JPH0927057A - Safety paper authenticity determination device - Google Patents
Safety paper authenticity determination deviceInfo
- Publication number
- JPH0927057A JPH0927057A JP7197100A JP19710095A JPH0927057A JP H0927057 A JPH0927057 A JP H0927057A JP 7197100 A JP7197100 A JP 7197100A JP 19710095 A JP19710095 A JP 19710095A JP H0927057 A JPH0927057 A JP H0927057A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- safety
- coil
- safety protection
- protection paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Inspection Of Paper Currency And Valuable Securities (AREA)
Abstract
(57)【要約】
【課題】極めて薄い磁性材よりなる安全線条が埋め込ま
れた安全保護紙に対しても経済的かつ確実にその安全線
条の特性を検知して安全保護紙の真偽判定を行うことが
できる安全保護紙の真偽判定装置を提供する。
【解決手段】励磁コイルと磁束検出用コイルと補償用コ
イルが一体化された構造を持つ磁気センサをデータ及び
磁気特性検出手段として用い、予め定められた安全線条
情報および磁気特性と比較する比較回路とを含んで構成
することにより、安全線条にクラック等の異常状態が存
在する場合でも、安全保護紙の真偽判定を確実に実行す
ることが可能である。
(57) [Abstract] [PROBLEMS] The authenticity of a safety protection paper is detected economically and reliably even for the safety protection paper in which the safety protection wire made of an extremely thin magnetic material is embedded. Provided is an authenticity determination device for safety protection paper, which can make a determination. SOLUTION: A magnetic sensor having a structure in which an exciting coil, a magnetic flux detecting coil and a compensating coil are integrated is used as data and magnetic characteristic detecting means, and is compared with predetermined safety line information and magnetic characteristic. By including the circuit, even if there is an abnormal state such as a crack in the safety line, it is possible to reliably execute the authenticity determination of the safety protection paper.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、証券類のように真
偽防止を必要とする安全保護紙の真偽判定装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a genuine / counterfeit determination device for security paper such as securities, which requires authenticity prevention.
【０００２】[0002]
【従来の技術】強磁性体材料からなる安全線条を用紙内
に埋め込んで偽造防止に備えた安全保護紙において、安
全保証性を向上させるために、その安全線条にデータを
書き込むことは実用化されつつある。また、より安全性
を高めるために特異な磁気特性を有する素材を用いるこ
ともある。（本願と同一出願人による特開平７−３２７
７８号「安全保護紙とその真偽判定装置」参照）2. Description of the Related Art In a safety protection paper prepared by embedding a safety wire made of a ferromagnetic material in a sheet to prevent forgery, it is practical to write data on the safety wire in order to improve safety assurance. It is being converted. In addition, a material having unique magnetic properties may be used in order to enhance safety. (JP-A-7-327 filed by the same applicant as the present application)
(See No. 78 “Safety protection paper and its authenticity determination device”)
【０００３】[0003]
【発明が解決しようとする課題】素材の有する特異な磁
気特性を利用する構成は安全対策上極めて有効であるこ
とが判っている。しかし、図１０に示すこれまでの真偽
判定装置では励磁磁界の印加手段として励磁電源２によ
り励磁される励磁コイル３を用い、磁気センサ４として
磁気ヘッドを用いているため、励磁コイル３の励磁磁界
が被測定磁性体１がない場合でも、磁気センサ４に入
り、被測定磁性体１の磁束密度変化が微小である場合に
はＳ／Ｎ比が悪くなる欠点があった。なお、５は磁気セ
ンサ４からの出力を増幅して検知信号をとり出す増幅器
である。また、材料によっては磁気異方性による励磁磁
界方向依存性が大きく一定方向でのみしか磁気特性が検
出できない欠点があった。安全線条に用いられる磁気ス
レッドは安全保護紙に挿入する都合上、一般に薄ければ
薄い程その安全保護紙に対する違和感が減少し好まし
い。この場合に、安全線条として用いられるている極め
て薄い磁性材の磁気特性を検出するには高感度の磁気セ
ンサを必要とする。また、真偽判定装置は安価であるこ
とが好ましく、データ検出用磁気センサと磁性特性検出
用磁気センサを兼用できればさらに経済的に有利であ
る。It has been found that the structure utilizing the unique magnetic characteristics of the material is extremely effective in terms of safety measures. However, in the conventional authenticity determination device shown in FIG. 10, since the exciting coil 3 excited by the exciting power supply 2 is used as the exciting magnetic field applying means and the magnetic head is used as the magnetic sensor 4, the exciting coil 3 is excited. Even if the magnetic field does not exist in the magnetic body 1 to be measured, there is a drawback that the S / N ratio deteriorates when the magnetic field enters the magnetic sensor 4 and the change in magnetic flux density of the magnetic body 1 to be measured is minute. Reference numeral 5 is an amplifier that amplifies the output from the magnetic sensor 4 and extracts a detection signal. Further, depending on the material, there is a drawback that the magnetic anisotropy greatly depends on the direction of the exciting magnetic field and the magnetic characteristics can be detected only in a fixed direction. For the convenience of inserting the magnetic thread used for the safety wire into the safety paper, generally, the thinner the magnetic thread is, the less uncomfortable the safety paper is, which is preferable. In this case, a highly sensitive magnetic sensor is required to detect the magnetic characteristics of an extremely thin magnetic material used as a safety wire. Further, the authenticity determination device is preferably inexpensive, and it is more economically advantageous if the data detection magnetic sensor and the magnetic characteristic detection magnetic sensor can be used in common.
