JPS5723863A - Rotation detector - Google Patents

Rotation detector

Info

Publication number
JPS5723863A
JPS5723863A JP9753080A JP9753080A JPS5723863A JP S5723863 A JPS5723863 A JP S5723863A JP 9753080 A JP9753080 A JP 9753080A JP 9753080 A JP9753080 A JP 9753080A JP S5723863 A JPS5723863 A JP S5723863A
Authority
JP
Japan
Prior art keywords
elements
medium
sets
lambda
bridge
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
JP9753080A
Other languages
Japanese (ja)
Other versions
JPS6012579B2 (en
Inventor
Hiroshi Hayashida
Tadashi Takahashi
Kunio Miyashita
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 JP9753080A priority Critical patent/JPS6012579B2/en
Publication of JPS5723863A publication Critical patent/JPS5723863A/en
Publication of JPS6012579B2 publication Critical patent/JPS6012579B2/en
Expired 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)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To remove the change of a DC component caused by a change of spacing between a sensor and a medium by bringing in close vicinity to a medium only two sets of elements that adjoin each other separating by 90 deg. in an electrical angle in a rotation detector using a magnetic resistance element forming a bridge. CONSTITUTION:A cylindrical magnetic recording medium 3 is subjected alternately to NS magnetization in the direction of the circumference and rotates. Magnetic resistance elements R11, R12, R21, R22, R31, R32, R41 and R42 of 8 elemets 4 sets from a four-sides resistance bridge where an input voltage is applied between terminals (p) and (r) and from the output is taken out between terminals (q) and (s). Two elements that constitutes each set are connected in series, separated by lambda/2 (lambda=a distance between NS) and the changes are superposed. Only elements R21, R22, R41 and R42 of two sets that adjoin each other are brought near the medium and hold an interval of lambda/4, so a DC component causedly spacing change between the element and the medium is offset each other between the elements of said two sets. Therefore sensitivity rises by the bridge and variarion of a DC component is removed.
JP9753080A 1980-07-18 1980-07-18 rotation detection device Expired JPS6012579B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9753080A JPS6012579B2 (en) 1980-07-18 1980-07-18 rotation detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9753080A JPS6012579B2 (en) 1980-07-18 1980-07-18 rotation detection device

Publications (2)

Publication Number Publication Date
JPS5723863A true JPS5723863A (en) 1982-02-08
JPS6012579B2 JPS6012579B2 (en) 1985-04-02

Family

ID=14194799

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9753080A Expired JPS6012579B2 (en) 1980-07-18 1980-07-18 rotation detection device

Country Status (1)

Country Link
JP (1) JPS6012579B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093913U (en) * 1983-12-01 1985-06-26 ソニーマグネスケール株式会社 magnetic sensing head
JPS61126483A (en) * 1984-11-26 1986-06-13 Sankyo Seiki Mfg Co Ltd Magnetic detecting device
JPS62157521A (en) * 1985-12-28 1987-07-13 Nippon Gakki Seizo Kk Magnetoresistance sensor for encoder
JPH02264816A (en) * 1989-04-05 1990-10-29 Matsushita Electric Ind Co Ltd Magnetic sensor and manufacture thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093913U (en) * 1983-12-01 1985-06-26 ソニーマグネスケール株式会社 magnetic sensing head
JPH0421065Y2 (en) * 1983-12-01 1992-05-14
JPS61126483A (en) * 1984-11-26 1986-06-13 Sankyo Seiki Mfg Co Ltd Magnetic detecting device
JPS62157521A (en) * 1985-12-28 1987-07-13 Nippon Gakki Seizo Kk Magnetoresistance sensor for encoder
JPH02264816A (en) * 1989-04-05 1990-10-29 Matsushita Electric Ind Co Ltd Magnetic sensor and manufacture thereof

Also Published As

Publication number Publication date
JPS6012579B2 (en) 1985-04-02

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