Piezoelectric Resonant Sensors with Contactless Interrogation for Mass-Sensitive and Acoustic-Load Detection

E. Tonoli, M. Baù, M. Ferrari, V. Ferrari
2012 Procedia Engineering  
Piezoelectric resonator sensors that can be contactless interrogated as passive elements are proposed. The interrogation technique is based on time-gated excitation and detection phases, exploiting the sensing of the transient response of the resonator. The proposed system can be exploited for the measurement of physical or chemical quantities affecting the electromechanical resonant response. In particular, experimental results show the successful interrogation of variable-mass resonator
more » ... s for humidity sensing in closed volumes and submersible resonator sensors operated in liquid environments.
doi:10.1016/j.proeng.2012.09.179 fatcat:qszp5mrh6nd6pkhsu4cy3nhjoy