CN113516216A - Anti-counterfeiting element, anti-counterfeiting element detection method and anti-counterfeiting product - Google Patents
Anti-counterfeiting element, anti-counterfeiting element detection method and anti-counterfeiting product Download PDFInfo
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- CN113516216A CN113516216A CN202110454360.9A CN202110454360A CN113516216A CN 113516216 A CN113516216 A CN 113516216A CN 202110454360 A CN202110454360 A CN 202110454360A CN 113516216 A CN113516216 A CN 113516216A
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- 238000001514 detection method Methods 0.000 title abstract description 18
- 239000000696 magnetic material Substances 0.000 claims abstract description 32
- 239000000758 substrate Substances 0.000 claims abstract description 20
- 238000009826 distribution Methods 0.000 claims description 30
- 238000000034 method Methods 0.000 claims description 11
- 238000010998 test method Methods 0.000 claims 2
- 238000005516 engineering process Methods 0.000 description 8
- 230000005415 magnetization Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001788 irregular Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000003287 optical effect Effects 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000010062 adhesion mechanism Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
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- 230000002441 reversible 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
- G06K19/06196—Constructional details
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
- G06K17/0022—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations arrangements or provisious for transferring data to distant stations, e.g. from a sensing device
Abstract
The embodiment of the invention provides an anti-counterfeiting element, an anti-counterfeiting element detection method and an anti-counterfeiting product, and belongs to the field of anti-counterfeiting. The security element comprises: the magnetic material comprises a substrate and multiple types of magnetic regions formed on the surface of the substrate, wherein the multiple types of magnetic regions at least comprise a first type of magnetic region composed of one or more first magnetic regions and a second type of magnetic region composed of one or more second magnetic regions, the first magnetic region is composed of a magnetic material with a first coercive force, the second magnetic region is composed of a magnetic material with a second coercive force, the first coercive force is different from the second coercive force, and the period of the first type of magnetic region is non-integral multiple of the period of the second type of magnetic region. The anti-counterfeiting element can meet the requirements of engineering generation, and can hide key information, so that the anti-counterfeiting element is not easy to identify and crack.
Description
Technical Field
The invention relates to the field of anti-counterfeiting, in particular to an anti-counterfeiting element, an anti-counterfeiting element detection method and an anti-counterfeiting product.
Background
Magnetic anti-counterfeiting technology has been applied to the field of valuable documents such as bank notes and the like since the last 60 years. With the development of science and technology, more materials and processes are applied to the field. The magnetic coding technology is gradually developed from the original single material to a plurality of materials. The production and processing technology is greatly improved, and the product characteristics of various materials and precise technology at present are gradually formed. Meanwhile, various technologies are researched in the aspects of identification and reading of the anti-counterfeiting element. In other words, the materials, the process and the counterfeit identification technology are developed synchronously, and the counterfeit prevention capability of the counterfeit prevention element is improved.
Patent application EP0428779a1 describes a security element using two coercivity magnetic materials. In the length direction of the anti-counterfeiting element, different coercive force magnetic materials are arranged at intervals (a blank area is arranged between two magnetic areas), a connecting line overprinting processing technology is adopted to produce the anti-counterfeiting element with a certain magnetic coding rule, and the anti-counterfeiting element can be identified and read by a special detection method and a special detection device. The anti-counterfeiting element is easy to be counterfeited maliciously for the current circulation environment.
Patent application WO2009090676a1 describes a security element which also uses two coercivity magnetic materials which are not only spaced apart in the length direction of the security element but also in a regular layered structure in the height direction of the security element.
The inventor of the present application finds that the above solution of the prior art has the following defects in the process of implementing the present invention: in patent application EP0428779a1, two ways of regular arrangement of coercivity are easy to be cracked and forged by forged molecules, for example, the forged molecules can analyze the distribution area and specification of magnetic codes by using an optical measuring instrument and a magnetic sensor, and calculate the code rule, thereby realizing cracking; although the anti-counterfeiting element described in patent application WO2009090676a1 is difficult to analyze the encoding rule by the aforementioned method, the regular superposition processing technique is difficult to implement in mass production, and the yield is difficult to guarantee, thereby greatly increasing the production cost.
The above patent describes a distribution of magnetic domains where individual sheets exhibit at least one complete cycle of information. And therefore relatively easy for information to decipher.
Disclosure of Invention
An object of the embodiments of the present invention is to provide an anti-counterfeit element, an anti-counterfeit element detection method, and an anti-counterfeit product, which are used to solve at least the above technical problems.
