• Volume/Page
  • Keyword
  • DOI
  • Citation
  • Advanced
   
 
 
 

You are not logged in You are logged out of this journal. Log In

Journal of the Acoustical Society of America / Volume 123 / Issue 4 / TRANSDUCTION [38]

Acoustic energy harvesting using an electromechanical Helmholtz resonator a

a Preliminary portions of this work were presented in “Technology Development for Electromechanical Acoustic Liners,” Paper A04-093, at Active 04, Williamsburg, VA, September 2004.

J. Acoust. Soc. Am. Volume 123, Issue 4, pp. 1983-1990 (2008); (8 pages)

Fei Liu1, Alex Phipps2, Stephen Horowitz1, Khai Ngo2, Louis Cattafesta1, Toshikazu Nishida2, and Mark Sheplak1

1Department of Mechanical and Aerospace Engineering, University of Florida, Gainesville, Florida 32611-6250, USA
2Department of Electrical and Computer Engineering, University of Florida, Gainesville, Florida 32611-6130, USA

Full Text: Read Online (HTML) | Download PDF | Buy PDF (US$30) | View Cart
This paper presents the development of an acoustic energy harvester using an electromechanical Helmholtz resonator (EMHR). The EMHR consists of an orifice, cavity, and a piezoelectric diaphragm. Acoustic energy is converted to mechanical energy when sound incident on the orifice generates an oscillatory pressure in the cavity, which in turns causes the vibration of the diaphragm. The conversion of acoustic energy to electrical energy is achieved via piezoelectric transduction in the diaphragm of the EMHR. Moreover, the diaphragm is coupled with energy reclamation circuitry to increase the efficiency of the energy conversion. Lumped element modeling of the EMHR is used to provide physical insight into the coupled energy domain dynamics governing the energy reclamation process. The feasibility of acoustic energy reclamation using an EMHR is demonstrated in a plane wave tube for two power converter topologies. The first is comprised of only a rectifier, and the second uses a rectifier connected to a flyback converter to improve load matching. Experimental results indicate that approximately 30 mW of output power is harvested for an incident sound pressure level of 160 dB with a flyback converter. Such power level is sufficient to power a variety of low power electronic devices.

© 2008 Acoustical Society of America

ACKNOWLEDGMENTS

Financial support for this project is provided by NASA Langley Research Center (Grant No. 1 NAG-1-2261), monitored by Michael G. Jones. The authors gratefully acknowledge the helpful suggestions of Robert Taylor and Shu Jiang regarding energy reclamation circuitry.

Article Outline

  1. INTRODUCTION
  2. LUMPED ELEMENT MODEL OF THE EMHR
  3. ENERGY HARVESTING CIRCUITRY
  4. EXPERIMENTAL SETUP
  5. RESULTS AND DISCUSSION
  6. CONCLUSIONS

RELATED DATABASES

To view database links for this article, you need to log in.

KEYWORDS and PACS

Keywords

acoustic devices, cavity resonators, DC-DC power convertors, diaphragms, direct energy conversion, electromechanical effects, piezoelectric transducers, rectifiers

PACS

  • 43.38.Fx

    Piezoelectric and ferroelectric transducers

  • 43.50.Gf

    Noise control at source: redesign, application of absorptive materials and reactive elements, mufflers, noise silencers, noise barriers, and attenuators, etc.

  • 43.50.Ki

    Active noise control

ARTICLE DATA

History
Received 03 Aug 2007
Accepted 04 Jan 2008
Revised 03 Jan 2008
Permalink
http://dx.doi.org/10.1121/1.2839000

PUBLICATION DATA

ISSN:

0001-4966 (print)  

Publisher:

$abstract.society.value is a Member of CrossRef Acoustical Society of America

For access to fully linked references, you need to log in.

For access to citing articles, you need to log in.


Figures (10) Tables (3)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)

Access to article objects (figures, tables, multimedia) requires a subscription; log in to view available files.
(Access to supplementary files, where available, is free for this journal.)



Close

Your Recent History Recent History Help

Recently Viewed

  1. Acoustic energy harvesting using an electromechanical Helmholtz resonator
  2. Development of a micromachined piezoelectric microphone for aeroacoustics applications
  3. A multiple degree of freedom electromechanical Helmholtz resonator

Home Publications Meetings Contact ASA Site Map Back to Top

Copyright © Acoustical Society of America

close