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WO2009038161A1 - Origin detection device - Google Patents

Origin detection device Download PDF

Info

Publication number
WO2009038161A1
WO2009038161A1 PCT/JP2008/066959 JP2008066959W WO2009038161A1 WO 2009038161 A1 WO2009038161 A1 WO 2009038161A1 JP 2008066959 W JP2008066959 W JP 2008066959W WO 2009038161 A1 WO2009038161 A1 WO 2009038161A1
Authority
WO
WIPO (PCT)
Prior art keywords
origin
differential output
free magnetic
detection device
magneto
Prior art date
Application number
PCT/JP2008/066959
Other languages
French (fr)
Japanese (ja)
Inventor
Masahiko Sato
Yoshito Sasaki
Takafumi Noguchi
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 WO2009038161A1 publication Critical patent/WO2009038161A1/en

Links

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
    • G01D5/244—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 characteristics of pulses or pulse trains; generating pulses or pulse trains
    • G01D5/245—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 characteristics of pulses or pulse trains; generating pulses or pulse trains using a variable number of pulses in a train
    • G01D5/2454—Encoders incorporating incremental and absolute signals
    • G01D5/2455—Encoders incorporating incremental and absolute signals with incremental and absolute tracks on the same encoder
    • G01D5/2457—Incremental encoders having reference marks

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

[PROBLEMS] To provide an origin detection device capable of detecting an origin more accurately than in a conventional device by using magneto-resistive devices having fixed magnetic layers and free magnetic layers. [MEANS FOR SOLVING PROBLEMS] When the center (1c) of a magnet (1) is at the origin (P), a horizontal magnetic field component (H1) acts on the free magnetic layer of each magneto-resistive device to turn the free magnetic layer in the direction of the horizontal magnetic field. This stabilizes magnetization to make hysteresis sufficiently small to accurately detect the origin. When the center (1c) of the magnet (1) is positioned at the origin (P), no differential output is obtained otherwise, though differential output occurs and the origin can be detected by judging the existence of the differential output. This makes it possible to accurately detect the origin by a simple circuit not requiring a reference voltage setting circuit or the like.
PCT/JP2008/066959 2007-09-20 2008-09-19 Origin detection device WO2009038161A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-243933 2007-09-20
JP2007243933A JP2010286236A (en) 2007-09-20 2007-09-20 Origin detection device

Publications (1)

Publication Number Publication Date
WO2009038161A1 true WO2009038161A1 (en) 2009-03-26

Family

ID=40467970

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/066959 WO2009038161A1 (en) 2007-09-20 2008-09-19 Origin detection device

Country Status (2)

Country Link
JP (1) JP2010286236A (en)
WO (1) WO2009038161A1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9034865B2 (en) 2010-02-18 2015-05-19 Medivation Technologies, Inc. Pyrido [4,3-B] indole and pyrido [3,4-B] indole derivatives and methods of use
US9040519B2 (en) 2010-02-18 2015-05-26 Medivation Technologies, Inc. Fused tetracyclic pyrido [4,3-B] indole and pyrido [3,4-B] indole derivatives and methods of use
US9193728B2 (en) 2010-02-18 2015-11-24 Medivation Technologies, Inc. Fused tetracyclic pyrido [4,3-B] indole and pyrido [3,4-B] indole derivatives and methods of use
US9434747B2 (en) 2011-02-18 2016-09-06 Medivation Technologies, Inc. Methods of treating diabetes
CN107037381A (en) * 2015-12-29 2017-08-11 爱盛科技股份有限公司 Magnetic field sensing device and sensing method thereof
WO2018193961A1 (en) * 2017-04-18 2018-10-25 アルプス電気株式会社 Rotation angle detecting device
DE112014003316B4 (en) 2013-07-17 2019-07-11 Denso Corporation rotation sensor
CN111656208A (en) * 2018-03-22 2020-09-11 株式会社东海理化电机制作所 Magnetic sensor
CN113960508A (en) * 2020-07-21 2022-01-21 Tdk株式会社 Magnetic sensor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6986002B2 (en) * 2018-11-26 2021-12-22 Tdk株式会社 Magnetic sensor device
CN109975861B (en) * 2019-04-18 2024-05-31 国仪量子(合肥)技术有限公司 Magnetic spectrometer magnet debugging device and optical detection magnetic resonance magnetic spectrometer
JP7339088B2 (en) * 2019-09-13 2023-09-05 ニデックインスツルメンツ株式会社 OPTICAL UNIT WITH STABILIZATION CORRECTION FUNCTION AND INSPECTION METHOD THEREOF

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05175483A (en) * 1991-12-24 1993-07-13 Asahi Chem Ind Co Ltd Positional sensor
JP2006153720A (en) * 2004-11-30 2006-06-15 Tdk Corp Rotation angle detector
JP2007220367A (en) * 2006-02-14 2007-08-30 Alps Electric Co Ltd Magnetic switch

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05175483A (en) * 1991-12-24 1993-07-13 Asahi Chem Ind Co Ltd Positional sensor
JP2006153720A (en) * 2004-11-30 2006-06-15 Tdk Corp Rotation angle detector
JP2007220367A (en) * 2006-02-14 2007-08-30 Alps Electric Co Ltd Magnetic switch

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9034865B2 (en) 2010-02-18 2015-05-19 Medivation Technologies, Inc. Pyrido [4,3-B] indole and pyrido [3,4-B] indole derivatives and methods of use
US9040519B2 (en) 2010-02-18 2015-05-26 Medivation Technologies, Inc. Fused tetracyclic pyrido [4,3-B] indole and pyrido [3,4-B] indole derivatives and methods of use
US9193728B2 (en) 2010-02-18 2015-11-24 Medivation Technologies, Inc. Fused tetracyclic pyrido [4,3-B] indole and pyrido [3,4-B] indole derivatives and methods of use
US9433626B2 (en) 2010-02-18 2016-09-06 Medivation Technologies, Inc. Pyrido[4,3-B]indole and pyrido[3,4-B]indole derivatives and methods of use
US9434747B2 (en) 2011-02-18 2016-09-06 Medivation Technologies, Inc. Methods of treating diabetes
DE112014003316B4 (en) 2013-07-17 2019-07-11 Denso Corporation rotation sensor
CN107037381A (en) * 2015-12-29 2017-08-11 爱盛科技股份有限公司 Magnetic field sensing device and sensing method thereof
WO2018193961A1 (en) * 2017-04-18 2018-10-25 アルプス電気株式会社 Rotation angle detecting device
CN111656208A (en) * 2018-03-22 2020-09-11 株式会社东海理化电机制作所 Magnetic sensor
CN113960508A (en) * 2020-07-21 2022-01-21 Tdk株式会社 Magnetic sensor
CN113960508B (en) * 2020-07-21 2024-05-24 Tdk株式会社 Magnetic Sensor

Also Published As

Publication number Publication date
JP2010286236A (en) 2010-12-24

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