JP2896288B2 - Banknote identification method - Google Patents
Banknote identification methodInfo
- Publication number
- JP2896288B2 JP2896288B2 JP5121326A JP12132693A JP2896288B2 JP 2896288 B2 JP2896288 B2 JP 2896288B2 JP 5121326 A JP5121326 A JP 5121326A JP 12132693 A JP12132693 A JP 12132693A JP 2896288 B2 JP2896288 B2 JP 2896288B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- detection
- bill
- value
- 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.)
- Expired - Lifetime
Links
Landscapes
- Image Processing (AREA)
- Image Analysis (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は紙幣識別方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for identifying bills.
【０００２】[0002]
【従来の技術】銀行やパチンコ店等では、紙幣識別装置
を備えた各種紙幣の両替器が普及している。しかるに昨
今ではコピー技術、印刷技術が向上し、そのために一見
真正紙幣と見分けのつかない贋札が横行し、紙幣識別装
置でも判別がつかず、大きな社会問題となっている。例
えば特願平２−３１２４８号に示されている紙幣識別方
法は次の方法によっている。すなわち、近赤外光を発光
する発光素子と、反射光を受光する受光素子とを検査対
象紙幣上を走査させて受光素子により反射光を受光し、
この検出信号を比較手段に入力する。検出信号は、図２
に一例を示すようなパターンになるが、検出位置をあら
かじめパターンの複数の極大値、極小値位置となるよう
に選択すると共に、該検出位置での検出信号にあらかじ
め上限値と下限値を設定し、検査対象紙幣からの各検出
位置での反射光の検出信号値が上記上限値と下限値の範
囲内にあるかどうかを判定し、該範囲内にあれば真正紙
幣、範囲外にあれば贋札と判定するものである。2. Description of the Related Art Banks, pachinko parlors, and the like have come into widespread use of various banknote changers equipped with a banknote recognition device. However, in recent years, copy technology and printing technology have been improved, and as a result, counterfeit bills that seemingly cannot be distinguished from genuine banknotes are rampant, and the banknote recognition device is indistinguishable, which is a major social problem. For example, the banknote identification method disclosed in Japanese Patent Application No. 2-31248 is based on the following method. That is, a light-emitting element that emits near-infrared light, and a light-receiving element that receives reflected light are scanned on the banknote to be inspected, and reflected light is received by the light-receiving element.
This detection signal is input to the comparison means. The detection signal is shown in FIG.
The detection position is selected in advance to be a plurality of maximum values and minimum values of the pattern, and an upper limit value and a lower limit value are set in advance to the detection signal at the detection position. It is determined whether the detection signal value of the reflected light at each detection position from the inspection target banknote is within the range of the upper limit and the lower limit, and if it is within the range, a genuine banknote is detected; Is determined.
【０００３】[0003]
【発明が解決しようとする課題】しかし上記従来の紙幣
識別方法には次のような問題点がある。すなわち、検査
対象紙幣からの反射光にはバラツキがある。上記のよう
に各検出位置での検出信号があらかじめ定めた上限値と
下限値の範囲内にあるかどうかで判定するようにしたの
はこのバラツキを考慮してのものである。しかしなが
ら、新札同士の間でも反射光にはかなりのバラツキがあ
るだけでなく、新札と古い札との間での反射光の量には
大きな差が生じてしまう。したがってこのような大きな
バラツキを考慮に入れると、上記上限値と下限値との幅
を相当に大きなものに設定せねばならず、これでは贋札
を真正紙幣と間違えて判定してしまう不都合がある。実
際従来のものでは、真正紙幣のコピー品をも真正な紙幣
と判定してしまうおそれが多分にあった。また上限値と
下限値の幅を小さく設定すると、今度は逆に真正紙幣を
も贋札と判定してしまう不都合があった。However, the above-mentioned conventional banknote identification method has the following problems. That is, the reflected light from the banknote to be inspected varies. As described above, the determination is made based on whether or not the detection signal at each detection position is within the range between the predetermined upper limit value and lower limit value in consideration of this variation. However, not only does the reflected light vary considerably between new bills, but also there is a large difference in the amount of reflected light between the new bill and the old bill. Therefore, in consideration of such a large variation, the width between the upper limit value and the lower limit value must be set to a considerably large value, which causes a problem that the forged bill is erroneously determined as a genuine bill. In fact, in the conventional one, there is a possibility that a copy of a genuine bill may be judged as a genuine bill. In addition, if the width between the upper limit and the lower limit is set to be small, there is a disadvantage that a genuine bill is determined to be a counterfeit bill.
