Investigation of a cantilever structured piezoelectric energy harvester used for wearable devices with random vibration input

The capability of using a linear kinetic energy harvester — A cantilever structured piezoelectric energy harvester — to harvest human motions in the real-life activities is investigated. The whole loop of the design, simulation, fabrication and test of the energy harvester is presented. With the smart wristband/watch sized energy harvester, a root mean square of the output power of 50 μW is obtained from the real-life hand-arm motion in human’s daily life. Such a power is enough to make some low power consumption sensors to be self-powered. This paper provides a good and reliable comparison to those with nonlinear structures. It also helps the designers to consider whether to choose a nonlinear structure or not in a particular energy harvester based on different application scenarios.

Authors:
Bai Yang, Tofel Pavel, Hadas Zdenek, Smilek Jan, Losak Petr, Skarvada Pavel, Macku Robert

Publication type:
A1 Journal article – refereed

Place of publication:

Keywords:
Body motion, Cantilever, Energy harvesting, Piezoelectric, PZNN-PLZT, Random vibration, Wearable

Published:

Full citation:
Yang Bai, Pavel Tofel, Zdenek Hadas, Jan Smilek, Petr Losak, Pavel Skarvada, Robert Macku, Investigation of a cantilever structured piezoelectric energy harvester used for wearable devices with random vibration input, Mechanical Systems and Signal Processing, Volume 106, June 2018, Pages 303-318, ISSN 0888-3270, https://doi.org/10.1016/j.ymssp.2018.01.006

DOI:
https://doi.org/10.1016/j.ymssp.2018.01.006

Read the publication here:
http://urn.fi/urn:nbn:fi-fe201801252288