JPH08511348A - 磁気抵抗近接センサ - Google Patents
磁気抵抗近接センサInfo
- Publication number
- JPH08511348A JPH08511348A JP7502151A JP50215195A JPH08511348A JP H08511348 A JPH08511348 A JP H08511348A JP 7502151 A JP7502151 A JP 7502151A JP 50215195 A JP50215195 A JP 50215195A JP H08511348 A JPH08511348 A JP H08511348A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- magnetoresistive
- bridge
- strip
- angle
- 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
Links
- 230000005291 magnetic effect Effects 0.000 claims abstract description 78
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 16
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 5
- 230000005415 magnetization Effects 0.000 claims description 14
- 230000007423 decrease Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 description 13
- 239000000463 material Substances 0.000 description 13
- 229910000889 permalloy Inorganic materials 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 230000005355 Hall effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
- G01D5/142—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices
- G01D5/147—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. 強磁性物体の位置を検出する装置において、 端部及び軸を有してその軸に垂直な方向の放射状磁界成分を発生させ、その放 射状磁界成分が実効中心をある位置に有してその磁界成分がその実効中心から発 出する磁界発生源と、 前記軸に垂直な平面にあり、かつ前記磁界発生源の端部と前記強磁性物体との 間に、前記放射状磁界成分の前記実効中心の位置が前記強磁性物体の位置によっ て決定されるように介挿され、その実効中心の位置に応答して動作する磁気抵抗 トランスデューサであって、第1のブリッジ分岐、第2のブリッジ分岐及び付加 的ブリッジ構成部品を有し、その第1及び第2のブリッジ分岐はブリッジ回路を 形成するようその付加的ブリッジ構成部品に電気的に接続された少なくとも1本 の磁気抵抗ストリップを各々有し、前記放射状磁界がその少なくとも1本の磁気 抵抗ストリップとの交角を有し、その少なくとも1本の磁気抵抗ストリップが、 平衡ブリッジ条件が得られるように、その少なくとも1本の磁気抵抗ストリップ との交角が所定の値になるよう湾曲しており、その第1及び第2のブリッジ分岐 が、その実効中心に関して対称状に配置されているときその平衡ブリッジ条件が 達成されるようにして内部に配置されており、そのブリッジ回路が、その放射状 磁界成分のその実効中心のその位置を表す出力を発生する磁気抵抗トランスデュ ーサと、 を具備した装置。 2. 前記第1のブリッジ分岐及び前記第2のブリッジ分岐は、各々複数の磁気 抵抗ストリップよりなり、その各ストリップが、互いに隣接ストリップとほぼ平 行に配置され、かつその各ストリップが、互いに隣接ストリップと電気的に接続 されて、その複数のストリップからなる直列ストリングを形成している請求項1 記載の装置。 3. 前記交角が約45度の角度値を有する請求項1記載の装置。 4. 前記交角が約45度の角度値を有する請求項2記載の装置。 5. 前記強磁性物体が歯車の歯であり、前記出力が、その歯車の歯が前記磁界 発生源の軸に向けて移動する際には第1の極性を有し、その歯車の歯がその磁界 発生源の軸から遠ざかる向きに移動する際にはその第1の極性と逆の極性を有す る請求項2記載の装置。 6. 前記磁界発生源が、前記端部にテーパ状部分を有する永久磁石であり、そ のテーパ状部分が、断面が大きい部分からその端部に向けて断面が小さくなる請 求項5記載の装置。 7. 強磁性物体の位置を検出する装置において、 端部及び軸を有してその軸に垂直な方向の放射状磁界成分を発生させるととも に、その放射状磁界成分が実効中心をある位置に有していて、その磁界成分がそ の実効中心から発出する磁界発生源と、 前記放射状磁界成分内にあって、第1の抵抗を有して第1の方向に第1の電流 を流す第1の素子及び第2の抵抗を有して第2の方向に第2の電流を流す第2の 素子を含む磁気抵抗トランスデューサであって、その各素子がその放射状磁界に よって実質的に飽和し、その各素子がその放射状磁界の方向に揃った磁化方向を 有し、その磁化方向とその第1の電流のその方向とが第1の角を形成し、その磁 化方向とその第2の電流のその方向とが第2の角を形成し、前記強磁性物体の前 記位置がその第1の角及びその第2の角を変化させ、前記第1及び第2の素子が 、各々、これらのいずれか一方の素子の抵抗Rが値R0を取り得る場合において 、 R=R0+Δcos2θ で求まる抵抗Rを有する磁気抵抗トランスデューサと、 を具備し、 式中、θは、前記放射状磁界によって生じる前記磁気抵抗素子における磁化ベ クトルとその磁気抵抗素子中の電流の方向との間の角度であり、 ΔRは、前記磁化ベクトルが前記素子と平行な位置からその素子に対して垂直 な位置まで回転する際における抵抗の変化量であり、 R0は、θが90度のときの前記磁気抵抗素子の抵抗値であり、 前記第1及び第2の磁気抵抗素子が、ブリッジ回路を形成するよう付加的ブリ ッジ構成部品に電気的に接続されており、そのブリッジ回路が、前記実効中心の 前記位置、及びその第1の素子における前記角度θの変化並びにその第2の素子 におけるその角度θの変化に関連する出力を有する装置。 