A testing system of angular velocity sensor based on fiber ring carity is described

and through analysis on several important circuit modules

frequency locking circuit modules used for achievement of feedback control of laser and resonance point tracking is described.Experimental results show that the circuit module can make transmission peak locked at the lowest point

make center frequency of laser always be locked at the resonance point

in certain period of time

when rotary speed is less than 1 r / s

the fineness can reach a high value.