【０００４】本発明の目的は、極めて薄い磁性材よりな
る安全線条が埋め込まれた安全保護紙に対しても経済的
かつ確実にその安全線条の特性を検知して安全保護紙の
真偽判定を行うことができる安全保護紙の真偽判定装置
を提供することにある。It is an object of the present invention to detect the characteristics of a safety protection sheet economically and reliably even if the safety protection sheet is made of an extremely thin magnetic material and is embedded in the safety protection sheet. An object of the present invention is to provide an authenticity determination device for safety protection paper that can make a determination.
【０００５】[0005]
【課題を解決するための手段】この目的を解決するため
に、本発明は励磁コイルと磁束検出用コイルと補償用コ
イルが一体化された構造を持つ磁気センサをデータ及び
磁気特性検出手段として用い、予め定められた安全線条
情報および磁気特性と比較する比較回路とを含んで構成
することを特徴とする。In order to solve this object, the present invention uses a magnetic sensor having a structure in which an exciting coil, a magnetic flux detecting coil and a compensating coil are integrated as data and magnetic characteristic detecting means. , And a comparison circuit for comparing predetermined safety line information and magnetic characteristics.
【０００６】[0006]
【発明の実施の形態】このような本発明装置により、安
全線条にクラック等の異常状態が存在する場合でも、安
全保護紙の真偽判定を確実に実行することが可能であ
る。With the apparatus of the present invention as described above, the authenticity of the safety protection sheet can be surely executed even when the safety line has an abnormal state such as a crack.
【０００７】[0007]
【実施例】以下本発明の実施例について説明するが、ま
ず、本発明で用いる補償コイル付き磁気センサの原理，
構造，作用について図１，図２を参照して説明する。強
磁性体の磁化特性は次のように表わされる。Embodiments of the present invention will be described below. First, the principle of the magnetic sensor with a compensation coil used in the present invention,
The structure and operation will be described with reference to FIGS. The magnetization characteristic of a ferromagnetic material is expressed as follows.
【数１】 Ｂ＝μＨ （１） Ｂ：磁束密度、 Ｈ：磁界の強さ、 μ：透磁率 ただし、μは一般に線形ではなく磁性材固有の非線形特
性を有している。## EQU1 ## B = μH (1) B: magnetic flux density, H: magnetic field strength, μ: magnetic permeability However, μ is generally not linear but has a non-linear characteristic peculiar to a magnetic material.
【０００８】この特性は、磁界の強さを変化させながら
磁束密度を測定することによって得られる。極めて薄い
（厚さ１μｍ以下）磁性膜や、磁性材が薄く塗布された
磁気テープ，磁気インク等の磁気特性を測定する場合に
は、この場合の磁性材料の磁化が極めて小さいため測定
が困難である。式（１）は次の式（２）のように書き直
すことができる。This characteristic is obtained by measuring the magnetic flux density while changing the strength of the magnetic field. When measuring the magnetic properties of extremely thin (thickness of 1 μm or less) magnetic tape, magnetic tape thinly coated with magnetic material, magnetic ink, etc., it is difficult to measure because the magnetization of the magnetic material in this case is extremely small. is there. Expression (1) can be rewritten as Expression (2) below.
