JPS6416920A - Rotational angle detector - Google Patents

Rotational angle detector

Info

Publication number
JPS6416920A
JPS6416920A JP17325787A JP17325787A JPS6416920A JP S6416920 A JPS6416920 A JP S6416920A JP 17325787 A JP17325787 A JP 17325787A JP 17325787 A JP17325787 A JP 17325787A JP S6416920 A JPS6416920 A JP S6416920A
Authority
JP
Japan
Prior art keywords
magneto
tooth parts
detecting
initial position
magnetic field
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
JP17325787A
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 JP17325787A priority Critical patent/JPS6416920A/en
Publication of JPS6416920A publication Critical patent/JPS6416920A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)

Abstract

PURPOSE:To prevent misdetection due to dust, etc., by providing a slit body which has some of tooth parts formed longer than other tooth parts, two magneto-resistance elements for detecting the quantity of rotation, etc., and one magneto-resistance element for detecting an initial position. CONSTITUTION:The slit body 14 is formed of a magnetic material so that some tooth parts 25 are formed longer than tooth parts 16 formed at the entire periphery. A sensor unit 17 consists of a couple of the two magneto-resistance elements 18 and 18a for detecting the quantity of rotation, etc., one magneto-resistance elements 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 slit body 14 passes in the constant magnetic field produced by the magnet 20, the variation of the magnetic field caused by the tooth parts 16 is detected by the element 18 and 18 and converted by the circuits 19 and 19a into pulse signals, which are transmitted to a controller to detect the rotational angle and rotating direction. Further, the initial position is detected through the tooth part 25, element 18b, and circuit 19b.
JP17325787A 1987-07-10 1987-07-10 Rotational angle detector Pending JPS6416920A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17325787A JPS6416920A (en) 1987-07-10 1987-07-10 Rotational angle detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17325787A JPS6416920A (en) 1987-07-10 1987-07-10 Rotational angle detector

Publications (1)

Publication Number Publication Date
JPS6416920A true JPS6416920A (en) 1989-01-20

Family

ID=15957093

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17325787A Pending JPS6416920A (en) 1987-07-10 1987-07-10 Rotational angle detector

Country Status (1)

Country Link
JP (1) JPS6416920A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5667709A (en) * 1979-11-08 1981-06-08 Matsushita Electric Ind Co Ltd Turning-angle detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5667709A (en) * 1979-11-08 1981-06-08 Matsushita Electric Ind Co Ltd Turning-angle detector

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