Rotation angle detecting device having function of detecting abnormality
US7218100B1 · kind B1 · utility
8Cited by
0References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 2006 |
| Grant date | May 15, 2007 |
| Priority date | — |
| Expiry date | Oct 19, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D2205/80
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotation angle detecting device includes magnetic field forming members such as a permanent magnet and a yoke, a plurality of magnetic sensors disposed in the magnetic field to rotate relative to the magnetic field forming members to provide output signals that are 90 degrees in phase different from each other, a judgment level calculating circuit that provides a judgment level based on the output signals and judging circuit that judges the output signals normal if the judgment level is within a prescribed range and not normal if the judgment level is out of the prescribed range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.