the present invention provides an angular rate gyro in which a bell - shaped vibrator having nonuniform thickness , axially symmetric and multi curved surface combined structural features is used as a sensitive element . the angular rate gyro is composed of the bell - shaped vibrator , a vibrator fixing shaft , a vibrator base , an airtight hood , a housing and a circuit system . the bell - shaped vibrator includes a bell shoulder having a hemispheric shell structure , a bell waist having a cylindrical shell structure and a bell lip having a hyperboloidal shell structure . the bell - shaped vibrator , the base and a central shaft are mechanically and fixedly connected together to be formed into an integral core having sensitive gyratory effect . a circuit system is used to control vibration forms of the bell - shaped vibrator , perform signal processing and solve the applied angular rate .