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https://doi.org/10.1088/0964-1726/23/5/055002
Copy DOIJournal: Smart Materials and Structures | Publication Date: Mar 18, 2014 |
Citations: 56 | License type: iop-standard |
The multi-impact energy harvester of the present study is a retrofitted piezoelectric based energy harvesting device that is designed especially for low frequency excitations. It consists of a spring–mass system and two piezoelectric cantilevers. By utilizing a series of impacts between the cantilevers and the moving mass, ambient vibrations of low frequencies can be up-converted into high frequency vibrations on the piezoelectric cantilevers and therefore generate usable electric energy. To examine the performance of the multi-impact harvester, a model is designed and machined for the experimental study. Sinusoidal vibrations and simulated bridge vibrations are used as the excitations for the harvester. A traditional cantilever piezoelectric harvester is also made for a performance comparison.
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