JP2006338325A - Paper sheet identification device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily read a minute pattern recorded on a paper sheet to efficiently identify the genuineness of the paper sheet. <P>SOLUTION: This paper sheet identification device identifies the genuineness of the paper sheet by: an imaging means imaging the prescribed minute pattern recorded on the paper sheet put in a main body of the paper sheet identification device; an imaging position adjustment means adjusting an imaging position by a galvanometer mirror such that the prescribed minute pattern recorded on the paper sheet is positioned in a position allowing the imaging by the imaging means; a collation means collating data imaged by the imaging means when the imaging position is adjusted by the galvanometer mirror and data of the previously recorded prescribed minute pattern; and an identification means identifying that the paper sheet put in the main body of the paper sheet identification device is genuine in the case of collation accordance, and identifying that the paper sheet is unjust in the case of collation discordance. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper sheet identification apparatus, and more particularly to a paper sheet identification apparatus that can identify the authenticity of a paper sheet using a fine pattern recorded on the paper sheet.

  2. Description of the Related Art Conventionally, as one method for identifying the authenticity of paper sheets such as banknotes and stock certificates, a method for optically reading and identifying a fine pattern recorded on a paper sheet is known. In this optical identification method, since a fine pattern composed of micro characters or the like is printed on a genuine paper sheet by printing, it is optically determined whether or not this fine pattern is recorded on the paper sheet to be identified. There is also proposed a paper sheet identification device using this analysis method for analysis (see Patent Document 1). The paper sheet identification apparatus according to this proposal captures the entire paper sheet with a detector composed of an image sensor and extracts a fine pattern from the image data to identify the authenticity of the paper sheet.

JP 2000-123218 A

  However, the conventional paper sheet identification device has a drawback that the cost of the detector is increased because the entire paper sheet is resolved by the detector. Moreover, since the fine patterns recorded on recent paper sheets are formed by micro characters that cannot be identified by the naked eye (naked eye) in order to prevent fraud of the paper sheets, the micro characters can be read efficiently. The emergence of paper sheet identification devices was awaited.

  5A and 5B will be further described with reference to FIGS. 5A and 5B. FIG. 5A is a surface view of the paper sheet a, and a predetermined portion of the surface (upper right in the illustrated example). ) Is recorded by printing a fine pattern composed of micro characters that can be read by magnifying with a magnifying glass or the like (see a portion in FIG. 5A). FIG. 5B is a rear view of the paper sheet a, and a fine pattern composed of micro characters that can be read by magnifying with a magnifying glass or the like is also provided at a predetermined portion (lower center in the illustrated example) of the rear surface. It is recorded by printing (see the portion B in FIG. 5B).

  As described above, since a fine pattern made of micro characters is printed on the paper sheet, a method for determining (identifying) the authenticity of the paper sheet using this is the entire pattern of the paper sheet. There is also a method of selectively extracting a fine pattern from the captured data and making a determination, but if this determination is to be performed at high speed, it is necessary to read a wide range of high-definition patterns at high speed There is a disadvantage that the hardware cost increases.

  Therefore, the present invention is capable of identifying the authenticity of a paper sheet by accurately reading a fine pattern consisting of micro characters recorded at a predetermined location on the paper sheet at a low cost and at a high speed. An object of the present invention is to provide a paper sheet identification device.