【数２】 Ｂ＝μ0 Ｈ＋Ｊ （２） Ｈ：磁界の強さ、 Ｊ：磁性体の変化の強さ、 μ0 ：
真空透磁率 ここで、μ0 は極めて小さいので Ｂ≒Ｊとおくことが
できる。[Equation 2] B = μ 0 H + J (2) H: strength of magnetic field, J: strength of change of magnetic substance, μ 0 :
Vacuum permeability Here, since μ 0 is extremely small, B≈J can be set.
【０００９】検知コイルにより検知される電圧ｅはThe voltage e detected by the detection coil is
【数３】 ｅ＝−ｄφ／ｄｔ （３） φ：検知コイルを貫く磁束## EQU00003 ## e = -d.phi. / Dt (3) .phi .: magnetic flux penetrating the detection coil.
【数４】 φ＝∫Ｊｄｖ （４） であるから、微少体積ｄｖをもつ磁性体からの検知電圧
は極めて小さいことがわかる。Since φ = ∫Jdv (4), it can be seen that the detection voltage from the magnetic substance having a minute volume dv is extremely small.
【００１０】一方、図１に示すように補償コイル７を接
続した回路構成を有する検知コイル６に生じる電圧Ｖe
は次のように表わされる。On the other hand, as shown in FIG. 1, a voltage V e generated in the detection coil 6 having a circuit configuration in which the compensation coil 7 is connected.
Is expressed as follows.
【数５】 Ｖe ＝Ｖb −Ｖd （５） Ｖb ：検知コイルの電圧、 Ｖd ：補償コイルの電圧 被測定磁性体１が無い場合には、Ｖb ＝Ｖd になるよう
に調整しているためＶe ＝０となる。被測定磁性体１が
有る場合には、Equation 5] V e = V b -V d ( 5) V b: voltage detection coil, V d: as if there is no voltage measured magnetic substance 1 of the compensation coil will V b = V d Since it is adjusted, V e = 0. If there is a magnetic substance 1 to be measured,
【数６】 Ｖe ＝Ｎb ・Ｓb ・ｄＢ／ｄｔ （６） Ｎb ：センサコイルの巻数、Ｓb ：センサコイルの断面
積、Ｂ：コイル内部の磁束密度 となる。V e = N b · S b · dB / dt (6) N b : number of turns of the sensor coil, S b : cross-sectional area of the sensor coil, B: magnetic flux density inside the coil.
【００１１】ここで、式（２）に示すように、Ｂ＝μ0
ＨはキャンセルされてHere, as shown in the equation (2), B = μ 0
H has been canceled
【数７】 Ｖe ＝Ｎb ・Ｓb ・ｄｊ／ｄｔ （７） となり被測定磁性体に起因する磁気特性Ｊが得られる。
以上説明したように、薄膜のような磁化の小さな被測定
磁性体１を感度良く測定することができる。[Equation 7] V e = N b · S b · dj / dt (7) and the magnetic characteristic J due to the magnetic material to be measured is obtained.
As described above, the magnetic material 1 to be measured having a small magnetization such as a thin film can be measured with high sensitivity.
【００１２】次に、磁気異方性に無関係な特性検出につ
いて説明する。図２に示す本発明で用いる補償コイル付
磁気センサ４Ａを用いれば、円形ボビン４ａに励磁コイ
ル３，検知コイル６，補償コイル７を巻き付けた構造を
持っているので、端面ａにおける近傍磁界９は図３の矢
視のように全方向に均一に出ており、図４（ａ）（ｂ）
に示すように異方性を有する被測定磁性体１であって
も、磁気センサ４の何れかの場所で磁気特性が得られ
る。Next, characteristic detection irrelevant to magnetic anisotropy will be described. When the magnetic sensor with a compensation coil 4A used in the present invention shown in FIG. 2 is used, since the excitation coil 3, the detection coil 6, and the compensation coil 7 are wound around the circular bobbin 4a, the near magnetic field 9 at the end face a is As shown in the arrow of FIG. 3, it is projected uniformly in all directions, and FIG.
Even with the magnetic substance 1 to be measured having anisotropy as shown in FIG. 5, magnetic characteristics can be obtained at any place of the magnetic sensor 4.