【０００４】そこで、本発明は上記問題点を解決すべく
なされたものであり、その目的とするところは、判定精
度を向上させることのできる紙幣識別方法を提供するに
ある。Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a bill discriminating method capable of improving the judgment accuracy.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するため次の構成を備える。すなわち、紙幣の一部を直
線状に検出する検出ゾーンとして選択し、検査対象紙幣
について、前記選択された検出ゾーンに沿って発光素子
と反射光を受光する受光素子を走査させ、前記発光素子
から前記検出ゾーンに向かって発光し、前記受光素子で
は前記検出ゾーンからの反射光を検出し、前記受光素子
で得られる反射光の検出信号を比較手段に入力し、該比
較手段にてあらかじめ入力してある真正紙幣の反射光の
検出信号パターンと比較して真贋を識別する紙幣識別方
法において、あらかじめ真正紙幣からの反射光のパター
ンを解析して、前記検出信号の極大値、極小値があらわ
れる前記検出ゾーン上の位置を複数検出すると共に、検
出した複数の該位置の内の隣接する極大値の位置と極小
値の位置を組み合わせて一つの極大値の位置と一つの極
小値の位置とからなる組を複数設定し、設定された前記
組の前記極大値と極小値の差を基準として各組毎の極大
値と極小値の差の基準値を設定し、前記比較手段では、
前記各組の検出位置における検出信号の差を検出し、該
検出した検出信号の差が前記基準値の範囲内にあるかど
うかを判定して、該基準値内にあれば真正紙幣、基準値
外のときは贋紙幣と判定することを特徴とする。また、
前記検査対象紙幣からの反射光の検出信号を前記比較手
段に入力する際、前記受光素子の検出信号を、前記発光
素子と該受光素子のばらつきを補正すべく、あらかじめ
決められた増幅率にしたがって増幅して前記比較手段に
入力するようにすると良い。The present invention has the following arrangement to achieve the above object. That is, a part of the banknote is selected as a detection zone for linear detection, and a banknote to be inspected is scanned with a light-emitting element and a light-receiving element that receives reflected light along the selected detection zone, from the light-emitting element. Light is emitted toward the detection zone, the light receiving element detects reflected light from the detection zone, and inputs a detection signal of reflected light obtained by the light receiving element to comparison means, which is input in advance by the comparison means. In a bill identification method for identifying authenticity by comparing with a detection signal pattern of reflected light of a genuine bill, the pattern of reflected light from a genuine bill is analyzed in advance, and the maximum value and the minimum value of the detection signal appear. the position on the detection zone with a plurality of detection, test
Combining the positions of the local maximum value and the position of the local minimum value from among the plurality of positions that have been issued , sets a plurality of sets each including one maximum value position and one local minimum position, and sets the set. Setting a reference value of the difference between the maximum value and the minimum value for each group based on the difference between the maximum value and the minimum value of
Detecting the difference between the detection signals at the detection positions of the respective sets, determining whether the difference between the detected detection signals is within the range of the reference value, and if the difference is within the reference value, a genuine bill, the reference value When outside, it is determined to be a false banknote. Also,
When inputting the detection signal of the reflected light from the banknote to be inspected to the comparing means, the detection signal of the light receiving element is corrected according to a predetermined amplification factor to correct the variation between the light emitting element and the light receiving element. It is preferable that the signal be amplified and input to the comparing means.
【０００６】[0006]
【作用】各組の検出位置における検出信号の差を検出
し、該検出した検出信号の差があらかじめ設定されてい
る基準値の範囲内にあるかどうかを判定して、基準値内
にあれば真正紙幣、基準値外のときは贋紙幣と判定す
る。紙幣の反射光の量は新札と古札では大きな違いがあ
るが、反射光の極大値と極小値との差は新札と古札では
それほど大きな違いがないため、基準値の幅を大きくす
る必要がなく判定精度を向上させることができる。また
発光素子と受光素子とのバラツキを補正して受光素子か
らの検出信号をあらかじめ決定された増幅率により増幅
して比較手段に入力するようにしたので、用いる素子に
関係なく基準値を一定に設定でき、マイクロコンピュー
タによる制御が可能になった。[Action] detects the difference of the detection signals in each set of detection positions, to determine whether it is within range of the reference value the difference between the detection signals the detected has been set in advance, if it is within the reference value If it is a genuine bill or out of the standard value , it is judged as a fake bill .
