Broadband performance of a patterned piezoelectric energy harvester integrated with a continuous elastoacoustic mirror

Matteo Carrara; Jason A. Kulpe; Stephen M. Leadenham; Michael J. Leamy; Alper Erturk

doi:10.1117/12.2084319

2 April 2015 Broadband performance of a patterned piezoelectric energy harvester integrated with a continuous elastoacoustic mirror

Matteo Carrara, Jason A. Kulpe, Stephen M. Leadenham, Michael J. Leamy, Alper Erturk

Author Affiliations +

Proceedings Volume 9431, Active and Passive Smart Structures and Integrated Systems 2015; 943102 (2015) https://doi.org/10.1117/12.2084319
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2015, San Diego, California, United States

Abstract

In this work we explore efficient transformation of broadband wave energy into low-power electricity using patterned polymer piezoelectrics integrated with an Elliptical Acoustic Mirror (EAM) configuration. The mirror under consideration features a semi-elliptical continuous mirror with a rectangular arrangement of harvesting material overlapping the geometrical focus of the mirror. Spatial and temporal transformation of the wave propagation field into the frequency-wavenumber domain is performed in order to identify the wavenumber content inside the mirror region. A frequency-domain Root-Mean-Square (RMS) evaluation is then applied in order to guarantee broadband harvesting characteristics to the resulting Distributed Harvester (DH). Computational modeling and experimental testing are employed to quantify performance enhancement of the presented approach in the 20-120 kHz range, where broadband focusing characteristics of the continuous EAM are confirmed experimentally. Additionally the patterned configuration with proper wiring results in substantial power enhancement over 20-60 kHz, i.e. the neighborhood of the center frequency used in its Fourier transform-based design.

Citation Download Citation

Matteo Carrara, Jason A. Kulpe, Stephen M. Leadenham, Michael J. Leamy, and Alper Erturk "Broadband performance of a patterned piezoelectric energy harvester integrated with a continuous elastoacoustic mirror", Proc. SPIE 9431, Active and Passive Smart Structures and Integrated Systems 2015, 943102 (2 April 2015); https://doi.org/10.1117/12.2084319

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