Electronic compass and method for tracking vehicle rotation
US7225551B2 · kind B2 · utility
4Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 2005 |
| Grant date | Jun 5, 2007 |
| Priority date | — |
| Expiry date | Apr 21, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An example method for controlling an electronic compass includes determining compass tracking angles in a coordinate system for magnetic field data points that correspond to magnetic field sensor signals produced as a vehicle rotates relative to a surrounding magnetic field. The magnetic field data points produce an expected curve in the coordinate system. The rotation of the vehicle is tracked relative to the surrounding magnetic field based upon the compass tracking angles and whether the vehicle has rotated a desired amount is determined based at least partially upon the expected curve and the compass tracking angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.