Multiple output rotational position detection device
US4604575A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1984 |
| Grant date | Aug 5, 1986 |
| Priority date | — |
| Expiry date | Oct 15, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/776
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This device comprises a first detector having a first rotor and a first stator for detecting an absolute rotational position within one cycle which corresponds to 1/N circumference, said rotor having teeth of N, and a second detector having a second rotor coupled with the first rotor and a second stator for detecting an absolute rotational position within one circumference within one cycle which corresponds to one circumference. The first and second stators are respectively provided with primary coils and secondary coils. The respective primary coils are excited by reference AC signals generated in response to a clock pulse signal from a clock pulse generator. Phase differences between first and second output signals produced from the secondary coils of the respective detectors and the reference AC signals are obtained by counting the clock pulse signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.