JPS573048A - Rotation detector - Google Patents

Rotation detector

Info

Publication number
JPS573048A
JPS573048A JP7662380A JP7662380A JPS573048A JP S573048 A JPS573048 A JP S573048A JP 7662380 A JP7662380 A JP 7662380A JP 7662380 A JP7662380 A JP 7662380A JP S573048 A JPS573048 A JP S573048A
Authority
JP
Japan
Prior art keywords
magnet
discontinuous
magnetic flux
magnetized
detects
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
JP7662380A
Other languages
Japanese (ja)
Inventor
Miyao Arakawa
Shinko Sato
Shigeie Abe
Susumu Asari
Katsunori Akimoto
Hiroyuki Nobechi
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.)
Denso Corp
Original Assignee
NipponDenso 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 NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP7662380A priority Critical patent/JPS573048A/en
Publication of JPS573048A publication Critical patent/JPS573048A/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)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To easily obrain many pieces of rotating information by a continuous part and a discontinuous part from one magnet and increase strength by providing the discontinuous material part in a rotary magnet for detecting rotation. CONSTITUTION:A rotary magnet 1 of a cylindrical shape is alternately magnetized in a circumferential direction, and includes a discontinuous material part 1-1. The discontinuous part is constituted of a material (for example, rare earth cobalt) which is magnetized stronger than other parts of the magnet 1 or the density of ferrite is made higher. A magnetism converter 2 is so disposed as to detect the magnetic flux of the rotary magnet, and 2-1 detects the magnetic flux on the circumferential surface including the discontinuous part and 2-2 detects the magnetic flux on the circumference of only the continuous part. In this way, many pieces of rotation information are easily obtained from one magnet, and since there are no shape defects, the strength is high; in addition, the magnet is magnetized after molding and therefore, its accuracy is good.
JP7662380A 1980-06-09 1980-06-09 Rotation detector Pending JPS573048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7662380A JPS573048A (en) 1980-06-09 1980-06-09 Rotation detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7662380A JPS573048A (en) 1980-06-09 1980-06-09 Rotation detector

Publications (1)

Publication Number Publication Date
JPS573048A true JPS573048A (en) 1982-01-08

Family

ID=13610474

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7662380A Pending JPS573048A (en) 1980-06-09 1980-06-09 Rotation detector

Country Status (1)

Country Link
JP (1) JPS573048A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01144864A (en) * 1987-09-25 1989-06-07 Jacques Guichard Audio-visual terminal equipment with auxiliary lighting apparatus
JPH0320324U (en) * 1989-07-06 1991-02-27

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01144864A (en) * 1987-09-25 1989-06-07 Jacques Guichard Audio-visual terminal equipment with auxiliary lighting apparatus
JPH0320324U (en) * 1989-07-06 1991-02-27

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