JP3325750B2 - Safety protection paper and its authenticity judgment device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates are those relating <br/> safety protective paper that requires forgery prevention as securities such and its authenticity determination apparatus.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 7-32778 "Safety protection paper and its authenticity judgment apparatus" proposed by a part of the present inventors.
The security paper is characterized in that the security line is made of ferromagnetic material in which the data for security assurance is fixed or semi-fixed and embedded in the paper. It has a structure.

[0003]

However, the width of the safety filament is generally as thin as 1 mm or less, and data is written in a direction perpendicular to the longitudinal direction of the paper. Hereinafter, since the paper is used by arranging it so that the longitudinal direction is the left-right direction (horizontal direction), the direction orthogonal to the horizontal direction is defined as the vertical direction. Therefore, in order to read the data, FIG.
As shown in FIG. 3, since data is written in the safety line 3 provided in the longitudinal direction (the direction of arrow AA) of the security paper 1, the magnetic head or the like is moved in the vertical direction which is the direction of the safety line 3. Of the safety protection paper 1 by moving the magnetic sensors 2 of FIG. 1 or by a plurality of magnetic sensors 4 such as a multi-channel magnetic sensor juxtaposed so as to respectively cover the unit data area on the safety filament 3 as shown in FIG. In the lateral direction (arrow B
−B direction) to read the data by moving it. However, in any case, since the structure of the apparatus is complicated, there is a drawback that it is difficult to read out and use the security assurance data with a simple configuration and at a high speed.

[0004] The present invention is, safety protective paper and its authenticity of the special configuration that does not decrease the safety guarantee performance while taking the easy easy Do construction
And purpose thereof is to provide a determination device.

[0005]

Means for Solving the Problems] To achieve the previous SL object, security paper according to the present invention is written with data
Safety line made of ferromagnetic material embedded in paper
Each unit data area in the safety line is
Structured so as to be inclined with respect to the length direction of all filaments
Have been. Further, the authenticity judgment of the security paper according to the present invention is performed.
The device is made of a ferromagnetic material with written data.
All streaks are embedded in the paper, and
Each unit data area is inclined with respect to the length direction of the safety line.
Handles security papers configured to be skewed
As an object, the safety line where the data is written
Exciting means for applying an exciting magnetic field and the length of the safety wire
Has a long and narrow detection space, and the detection space is
A magnetic cell arranged to match the angle of the inclination of all the filaments
And capacitors, said safety umbilical and said magnetic sensor move relative
Is generated due to a change in the excitation magnetic field applied to the magnetic sensor.
A reading means for reading a detection signal from the generated data
Stage and the read detection signal are stored in the predetermined data.
Whether the security paper is true depending on whether
Alternatively, it has a configuration provided with a judging means for judging whether it is false .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS According to the present invention, data writing
Safety line made of ferromagnetic material embedded in paper
Each unit data area in the safety streak is
So that they are arranged inclined with respect to the length direction of the safety filament
Since it is configured, the detection space of the magnetic sensor has an elongated shape longer than the length of the safety wire embedded in the safety protection paper, and is arranged so as to match the angle of inclination of the safety wire. By using a true / false judgment device, simply moving the magnetic sensor in the direction orthogonal to the safety filament
The required detection output can be read safely and at high speed.

[0007]

[Principle] The present invention will be described below in detail with reference to the drawings. First, the principle of the present invention will be described. Since the security filament embedded in the security paper is a ferromagnetic material, data can be written using its magnetic properties. The case where the difference in magnetic permeability is used as data will be described.

FIG. 1A shows an example of a magnetic field 6 near the safety wire 3 on which data is written. When a uniform magnetic field is applied to such a safety wire 3, the magnetic flux density of the near magnetic field 6 changes due to the difference in magnetic permeability. The near-field magnetic field 6 has a sensing coil 5 whose width is equal to or smaller than the data interval x (width y) and which has a sensing space sufficiently longer than the length of the safety filament 3.
The detection coil 5 of the magnetic sensor made as described above is obliquely crossed with the safety filament 3 at a certain angle α. From Gauss's law

E = −dφ / dt (1) e: detection voltage φ: magnetic flux penetrating the detection coil

[Mathematical formula-see original document] [phi] = [Delta] Bds (2) B: magnetic flux density in the vicinity S: area in the detection coil [mathematical formula-see original document] The voltage e detected by the magnetic sensor is proportional to the time change of the entire magnetic flux in the detection coil 5. . When the width of the detection coil 5 is kept narrow and constant, and the detection coil 5 or the safety wire 3 is moved in the moving direction A orthogonal to the safety wire 3, the data in which the magnetic flux density changes are successively detected. 5, a signal is generated as a detection voltage e at a time interval (t _d ) proportional to the position of the data as shown in FIG.

