CN112329902B - 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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- CN112329902B CN112329902B CN202011204214.2A CN202011204214A CN112329902B CN 112329902 B CN112329902 B CN 112329902B CN 202011204214 A CN202011204214 A CN 202011204214A CN 112329902 B CN112329902 B CN 112329902B
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- 108091026890 Coding region Proteins 0.000 claims abstract description 171
- 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
- 230000008859 change Effects 0.000 description 19
- 238000001514 detection method Methods 0.000 description 16
- 230000005415 magnetization Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
Classifications
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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
-
- 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 smaller than the width of the magnetic region, such that the machine-readable signal of the first magnetic coding sequence originates 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 originates from the magnetic region of the second magnetic coding sequence. The magnetic anti-counterfeiting element can realize the phase modulation of the waveform of a machine-readable signal and has high anti-counterfeiting performance.
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 magnetic anti-counterfeiting element.
Background
The magnetic material is an important carrier for machine-readable detection signals, and provides clearing and anti-counterfeiting functions for securities such as bank notes, draft notes 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 the magnetic anti-counterfeiting element from the angles of the amplitude and the shape of the detection waveform to realize the upgrading of the machine-readable anti-counterfeiting level.
For example, patent EP0310707A2 can realize detection of the change in waveform amplitude by modulating the magnitude of the remanence of the magnetic material; the patent EP0428779A1 and the patent CN101076454A adopt two magnetic materials with high coercivity and low coercivity to encode, and then magnetize the magnetic encodings in different modes, so that the detection of the change of the waveform can be realized; the magnetic anti-counterfeiting element designed by the patent CN103729931A1 can enable the detection waveform to change in shape and amplitude under different magnetization modes; patent CN105321251a is to realize the shape change of the detection waveform by controlling the shape of the magnetic security element. The magnetic anti-counterfeiting technology can read the detected anti-counterfeiting level by the elevator, but the starting point is the design from the angles of the shape and the amplitude of the detected waveform.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a magnetic security element and a magnetic security product, which can realize modulation of a machine-readable signal phase.
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 smaller than the width of the magnetic region, such that the machine-readable signal of the first magnetic coding sequence originates 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 originates from the magnetic region of the second magnetic coding sequence.
Optionally, when the magnetic security element is read by a machine, 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.
Optionally, the width of the non-magnetic region of the first magnetic coding sequence is equal to the width of the magnetic region of the second magnetic coding sequence.
Optionally, the magnetic region of the second magnetic coding sequence overlies the magnetic region of the first magnetic coding sequence; or the magnetic region of the first magnetic coding sequence overlies the magnetic region of the second magnetic coding sequence.
Optionally, the remanence of the magnetic region of the first magnetic coding sequence is equal or unequal to the remanence of the magnetic region of the second magnetic coding 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 strengths.
Optionally, the coercivity strength of the magnetic region of the first magnetic coding sequence is smaller than the coercivity strength of the magnetic region of the second magnetic coding sequence in case the magnetic region of the second magnetic coding sequence is overlaid on top of the magnetic region of the first magnetic coding sequence, or the coercivity strength of the magnetic region of the second magnetic coding sequence is smaller than the coercivity strength of the magnetic region of the first magnetic coding sequence in case the magnetic region of the first magnetic coding sequence is overlaid on top of the magnetic region of the second magnetic coding sequence.
Optionally, 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 are regularly arranged and distributed or randomly arranged and distributed along a preset direction.
Optionally, the magnetic particles in the magnetic regions of the first magnetic coding sequence and/or the magnetic regions of the second magnetic coding sequence have magnetic anisotropy or magnetic isotropy.
Optionally, at least a portion 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 are 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 coding sequence have uniaxial magnetic anisotropy.
Optionally, 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 are 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.
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: bank notes, entrance notes, certificates, documents, identification cards, draft notes or credit cards.