In order to achieve the above object, an embodiment of the present invention provides a security element, including: the magnetic material comprises a substrate and multiple types of magnetic regions formed on the surface of the substrate, wherein the multiple types of magnetic regions at least comprise a first type of magnetic region composed of one or more first magnetic regions and a second type of magnetic region composed of one or more second magnetic regions, the first magnetic region is composed of a magnetic material with a first coercive force, the second magnetic region is composed of a magnetic material with a second coercive force, the first coercive force is different from the second coercive force, and the period of the first type of magnetic region is non-integral multiple of the period of the second type of magnetic region.
Correspondingly, the embodiment of the invention also provides a detection method of the anti-counterfeiting element, which comprises the following steps: magnetizing the security element in a first direction of the security element using a first magnetizing device, wherein a first magnetic field of the first magnetizing device has a magnetic field strength greater than the first and second coercivity; reading a first magnetically encoded signal of the security element; magnetizing the anti-counterfeiting element along the first direction of the anti-counterfeiting element by using a second magnetizing device, wherein the second magnetic field strength of the second magnetizing device is consistent with the first coercive force or the second coercive force, or the magnetic field strength of the second magnetic field of the second magnetizing device is between the first coercive force or the second coercive force, and the first magnetic field direction is opposite to the second magnetic field direction; reading a second magnetically encoded signal of the security element; and determining a distribution of magnetic regions of the security element based on the first magnetically encoded signal and the second magnetically encoded signal.
Correspondingly, the embodiment of the invention also provides a detection method of the anti-counterfeiting element, which comprises the following steps: magnetizing the security element in a first direction of the security element using a first magnetizing device, wherein a magnetic field strength of a first magnetic field of the first magnetizing device is greater than the first, second, and third coercivity; reading a first magnetically encoded signal of the security element; magnetizing the security element in the first direction of the security element using a second magnetizing device, wherein a second magnetic field of the second magnetizing device has a magnetic field strength that is consistent with an ordered middle of the first, second, and third coercivity, and the first magnetic field direction is opposite to the second magnetic field direction; reading a second magnetically encoded signal of the security element; and determining a distribution of magnetic regions of the security element based on the first magnetically encoded signal and the second magnetically encoded signal.
Correspondingly, the embodiment of the invention also provides an anti-counterfeiting product using the anti-counterfeiting element.
Through the technical scheme, the anti-counterfeiting element comprises a plurality of magnetic regions, each magnetic region is composed of magnetic materials with different coercive forces, the distribution rules of the different magnetic regions are uncertain, and when the anti-counterfeiting element is detected along the length direction of an anti-counterfeiting product, irregular codes can appear, so that the effective codes can be hidden, and the anti-counterfeiting element is not easy to identify and crack. In addition, the anti-counterfeiting element provided by the embodiment of the invention can meet the requirement of engineering generation and has low requirement on an accurate generation process.
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. 1(a) shows a schematic cross-sectional view of a security element according to an embodiment of the invention;
FIGS. 1(b) and 1(c) show diagrams of the detected magnetically encoded signals of the security element of FIG. 1 (a);
FIG. 2(a) shows a schematic cross-sectional view of a security element according to another embodiment of the invention;
FIGS. 2(b) to 2(e) show diagrams of the detected magnetically encoded signals of the security element of FIG. 2 (a);
FIG. 3(a) shows a schematic cross-sectional view of a security element according to a further embodiment of the invention;
FIGS. 3(b) and 3(c) are schematic diagrams illustrating the detected magnetically encoded signals of the security element of FIG. 3 (a); and
fig. 4 shows a schematic view of the detection of a security element according to an embodiment of the invention.
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 security element, which may include: a substrate having a first surface and a second surface opposite to each other; and a plurality of types of magnetic regions formed in a first direction of the first surface, the first direction may be a longitudinal direction of the substrate. Each type of magnetic region is composed of magnetic materials with different coercive forces, and the period of at least one type of magnetic region in the plurality of types of magnetic regions is non-integral multiple of the period of the other type of magnetic region. Therefore, the distribution rules of different magnetic regions are uncertain, when the anti-counterfeiting product is detected along the length direction, irregular codes can appear, so that the effective codes can be hidden, and the anti-counterfeiting element is not easy to recognize and crack. In addition, the anti-counterfeiting element provided by the embodiment of the invention can be coated in one step by a gravure printing mode.
For example, the plurality of types of magnetic regions may include at least a first type of magnetic region composed of one or more first magnetic regions composed of a magnetic material having a first coercivity and a second type of magnetic region composed of one or more second magnetic regions composed of a magnetic material having a second coercivity, wherein the first coercivity is different from the second coercivity, and a period of the first type of magnetic region is a non-integer multiple of a period of the second type of magnetic region.
Among the multiple types of magnetic regions of the anti-counterfeiting element, the coercive force of the magnetic material of at least one type of magnetic region is higher than 1000Oe, and the coercive force of the magnetic material of at least one type of magnetic region is lower than 500 Oe. For example, the first coercivity is higher than 1000Oe, and the second coercivity is lower than 500 Oe; or the second coercive force is higher than 1000Oe, and the first coercive force is lower than 500 Oe.