【００１３】図５（ａ）（ｂ）は磁気異方性を有する被
測定磁性体１として用いられる安全線条２１からの検知
信号の波形を示しており、（ｂ）は（ａ）の１個の波形
の拡大図である。（ｂ）で振幅の大きい部分は歪量大で
ある。このような本発明装置によれば、磁性材でできた
安全線条２１にクラック等のひびが入っても、その影響
を無視することができる検知信号が得られる利点があ
る。FIGS. 5A and 5B show waveforms of detection signals from the safety wire 21 used as the magnetic body 1 to be measured having magnetic anisotropy, and FIG. 5B shows 1 of FIG. It is an enlarged view of an individual waveform. In (b), a large amplitude portion has a large amount of distortion. According to the device of the present invention as described above, even if the safety wire 21 made of a magnetic material is cracked by a crack or the like, it is possible to obtain a detection signal that can ignore the influence of the crack.
【００１４】次に、データ読み出しと磁気特性検出用セ
ンサの兼用機能について説明する。前記の式（６）によ
れば、検知電圧Ｖe はｄＪ／ｄｔ項に比例する。また磁
化Ｊは次式（８）のように書くことができる。Next, an explanation will be given of the dual function of the data reading sensor and the magnetic characteristic detecting sensor. According to the above equation (6), the detection voltage Ve is proportional to the dJ / dt term. Further, the magnetization J can be written as the following expression (8).
【数８】Ｊ＝ｘＨ （８） ｘ：磁化率、 Ｈ＝印加磁界強度 安全線条２１に書き込まれているデータは１／０に相当
する部分の磁化率が異なるので、磁化率に比例した検出
電圧の違いとなって現れる。また、励磁強度は円形な励
磁コイル３の作る磁界分布９により中心距離から次第に
減少する特性を有するので、図５の検知信号波形に示さ
れるごとく検知信号はデータ位置に依存する振幅変調部
分と磁性体の磁気履歴特性による波形歪部分とが同時に
現れる。この波形を分析することによってデータおよび
固有の磁気特性を同時に得ることができる。[Equation 8] J = xH (8) x: magnetic susceptibility, H = applied magnetic field strength The data written in the safety wire 21 has a different magnetic susceptibility at a portion corresponding to 1/0, and thus is proportional to the susceptibility. It appears as a difference in detection voltage. In addition, since the excitation intensity has a characteristic that it gradually decreases from the center distance due to the magnetic field distribution 9 formed by the circular excitation coil 3, the detection signal has the amplitude modulation portion and the magnetic field depending on the data position as shown in the detection signal waveform of FIG. The waveform distortion portion due to the magnetic hysteresis characteristic of the body appears at the same time. By analyzing this waveform, data and unique magnetic properties can be obtained simultaneously.
【００１５】次に、このような補償コイル付磁気センサ
４Ａを用いた本発明の装置の全体構成について説明す
る。図６は磁気センサを用いた本発明による真偽判定装
置の一実施例である。２２は強磁性材でできた安全線条
２１が埋め込まれた安全保護紙である。１０は安全保護
紙を搬送する搬送機である。４Ａは補償コイル付き磁気
センサである。２は磁気センサ４Ａと一体化されている
励磁コイルを励磁する励磁電源である。８は磁気センサ
４Ａによって検知された信号を増幅する差動増幅器、１
１はデータ再生回路、１２は磁気特性検出回路である。
１３は再生されたデータと磁気特性検出回路からの出力
結果から真偽を判定する真偽判定回路である。Next, the overall structure of the apparatus of the present invention using such a magnetic sensor 4A with a compensation coil will be described. FIG. 6 shows an embodiment of an authenticity determination device according to the present invention using a magnetic sensor. Reference numeral 22 is a safety protection paper in which a safety line 21 made of a ferromagnetic material is embedded. Reference numeral 10 is a transporting machine for transporting the safety protection paper. 4A is a magnetic sensor with a compensation coil. Reference numeral 2 is an exciting power source for exciting an exciting coil integrated with the magnetic sensor 4A. 8 is a differential amplifier for amplifying the signal detected by the magnetic sensor 4A, 1
Reference numeral 1 is a data reproducing circuit, and 12 is a magnetic characteristic detecting circuit.
