Study of a Piezoelectric Energy Harvester for Driving a Wireless Sensor Node on a Bridge
ByeongHa Lee · SeongSu Jeong · SeongKyu Cheon · YongWoo Ha · TaeGone Park
∗Department of Electric Engineering, Changwon National University, Changwon 641-773, Korea (Received 29 April 2015 : revised 18 June 2015 : accepted 21 June 2015)
Electricity generation of a newly-proposed piezoelectric harvester for driving wireless sensors to monitor a bridge was studied. There are various security sensors on a bridge, and those require relatively lower electrical power than other lamps or sign posts. As an electric source for the sensors, a piezoelectric harvester which converts the mechanical vibrations of the bridge to electrical power, instead of a battery, was studied. The harvester, which had a low-frequency region, was analyzed by using the finite element method program ANSYS. The harvester was fabricated on the basis of the FEM result, and the experiment was conducted under conditions similar to those used for the simulation. The generating characteristics were verified by using the FEM and the experiment.
The dependences of the output current and power on the load resistance were measured and by comparing our result to the power consumptions of other sensors, we identified the possibility of using this newly-proposed piezoelectric energy harvester for driving wireless sensors.
PACS numbers: 77.65.-j, 77.84.-s
Keywords: FEM, Piezoelectric harvester, Wireless sensor node
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PACS numbers: 77.65.-j, 77.84.-s
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∗E-mail: [email protected]
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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ACKNOWLEDGEMENTS
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 2011-0030058). This work was supported by the Human Resource Training Program for Regional Innovation and Creativity through the Ministry of Education and National Research Foundation of Korea (NRF-2014H1C1A1066941).
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