JPS5766363A - Detecting device for rotation - Google Patents

Detecting device for rotation

Info

Publication number
JPS5766363A
JPS5766363A JP55140494A JP14049480A JPS5766363A JP S5766363 A JPS5766363 A JP S5766363A JP 55140494 A JP55140494 A JP 55140494A JP 14049480 A JP14049480 A JP 14049480A JP S5766363 A JPS5766363 A JP S5766363A
Authority
JP
Japan
Prior art keywords
magnet
elements
rotation
variations
reluctance
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
JP55140494A
Other languages
Japanese (ja)
Inventor
Itsuki Ban
Akihiro Nakajima
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.)
Sekoh Giken KK
Secoh Giken Co Ltd
Original Assignee
Sekoh Giken KK
Secoh Giken 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 Sekoh Giken KK, Secoh Giken Co Ltd filed Critical Sekoh Giken KK
Priority to JP55140494A priority Critical patent/JPS5766363A/en
Publication of JPS5766363A publication Critical patent/JPS5766363A/en
Pending 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
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To obtain a low-cost rotation detecting device by composing of a rotary magnet and plural magnetic reluctance elements which are arranged in the neighborhood of the magnet in such a manner that all are connected in parallel. CONSTITUTION:A cylindrical permanent magnet 6, which is fixed to a rotary shaft 1 through a holder 7, has magnetic poles 6a and 6b which are NS magnetized in circunferential direction. Facing to this magnet 6, magnetic reluctance elements 8a and 8b are arranged in such positions that they are mutually shifted by 90 deg.. These two magnetic reluctance elements 8a and 8b are connected in parallel, and variations of electrical resistance are put out from terminals 9a and 9b as variations of voltage. Electrical resistances of the magnetic reluctance elements 8a and 8b vary in accordance with rotation of the magnet 6, and as to the variations of reluctance of the elements 8a and 8b, because of their respectively different phases, combined reluctance of parallel connection varies at a frequency being twofold of that of an element. In other words, one rotation of the magnet 6 detects 4-time voltage changes.
JP55140494A 1980-10-09 1980-10-09 Detecting device for rotation Pending JPS5766363A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55140494A JPS5766363A (en) 1980-10-09 1980-10-09 Detecting device for rotation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55140494A JPS5766363A (en) 1980-10-09 1980-10-09 Detecting device for rotation

Publications (1)

Publication Number Publication Date
JPS5766363A true JPS5766363A (en) 1982-04-22

Family

ID=15269922

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55140494A Pending JPS5766363A (en) 1980-10-09 1980-10-09 Detecting device for rotation

Country Status (1)

Country Link
JP (1) JPS5766363A (en)

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