METHOD extended range of angular rate fiber optic gyroscopes open loop

摘要

A method of expansion of the angular velocity measuring range of the fiber optic gyroscope with open-loop comprising a fiber ring interferometer, and an electronic information processing unit which comprises in turn a synchronous detector for isolating the rotation of the signal amplitude and electronic split device stored information at the output of the synchronous detector by a constant signal component at the input of the synchronous detector, and a feedback circuit for resetting the error signal and generates comprising Op voltage auxiliary phase modulation, when filing which a phase modulator is formed by a phase difference between the beams of the ring interferometer into a periodic sequence of rectangular pulses synchronous detector to isolate the error signal when changing the efficiency of the phase modulator and a regulator of the phase modulation of pulse amplitude, characterized in that the measuring angular velocity when changing the Sagnac phase difference in the range of ± [((0 ÷ π / 4)] radians; ± [(3π / 4 + 2πn) ÷ (5π / 4 + 2πn)] radians; ± [(7π / 4 + 2πn) ÷ (9π / 4 + 2πn)] radians, where n = 0, 1, 2 ... are used modulation phase difference ring interferometer beams in the form of a periodic rectangular pulse sequences with amplitudes of ± π / 2 radians and ± 3π / 2 radians, and for measuring angular velocity when changing the Sagnac phase difference in the range of ± [(π / 4 + 2πn) ÷ (3π / 4 + 2πn)] radians; ± [(5π / 4 + 2πn) + (7π / 4 + 2πn)] radians; modulation using phase difference ring interferometer beams in the form of a periodic rectangular pulse sequences with amplitudes 0 and ± π radians radians.