Magnetic compass calibration
US4698912A · kind A · utility
50Cited by
9References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1985 |
| Grant date | Oct 13, 1987 |
| Priority date | — |
| Expiry date | Dec 11, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C17/38
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus for providing a magnetic compass, and system to accurately calibrate the compass with a rotation of the vessel on which the compass is mounted through a single rotation of 360 degrees. The compass comprises gimballed field sensing elements, and processor to provide a signal which is corrected for compass offsets, for permanent magnetic field anomalies and for induced magnetic field anomalies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.