METHOD TO MEASURE ANGULAR MOVEMENTS BY LASER GYROSCOPE Russian patent published in 2014 - IPC G01C19/64 

FIELD: measurement equipment.

SUBSTANCE: method to measure angular movements with a laser gyroscope, including tuning and operation of a laser gyroscope in a double-frequency mode on one of orthogonally polarised modes of the circular laser of the laser gyroscope, development of dithering with the help of application of magnetic field onto an active element of a circular laser with elliptical or circular polarisation of radiation in active element of the circular laser, identification of information on angular movements from information arriving from a circular laser, periodical alternate operation of the circular laser in double-frequency mode on modes with orthogonal polarisations of the circular laser, switching of the circular laser to the mode with orthogonal polarisation after each another moment of completion of circular laser operation at any of these modes, in which previously or when measuring angular movements by amplitude of a rotation signal, or by value of dithering, or by value of a signal of perimeter detune, or by voltage on a piezohead they determine time intervals during switches of polarisation for modes with orthogonal polarisations, in which results of measurements of angular movements will be used with account of errors specified by variation of dithering due to detune of the circular laser perimeter, caused by switching of polarisation, previously they measure and/or calculate for modes with orthogonal polarisations the dependence of dithering on the value of the signal of circular laser resonator perimeter detune, during each another switch in process of measurements of angular movements in selected time intervals of this switch in each appropriate mode with orthogonal polarisation they measure dependence of the signal of circular laser perimeter detune on time, for each selected time interval at each such switch in measurement of angular movements they calculate and account errors specified by variation of the dithering value due to detune of circular laser resonator perimeter during switching of polarisation, using a previously measured and/or calculated dependence of dithering on the value of the circular laser resonator perimeter detune for appropriate mode and measured for the same mode during this switching the dependence of the signal of perimeter detune on time in the same chosen time interval of this switching.

EFFECT: method makes it possible to substantially reduce errors of measurements of angular movements due to reduced time of invalid information retrieval during switching of polarisations.