FM-based piezoelectric strain voltage sensor at ultra-low frequencies with wireless capability

Title: FM-based piezoelectric strain voltage sensor at ultra-low frequencies with wireless capability
Creator: Laskovski, Anthony N.; Yuce, Mehmet R.; Moheimani, S. O. Reza
Relation: Sensors and Actuators A: Physical Vol. 199, p. 49-55
Publisher Link: http://dx.doi.org/10.1016/j.sna.2013.04.034
Publisher: Elsevier BV
Resource Type: journal article
Date: 2013
Description: An FM-based ultra low frequency piezoelectric strain voltage sensing system is proposed. The sensing frequencies possible in this system are orders of magnitude lower than those of traditional methods. This method involves the conversion of changes in piezoelectric device's strain voltage to changes in capacitance with a varactor diode. This diode forms part of a feedback network in a Colpitts oscillator, converting variations in capacitance to variations in frequency. The frequency variations are demodulated using an FM demodulator. Demodulated signals as low as 1 mHz were achieved and measured. The system was also implemented and measured with a wireless transmission and demodulation of the FM signal.
Subject: piezoelectric; FM; colpitts; wireless; nanopositioning; ultra-low frequency sensing
Identifier: http://hdl.handle.net/1959.13/1297362
Identifier: uon:19439
Identifier: ISSN:0924-4247
Language: eng
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