JPS61118891A - Sheet paper discrimination - Google Patents

Sheet paper discrimination

Info

Publication number
JPS61118891A
JPS61118891A JP59239375A JP23937584A JPS61118891A JP S61118891 A JPS61118891 A JP S61118891A JP 59239375 A JP59239375 A JP 59239375A JP 23937584 A JP23937584 A JP 23937584A JP S61118891 A JPS61118891 A JP S61118891A
Authority
JP
Japan
Prior art keywords
value
light
paper sheet
discrimination
banknote
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP59239375A
Other languages
Japanese (ja)
Other versions
JPH0648511B2 (en
Inventor
鎌上 信也
林 逸夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP59239375A priority Critical patent/JPH0648511B2/en
Publication of JPS61118891A publication Critical patent/JPS61118891A/en
Publication of JPH0648511B2 publication Critical patent/JPH0648511B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Inspection Of Paper Currency And Valuable Securities (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は1紙葉類鑑別方法に関し、更に詳細には紙葉
類例えば紙幣の反射光あるいは透過光を利用することに
より紙幣の金種及び真偽を判定する紙葉類鑑別方法に関
する。
Detailed Description of the Invention (Industrial Field of Application) The present invention relates to a method for identifying paper sheets, and more specifically to a method for identifying paper sheets, such as banknotes, by using reflected light or transmitted light from the banknotes. This invention relates to a paper leaf identification method for determining authenticity.

(従来の技術) 従来の紙葉類鑑別方法では、ランプや発光ダイオード等
の光源により紙幣に光を照射し1紙幣からの反射光や紙
幣を通る透過光により紙幣の金種及び真偽の判定を行っ
ていた。詳述すると、先ずランプや発光ダイオード等の
光源により紙幣に光を照射してその反射光もしくは透過
光を受光素子により光電変換し、光電変換した電気信号
は増幅器を介して最適値まで増幅する。この増幅した電
気信号の波形の一例を第4図に示す、ここで、同図にお
ける横軸は紙幣を走査していく時間軸であり、一方縦軸
は受光素子により得られ増幅された電気量(光量)であ
る、尚、紙幣より得られた電気信号は紙幣走行と同期し
たサンプリングタイミング毎にA/D変換器を介してデ
ィジタル変換される、このディジタル値は常に固定基準
電圧値から絶対量として算出される。第4図において、
固定基準電圧値をvoとし、サンプリングタイミングt
=iの時のディシルタル変検出力電圧値はAtとする。
(Prior art) In the conventional paper sheet identification method, a light source such as a lamp or a light emitting diode is used to irradiate the banknote with light, and the denomination and authenticity of the banknote are determined based on the reflected light from each banknote or the transmitted light that passes through the banknote. was going on. To be more specific, first, a bill is irradiated with light from a light source such as a lamp or a light emitting diode, and the reflected or transmitted light is photoelectrically converted by a light receiving element, and the photoelectrically converted electrical signal is amplified to an optimal value via an amplifier. An example of the waveform of this amplified electric signal is shown in FIG. 4, where the horizontal axis in the figure is the time axis of scanning the banknote, and the vertical axis is the amount of electricity obtained and amplified by the light receiving element. The electrical signal obtained from the banknote is converted into a digital signal via an A/D converter at each sampling timing synchronized with the banknote travel.This digital value is always converted from a fixed reference voltage value to an absolute value. It is calculated as In Figure 4,
The fixed reference voltage value is vo, and the sampling timing is t.
The digital change detection force voltage value when =i is assumed to be At.