The period of the second type of magnetic region may be much longer than that of the first type of magnetic region, for example, the period of the second type of magnetic region may be 10 times longer than that of the first type of magnetic region, which may make the length of the whole period of the plurality of types of magnetic regions larger or much longer than that of the anti-counterfeiting region of the anti-counterfeiting product attached to the anti-counterfeiting element, so that, for example, when printing banknotes or securities, the arrangement rules of the magnetic regions of the anti-counterfeiting element formed on at least adjacent banknotes or securities are different, and further, the magnetic encoding signals generated by the anti-counterfeiting element on the adjacent banknotes or securities are also different. It is to be understood that the length of the entire period of the plurality of types of magnetic regions may be the least common multiple of the period of each type of magnetic region. The security product to which the security element is attached may be, for example, a banknote, a security document, a security card, etc.
In an optional embodiment, the length of the full cycle of the multiple types of magnetic regions of the security element may be greater than or much greater than the length of the security region of the security product attached to the security element, and preferably, the length of the full cycle of the multiple types of magnetic regions is greater than 10 times the length of the security region of the security product attached to the security element, so that the length of the full cycle of the multiple types of magnetic regions is greater than or much greater than the length of the security region of the security product attached to the security element, which makes the arrangement rule of the magnetic regions of the security element on at least adjacent banknotes or valuable papers different when, for example, banknotes or valuable papers are printed, and further, the magnetic encoding signals generated by the security element on the adjacent banknotes or valuable papers are also different. It is to be understood that the length of the entire period of the plurality of types of magnetic regions may be the least common multiple of the period of each type of magnetic region. The security product to which the security element is attached may be, for example, a banknote, a security document, a security card, etc.
In an alternative embodiment, the dimensions of the magnetic regions making up each type of magnetic region in the first direction may be the same or different, i.e. the dimensions of the magnetic regions in the length direction of the substrate may be the same or different.
In an alternative embodiment, the magnetic regions constituting each type of magnetic region have the same or different sizes in a second direction perpendicular to and in the same plane as the first direction, that is, the sizes of the magnetic regions in the width direction of the substrate may be the same or different.
In an alternative embodiment, the thicknesses of the magnetic regions constituting each type of magnetic region may be respectively the same or different.
Fig. 1(a) shows a schematic cross-sectional view of a security element according to an embodiment of the invention. As shown in fig. 1(a), a security element provided in an embodiment of the present invention may include: a substrate having a first surface and a second surface opposite to each other; and a first magnetic region and a second magnetic region formed on the substrate, the first magnetic region being composed of a first magnetic region 11, and the second magnetic region being composed of a second magnetic region 12. The first magnetic region 11 consists of a magnetic material having a first coercivity higher than 1000Oe and the second magnetic region 12 consists of a magnetic material having a second coercivity lower than 500 Oe. First magnetic region 11 and second magnetic region 12 are regularly distributed in a fixed period, respectively. The period of the first disposable region and the period of the second magnetic region may have a significant difference, and the period of the first magnetic region and the period of the second magnetic region are non-integer multiples. The period of the second magnetic region may be much greater than the period of the first magnetic region, and preferably, the period of the second magnetic region may be greater than 10 times the period of the first magnetic region. It will be appreciated that the period of the first magnetic region may also be arranged to be greater than the period of the second magnetic region, for example greater than 10 times the period of the second magnetic region. Therefore, in the continuous coating process, the arrangement rule of the first magnetic region and the second magnetic region with respect to each other is not deterministic, for example, the first magnetic region and the second magnetic region may have a randomly overlapping region. In addition, the period setting can also lead the reproduction of the distribution rule of the first magnetic area and the second magnetic area of the security anti-counterfeiting element to be generated beyond a considerable distance.
After the first magnetic region and the second magnetic region are integrally arranged, the whole period is larger than that of any one magnetic region in the multi-type magnetic region. After the anti-counterfeiting ticket is applied to the ticket surface, the non-periodic arrangement of the magnetic areas of the single anti-counterfeiting product can be presented, namely the magnetic information of the ticket surface is personalized.
The embodiment of the invention also provides a detection method of the anti-counterfeiting element. In performing detection on the security element of fig. 1(a), the security element may first be magnetized in a first direction of the security element using a first magnetizing means, wherein a value of a first magnetic field strength (in Gs) of the first magnetizing means is greater than values of the first coercivity (in Oe) and the second coercivity (in Oe), and the first direction is parallel to a length direction of the security element. After the magnetization is completed, a first magnetic encoding signal of the anti-counterfeiting element can be read by using a sensor, as shown in fig. 1(b), the first magnetic encoding signal is a superposition of encoding signals generated by the first magnetic region and the second magnetic region, the signals are irregularly distributed, and the distribution of the magnetic regions of the anti-counterfeiting element cannot be determined according to the first magnetic encoding signal.
