JP5227527B2 - 磁性体検出センサ - Google Patents
磁性体検出センサ Download PDFInfo
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- JP5227527B2 JP5227527B2 JP2007088034A JP2007088034A JP5227527B2 JP 5227527 B2 JP5227527 B2 JP 5227527B2 JP 2007088034 A JP2007088034 A JP 2007088034A JP 2007088034 A JP2007088034 A JP 2007088034A JP 5227527 B2 JP5227527 B2 JP 5227527B2
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- magnetic
- magnetic field
- detection
- magnet
- field detection
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- 238000001514 detection method Methods 0.000 title claims description 286
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- 239000010409 thin film Substances 0.000 claims description 8
- 230000005381 magnetic domain Effects 0.000 claims description 5
- 230000035945 sensitivity Effects 0.000 description 13
- 238000009826 distribution Methods 0.000 description 11
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- 238000010586 diagram Methods 0.000 description 8
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- 230000006870 function Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 5
- 230000005389 magnetism Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
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- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
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- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
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- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
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Landscapes
- Measuring Magnetic Variables (AREA)
Description
2 磁性体検出装置
12、120、121、122 磁石
13、14、130、131 磁界検出素子
15、16、150 磁性膜
17、18、19、20 電極
21、22、210 基板
23、230、231、232、233 媒体
24、241、242 シールド
25 ケース
26 ホルダー
27、28 端子
29 回路基板
30 はんだ
31 銅配線
32、320 プリント基板
33 駆動回路
34、340 搬送路形成部材
35 コンパレータ
36 カウンタ
37 A/Dコンバータ
38 メモリ
39 CPU
40 スイッチ
41 アンド回路
91、94、95 磁石
921、922 磁界検出素子
93 バイアス磁石
Claims (7)
- 磁界を発生する磁石と前記磁界の変化を検出する磁性膜を有する磁界検出素子とを備え、磁性材料を含む被検出媒体を検出する磁性体検出センサにおいて、
前記磁石のNS方向を法線とし、前記磁石のNS軸とその中点を除くN極とS極の間の点で交わる平面上に、前記磁界検出素子はその磁界検出方向が前記平面と平行になるように配置され、前記磁性膜は磁性薄膜であって前記平面に沿った磁気異方性を有し且つ前記磁性膜の磁化が磁界検出方向に揃った磁区構造を有し、
前記磁界検出素子に前記磁石により形成されるバイアス磁界を印加し、前記被検出媒体が前記磁石のN極またはS極に近接した際の前記バイアス磁界の変化を前記磁界検出素子の前記磁性膜のインピーダンス変化により検出することを特徴とする磁性体検出センサ。 - 前記磁界検出方向は、前記磁石のNS軸の動径方向から傾けて配置されていることを特徴とする請求項1に記載の磁性体検出センサ。
- 前記磁界検出素子は少なくとも2つあり、前記磁界検出素子の夫々に印加される前記バイアス磁界の向きは互いに逆方向であり、前記2つの磁界検出素子の出力の和を信号として出力することを特徴とする請求項1または2に記載の磁性体検出センサ。
- 前記2つの磁界検出素子は直列に接続され、前記接続された2つの磁界検出素子の両端に発生する電圧が信号として出力されることを特徴とする請求項3に記載の磁性体検出センサ。
- 請求項1から4のいずれか1項に記載の磁性体検出センサが、長尺の前記磁石に沿って複数配列されていることを特徴とする磁性体検出ラインセンサ。
- 請求項1から4のいずれか1項に記載の磁性体検出センサ、または請求項5に記載の磁性体検出ラインセンサを用いて前記被検出媒体の検出を行うことを特徴とする磁性体検出装置。
- 前記磁性体検出センサによる前記被検出媒体の検出前の出力と、前記被検出媒体を検出した際の出力との差に応じた信号を出力することを特徴とする請求項6に記載の磁性体検出装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007088034A JP5227527B2 (ja) | 2007-03-29 | 2007-03-29 | 磁性体検出センサ |
US12/056,880 US20080238417A1 (en) | 2007-03-29 | 2008-03-27 | Magnetic substance detection sensor and magnetic substance detecting apparatus |
CN2008100879988A CN101275992B (zh) | 2007-03-29 | 2008-03-28 | 磁性物质检测传感器和磁性物质检测装置 |
EP08153527A EP1975637B1 (en) | 2007-03-29 | 2008-03-28 | Magnetic substance detection sensor and magnetic substance detecting apparatus |
CN201210281433.XA CN102819001B (zh) | 2007-03-29 | 2008-03-28 | 磁性物质检测传感器和磁性物质检测装置 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007088034A JP5227527B2 (ja) | 2007-03-29 | 2007-03-29 | 磁性体検出センサ |
Publications (3)
Publication Number | Publication Date |
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JP2008249371A JP2008249371A (ja) | 2008-10-16 |
JP2008249371A5 JP2008249371A5 (ja) | 2010-05-06 |
JP5227527B2 true JP5227527B2 (ja) | 2013-07-03 |
Family
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JP2007088034A Active JP5227527B2 (ja) | 2007-03-29 | 2007-03-29 | 磁性体検出センサ |
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Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5165963B2 (ja) * | 2007-08-14 | 2013-03-21 | 新科實業有限公司 | 磁気センサ及びその製造方法 |
DE102009008265B4 (de) * | 2009-02-10 | 2011-02-03 | Sensitec Gmbh | Anordnung zur Messung mindestens einer Komponente eines Magnetfeldes |
JP6359858B2 (ja) * | 2014-04-04 | 2018-07-18 | キヤノン電子株式会社 | 磁界検出装置および磁気識別装置 |
JP2016095138A (ja) * | 2014-11-12 | 2016-05-26 | Tdk株式会社 | 磁気センサ |
JP6202282B2 (ja) * | 2015-02-17 | 2017-09-27 | Tdk株式会社 | 磁気センサ |
JP6370768B2 (ja) * | 2015-11-26 | 2018-08-08 | 矢崎総業株式会社 | 磁界検出センサ |
JP2023097943A (ja) * | 2021-12-28 | 2023-07-10 | グローリー株式会社 | 磁気特徴検出装置及び紙葉類識別装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0710245Y2 (ja) * | 1985-05-14 | 1995-03-08 | 東北金属工業株式会社 | 磁気センサー |
WO1992012438A1 (fr) * | 1990-12-28 | 1992-07-23 | Kabushiki Kaisha Komatsu Seisakusho | Detecteur magnetique et structure de son montage |
JP3764834B2 (ja) * | 1999-10-22 | 2006-04-12 | キヤノン電子株式会社 | 電流センサー及び電流検出装置 |
JP2002243766A (ja) * | 2001-02-16 | 2002-08-28 | Fuji Electric Co Ltd | 電流センサ |
JP2004206316A (ja) * | 2002-12-25 | 2004-07-22 | Fuji Electric Retail Systems Co Ltd | 磁気検出装置 |
JP4541136B2 (ja) * | 2004-12-28 | 2010-09-08 | キヤノン電子株式会社 | 磁性体検出センサ及び磁性体検出ラインセンサ |
US7759931B2 (en) * | 2005-03-14 | 2010-07-20 | National University Corporation, Okayama University | Device for measuring magnetic impedance |
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- 2007-03-29 JP JP2007088034A patent/JP5227527B2/ja active Active
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