FIG. 2 shows a state in which the magnetic sensor 2 is disposed so as to be oblique to the safety line 3 with respect to the security paper 1 in which the safety line 3 is provided in the vertical direction. If such a magnetic sensor 2 is used, the safety filament 3 embedded in the security paper 1
By simply moving the magnetic sensor 2 or the security paper 1 in the moving direction (BB), the detection voltage e can be easily read.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A security paper according to the present invention is used for writing data.
Safety line made of ferromagnetic material embedded in paper
Each unit data area in the safety streak is
So as to be arranged inclined relative to the longitudinal direction of the safety striatum
It is configured. Therefore, as shown in FIG. 3, if the inclination angle β of each unit data area in the safety filament 3 with respect to the length direction of the safety filament 3 is set to the inclination angle α of the magnetic sensor 2, the detection of the magnetic sensor 2 can be performed. The width ( width of the detection space) is prevented from overlapping the adjacent unit data area, and a large amount of data can be recorded efficiently.

[0011] Figure 4 is recorded in the security paper according to the present invention
1 is a configuration example of a magnetic sensor 2 used for reading data . A rectangular detection coil 5 having a reduced width is arranged on a substrate 7 made of ceramic or resin. An excitation magnet 8 for applying a magnetic field is uniformly attached to the back side of the substrate 7. When arranging the detection coil 5, the substrate 7
In order to reduce the irregularities on the top, it is also effective to increase the data reading sensitivity by embedding the coil in the groove on the substrate 7 or by smoothly covering the surface with resin or the like. Further, the detection coil 5 can be formed by winding a conductive wire or printing it as a pattern on the substrate 7. A configuration in which an excitation coil is separately provided instead of the excitation magnet 8 for applying a magnetic field and a magnetic field is generated by a current is also effective.

FIG. 5 shows an example of the configuration of a magnetic sensor 2A with a compensation coil. The magnetic sensor 2A includes an excitation coil 9 for generating a magnetic field by AC excitation, a detection coil 5 for detecting a detection signal, and a compensation coil 1 for canceling the excitation magnetic field.
0 is integrated.

FIG. 6 shows the authenticity of the security paper according to the present invention.
FIG. 2 is a block diagram showing an embodiment of a true / false determination device for determining the authenticity. Reference numeral 1 denotes a security paper in which the security filament 3 in which the security data is written is embedded, and reference numeral 11 denotes a transport device for moving the security paper 1. Reference numeral 2 denotes a magnetic sensor in which the magnetic field applying means (8) shown in FIG. The magnetic sensor 2 is arranged at a certain angle with respect to the transport direction. For example, assuming that the width of the safety wire 3 is 1 mm, the minimum data interval is 3 mm, and the width of the detection coil is 1.5 mm, the safety wire 3 is arranged at an angle from tan θ = 1 / (3-1.5) to θ = 33.6 °. do it. If the data is written diagonally (see FIG. 3), the minimum interval of the data can be narrowed down to the same as the width y of the detection coil 5, and high-density data can be obtained. Magnetic sensor 2
Are read by the amplifier 12 and are sent to the waveform shaping circuit 13. The waveform shaping circuit 13 converts an analog signal into a digital signal by a comparator.
The output is input to the authenticity judgment circuit 14 to judge whether the data is genuine or not, and the authenticity information is sent to the judgment display device 20 and the judgment processing device 21 at the subsequent stage.

FIG. 7 shows an example of the waveform shaping circuit 13, and FIG. 8 shows the signal waveform of each part. (A) is a safety line 3 (tag) on which data is written, and a detection signal from the magnetic sensor 2 is as shown in (b). In the input detection signal, as shown in (c), a signal change portion is emphasized by a differentiating circuit having a differential constant determined by a capacitor _CS and a resistor _RS . (D) is an output signal of the comparator COMP, which is converted into a digital 1/0 signal by a threshold level set voltage by a digitizing circuit including resistors R3 and R4 as hysteresis constants and a variable resistor VR for reference voltage. You. The digital signal is output as a time change depending on the length and interval of the data width as shown in FIG.