After detecting the first magnetically encoded signal, the security element may be magnetized in a first direction of the security element using a second magnetizing means, wherein a value of a magnetic field strength (in Gs) of a second magnetic field of the second magnetizing means coincides with the value of the first coercivity (in Oe) or the second coercivity (in Oe), i.e. the magnetic field strength of the second magnetic field is equal or substantially equal to the first coercivity or the second coercivity. The second magnetic field direction is opposite to the first magnetic field direction, namely the first magnetic field direction and the second magnetic field direction form an angle of 180 degrees. After this magnetization is complete, the sensor can be used to read the second magnetically encoded signal of the security element. In the case shown in fig. 1(c), the magnetic field strength of the second magnetic field is substantially equal to the second coercive force, and the signal of the second magnetic field region corresponding to the second coercive force is weakened so as to disappear. Since the second magnetic field strength is less than the first coercivity, the magnetic encoding signal of the first magnetic field region corresponding to the first coercivity is still present, and the encoded information of the first magnetic region is presented in fig. 1 (c).
The magnetic area distribution of the security element can be determined on the basis of the first magnetically encoded signal shown in fig. 1(b) and the second magnetically encoded signal shown in fig. 1 (c). For example, the distribution information of the first magnetic region can be determined according to the second magnetic encoding signal shown in fig. 1(c), and the magnetic encoding signal of the second magnetic region can be obtained by subtracting the second magnetic encoding signal from the first magnetic encoding signal, so that the distribution information of the second magnetic region can be determined. The magnetic area distribution of the security element can be obtained based on the distribution information of the first magnetic area and the distribution information of the second magnetic area.
In some embodiments, the security element provided by embodiments of the present invention may include: a substrate having a first surface and a second surface opposite to each other; and a first type of magnetic region and a second type of magnetic region formed in the substrate. The first type of magnetic regions may comprise a first number of first magnetic regions and the second type of magnetic regions may comprise a plurality of sets of magnetic regions, each set comprising a second number of said second magnetic regions. The first magnetic region is composed of a magnetic material having a first coercivity, and the second magnetic region is composed of a magnetic material having a second coercivity, the first coercivity being higher than 1000Oe and the second coercivity being lower than 500Oe, or the second coercivity being higher than 1000Oe and the first coercivity being lower than 500 Oe. The first number of first magnetic regions may be spaced apart from each other, and the second number of second magnetic regions may also be spaced apart from each other. In the embodiment of the present invention, the first number may be greater than 2, and the second number may be set to be a suitable positive integer.
In some alternative embodiments, the first number of first magnetic regions may be distributed periodically or aperiodically.
The second number of the second magnetic regions may be respectively inserted into the intervals between the first number of the first magnetic regions, that is, a group of magnetic regions of the second type of magnetic regions may be inserted into the intervals of the first number of magnetic regions, so that the period of the first type of magnetic regions is non-integral multiple of the period of the second type of magnetic regions. For example, the period of the second type of magnetic region may be greater than 10 times the period of the first type of magnetic region, or the entire period length of the first type of magnetic region and the second type of magnetic region may be greater than the length of the anti-counterfeiting region of the anti-counterfeiting product attached to the anti-counterfeiting element, and preferably, the entire period length of the first type of magnetic region and the second type of magnetic region is greater than 10 times the length of the anti-counterfeiting region of the anti-counterfeiting product attached to the anti-counterfeiting element.
The manner in which the second number of the second magnetic regions are inserted into the spaces between the first number of the first magnetic regions may be arbitrary as long as the condition of the period of the first type of magnetic regions and the period of the second type of magnetic regions herein is satisfied. For example, one or more second magnetic regions may be inserted within one space of the first magnetic region.
In an alternative embodiment, the difference between the first number and the second number may be at least greater than 2, so as to ensure that one second magnetic region can be inserted into one space of the first magnetic region, and there is at least one blank space after the second magnetic region is inserted into each space of the first number of magnetic regions, so that when the second magnetic regions are periodically arranged, the manner in which the second magnetic regions can be inserted into the spaces is more diversified, thereby enabling a condition that the period of the second magnetic regions is sufficiently long.
Fig. 2(a) shows a schematic cross-sectional view of a security element according to an embodiment of the invention. As shown in fig. 2(a), the security element provided in the embodiment of the present invention may include: a substrate having a first surface and a second surface opposite to each other; and a first type of magnetic region and a second type of magnetic region formed in the substrate. The first type of magnetic region may comprise 4 first magnetic regions 21 and the second type of magnetic region may comprise a plurality of sets of magnetic regions, each set comprising 2 second magnetic regions 22. The first magnetic region is composed of a magnetic material having a first coercivity, and the second magnetic region is composed of a magnetic material having a second coercivity, the first coercivity being higher than 1000Oe and the second coercivity being lower than 500 Oe. 4 the arrangement of the period of the first magnetic region, and in addition, the arrangement period of the first type magnetic region may be the same as the arrangement period of the 4 first magnetic regions. Each set of 2 second magnetic regions is inserted into the space of 4 first magnetic regions. The second type of magnetic region is not fully listed in fig. 2(a) due to region limitations.
