Investigation of a cantilever structured piezoelectric energy harvester used for wearable devices with random vibration input
Bai, Yang; Tofel, Pavel; Hadas, Zdenek; Smilek, Jan; Losak, Petr; Skarvada, Pavel; Macku, Robert (2018-01-12)
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
© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
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.
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