Zhu, MeilingWorthington, Emma2011-09-292011-09-292009-10-01Zhu, M. & Worthington, E. (2009) Design and testing of piezoelectric energy harvesting devices for generation of higher electric power for wireless sensor networks , 8th Annual IEEE Conference on Sensors 2009. 25-28 October, Christchurch New Zealand.978-14244-5335-11930-0395http://dspace.lib.cranfield.ac.uk/handle/1826/4391http://dx.doi.org/10.1109/ICSENS.2009.5398559This paper reports our design and testing results on the electric output performance of a vibration-based piezoelectric energy harvesting device (PEHD). The PEHD is a cantilever with a sandwich structure and seismic mass attached to the tip. The geometric parameters of the device are based on optimization design with a volume of around 1cm3 and at a targeted resonant frequency of 80-100 Hz. A maximum output power of 370μW at 15.5 volts into a 325kΩ resistive load is generated at the resonant frequency of 87Hz and under an acceleration of 0.23g. Quite remarkably, this power is a very encouraging power figure that gives the prospect of being able to power a wider range of applications than is currently possible in wireless sensor networpiezoelectric energy harvestingConference paper