By the 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 realized, and finally the magnetic anti-counterfeiting element has the machine-readable anti-counterfeiting characteristic with phase change and has higher 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 are included to provide a further understanding of 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, without limitation, the embodiments of the invention. In the drawings:
FIG. 1a is a schematic diagram of a first magnetic coding sequence;
FIG. 1b is a schematic diagram of a second magnetic coding sequence;
FIG. 1c is a top view of a magnetic security element provided by a first embodiment of the invention, wherein the magnetic security element comprises a first magnetic coding sequence shown in FIG. 1a and a second magnetic coding sequence shown in FIG. 1 b;
FIG. 2 is a schematic illustration of a magnetic security product comprising a magnetic security element and an apparatus for detecting the same, provided in accordance with a first embodiment of the present invention;
FIG. 3a is a waveform of the magnetic security element of the first embodiment detected by the magnetic sensor of FIG. 2;
FIG. 3b is a waveform of the magnetic security element of the second embodiment detected by the magnetic sensor of FIG. 2;
FIG. 3c is a waveform of the magnetic security element of the third embodiment detected by the magnetic sensor of FIG. 2;
FIG. 4 is a schematic illustration of a magnetic security product comprising a magnetic security element and an apparatus for detecting the same, in accordance with another embodiment of the present invention;
fig. 5 is a waveform of detection of the magnetic security element by the magnetic sensor of fig. 4.
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
Embodiments of the present invention provide a magnetic security element that 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 smaller than the width of the magnetic region, such that the machine-readable signal of the first magnetic coding sequence originates 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 originates from the magnetic region of the second magnetic coding sequence.
In the first magnetic coding sequence, the nonmagnetic regions and the magnetic regions are arranged at intervals, and preferably the magnetic regions are adjacent to each other on both sides of the nonmagnetic regions. The width of the nonmagnetic region refers to the width of the gap between the two magnetic regions. In the first magnetic encoding sequence, the width of the nonmagnetic region and the width of the magnetic region may be arbitrary, provided that the width of the nonmagnetic region is smaller than the width of the magnetic region. The width of the nonmagnetic region is preferably in the range of 0.6mm to 4mm, more preferably 0.6mm to 1mm. The width of the magnetic region is preferably not less than 5mm.
In the second magnetic coding sequence, the nonmagnetic regions and the magnetic regions are spaced apart, preferably adjoining the nonmagnetic regions on either side of the magnetic regions. The width of the magnetic region refers to the width of the gap between the two non-magnetic regions. In the second magnetic encoding sequence, the width of the nonmagnetic region and the width of the magnetic region may be arbitrary, provided that the width of the nonmagnetic region is larger than the width of the magnetic region. The width of the magnetic region is preferably in the range of 0.6mm to 4mm, more preferably 0.6mm to 1mm. The width of the nonmagnetic regions is preferably not less than 5mm.
The width of the non-magnetic region of the first magnetic coding sequence may be equal to or different from the width of the magnetic region of the second magnetic coding sequence, preferably the width of the non-magnetic 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, which is more favorable for anti-counterfeiting.
The first magnetic coding sequence and the second magnetic coding sequence may be sequentially disposed on the substrate in such a manner that a machine-readable signal is generated at the edge where the first magnetic coding sequence and the second magnetic coding sequence are joined. Preferably, the first magnetic coding sequence and the second magnetic coding sequence may also be arranged in a superimposed manner. For example, at least the magnetic region of the second magnetic coding sequence may be arranged to overlie the magnetic region of the first magnetic coding sequence, or at least the magnetic region of the first magnetic coding sequence may be arranged to overlie the magnetic region of the second magnetic coding sequence. The superposition arrangement can eliminate the machine-readable signal generated at the connecting edge of the first magnetic coding sequence and the second magnetic coding sequence in the 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 signal, thereby being more beneficial to anti-counterfeiting.
