JPH0514205B2 - - Google Patents

Info

Publication number
JPH0514205B2
JPH0514205B2 JP57216899A JP21689982A JPH0514205B2 JP H0514205 B2 JPH0514205 B2 JP H0514205B2 JP 57216899 A JP57216899 A JP 57216899A JP 21689982 A JP21689982 A JP 21689982A JP H0514205 B2 JPH0514205 B2 JP H0514205B2
Authority
JP
Japan
Prior art keywords
magnetic
track
magnetization
magnetic recording
magnetized
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.)
Expired - Lifetime
Application number
JP57216899A
Other languages
English (en)
Japanese (ja)
Other versions
JPS59108193A (ja
Inventor
Tadashi Takahashi
Kunio Myashita
Shoichi Kawamata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP57216899A priority Critical patent/JPS59108193A/ja
Priority to KR1019830005797A priority patent/KR840007285A/ko
Priority to EP83112483A priority patent/EP0111866B1/en
Priority to DE8383112483T priority patent/DE3382275D1/de
Publication of JPS59108193A publication Critical patent/JPS59108193A/ja
Priority to US07/253,333 priority patent/US4904937A/en
Publication of JPH0514205B2 publication Critical patent/JPH0514205B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/12—Analogue/digital converters
    • H03M1/22—Analogue/digital converters pattern-reading type
    • H03M1/24—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip
    • H03M1/28—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding
    • H03M1/285—Analogue/digital converters pattern-reading type using relatively movable reader and disc or strip with non-weighted coding of the unit Hamming distance type, e.g. Gray code
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/06—Continuously compensating for, or preventing, undesired influence of physical parameters
    • H03M1/0617—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence
    • H03M1/0675—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy
    • H03M1/0678—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy using additional components or elements, e.g. dummy components
    • H03M1/068—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy using additional components or elements, e.g. dummy components the original and additional components or elements being complementary to each other, e.g. CMOS
    • H03M1/0685—Continuously compensating for, or preventing, undesired influence of physical parameters characterised by the use of methods or means not specific to a particular type of detrimental influence using redundancy using additional components or elements, e.g. dummy components the original and additional components or elements being complementary to each other, e.g. CMOS using real and complementary patterns

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Analogue/Digital Conversion (AREA)
JP57216899A 1982-12-13 1982-12-13 磁気的に位置を検出する装置 Granted JPS59108193A (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP57216899A JPS59108193A (ja) 1982-12-13 1982-12-13 磁気的に位置を検出する装置
KR1019830005797A KR840007285A (ko) 1982-12-13 1983-12-07 자기적(磁氣的)으로 위치를 검출하는 장치
EP83112483A EP0111866B1 (en) 1982-12-13 1983-12-12 Apparatus for magnetically detecting positions
DE8383112483T DE3382275D1 (de) 1982-12-13 1983-12-12 Geraet zur erkennung von positionen auf magnetische weise.
US07/253,333 US4904937A (en) 1982-12-13 1988-10-03 Apparatus for magnetically detecting positions with minimum length magnetic information units recorded on a plurality of magnetic tracks

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57216899A JPS59108193A (ja) 1982-12-13 1982-12-13 磁気的に位置を検出する装置

Related Child Applications (3)

Application Number Title Priority Date Filing Date
JP9794985A Division JPS6117001A (ja) 1985-05-10 1985-05-10 磁気的に位置を検出する装置
JP60097950A Division JPS6117002A (ja) 1985-05-10 1985-05-10 磁気的に位置を検出する装置
JP9795185A Division JPS6122205A (ja) 1985-05-10 1985-05-10 磁気的に位置を検出する装置

Publications (2)

Publication Number Publication Date
JPS59108193A JPS59108193A (ja) 1984-06-22
JPH0514205B2 true JPH0514205B2 (en]) 1993-02-24

Family

ID=16695652

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57216899A Granted JPS59108193A (ja) 1982-12-13 1982-12-13 磁気的に位置を検出する装置

Country Status (5)

Country Link
US (1) US4904937A (en])
EP (1) EP0111866B1 (en])
JP (1) JPS59108193A (en])
KR (1) KR840007285A (en])
DE (1) DE3382275D1 (en])

