Methods and systems for utilizing a ring magnet for magnetic sensing applications
US6853184B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 2002 |
| Grant date | Feb 8, 2005 |
| Priority date | — |
| Expiry date | Dec 2, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/09
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Methods and systems of utilizing a ring magnet for magnetic sensing applications thereof are disclosed. A magnetoresistive sensor device can be provided which is associated with a ring magnet configured as a sensing target. The magnetoresistive sensor device is insensitive to magnetic pole polarities. The ring magnet is generally magnetized to include a plurality of magnetic poles, such that at least one pole thereof is larger than at least one other pole thereof. An output signal can then be produced from the magnetoresistive sensor device via a digital circuit thereof. The output signal is independent of a rotation of the sensing target. The sensor itself is rotationally insensitive provided that the ring magnet is symmetrically magnetized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.