You. The amount of reflected light of bills differs greatly between new and old bills.
However, the difference between the maximum value and the minimum value of the reflected light is
Since there is not much difference, increase the width of the reference value.
It is not necessary to perform the determination, and the determination accuracy can be improved. In addition, since the variation between the light emitting element and the light receiving element is corrected and the detection signal from the light receiving element is amplified by a predetermined amplification factor and input to the comparing means, the reference value is kept constant regardless of the element used. It can be set and controlled by a microcomputer.
【０００７】[0007]
【実施例】以下、本発明の好適な実施例を添付図面に基
づいて詳細に説明する。図１は原理図を示し、１０は発
光素子、１２は受光素子、１４は増幅器、１６は演算制
御部である。１８は紙幣を示す。発光素子１０から紙幣
１８に向けて近赤外光を発し、紙幣１８で反射された反
射光が受光素子１２で受光される。受光素子１２で電圧
値として出力される検出信号は増幅器１４によりあらか
じめ決められた増幅率により増幅されて演算制御部１６
に入力される。発光素子１０と受光素子１２とは紙幣１
８の決められた直線上を走査する。この走査機構は従来
と同様の機構を採用できるので特に説明しない。素子側
を走らせてもよいし、紙幣を走らせてもよい。DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a principle diagram, 10 is a light emitting element, 12 is a light receiving element, 14 is an amplifier, and 16 is an arithmetic control unit. Reference numeral 18 denotes a bill. The light emitting element 10 emits near-infrared light toward the bill 18, and the light reflected by the bill 18 is received by the light receiving element 12. The detection signal output as a voltage value by the light receiving element 12 is amplified by an amplifier 14 at a predetermined amplification factor, and
Is input to The light emitting element 10 and the light receiving element 12 are the bill 1
8 is scanned on the determined straight line. This scanning mechanism is not particularly described because it can employ a mechanism similar to the conventional one. The element side may be run, or a bill may be run.
【０００８】図２は受光素子１２での反射光の検出パタ
ーン例を示す。紙幣の印刷インクには近赤外光を反射す
るインクが一部用いられており、印刷パターンの濃淡等
により図示のごとくいくつかの極大値Ｐ1 、Ｐ2 、Ｐ3
と極小値Ｌ1 、Ｌ2 、Ｌ3 があらわれる。上記の極大値
Ｐ1 、Ｐ2 、Ｐ3 と極小値Ｌ1 、Ｌ2 、Ｌ3 があらわれ
る位置を検出位置に設定する。この検出位置の設定は、
基準となる新札での反射光パターンの検出から実際に経
験的に求められ、メモリーに格納される。なお、この検
出位置はロータリーエンコーダーを用いて、紙幣１８の
走査線上の印刷開始位置からカウントを開始して、極大
値、極小値があらわれる位置をカウントし、この数値に
より設定する。FIG. 2 shows an example of a detection pattern of the reflected light from the light receiving element 12. As the printing ink for banknotes, ink that reflects near-infrared light is partially used, and some maximum values P 1 , P 2 , P 3 are shown as shown in FIG.
And the minimum values L 1 , L 2 and L 3 appear. The position where the above maximum values P 1 , P 2 , P 3 and the minimum values L 1 , L 2 , L 3 appear are set as detection positions. The setting of this detection position
It is actually empirically obtained from the detection of the reflected light pattern on the reference new bill and stored in the memory. This detection position is counted from the printing start position on the scanning line of the bill 18 by using a rotary encoder, and the position where the maximum value and the minimum value appear is counted, and this value is set.
