Process for measuring rotation speeds about several axes, and a multiplexed multi-axial gyrofiber allowing this measurement

摘要

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 c,i COMPRISE biasing components delta PHI m,i (42, 45, 46) with a common modulation period Tm and common amplitude. Since each half-period Tm/2 is divided into N time intervals delta ti, a change in the sign of the biasing component delta PHI m,i associated with each interferometer Ii is produced at the beginning of one and only one delta ti time interval. Sagnac phase shifts delta PHI s,i are obtained by sampling a signal on the N time intervals.