Families Citing this family (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6122205A (ja) * 1985-05-10 1986-01-30 Hitachi Ltd 磁気的に位置を検出する装置
JPS6234302A (ja) * 1985-08-08 1987-02-14 Canon Electronics Inc エンコ−ダ装置
JPH0660824B2 (ja) * 1985-08-14 1994-08-10 株式会社日立製作所 絶対位置検出装置
JPH0638047B2 (ja) * 1985-10-09 1994-05-18 株式会社日立製作所 磁気的に位置を検出する装置
JPS62168019A (ja) * 1986-01-20 1987-07-24 Hitachi Ltd 磁気式回転センサ
JPH0622333B2 (ja) * 1986-05-14 1994-03-23 株式会社安川電機 絶対位置検出用パルスエンコ−ダ
JP2527424B2 (ja) * 1986-06-14 1996-08-21 キヤノン電子株式会社 磁気ロ−タリ−エンコ−ダ
JPH0621796B2 (ja) * 1987-07-10 1994-03-23 株式会社サンエテック ロータリーエンコーダ
JPS6474411A (en) * 1987-09-16 1989-03-20 Yamaha Corp Position detector
JPH01318920A (ja) * 1988-06-21 1989-12-25 Nikon Corp アブソリュートエンコーダ
JPH0214018U (en]) * 1988-07-11 1990-01-29
DE4030450A1 (de) * 1990-09-26 1992-04-02 Siemens Ag Dreh- oder linearpositionsgeber
JP3259316B2 (ja) * 1992-02-07 2002-02-25 ソニー株式会社 位置検出装置、レンズ装置、ビデオカメラ
EP0555961B1 (en) * 1992-02-13 1997-07-16 Japan Servo Co. Ltd. Absolute encoder
DE4208918A1 (de) * 1992-03-20 1993-09-23 Siemens Ag Dreh- oder linearpositionsgebereinrichtung fuer ein bewegliches geraeteteil
DE4344494C2 (de) * 1993-12-24 1997-04-30 Kodak Ag Verfahren und Vorrichtung zur Vermessung einer Achsdrehbewegung
US5757180A (en) * 1994-11-29 1998-05-26 Industrial Technology Research Institute Disk type of absolute-position magnetic encoder for rotary devices
JP2607868B2 (ja) * 1995-11-06 1997-05-07 キヤノン電子株式会社 磁気ロータリーエンコーダ
US5731702A (en) * 1996-08-21 1998-03-24 General Motors Corporation High accuracy angle based rotation sensor with time based back up
EP1620702B1 (en) * 2003-05-06 2013-07-10 SRI International Hydraulic cylinder with piston and a magnetic layer on the piston rod for piston position determination
US7259553B2 (en) * 2005-04-13 2007-08-21 Sri International System and method of magnetically sensing position of a moving component
WO2009003186A1 (en) 2007-06-27 2008-12-31 Brooks Automation, Inc. Multiple dimension position sensor
US9752615B2 (en) * 2007-06-27 2017-09-05 Brooks Automation, Inc. Reduced-complexity self-bearing brushless DC motor
US8283813B2 (en) 2007-06-27 2012-10-09 Brooks Automation, Inc. Robot drive with magnetic spindle bearings
US8823294B2 (en) * 2007-06-27 2014-09-02 Brooks Automation, Inc. Commutation of an electromagnetic propulsion and guidance system
US7834618B2 (en) * 2007-06-27 2010-11-16 Brooks Automation, Inc. Position sensor system
US20090102467A1 (en) * 2007-10-22 2009-04-23 Johnson Controls Inc. Method and apparatus for sensing shaft rotation
DE102009049354A1 (de) * 2009-10-14 2011-04-21 Robert Bosch Gmbh Hydromaschine
EP2534448A4 (en) 2010-02-11 2014-09-10 Kurt D Fulkerson WAY MEASURING SYSTEM AND METHOD THROUGH MAGNETIC ENCODING
US20160138940A1 (en) * 2014-11-19 2016-05-19 Borgwarner Inc. Contactless rotary sensor

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2016144A (en) * 1934-11-02 1935-10-01 Alfred E Hill Electrical circuit
US2938199A (en) * 1957-07-24 1960-05-24 United Aircraft Corp Sequential pulse analogue to digital converter
US3192521A (en) * 1961-03-10 1965-06-29 Electro Mechanical Res Inc Shaft encoders
US3452358A (en) * 1963-05-03 1969-06-24 Westinghouse Electric Corp Magnetically encoded device
US3484780A (en) * 1965-05-25 1969-12-16 Hitachi Ltd Analog-to-digital signal converter including coder plate device and logic circuitry
GB1485646A (en) * 1973-11-16 1977-09-14 Hitachi Ltd Digital displacement sensors
US3968691A (en) * 1974-03-13 1976-07-13 Lynes, Inc. Environmental condition sensing apparatus
US4072052A (en) * 1976-08-18 1978-02-07 Instrumentation Specialties Company Flow proportioner
JPS5326149A (en) * 1976-08-23 1978-03-10 Ishikawajima Harima Heavy Ind Relative position detector
JPS5355055A (en) * 1976-10-27 1978-05-19 Yamato Scale Co Ltd Gray code reader
JPS54118259A (en) * 1978-03-06 1979-09-13 Nec Corp Angle detector
JPS54156656A (en) * 1978-05-31 1979-12-10 Nippon Denso Co Ltd Rotating position detector
US4418372A (en) * 1979-08-02 1983-11-29 Hitachi, Ltd. Magnetic rotary encoder
JPS57123493A (en) * 1981-01-23 1982-07-31 Hitachi Ltd Magnetic rotary encoder
JPS57123494A (en) * 1981-01-23 1982-07-31 Hitachi Ltd Magnetic rotary encoder
US4853632A (en) * 1981-02-07 1989-08-01 Hitachi, Ltd. Apparatus for magnetically detecting a position of a movable magnetic body
GB2096421A (en) * 1981-04-07 1982-10-13 Secretary Industry Brit Position transducer for fluid actuated ram
JPS5860215A (ja) * 1981-10-06 1983-04-09 Hitachi Ltd 位置検出付エンコ−ダ
JPS58129303A (ja) * 1982-01-29 1983-08-02 Fuji Heavy Ind Ltd 位置検出装置
JPS60196619A (ja) * 1984-03-21 1985-10-05 Hitachi Ltd 移動体の位置検出装置

Also Published As

Publication number Publication date
JPS59108193A (ja) 1984-06-22
KR840007285A (ko) 1984-12-06
US4904937A (en) 1990-02-27
DE3382275D1 (de) 1991-06-13
EP0111866A2 (en) 1984-06-27
EP0111866A3 (en) 1986-12-30
EP0111866B1 (en) 1991-05-08

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