【発明の詳細な説明】本発明は紙幣鑑別機の磁気検出回路に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic detection circuit for a bill validator.
一般的に紙幣鑑別機においては、紙幣の真偽を判定する
ため、紙幣の印刷インクに含まれる微弱な磁性成分を磁
気ヘッドと磁気信号増幅器により検出している。ところ
で、磁気信号増幅器は、磁気ヘッドで検出される磁気信
号が非常に微弱であるので、回路構成が高利得、低雑音
化の必要から量産性がなく、鑑別能力の向上のためＫは
紙幣の検出個所を増やすため磁気信号増幅回路も増やす
必要があり、装置が複雑になる欠点があった。Generally, in a banknote validator, in order to determine the authenticity of a banknote, a weak magnetic component contained in the printing ink of the banknote is detected using a magnetic head and a magnetic signal amplifier. By the way, since the magnetic signal detected by the magnetic head is very weak, the magnetic signal amplifier cannot be mass-produced because the circuit configuration needs to have high gain and low noise. In order to increase the number of detection points, it is necessary to increase the number of magnetic signal amplification circuits, which has the disadvantage of complicating the device.
本発明は上記した点に着目し、鑑別能力の向上のために
複数個の磁気ヘッドを設けつつ全体の増幅回路がそれに
伴つ又大型化しないようにしたものである。The present invention focuses on the above-mentioned points, and provides a plurality of magnetic heads in order to improve the discrimination ability, while preventing the overall amplification circuit from increasing in size.
第１図は従来の磁気検出回路を示すものであり、複数個
の磁気ヘッドＭＳ、、ＭＳ□・・・・・・ＭＳ、にそれ
ぞれ、磁気信号増幅器ム７．ム、・・・・・・ム、と磁
気レベル分離回路ＢＩ＋Ｊ・・・・・・Ｂ、を接続し、
これらを真偽判定回路ＯＫ接続している。FIG. 1 shows a conventional magnetic detection circuit, in which a plurality of magnetic heads MS, , MS□, . Connect the magnetic level separation circuit BI+J...B,
These are connected to the authenticity judgment circuit.
第２図は本発明の磁気検出回路を示すものであリ、複数
個の磁気ヘッドＭＳ、、ＭＳ、・・・・・・ＭＳｎはア
ナログもマルチプレクサＳＷｌ に接続され、これに対
応するアナログ・デマルチプレクサＳＷ。FIG. 2 shows the magnetic detection circuit of the present invention, in which a plurality of magnetic heads MS, MS, . Multiplexer SW.
間には１個の磁気信号増幅回路ムと１個の磁気レベル分
離回路Ｂが設けられるもので、アナログ・デマルチプレ
クサＳＷ、には真倫判定回路が接続される。One magnetic signal amplification circuit and one magnetic level separation circuit B are provided between them, and an authenticity determination circuit is connected to the analog demultiplexer SW.
本発明は上記した如＜ＩＣ，多数の磁気ヘッドを設けつ
つ増幅回路を１個だけで共用し得るので、性能を向上さ
せつつ構成を単純化して大型化すること力＜、品質の均
一化を計ることができる。As described above, the present invention allows a single amplifier circuit to be used in common even though a large number of ICs and magnetic heads are provided, thereby improving performance, simplifying the configuration and increasing the size, and making quality uniform. It can be measured.
第１図は従来の磁気検出回路のブロック図、第２図は本
発明にかかる磁気検出回路のブロック図である。ＭＳｌ 、Ｍｇ２・・・・・・ＭＳｌｌ・・・磁気ヘッ
ド、８Ｗ、、ｌｂＷ、・・・アナログスイッチ、ム・・
・・・・増幅回路。FIG. 1 is a block diagram of a conventional magnetic detection circuit, and FIG. 2 is a block diagram of a magnetic detection circuit according to the present invention. MSl, Mg2...MSll...Magnetic head, 8W, lbW,...Analog switch, M...
...Amplification circuit.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12236881AJPS5824984A (en) | 1981-08-06 | 1981-08-06 | Magnetic detection circuit for paper money discriminator |
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12236881AJPS5824984A (en) | 1981-08-06 | 1981-08-06 | Magnetic detection circuit for paper money discriminator |
| Publication Number | Publication Date |
|---|---|
| JPS5824984Atrue JPS5824984A (en) | 1983-02-15 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12236881APendingJPS5824984A (en) | 1981-08-06 | 1981-08-06 | Magnetic detection circuit for paper money discriminator |
| Country | Link |
|---|---|
| JP (1) | JPS5824984A (en) |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6388697A (en)* | 1986-10-02 | 1988-04-19 | 富士電機株式会社 | Paper money identifier |
| JP2005182115A (en)* | 2003-12-16 | 2005-07-07 | Sankyo Seiki Mfg Co Ltd | Driving circuit of paper sheet discriminating sensor and paper sheet discriminating device |
| JP2012123756A (en)* | 2010-12-10 | 2012-06-28 | Nidec Sankyo Corp | Magnetic pattern detection device |
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6388697A (en)* | 1986-10-02 | 1988-04-19 | 富士電機株式会社 | Paper money identifier |
| JP2005182115A (en)* | 2003-12-16 | 2005-07-07 | Sankyo Seiki Mfg Co Ltd | Driving circuit of paper sheet discriminating sensor and paper sheet discriminating device |
| JP2012123756A (en)* | 2010-12-10 | 2012-06-28 | Nidec Sankyo Corp | Magnetic pattern detection device |
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