The remanence of the magnetic region of the first magnetic coding sequence may be equal or unequal to the remanence of the magnetic region of the second magnetic coding sequence. In the case that 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 magnitudes of the waveforms of the machine-readable signals generated by the first magnetic encoding sequence and the second magnetic encoding sequence are equal. Under the condition that the remanence of the magnetic area of the first magnetic coding sequence is unequal to the remanence of the magnetic area of the second magnetic coding sequence, the amplitude of the waveform of the machine-readable signal generated by the first magnetic coding sequence and the amplitude of the waveform generated by the second magnetic coding sequence are unequal, and the amplitude 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 the two may be the same or different. Under the condition that the magnetic areas of the two magnetic areas have the same coercive force intensity, the same magnetic sensor can be used for detecting the magnetic anti-counterfeiting element to obtain the machine-readable signals of the first magnetic coding sequence and the second magnetic coding sequence. Under the condition that the magnetic areas of the two magnetic areas have different coercive force intensities, the corresponding different magnetic sensors are required to be used for detecting the magnetic anti-counterfeiting element to obtain the machine-readable signals of the first magnetic coding sequence and the second magnetic coding sequence.
In the case where the magnetic region of the second magnetic encoding sequence overlies the magnetic region of the first magnetic encoding sequence, the coercivity strength of the magnetic region of the first magnetic encoding sequence may be set to be less than the coercivity strength of the magnetic region of the second magnetic encoding sequence. In the case where the magnetic region of the first magnetic encoding sequence overlies the magnetic region of the second magnetic encoding sequence, the coercivity strength of the magnetic region of the second magnetic encoding sequence may be set to be less than the coercivity strength of the magnetic region of the first magnetic encoding sequence. The provision of a coated magnetic region with a lower coercivity facilitates printing of the magnetic region.
At least a part of the magnetic particles of the magnetic region of the first magnetic coding sequence are regularly arranged or randomly arranged along a predetermined direction, preferably all or most of the magnetic particles of the magnetic region of the first magnetic coding sequence are regularly arranged or randomly arranged along a predetermined direction. At least a part of the magnetic particles of the magnetic region of the second magnetic coding sequence are regularly arranged or randomly arranged along a predetermined direction, preferably all or most of the magnetic particles of the magnetic region of the second magnetic coding sequence are regularly arranged or randomly arranged along a predetermined direction. The magnetic particles in the magnetic regions of the first magnetic coding sequence and/or in the magnetic regions of the second magnetic coding sequence may have magnetic anisotropy or magnetic isotropy. The magnetic particles of the magnetic region are limited, so that the magnetic anti-counterfeiting element provided by the embodiment of the invention has the technical effect caused by different distribution of the magnetic particles.
Optionally, 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 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 coding sequence have uniaxial magnetic anisotropy. In the case of a substrate placed horizontally, the plane in which the substrate lies may be considered a horizontal plane. It is preferred here that all or most of the magnetic particles in the magnetic regions of the first magnetic coding sequence and/or in the magnetic regions 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 may 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 regions of the first magnetic coding sequence and/or in the magnetic regions of the second magnetic coding sequence are arranged at a predetermined angle in a plane parallel to the plane of the substrate.
When the magnetic anti-counterfeiting element provided by the embodiment of the invention is subjected to machine reading, a machine reading signal of the first magnetic coding sequence is derived from a non-magnetic area of the first magnetic coding sequence, and a machine reading signal of the second magnetic coding sequence is derived from a magnetic area of the second magnetic coding sequence. Specifically, the first magnetic coding sequence generates magnetic flux change at the edge of the non-magnetic area, the second magnetic coding sequence generates magnetic flux change at the edge of the magnetic area, and 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 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 has higher anti-counterfeiting level.
