Rotation detector
US6568093B2 · kind B2 · utility
44Cited by
10References
21Claims
0Family size
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Key dates
| Filing date | Mar 26, 2001 |
| Grant date | May 27, 2003 |
| Priority date | — |
| Expiry date | Mar 26, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A rotation detector resists magnetic disturbances from sources near the detector. The rotation detector includes a rotor on which iron magnetic path changing pieces are fixed at predetermined intervals. A first bias magnet and a first magneto-resistive element for detecting the flux of the first bias magnet oppose the magnetic path changing pieces. A magnetic guide plate is located to guide disturbing magnetic flux in predetermined directions. The disturbing magnetic flux thus fails to adversely affect the first magneto-resistive element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.