8. 前記第1のブリッジ分岐及び前記第2のブリッジ分岐が、各々複数の磁気 抵抗ストリップよりなり、その各ストリップが、互いに隣接ストリップとほぼ平 行に配置され、かつその各ストリップが、互いに隣接ストリップと電気的に接続 されて、その複数のストリップからなる直列ストリングを形成する請求項7記載 の装置。 9. 前記放射状磁界が、前記磁気抵抗ストリップに対してある値の交角を有し 、その磁気抵抗ストリップが、平衡ブリッジ条件が得られるように、その交角が 所定の値となるよう湾曲している請求項8記載の装置。 10. 前記強磁性物体が歯車の歯であり、前記出力が、その歯車の歯が前記磁 界発生源の軸に向けて移動する際には第1の極性を有し、その歯車の歯がその磁 界発生源の軸から遠ざかる向きに移動する際にはその第1の極性と逆の極性を有 する請求項9記載の装置。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/076,511 | 1993-06-14 | ||
US08/076,511 US5351028A (en) | 1993-06-14 | 1993-06-14 | Magnetoresistive proximity sensor |
US076,511 | 1993-06-14 | ||
PCT/US1994/006638 WO1994029672A1 (en) | 1993-06-14 | 1994-06-14 | Magnetoresistive proximity sensor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08511348A true JPH08511348A (ja) | 1996-11-26 |
JP3028377B2 JP3028377B2 (ja) | 2000-04-04 |
Family
ID=22132474
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7502151A Expired - Lifetime JP3028377B2 (ja) | 1993-06-14 | 1994-06-14 | 磁気抵抗近接センサ |
Country Status (5)
Country | Link |
---|---|
US (1) | US5351028A (ja) |
EP (1) | EP0705421B1 (ja) |
JP (1) | JP3028377B2 (ja) |
DE (1) | DE69426599T2 (ja) |
WO (1) | WO1994029672A1 (ja) |
Cited By (19)
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JP2015517657A (ja) * | 2012-05-10 | 2015-06-22 | アレグロ・マイクロシステムズ・エルエルシー | 集積されたコイルを有する磁場センサのための方法及び装置 |
US10012518B2 (en) | 2016-06-08 | 2018-07-03 | Allegro Microsystems, Llc | Magnetic field sensor for sensing a proximity of an object |
US10145908B2 (en) | 2013-07-19 | 2018-12-04 | Allegro Microsystems, Llc | Method and apparatus for magnetic sensor producing a changing magnetic field |
US10310028B2 (en) | 2017-05-26 | 2019-06-04 | Allegro Microsystems, Llc | Coil actuated pressure sensor |
US10324141B2 (en) | 2017-05-26 | 2019-06-18 | Allegro Microsystems, Llc | Packages for coil actuated position sensors |
US10495699B2 (en) | 2013-07-19 | 2019-12-03 | Allegro Microsystems, Llc | Methods and apparatus for magnetic sensor having an integrated coil or magnet to detect a non-ferromagnetic target |
US10641842B2 (en) | 2017-05-26 | 2020-05-05 | Allegro Microsystems, Llc | Targets for coil actuated position sensors |
US10725100B2 (en) | 2013-03-15 | 2020-07-28 | Allegro Microsystems, Llc | Methods and apparatus for magnetic sensor having an externally accessible coil |
US10753769B2 (en) | 2014-10-31 | 2020-08-25 | Allegro Microsystems, Llc | Magnetic field sensor providing a movement detector |
US10823586B2 (en) | 2018-12-26 | 2020-11-03 | Allegro Microsystems, Llc | Magnetic field sensor having unequally spaced magnetic field sensing elements |
US10837943B2 (en) | 2017-05-26 | 2020-11-17 | Allegro Microsystems, Llc | Magnetic field sensor with error calculation |
US10955306B2 (en) | 2019-04-22 | 2021-03-23 | Allegro Microsystems, Llc | Coil actuated pressure sensor and deformable substrate |
US10996289B2 (en) | 2017-05-26 | 2021-05-04 | Allegro Microsystems, Llc | Coil actuated position sensor with reflected magnetic field |