When the security element shown in fig. 2(a) is observed with the second magnetic regions as references, it is considered that an indefinite number of first magnetic regions may be randomly printed between every two second magnetic regions. The uncertainty can realize the hiding of the effective code, so that the anti-counterfeiting element is not easy to be identified and cracked.
In performing detection on the security element shown in fig. 2(a), the security element may first be magnetized in a first direction of the security element using a first magnetizing means, wherein a value of a first magnetic field strength (in Gs) of the first magnetizing means is greater than values of the first coercivity (in Oe) and the second coercivity (in Oe), and the first direction is parallel to a length direction of the security element. After the magnetization is completed, the sensor can be used to read the first magnetic encoding signal of the anti-counterfeiting element, as shown in fig. 2(b), the encoding signals of the first magnetic region are uniformly distributed, the magnetic encoding signals of the second magnetic region are distributed in the blank region of the magnetic encoding signals of the first magnetic region, and the corresponding distribution rule of the magnetic encoding signals of the two magnetic regions is uncertain.
After the first magnetic encoding signal is detected, the anti-counterfeiting element can be magnetized along the first direction of the anti-counterfeiting element by using a second magnetizing device, and the second magnetic field direction of the second magnetic field of the second magnetizing device is opposite to the first magnetic field direction, namely the first magnetic field direction and the second magnetic field direction form an angle of 180 degrees. The value of the magnetic field strength (in Gs) of the second magnetic field of the second magnetizing means may coincide with the value of the first coercivity (in Oe) or the second coercivity (in Oe), i.e. the value of the magnetic field strength (in Gs) of the second magnetic field is equal or substantially equal to the value of the first coercivity (in Oe) or the second coercivity (in Oe). Or the value of the magnetic field strength (in Gs) of the second magnetic field of the second magnetizing means may be between the values of the first coercivity (in Oe) and the second coercivity (in Oe). After this magnetization is complete, the sensor can be used to read the second magnetically encoded signal of the security element.
Fig. 2(c) shows a case where the value of the magnetic field strength (in Gs) of the second magnetic field is substantially equal to the value of the second coercive force (in Oe), as shown in the figure, the magnetic encoding signal of the second magnetic field region corresponding to the second coercive force is weakened so as to disappear. And because the second magnetic field intensity is smaller than the first coercive force, the magnetic code signal of the first magnetic field area corresponding to the first coercive force still exists. The distribution information of the first magnetic region can be determined from the second magnetic encoding signal shown in fig. 2(c), and the magnetic encoding signal of the second magnetic region can be obtained by subtracting the magnetic encoding signal shown in fig. 2(c) from the magnetic encoding signal shown in fig. 2(a), so that the distribution information of the second magnetic region can be determined.
Fig. 2(d) shows the case where the value of the magnetic field strength (in Gs) of the second magnetic field is between the values of the first coercivity (in Oe) and the second coercivity (in Oe), as shown in the figure, the magnetic encoding signal corresponding to the first coercivity will be significantly attenuated, while the magnetic encoding signal corresponding to the second coercivity will be reversed. The distribution information of the first magnetic region can be determined based on the magnetic encoding signal in the forward direction in fig. 2(d), and the distribution information of the second magnetic region can be determined based on the magnetic encoding signal in the reverse direction in fig. 2 (d). This determination may not be based on the magnetically encoded signal shown in fig. 2 (a).
Fig. 2(e) shows a case where the value of the magnetic field strength (Gs) of the second magnetic field is substantially equal to the value of the first coercive force (Oe), as shown in the figure, the magnetic encoding signal of the second magnetic field region corresponding to the first coercive force is weakened so as to disappear. Since the value of the second magnetic field strength is greater than the value of the second coercivity, the signal of the first magnetic field region corresponding to the second coercivity is inverted but still present. The distribution information of the second magnetic region can be determined from the second magnetic encoding signal shown in fig. 2(e), and the distribution information of the first magnetic region can be determined by subtracting the magnetic encoding signal shown in fig. 2(c) from the magnetic encoding signal shown in fig. 2 (a).
