Interferometric ship's heading reference system
US5606414A · kind A · utility
2Cited by
3References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1983 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Apr 1, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C21/166
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Two Sagnac interferometers are mounted on board a ship with their axes in a horizontal plane. The axis of one interferometer is aligned in a fore-aft direction whereas the axis of the other interferometer is aligned athwartship. The output signals of the two interferometers are combined mathematically so as to cancel the effects of the ship's latitude and thus provide an output signal independent of this parameter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.