US11061084B2 (en) | 2019-03-07 | 2021-07-13 | Allegro Microsystems, Llc | Coil actuated pressure sensor and deflectable substrate |
US11237020B2 (en) | 2019-11-14 | 2022-02-01 | Allegro Microsystems, Llc | Magnetic field sensor having two rows of magnetic field sensing elements for measuring an angle of rotation of a magnet |
US11280637B2 (en) | 2019-11-14 | 2022-03-22 | Allegro Microsystems, Llc | High performance magnetic angle sensor |
US11428755B2 (en) | 2017-05-26 | 2022-08-30 | Allegro Microsystems, Llc | Coil actuated sensor with sensitivity detection |
US11493361B2 (en) | 2021-02-26 | 2022-11-08 | Allegro Microsystems, Llc | Stray field immune coil-activated sensor |
US11578997B1 (en) | 2021-08-24 | 2023-02-14 | Allegro Microsystems, Llc | Angle sensor using eddy currents |
Families Citing this family (30)
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US5644226A (en) * | 1994-03-02 | 1997-07-01 | Nippondenso Co., Ltd. | Magnetic detector having a bias magnet and magnetoresistive elements shifted away from the center of the magnet |
US5589769A (en) * | 1994-09-30 | 1996-12-31 | Honeywell Inc. | Position detection apparatus including a circuit for receiving a plurality of output signal values and fitting the output signal values to a curve |
US5488294A (en) * | 1995-01-18 | 1996-01-30 | Honeywell Inc. | Magnetic sensor with means for retaining a magnet at a precise calibrated position |
JP2982638B2 (ja) * | 1995-01-19 | 1999-11-29 | 株式会社デンソー | 変位検出装置 |
US6222361B1 (en) * | 1997-12-04 | 2001-04-24 | Sony Precision Technology Inc. | Position detecting device using varying width magneto-resistive effect sensor |
JPH11281690A (ja) * | 1998-03-30 | 1999-10-15 | Mitsubishi Electric Corp | パルス幅検証装置及びパルス幅検証方法 |
US6097183A (en) * | 1998-04-14 | 2000-08-01 | Honeywell International Inc. | Position detection apparatus with correction for non-linear sensor regions |
DE10014780B4 (de) * | 2000-03-27 | 2009-07-30 | Philips Intellectual Property & Standards Gmbh | MR-Winkelsensor |
DE10014779B4 (de) * | 2000-03-27 | 2011-11-10 | Nxp B.V. | MR-Winkelsensor |
US6201466B1 (en) * | 2000-03-29 | 2001-03-13 | Delphi Technologies, Inc. | Magnetoresistor array |
US6833697B2 (en) * | 2002-09-11 | 2004-12-21 | Honeywell International Inc. | Saturated magnetoresistive approach for linear position sensing |
US6992479B2 (en) * | 2003-01-31 | 2006-01-31 | Delphi Technologies, Inc. | Magnetic sensor array configuration for measuring a position and method of operating same |
US20050052898A1 (en) * | 2003-09-05 | 2005-03-10 | Arntson Paul R. | Apparatus and methods for magnetic through-skin sensing |
DE602004024123D1 (de) * | 2003-12-04 | 2009-12-24 | Nxp Bv | Magnetfeldempfindliche sensoranordnung |
US7141964B2 (en) * | 2004-01-06 | 2006-11-28 | Honeywell International Inc. | Adaptive integrated circuit for magnetoresistive sensors |
