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Method for confirming authenticity of sheet

A method of judging and banknote technology, which is applied in the inspection of the authenticity of banknotes, handling coins or valuable banknotes, instruments, etc., and can solve the problems of making counterfeit banknotes, etc.

Inactive Publication Date: 2004-03-31
SANYO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, although this method uses two sensors, since the authenticity judgment is performed by simply judging whether the difference or ratio of the measurement levels of the two sensors is within a specified range, if it is determined that the two sensors are Counterfeit banknotes can be easily produced by obtaining data from these sensors that are judged to be genuine by any sensor
That is, there is a problem that forgery is easy

Method used

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  • Method for confirming authenticity of sheet
  • Method for confirming authenticity of sheet
  • Method for confirming authenticity of sheet

Examples

Experimental program
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Embodiment Construction

[0023] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0024] (1) Description of the first embodiment

[0025] (1-1) Explanation of sensor for reading banknote characteristic quantity

[0026] figure 1 A sensor for reading characteristic quantities of banknotes is shown.

[0027] Put the banknote 1 into the measuring device not shown in the figure and move it in the direction of the arrow. A light transmission sensor 11 and a magnetic sensor 12 are provided as sensors for reading feature quantities of the banknote 1 .

[0028] The light transmittance sensor 11 detects the light transmittance at several feature value reading positions on the central line L of the banknote 1 . The magnetic sensor 12 detects the strength of the magnetic field at several reading positions of the characteristic data on the central line L of the banknote 1 .

[0029] (1-2) Explanation of preprocessing

[0030] In order to determine the auth...

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PUM

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Abstract

Features at predetermined inspection portions of authentic sheets prepared in advance are measured by means of sensors. The main components are analyzed based on the results of the measurement to determine an equation of a straight line concerning a predetermined main component. Reference data including values concerning the predetermined main component at the predetermined inspection portions is created from the equation. Features at predetermined inspection portions of sheets under inspection are measured by means of sensors. Inspection data including values concerning the predetermined main component at the inspection portions is created from the results of the measurement and the equation of the straight line. The inspection data is compared with the reference data to confirm the authenticity of the sheets under inspection.

Description

technical field [0001] The invention relates to a method for judging the authenticity of banknotes such as banknotes and securities. Background technique [0002] Known methods of authenticity determination of banknotes are measurement data obtained from banknotes to be inspected using a single sensor such as a magnetic sensor and comparison with previously created reference data to determine the authenticity of banknotes to be inspected. (Refer to the Japanese Patent Publication No. 60-215293). [0003] However, in this method, since only the data measured by a single sensor is used to determine the authenticity, if it is known what kind of sensor is used, then it can be easily obtained as the data determined as a genuine bill in this sensor. Manufacture counterfeit banknotes. That is, there is a problem that forgery is easy. [0004] Therefore, it was invented to judge the authenticity of banknotes using two types of sensors. (JP-A-51-90890, JP-A-51-90891). That is, u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G07D7/00
CPCG07D7/12G07D7/00
Inventor 阪井英隆田边义宪
Owner SANYO ELECTRIC CO LTD