Impact of designed asymmetries on the effective bandwidth of a backfolded piezoelectric energy harvester
Artikel i vetenskaplig tidskrift, 2019

For the successful realization of autonomous wireless sensors, they will have to be able to harvest energy from their surroundings. Vibrational energy harvesting is one possible power source for wireless sensors, since vibrations are abundant in many environments. In order to make vibrational energy harvesters more useful, a broad bandwidth is desirable since many vibrations are stochastic in nature. In this paper we implement asymmetry to a backfolded piezoelectric energy harvester to achieve broader effective bandwidth with maintained power output. The optimized harvester achieves a minimum of 2.75 V in the frequency range 92–162 Hz with peak power output of 1.80 mW. Asymmetry based on different lengths of the conjoined cantilevers is experimentally and numerically shown to have the largest impact on the bandwidth, compared to the impact of modified mass loadings.

Författare

Elof Köhler

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Henrik Staaf

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Anderson David Smith

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Peter Folkow

Chalmers, Mekanik och maritima vetenskaper, Dynamik

Per Lundgren

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Peter Enoksson

Chalmers, Mikroteknologi och nanovetenskap (MC2), Elektronikmaterial och system

Sensors and Actuators, A: Physical

0924-4247 (ISSN)

Vol. 292 77-89

Ämneskategorier

Trävetenskap

Övrig annan teknik

Annan elektroteknik och elektronik

DOI

10.1016/j.sna.2019.03.046

Mer information

Senast uppdaterat

2019-07-22