US7126330B2 (en) * | 2004-06-03 | 2006-10-24 | Honeywell International, Inc. | Integrated three-dimensional magnetic sensing device and method to fabricate an integrated three-dimensional magnetic sensing device |
US7112957B2 (en) * | 2004-06-16 | 2006-09-26 | Honeywell International Inc. | GMR sensor with flux concentrators |
US7075416B2 (en) * | 2004-06-21 | 2006-07-11 | Honeywell International Inc. | Automotive universal latch control implementation |
US7425824B2 (en) * | 2005-05-20 | 2008-09-16 | Honeywell International Inc. | Magnetoresistive sensor |
US20070274695A1 (en) * | 2006-05-26 | 2007-11-29 | John Phillip Chevalier | Automotive universal latch control implementation |
DE102006050833B4 (de) * | 2006-10-27 | 2011-04-07 | Infineon Technologies Ag | Magnetoresistives Sensorelement und ein Verfahren zu dessen Herstellung, sowie dessen Verwendung und eine Sensoranordnung |
US10852367B2 (en) | 2007-05-30 | 2020-12-01 | Infineon Technologies Ag | Magnetic-field sensor with a back-bias magnet |
US10338158B2 (en) | 2007-05-30 | 2019-07-02 | Infineon Technologies Ag | Bias magnetic field sensor |
DE102007025000B3 (de) | 2007-05-30 | 2008-12-11 | Infineon Technologies Ag | Magnetfeldsensor |
US20090315554A1 (en) * | 2008-06-20 | 2009-12-24 | Honeywell International Inc. | Integrated three-dimensional magnetic sensing device and method to fabricate an integrated three-dimensional magnetic sensing device |
US8203332B2 (en) * | 2008-06-24 | 2012-06-19 | Magic Technologies, Inc. | Gear tooth sensor (GTS) with magnetoresistive bridge |
WO2011095179A1 (en) * | 2010-02-02 | 2011-08-11 | Aktiebolaget Skf | Kinematic-state encoder with magnetic sensor and target object |
US8947082B2 (en) * | 2011-10-21 | 2015-02-03 | University College Cork, National University Of Ireland | Dual-axis anisotropic magnetoresistive sensors |
US10550958B2 (en) | 2017-02-16 | 2020-02-04 | Honeywell International Inc. | Housing cover sealing detection means on a valve control head |
US11262422B2 (en) | 2020-05-08 | 2022-03-01 | Allegro Microsystems, Llc | Stray-field-immune coil-activated position sensor |
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EP0057766A3 (en) * | 1981-02-07 | 1984-07-18 | Hitachi, Ltd. | Magnetoelectrical transducer |
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-
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- 1993-06-14 US US08/076,511 patent/US5351028A/en not_active Expired - Lifetime
-
1994
- 1994-06-14 EP EP94920172A patent/EP0705421B1/en not_active Expired - Lifetime
- 1994-06-14 JP JP7502151A patent/JP3028377B2/ja not_active Expired - Lifetime
- 1994-06-14 DE DE69426599T patent/DE69426599T2/de not_active Expired - Lifetime
- 1994-06-14 WO PCT/US1994/006638 patent/WO1994029672A1/en active IP Right Grant
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JP2015517657A (ja) * | 2012-05-10 | 2015-06-22 | アレグロ・マイクロシステムズ・エルエルシー | 集積されたコイルを有する磁場センサのための方法及び装置 |
