Analysis of upper bound power output for a wrist-worn rotational energy harvester from real-world measured inputs

T. Xue, X. Ma, C. Rahn, S. Roundy

Research output: Contribution to journalConference articlepeer-review

25 Scopus citations

Abstract

Energy harvesting from human motion addresses the growing need for battery-free health and wellness sensors in wearable applications. The major obstacles to harvesting energy in such applications are low and random frequencies due to the nature of human motion. This paper presents a generalized rotational harvester model in 3 dimensions to determine the upper bound of power output from real world measured data. Simulation results indicate much space for improvement on power generation comparing to existing devices. We have developed a rotational energy harvester for human motion that attempts to close the gap between theoretical possibility and demonstrated devices. Like previous work, it makes use of magnetically plucked piezoelectric beams. However, it more fully utilizes the space available and has many degrees of freedom available for optimization. Finally we present a prototype harvester based on the coupled harvester model with preliminary experimental validation.

Original languageEnglish (US)
Article number012090
JournalJournal of Physics: Conference Series
Volume557
Issue number1
DOIs
StatePublished - 2014
Event14th International Conference on Micro- and Nano-Technology for Power Generation and Energy Conversion Applications, PowerMEMS 2014 - Awaji Island, Hyogo, Japan
Duration: Nov 18 2014Nov 21 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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