JPS56157810A - Position detector - Google Patents

Position detector

Info

Publication number
JPS56157810A
JPS56157810A JP6194780A JP6194780A JPS56157810A JP S56157810 A JPS56157810 A JP S56157810A JP 6194780 A JP6194780 A JP 6194780A JP 6194780 A JP6194780 A JP 6194780A JP S56157810 A JPS56157810 A JP S56157810A
Authority
JP
Japan
Prior art keywords
magnetic
yoke
magnetic flux
teeth
position detector
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.)
Pending
Application number
JP6194780A
Other languages
Japanese (ja)
Inventor
Hiroshi Sakai
Masami Ujiie
Takeshi Oshima
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP6194780A priority Critical patent/JPS56157810A/en
Publication of JPS56157810A publication Critical patent/JPS56157810A/en
Pending legal-status Critical Current

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
    • G01D5/24428—Error prevention
    • G01D5/24433—Error prevention by mechanical means
    • G01D5/24438—Special design of the sensing element or scale

Landscapes

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

Abstract

PURPOSE:To eliminate the need for the temperature compensation and simplify the constitution of a position detector by preventing the magnetic flux of the magnetic circuit, which is formed by opposing magnetic pole parts comprising a yoke provided with teeth on both ends to a movable yoke having teeth of given pitch, from including a constant component. CONSTITUTION:A magnetic circuit is formed from a permanent 1, a U-shaped yoke 13, a plate-shaped yoke 23, right and left magnetic poles 14R and 14L and a toothed yoke 5. The magnetic resistance generated in air gaps G1-G4 by the magnetomotive force of the permanent magnet 1 are represented by R1-R4. Moreover, the magnetic resistances generated in a part of a magnetic flux detecting element 2, a part of the permanent magnet 1 and an air gap G0 are represented by R5-R7. R1-R7 form a Wheatstone bridge, and when specified relationships are applied to R1-R7, phiv= Kcostheta is obtained. The magnetic flux phiv generated in R5 is measured by means of the magnetic flux detecting element 2. K is a constant. and theta represents the relative position between the magnetic pole parts 14L-1, 14R-1 and the teeth of the toothed yoke 5-1, the tooth pitch being 2pi. Thereby, the detected magnetic flux becomes a sine-wave function not including a constant component. Accordingly, a position detector requiring no temperature compensating circuit is obtained.
JP6194780A 1980-05-10 1980-05-10 Position detector Pending JPS56157810A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6194780A JPS56157810A (en) 1980-05-10 1980-05-10 Position detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6194780A JPS56157810A (en) 1980-05-10 1980-05-10 Position detector

Publications (1)

Publication Number Publication Date
JPS56157810A true JPS56157810A (en) 1981-12-05

Family

ID=13185889

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6194780A Pending JPS56157810A (en) 1980-05-10 1980-05-10 Position detector

Country Status (1)

Country Link
JP (1) JPS56157810A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58183508U (en) * 1982-05-29 1983-12-07 日本フエンオ−ル株式会社 Linear scale detection head
US4535289A (en) * 1981-05-15 1985-08-13 Fuji Jukogyo Kabushiki Kaisha Device for measuring a position of a moving object
JPH02141616A (en) * 1988-11-24 1990-05-31 Copal Co Ltd Apparatus for detecting relative displacement
JP2008145140A (en) * 2006-12-06 2008-06-26 Ushio Inc Magnetic flux sensor, and plane stage equipped with same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4535289A (en) * 1981-05-15 1985-08-13 Fuji Jukogyo Kabushiki Kaisha Device for measuring a position of a moving object
JPS58183508U (en) * 1982-05-29 1983-12-07 日本フエンオ−ル株式会社 Linear scale detection head
JPH02141616A (en) * 1988-11-24 1990-05-31 Copal Co Ltd Apparatus for detecting relative displacement
JP2008145140A (en) * 2006-12-06 2008-06-26 Ushio Inc Magnetic flux sensor, and plane stage equipped with same

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