JP2006338326A - Device for authenticating paper sheets - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently discriminate the authenticity of paper sheets by detecting glossiness of the paper sheets. <P>SOLUTION: A device for authenticating paper sheets discriminates the authenticity of the paper sheets by an irradiation and light receiving means for irradiating the front surface or rear surface of the paper sheets by scanning through a galvanometer mirror with the light generated by a light generating means, and for receiving the reflected light from the front surface or rear surface of the paper sheets through the galvanometer mirror, a glossiness detecting means for detecting the glossiness of the front surface or rear surface of the paper sheets based on the reflected light received, a comparing means for comparing the detected glossiness with pre-stored glossiness of the true paper sheets and an authenticating means for recognizing the paper sheets put in the body of the device for authenticating paper sheets as true if the comparison is good and as false if the comparison is not good. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a paper sheet identification device, and more particularly to an apparatus that can identify the authenticity of a paper sheet using the glossiness of the front or back surface of the paper sheet.

  Conventionally, as one method for identifying the authenticity of paper sheets such as banknotes and stock certificates, it has been known to detect the glossiness of the front or back surface of paper sheets, and this method was used. A paper sheet identification device has also been proposed (see Patent Document 1).

  That is, as shown in FIG. 6 (a), predetermined characters and pictures are printed on the surface of the paper sheet a, and as shown in FIG. 6 (b), the paper sheet a Predetermined characters and pictures are also printed on the back surface of the paper, and these are printed so as to exhibit a specific glossiness by a special printing method. Special processing such as “watermark” is also applied. For this reason, there is a difference between the glossiness of a genuine paper sheet and the glossiness of a paper sheet forged by copying it. The glossiness is optically detected, and the detected glossiness and the glossiness of a genuine paper sheet are collated to identify the authenticity of the paper sheet.

  The above-mentioned glossiness detection is performed based on the intensity of specularly reflected light that is reflected at an angle equal to the incident angle when a sheet is irradiated with light rays at a predetermined incident angle, and an angle equal to the incident angle. There are a case where it is obtained based on the intensity of diffusely reflected light (diffuse reflected light) that is reflected by other than the above, and a case where the intensity of specularly reflected light and the intensity of diffusely reflected light are obtained by processing according to a predetermined formula. The glossiness detection of the present invention can be employed in any of the above cases.

JP 2004-234274 A

  However, the conventional paper sheet device that detects the glossiness of the paper sheet and identifies the authenticity of the paper sheet is based on the intensity of the specular reflection light and the intensity of the irregular reflection light. In order to identify the light source, two light receivers for specular reflection light and irregular reflection light are required, and if the glossiness of a wide range of paper sheets is detected, the irradiation light receiving equipment increases accordingly. was there.

  Accordingly, the present invention has been made to solve the above-described drawbacks, and an object thereof is to detect the glossiness of paper sheets based on regular reflection light and irregular reflection light with a simple configuration. Another object of the present invention is to provide a paper sheet identification device that can easily detect the glossiness of a wide range of paper sheets.

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 detects the glossiness of the front surface or the back surface of a paper sheet to detect the authenticity of the paper sheet. And a light beam generating means for generating a light beam, and irradiating the generated light beam while scanning the front or back surface of the paper sheet via a galvanomirror. A light receiving means for receiving the reflected light reflected from the front or back surface of the paper through the galvanomirror, and a glossiness for detecting the glossiness of the front or back surface of the paper based on the received reflected light Detection means, collation means for collating the detected glossiness with a glossiness based on a genuine paper sheet stored in advance, and the paper put into the main body of the paper sheet identification device when the collation coincides The leaf is identified as authentic and the paper is not matched. It is characterized by having identifying means for identifying kind illegal.
The paper sheet identification apparatus according to claim 2 of the present invention is characterized in that the light beam generated by the light beam generation means is beam light.
The paper sheet identification apparatus according to claim 3 of the present invention is characterized in that the scanning of the light beam by the irradiation light receiving means scans a predetermined portion of the front surface or the back surface of the paper sheet.
The paper sheet identification apparatus according to claim 4 of the present invention is characterized in that the scanning of the light beam by the irradiation light receiving means scans a predetermined range of the front surface or the back surface of the paper sheet.
The paper sheet identification device according to claim 5 of the present invention is characterized in that it is provided with a type input direction discriminating means for discriminating the type and input direction of the paper sheet input to the main body of the paper sheet identification device. It is said.
In the paper sheet identification apparatus according to claim 6 of the present invention, the determination by the type input direction determination means reads magnetic data recorded on a paper sheet input to a main body of the paper sheet identification apparatus. Or the paper sheet is optically read.
The paper sheet identification apparatus according to claim 7 of the present invention is characterized in that the processing by the irradiation light receiving means is performed during the conveyance of the paper sheet put into the main body of the paper sheet identification apparatus. .