また、ディジタル変換出力電圧値Atにおいて1紙幣走
査線止金体(サンプリングタイミングt=l〜n)にお
ける加算演算処理を行ないつまり加算計数し、その結果
をA/’gとすると、 となる、言い換えれば、A′oは固定基準電圧値■oか
らの電気信号出力における紙幣の走査線上全体(サンプ
リングタイミングt=i〜n)の積分値である。この積
分値A/口と予め上記同様の方法により正常な紙幣につ
いて行なって得られる判別基準値A「とを比較すること
により紙幣の金種及び真偽の判別を行なっていた。しか
し、上記の方法では、受光素子からの電気信号が同−金
種及び同一走査点による場合でも紙幣の流通後の汚れ及
び発光源の光量低下等により変動するという問題点を残
していた。
Also, if the digital conversion output voltage value At is subjected to addition calculation processing at one banknote scanning line clasp (sampling timing t=l~n), that is, addition is counted, and the result is A/'g, then For example, A'o is the integral value over the entire scanning line of the banknote (sampling timing t=i to n) in the electrical signal output from the fixed reference voltage value (i)o. The denomination and authenticity of the banknotes were determined by comparing this integrated value A/mouth with the discrimination standard value A' obtained by performing the same method on normal banknotes in advance. This method still has the problem that even when the electrical signals from the light receiving elements are of the same denomination and the same scanning point, they fluctuate due to dirt after circulation of banknotes and a decrease in the light intensity of the light emitting source.

そこで、前記判別基準値Arは前記変動分を加味しであ
る程度の許容範囲αをもたしていた0例えば、金種別に
判別基準値Arが異なるように受光素子を配置し、上記
同様に積分値A6を未知の紙幣の積分値としてかつAr
−α<A’(1<Ar+αが判別基準値Arに対して成
立もしくは不成立により紙幣を判別していた。
Therefore, the discrimination reference value Ar has a certain tolerance range α by taking into account the variation. Let the value A6 be the integral value of the unknown banknote and Ar
Banknotes were discriminated based on whether -α<A'(1<Ar+α was established or not with respect to the discrimination reference value Ar.

(発明が解決しようとする問題点) しかしながら、近年複写技術及び印刷技術の進歩辷伴な
って精巧な偽造紙幣を容易に作成することが可能となっ
てきた。よって、上記従来の方法において、許容範囲α
が大きい場合、真券の認識率は高いが複写等による偽造
紙幣に対してもあたかも真券の如き誤認識する確率も高
くなり、逆に許容範囲がαが小さい場合、偽造紙幣に対
する誤認識はなくなるが真券にもかかわらず偽券と認識
する確率が高くなる。したがって、真券の高認識率を確
保し、かつ偽券を確実に排除するために相反する上記双
方の問題に鑑みて許容範囲αの最適値を決定することは
限界があるという問題点があった。
(Problems to be Solved by the Invention) However, with advances in copying technology and printing technology in recent years, it has become possible to easily create sophisticated counterfeit banknotes. Therefore, in the above conventional method, the allowable range α
When α is large, the recognition rate for genuine bills is high, but there is also a high probability that counterfeit bills made by copying etc. will be erroneously recognized as if they were genuine bills.On the other hand, if the tolerance range is small, the erroneous recognition of counterfeit bills will be low. However, there is a high probability that the note will be recognized as counterfeit even though it is genuine. Therefore, there is a problem in that there is a limit to determining the optimal value of the allowable range α in view of the above-mentioned conflicting issues in order to ensure a high recognition rate of genuine notes and to reliably eliminate counterfeit notes. Ta.

この発明は、これらの問題点を解決するためのもので、
上記判別基準値の許容範囲を小さくして偽造紙幣を確実
に排除し、かつ安定な真券の鑑別を行なう紙葉類鑑別1
法を提供することを目的とする。
This invention is intended to solve these problems.
Paper sheet discrimination 1 that reliably excludes counterfeit banknotes by reducing the allowable range of the above-mentioned discrimination reference value and performs stable discrimination of genuine banknotes.
The purpose is to provide law.