In order to achieve the above object, a paper sheet identification apparatus according to the present invention is characterized in that the invention according to claim 1 uses a predetermined fine pattern recorded at a predetermined position of the paper sheet. A paper sheet identification device for identifying the authenticity of a class, an imaging means for imaging a predetermined fine pattern recorded on a paper sheet placed in a main body of the paper sheet identification device, and the paper sheet An imaging position adjusting means for adjusting an imaging position by a galvanomirror so that a predetermined fine pattern recorded on a paper sheet put in a main body of a classifying device becomes a position where the imaging means can take an image; and the galvanometer mirror A collating unit that collates data captured by the imaging unit when the imaging position is adjusted and data of a predetermined fine pattern that is recorded in advance, and a main body of the paper sheet identification device when collation coincides Thrown Paper sheets identified as authentic and is characterized in that the sheet be made of a identification means for identifying fraud when the disagreement.
According to a second aspect of the present invention, there is provided a paper sheet identification device comprising a type input direction determining means for determining the type and input direction of a paper sheet input to the main body of the paper sheet identification device. It is said.
The paper sheet identification apparatus according to claim 3 of the present invention reads the magnetic data recorded on the paper sheet input to the main body of the paper sheet identification apparatus for the determination by the type input direction determination means. Or the paper sheet is optically read.
The paper sheet identification apparatus according to claim 4 of the present invention is characterized in that the imaging means is constituted by a CCD line sensor.
The paper sheet identification apparatus according to claim 5 of the present invention is characterized in that the imaging by the imaging means is performed during the conveyance of the paper sheet input to the main body of the paper sheet identification apparatus.
The paper sheet identification apparatus according to claim 6 of the present invention is characterized in that a light beam is received by the galvanometer mirror through a correction lens for correcting a focal length.

According to a first aspect of the present invention, there is provided a paper sheet identification device that captures an image of a predetermined fine pattern recorded on a paper sheet placed in a main body of the paper sheet identification device, and the paper sheet. An imaging position adjusting means for adjusting an imaging position by a galvano mirror so that a predetermined fine pattern recorded on a paper sheet put in a main body of the identification device can be imaged by the imaging means; and by the galvano mirror A collating unit that collates data captured by the imaging unit when the imaging position is adjusted and data of a predetermined fine pattern recorded in advance, and is input to the main body of the paper sheet identification device when the collation coincides The identification means identifies the printed paper sheet as authentic and identifies the paper sheet as illegal when the collation does not match. It is possible to perform imaging processing.
The paper sheet identification apparatus according to claim 2 of the present invention is provided with the type input direction determining means for determining the type and input direction of the paper sheet input to the main body of the paper sheet identification apparatus. The fine pattern position can be efficiently imaged by specifying the type and direction of the paper sheet input to the main body of the class identification device.
In the paper sheet identification apparatus according to claim 3 of the present invention, the type input direction determination means determines that the magnetic data recorded on the paper sheet input to the main body of the paper sheet identification apparatus is read. Or by optically reading the paper sheet, it is possible to easily realize the type loading direction discriminating means, and to authenticate the authenticity of the paper sheet by reading magnetic data or by optical reading. It can be performed.
In the paper sheet identification apparatus according to claim 4 of the present invention, since the imaging means is constituted by a CCD line sensor, the imaging means can be realized at low cost and easily.
In the paper sheet identification apparatus according to claim 5 of the present invention, since the imaging by the imaging means is performed during the conveyance of the paper sheet input to the main body of the paper sheet identification apparatus, the paper sheet identification process Time can be shortened.
In the paper sheet identification apparatus according to the sixth aspect of the present invention, the galvanometer mirror can receive the light beam through the correction lens that corrects the focal length, so that the identification accuracy can be improved.

  Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram of a paper sheet identification device according to the present invention, and a main body (hereinafter referred to as “device main body”) 1 of the paper sheet identification device includes the above-described FIG. A loading port 2 for loading the paper sheet a shown in (b) is provided. The device body 1 can be a single device for identifying (discriminating) the authenticity of the paper sheet a, and a station that accepts and processes paper sheets such as an automatic ticket vending machine and an automatic payment machine. It can also be incorporated in financial institutions such as business equipment and ATMs.

