Comparison of various models for piezoelectric receivers in wireless acoustic power transfer

Ahmed Allam; Karim Sabra; Alper Erturk

doi:10.1117/12.2515377

27 March 2019 Comparison of various models for piezoelectric receivers in wireless acoustic power transfer

Ahmed Allam, Karim Sabra, Alper Erturk

Proceedings Volume 10967, Active and Passive Smart Structures and Integrated Systems XIII; 109670S (2019) https://doi.org/10.1117/12.2515377
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

Piezoelectric transduction has lately been employed in wireless acoustic power transfer (APT) for powering electronic components that cannot be accessed easily, such as deep-implanted medical devices. Typically, the axial (or thickness) vibration mode of piezoelectric materials is used to generate acoustic waves that propagate through a medium, which are then converted back into electricity and delivered to an electrical load at the receiver end. The piezoelectric receiver can have various aspect ratios (length/diameter) in a given APT application. This work aims to develop and compare various models, such as the classical theory, Rayleigh’s theory, and Bishop’s theory, as well as finite-element model simulations, for different aspect ratios with an emphasis on those with comparable dimensions. Following analytical modeling and numerical simulation efforts, both in air and fluid loaded impedance frequency response functions are compared to report the valid aspect ratio ranges of the respective theories and their limitations, along with comparisons against experiments.

Conference Presentation

Citation Download Citation

Ahmed Allam, Karim Sabra, and Alper Erturk "Comparison of various models for piezoelectric receivers in wireless acoustic power transfer ", Proc. SPIE 10967, Active and Passive Smart Structures and Integrated Systems XIII, 109670S (27 March 2019); https://doi.org/10.1117/12.2515377

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