A Novel Vibration Mode Testing Method for Cylindrical Resonators Based on Microphones

Sensors

Yongmeng Zhang²  Yulie Wu²  Xuezhong Wu¹  Xiang Xi² 

[1] College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410000, China;

关键词: vibration mode testing;    cylindrical resonator;    vibratory cylinder gyroscope;    MEMS microphone;   

DOI  :  10.3390/s150101954

来源: mdpi

【 摘 要 】

Non-contact testing is an important method for the study of the vibrating characteristic of cylindrical resonators. For the vibratory cylinder gyroscope excited by piezo-electric electrodes, mode testing of the cylindrical resonator is difficult. In this paper, a novel vibration testing method for cylindrical resonators is proposed. This method uses a MEMS microphone, which has the characteristics of small size and accurate directivity, to measure the vibration of the cylindrical resonator. A testing system was established, then the system was used to measure the vibration mode of the resonator. The experimental results show that the orientation resolution of the node of the vibration mode is better than 0.1°. This method also has the advantages of low cost and easy operation. It can be used in vibration testing and provide accurate results, which is important for the study of the vibration mode and thermal stability of vibratory cylindrical gyroscopes.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.