The paper sheet identification device according to claim 1 of the present invention irradiates the light beam generating means for generating a light beam and irradiating the generated light beam while scanning the front or back surface of the paper sheet via a galvano mirror, Irradiation light receiving means for receiving the reflected light reflected from the front or back surface of the paper sheet via the galvano mirror, and the glossiness of the front or back surface of the paper sheet is detected based on the received reflected light. Glossiness detection means for checking, a matching means for comparing the detected glossiness with a glossiness based on a genuine paper sheet stored in advance, and input to the main body of the paper sheet identification device when matching Since the paper sheet is identified as authentic and has an identifying means for identifying the paper sheet as illegal when the collation does not match, the galvano mirror can easily receive the specular reflection light and the irregular reflection light. Easy and efficient Detection processing of Ku gloss can be performed.
In the paper sheet identification apparatus according to the second aspect of the present invention, since the light beam generated by the light beam generation means is beam light, it can be a light beam with excellent straightness.
In the paper sheet identification device according to claim 3 of the present invention, since the scanning of the light beam by the irradiation light receiving means scans a predetermined portion of the front or back surface of the paper sheet, the glossiness of the paper sheet can be easily adjusted. Can be detected.
In the paper sheet identification apparatus according to claim 4 of the present invention, the scanning of the light beam by the irradiation light receiving means scans a predetermined range of the front surface or the back surface of the paper sheet. Glossiness can be detected and identification accuracy can be improved.
Since the paper sheet identification apparatus according to claim 5 of the present invention is provided with the type input direction determining means for determining the type and input direction of the paper sheets input to the main body of the paper sheet identification apparatus, It is possible to efficiently perform the identification process by specifying the type and direction of the paper sheets input to the main body of the leaf identification apparatus.
In the paper sheet identification apparatus according to claim 6 of the present invention, the determination by the type input direction determination means reads magnetic data recorded on a paper sheet input to a main body of the paper sheet identification apparatus. Or by optically reading the paper sheet, it is possible to easily realize the type loading direction discriminating means, and also to read the authenticity of the paper sheet by reading magnetic data or optically. Identification can be made.
In the paper sheet identification apparatus according to claim 7 of the present invention, since the processing by the irradiation light receiving means is performed during the conveyance of the paper sheet put into the main body of the paper sheet identification apparatus, the paper sheet identification is performed. Processing time can be shortened.

  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 example shown in the figure, the magnetic heads 4a and 4b are provided so as to face each other. You may make it press on head 4a, 4b, respectively.

  In FIG. 1, reference numeral 5 denotes an irradiator that irradiates a laser beam (laser beam), and reference numeral 6 denotes a light receiver. Among these, the irradiator 5 is a known laser beam generator. The generated laser beam can be irradiated toward the mirror M of the galvano mirror 7 provided at a predetermined position above the conveyance path 3. The galvanometer mirror 7 will be described later. The light receiver 6 includes a known photoelectric element, and is configured to detect the intensity of the light beam irradiated from the galvanometer mirror 7 by the electric power induced when the light beam is received.

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 the applied current and magnetic field is employed.

  As described above, the mirror M of the galvanometer mirror 7 can be rotated about the X axis and the Y axis, so that the laser beam emitted from the irradiator 5 is a paper sheet as shown in FIG. It is possible to scan a predetermined distance along the conveyance direction a, and to move in a direction orthogonal to the conveyance direction (width direction of the paper sheet a). In the example of FIG. 3, the laser beam is moved in the width direction while scanning in the conveyance direction of the paper sheet a. However, the laser beam is moved in the conveyance direction while scanning in the width direction of the paper sheet a. Thus, the detection range of the glossiness of the paper sheet a may be determined.

  The determination of the glossiness detection range can be easily determined by the galvanometer mirror 7 by stopping the conveyance of the paper sheet a, that is, stopping the conveyance of the paper sheet a at a predetermined position. In order to shorten the time, the glossiness within a predetermined range is detected while the paper sheet a is being conveyed. For this reason, the conveyance position of the paper sheet a is always grasped based on the number of pulses of a driving motor including a pulse motor (not shown) of the conveyance path 3.

  Since the mirror M of the galvanometer mirror 7 is rotated, the laser beam emitted from the irradiator 5 can be swung at a predetermined angle (see the arrow A in FIG. 1 and the arrow in FIG. 3). Includes a portion where the incident angle and the reflection angle with respect to the paper sheet a are equal, and at that time, the light receiver 6 can receive the specularly reflected light, and receives the irregularly reflected light at other portions than that portion. It has the feature that can be.

  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 comprehensively controls the apparatus main body 1 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 drive circuit (not shown) of the irradiator 5, the irradiation / reception unit 15 including the light receiver 6 and its processing circuit (not shown), and the transport path 3 are driven. A conveyance unit 16 including a motor (pulse motor) and a drive circuit (not shown) thereof is connected. 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. 6A) and the back surface (see FIG. 6B) 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 or not the sheet a has been inserted into the insertion slot 2 with the front side up or the back side up (S104). 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. 5, when 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 genuine paper sheet. If 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 is reversely conveyed on the conveyance path 3 (conveyed in the direction opposite to the arrow of the conveyance path 3 in FIG. 1). It is discharged to 2 and returned. Thus, when the determination of the input surface of the paper sheet a to the input port 2 is performed using the magnetic heads 4a and 4b, there is a feature that it can be easily determined.