FIG. 9 shows an example of the configuration of the authenticity judgment circuit 14. The serial data from the waveform shaping circuit 13 is converted into parallel data by the serial / parallel circuit 17, and the data and the ROM 18 are converted.
The predetermined true data stored in the
The data is read out from the reference numeral 18 and compared by the comparison circuit 19. If the data match, the security paper 1 is determined to be true, and if not, the security paper 1 is determined to be false. The result is, for example, GO / N
The information is sent to the display device 20 for performing the O display and the determination processing device 21 for rejecting the security paper 1, and the appropriate processing is performed.

[0016]

As described in detail above, the present invention provides
Safety with excellent safety assurance while adopting a simple configuration
Provide protective paper. Uses a magnetic sensor that is positioned obliquely to the safety line embedded in the security paper .
To when I was, a problem the data that has been written on the safety streak
Data from the storage area.
Phenomenon that data reading errors can be prevented
Can be used to store large amounts of data
Effect, and the security and practicality of safety paper
There is also a special effect that it can be enhanced.

[Brief description of the drawings]

Is a perspective view for explaining the operation principle of the authenticity determination apparatus applied to a security paper according to the invention, FIG (a) and a waveform diagram showing a detection voltage (b).

It is a plan view showing an arrangement example of FIG. 2 and cross the magnetic sensor to be applied to the security paper in accordance with the present invention the security paper to be detected.

FIG. 3 is a plan view for explaining an example of an arrangement of data storage areas of safety stripes on the security paper according to the present invention.

Is a perspective view showing a structural example of a cross-type magnetic sensor applied to security paper due to the present invention; FIG.

5 is a perspective view showing a structural example of the magnetic sensor with compensation coils to be applied to the security paper in accordance with the present invention.

FIG. 6 is a system diagram showing an example of the structure of the authenticity determination device applied to the security paper according to the present invention.

FIG. 7 is a circuit diagram showing an example of a waveform shaping circuit used in the device of FIG.

FIG. 8 is a diagram showing an example of waveforms at various points in the circuit of FIG. 7;

9 is a block diagram showing a specific example of the authenticity determination circuit to be applied to the security paper in accordance with the present invention.

FIG. 10 is a perspective view showing a conventional reading method of a safety filament used for a security paper.

FIG. 11 is a perspective view showing a conventional reading method of a safety line used for a security paper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Safety protection paper 2 Magnetic sensor 3 Safety line 4 Multi-channel magnetic sensor 5 Detection coil 6 Near magnetic field 7 Substrate 8 Excitation magnet 9 Excitation coil 10 Compensation coil 11 Driver 12 Amplifier 13 Waveform shaping circuit 14 Authenticity judgment circuit 15 Differentiation Circuit 16 Digitizing circuit 17 Serial-parallel conversion circuit 18 ROM 19 Comparison circuit 20 Judgment display device 21 Judgment processing device

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Ichiro Mizukami 1-7-141 Kugayama, Suginami-ku, Tokyo Inside Iwasaki Communication Equipment Co., Ltd. (72) Inventor Kohei Enomoto 1-7-14 Kugayama, Suginami-ku, Tokyo (56) References JP-A-3-97084 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B42D 5/00-15/10 G07D 7 / 00

Claims (2)

(57) [Claims] 1. A safety line made of a ferromagnetic material on which data is written is embedded in a sheet, and each unit data area in the safety line is inclined with respect to the length direction of the safety line. security paper, characterized in that configured so that the array Te. 2. The method according to claim 1 , wherein the ferromagnetic material to which data is written is
Safety line is embedded in the paper, the safety line
Each unit data area in the line is in the length direction of the safety line.
Use a security paper that is configured to be inclined
As an object to be handled , an excitation magnetic field is applied to the safety wire on which the data is written.
And an elongated detection space longer than the length of the safety wire.
And the detection space matches the angle of the inclination of the safety filament.
When the magnetic sensor arranged as described above, the safety wire and the magnetic sensor relatively move
Before being generated by a change in the exciting magnetic field to the magnetic sensor
Reading means for reading a detection signal from the data, and detecting the read detection signal with predetermined data.
Whether the security paper is true or not depending on whether
Trueness of the security paper provided with a determination means for determining whether it is false
False judgment device .