Reference numeral 13 is a genuine / counterfeit determination circuit that determines the authenticity from the reproduced data and the output result from the magnetic characteristic detection circuit.
【００１６】図７（ａ）はデータ再生回路１１の一例
で、検波回路１４とディジタル化回路１５とよりなり、
図７（ｂ）の如く励磁電源２により振幅変調された信号
Ｓａから検波波形Ｓｂを検出し、意味のある１／０のデ
ィジタル信号Ｓｃに変換する機能を持っている。FIG. 7A shows an example of the data reproducing circuit 11, which comprises a detecting circuit 14 and a digitizing circuit 15.
As shown in FIG. 7B, it has a function of detecting a detection waveform Sb from the signal Sa amplitude-modulated by the excitation power supply 2 and converting it into a meaningful 1/0 digital signal Sc.
【００１７】図８は磁気特性検出回路１２の一例で、励
磁周波数を基本とした奇数次高調波周波数成分を分離す
る帯域フィルタ群１６と、各フィルタ出力を電力値に変
換する部分と変換されたアナログ値をディジタル値にす
るＡ／Ｄ変換器１７からなる。この回路は直接入力信号
をディジタル変換するＡ／Ｄ変換器と、スペクトラム分
析器の組み合わせであっても実現可能である。FIG. 8 shows an example of the magnetic characteristic detection circuit 12, in which a bandpass filter group 16 for separating odd harmonic frequency components based on the excitation frequency and a portion for converting each filter output into a power value are converted. The A / D converter 17 converts an analog value into a digital value. This circuit can be realized by a combination of an A / D converter that directly digitally converts an input signal and a spectrum analyzer.
【００１８】図９は真偽判定回路１３の一例である。デ
ータ再生回路１１と磁気特性検出回路１２からの信号と
ＲＯＭ１８ａ，１８ｂに記憶されている真のデータ及び
特性値を読みだし、比較回路１９ａ，１９ｂで比較し、
双方がそれぞれ一致していればＡＮＤ回路２０の出力に
より安全保護紙２２は真であると判定し、一致しないと
偽であると判定する。その結果は例えばＧＯ／ＮＯ表示
を行う表示装置や安全保護紙２２をリジェクトする判定
処理機ＭＨに送られ、有効に利用することができる。FIG. 9 shows an example of the authenticity judgment circuit 13. The signals from the data reproduction circuit 11 and the magnetic characteristic detection circuit 12 and the true data and characteristic values stored in the ROMs 18a and 18b are read out and compared by the comparison circuits 19a and 19b.
If they match, the output of the AND circuit 20 determines that the safety protection paper 22 is true, and if they do not match, it determines that it is false. The result is sent to, for example, a display device that performs GO / NO display or a determination processor MH that rejects the safety protection paper 22, and can be effectively used.
【００１９】[0019]
【発明の効果】以上詳細に説明したように、本発明によ
れば、安全保護紙に埋め込まれた安全線条によって安全
保護紙の真偽を判定する際に、安全線条に書かれたデー
タと磁気特性を単一の磁気センサ４Ａで判別できしかも
精度良く判定することができる。そのため、信頼性およ
び経済的効果が極めて優れている。As described in detail above, according to the present invention, when the authenticity of the safety protection paper is judged by the safety protection wire embedded in the safety protection paper, the data written in the safety protection wire is determined. The magnetic characteristics can be determined by the single magnetic sensor 4A, and the determination can be performed with high accuracy. Therefore, the reliability and the economical effect are extremely excellent.
【図１】本発明に用いる補償コイル付磁気センサ検知回
路例を示す回路図である。FIG. 1 is a circuit diagram showing an example of a magnetic sensor detection circuit with a compensation coil used in the present invention.
【図２】本発明に用いる補償コイル付磁気センサの例を
示す斜視略図である。FIG. 2 is a schematic perspective view showing an example of a magnetic sensor with a compensation coil used in the present invention.
【図３】本発明に用いる磁気センサの近傍磁界強度を説
明するための斜視概念略図である。FIG. 3 is a schematic perspective view for explaining the near magnetic field strength of the magnetic sensor used in the present invention.
【図４】本発明に用いる磁気センサによる横方向（ａ）
と縦方向（ｂ）の磁気異方性磁性体の磁化特性測定を説
明するための斜視概念略図である。FIG. 4 is a lateral direction (a) of the magnetic sensor used in the present invention.
