JPS6416921A - Rotational angle detector - Google Patents

Rotational angle detector

Info

Publication number
JPS6416921A
JPS6416921A JP17326087A JP17326087A JPS6416921A JP S6416921 A JPS6416921 A JP S6416921A JP 17326087 A JP17326087 A JP 17326087A JP 17326087 A JP17326087 A JP 17326087A JP S6416921 A JPS6416921 A JP S6416921A
Authority
JP
Japan
Prior art keywords
teeth
magneto
detecting
rotor
initial position
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
JP17326087A
Other languages
Japanese (ja)
Inventor
Shusaku Kawasaki
Hiroshi Hatase
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP17326087A priority Critical patent/JPS6416921A/en
Publication of JPS6416921A publication Critical patent/JPS6416921A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To preclude misdetection due to dust by providing a rotor where some teeth are formed longer than other teeth, two magneto-resistance elements for detecting the quantity of rotation, etc., and one magneto-resistance element for detecting an initial position. CONSTITUTION:The rotor 14 has some teeth 26 formed longer than other teeth 15 and is made of a magnetic material. A sensor unit 17, on the other hand, consists of a couple of two magneto-resistance elements 18 and 18a for detecting the quantity of rotation, etc., one magneto-resistance element 18b for detecting the initial position, a magnet 20 for producing a magnetic field, and pulse generating circuits 19, 19a, and 19b for generating pulses from the detection signals of the respective elements 18, 18a, and 18b. Then when the rotor 14 passes in a constant magnetic field produced by the magnet 20, the variation of the magnetic field caused by the teeth 15 is detected by the elements 18 and 18a and converted by the circuit 19 and 19a into pulse signals, which are sent to a controller to detect the quantity of rotation, etc. Further, the initial position is detected through the teeth 26, element 18b, and circuit 19b.
JP17326087A 1987-07-10 1987-07-10 Rotational angle detector Pending JPS6416921A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17326087A JPS6416921A (en) 1987-07-10 1987-07-10 Rotational angle detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17326087A JPS6416921A (en) 1987-07-10 1987-07-10 Rotational angle detector

Publications (1)

Publication Number Publication Date
JPS6416921A true JPS6416921A (en) 1989-01-20

Family

ID=15957152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17326087A Pending JPS6416921A (en) 1987-07-10 1987-07-10 Rotational angle detector

Country Status (1)

Country Link
JP (1) JPS6416921A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0378618A (en) * 1989-08-22 1991-04-03 Matsushita Electric Ind Co Ltd Electromagnetic induction type rotary encoder
JPH04335111A (en) * 1991-05-10 1992-11-24 Fanuc Ltd Magnetoresistance type rotation detector
JP2010237082A (en) * 2009-03-31 2010-10-21 Hitachi Cable Ltd Torque-index sensor

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558402A (en) * 1978-10-25 1980-05-01 Nippon Soken Inc Position detector
JPS5667709A (en) * 1979-11-08 1981-06-08 Matsushita Electric Ind Co Ltd Turning-angle detector

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5558402A (en) * 1978-10-25 1980-05-01 Nippon Soken Inc Position detector
JPS5667709A (en) * 1979-11-08 1981-06-08 Matsushita Electric Ind Co Ltd Turning-angle detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0378618A (en) * 1989-08-22 1991-04-03 Matsushita Electric Ind Co Ltd Electromagnetic induction type rotary encoder
JPH04335111A (en) * 1991-05-10 1992-11-24 Fanuc Ltd Magnetoresistance type rotation detector
JP2010237082A (en) * 2009-03-31 2010-10-21 Hitachi Cable Ltd Torque-index sensor

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