FIELD: instrumentation.
SUBSTANCE: fibre-optic gyro comprises fibre ring interferometer and electronic data processing unit. The latter comprises sync detector to isolate spinning signal and electronic device for accumulated data division at sync detector output to permanent signal component at sync detector input. Mismatch signal zeroing feedback circuit includes auxiliary FM voltage generator. Angular velocities are measured at Sagnac phase difference variation in the range of ±[(0÷π/4)] rad; ±[(3π/4+2πn)÷(5π/4+2πn)] rad; ±[(7π/4+2πn)÷(9π/4+2πn)] rad, where n=0, 1, 2…. Ring interferometer beam phase difference modulation is used as a intermittent series of rectangular pulses with amplitude of ±π/2 rad and ±3π/2 rad. Angular velocities are measured at Sagnac phase difference variation in the range of ±[(π/4+2πn)÷(3π/4+2πn)] rad and ±[(5π/4+2πn)+(7π/4+2πn)] rad. Ring interferometer beam phase difference modulation is used as a intermittent series of rectangular pulses with amplitude of 0 rad and ±π rad.
EFFECT: extended range of measurements.
10 dwg