【０００９】また本発明での判定基準は、上記隣接する
極大値と極小値の各組の検出信号の差を基準とする。す
なわち、Ｐ1 −Ｌ1 ＝Ｘ1 、Ｐ2 −Ｌ2 ＝Ｘ2 、Ｐ3 −
Ｌ3 ＝Ｘ3 の値を基準とし、これに新札、古い札等の反
射光の強度のバラツキを実測して経験的に求められた許
容値を設定し、例えばＸ1 ＝３±０．５（Ｖ）、Ｘ2 ＝
２±０．４（Ｖ）、Ｘ3 ＝１．８±０．３（Ｖ）等の基
準値を設定し、これをメモリーに格納しておく。検査対
象紙幣の検出においては、上記設定された各検出位置で
の検出信号値が演算制御部１６に入力され、一旦メモリ
ーに格納された後、隣接する極大値極小値の差が計算さ
れ、この差の値と前記設定された基準値とが比較され、
基準値の範囲内にあれば真正の紙幣、基準値外であれば
贋札と判定するのである。真正の紙幣であればそのまま
両替等を行い、贋札と判定されれば警報器を作動させた
り、両替をせず、紙幣をそのまま排出等する。反射光の
極大値と極小値の差は新札と古札でそれほど大きな違い
がなく、測定精度が向上する。Further, the criterion in the present invention is based on the difference between the detection signals of each pair of the adjacent maximum value and minimum value. That is, P 1 −L 1 = X 1 , P 2 −L 2 = X 2 , P 3 −
Based on the value of L 3 = X 3 , an allowable value determined empirically by actually measuring the variation in the intensity of the reflected light of the new bill, the old bill, etc. is set. For example, X 1 = 3 ± 0. 5 (V), X 2 =
Reference values such as 2 ± 0.4 (V) and X 3 = 1.8 ± 0.3 (V) are set and stored in a memory. In the detection of the banknote to be inspected, the detection signal value at each of the set detection positions is input to the arithmetic and control unit 16, temporarily stored in a memory, and then the difference between adjacent maximum and minimum values is calculated. The difference value is compared with the set reference value,
If it is within the range of the reference value, it is determined to be a genuine bill, and if it is outside the reference value, it is determined to be a fake bill. If it is a genuine bill, the currency is exchanged as it is, and if it is determined to be a counterfeit bill, the alarm is activated or the bill is discharged as it is without exchanging. The difference between the maximum value and the minimum value of the reflected light is not so large between the new bill and the old bill, and the measurement accuracy is improved.
【００１０】なお、受光素子１２での受光信号をあらか
じめ設定された増幅率にて増幅して演算制御部１６に入
力するのは、半導体センサからなる発光素子１０、受光
素子１２のバラツキを補正するためである。すなわち半
導体センサはバラツキが大きく、同じ電力でも発光量に
バラツキがあり、同じ受光量でも出力信号値にバラツキ
があるからである。このバラツキをなくすため、ある基
準となる発光素子１０と受光素子１２を選択して、この
基準素子により基準紙幣からの反射光のパターンを求め
る。そのためにまず白紙（ブランク）を走査して反射光
を検出し、次に基準紙幣を走査して反射光を検出し、両
者の差を求めて基準紙幣からの反射光のパターンとす
る。次に用いようとする発光素子１２と受光素子１２に
より上記と同様にして基準紙幣からの反射光のパターン
を求める。基準素子と用いようとする素子との間の特性
のバラツキにより得られたパターン間に差が生じてい
る。この差を解消するため、例えば基準素子による検出
値の最大値が４Ｖ、用いようとする素子による検出値が
２Ｖであれば、用いようとする素子の増幅率を２倍に設
定し、こうして決められた増幅率により増幅器１４にて
増幅して演算制御部１６に入力するのである。このよう
にすることで、用いる素子に関係なく、上記基準値Ｘ1
＝３±０．５（Ｖ）、Ｘ2 ＝２±０．４（Ｖ）、Ｘ3 ＝
１．８±０．３（Ｖ）を共通に設定でき、マイクロコン
ピュータによる制御が可能となる。The reason why the light receiving signal from the light receiving element 12 is amplified at a preset amplification factor and input to the arithmetic control unit 16 is to correct the variation between the light emitting element 10 and the light receiving element 12 comprising semiconductor sensors. That's why. That is, the semiconductor sensors have large variations, the amount of emitted light varies even with the same power, and the output signal values vary even with the same amount of received light. In order to eliminate this variation, a light-emitting element 10 and a light-receiving element 12 are selected as a reference, and a pattern of light reflected from the reference bill is obtained by using the reference element. For this purpose, first, a white paper (blank) is scanned to detect reflected light, then, a reference bill is scanned to detect reflected light, and a difference between the two is obtained as a pattern of reflected light from the reference bill. Next, the pattern of the reflected light from the reference bill is obtained by the light emitting element 12 and the light receiving element 12 to be used in the same manner as described above. A difference occurs between the obtained patterns due to variations in characteristics between the reference element and the element to be used. In order to eliminate this difference, for example, if the maximum value of the detection value of the reference element is 4 V and the detection value of the element to be used is 2 V, the amplification factor of the element to be used is set to twice, and thus determined. The signal is amplified by the amplifier 14 according to the gain thus obtained and input to the arithmetic control unit 16. By doing so, the reference value X 1 can be obtained regardless of the element used.