  In FIG. 1, reference numeral 3 denotes a conveyance path, which is a known conveyance path constituted by a combination of a plurality of rollers or a pair of endless belts. It is configured to be taken into the apparatus main body 1. In this conveyance path 3, when it is detected by a sensor such as a photosensor (not shown) that the paper sheet a has been introduced into the insertion slot 2, a motor (not shown) is driven to operate the conveyance path 3, and the paper The leaves a can be transported at a predetermined transport speed (for example, 1 m / sec). The motor of the conveyance path 3 is constituted by a pulse motor, and the conveyance position of the paper sheet a is accurately grasped by the number of pulses of the pulse motor. The transport position of the paper sheet a on the transport path 3 may be detected by arranging a number of photo sensors along the transport direction of the transport path 3.

  In FIG. 1, reference numerals 4 a and 4 b denote magnetic heads, which are provided on the upstream side of the conveyance path 3, that is, on the inlet 2 side of the conveyance path 3. Of these magnetic heads 4 a and 4 b, the magnetic head 4 a is provided so as to be in sliding contact with the upper surface side of the paper sheet “a” conveyed in the conveying path 3, and the magnetic head 4 b is a paper conveyed in the conveying path 3. It is provided in sliding contact with the lower surface side of the leaf a. In the illustrated example, the magnetic heads 4a and 4b are provided so as to face each other. However, the magnetic heads 4a and 4b are provided at predetermined intervals along the conveyance direction of the conveyance path 3, and the sheets a are magnetically separated by a pinch roller. You may make it press on head 4a, 4b, respectively.

  In FIG. 1, reference numeral 5 denotes a light source composed of a lamp, which is configured to keep the upper surface side of the paper sheet a conveyed in the conveyance path 3 at a predetermined brightness. Reference numeral 6 denotes a correction lens that corrects a focal length of an imaging process described later, and is provided between the conveyance path 3 and a galvanometer mirror 7 provided at a predetermined position above the conveyance path 3. The galvanometer mirror 7 will be described later.

  In FIG. 1, reference numeral 8 denotes a CCD line sensor, which is configured so that a light beam irradiated from a galvano mirror 7 can be imaged through a condenser lens 9. As this CCD line sensor 8, a commercially available line sensor can be used.

FIG. 2 is a schematic view of the galvanometer mirror 7, and the overall shape of the galvanometer mirror 7 is flat. The galvanometer mirror 7 formed in a flat shape has been previously proposed by the present applicant in Japanese Patent Application Laid-Open Nos. 7-175005 and 7-218857. However, when a current is applied to the coils C ₁ and C _{2 from} the drive circuit 7a, the plate P on which the mirror M is stretched generates torque around the X axis and the Y axis, and is reflected by the mirror M. It is comprised so that the inclination of a surface can be changed. In FIG. 2, a magnet for generating a magnetic field for applying a rotational force to the plate P is omitted for the sake of simplicity of the drawing, but the galvanometer mirror 7 also includes coils C ₁ and C ₂ . The principle of a galvanometer mirror that generates a rotational force on the plate P by an applied current and a magnetic field is employed.

  In FIG. 1, reference numeral 10 denotes a controller, and a block diagram showing its electrical configuration is shown in FIG. That is, the controller 10 controls the apparatus main body 1 in an integrated manner, and when the apparatus main body 1 is incorporated in a device such as an automatic ticket vending machine, a control mainly composed of a CPU for the device. It is configured to be connected to the device via a communication line.

  The controller 10 includes a control unit 12 including a CPU (central processing unit) that performs predetermined arithmetic processing based on system program data and working data stored in the storage unit 11. The control unit 12 includes a magnetic head unit 13 including magnetic heads 4a and 4b and processing circuits (not shown) via an I / O unit (not shown), a galvanometer mirror 7 and a driving circuit 7b. The galvanometer mirror unit 14, the CCD line sensor unit 15 including the CCD line sensor 8 and its processing circuit (not shown), the motor for driving the transport path 3 and its driving circuit (not shown). Is connected to a transport unit 16 including the. In addition to the above-described units, the control unit 12 detects a paper sheet a that has been input to the input port 2 and a sensor of a sensor (not shown) that includes a photo sensor that detects a conveyance position on the conveyance path 3. An amplifier or the like is also connected, but is omitted here.

