Research On Contactless Driving And Detecting Technique For Cylindrical Shell Vibration Gyroscopes

Cylindrical shell vibration gyroscopes, with the advantages such as high precision, low difficulty in processing, low cost and low energy consumption, have become an important research direction in the field of solid wave gyro. Resonator, as the key device of gyroscope, has great influence to the performance of the gyroscope system. High precision detection of resonator's performance can provide data support for resonator's follow-up processing and packaging, which can greatly improve the performance of the gyroscope.In order to improve the precision and efficiency of the resonator's performance detection, research on the contactless driving and detecting technique of cupped resonator has been implemented in this paper. Specifically, the following research has been carried out: 1. The structure and basic working principle of cylindrical shell vibratory gyroscope has been introduced and the mechanical model of resonator has been established which can provide theory base for research on contactless driving and detecting technique. 2. The contactless driving technique of the resonator was studied and a contactless driving system was founded which is based on the force provided by electromagnet and the driving parameter which has good driving effect has been identified through the simulation and experimental analysis. 3. The contactless detecting technique was studied and a contactless detecting system was built up using microphone as the testing component. The detecting parameter which has good detecting precision has been identified through the simulation and experimental analysis. 4. A resonator testing system has been built based on the technique of contactless driving and detecting. Performance of resonator including resonant frequency, frequency split, mechanical quality factor and the position of rigid axle has been tested using this system.