In some embodiments, the security element provided by embodiments of the present invention may include: a substrate having a first surface and a second surface opposite to each other; and a first type magnetic region, a second type magnetic region, and a third type magnetic region formed on the substrate. The first type of magnetic region may include a third number of first magnetic regions, the second type of magnetic region may include a plurality of sets of magnetic regions, each set of magnetic regions including a fourth number of said second magnetic regions, and the third type of magnetic region may include a plurality of sets of magnetic regions, each set of magnetic regions including a fifth number of third magnetic regions.
The first magnetic region is composed of a magnetic material having a first coercivity, the second magnetic region is composed of a magnetic material having a second coercivity, and the third magnetic region is composed of a magnetic material having a third coercivity. At least one of the first coercivity, the second coercivity and the third coercivity is higher than 1000Oe, and at least one of the first coercivity, the second coercivity and the third coercivity is lower than 500 Oe. The first magnetic region, the second magnetic region and the third magnetic region are arranged at intervals.
In some alternative embodiments, the first number of first magnetic regions may be distributed periodically or aperiodically.
The fourth number of the second magnetic regions and the fifth number of the third magnetic regions may be respectively inserted into intervals between the first number of the first magnetic regions, so that any two of a period of the first type of magnetic regions, a period of the second type of magnetic regions, and a period of the third type of magnetic regions are non-integral multiples. For example, the period of the second type of magnetic region and/or the period of the third type of magnetic region may be respectively greater than 10 times of the period of the first type of magnetic region, or the entire period length of the first type of magnetic region, the second type of magnetic region and the third type of magnetic region may be greater than the length of the security region of the security product to which the security element is attached, and preferably, the entire period length of the first type of magnetic region, the second type of magnetic region and the third type of magnetic region is greater than 10 times of the length of the security region of the security product to which the security element is attached.
As long as the periodic condition is satisfied, the fourth number of second magnetic regions and the fifth number of third magnetic regions may be inserted into the space between the first number of first magnetic regions. For example, one or more second magnetic regions, and/or one or more third magnetic regions may be inserted within one space of the first magnetic region.
In an alternative embodiment, the difference between the third number and the sum of the fourth number and the fifth number may be greater than or equal to 1, so as to ensure that one second magnetic region or one third magnetic region may be inserted into one interval of the first magnetic region, and thus, when the second magnetic region and the third magnetic region are periodically arranged, the manner in which the second magnetic region and the third magnetic region may be inserted into the interval may be more diversified, so that a condition that the period of the second magnetic region and the period of the third magnetic region are sufficiently long may be achieved. In the embodiment of the present invention, the first number may be greater than 2, for example, and the fourth number and the fifth number are both positive integers.
When the anti-counterfeiting element of the embodiment is detected, and the magnetic encoding detection is performed for the second time, the value of the magnetic field strength (in Gs) of the second magnetic field of the second magnetizing device is consistent with the value of the coercivity (in Oe) in the middle of the sequence among the first coercivity, the second coercivity and the third coercivity, so that the distribution of the magnetic regions of the anti-counterfeiting element can be determined through two detections.
Fig. 3(a) shows a schematic cross-sectional view of a security element according to an embodiment of the invention. As shown in fig. 3(a), the security element provided in the embodiment of the present invention may include: a substrate having a first surface and a second surface opposite to each other; and a first type of magnetic region, a second type of magnetic region, and a third type of magnetic region formed on the first surface of the substrate. The first type of magnetic region comprises 4 first magnetic regions 31, the second type of magnetic region may comprise a plurality of sets of magnetic regions, each set comprising 2 second magnetic regions 32, and the third type of magnetic region may comprise a plurality of sets of magnetic regions, each set comprising 1 third magnetic region 33. The coercivity of the magnetic material constituting the first magnetic region 31 is 2750Oe, the coercivity of the magnetic material constituting the second magnetic region 32 is 300Oe, and the coercivity of the magnetic material constituting the third magnetic region 33 is 1500 Oe. The first magnetic region 31, the second magnetic region 32, and the third magnetic region 33 are disposed at intervals, and the relative positions of the different magnetic regions are different. The distribution of the magnetic regions formed of the highest coercivity material and the magnetic regions formed of the lowest coercivity material may be the effective information, with the distribution of the magnetic regions formed of the intermediate coercivity material being the interfering information. The first number of the first magnetic regions may be arranged in a cycle, and in addition, the first type magnetic regions may be arranged in a cycle identical to that of the 4 first magnetic regions. Each set of 2 second magnetic regions and each set of 1 third magnetic region may be inserted into the spaces of the 4 first magnetic regions, respectively, wherein one space may be printed with one second magnetic region or one third magnetic region. The second type magnetic region and the third type magnetic region are not fully listed in fig. 3(a) due to region limitations.
In performing the detection on the security element shown in fig. 3(a), the security element may be first magnetized by a first magnetizing device along a first direction of the security element, wherein the first magnetizing device has a first magnetic field strength greater than 2750Oe, and the first direction is parallel to the length direction of the security element. After the magnetization is completed, the sensor can be used to read the first magnetic encoding signal of the anti-counterfeiting element, as shown in fig. 3(b), which shows three distribution specifications, and effective area distribution information cannot be obtained by simply analyzing the magnetic encoding signal.