2A and 2B are schematic conceptual perspective views for explaining the measurement of the magnetization characteristics of the magnetic anisotropic magnetic body in the vertical direction (b).
【図５】本発明装置による検知信号波形（ａ）とその拡
大波形（ｂ）を示す図である。FIG. 5 is a diagram showing a detection signal waveform (a) and its enlarged waveform (b) by the device of the present invention.
【図６】本発明装置による真偽判定装置の実施例を示す
接続系統図である。FIG. 6 is a connection system diagram showing an embodiment of an authenticity determination device according to the device of the present invention.
【図７】図６の実施例に用いるデータ再生回路の一例を
示すブロック図（ａ）と各部波形を示す図（ｂ）であ
る。7 is a block diagram (a) showing an example of a data reproducing circuit used in the embodiment of FIG. 6 and a diagram (b) showing waveforms of respective parts.
【図８】図６の実施例に用いる磁気特性検出回路の一例
を示すブロック図である。8 is a block diagram showing an example of a magnetic characteristic detection circuit used in the embodiment of FIG.
【図９】図６の実施例に用いる真偽判定回路の一例を示
すブロック図である。9 is a block diagram showing an example of a true / false determination circuit used in the embodiment of FIG.
【図１０】従来の真偽判定装置の例を示す配列図であ
る。FIG. 10 is an array diagram showing an example of a conventional authenticity determination device.
１ 被測定磁性体 ２ 励磁電源 ３ 励磁コイル ４ 磁気センサ ５ 増幅器 ６ 検知コイル ７ 補償コイル ８ 差動増幅器 ９ 磁気ベクトル １０ 搬送機 １１ データ再生回路 １２ 磁気特性検出回路 １３ 真偽判定回路 １４ 検波回路 １５ ディジタル化回路 １６ 基本帯域フィルタ １７ Ａ／Ｄ変換器 １８ ＲＯＭ １９ 比較回路 ２０ ＡＮＤ回路 ２１ 安全線条 ２２ 安全保護紙 DESCRIPTION OF SYMBOLS 1 Magnetic substance to be measured 2 Excitation power supply 3 Excitation coil 4 Magnetic sensor 5 Amplifier 6 Detection coil 7 Compensation coil 8 Differential amplifier 9 Magnetic vector 10 Carrier machine 11 Data reproduction circuit 12 Magnetic characteristic detection circuit 13 True / false determination circuit 14 Detection circuit 15 Digitizing circuit 16 Basic band filter 17 A / D converter 18 ROM 19 Comparison circuit 20 AND circuit 21 Safety line 22 Safety protection paper
フロントページの続き (72)発明者 水上 一郎 東京都杉並区久我山一丁目７番41号 岩崎 通信機株式会社内 (72)発明者 榎本 皓平 東京都杉並区久我山一丁目７番41号 岩崎 通信機株式会社内Front Page Continuation (72) Inventor Ichiro Mizukami 1-741 Kugayama, Suginami-ku, Tokyo Within Iwasaki Communications Co., Ltd. In the company
Claims (2)
特異な磁気履歴曲線の変化を示す強磁性体材料からなる
安全線条が用紙内に埋め込まれている安全保護紙を取扱
い対象として、 励磁コイルと磁束検出用コイルと補償用コイルとが一体
化された構造を持つ磁気センサと、 該磁気センサによって検出された強磁性体材料の履歴曲
線が真性の安全線条に対応して予め求めてある固有の磁
気履歴特性と適正に一致するか否かにより、前記安全保
護紙が真性であるか又は偽造であると判定し得るように
構成された判定手段とを備えた安全全保護紙の真偽判定
装置。1. A safety protection paper in which a safety wire made of a ferromagnetic material showing a change in magnetic history curve peculiar to an exciting magnetic field in which the strength of a magnetic field changes is embedded in a paper. , A magnetic sensor having a structure in which an exciting coil, a magnetic flux detecting coil, and a compensating coil are integrated, and a history curve of a ferromagnetic material detected by the magnetic sensor corresponds to an intrinsic safety line in advance. A safety all-protection paper provided with a determination means configured to determine whether the safety protection paper is genuine or counterfeit, depending on whether or not the obtained unique magnetic history characteristic properly matches. Authenticity determination device.
