Abstract
An L type broadband piezoelectric energy harvesting device was proposed in this paper, and the finite element model of L-type piezoelectric vibrator is established and simulated. It shows that the voltage corresponding to the first and third order resonant frequency is 0.06 V and 0.183 V, respectively, although higher than that of the ordinary piezoelectric vibrator, the voltage of the first mode and third mode for the piezoelectric vibrator is not close, which has little effect to broaden the bandwidth. Consequently, the simulation model for multi-cantilever piezoelectric vibrator was established, and its structural sizes were optimized, and it was obtained very close to first and third order resonant voltage, the bandwidth of the vibrator was broadened to 12.5 Hz. The multi-cantilever piezoelectric vibrator can be applied in a variety of devices for the collection of mechanical energy, and to provide a research foundation for the development of intelligent structures with self-sufficiency.
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The research is funded by Natural Science Fund of Hubei Province [Grant No. 2016CFB581] and Key Laboratory Open Fund of Ministry of Education of Metallurgical Equipment and Control of Wuhan University of Science and Technology [2013A07].
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Zhen Yu is an Associate Professor of the Institute of Mechanical & Automation, Wuhan University of Science and Technology. He received his Ph.D. in Mechanical Manufacturing and Automation at Wuhan University of Technology, and engaged in postdoctoral research in Wuhan University of Science and Technology. His research interests include advanced manufacturing technology, super-precision manufacturing technology and theory, micro-nano-metric manufacturing process technology and theory, and application of intelligent materials, etc.
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Yu, Z., Zhang, Cy. & Zhang, Sy. Simulation analysis and optimization design for wide band piezoelectric oscillator of energy harvesting device. J Mech Sci Technol 34, 2745–2750 (2020). https://doi.org/10.1007/s12206-020-0606-5
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DOI: https://doi.org/10.1007/s12206-020-0606-5