After the first magnetic encoding signal is detected, the anti-counterfeiting element can be magnetized along the first direction of the anti-counterfeiting element by using a second magnetizing device, and the second magnetic field direction of the second magnetic field of the second magnetizing device is opposite to the first magnetic field direction, namely the first magnetic field direction and the second magnetic field direction form an angle of 180 degrees. The magnetic field strength of the second magnetic field of said second magnetizing means may be substantially equal to 1500Gs, i.e. the value of the magnetic field strength of the second magnetic field is substantially the same as the value of the coercivity in the middle of the ordering. As shown in fig. 3(c), the magnetic encoding signal of the third magnetic region is lost, the magnetic encoding signal of the first magnetic region is weakened, and the encoding signal of the second magnetic region is reversed. Based on fig. 3(c), distribution information of the first magnetic region and the second magnetic region can be determined. The magnetic encoding signal of the third magnetic region can be obtained by comparing fig. 3(b) with fig. 3(c), so that the distribution information of the third magnetic region can be determined.
Fig. 4 shows a schematic view of the detection of a security element according to an embodiment of the invention. As shown in fig. 4, when the security element is detected, the security element may be magnetized twice and detected twice. When the first magnetization is performed, the magnetic field strength of the first magnetic field is preferably higher than 5000Gs so that the value of the magnetic field strength may be larger than the value of the maximum coercive force (in Oe) of the magnetic material constituting the magnetic region. The direction of the first magnetic strength may be parallel to the direction of movement of the security element.
At the time of the second magnetization, the magnetic field strength (in Gs) of the second magnetic field may coincide with the values of the maximum coercivity (in Oe), the minimum coercivity (in Oe), and the coercivity in the middle of the ordering (in Oe) of the magnetic material constituting the magnetic region, or may be between the values of the maximum coercivity (in Oe) and the minimum coercivity (in Oe), the direction of the second magnetic field differing from the direction of the first magnetic field by 180 °, as shown by the N-and S-pole inversions of the first and second magnetic fields in fig. 4. After two magnetizations, the sensors used in the detection may be the same or different.
The specific detection principle and benefits of the anti-counterfeiting element are described in the foregoing, and will not be described in detail herein.
The security element according to the invention can be used as a label, a logo, a wide strip, a transparent window, a covering film, etc., and can be adhered to various articles by various adhesion mechanisms. For example, to high security products such as banknotes, credit cards, and high value added products.
In another aspect, the invention provides a security product using the security element according to any embodiment of the invention, the product includes but is not limited to various high security products and high value-added products such as bank notes, credit cards, passports, securities, and the like, and various packaging paper, packaging boxes, and the like.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
Those skilled in the art will understand that all or part of the steps in the method according to the above embodiments may be implemented by a program, which is stored in a storage medium and includes several instructions to enable a single chip, a chip, or a processor (processor) to execute all or part of the steps in the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (14)
1. A security element comprising:
a substrate, and
a plurality of types of magnetic regions formed on the surface of the substrate, the plurality of types of magnetic regions including at least a first type of magnetic region composed of one or more first magnetic regions composed of a magnetic material having a first coercivity and a second type of magnetic region composed of one or more second magnetic regions composed of a magnetic material having a second coercivity, wherein the first coercivity is different from the second coercivity, and a period of the first type of magnetic region is a non-integer multiple of a period of the second type of magnetic region.
2. The security element of claim 1, wherein the period of the second type of magnetic regions is greater than 10 times the period of the first type of magnetic regions.
3. The security element of claim 1,
the first coercivity is higher than 1000Oe, and the second coercivity is lower than 500 Oe; or
The second coercivity is higher than 1000Oe, and the first coercivity is lower than 500 Oe.
4. The security element according to claim 1, wherein the length of the whole period of the plurality of types of magnetic regions is greater than the length of the security region of the security product to which the security element belongs, and preferably, the length of the whole period of the plurality of types of magnetic regions is greater than 10 times the length of the security region of the security product to which the security element belongs.
5. The security element of claim 1,
the magnetic regions forming each type of magnetic region have the same or different specifications in the first direction;
the magnetic regions composing each type of magnetic region have the same or different specifications in a second direction which is vertical to the first direction and is in the same plane with the first direction;
the thicknesses of the magnetic regions constituting each type of magnetic region are respectively the same or different.
6. The security element according to any one of claims 1 to 5,
the first type of magnetic regions comprises a first number of the first magnetic regions;
the second type of magnetic region comprises a plurality of sets of magnetic regions, each set of magnetic regions comprising a second number of the second magnetic regions,
wherein the second number of the second magnetic regions is inserted in an interval between the first number of the first magnetic regions so that a period of the first kind of magnetic regions is non-integral multiple of a period of the second kind of magnetic regions.
