Acoustic Power Transfer (APT) systems have gained interest in many engineering applications thanks to their superior efficiency and wireless connection when through-hole wiring is not an option. Although APT systems have been extensively studied in the last decades, the performance of such systems has not been yet optimized to achieve high efficiency or/and output power levels. In this paper, we consider the APT system consisting of a metal barrier sandwiched between two piezoelectric elements using epoxy as a coupling layer. Towards this, a three-dimensional propagation finite element model is developed and genetic algorithm-based optimization problem is formulated and implemented. The simulation results were compared against their experimental counterparts.
Through-wall acoustic energy transfer (TWAET) using piezoelectric devices is a technology proposed for wirelessly charging sensors in enclosed shells or vessels typically found in automobiles, space stations, and nuclear reactors. This mode of energy transfer has received significant attention in recent years as they outperform the traditional electromagnetic based through-wall wireless power transfer techniques which suffer due to Faraday shielding. Although useful, the existing framework is not suited to charge an enclosed sensor network. To address this shortcoming, we present, for the first time, acoustic holograms for selective TWAET and the details of the design, experiments, and potential applications.
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