US10725100B2 (en) | 2013-03-15 | 2020-07-28 | Allegro Microsystems, Llc | Methods and apparatus for magnetic sensor having an externally accessible coil |
US10145908B2 (en) | 2013-07-19 | 2018-12-04 | Allegro Microsystems, Llc | Method and apparatus for magnetic sensor producing a changing magnetic field |
US11313924B2 (en) | 2013-07-19 | 2022-04-26 | Allegro Microsystems, Llc | Method and apparatus for magnetic sensor producing a changing magnetic field |
US10495699B2 (en) | 2013-07-19 | 2019-12-03 | Allegro Microsystems, Llc | Methods and apparatus for magnetic sensor having an integrated coil or magnet to detect a non-ferromagnetic target |
US10670672B2 (en) | 2013-07-19 | 2020-06-02 | Allegro Microsystems, Llc | Method and apparatus for magnetic sensor producing a changing magnetic field |
US10753769B2 (en) | 2014-10-31 | 2020-08-25 | Allegro Microsystems, Llc | Magnetic field sensor providing a movement detector |
US11307054B2 (en) | 2014-10-31 | 2022-04-19 | Allegro Microsystems, Llc | Magnetic field sensor providing a movement detector |
US10012518B2 (en) | 2016-06-08 | 2018-07-03 | Allegro Microsystems, Llc | Magnetic field sensor for sensing a proximity of an object |
US10641842B2 (en) | 2017-05-26 | 2020-05-05 | Allegro Microsystems, Llc | Targets for coil actuated position sensors |
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US10837943B2 (en) | 2017-05-26 | 2020-11-17 | Allegro Microsystems, Llc | Magnetic field sensor with error calculation |
US11768256B2 (en) | 2017-05-26 | 2023-09-26 | Allegro Microsystems, Llc | Coil actuated sensor with sensitivity detection |
US10996289B2 (en) | 2017-05-26 | 2021-05-04 | Allegro Microsystems, Llc | Coil actuated position sensor with reflected magnetic field |
US11073573B2 (en) | 2017-05-26 | 2021-07-27 | Allegro Microsystems, Llc | Packages for coil actuated position sensors |
US10310028B2 (en) | 2017-05-26 | 2019-06-04 | Allegro Microsystems, Llc | Coil actuated pressure sensor |
US11428755B2 (en) | 2017-05-26 | 2022-08-30 | Allegro Microsystems, Llc | Coil actuated sensor with sensitivity detection |
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US10324141B2 (en) | 2017-05-26 | 2019-06-18 | Allegro Microsystems, Llc | Packages for coil actuated position sensors |
US10823586B2 (en) | 2018-12-26 | 2020-11-03 | Allegro Microsystems, Llc | Magnetic field sensor having unequally spaced magnetic field sensing elements |
US11061084B2 (en) | 2019-03-07 | 2021-07-13 | Allegro Microsystems, Llc | Coil actuated pressure sensor and deflectable substrate |
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Also Published As
Publication number | Publication date |
---|---|
EP0705421A1 (en) | 1996-04-10 |
JP3028377B2 (ja) | 2000-04-04 |
DE69426599D1 (de) | 2001-02-22 |
DE69426599T2 (de) | 2001-05-31 |
EP0705421B1 (en) | 2001-01-17 |
US5351028A (en) | 1994-09-27 |
WO1994029672A1 (en) | 1994-12-22 |
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