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The study of modal sensors and actuators is motivated by their ability to control the resonance frequency and the vibration modes of mechanical structures. In this work, a non-homogeneous poling method to obtain a radial modal sensor from a piezoelectric disc is presented. The construction method for three modal elements is described and their electrical behavior is presented and analyzed in comparison to a uniform poled disc.

The design and construction of a bolt-clamped Langevin type transducer is presented in conjunction with its 3D analysis using Finite Element Analysis (FEA). Results show a good agreement between simulation using FEA and the mechanical adjustment of the transducer to tuned it at the desired operation frequency.