Title :
Experimental validation of temperature self-compensation for LiTaO 3 piezoelectric gyroscope
Author :
Chiba, Mitsuharu ; Wakatsuki, Noboru
Author_Institution :
Dept. of Electron. & Mater., Ishinomaki Senshu Univ., Miyagi, Japan
Abstract :
To improve accuracy and stability, the authors are studying a flexural vibrational H-type gyroscope using a LiTaO3 single crystal with sharply suppressed leakage output. Using the equivalent circuit deduced from the experiment, we have proposed an automatic compensation method for the temperature characteristics of sensitivity and drift. We operate the piezoelectric gyroscope in the drive H-mode at the resonant frequency of the detection tuning fork mode and introduce the additional transducer to monitor directly the H-mode. Applying electrical feed-back using the monitor transducer, both detection and driving mode are stabilized. Therefore, DC drift is suppressed to 9.3% that of a conventional LiTaO3 gyroscope
Keywords :
compensation; equivalent circuits; feedback; gyroscopes; lithium compounds; piezoelectric devices; piezoelectric materials; DC drift; LiTaO3; LiTaO3 piezoelectric gyroscope; LiTaO3 single crystal; accuracy; automatic compensation method; detection tuning fork mode; drive H-mode; driving mode; electrical feed-back; equivalent circuit; flexural vibrational H-type gyroscope; monitor transducer; piezoelectric gyroscope; sensitivity; sharply suppressed leakage output; stability; temperature characteristics; temperature self-compensation; transducer; Crystalline materials; Electrodes; Gyroscopes; Monitoring; Piezoelectric transducers; Resonance; Resonant frequency; Temperature sensors; Vibrations; Wire;
Conference_Titel :
Ultrasonics Symposium, 2000 IEEE
Conference_Location :
San Juan
Print_ISBN :
0-7803-6365-5
DOI :
10.1109/ULTSYM.2000.922683