Fig. 1a is a schematic diagram of a first magnetic coding sequence, fig. 1b is a schematic diagram of a second magnetic coding sequence, and fig. 1c is a top view of a magnetic security element according to an embodiment of the present invention, where the magnetic security element includes the first magnetic coding sequence shown in fig. 1a and the second magnetic coding sequence shown in fig. 1 b. As shown in fig. 1a to 1c, the magnetic security element comprises a substrate, and a first magnetic coding sequence and a second magnetic coding sequence disposed on the substrate. The first magnetic coding sequence comprises a magnetic region 1, a magnetic region 4 and a non-magnetic region 2 arranged 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 the first magnetic coding sequence adopting the non-magnetic region 2 for coding. The second magnetic coding sequence comprises a non-magnetic region 5, a non-magnetic region 6, and a magnetic region 3 between the non-magnetic region 5 and the non-magnetic region 6, corresponding to the second magnetic coding sequence being coded with the magnetic region 3. The second magnetic coding sequence overlies the first magnetic coding sequence, and the magnetic region 3 and the non-magnetic region 2 are substantially the same width. The number of magnetic and non-magnetic regions of the first magnetic coding sequence, the second magnetic coding sequence, and the like are shown for illustration only and are not intended to limit the invention.
When the magnetic anti-counterfeiting element shown in the figure 1c is read by a machine, 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. Specifically, the magnetic flux at the two edges of the nonmagnetic region 2 of the first magnetic coding sequence changes from the presence to the absence and from the absence to the presence, which corresponds to the magnetic flux change law of decreasing first and then increasing. The magnetic flux at the two edges of the magnetic region 3 of the second magnetic encoding sequence changes from none to all and then from all to none, which corresponds to the magnetic flux change law that the magnetic flux is increased and then decreased. 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 has higher anti-counterfeiting level.
In fig. 2, a magnetic security product 10, such as a banknote, is shown comprising a magnetic security element 20. By magnetization of the magnetization device 30, the distribution of magnetic lines of force of the magnetic security element 20 is parallel to the detection direction (parallel to the plane of the substrate), and the machine-readable signal of the magnetic security element 20 is detected by using the magnetic sensor 40. The magnetizing means 30 may be, for example, a permanent magnet. Here, the magnetic regions of the first magnetic encoding sequence and the magnetic regions of the second magnetic encoding sequence in magnetic security element 20 have the same coercivity strength.
Fig. 3a shows the waveform of the machine-readable signal detected by magnetic security element 20 via magnetic sensor 40, wherein magnetic security element 20 has been pre-magnetized by magnetization device 30, the direction of the arrow in the figure being the direction of the magnetic field of magnetization (parallel to the detection direction of magnetic sensor 40). In this embodiment, the remanence of magnetic regions 1 and 4 in the first magnetic encoding sequence and the remanence of magnetic regions 3 in the second magnetic encoding sequence in the magnetic security element are substantially the same. As can be seen from fig. 3a, the two machine-readable signals (sine signals or cosine signals) have substantially the same amplitude, substantially the same width, and opposite phases.
Fig. 3b shows the waveform of the machine-readable signal detected by magnetic security element 20 via magnetic sensor 40, wherein magnetic security element 20 has been pre-magnetized by magnetization device 30, the direction of the arrow in the figure being the direction of the magnetic field of magnetization (parallel to the detection direction of magnetic sensor 40). In this embodiment, the remanence of magnetic regions 1 and 4 in the first magnetic encoding sequence is greater than the remanence of magnetic regions 3 in the second magnetic encoding sequence in the magnetic security element. As can be seen from fig. 3b, the two machine-readable signals (sine signals or cosine signals) have substantially the same width and opposite phases. The amplitude of the machine-readable signal generated by the first magnetic encoding sequence is greater than the amplitude of the machine-readable signal generated by the second magnetic encoding sequence.
