METHOD OF MEASURING THE ANGULAR VELOCITY OF A LASER GYROSCOPE WITH ALTERNATING FREQUENCY SUPPORT Russian patent published in 2018 - IPC G01C19/64 

FIELD: laser engineering.

SUBSTANCE: invention relates to measuring laser technology and can find its application in the measurement of the angular velocity of a laser gyroscope with an alternating frequency support. For this purpose, it is ensured that a sequence of pulses is formed on the basis of the output signal of rotation of the laser gyroscope, which follow one another at intervals, equal to the period of the output signal, counting the number of pulses of the output signal of rotation of the laser gyroscope on each half-cycle of switching the frequency base, determination of the sign of the frequency difference of counterpropagating waves and determining the start time of each half-period. Time intervals are measured between the first and last pulse on each half-cycle of switching the frequency stand, and also the number of pulses during these time intervals is counted and the angular velocity is determined according to the formula: Ω=(N₊/t₊+N_-/t_-)/2K, where Ω - average angular velocity; t₊ and t_- - time intervals between the first and last pulses in the half-period with the positive and negative sign of the frequency support, respectively; N₊ and N_- - the number of pulses calculated at time intervals t₊ and t_- respectively, with a sign of the frequency difference of counterpropagating waves; K is the scale factor of the laser gyroscope. To increase the accuracy of the angular velocity measurement, the measurement is performed over several periods of switching the frequency support, and for the measured value of the angular velocity, the arithmetic mean is taken from the angular velocity values obtained for each period. At the same time, the dynamic capture zones are eliminated in the output characteristic of the laser gyroscope and the accuracy of the angular velocity measurement is increased.

EFFECT: technical result is higher accuracy.

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