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Proceedings Paper

Ultrasound acoustic wave energy transfer and harvesting
Author(s): Shima Shahab; Stephen Leadenham; François Guillot; Karim Sabra; Alper Erturk
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Paper Abstract

This paper investigates low-power electricity generation from ultrasound acoustic wave energy transfer combined with piezoelectric energy harvesting for wireless applications ranging from medical implants to naval sensor systems. The focus is placed on an underwater system that consists of a pulsating source for spherical wave generation and a harvester connected to an external resistive load for quantifying the electrical power output. An analytical electro-acoustic model is developed to relate the source strength to the electrical power output of the harvester located at a specific distance from the source. The model couples the energy harvester dynamics (piezoelectric device and electrical load) with the source strength through the acoustic-structure interaction at the harvester-fluid interface. Case studies are given for a detailed understanding of the coupled system dynamics under various conditions. Specifically the relationship between the electrical power output and system parameters, such as the distance of the harvester from the source, dimensions of the harvester, level of source strength, and electrical load resistance are explored. Sensitivity of the electrical power output to the excitation frequency in the neighborhood of the harvester’s underwater resonance frequency is also reported.

Paper Details

Date Published: 1 April 2014
PDF: 9 pages
Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90570F (1 April 2014); doi: 10.1117/12.2045198
Show Author Affiliations
Shima Shahab, Georgia Institute of Technology (United States)
Stephen Leadenham, Georgia Institute of Technology (United States)
François Guillot, Georgia Institute of Technology (United States)
Karim Sabra, Georgia Institute of Technology (United States)
Alper Erturk, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 9057:
Active and Passive Smart Structures and Integrated Systems 2014
Wei-Hsin Liao, Editor(s)

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