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Open AccessArticle

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

College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410000, China
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Sensors 2015, 15(1), 1954-1963; https://doi.org/10.3390/s150101954
Received: 1 September 2014 / Accepted: 12 January 2015 / Published: 16 January 2015
(This article belongs to the Section Physical Sensors)
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. View Full-Text
Keywords: vibration mode testing; cylindrical resonator; vibratory cylinder gyroscope; MEMS microphone vibration mode testing; cylindrical resonator; vibratory cylinder gyroscope; MEMS microphone
MDPI and ACS Style

Zhang, Y.; Wu, Y.; Wu, X.; Xi, X.; Wang, J. A Novel Vibration Mode Testing Method for Cylindrical Resonators Based on Microphones. Sensors 2015, 15, 1954-1963.

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