JP2000067298A - Truth/false discriminating device for paper sheets - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make elements constituting of a true paper money an object of check as many as possible, to more improve the accuracy of authenticity discrim ination and further to suppress the price of a discriminating device. SOLUTION: Concerning this discriminating device, work for comparing the feature data of paper sheets inserted from an inserting port with previously stored true data is performed while exchanging light with electric signals. In this case, as light to irradiate the paper sheets to be conveyed, plural of visible light and invisible light are used, and elements for generating the visible light and invisible light and light receiving elements corresponding to the respective light emitting elements are longitudinally arranged along with the conveying direction of paper sheets. The paper sheets are paper moneys, watermark, embossed part and edge part of picture pattern print are checked at least by the invisible light, the quantity of contained ink and color are checked at least by the visible light and the checks are performed by watching a level difference through a synthetic waveform.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for judging the authenticity of paper sheets, mainly bills.

[0002]

BACKGROUND OF THE INVENTION In recent years, machines that automatically process bills and supply goods, such as vending machines, automatic lending machines, and currency exchange machines, have become widespread. These devices are provided with a judging device for comparing the authenticity and denomination of a bill to be used with authenticity data stored in advance and checking.

Conventionally, this judging device has been used to check the magnetism distributed in a banknote. However, forgery can be easily performed only by checking the magnetic distribution. Is transmitted or reflected, and the signal carried on the light (electromagnetic wave) is converted into an electric signal,
What is compared with genuine data has become mainstream.

[0004]

However, at present, due to the printing technique and the high precision of the color copier, etc., many counterfeit bills that clear the check factors of the bill discriminating apparatus have been circulating.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides the above-mentioned conventional situation
It is a new method that focuses on the problems and makes it possible to check as much as possible many elements that make up a genuine banknote, further improve the accuracy of authenticity judgment, and reduce the price of the judgment device. It is an object of the present invention to provide an authentication device for paper sheets.

[0006]

In order to achieve the above object, an apparatus for judging the authenticity of a paper sheet according to the present invention is characterized in that characteristic data of a paper sheet inserted from an insertion slot is compared with authenticity data stored in advance and authenticity data. An authenticity determination device for paper sheets, which performs comparison work by exchanging electric signals with light as a medium, characterized in that the light irradiated on the conveyed paper sheets is a plurality of types of visible light and invisible light. The above-mentioned visible light and invisible light generating elements, and the light receiving elements corresponding to the respective light emitting elements are arranged in tandem along the transport direction of the paper sheets, and the paper sheets are bills. Characterized in that, by invisible light, watermark, embossing, at least checking the edge part deviated from the pattern printing, characterized by at least checking the ink content, color printed by visible light, The check is characterized Nasukoto by looking at the level difference by the composite waveform.

[0007]

According to the above-mentioned structure, in addition to the commonly used detection element using invisible light, it is possible to precisely check a color element, in particular, with visible light. The accuracy of the authenticity determination can be improved, and the cost of the determination device can be reduced as compared with a conventional case where a plurality of photoelectric elements using invisible light are provided.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be specifically described for a bill.

The outline of the transport type bill authenticity judging device is as follows. When the end of the bill is inserted into the insertion slot, the photoelectric switch is turned on, and the bill carrying mechanism is activated. This carry-in mechanism mainly includes a roller group that catches the end of the inserted bill and feeds the belt, and a belt that guides the carry-in direction of the bill, thereby forming a carry path.

[0010] A determination sensor comprising a light emitting element and a light receiving element corresponding to the light emitting element is provided in the above-mentioned carriageway. The light emitting element emits light having a wavelength suitable for the purpose of checking, and scanning of the check element of the bill being conveyed (running) is detected in a linear manner. Are supported in one version.

In this embodiment, the wavelength is 400 to
The light emitting element and the light receiving element of the visible light from purple to red which are in the range of 760 nm and the invisible light outside the above range, mainly the ultraviolet light of 380 nm or less, or the light emitting element of the infrared ray and the light receiving element are arranged along the bill conveying direction. Deployed in tandem. The order of this deployment does not matter.

Here, depending on the invisible light, a watermark present on a genuine bill, an emboss for money identification for a visually impaired person,
Then, an operation of detecting an edge portion, a character, or the like deviating from the pattern printing is performed, and the detection signal is converted into an electric signal by a light receiving element and sent to a determination circuit. The presence or absence of the fluorescent paint is checked by ultraviolet rays.

In addition, the color reaction is checked by the above-mentioned visible light, and this check basically indicates the ink content used. As in the case of the invisible light, the detection signal is converted into an electric signal by the light receiving element. This is sent to the discrimination circuit.

The detection signals of the invisible light and the visible light are respectively converted into electric signals and sent to the discrimination circuit. Both of them are compared with the genuine data as a composite waveform, and the difference between the levels is used as a basis for discrimination. It is assumed that.

[0015]

According to the present invention, the apparatus for judging the authenticity of a paper sheet is constituted as described above. For this reason, comparison elements that are difficult to check only with conventional invisible light are covered with visible light, and the number of objects to be checked is increased, so that the accuracy of authenticity judgment is further improved, and the price is lower than before. And supply to consumers.

Claims (6)

[Claims] 1. An authenticity determining apparatus for a sheet which performs a task of comparing characteristic data of the sheet inserted from the insertion slot with authenticity data stored in advance by exchanging the signal with an electric signal through light. An authenticity judging device for a paper sheet, characterized in that light to be irradiated on the paper sheet is selected from a plurality of types of visible light and invisible light. 2. The light emitting device according to claim 1, wherein the visible light and invisible light generating elements and the light receiving elements corresponding to the respective light emitting elements are arranged in tandem along the paper sheet transport direction. Authentication device for paper sheets. 3. The apparatus according to claim 1, wherein the paper sheet is a bill. 4. The apparatus for judging authenticity of a paper sheet according to claim 3, wherein at least an edge portion deviated from a watermark, emboss, and pattern printing is checked by invisible light. 5. The method according to claim 3, wherein at least the content and color of the ink printed by visible light are checked.
2. The authenticity determination device for paper sheets according to claim 1. 6. The method according to claim 4, wherein the checking is performed by observing a level difference based on a composite waveform.
Or the authenticity judging device for paper sheets according to claim 5.