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Conference Papers Year : 2010

Remote Control of SAW Resonators Using a Frequency-Modulation-Based Interrogation Strategy

Abstract

Within the context of probing acoustic wave resonators acting as wireless, passive sensors, we present a strategy for wireless monitoring of surface accoustic wave (SAW) resonators using a frequency modulation based interrogation method. The basic principle is the conversion of frequency modulation to amplitude modulation by the resonator through its S-11 transfer function. An ARM-7 based central processing unit synchronizes the narrow-band probing pulse emission, emission to reception switching, data sampling and data processing. A closed loop control keeps the emitted carrier frequency at the resonance frequency of the sensor: we demonstrate a resolution of 2Hz on the resonance freqeuncy identification at 1s integration time, limited by this proportional feedback loop.
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Dates and versions

hal-00589216 , version 1 (14-05-2021)

Licence

Attribution - CC BY 4.0

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C. Droit, J.-M. Friedt, G. Martin, S. Ballandras. Remote Control of SAW Resonators Using a Frequency-Modulation-Based Interrogation Strategy. 2010 IEEE International Frequency Control Symposium, Jun 2010, New Port Beach, United States. pp.503-510, ⟨10.1109/FREQ.2010.5556277⟩. ⟨hal-00589216⟩
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