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JPS6479619A - Absolute value type magnetic scale apparatus - Google Patents

Absolute value type magnetic scale apparatus

Info

Publication number
JPS6479619A
JPS6479619A JP23705887A JP23705887A JPS6479619A JP S6479619 A JPS6479619 A JP S6479619A JP 23705887 A JP23705887 A JP 23705887A JP 23705887 A JP23705887 A JP 23705887A JP S6479619 A JPS6479619 A JP S6479619A
Authority
JP
Japan
Prior art keywords
signal
magnetic
decoder
supplied
cycle
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.)
Granted
Application number
JP23705887A
Other languages
Japanese (ja)
Other versions
JP2571394B2 (en
Inventor
Takashi Mikoshiba
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.)
Macome Corp
Original Assignee
Macome Corp
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 Macome Corp filed Critical Macome Corp
Priority to JP62237058A priority Critical patent/JP2571394B2/en
Publication of JPS6479619A publication Critical patent/JPS6479619A/en
Application granted granted Critical
Publication of JP2571394B2 publication Critical patent/JP2571394B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To obtain high resolving power, by providing a magnetic track on which a series magnetic pattern CP preventing the generation of the combination code of the same bit and an alternating magnetic pattern KP having one bit length of said pattern as a cycle are respectively recorded. CONSTITUTION:The magnetic pattern CP 9a recorded on a magnetic scale 1 is detected by the first detection head 4a and digitalized to become a discontinuous non-repeating code signal HC to be supplied to a decoder 7. The analogue signals having 90 deg. phase difference obtained from two sets of the second detection heads 4d (4b, 4c) arranged on the second magnetic track 2b having KP 9b recorded thereon are supplied to an interpolation device 8 and a digital section absolute value signal having a value of 0-V (binary number) is generated on one cycle synchronous to one cycle of said analogue signals to be supplied to the decoder 7. By this constitution, the decoder 7 performs the rearrangement and permulation of an HC signal to obtain a signal wherein one step becomes V and a section absolute position signal is added to said signal and a digital absolute position signal having high resolving capacity is obtained in the whole of the magnetic scale.
JP62237058A 1987-09-21 1987-09-21 Absolute value type magnetic scale device Expired - Lifetime JP2571394B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62237058A JP2571394B2 (en) 1987-09-21 1987-09-21 Absolute value type magnetic scale device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62237058A JP2571394B2 (en) 1987-09-21 1987-09-21 Absolute value type magnetic scale device

Publications (2)

Publication Number Publication Date
JPS6479619A true JPS6479619A (en) 1989-03-24
JP2571394B2 JP2571394B2 (en) 1997-01-16

Family

ID=17009794

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62237058A Expired - Lifetime JP2571394B2 (en) 1987-09-21 1987-09-21 Absolute value type magnetic scale device

Country Status (1)

Country Link
JP (1) JP2571394B2 (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0348723A (en) * 1989-07-17 1991-03-01 Sony Magnescale Inc Position detecting device
JPH03140819A (en) * 1989-10-26 1991-06-14 Nikon Corp Absolute encoder
JPH0476418A (en) * 1990-07-18 1992-03-11 Nikon Corp Absolute encoder
US5841274A (en) * 1997-01-29 1998-11-24 Mitutoyo Corporation Induced current absolute position transducer using a code-track-type scale and read head
JP2007033245A (en) * 2005-07-27 2007-02-08 Mitsubishi Electric Corp Magnetic absolute type encoder
JP2009216589A (en) * 2008-03-11 2009-09-24 Makome Kenkyusho:Kk Absolute value type magnetic scale device
JP2011013187A (en) * 2009-07-06 2011-01-20 Tokai Rika Co Ltd Position detection device and shift device
EP1342992B1 (en) * 2002-03-05 2017-11-29 Dmg Mori Seiki Co., Ltd. Position transducer
JP2019138693A (en) * 2018-02-07 2019-08-22 日本電産サンキョー株式会社 Position detector and position detection method
JP2019138694A (en) * 2018-02-07 2019-08-22 日本電産サンキョー株式会社 Position detector and position detection method
US11946779B2 (en) 2020-04-09 2024-04-02 Dmg Mori Co., Ltd. Position detection apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016217783A (en) * 2015-05-15 2016-12-22 日本電産サンキョー株式会社 Position detection device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57175211A (en) * 1981-04-23 1982-10-28 Hitachi Constr Mach Co Ltd Angle detector of rotating body

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57175211A (en) * 1981-04-23 1982-10-28 Hitachi Constr Mach Co Ltd Angle detector of rotating body

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0348723A (en) * 1989-07-17 1991-03-01 Sony Magnescale Inc Position detecting device
JPH03140819A (en) * 1989-10-26 1991-06-14 Nikon Corp Absolute encoder
JPH0476418A (en) * 1990-07-18 1992-03-11 Nikon Corp Absolute encoder
US5841274A (en) * 1997-01-29 1998-11-24 Mitutoyo Corporation Induced current absolute position transducer using a code-track-type scale and read head
EP1342992B1 (en) * 2002-03-05 2017-11-29 Dmg Mori Seiki Co., Ltd. Position transducer
JP2007033245A (en) * 2005-07-27 2007-02-08 Mitsubishi Electric Corp Magnetic absolute type encoder
JP2009216589A (en) * 2008-03-11 2009-09-24 Makome Kenkyusho:Kk Absolute value type magnetic scale device
JP2011013187A (en) * 2009-07-06 2011-01-20 Tokai Rika Co Ltd Position detection device and shift device
JP2019138693A (en) * 2018-02-07 2019-08-22 日本電産サンキョー株式会社 Position detector and position detection method
JP2019138694A (en) * 2018-02-07 2019-08-22 日本電産サンキョー株式会社 Position detector and position detection method
US11946779B2 (en) 2020-04-09 2024-04-02 Dmg Mori Co., Ltd. Position detection apparatus

Also Published As

Publication number Publication date
JP2571394B2 (en) 1997-01-16

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