(問題点を解決するための手段) この発明は、前記問題点を解決するために紙葉類に発光
源より光照射して走査し、得られる反射光あるいは透過
光を受光素子により電気信号に光電変換し、紙葉類の走
行と同期した基準タイミングにより光電変換出力をサン
プリングした値と基準値との差を累積加算して積分値を
求め、この積分値と予められる判別基準値とを比較し、
比較した結果によって紙葉類の種類及び真偽を判定する
紙葉類鑑別方法において1紙葉類の各走査線上の電気信
号の最小値及び最大値を検出し、この最小値を基準値に
設定したときの積分値を算出し、最小値と最大値の電位
差に対するこの積分値の比率を前記判別基準値と比較す
る。
(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention aims to scan paper sheets by irradiating them with light from a light emitting source, and converting the resulting reflected or transmitted light into electrical signals using a light-receiving element. After performing photoelectric conversion, the difference between the photoelectric conversion output sampled at a reference timing synchronized with the running of paper sheets and the reference value is cumulatively added to obtain an integral value, and this integral value is compared with a predetermined discrimination reference value. death,
In a paper sheet identification method that determines the type and authenticity of paper sheets based on the comparison results, the minimum and maximum values of electrical signals on each scanning line of one sheet are detected, and this minimum value is set as the reference value. An integral value at this time is calculated, and the ratio of this integral value to the potential difference between the minimum value and the maximum value is compared with the discrimination reference value.

(作用) この発明は以上のように紙幣等の走査線上で得られる反
射光あるいは五過光をt4A信号に変換し、この電気信
号の最小値を積分値算出の基進値に設定し、さらに前記
走査線上で得られた信号の最小値と最大値の電位差によ
り出力波形の正規化を行なって紙葉類の種類及び真偽の
判別を行なう。
(Function) As described above, this invention converts the reflected light or the five-pass light obtained on the scanning line of a banknote, etc. into a t4A signal, sets the minimum value of this electric signal as the basic value for calculating the integral value, and further The output waveform is normalized based on the potential difference between the minimum value and the maximum value of the signal obtained on the scanning line, and the type and authenticity of the paper sheet are determined.

したがって、この発明は紙葉類例えば紙幣の汚れや発光
源の光量低下等の影響を受けずかつ判別基準値の許容範
囲を小さく設定することが可能となり偽造紙幣等を確実
に排除し、かつ安定な真券の鑑別を行なうことができる
紙葉類鑑別方法を提供できる。
Therefore, the present invention is not affected by dirt on paper sheets, such as banknotes, or a decrease in the light intensity of the light emitting source, and it is possible to set the permissible range of the discrimination reference value small, thereby reliably eliminating counterfeit banknotes, etc., and stabilizing the It is possible to provide a paper sheet discrimination method that can discriminate genuine bills.

(実施例) 第1図は、この発明の一実施例を示すブロック図である
。1は受光素子で、光源(図示せず)により紙幣(図示
せず)に光を照射して得た反射光もしくは透過光を光電
変換する。2は増幅器で、受光素子lで光電変換した電
気信号を最適値まで増幅する。3はA/D変換器で、増
幅器2により増幅された電気信号(アナログ信号)をデ
ィジタル信号に変換する。4はバッファで、A/D変換
器3よりのディジタル信号を一時格納して後述する中央
演算処理装置5の指示により出力する。5は中央演算処
理装置で、バッファ4を介したディジタル信号を各走査
線毎に後述する記憶回路6に記憶するように指示及び後
述する判別基準値記憶装置7からの判別基準値と記憶回
路6に格納したディジタル信号との比較判定を行なう、
6は記憶回路で、バッファ4を介して得られる゛ディジ
タル信号を各走査線毎に記憶する。7は判別基準値記憶
回路で、中央演算処理装R5にて比較判定を行なうとき
の判別基準値を記憶する。ここで、同図のように受光素
子1からバッファ4までの接続間係は複数の各受光素子
毎に設けられている。
(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention. Reference numeral 1 denotes a light receiving element that photoelectrically converts reflected or transmitted light obtained by irradiating light onto a banknote (not shown) from a light source (not shown). Reference numeral 2 denotes an amplifier that amplifies the electrical signal photoelectrically converted by the light receiving element 1 to an optimum value. 3 is an A/D converter which converts the electric signal (analog signal) amplified by the amplifier 2 into a digital signal. A buffer 4 temporarily stores the digital signal from the A/D converter 3 and outputs it according to instructions from a central processing unit 5, which will be described later. Reference numeral 5 denotes a central processing unit which instructs a storage circuit 6 (to be described later) to store the digital signal passed through the buffer 4 for each scanning line, and outputs a discrimination reference value from a discrimination reference value storage device 7 (to be described later) and the memory circuit 6. Compare and judge digital signals stored in
A storage circuit 6 stores the digital signal obtained via the buffer 4 for each scanning line. Reference numeral 7 denotes a discrimination reference value storage circuit which stores discrimination reference values used when comparison and judgment are performed in the central processing unit R5. Here, as shown in the figure, a connection from the light receiving element 1 to the buffer 4 is provided for each of the plurality of light receiving elements.

