WO2009051069A1 - Gmr sensor - Google Patents

Gmr sensor Download PDF

Info

Publication number
WO2009051069A1
WO2009051069A1 PCT/JP2008/068435 JP2008068435W WO2009051069A1 WO 2009051069 A1 WO2009051069 A1 WO 2009051069A1 JP 2008068435 W JP2008068435 W JP 2008068435W WO 2009051069 A1 WO2009051069 A1 WO 2009051069A1
Authority
WO
WIPO (PCT)
Prior art keywords
gmr
divided
element portions
disposed
absolute value
Prior art date
Application number
PCT/JP2008/068435
Other languages
French (fr)
Japanese (ja)
Inventor
Makito Takigawa
Ken Kawabata
Tomoki Ogawa
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.
Priority to JP2009538075A priority Critical patent/JP4861483B2/en
Publication of WO2009051069A1 publication Critical patent/WO2009051069A1/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
    • G01D5/2451—Incremental encoders
    • 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

Abstract

There is provided a GMR sensor having a detection accuracy with high resolution appropriately obtained by preventing the effect of noise from the outside and a problem caused by a poor electrical signal. The GMR sensor comprises a bridge circuit (20) having first to fourth GMR elements, a differential amplifier (30) for detecting a differential amount between the output signals of first and second output terminals, which occurs along with the movement of a magnet disposed opposing to the bridge circuit (20), and an absolute value converter (40) for converting the detected differential amount to an absolute value. Element portions into which the first GMR element is divided and element portions into which the third GMR element is divided are alternately disposed in a line to make a first GMR unit. Element portions into which the second GMR element is divided and element portions into which the fourth GMR element is divided are alternately disposed in a line to make a second GMR unit. The first and second GMR units are disposed in a direction orthogonal to the movement direction of the magnet.
PCT/JP2008/068435 2007-10-15 2008-10-10 Gmr sensor WO2009051069A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009538075A JP4861483B2 (en) 2007-10-15 2008-10-10 GMR sensor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-267759 2007-10-15
JP2007267759 2007-10-15

Publications (1)

Publication Number Publication Date
WO2009051069A1 true WO2009051069A1 (en) 2009-04-23

Family

ID=40567336

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/068435 WO2009051069A1 (en) 2007-10-15 2008-10-10 Gmr sensor

Country Status (2)

Country Link
JP (1) JP4861483B2 (en)
WO (1) WO2009051069A1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010281767A (en) * 2009-06-08 2010-12-16 Alps Electric Co Ltd Sensor element and magnetic sensor
WO2010150725A1 (en) * 2009-06-24 2010-12-29 アルプス電気株式会社 Magnetic detection device
DE102013104783A1 (en) 2012-05-10 2013-11-14 Alps Electric Co., Ltd. Magnetic detection device and magnetic encoder
EP2722649A2 (en) 2012-10-17 2014-04-23 Alps Electric Co., Ltd. Magnetic encoder

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103267955B (en) * 2013-05-28 2016-07-27 江苏多维科技有限公司 Single-chip bridge-type magnetic field sensor

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146720U (en) * 1983-03-23 1984-10-01 フアナツク株式会社 magnetic pulse encoder
JPS6288914U (en) * 1985-11-22 1987-06-06
JPH10221004A (en) * 1997-01-31 1998-08-21 Mitsutoyo Corp Displacement measuring device
JP2007121253A (en) * 2005-09-30 2007-05-17 Hitachi Metals Ltd Magnetic encoder

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146720A (en) * 1983-02-05 1984-08-22 Nissan Motor Co Ltd Supporting unit of fastener tightening device in industrial robot
JPS6288914A (en) * 1985-10-16 1987-04-23 Nec Corp Altitude measuring equipment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59146720U (en) * 1983-03-23 1984-10-01 フアナツク株式会社 magnetic pulse encoder
JPS6288914U (en) * 1985-11-22 1987-06-06
JPH10221004A (en) * 1997-01-31 1998-08-21 Mitsutoyo Corp Displacement measuring device
JP2007121253A (en) * 2005-09-30 2007-05-17 Hitachi Metals Ltd Magnetic encoder

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010281767A (en) * 2009-06-08 2010-12-16 Alps Electric Co Ltd Sensor element and magnetic sensor
WO2010150725A1 (en) * 2009-06-24 2010-12-29 アルプス電気株式会社 Magnetic detection device
JP5066628B2 (en) * 2009-06-24 2012-11-07 アルプス電気株式会社 Magnetic detector
DE102013104783A1 (en) 2012-05-10 2013-11-14 Alps Electric Co., Ltd. Magnetic detection device and magnetic encoder
DE102013104783B4 (en) * 2012-05-10 2014-07-31 Alps Electric Co., Ltd. Magnetic detection device and magnetic encoder
EP2722649A2 (en) 2012-10-17 2014-04-23 Alps Electric Co., Ltd. Magnetic encoder
JP2014081298A (en) * 2012-10-17 2014-05-08 Alps Electric Co Ltd Magnetic encoder

Also Published As

Publication number Publication date
JPWO2009051069A1 (en) 2011-03-03
JP4861483B2 (en) 2012-01-25

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