WO2009044840A1 - 磁気検出装置 - Google Patents

磁気検出装置 Download PDF

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Publication number
WO2009044840A1
WO2009044840A1 PCT/JP2008/068016 JP2008068016W WO2009044840A1 WO 2009044840 A1 WO2009044840 A1 WO 2009044840A1 JP 2008068016 W JP2008068016 W JP 2008068016W WO 2009044840 A1 WO2009044840 A1 WO 2009044840A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetoresistance effect
effect elements
magnetic sensor
output waveform
top surface
Prior art date
Application number
PCT/JP2008/068016
Other languages
English (en)
French (fr)
Inventor
Masahiko Sato
Original Assignee
Alps Electric 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 Alps Electric Co., Ltd. filed Critical Alps Electric Co., Ltd.
Publication of WO2009044840A1 publication Critical patent/WO2009044840A1/ja

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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
    • G01D5/145—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 relative movement between the Hall device and magnetic fields
    • 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
    • G01D2205/00—Indexing scheme relating to details of means for transferring or converting the output of a sensing member
    • G01D2205/80—Manufacturing details of magnetic targets for magnetic encoders

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Hall/Mr Elements (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measuring Magnetic Variables (AREA)

Abstract

【課題】　特に、出力波形の安定化を図ることができるともに、略三角波の出力波形を得ることが可能な磁気検出装置を提供することを目的としている。 【解決手段】　磁気抵抗効果素子２４ａ～２４ｈを搭載した磁気センサ２２は、磁石２１の上面（着磁面）２１ａの上方に位置するとともに、前記上面（着磁面）２１ａの幅方向の中心ＣＬから側縁部２１ａ１方向にずらして配置されている。これにより、相対移動する各磁気抵抗効果素子に対して無磁場状態が形成されずに、回転磁場が作用するため、安定した出力を得ることが可能になる。また、出力値をさほど低下させることなく略三角波の出力波形を得ることが可能である。さらに前記磁気抵抗効果素子を構成する固定磁性層の磁化方向を全て同一方向に固定している。よって、各磁気抵抗効果素子を同じ製造工程で製造できる等、磁気センサの製造を容易化することが可能である。
PCT/JP2008/068016 2007-10-05 2008-10-03 磁気検出装置 WO2009044840A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007261693A JP2010286238A (ja) 2007-10-05 2007-10-05 磁気検出装置
JP2007-261693 2007-10-05

Publications (1)

Publication Number Publication Date
WO2009044840A1 true WO2009044840A1 (ja) 2009-04-09

Family

ID=40526263

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/068016 WO2009044840A1 (ja) 2007-10-05 2008-10-03 磁気検出装置

Country Status (2)

Country Link
JP (1) JP2010286238A (ja)
WO (1) WO2009044840A1 (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013161027A1 (ja) * 2012-04-26 2013-10-31 三菱電機株式会社 磁気式位置検出装置
EP2865997A1 (en) * 2013-10-28 2015-04-29 Hitachi Metals, Ltd. Magnetic medium for magnetic encoder, magnetic encoder and method for manufacturing magnetic medium
JP2015190882A (ja) * 2014-03-28 2015-11-02 Dmg森精機株式会社 位置検出装置
WO2018193961A1 (ja) * 2017-04-18 2018-10-25 アルプス電気株式会社 回転角度検出装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5718631B2 (ja) 2010-12-22 2015-05-13 矢崎総業株式会社 電子部品の接続構造
US10866117B2 (en) * 2018-03-01 2020-12-15 Allegro Microsystems, Llc Magnetic field influence during rotation movement of magnetic target
JP2019219311A (ja) * 2018-06-21 2019-12-26 株式会社デンソー リニアポジションセンサ

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007192778A (ja) * 2006-01-23 2007-08-02 Tokai Rika Co Ltd 回転角度検出装置
JP2007199007A (ja) * 2006-01-30 2007-08-09 Alps Electric Co Ltd 磁気エンコーダ
JP2007220367A (ja) * 2006-02-14 2007-08-30 Alps Electric Co Ltd 磁気スイッチ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007192778A (ja) * 2006-01-23 2007-08-02 Tokai Rika Co Ltd 回転角度検出装置
JP2007199007A (ja) * 2006-01-30 2007-08-09 Alps Electric Co Ltd 磁気エンコーダ
JP2007220367A (ja) * 2006-02-14 2007-08-30 Alps Electric Co Ltd 磁気スイッチ

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013161027A1 (ja) * 2012-04-26 2013-10-31 三菱電機株式会社 磁気式位置検出装置
CN104246445A (zh) * 2012-04-26 2014-12-24 三菱电机株式会社 磁式位置检测装置
CN104246445B (zh) * 2012-04-26 2016-04-13 三菱电机株式会社 磁式位置检测装置
EP2865997A1 (en) * 2013-10-28 2015-04-29 Hitachi Metals, Ltd. Magnetic medium for magnetic encoder, magnetic encoder and method for manufacturing magnetic medium
US9574906B2 (en) 2013-10-28 2017-02-21 Hitachi Metals, Ltd. Magnetic medium for magnetic encoder, magnetic encoder and method for manufacturing magnetic medium
JP2015190882A (ja) * 2014-03-28 2015-11-02 Dmg森精機株式会社 位置検出装置
WO2018193961A1 (ja) * 2017-04-18 2018-10-25 アルプス電気株式会社 回転角度検出装置

Also Published As

Publication number Publication date
JP2010286238A (ja) 2010-12-24

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