Naslov
Assessment of performances of optimized piezoelectric energy harvesters for wearables

Autori
Gljušćić, Petar ; Zelenika, Saša

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the 20th international conference of the EUSPEN - European society for precision engineering and nanotechnology / Leach, R. K. ; Billington, D. ; Nisbet, C. ; Phillips, D. - : European Society for Precision Engineering and Nanotechnology (EUSPEN), 2020, 49-52

ISBN
978-0-9957751-7-6

Skup
20th International conference of the European Society for Precision Engineering and Nanotechnology (EUSPEN)

Mjesto i datum
Online, 08.06.2020. - 12.06.2020

Vrsta sudjelovanja
Plenarno

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Kinetic energy harvesting ; broadband piezoelectric energy harvesting ; wearable technology ; biomedicine ; miniaturized devices

Sažetak
Wearable electronics, generally comprising low-power sensors, often aimed at Internet-of-Things solutions, can be powered by transforming low-level kinetic energy, induced by human motion, into electrical energy generated via piezoelectric energy harvesting principles. Such a design approach can lead to a significant increase of the autonomy of wearable devices. The main drawback in using piezoelectric energy harvesters is the narrow area of optimal operation around their eigenfrequency, which, due to the random nature of human motion, is particularly noticeable in wearable applications. In order to deal with this challenge, in this work the conventional rectangular bimorph cantilever is hence segmented into optimized shapes that allow achieving an increased specific power output and an adaptation to the foreseen applications, whereas the frequency up-conversion principle is employed. A complex coupled-field finite element model is used to simulate the electromechanical response of the resulting harvesters’ designs, and experimental measurements, on a suitably developed experimental set-up, are performed. A wrist-worn kinetic energy harvesting solution is hence proposed, combining the mentioned approaches. It is primarily aimed at powering ultra-low power wearable devices for medical applications, e.g. telemedicine, drug delivery and health monitoring.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo, Temeljne tehničke znanosti, Interdisciplinarne tehničke znanosti

POVEZANOST RADA