A hemispherical resonant gyroscope and its excitation detection method

By using interdigital electrode excitation and optical detection, the problems of complex structure and signal interference in hemispherical resonant gyroscopes are solved, the quality factor and accuracy of the gyroscope are improved, and high-sensitivity excitation and detection are achieved, meeting the requirements of high precision and miniaturization.

CN116734820BActive Publication Date: 2026-06-30武汉华中旷腾光学科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
武汉华中旷腾光学科技有限公司
Filing Date
2023-05-15
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing excitation and detection technologies for hemispherical resonator gyroscopes suffer from problems such as complex resonator structure (requiring coating or bonding of piezoelectric ceramics), low resonator quality factor, increased frequency fragmentation, mutual interference between excitation and detection signals, and impact on gyroscope accuracy and reliability.

Method used

By employing interdigital electrode excitation and optical detection, interdigital electrodes and photoelectric detection devices are formed on the surface of the resonator, avoiding the need for coating. Combined with full-angle tracking control mode for signal processing and error compensation, the method achieves independence of excitation and detection and high sensitivity.

Benefits of technology

It improves the quality factor of the resonator, reduces frequency fragmentation, enhances the accuracy and reliability of the gyroscope, improves the dynamic range and environmental adaptability, and reduces the impact of signal interference.

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Abstract

This invention discloses a hemispherical resonator gyroscope based on interdigital electrode excitation and optical detection, comprising an excitation base and a hemispherical resonator. Interdigital electrodes and an optical detection device are mounted on the base of the resonator, respectively positioned on the circumferences of two concentric circles, serving to support the excitation base, the vacuum-sealed resonator assembly, and the vacuum connector for the interdigital electrode leads. The interdigital electrodes are connected to the vacuum connector via conductive pins. The invention also discloses its excitation and detection method. The interdigital electrode excitation of this invention is a non-contact electrical excitation, requiring no coating on the resonator, thus ensuring a high Q value and low-frequency fragmentation of the resonator. Within the gyroscope design framework of interdigital electrode excitation and optical detection, signal processing and error compensation are performed using full-angle tracking mode, which can improve the overall performance of the gyroscope, including accuracy, dynamic range, and environmental adaptability.
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