wireless sensor system powered by an electromagnetic vibration energy harvester

Beeby, Steve, Torah, R, Tudor , M, O'Donnell, T and Roy, S (2008) wireless sensor system powered by an electromagnetic vibration energy harvester. Journal for the Institute of Measurement and Control, 41, (4), 109-113.


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This paper describes a microscale electromagnetic vibration powered generator that harvests kinetic energy and provides a localised power supply for wireless applications. The generator is as resonant device and therefore the power output depends upon the size of the inertial mass, the frequency and amplitude of the driving vibrations, the maximum available mass displacement and the damping. The electromagnetic generator has been implemented with discrete components and produces 58 ?Wrms at 0.6 ms-2 acceleration from a fixed frequency of 52 Hz and achieves the highest recorded efficiency to date of 51% for a device of this size. The packaged device is 0.8 cm3 and weighs 1.6 grams. The energy harvested is sufficient to power a wireless, accelerometer based microsystem. The microsystem is energy aware and will adjust the measurement/transmit duty cycle according to the available energy; this is typically every 3 seconds during normal operation.

Item Type: Article
Divisions : Faculty of Physical Sciences and Engineering > Electronics and Computer Science > EEE
ePrint ID: 266915
Accepted Date and Publication Date:
May 2008Published
Date Deposited: 14 Nov 2008 16:56
Last Modified: 31 Mar 2016 14:13
Further Information:Google Scholar
URI: http://eprints.soton.ac.uk/id/eprint/266915

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