapping manner. For example, at least the magnetic region of the second magnetic encoding sequence may be positioned to overlie the magnetic region of the first magnetic encoding sequence, or the magnetic region of the first magnetic encoding sequence may be positioned to overlie at least the magnetic region of the second magnetic encoding sequence. The overlapping arrangement can eliminate machine-readable signals generated at the edge where the first magnetic coding sequence and the second magnetic coding sequence are connected in a continuous arrangement mode, so that only the non-magnetic area of the first magnetic coding sequence and the magnetic area of the second magnetic coding sequence can generate the machine-readable signals, and the anti-counterfeiting effect is further facilitated.
The remanence of the magnetic regions of the first magnetic encoding sequence may be equal to or different from the remanence of the magnetic regions of the second magnetic encoding sequence. In the case where the remanence of the magnetic region of the first magnetic encoding sequence is equal to the remanence of the magnetic region of the second magnetic encoding sequence, the amplitude of the waveform of the machine-readable signal produced by the first magnetic encoding sequence and the second magnetic encoding sequence is equal. Under the condition that the remanence of the magnetic region of the first magnetic coding sequence is not equal to that of the magnetic region of the second magnetic coding sequence, the amplitude values of the waveforms of the machine-readable signals generated by the first magnetic coding sequence and the second magnetic coding sequence are not equal, and the amplitude value is small when the remanence is small, so that more various anti-counterfeiting effects are generated.
The magnetic regions of the first magnetic encoding sequence and the magnetic regions of the second magnetic encoding sequence may have the same or different coercivity strength, i.e. the magnetic materials of the magnetic regions of both may be the same or different. Under the condition that the magnetic regions of the first magnetic encoding sequence and the second magnetic encoding sequence have the same coercive force strength, the same magnetic sensor can be used for detecting the magnetic anti-counterfeiting element to obtain machine-readable signals of the first magnetic encoding sequence and the second magnetic encoding sequence. Under the condition that the magnetic regions of the first magnetic coding sequence and the second magnetic coding sequence have different coercive force strengths, the corresponding different magnetic sensors are required to be used for detecting the magnetic anti-counterfeiting element so as to obtain machine-readable signals of the first magnetic coding sequence and the second magnetic coding sequence.
Under the condition that the magnetic region of the second magnetic coding sequence covers the magnetic region of the first magnetic coding sequence, the coercive force strength of the magnetic region of the first magnetic coding sequence can be set to be smaller than that of the magnetic region of the second magnetic coding sequence. Under the condition that the magnetic region of the first magnetic code sequence covers the magnetic region of the second magnetic code sequence, the coercive force strength of the magnetic region of the second magnetic code sequence can be set to be smaller than that of the magnetic region of the first magnetic code sequence. Providing the magnetic regions covered with a lower coercivity facilitates printing of the magnetic regions.
At least a part of the magnetic particles of the magnetic region of the first magnetic encoding sequence are arranged and distributed regularly or randomly along a preset direction, and preferably all or most of the magnetic particles of the magnetic region of the first magnetic encoding sequence are arranged and distributed regularly or randomly along the preset direction. At least a part of the magnetic particles of the magnetic region of the second magnetic coding sequence are arranged and distributed regularly or randomly along a preset direction, and preferably all or most of the magnetic particles of the magnetic region of the second magnetic coding sequence are arranged and distributed regularly or randomly along the preset direction. The magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence may have magnetic anisotropy or magnetic isotropy. The magnetic anti-counterfeiting element provided by the embodiment of the invention has the technical effects brought by different distribution of the magnetic particles due to the definition of the magnetic particles of the magnetic region.
Optionally, at least a part of the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence may be arranged and distributed along a direction perpendicular to the plane of the substrate, and the magnetic particles in the magnetic region of the second magnetic encoding sequence have uniaxial magnetic anisotropy. In the case where the substrate is placed horizontally, the plane of the substrate may be considered as a horizontal plane. It is preferred here that all or most of the magnetic particles in the magnetic region of the first magnetic coding sequence and/or in the magnetic region of the second magnetic coding sequence are arranged in a direction perpendicular to the plane of the substrate.