Fig. 3c shows the waveform of the machine-readable signal detected by magnetic security element 20 via magnetic sensor 40, wherein magnetic security element 20 has been pre-magnetized by magnetization device 30, the direction of the arrow in the figure being the direction of the magnetic field of magnetization (parallel to the detection direction of magnetic sensor 40). In this embodiment, the remanence of magnetic regions 1 and 4 in the first magnetic encoding sequence is smaller than the remanence of magnetic region 3 in the second magnetic encoding sequence in the magnetic security element. As can be seen from fig. 3b, the two machine-readable signals (sine signals or cosine signals) have substantially the same width and opposite phases. The amplitude of the machine-readable signal generated by the first magnetic encoding sequence is less than the amplitude of the machine-readable signal generated by the second magnetic encoding sequence.
In fig. 4, a magnetic security product 11, such as a banknote, comprising a magnetic security element 21 is shown, magnetized by a magnetizing device 31, the magnetic field lines of the magnetizing device 31 being perpendicular to the plane of the detection direction (parallel to the plane of the substrate), and the machine-readable signal of the magnetic security element 21 is detected using a magnetic sensor 41. The magnetizing means 31 may be, for example, a permanent magnet. Here, the magnetic regions of the first magnetic coding sequence and the magnetic regions of the second magnetic coding sequence in the magnetic security element 21 have the same coercivity strength.
Fig. 5 shows a detection waveform of magnetic security element 21 detected by magnetic sensor 41, wherein magnetic security element 21 has been pre-magnetized by magnetizing device 31, the direction of the arrow in the figure being the direction of the magnetic field of magnetization (parallel to the detection direction of 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. In this embodiment, as shown in fig. 5, since the magnetic lines of force of the magnetization device 31 are perpendicular to the plane (parallel to the plane of the substrate) in which the detection direction is located, the machine-readable signal generated by the magnetic security element is a half sine (or half cosine) shaped signal, wherein 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 magnetic encoding sequence and the second magnetic encoding sequence have the same coercivity strength. Under the condition that the magnetic areas of the first magnetic coding sequence and the second magnetic coding sequence have different coercive force intensities, the corresponding different magnetic sensors are required to be used for detecting the magnetic anti-counterfeiting element to obtain the machine-readable signals of the first magnetic coding sequence and the second magnetic coding sequence. The machine-readable signal of the first magnetic coding sequence and the machine-readable signal of the second magnetic coding sequence obtained respectively still have the technical effect that the waveform phases of the machine-readable signals are opposite.
In another aspect, the embodiment of the invention provides a magnetic anti-counterfeiting product including the magnetic anti-counterfeiting element, and optionally, the magnetic anti-counterfeiting element can be fully embedded or windowed in the magnetic anti-counterfeiting product. The magnetic security product includes, but is not limited to, one of the following: bank notes, entrance notes, certificates, documents, identification cards, draft notes or credit cards.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but 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 scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (12)
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 substrate surface, the width of the non-magnetic region in the first magnetic coding sequence being smaller than the width of the magnetic region such that the machine-readable signal of the first magnetic coding sequence originates 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 originates from the magnetic region of the second magnetic coding sequence;
wherein the magnetic region of the second magnetic coding sequence overlies the magnetic region of the first magnetic coding sequence; or the magnetic region of the first magnetic coding sequence overlies the magnetic region of the second magnetic coding sequence.
2. The magnetic security element of claim 1 wherein the magnetic flux of the first magnetic encoding sequence varies inversely with the magnetic flux of the second magnetic encoding sequence when the magnetic security element is machine-readable.
3. The magnetic security element of claim 1 wherein the width of the non-magnetic region of the first magnetic coding sequence is equal to the width of the magnetic region of the second magnetic coding sequence.
4. A magnetic security element according to any one of claims 1 to 3 wherein the remanence of the magnetic region of the first magnetic encoding sequence is equal or unequal to the remanence of the magnetic region of the second magnetic encoding sequence.
5. A magnetic security element according to any one of claims 1 to 3 wherein 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 strengths.
