JPS6416920A - Rotational angle detector - Google Patents
Rotational angle detectorInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5667709A (en) * | 1979-11-08 | 1981-06-08 | Matsushita Electric Ind Co Ltd | Turning-angle detector |
-
1987
- 1987-07-10 JP JP17325787A patent/JPS6416920A/en active Pending
Patent Citations (1)
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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