るように加工された部分を意味ある情報とした強磁性体
材料からなる安全線条が埋め込まれている安全保護紙を
取扱い対象として、 励磁コイルと検知コイルと補償コイルとが一体化された
構造を持った磁気センサと、 該磁気センサによって前記安全線条上に書き込まれた情
報を読み出し、該安全線条に対して予め定めてある情報
と適正に一致するか否かによって、前記安全保護紙が真
性であるか又は偽造であると判定し得るように構成され
た判定手段とを備えた安全保護紙の真偽判定装置。2. A safety protection paper in which a safety wire made of a ferromagnetic material is embedded, in which a portion processed so that the magnetic flux density is changed with respect to an externally applied magnetic field has meaningful information, is handled. A magnetic sensor having a structure in which an excitation coil, a detection coil, and a compensation coil are integrated, and information written on the safety line is read by the magnetic sensor, and the safety line is predetermined. An authenticity determination device for a safety protection sheet, comprising: a determination unit configured to determine whether the safety protection sheet is genuine or counterfeit depending on whether or not the information properly matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19710095A JP3499054B2 (en) | 1995-07-11 | 1995-07-11 | Authenticity determination device for safety paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19710095A JP3499054B2 (en) | 1995-07-11 | 1995-07-11 | Authenticity determination device for safety paper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0927057A true JPH0927057A (en) | 1997-01-28 |
| JP3499054B2 JP3499054B2 (en) | 2004-02-23 |
Family
ID=16368731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19710095A Expired - Lifetime JP3499054B2 (en) | 1995-07-11 | 1995-07-11 | Authenticity determination device for safety paper |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3499054B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009041957A (en) * | 2007-08-07 | 2009-02-26 | Tdk Corp | Signal detection system |
| JP2009122006A (en) * | 2007-11-16 | 2009-06-04 | Tdk Corp | Signal extracting apparatus |
| US9234877B2 (en) | 2013-03-13 | 2016-01-12 | Endomagnetics Ltd. | Magnetic detector |
| US9239314B2 (en) | 2013-03-13 | 2016-01-19 | Endomagnetics Ltd. | Magnetic detector |
| US9427186B2 (en) | 2009-12-04 | 2016-08-30 | Endomagnetics Ltd. | Magnetic probe apparatus |
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-
1995
- 1995-07-11 JP JP19710095A patent/JP3499054B2/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009041957A (en) * | 2007-08-07 | 2009-02-26 | Tdk Corp | Signal detection system |
| JP2009122006A (en) * | 2007-11-16 | 2009-06-04 | Tdk Corp | Signal extracting apparatus |
| US10634741B2 (en) | 2009-12-04 | 2020-04-28 | Endomagnetics Ltd. | Magnetic probe apparatus |
| US12092708B2 (en) | 2009-12-04 | 2024-09-17 | Endomagnetics Ltd. | Magnetic probe apparatus |
| US9427186B2 (en) | 2009-12-04 | 2016-08-30 | Endomagnetics Ltd. | Magnetic probe apparatus |
| US11592501B2 (en) | 2009-12-04 | 2023-02-28 | Endomagnetics Ltd. | Magnetic probe apparatus |
| US9808539B2 (en) | 2013-03-11 | 2017-11-07 | Endomagnetics Ltd. | Hypoosmotic solutions for lymph node detection |
| US9239314B2 (en) | 2013-03-13 | 2016-01-19 | Endomagnetics Ltd. | Magnetic detector |
| US9523748B2 (en) | 2013-03-13 | 2016-12-20 | Endomagnetics Ltd | Magnetic detector |
| US9234877B2 (en) | 2013-03-13 | 2016-01-12 | Endomagnetics Ltd. | Magnetic detector |
| US10595957B2 (en) | 2015-06-04 | 2020-03-24 | Endomagnetics Ltd | Marker materials and forms for magnetic marker localization (MML) |
| US11504207B2 (en) | 2015-06-04 | 2022-11-22 | Endomagnetics Ltd | Marker materials and forms for magnetic marker localization (MML) |
| US12161513B2 (en) | 2015-06-04 | 2024-12-10 | Endomagnetics Ltd | Marker materials and forms for magnetic marker localization (MML) |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3499054B2 (en) | 2004-02-23 |
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