Ultrasound acoustic wave energy transfer and harvesting

Shima Shahab; Stephen Leadenham; François Guillot; Karim Sabra; Alper Erturk

doi:10.1117/12.2045198

1 April 2014 Ultrasound acoustic wave energy transfer and harvesting

Shima Shahab, Stephen Leadenham, François Guillot, Karim Sabra, Alper Erturk

Proceedings Volume 9057, Active and Passive Smart Structures and Integrated Systems 2014; 90570F (2014) https://doi.org/10.1117/12.2045198
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

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.

Citation Download Citation

Shima Shahab, Stephen Leadenham, François Guillot, Karim Sabra, and Alper Erturk "Ultrasound acoustic wave energy transfer and harvesting", Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90570F (1 April 2014); https://doi.org/10.1117/12.2045198

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