Or alternatively, at least a part of the magnetic particles in the magnetic region of the first magnetic coding sequence and/or the magnetic region of the second magnetic coding sequence can be arranged and distributed along a preset angle in a plane parallel to the plane of the substrate, and the magnetic particles in the magnetic region of the first magnetic coding sequence have uniaxial magnetic anisotropy. It is preferred here that all or most of the magnetic particles in the magnetic region of the first magnetic coding sequence and/or in the magnetic region of the second magnetic coding sequence are distributed along a predetermined angular alignment in a plane parallel to the plane of the substrate.
When the magnetic anti-counterfeiting element provided by the embodiment of the invention is read in a machine mode, the machine-readable signal of the first magnetic coding sequence is derived from the non-magnetic region of the first magnetic coding sequence, and the machine-readable signal of the second magnetic coding sequence is derived from the magnetic region of the second magnetic coding sequence. Specifically, the first magnetic coding sequence generates the change of magnetic flux at the edge of the non-magnetic area, the second magnetic coding sequence generates the change of magnetic flux at the edge of the magnetic area, and the change rule of the magnetic flux of the first magnetic coding sequence is opposite to the change rule of the magnetic flux of the second magnetic coding sequence, so that the waveform phase of the machine-readable signal generated by detecting the first magnetic coding sequence is opposite to the waveform phase of the machine-readable signal generated by detecting the second magnetic coding sequence, the purpose of modulating the waveform phase of the machine-readable signal is realized, and finally, the magnetic anti-counterfeiting element has the machine-readable anti-counterfeiting characteristic with the phase change, and the anti-counterfeiting level is higher.
Fig. 1a is a schematic diagram of a first magnetic encoding sequence, fig. 1b is a schematic diagram of a second magnetic encoding sequence, and fig. 1c is a top view of a magnetic security element according to an embodiment of the present invention, wherein the magnetic security element includes the first magnetic encoding sequence shown in fig. 1a and the second magnetic encoding sequence shown in fig. 1 b. As shown in fig. 1a to 1c, the magnetic security element includes a substrate and a first magnetic coding sequence and a second magnetic coding sequence disposed on the substrate. The first magnetic encoding sequence comprises a magnetic region 1, a magnetic region 4 and a non-magnetic region 2 positioned between the magnetic regions 1 and 4, wherein the widths of the magnetic region 1 and the magnetic region 4 are larger than the width of the non-magnetic region 2, which is equivalent to that the first magnetic encoding sequence is encoded by the non-magnetic region 2. The second magnetic encoding sequence comprises a non-magnetic region 5, a non-magnetic region 6, and a magnetic region 3 located between the non-magnetic region 5 and the non-magnetic region 6, corresponding to the second magnetic encoding sequence encoded with the magnetic region 3. The second magnetic coding sequence is covered on the first magnetic coding sequence, and the widths of the magnetic region 3 and the non-magnetic region 2 are basically the same. The number of magnetic and non-magnetic regions of the first and second magnetic encoding sequences in the figures is for illustration only and is not intended to limit the invention.
When the magnetic anti-counterfeiting element shown in fig. 1c is read in a machine mode, the change law of the magnetic flux of the first magnetic coding sequence is opposite to that of the magnetic flux of the second magnetic coding sequence. Specifically, the magnetic flux changes from the presence to the absence and then from the absence to the presence at the two edges of the non-magnetic area 2 of the first magnetic encoding sequence, which is equivalent to the magnetic flux change law that the magnetic flux first decreases and then increases. The magnetic flux changes from absent to present and then from present to absent at the two edges of the magnetic area 3 of the second magnetic encoding sequence, which is equivalent to the magnetic flux change rule that the magnetic flux is increased and then reduced. Therefore, the waveform phase of the machine-readable signal generated by detecting the first magnetic coding sequence is opposite to the waveform phase of the machine-readable signal generated by detecting the second magnetic coding sequence, the purpose of modulating the waveform phase of the machine-readable signal is achieved, and finally the magnetic anti-counterfeiting element has the machine-readable anti-counterfeiting characteristic with phase change, and the anti-counterfeiting level is higher.
In fig. 2 a magnetic security product 10, such as a banknote, is shown containing a magnetic security element 20. After magnetization by the magnetization device 30, the magnetic lines of force of the magnetic anti-counterfeit element 20 are distributed parallel to the detection direction (parallel to the plane of the substrate), and the machine-readable signal of the magnetic anti-counterfeit element 20 is detected by the magnetic sensor 40. The magnetizing means 30 may be, for example, a permanent magnet. Here, the magnetic regions of the first magnetic code sequence and the magnetic regions of the second magnetic code sequence in the magnetic security element 20 have the same coercivity strength.