次に、動作について説明する。Next, the operation will be explained.

先ず、図示しない光源より発せられた光は紙幣に照射さ
れ1紙幣により反射した反射光あるいは紙幣を通過した
透過光は受光素子1により受は取られる。以下、紙幣に
おける反射光についてのみ述べることにする。前記受光
素子1により受は取られた光は、!気信号に光電変換さ
れ、増幅器2により最適値まで増幅される。#!幅器2
の出力波形を第2図に示す、増幅されたアナログ信号は
紙幣走行と同期したタイミング毎にA/D変換器3によ
りディジタル信号に変換され、バッファ4に取り込まれ
る。この取り込まれた値Atは中央演算処理装置5によ
り各走査線毎に記憶回路6に記憶される。さらに2紙幣
が受光素子lを通過後。
First, light emitted from a light source (not shown) is irradiated onto a banknote, and the reflected light reflected by one banknote or the transmitted light that has passed through the banknote is received by the light receiving element 1. Hereinafter, only the reflected light on banknotes will be described. The light received by the light receiving element 1 is! The signal is photoelectrically converted into an optical signal, and amplified by an amplifier 2 to an optimum value. #! width gauge 2
The amplified analog signal, the output waveform of which is shown in FIG. 2, is converted into a digital signal by the A/D converter 3 at every timing synchronized with the running of the bill, and is taken into the buffer 4. This fetched value At is stored by the central processing unit 5 in the storage circuit 6 for each scanning line. After two more banknotes pass through the light receiving element l.

中央演算処理装置5により各走査線上における最大値A
maxと最小値A■inを算出し、次に走査線上の最小
値Am1nを判別基準値として走査線上全体にわたり出
力波形を積分する。この積分値は、Σ(A i −Am
1n )となる、さらに、前記積分値;雲り を出力波形の最大値Amaxと最小値Am1nの電位差
すなわち絶対最大変化量(Amax −Am1n )で
除算し正規化し、この演算結果をAoとすると、Ao 
は。
The central processing unit 5 calculates the maximum value A on each scanning line.
max and the minimum value A.sub.in are calculated, and then the output waveform is integrated over the entire scanning line using the minimum value Am1n on the scanning line as a determination reference value. This integral value is Σ(A i −Am
1n), and then normalize the integrated value; cloud by dividing it by the potential difference between the maximum value Amax and the minimum value Am1n of the output waveform, that is, the absolute maximum amount of change (Amax - Am1n), and let this calculation result be Ao, Ao
teeth.

となる、この算出された値Aoは判別基準値記憶回路7
に記憶している判別基準値Arと比較判定される。
This calculated value Ao is stored in the discrimination reference value storage circuit 7.
It is compared with the discrimination reference value Ar stored in .

