WO2009060716A1 - Position detector and positioning device - Google Patents

Position detector and positioning device Download PDF

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Publication number
WO2009060716A1
WO2009060716A1 PCT/JP2008/069093 JP2008069093W WO2009060716A1 WO 2009060716 A1 WO2009060716 A1 WO 2009060716A1 JP 2008069093 W JP2008069093 W JP 2008069093W WO 2009060716 A1 WO2009060716 A1 WO 2009060716A1
Authority
WO
WIPO (PCT)
Prior art keywords
magnetized portions
movable direction
magnetized
magnetic field
portions
Prior art date
Application number
PCT/JP2008/069093
Other languages
French (fr)
Japanese (ja)
Inventor
So Yano
Hideo Maeda
Original Assignee
Konica Minolta Opto, Inc.
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 Konica Minolta Opto, Inc. filed Critical Konica Minolta Opto, Inc.
Priority to JP2009540004A priority Critical patent/JP5218418B2/en
Publication of WO2009060716A1 publication Critical patent/WO2009060716A1/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

A position detector comprising a magnetic field generating member (11) having three or more magnetized portions (13a, 13b, 13c, 13d), which have been alternately magnetized into north and south poles at a given length, the magnetized portions being disposed side by side along a movable direction (x), with non-magnetized portions 14 being interposed between the respective magnetized portions, and magnetic field detecting means (12) having two magnetic field detecting elements (15a, 15b), wherein, in a case that there are four or more of the magnetized portions, the magnetized portions (13b, 13c) located other than the ends in the movable directions have a given length (Wg) in the movable direction (x), the non-magnetized portions (14) have a given length (Wn) in the movable direction (x), and the magnetized portions (13a, 13d) located on the both ends in the movable direction (x) have a length (Wc), which is equal to or greater than 0.8(Wg) and less than (Wg), in the movable direction (x), thereby allowing changes in the magnetic fields generated by the magnetized portions (13a, 13d) at the both ends to be approximately symmetrical for the peak positions of the magnetic fields in backward and forward of the movable direction (x), so that the linearity can be improved.
PCT/JP2008/069093 2007-11-06 2008-10-22 Position detector and positioning device WO2009060716A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009540004A JP5218418B2 (en) 2007-11-06 2008-10-22 Position detector and positioning device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007288173 2007-11-06
JP2007-288173 2007-11-06

Publications (1)

Publication Number Publication Date
WO2009060716A1 true WO2009060716A1 (en) 2009-05-14

Family

ID=40625616

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/069093 WO2009060716A1 (en) 2007-11-06 2008-10-22 Position detector and positioning device

Country Status (2)

Country Link
JP (1) JP5218418B2 (en)
WO (1) WO2009060716A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015023401A1 (en) * 2013-08-15 2015-02-19 Allegro Microsystems, Llc Method and apparatus for determining linear position using multiple magnetic field sensors
EP3270176A1 (en) * 2016-07-14 2018-01-17 Ricoh Company, Ltd. Position detection system, position detection method, image generation unit, and image projection apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI443829B (en) 2010-04-16 2014-07-01 Ind Tech Res Inst Transistor and method of favricating the same
DE112014006465B4 (en) 2014-03-14 2022-03-03 Mitsubishi Electric Corporation Magnetic position sensing device and magnetic position sensing method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172220A (en) * 1990-11-05 1992-06-19 Teijin Seiki Co Ltd Manufacture of magnetic scale
JPH116744A (en) * 1997-06-16 1999-01-12 Sankyo Seiki Mfg Co Ltd Encoder device
JP2003524778A (en) * 2000-01-13 2003-08-19 コンティネンタル・テーベス・アクチエンゲゼルシヤフト・ウント・コンパニー・オッフェネ・ハンデルスゲゼルシヤフト Linear displacement sensor and its use as a vehicle operating device
JP2006292396A (en) * 2005-04-06 2006-10-26 Konica Minolta Opto Inc Position detector and positioning apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04172220A (en) * 1990-11-05 1992-06-19 Teijin Seiki Co Ltd Manufacture of magnetic scale
JPH116744A (en) * 1997-06-16 1999-01-12 Sankyo Seiki Mfg Co Ltd Encoder device
JP2003524778A (en) * 2000-01-13 2003-08-19 コンティネンタル・テーベス・アクチエンゲゼルシヤフト・ウント・コンパニー・オッフェネ・ハンデルスゲゼルシヤフト Linear displacement sensor and its use as a vehicle operating device
JP2006292396A (en) * 2005-04-06 2006-10-26 Konica Minolta Opto Inc Position detector and positioning apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015023401A1 (en) * 2013-08-15 2015-02-19 Allegro Microsystems, Llc Method and apparatus for determining linear position using multiple magnetic field sensors
US9042716B2 (en) 2013-08-15 2015-05-26 Allegro Microsystems, Llc Method and apparatus for determining linear position using multiple magnetic field sensors
EP3270176A1 (en) * 2016-07-14 2018-01-17 Ricoh Company, Ltd. Position detection system, position detection method, image generation unit, and image projection apparatus

Also Published As

Publication number Publication date
JP5218418B2 (en) 2013-06-26
JPWO2009060716A1 (en) 2011-03-24

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