Process for measuring rotation speeds about several axes, and a multiplexed multi-axial gyrofiber allowing this measurement
US5719674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1996 |
| Grant date | Feb 17, 1998 |
| Priority date | — |
| Expiry date | Apr 17, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C19/728
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A process and an optical gyroscope are provided for measuring rotation speeds (S) about N axes. The light source and the photodetector are common. Controlled modulation phase differences .delta..PHI..sub.c,i COMPRISE biasing components .delta..PHI..sub.m,i (42, 45, 46) with a common modulation period T.sub.m and common amplitude. Since each half-period T.sub.m /2 is divided into N time intervals .delta.t.sub.i, a change in the sign of the biasing component .delta..PHI..sub.m,i associated with each interferometer I.sub.i is produced at the beginning of one and only one .delta.t.sub.i time interval. Sagnac phase shifts .delta..PHI..sub.s,i are obtained by sampling a signal on the N time intervals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.