纂2図は、第1図での増幅器2の出力波形を示す図であ
る。同図における横軸は紙幣を走査していく時間軸で、
逆に縦軸は受光素子1により得られた電気量(光量)で
ある、同図において、8−1は布中に流通していない完
封券の出力波形で8−2は長期間布中で流通した流通紙
幣の同一金種、同一走査線上の出力波形を示す、ここで
、流通紙幣における汚れは紙幣全体にほぼ均一に汚れる
のが一般的である。その場合の出力電圧は紙幣の印刷の
ない部分を完封券と同一位置で比較した場合差異が大き
く、さらに紙幣の黒色に印刷している部分を完封券と同
一位置で比較した場合紙幣のインクによる光の吸収度が
大きいので、汚れによる反射光におけるものと完封券と
の差異はほとんど認められない0反射光に対する汚れの
影響は、紙幣の濃淡に比例して流通紙幣の出力波形8−
2を前述の演算方法により積分するが、流通紙幣が受光
素子1七通過後、中央償箕処理装置5により各走査線上
における最大!IBla!と最小値B sinを算出し
て正規化を行なう、この演算結果を3口とすると、BO
は となり、Ao =B口の関係が成り立つ。
FIG. 2 is a diagram showing the output waveform of the amplifier 2 in FIG. 1. The horizontal axis in the figure is the time axis of scanning the banknotes,
Conversely, the vertical axis is the amount of electricity (light amount) obtained by the light receiving element 1. In the figure, 8-1 is the output waveform of a sealed ticket that has not been distributed in the cloth, and 8-2 is the output waveform of a sealed ticket that has not been distributed in the cloth for a long time. The output waveforms of the same denomination and the same scanning line of the circulated banknotes are shown. Here, the dirt on the banknotes in circulation is generally almost uniform throughout the banknote. In that case, there is a large difference in the output voltage when comparing the unprinted part of the banknote at the same position as the complete ticket, and furthermore, when comparing the black printed part of the banknote at the same position as the complete ticket, there is a large difference in the output voltage due to the ink on the banknote. Since the degree of light absorption is large, there is almost no difference between the reflected light due to dirt and a fully sealed ticket.The influence of dirt on reflected light is proportional to the density of the banknote, and the output waveform of circulating banknotes8-
2 is integrated by the above-mentioned calculation method. After the circulating banknote passes through the light receiving element 17, the central redemption processing device 5 calculates the maximum value on each scanning line. IBla! Calculate the minimum value B sin and perform normalization. If this calculation result is 3 units, then BO
becomes, and the relationship Ao = B mouth holds true.

次に、第3図に紙幣を照らす発光源の光量が低下した場
合の第1図での増幅器2の出力波形を示す図である。I
WI図において、9−1は完封券の出力波形で、9−2
は出力波形9−1の完封券と同一のものにおける発光源
の光量が低、下した場合で、同一金種、同一走査線上の
出力波形である。各々の場合における紙幣の出力波形9
−1゜9−2の最大値A mar、 Craax及び最
小値ANZI。
Next, FIG. 3 is a diagram showing the output waveform of the amplifier 2 in FIG. 1 when the amount of light from the light emitting source that illuminates the banknotes is reduced. I
In the WI diagram, 9-1 is the output waveform of a shutout ticket, and 9-2 is the output waveform of a shutout ticket.
The output waveforms 9-1 and 9-1 are output waveforms when the light intensity of the light emitting source is low for the same ticket as the sealed ticket, the same denomination, and the same scanning line. Banknote output waveform 9 in each case
-1°9-2 maximum value A mar, Craax and minimum value ANZI.

Ca1nの関係は As+ax −Cmax = Am1n −Csin 
  T瞳・−(4)の関係式が成り立つ、ここで、出力
波形9−2について前述の演算方法により正規化した結
果をCOとすると、0口は 元(Ci−C■1ガ) CO−□     ・・・・・・(5)C■d菖 −C
sin となり、A口=C,の関係が成り立つ。
The relationship of Ca1n is As+ax −Cmax = Am1n −Csin
The relational expression T pupil - (4) holds true.Here, if the result of normalizing the output waveform 9-2 using the calculation method described above is CO, then 0 mouth is the original (Ci-C■1ga) CO- □ ・・・・・・(5) C■d irises -C
sin, and the relationship A=C holds true.

以上のように、流通紙幣での汚れ及び発光源の光量低下
等による受光素子の出力変化への影響は紙幣の積分値の
正規化することによりなくすことができる。
As described above, the influence on the output change of the light receiving element due to dirt on circulating banknotes, a decrease in the light intensity of the light emitting source, etc. can be eliminated by normalizing the integral value of the banknote.