6. The magnetic security element of claim 5 wherein,
in the case where the magnetic region of the second magnetic encoding sequence overlies the magnetic region of the first magnetic encoding sequence, the coercivity strength of the magnetic region of the first magnetic encoding sequence is less than the coercivity strength of the magnetic region of the second magnetic encoding sequence, or
In the case where the magnetic region of the first magnetic encoding sequence overlies the magnetic region of the second magnetic encoding sequence, the coercivity strength of the magnetic region of the second magnetic encoding sequence is less than the coercivity strength of the magnetic region of the first magnetic encoding sequence.
7. A magnetic security element according to any one of claims 1 to 3, wherein at least a portion of the magnetic particles in the magnetic regions of the first magnetic encoding sequence and/or the magnetic regions of the second magnetic encoding sequence are regularly or randomly aligned along a predetermined direction.
8. A magnetic security element according to any one of claims 1 to 3, wherein the magnetic particles in the magnetic regions of the first magnetic coding sequence and/or the magnetic regions of the second magnetic coding sequence have magnetic anisotropy or magnetic isotropy.
9. A magnetic security element according to any one of claims 1 to 3, 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 aligned in a direction perpendicular to the plane of the substrate, and the magnetic particles in the magnetic regions of the second magnetic coding sequence have uniaxial magnetic anisotropy.
10. A magnetic security element according to any one of claims 1 to 3, 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 arranged at a predetermined angle in a plane parallel to the plane of the substrate, and the magnetic particles in the magnetic regions of the first magnetic coding sequence have uniaxial magnetic anisotropy.
11. A magnetic security product comprising a magnetic security element according to any one of claims 1 to 10.
12. The magnetic security product of claim 11, wherein the magnetic security product is one of: bank notes, entrance notes, certificates, documents, identification cards, draft notes 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 |
Applications Claiming Priority (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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112329902A CN112329902A (en) | 2021-02-05 |
| CN112329902B true CN112329902B (en) | 2024-02-13 |
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| CN102971748A (en) * | 2010-07-01 | 2013-03-13 | 费德欧尼公司 | Magnetic coding system with deposit of magnetic areas produced by at least two magnetic ink types with different coercitive fields, deposited in an at least partial overlay |
| CN107089066A (en) * | 2016-02-17 | 2017-08-25 | 捷德货币技术有限责任公司 | The security element encoded with magnetic |
| CN108239893A (en) * | 2018-01-23 | 2018-07-03 | 张若晨 | Security element and its manufacturing method and security document |
| CN111016494A (en) * | 2019-11-20 | 2020-04-17 | 中钞特种防伪科技有限公司 | Anti-counterfeiting element and anti-counterfeiting product |
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| JP2005151753A (en) * | 2003-11-18 | 2005-06-09 | Canon Inc | Linear motor |
| DE102006055170A1 (en) * | 2006-11-22 | 2008-05-29 | Giesecke & Devrient Gmbh | Security element for securing value documents |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102971748A (en) * | 2010-07-01 | 2013-03-13 | 费德欧尼公司 | Magnetic coding system with deposit of magnetic areas produced by at least two magnetic ink types with different coercitive fields, deposited in an at least partial overlay |
| CN107089066A (en) * | 2016-02-17 | 2017-08-25 | 捷德货币技术有限责任公司 | The security element encoded with magnetic |
| CN108239893A (en) * | 2018-01-23 | 2018-07-03 | 张若晨 | Security element and its manufacturing method and security document |
| CN111016494A (en) * | 2019-11-20 | 2020-04-17 | 中钞特种防伪科技有限公司 | Anti-counterfeiting element and anti-counterfeiting product |
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Address after: 100070 No. 6 Spark Road, Science City, Beijing, Fengtai District Applicant after: ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co.,Ltd. Applicant after: China Banknote Printing and Minting Group Co.,Ltd. Address before: 100070 No. 6 Spark Road, Science City, Beijing, Fengtai District Applicant before: ZHONGCHAO SPECIAL SECURITY TECHNOLOGY Co.,Ltd. Applicant before: CHINA BANKNOTE PRINTING AND MINTING Corp. |
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