Proposal of a New Multifunctional Measurement Method Using Piezoelectric Vibrator.

In this paper, we propose a new multifunctional sensing method by which the sound speed and impedance are measured using piezoelectric ceramics. An experiment was conducted to estimate the NaCl concentration and temperature by measuring the sound speed and conductivity using a pair of the piezoelectric ceramics. As a result, the usefulness of the proposed technique is demonstrated.