なお、本実施例では紙葉類の走査線上全体にわたり積分
し正規化を行なったが、走査線上を分割して前述の方法
で積分し正規化を行なったり、紙葉類の走行と同期した
サンプリングタイミング毎の値に対して前述の方法で得
た最大値と最小値の電位差により各々正規化し、この正
規化されたサンプリングデータを特徴パラメータとして
用いてもよい、また、増幅器2の出力をA/D変換して
いるが、ディジタル変換時の分解能が高い程、更にサン
プリング周波数が高い程より高精度の判定が行なえるの
は言うまでもない。
Note that in this example, normalization was performed by integrating over the entire scanning line of the paper sheet, but it is also possible to divide the scanning line and perform integration and normalization using the method described above, or to perform sampling synchronized with the movement of the paper sheet. The values for each timing may be normalized by the potential difference between the maximum value and the minimum value obtained by the method described above, and this normalized sampling data may be used as a characteristic parameter.Also, the output of the amplifier 2 may be Although D conversion is used, it goes without saying that the higher the resolution during digital conversion and the higher the sampling frequency, the more accurate the determination can be made.

(発明の効果) 以上説明したように、この発明によれば、紙幣等の紙葉
類の走査線上で得られる友射光あるいは透過光を電気信
号に変換し、この電気信号の最小値を積分値算出の基準
値に設定し、さらに前記走査線上で得られた電気信号の
最小値と最大値の電位差により出力波形の正規化を行な
ってその!i類及び真偽の判別を行なうので、判別に際
して紙葉類の汚れや発光源の光量低下等の影響を受ける
ことがない、更に、判別基準値の許容範囲を小さく設定
することが可能となり偽造紙幣等を確実に排除し、かつ
安定な真券の鑑別を行なうことができる紙葉類鑑別方法
を提供できる。
(Effects of the Invention) As explained above, according to the present invention, friendly radiation or transmitted light obtained on the scanning line of paper sheets such as banknotes is converted into an electrical signal, and the minimum value of this electrical signal is converted into an integral value. The standard value for calculation is set, and the output waveform is normalized using the potential difference between the minimum value and the maximum value of the electrical signal obtained on the scanning line. Since it discriminates between Class I and authenticity, the discrimination is not affected by dirt on paper sheets or a decrease in the light intensity of the light source.Furthermore, it is possible to set the acceptable range of the discrimination standard value to a small value, thereby preventing counterfeiting. It is possible to provide a method for discriminating paper sheets, which can reliably exclude banknotes and the like and stably distinguish genuine bills.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は、この発明の一実施例を示すブロック図、第2
図は第1図での増幅器の出力波形を示す図、第3図は発
光源の光量が低下したときの増幅器の出力波形を示す図
、第4図は従来の方法による増幅器の出力波形を示す図
である。 1・・・受光素子。 2・・・増幅器。 3・・・A/D変換器、 4・・・バッファ。 5・・・中央演算処理装置、 6・・・記憶回路、 7・・・判別基準値記憶回路。 8−1 、8−2 、9−1 、9−2・・・ 出力波
形。
FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure shows the output waveform of the amplifier in Fig. 1, Fig. 3 shows the output waveform of the amplifier when the light intensity of the light source decreases, and Fig. 4 shows the output waveform of the amplifier according to the conventional method. It is a diagram. 1... Light receiving element. 2...Amplifier. 3... A/D converter, 4... Buffer. 5... Central processing unit, 6... Memory circuit, 7... Discrimination reference value memory circuit. 8-1, 8-2, 9-1, 9-2... Output waveform.