Fig. 3a shows the waveform of the machine-readable signal detected by the magnetic sensor 40 of the magnetic security element 20, wherein the magnetic security element 20 has been pre-magnetized by the magnetizing device 30, and the direction of the arrow in the figure is the direction of the magnetized magnetic field (parallel to the detection direction of the magnetic sensor 40). In this embodiment, the remanence of the magnetic regions 1 and 4 in the first magnetic encoding sequence in the magnetic security element is substantially the same as the remanence of the magnetic regions 3 in the second magnetic encoding sequence. As can be seen from fig. 3a, the two machine-readable signals (sine signal or cosine signal) have substantially the same amplitude, substantially the same width, and opposite phases.
Fig. 3b shows the waveform of the machine-readable signal detected by the magnetic sensor 40 of the magnetic security element 20, wherein the magnetic security element 20 has been pre-magnetized by the magnetizing device 30, and the direction of the arrow in the figure is the direction of the magnetized magnetic field (parallel to the detection direction of the magnetic sensor 40). In this embodiment, the remanence of the magnetic regions 1 and 4 in the first magnetic encoding sequence in the magnetic security element is greater than the remanence of the magnetic regions 3 in the second magnetic encoding sequence. As can be seen from fig. 3b, the two machine-readable signals (sine signal or cosine signal) have substantially the same width and opposite phases. The amplitude of the machine-readable signal generated by the first magnetic code sequence is greater than the amplitude of the machine-readable signal generated by the second magnetic code sequence.
Fig. 3c shows the waveform of the machine-readable signal detected by the magnetic sensor 40 of the magnetic security element 20, wherein the magnetic security element 20 has been pre-magnetized by the magnetizing device 30, and the direction of the arrow in the figure is the direction of the magnetized magnetic field (parallel to the detection direction of the magnetic sensor 40). In this embodiment, the remanence of magnetic regions 1 and 4 in the first magnetic encoding sequence in the magnetic security element is less than the remanence of magnetic region 3 in the second magnetic encoding sequence. As can be seen from fig. 3b, the two machine-readable signals (sine signal or cosine signal) have substantially the same width and opposite phases. The amplitude of the machine-readable signal generated by the first magnetic code sequence is less than the amplitude of the machine-readable signal generated by the second magnetic code sequence.
In fig. 4, a magnetic security product 11, such as a banknote, comprising a magnetic security element 21 is shown, which is magnetized by a magnetizing device 31, the magnetic lines of force of the magnetizing device 31 are perpendicular to the plane of the detection direction (parallel to the plane of the substrate), and a machine-readable signal of the magnetic security element 21 is detected by a magnetic sensor 41. The magnetizing means 31 may be, for example, a permanent magnet. Here, the magnetic regions of the first magnetic code sequence and the magnetic regions of the second magnetic code sequence in the magnetic security element 21 have the same coercivity strength.
Fig. 5 shows the detection waveform of the magnetic security element 21 detected by the magnetic sensor 41, wherein the magnetic security element 21 has been pre-magnetized by the magnetization device 31, and the direction of the arrow in the figure is the direction of the magnetized magnetic field (parallel to the detection direction of the magnetic sensor 40). In this embodiment, the remanence of the magnetic regions in the first magnetic encoding sequence in the magnetic security element is substantially the same as the remanence of the magnetic regions in the second magnetic encoding sequence. As shown in fig. 5, in this embodiment, since the magnetic lines of force of the magnetization device 31 are perpendicular to the plane (parallel to the plane of the substrate) of the detection direction, the machine-readable signal generated by the magnetic anti-counterfeit element is a half-sine (or half-cosine) shaped signal, where the two signals have substantially the same amplitude, substantially the same width, and opposite phases.
In the above embodiment, the magnetic regions of the first and second magnetic encoding sequences have the same coercivity strength. Under the condition that the magnetic regions of the first magnetic coding sequence and the second magnetic coding sequence have different coercive force strengths, the corresponding different magnetic sensors are required to be used for detecting the magnetic anti-counterfeiting element so as to obtain machine-readable signals of the first magnetic coding sequence and the second magnetic coding sequence. The obtained machine-readable signal of the first magnetic coding sequence and the machine-readable signal of the second magnetic coding sequence still have the technical effect of opposite wave forms and phases of the machine-readable signals.
