The Measurement of hemispherical resonator normal-mode axis azimuth is basic for its fabrication and adjustment. Firstly, determination method of the normal-mode axis azimuth was theoretically analyzed. Secondly, based on position excitation, harmonic response simulation of the hemispherical resonator was carried out, measurement process of the normal-mode axis azimuth was simulated. Finally, experimental scheme was designed, normal-mode of hemispherical resonator is excited by the non-contact acoustic excitation, vibration signals at different positions of the lip edge are collected by laser Doppler vibrometer. Angular resolution of the method is better than 1°. The experimental results show that the measurement error of the azimuth angle is about 4.4%. The method is feasible, simple and easy to operate. It is significant for research of improving the hemispherical resonator’s performance.
Key words
hemispherical resonator /
normal-mode axis /
harmonic simulation /
acoustic excitation
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