= 3 ± 0.5 (V), X 2 = 2 ± 0.4 (V), X 3 =
1.8 ± 0.3 (V) can be commonly set, and control by a microcomputer becomes possible.
【００１１】紙幣１８からの反射光の検出は紙幣１８の
片面だけでもよいが、表裏面からの反射光をそれぞれ検
出することによりさらに精度よく真贋の判定ができる。
上記実施例では近赤外光による検出を試みたが、可視光
センサを用いてもよい。もちろん近赤外光センサと可視
光センサとを併設するようにすれば、さらに精度を向上
させることができる。また図示しないが、札を透過する
透過光を検出するセンサを併設することで、透過光の大
きさにより札の厚さを検出でき、誤って札を２枚入れた
場合などの判定ができるし、また紙の厚さにより真贋の
判定の一要素とすることもできる。Although the reflected light from the bill 18 may be detected on only one side of the bill 18, the authenticity can be determined with higher accuracy by detecting the reflected lights from the front and back surfaces, respectively.
In the above embodiment, detection using near infrared light was attempted, but a visible light sensor may be used. Of course, if the near-infrared light sensor and the visible light sensor are provided side by side, the accuracy can be further improved. Although not shown, a sensor for detecting transmitted light passing through the tag is provided, so that the thickness of the tag can be detected based on the size of the transmitted light, and it is possible to determine whether two cards are inserted by mistake. Also, it can be used as one element of the authenticity judgment based on the thickness of the paper.
【００１２】以上本発明につき好適な実施例を挙げて種
々説明したが、本発明はこの実施例に限定されるもので
はなく、発明の精神を逸脱しない範囲内で多くの改変を
施し得るのはもちろんである。Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to these embodiments, and it is possible to make various modifications without departing from the spirit of the invention. Of course.
【００１３】[0013]
【発明の効果】本発明によれば、各組の検出位置におけ
る検出信号の差を検出し、該検出した検出信号の差があ
らかじめ設定されている基準値の範囲内にあるかどうか
を判定して、基準値内にあれば真正紙幣、基準値外のと
きは贋紙幣と判定できる。そして、紙幣の反射光の量は
新札と古札では大きな違いがあるが、反射光の極大値と
極小値との差は新札と古札ではそれほど大きな違いがな
いため、基準値の幅を大きくする必要がなく判定精度を
向上させることができる。また発光素子と受光素子との
バラツキを補正して受光素子からの検出信号を、あらか
じめ決定された増幅率により増幅して比較手段に入力す
るようにしたので、用いる素子に関係なく基準値を一定
に設定でき、マイクロコンピュータによる制御が可能に
なった。According to the present invention, a difference between detection signals at each set of detection positions is detected , and it is determined whether or not the difference between the detected detection signals is within a range of a preset reference value. Therefore, if the value is within the reference value , it can be determined as a genuine bill, and if the value is outside the reference value , it can be determined as a fake bill . And the amount of reflected light of the bill is
There is a big difference between the new bill and the old bill, but the maximum value of the reflected light
The difference between the minimum value and the old one is not so large.
Therefore, it is not necessary to increase the width of the reference
Can be improved. Since the detection signal from the correction to the light receiving element variations in the light emitting element and the light receiving element, Oh Raka <br/> was as input to the comparison means and amplified by dimethyl determined amplification factor is used The reference value can be set constant irrespective of the element, and can be controlled by a microcomputer.
【図１】ブロック図を示す。FIG. 1 shows a block diagram.
【図２】反射光の検出パターンの一例を示すグラフであ
る。FIG. 2 is a graph showing an example of a detection pattern of reflected light.