  When the paper sheet a that has been input to the input port 2 is input with its surface facing up, the galvanometer mirror 7 causes the laser beam to enter a predetermined inspection range on the surface of the paper sheet a shown in FIG. Are adjusted so as to be scanned, and the intensity of the specularly reflected light and irregularly reflected light is detected by the light receiver 6, and the paper sheet a thrown into the slot 2 is thrown with the back side up. In this case, the galvanometer mirror 7 is adjusted and irradiated so that the laser beam scans a predetermined inspection range on the surface of the paper sheet a shown in FIG. Then, the intensity of the irregularly reflected light is detected (S106). Then, the control unit 12 calculates the glossiness of the paper sheet a based on the regular reflection light and the irregular reflection light obtained from the light receiver 6. That is, this glossiness detection principle is performed by viewing the same place multiple times at different incident angles by the galvanometer mirror 7.

  Since the storage unit 11 stores in advance glossiness data in a predetermined inspection range on the front and back surfaces of genuine paper sheets (see the storage unit 11 in FIG. 4), the stored data and The authenticity of the paper sheet a is identified (differentiated) by collating with the data read through the light receiver 6 this time (S108).

  The above-described identification process is performed while the paper sheet a is transported through the transport path 3, and when the paper sheet a is determined to be genuine (sure ticket) (Yes in S110), the transport of the transport path 3 is performed. It is continued as it is (see the arrow of the conveyance path 3 in FIG. 1) and stored in a storage safe (not shown) (Yes at S112 and S114). In the case where the apparatus body 1 is a single device that merely 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 the paper sheet a is determined to be fraudulent (counterfeit) (No at S110), the transport path 3 is reversely transported, and the paper sheet a is discharged to the input port 2 and returned (S116).

  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 glossiness of the paper sheet a can be detected by irradiating with a laser beam via, it can be performed in a short time and efficiently. Moreover, since the light beam is a laser beam, it has a feature that the glossiness can be detected with high accuracy.

  In the above-described example, the irradiation light receiving means including the irradiator 5, the light receiver 6, and the galvanometer mirror 7 is provided on one side (upper side in the example of FIG. 1) with the conveyance path 3 interposed therebetween. 3 may be provided on both sides of the sheet 3 to detect the glossiness of the front side and the back side of the paper sheet a. In the above example, the glossiness is detected using the predetermined range of the paper sheet a as a detection range. However, the glossiness may be detected by scanning one line. In the case of detection using such a line, the detection time can be shortened. However, when a predetermined range is detected as described above, detection with higher accuracy can be performed. Furthermore, in the above-described example, the glossiness is detected using both the regular reflection light and the irregular reflection light, but may be detected using either one.

  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 explanatory drawing which shows the scanning state of a laser beam. 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. (A) is a front view of paper sheets, (b) is a back view of paper sheets.

Explanation of symbols

a paper sheet M mirror P plate 1 apparatus main body 2 slot 3 transport path 4a, 4b magnetic head 5 irradiator 6 light receiver 7 galvano mirror 10 controller 11 storage unit 12 control unit 13 magnetic head unit 14 galvano mirror unit 15 irradiation Receiver unit

Claims (7)

A paper sheet identification device for detecting the glossiness of the front or back surface of a paper sheet and identifying the authenticity of the paper sheet,
Light ray generating means for generating light rays;
The generated light beam is irradiated while scanning the front or back surface of the paper sheet via the galvano mirror, and the reflected light reflected from the front or back surface of the paper sheet is received via the galvano mirror. Irradiation light receiving means;
Glossiness detecting means for detecting the glossiness of the front or back surface of the paper sheet based on the received reflected light; and
Collating means for collating the detected glossiness with the glossiness based on a genuine paper sheet stored 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 identifying apparatus according to claim 1, wherein the light beam generated by the light beam generating means is a beam light. 3. The paper sheet identification apparatus according to claim 1, wherein the scanning of the light beam by the irradiation light receiving means scans a predetermined portion of the front surface or the back surface of the paper sheet. Kind identification device. 3. The paper sheet identification apparatus according to claim 1, wherein the scanning of the light beam by the irradiation light receiving means scans a predetermined range of the front surface or the back surface of the paper sheet. Kind identification device. 5. The paper sheet identification apparatus according to claim 1, further comprising a type insertion direction determination unit configured to determine a type and input direction of a paper sheet input to a main body of the paper sheet identification apparatus. Paper sheet identification device characterized by this. 6. The paper sheet identifying apparatus according to claim 5, wherein the determination by the type input direction determining means is performed by reading magnetic data recorded on a paper sheet input to a main body of the paper sheet identifying apparatus, or A paper sheet identification apparatus characterized by optically reading the paper sheet. 7. The paper sheet identification apparatus according to claim 1, wherein the processing by the irradiation light receiving unit is performed during conveyance of the paper sheet that has been put into a main body of the paper sheet identification apparatus. Paper sheet identification device.

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