  Hereinafter, the control operation of the apparatus main body 1 will be described with reference to the flowchart of FIG. Now, when the paper sheet a is input to the input port 2 (Yes in step 100; hereinafter, “S” is assumed), the paper sheet a is detected by a sensor (not shown) and the conveyance path 3 is driven. Is started and the taking-in of the paper sheet a into the apparatus main body 1 is started.

  When the taking-in of the paper sheet a is started, the paper sheet a is first applied to the front surface (see FIG. 5A) and the back surface (see FIG. 5B) of the paper sheet a by the magnetic heads 4a and 4b. The recorded magnetic data is read (S102). Then, based on the read data, it is determined whether the paper sheet a has been input to the input port 2 with the front side up or the reverse side up. That is, since the magnetic data recorded on the front side of the paper sheet a is different from the magnetic data recorded on the back side thereof, it is recorded on the front side of the paper sheet a by the magnetic head 4a. When the magnetic data read is read and the magnetic data recorded on the back side of the paper sheet a is read by the magnetic head 4b, the paper sheet a inserted into the insertion slot 2 The magnetic head 4a reads the magnetic data recorded on the back side of the paper sheet a, and the magnetic head 4b reads the magnetic data recorded on the front side of the paper sheet a. At that time, it is determined that the paper sheet a that has been input to the input port 2 has been input with the back side up.

  Although omitted in the flowchart of FIG. 4, the magnetic data recorded on the paper sheet a cannot be read by the magnetic heads 4a and 4b, or the read magnetic data is recorded on the paper sheet a. When it is different from the magnetic data, the paper sheet put in the slot 2 is determined to be a fake ticket, and the slot 2 is transported in the reverse direction of the transport path 3 (transport in the direction opposite to the arrow of the transport path 3 in FIG. 1). Discharged and returned. Moreover, although the determination of the input surface to the input port 2 of the paper sheet a was performed using the magnetic heads 4a and 4b, this can also be optically determined by a CCD camera or the like. However, as described above, the use of the magnetic heads 4a and 4b has an advantage that the determination can be made more easily.

  When the paper sheet a that has been input to the input port 2 is input with the front side facing up (Yes in S104), the galvanometer mirror 7 is configured as shown in FIG. 5A based on the current transport position of the paper sheet a. The portion A is adjusted to a position where it can be imaged by the CCD line sensor 8, and reading is performed by the CCD line sensor 8 (S106, S108). When the paper sheet a that has been input to the input port 2 is input with the back side up (No in S104), the galvanometer mirror 7 is moved to the position shown in FIG. 2) is adjusted to a position where it can be imaged by the CCD line sensor 8, and reading is performed by the CCD line sensor 8 (S107, S108). In reading by the CCD line sensor 8, the mirror M of the galvanometer mirror 7 is arranged in the width direction of the paper sheet a so that the entire fine pattern portion (a in FIG. 5A, b in FIG. 5B) can be read. It is shaken by.

  The storage unit 11 also stores in advance data of a fine pattern composed of micro characters when normally recorded (printed) on the portion A on the front surface and the bottom portion on the back surface of the paper sheet a (see FIG. 3), the stored data and the data read via the CCD line sensor 8 are collated, and the authenticity of the paper sheet a is identified (differentiated) (S110).

  The identification process described above is performed during the conveyance of conveying the paper sheet a through the conveyance path 3, and when the paper sheet a is determined to be genuine (sure ticket) (Yes in S112), the conveyance of the conveyance path 3 is performed. It continues as it is (see the arrow of the conveyance path 3 in FIG. 1) and is stored in a storage safe (not shown) (Yes at S114 and S116). In the case where the apparatus main body 1 is a single device that only identifies the authenticity of the paper sheet a, the fact that the inserted paper sheet a is a correct ticket is displayed via a display (not shown) and conveyed. The path 3 is reversely conveyed and returned to the inlet 2.