１０ 発光素子 １２ 受光素子 １４ 増幅器 １６ 演算制御部（比較手段） １８ 紙幣 DESCRIPTION OF SYMBOLS 10 Light emitting element 12 Light receiving element 14 Amplifier 16 Operation control part (comparison means) 18 Banknote
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) G07D 7/00 G06T 7/00 - 9/40 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. 6 , DB name) G07D 7/00 G06T 7/00-9/40
Claims (2)
ンとして選択し、検査対象紙幣について、前記選択され
た検出ゾーンに沿って発光素子と反射光を受光する受光
素子を走査させ、前記発光素子から前記検出ゾーンに向
かって発光し、前記受光素子では前記検出ゾーンからの
反射光を検出し、前記受光素子で得られる反射光の検出
信号を比較手段に入力し、該比較手段にてあらかじめ入
力してある真正紙幣の反射光の検出信号パターンと比較
して真贋を識別する紙幣識別方法において、 あらかじめ真正紙幣からの反射光のパターンを解析し
て、前記検出信号の極大値、極小値があらわれる前記検
出ゾーン上の位置を複数検出すると共に、検出した複数
の該位置の内の隣接する極大値の位置と極小値の位置を
組み合わせて一つの極大値の位置と一つの極小値の位置
とからなる組を複数設定し、 設定された前記組の前記極大値と極小値の差を基準とし
て各組毎の極大値と極小値の差の基準値を設定し、 前記比較手段では、前記各組の検出位置における検出信
号の差を検出し、該検出した検出信号の差が前記基準値
の範囲内にあるかどうかを判定して、該基準値内にあれ
ば真正紙幣、基準値外のときは贋紙幣と判定することを
特徴とする紙幣識別方法。1. A banknote is selected as a detection zone for detecting a part of a banknote in a straight line, and a banknote to be inspected is scanned with a light-emitting element and a light-receiving element for receiving reflected light along the selected detection zone. The light-emitting element emits light toward the detection zone, the light-receiving element detects reflected light from the detection zone, and inputs a detection signal of reflected light obtained by the light-receiving element to a comparison unit. In a bill identification method for identifying authenticity by comparing with a detection signal pattern of reflected light of a genuine bill previously input, the pattern of reflected light from a genuine bill is analyzed in advance, and the maximum value and the minimum value of the detection signal are analyzed. more together, the detected detecting a plurality of positions on the detection zone appears
A plurality of sets of one maximum value position and one minimum value position are set by combining adjacent maximum value positions and minimum value positions among the positions, and the maximum value of the set is set. Setting a reference value for the difference between the maximum value and the minimum value for each set based on the difference between the value and the minimum value, and the comparing means detects the difference between the detection signals at the detection positions of the sets, and performs the detection. A bill discriminating method, wherein it is determined whether or not the difference between the detection signals is within the range of the reference value, and if the difference is within the reference value, the banknote is determined to be a genuine banknote.
号を前記比較手段に入力する際、前記受光素子の検出信
号を、前記発光素子と該受光素子のばらつきを補正すべ
く、あらかじめ決められた増幅率にしたがって増幅して
前記比較手段に入力することを特徴とする請求項１記載
の紙幣識別方法。2. When a detection signal of reflected light from the banknote to be inspected is input to the comparing means, a detection signal of the light receiving element is determined in advance so as to correct a variation between the light emitting element and the light receiving element. 2. The bill discriminating method according to claim 1, wherein the amplified bill is amplified according to the amplification factor and input to the comparing means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121326A JP2896288B2 (en) | 1993-05-24 | 1993-05-24 | Banknote identification method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5121326A JP2896288B2 (en) | 1993-05-24 | 1993-05-24 | Banknote identification method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06333124A JPH06333124A (en) | 1994-12-02 |
| JP2896288B2 true JP2896288B2 (en) | 1999-05-31 |
Family
ID=14808486
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5121326A Expired - Lifetime JP2896288B2 (en) | 1993-05-24 | 1993-05-24 | Banknote identification method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2896288B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK1237128T3 (en) * | 2001-03-01 | 2012-10-29 | Sicpa Holding Sa | Detector for enhanced luminescent properties |
| JP2004326624A (en) | 2003-04-25 | 2004-11-18 | Aruze Corp | Discrimination sensor |
| JP2005100197A (en) | 2003-09-26 | 2005-04-14 | Aruze Corp | Identification sensor and device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6475925A (en) * | 1987-09-18 | 1989-03-22 | Oki Electric Ind Co Ltd | Automatic gain control apparatus |
| JPH01219989A (en) * | 1988-02-29 | 1989-09-01 | Musashi Eng Co Ltd | Counting and discriminating system for paper leaf |
| JPH0782565B2 (en) * | 1989-01-23 | 1995-09-06 | 沖電気工業株式会社 | Banknote data correction method |
-
1993
- 1993-05-24 JP JP5121326A patent/JP2896288B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06333124A (en) | 1994-12-02 |
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