Claims (1)

【特許請求の範囲】[Claims] 紙葉類に発光源より光を照射して走査し、得られる反射
光あるいは透過光を受光素子により電気信号に光電変換
し、前記紙葉類の走行と同期した基準タイミングにより
光電変換出力をサンプリングした値と基準値との差を累
積加算して積分値を求め、該積分値と予め定められる判
別基準値とを比較し、比較結果によって前記紙葉類の種
類及び真偽を判定する紙葉類鑑別方法において、前記紙
葉類の各走査線上の前記電気信号の最小値及び最大値を
検出し、該最小値を前記基準値に設定したときの積分値
を算出し、前記最小値と前記最大値の電位差に対する前
記積分値の比率を前記判別基準値と比較することにより
前記紙葉類の種類及び真偽を判定することを特徴とする
紙葉類鑑別方法。
A paper sheet is irradiated with light from a light emitting source and scanned, the resulting reflected or transmitted light is photoelectrically converted into an electrical signal by a light receiving element, and the photoelectric conversion output is sampled at a reference timing synchronized with the travel of the paper sheet. The difference between the calculated value and a reference value is cumulatively added to obtain an integral value, the integral value is compared with a predetermined discrimination reference value, and the type and authenticity of the paper sheet are determined based on the comparison result. In the type discrimination method, a minimum value and a maximum value of the electric signal on each scanning line of the paper sheet are detected, an integral value is calculated when the minimum value is set as the reference value, and the minimum value and the A paper sheet discrimination method, characterized in that the type and authenticity of the paper sheet are determined by comparing the ratio of the integral value to the maximum potential difference with the discrimination reference value.
JP59239375A 1984-11-15 1984-11-15 Paper leaf identification method Expired - Fee Related JPH0648511B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59239375A JPH0648511B2 (en) 1984-11-15 1984-11-15 Paper leaf identification method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59239375A JPH0648511B2 (en) 1984-11-15 1984-11-15 Paper leaf identification method

Publications (2)

Publication Number Publication Date
JPS61118891A true JPS61118891A (en) 1986-06-06
JPH0648511B2 JPH0648511B2 (en) 1994-06-22

Family

ID=17043837

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59239375A Expired - Fee Related JPH0648511B2 (en) 1984-11-15 1984-11-15 Paper leaf identification method

Country Status (1)

Country Link
JP (1) JPH0648511B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100590A (en) * 1980-12-16 1982-06-22 Tokyo Shibaura Electric Co Note discriminator
JPS6061883A (en) * 1983-09-14 1985-04-09 グローリー工業株式会社 Sheet paper identifier

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57100590A (en) * 1980-12-16 1982-06-22 Tokyo Shibaura Electric Co Note discriminator
JPS6061883A (en) * 1983-09-14 1985-04-09 グローリー工業株式会社 Sheet paper identifier

Also Published As

Publication number Publication date
JPH0648511B2 (en) 1994-06-22

Similar Documents

Publication Publication Date Title
CN1059509C (en) Bill discriminating apparatus for bill handling machine
US5640463A (en) Method and apparatus for authenticating documents including currency
US5867589A (en) Method and apparatus for document identification
US6104036A (en) Apparatus and method for detecting a security feature in a currency note
JPH02168372A (en) Bundle number detector
JPS61118891A (en) Sheet paper discrimination
JP3381828B2 (en) Method and apparatus for determining damage to paper sheets
JP4479118B2 (en) Media discrimination device
JP2896288B2 (en) Banknote identification method
JP2810776B2 (en) Bill validator
JPS60220484A (en) Paper money damage discrimination system
JPH07272043A (en) Kind discriminating device for paper sheets
JPS59188794A (en) Security thread detector
JPS59112385A (en) Sheet paper discriminator
JP3653556B2 (en) Banknote recognition device
JPH02193288A (en) Method for correcting paper currency data
JPS61143897A (en) Detector for sheet paper
JPS63182798A (en) Sheet paper fouling discriminator
JPS5911156B2 (en) Paper leaf identification method
JPH02193289A (en) Method for correcting paper currency data
JPH10208102A (en) Device for discriminating counterfeit paper money
JPS62241094A (en) Sheet paper authenticity discrimination system
JP2006099197A (en) Bill identification unit
JPH05217051A (en) Paper sheet discriminating device
JPH07239960A (en) Paper money discrimination device

Legal Events

Date Code Title Description
LAPS Cancellation because of no payment of annual fees