Powering portable electronics using vocal fold vibrations

Hyunjun Cho, Kyoohyun Noh, Tomohiro Ishikawa, Deajong Yang, Edgar Sanchez-Sinencio, Hyuck Choo

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Using a multi-stacked array of vibration-driven energy harvesters and a custom-tailored energy-harvesting (EH) circuit, we have achieved stable 3.12-mW power generation at 5.5 Vdc from the acousto-mechanical vibrations of the human vocal folds at 75 dB and demonstrated its use as a practical on-demand power source for portable and wearable electronics. The voltage and power outputs over 3.7 Vdc and 1 mW necessary for charging lithium polymer (LiPo) batteries were accomplished using a 3D-printed packaging platform whose physical design and mechanical properties maximized the vibration transfer and effectively combined 10 or more individual energy harvesters into a compact unified stack. The custom-designed LC-resonant EH circuit efficiently converted raw AC output into DC. Using our EH device, we have successfully charged 100-mAh LiPo battery and operated a portable 2×16 LCD display (requiring 2.8 V, 10 mA).

Original languageEnglish
Title of host publication2017 IEEE 30th International Conference on Micro Electro Mechanical Systems, MEMS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages217-220
Number of pages4
ISBN (Electronic)9781509050789
DOIs
Publication statusPublished - 2017 Feb 23
Event30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017 - Las Vegas, United States
Duration: 2017 Jan 222017 Jan 26

Publication series

NameProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
ISSN (Print)1084-6999

Other

Other30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017
Country/TerritoryUnited States
CityLas Vegas
Period17/1/2217/1/26

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanical Engineering
  • Electrical and Electronic Engineering

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