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Proceedings Paper

The design of an energy harvesting device for prolonging the working time of DC equipment
Author(s): Yayuan Wen; Huaxia Deng; Jin Zhang; Liandong Yu
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Paper Abstract

Energy harvesting (EH) derives from the idea of converting the ambient energy into electric energy, which can solve the problem of DC supply for some electronic equipment. PZT is a typical piezoelectric material of inorganic, which has been developed as EH devices to transfer ambient vibration energy into electric energy. However, these PZT devices require relatively violent excitation, and easy to be fatigue fracture under the resonance condition. In this paper, PVDF, which is a kind of soft piezoelectric polymer, is adopted for developing transducer. The PVDF devices are flexible and have longer life time than PZT devices under the harmonic environment. The EH researches are mainly focused on the development of energy transfer efficiency either by the mechanical structure of transducer or the improvement of circuit. However, the practicality and stability of the EH devices are important in the practical engineering applications. In this paper, a charge amplifier is introduced in the circuit in order to guarantee the stability of the battery charging under small ambient vibration conditions. The model of the mechanical structure of PVDF and the electric performance of circuit are developed. The experimental results and simulation show that the stability of battery charging is improved and the working time of DC equipment is prolonged.

Paper Details

Date Published: 26 January 2016
PDF: 14 pages
Proc. SPIE 9903, Seventh International Symposium on Precision Mechanical Measurements, 99032U (26 January 2016); doi: 10.1117/12.2218062
Show Author Affiliations
Yayuan Wen, Hefei Univ. of Technology (China)
Huaxia Deng, Hefei Univ. of Technology (China)
Jin Zhang, Hefei Univ. of Technology (China)
Liandong Yu, Hefei Univ. of Technology (China)

Published in SPIE Proceedings Vol. 9903:
Seventh International Symposium on Precision Mechanical Measurements
Liandong Yu, Editor(s)

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