7. The security element according to any one of claims 1 to 5, wherein the first magnetic region and the second magnetic region have a period greater than that of any one of the plurality of magnetic regions after being integrally arranged.
8. The security element of claim 6,
the first number of the first magnetic regions is periodically distributed;
the difference between the first number and the second number is at least greater than 2.
9. The security element of any one of claims 1 to 5, wherein the plurality of types of magnetic regions further comprises a third type of magnetic region comprised of a third magnetic region comprised of a magnetic material having a third coercivity, the third coercivity being different from the first and second coercivities;
the first type of magnetic regions comprises a third number of the first magnetic regions;
the second type of magnetic region comprises a first plurality of sets of magnetic regions, each set of magnetic regions comprising a fourth number of the second magnetic regions;
the third type of magnetic region comprises a second plurality of sets of magnetic regions, each set comprising a fifth number of the third magnetic regions;
wherein the fourth number of the second magnetic regions and the fifth number of the third magnetic regions are respectively inserted into intervals between the first number of the first magnetic regions, so that any two of the period of the first type of magnetic regions, the period of the second type of magnetic regions, and the period of the third type of magnetic regions are non-integral multiples.
10. The security element of claim 9,
the third number of the first magnetic regions is periodically distributed;
the third number is greater than the sum of the fourth number and the fifth number.
11. A method of testing a security element, the security element being in accordance with any one of claims 1 to 7, the method comprising:
magnetizing the security element in a first direction of the security element using a first magnetizing device, wherein a first magnetic field of the first magnetizing device has a magnetic field strength greater than the first and second coercivity;
reading a first magnetically encoded signal of the security element;
magnetizing the anti-counterfeiting element along the first direction of the anti-counterfeiting element by using a second magnetizing device, wherein the second magnetic field strength of the second magnetizing device is consistent with the first coercive force or the second coercive force, or the magnetic field strength of the second magnetic field of the second magnetizing device is between the first coercive force or the second coercive force, and the first magnetic field direction is opposite to the second magnetic field direction;
reading a second magnetically encoded signal of the security element; and
determining a distribution of magnetic regions of the security element based on the first magnetically encoded signal and the second magnetically encoded signal.
12. A method of testing a security element according to claim 9 or 10, the method comprising:
magnetizing the security element in a first direction of the security element using a first magnetizing device, wherein a magnetic field strength of a first magnetic field of the first magnetizing device is greater than the first, second, and third coercivity;
reading a first magnetically encoded signal of the security element;
magnetizing the security element in the first direction of the security element using a second magnetizing device, wherein a second magnetic field of the second magnetizing device has a magnetic field strength that is consistent with an ordered middle of the first, second, and third coercivity, and the first magnetic field direction is opposite to the second magnetic field direction;
reading a second magnetically encoded signal of the security element; and
determining a distribution of magnetic regions of the security element based on the first magnetically encoded signal and the second magnetically encoded signal.
13. The method according to claim 11 or 12, wherein the first magnetic field strength is greater than 5000 Gs.
14. A security product using a security element according to any one of claims 1 to 9.
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| CN202110454360.9A CN113516216A (en) | 2021-04-26 | 2021-04-26 | Anti-counterfeiting element, anti-counterfeiting element detection method and anti-counterfeiting product |
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| CN202110454360.9A CN113516216A (en) | 2021-04-26 | 2021-04-26 | Anti-counterfeiting element, anti-counterfeiting element detection method and anti-counterfeiting product |
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| JP2005125630A (en) * | 2003-10-24 | 2005-05-19 | Sankyo Seiki Mfg Co Ltd | Magnetic card and judging method of its authenticity |
| CN102576477A (en) * | 2009-09-01 | 2012-07-11 | 德国捷德有限公司 | Method and device for testing value documents |
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| CN105160753A (en) * | 2015-09-16 | 2015-12-16 | 深圳市倍量科技有限公司 | Banknote security thread anti-counterfeiting detection device and method |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005125630A (en) * | 2003-10-24 | 2005-05-19 | Sankyo Seiki Mfg Co Ltd | Magnetic card and judging method of its authenticity |
| CN102576477A (en) * | 2009-09-01 | 2012-07-11 | 德国捷德有限公司 | Method and device for testing value documents |
| CN103247412A (en) * | 2012-02-10 | 2013-08-14 | 中国人民银行印制科学技术研究所 | Structure and identification device for magnetizing two coercive magnetic materials |
| CN105160753A (en) * | 2015-09-16 | 2015-12-16 | 深圳市倍量科技有限公司 | Banknote security thread anti-counterfeiting detection device and method |
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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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