In another aspect, the embodiment of the present invention provides a magnetic anti-counterfeiting product including the above magnetic anti-counterfeiting element, and optionally, the magnetic anti-counterfeiting element may be disposed in the magnetic anti-counterfeiting product in a fully-buried or windowed manner. The magnetic anti-counterfeiting product comprises but is not limited to one of the following: banknotes, bank notes, entrance tickets, documents, identity cards, money orders or credit cards.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (13)
1. A magnetic security element, comprising:
a substrate; and
at least a first magnetic coding sequence and a second magnetic coding sequence formed on the surface of the substrate, wherein the width of the non-magnetic region of the first magnetic coding sequence is less than the width of the magnetic region such that the machine-readable signal of the first magnetic coding sequence is derived from the non-magnetic region of the first magnetic coding sequence, wherein the width of the non-magnetic region of the second magnetic coding sequence is greater than the width of the magnetic region such that the machine-readable signal of the second magnetic coding sequence is derived from the magnetic region of the second magnetic coding sequence.
2. The magnetic security element of claim 1, wherein the magnetic flux variation of the first magnetic code sequence is opposite to the magnetic flux variation of the second magnetic code sequence when the magnetic security element is read by a machine.
3. The magnetic security element of claim 1, wherein the width of the non-magnetic region of the first magnetic code sequence is equal to the width of the magnetic region of the second magnetic code sequence.
4. The magnetic security element according to claim 1,
the magnetic region of the second magnetic coding sequence covers the magnetic region of the first magnetic coding sequence; or
The magnetic region of the first magnetic coding sequence covers the magnetic region of the second magnetic coding sequence.
5. The magnetic security element according to any one of claims 1 to 4, characterized in that the remanence of the magnetic regions of the first magnetic coding sequence is equal or different from the remanence of the magnetic regions of the second magnetic coding sequence.
6. The magnetic security element according to any one of claims 1 to 4, wherein the magnetic regions of the first magnetic code sequence and the magnetic regions of the second magnetic code sequence have the same or different coercivity strength.
7. A magnetic security element according to claim 6,
under the condition that the magnetic region of the second magnetic coding sequence covers the magnetic region of the first magnetic coding sequence, the coercive force strength of the magnetic region of the first magnetic coding sequence is smaller than that of the magnetic region of the second magnetic coding sequence, or
And under the condition that the magnetic region of the first magnetic coding sequence covers the magnetic region of the second magnetic coding sequence, the coercive force strength of the magnetic region of the second magnetic coding sequence is smaller than that of the magnetic region of the first magnetic coding sequence.
8. The magnetic security element according to any one of claims 1 to 4, wherein at least a portion of the magnetic particles in the magnetic regions of the first magnetic coding sequence and/or the magnetic regions of the second magnetic coding sequence are distributed in a regular arrangement or a random arrangement along a predetermined direction.
9. The magnetic security element according to any one of claims 1 to 4, wherein the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence have a magnetic anisotropy or a magnetic isotropy.
10. The magnetic security element according to any one of claims 1 to 4, wherein at least a portion of the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence are aligned in a direction perpendicular to the plane of the substrate, and the magnetic particles in the magnetic region of the second magnetic encoding sequence have uniaxial magnetic anisotropy.
11. The magnetic security element according to any one of claims 1 to 4, wherein at least a portion of the magnetic particles in the magnetic region of the first magnetic encoding sequence and/or the magnetic region of the second magnetic encoding sequence are distributed along a predetermined angular alignment in a plane parallel to the plane of the substrate, and the magnetic particles in the magnetic region of the first magnetic encoding sequence have uniaxial magnetic anisotropy.
12. A magnetic security product comprising a magnetic security element according to any one of claims 1 to 11.
13. The magnetic security product of claim 12, wherein the magnetic security product is one of: banknotes, bank notes, entrance tickets, documents, identity cards, money orders or credit cards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011204214.2A CN112329902B (en) | 2020-11-02 | 2020-11-02 | Magnetic anti-counterfeiting element and magnetic anti-counterfeiting product |
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| US20050134122A1 (en) * | 2003-11-18 | 2005-06-23 | Canon Kabushiki Kaisha | Linear motor, exposure apparatus using the same, and device manufacturing method |
| US20100065639A1 (en) * | 2006-11-22 | 2010-03-18 | Schuetzmann Juergen | Security element for protecting documents of value |
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