paper identification device

Abstract

Provided is a paper item identification device that if a foreign object has been recognized, is capable of assessing the authenticity of a paper item at a constant precision, regardless of the existence of said foreign object. Said paper item identification device assesses the authenticity of the paper item, and is provided with: a sensor that detects a characteristic of the paper item; a storage section that stores an assessment threshold value for assessing the authenticity of the paper item; a correction section that corrects the output of the sensor so that the output value is constant; an identification control section that if a present correction quantity for the sensor output has radically changed from a past correction quantity, changes the assessment threshold value in accordance with the changed correction quantity; and an authenticity assessment section that, using the changed assessment threshold value from the identification control section, assesses the authenticity of the paper item.

Description

technical field [0001] The present invention relates to a paper identification device for judging the authenticity of paper represented by banknotes, securities, and cash coupons. Background technique [0002] Generally, a cash transaction device such as an ATM (Automatic Tellers Machine) that handles printed matter such as banknotes and securities or a window device installed at a window of a financial institution is equipped with an identification device that has a function for identifying banknotes, The identification function of judging the authenticity of securities. [0003] For example, in banknote recognition at an ATM, single or multiple sensors included in the recognition device scan banknotes conveyed in a predetermined direction, and the recognition device reads characteristic data representing printed patterns of the banknotes. Then, the recognition device performs predetermined computation on the characteristic data located in the desired region of the banknot...

AI Technical Summary

Problems solved by technology

However, when a foreign object such as dust or dust is present at the time of calibration, the correction is performed taking into account the influence of the foreign object, and then when the foreign object present at the time of calibration disappears, the output of the sensor may become an unexpected value. It will deviate from the threshold value at the time of judgment, resulting in wrong judgment

That is to say, there is a problem that when there is a foreign object such as garbage or dust, the output of the sensor is corrected according to the situation, but when the foreign object disappears later, the output of the sensor remains in the state at the time of correction, So the output of the sensor is not constant, leading to wrong judgment

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