Characterization of liquids with Lamb waves using P(VDF-TrFE): the influence of temperature

Abstract

a0 mode Lamb waves are generated in a non-piezoelectric plate by mode conversion using P(VDF-TrFE) transducers upon which single-phase comb electrodes are etched. The determination of the propagation equations of the waves according to the device parameters (input voltage, number of comb fingers, plate thickness, ...) allows the influence of the density of a liquid in contact with the plate on the parameters of the propagated waves to be modelled. The model was experimentally validated and followed by a study of the behaviour of the device versus temperature.

Sensor application of fibre ultrasonic waveguide

“…An ultrasonic wave transmitted in a solid medium has been used as a tool for evaluating the structural integrity of the solid itself and for sensing the environmental change in its vicinity. All the ultrasonic modes such as bulk, surface, plate and shear waves have been tried for detecting the environmental change related to liquids and gases [1][2][3][4][5][6][7][8]. The used waveguides were a plate as a liquid sensor and a ball as a gas sensor.…”