JPS5760262A - Rotary detector for rotary object - Google Patents

Rotary detector for rotary object

Info

Publication number
JPS5760262A
JPS5760262A JP13437280A JP13437280A JPS5760262A JP S5760262 A JPS5760262 A JP S5760262A JP 13437280 A JP13437280 A JP 13437280A JP 13437280 A JP13437280 A JP 13437280A JP S5760262 A JPS5760262 A JP S5760262A
Authority
JP
Japan
Prior art keywords
magnetic
magnetic resistance
theta
bridge
rotary
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
JP13437280A
Other languages
Japanese (ja)
Other versions
JPH0330089B2 (en
Inventor
Tadashi Takahashi
Hiroshi Hayashida
Kunio Miyashita
Sadao Sekizawa
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 JP13437280A priority Critical patent/JPS5760262A/en
Priority to DE8181107686T priority patent/DE3174569D1/en
Priority to US06/306,233 priority patent/US4628259A/en
Priority to EP81107686A priority patent/EP0048983B2/en
Publication of JPS5760262A publication Critical patent/JPS5760262A/en
Priority to US07/686,996 priority patent/USRE34355E/en
Publication of JPH0330089B2 publication Critical patent/JPH0330089B2/ja
Granted 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

Abstract

PURPOSE:To enable the miniaturization and mass production of a magnetic effect element, by a method wherein, in a rotary detector employing the magnetic resistance effect element, a bridge circuit consistion of a magnetic resistance element on said element is improved. CONSTITUTION:A magnetic resistance effect element 5 (MR element) is constituted such that 6 thin film magnetic resistance elements R1-R4, R7, and R8, which are made of a strongly magnetic material, are formed on a substrate 5a. Two bridge circuits of R1-R4 and R1-R2-R3-R4, in which the magnetic resistane elements R1 and R2 are formed into a common side, consist of feeding terminals V1 and V2 and detecting terminals a, b, and c. The common side R1-R2 is spaced away from a magnetic medium 4 to be measured, and other sides are positioned in the proximity of the medium. A first bridge side R3-R4 and a second bridge side R7-R8 are displaced in position by theta/4 from each other and the sides of said bridges are displaced in position by theta/2 from each other, where theta is 1/2 a wavelength of a magnetic signal. This reduces a necessary number of the magnetic resistance elements, miniaturizes the MR element, enables the easy evaporating formation of the magnetic resistance element, and permits the mass production of the MR element.
JP13437280A 1980-09-29 1980-09-29 Rotary detector for rotary object Granted JPS5760262A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP13437280A JPS5760262A (en) 1980-09-29 1980-09-29 Rotary detector for rotary object
DE8181107686T DE3174569D1 (en) 1980-09-29 1981-09-28 Rotation detecting means for a rotating body
US06/306,233 US4628259A (en) 1980-09-29 1981-09-28 Magneto resistive sensor for detecting movement of a rotating body
EP81107686A EP0048983B2 (en) 1980-09-29 1981-09-28 Rotation detecting means for a rotating body
US07/686,996 USRE34355E (en) 1980-09-29 1991-04-18 Magneto resistive sensor for detecting movement of a rotating body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13437280A JPS5760262A (en) 1980-09-29 1980-09-29 Rotary detector for rotary object

Publications (2)

Publication Number Publication Date
JPS5760262A true JPS5760262A (en) 1982-04-12
JPH0330089B2 JPH0330089B2 (en) 1991-04-26

Family

ID=15126840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13437280A Granted JPS5760262A (en) 1980-09-29 1980-09-29 Rotary detector for rotary object

Country Status (1)

Country Link
JP (1) JPS5760262A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151072A (en) * 1983-02-17 1984-08-29 Sankyo Seiki Mfg Co Ltd Magnetism detecting device
JPS61226447A (en) * 1985-03-25 1986-10-08 ジヨンソン・アンド・ジヨンソン・ウルトラサウンド・インコーポレイテツド Control of speed of sheet of paper for hard copy recorder
JPS625125A (en) * 1985-07-01 1987-01-12 Sankyo Seiki Mfg Co Ltd Magnetoresistance effect element
JPS62225909A (en) * 1986-03-27 1987-10-03 Nikon Corp Magnetic rotary encoder
WO2008153004A1 (en) * 2007-06-11 2008-12-18 Alps Electric Co., Ltd. Magnetic detection device and electric product

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59151072A (en) * 1983-02-17 1984-08-29 Sankyo Seiki Mfg Co Ltd Magnetism detecting device
JPS61226447A (en) * 1985-03-25 1986-10-08 ジヨンソン・アンド・ジヨンソン・ウルトラサウンド・インコーポレイテツド Control of speed of sheet of paper for hard copy recorder
JPS625125A (en) * 1985-07-01 1987-01-12 Sankyo Seiki Mfg Co Ltd Magnetoresistance effect element
JPS62225909A (en) * 1986-03-27 1987-10-03 Nikon Corp Magnetic rotary encoder
WO2008153004A1 (en) * 2007-06-11 2008-12-18 Alps Electric Co., Ltd. Magnetic detection device and electric product
JP5048771B2 (en) * 2007-06-11 2012-10-17 アルプス電気株式会社 Magnetic detector and electrical product

Also Published As

Publication number Publication date
JPH0330089B2 (en) 1991-04-26

Similar Documents

Publication Publication Date Title
GB854153A (en) Non-destructive sensing of a magnetic core
DK478476A (en) ELECTRONIC SYSTEM FOR READING SYMBOLS
CA990355A (en) Fault simulation system for determining the testability of a non-linear integrated circuit by an electrical signal test pattern
JPS5760262A (en) Rotary detector for rotary object
GB1511307A (en) System for measuring the frequency of an electrical signa
SE398036B (en) PROCEDURE FOR MANUFACTURING A CONDUCTOR PLATE WITH ON ONE SIDE OF THE PLATE BY MEASUREMENT CIRCUIT BRIDGES EXCEEDING AT THE CROSSING POINT FROM EACH OTHER ELECTRICALLY INSULATED CONDUCTOR PATH
JPS5218170A (en) Position detection method
JPS57141013A (en) Thin film magnetic sensor
AT342142B (en) CIRCUIT ARRANGEMENT FOR FAILURE-SAFE SIGNAL PROCESSING
JPS57141014A (en) Thin film magnetic sensor
JPS5634132A (en) Element for detecting magnetic field
JPS54148577A (en) Magnetic-field-detecting element
JPS5467463A (en) Meter for liquid level of molten material
JPS5355057A (en) Measuring apparatus of multipoint temperature
JPS5525146A (en) Magnetic card collation device
JPS5266476A (en) Temperature sensor
SU580491A1 (en) Meter for measuring the concentration of copper ions in etching solutions for the production of printed circuit boards
JPS5339110A (en) Magnetoresistance effect head
PILIPENKO Measurement of small temperature variations by means of electronic bridges
JPS647043A (en) Photomask
SU449305A1 (en) Thermistor sensor
JPS63101709A (en) Magnetic resistance sensor for magnetic encoder
JPS5363083A (en) Detecting circuit for minute changing quantity
JPS5238978A (en) Temperature detecting circuit
JPS6425009A (en) Magnetic head for magnetic encoder