  On the other hand, when it is determined that the paper sheet a is fraudulent (false ticket) (No at S112), the transport path 3 is reversely transported, and the paper sheet a is discharged to the input port 2 and returned (S115).

  As described above, the apparatus main body 1 configured as described above determines the input surface of the paper sheet a input to the input port 2 with the magnetic heads 4a and 4b, and matches the determined input surface with the galvanometer mirror 7. Since the imaging position by the CCD line sensor 8 can be determined, the imaging process by the CCD line sensor 8 can be performed in a short time and efficiently. Moreover, since the imaging process of the fine pattern is performed by the CCD line sensor 8, it has a feature that a fine pattern made of micro characters can be analyzed with high accuracy.

  In the above-described example, the imaging means including the galvano mirror 7 and the CCD line sensor 8 is provided on one side (upper side in the example of FIG. 1) with the conveyance path 3 interposed therebetween. It may be provided on both sides, and the fine patterns recorded on the front side and the back side of the paper sheet a may be imaged. In the above example, the type of paper sheet and the input direction (input surface) are determined magnetically using a magnetic head, but this may be performed optically. When optically discriminating, it is performed by imaging one surface of the paper sheet a with a camera such as a CCD camera and analyzing the image data. Further, this determination may be performed based on the light transmission of the paper sheet, or may be performed based on the reflected light applied to the paper sheet.

It is a schematic block diagram of the paper sheet identification device which concerns on one embodiment of this invention. It is the schematic of a galvanometer mirror. It is a block diagram which shows the electric constitution of a controller. It is a flowchart which shows the control operation of this apparatus main body. It is a figure for demonstrating the fine pattern which consists of a micro character, (a) is a front view of paper sheets, (b) is a back view of paper sheets.

Explanation of symbols

a sheet M mirror P plate 1 apparatus main body 2 slot 3 transport path 4a, 4b magnetic head 5 light source 6 correction lens 7 galvanometer mirror 8 CCD line sensor 9 condenser lens 10 controller 11 storage unit 12 control unit 13 magnetic head Unit 14 Galvano mirror unit 15 CCD line sensor unit

Claims (6)

A paper sheet identification device for identifying the authenticity of a paper sheet using a predetermined fine pattern recorded at a predetermined position of the paper sheet,
An imaging means for imaging a predetermined fine pattern recorded on a paper sheet placed in a main body of the paper sheet identification device;
An imaging position adjusting unit that adjusts an imaging position by a galvanomirror so that a predetermined fine pattern recorded on a paper sheet that is input into a main body of the paper sheet identification device is a position where the imaging unit can capture an image;
Collating means for collating data captured by the imaging means when the imaging position is adjusted by the galvanometer mirror and data of a predetermined fine pattern recorded in advance;
An identifying means for identifying authenticity of a paper sheet input to the main body of the paper sheet identification device when collation is matched, and identifying the paper sheet as illegal when the collation is mismatched;
A paper sheet identification device comprising: 2. The paper sheet identification apparatus according to claim 1, further comprising a type insertion direction determination unit configured to determine the type and input direction of the paper sheet input to the main body of the paper sheet identification apparatus. Leaf identification device. 3. The paper sheet identification apparatus according to claim 2, wherein the determination by the type input direction determination means is performed by reading magnetic data recorded on a paper sheet input to a main body of the paper sheet identification apparatus, or A paper sheet identification apparatus characterized by optically reading the paper sheet. 4. The paper sheet identification apparatus according to claim 1, wherein the imaging unit is constituted by a CCD line sensor. 5. The paper sheet identification apparatus according to claim 1, wherein the imaging by the imaging unit is performed during conveyance of the paper sheet input to a main body of the paper sheet identification apparatus. Paper sheet identification device. 6. The paper sheet identification apparatus according to claim 1, wherein the galvanometer mirror receives a light beam through a correction lens that corrects a focal length.

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