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| Dynamic characteristics study and tests of bistable piezoelectric cantilever beam energy harvester under raindrop impact |
| LIU Lilan, ZHONG Sheng, WU Ziying |
| School of Mechanical and Instrumental Engineering, Xi’an University of Technology, Xi’an 710048, China |
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Abstract Bistable piezoelectric cantilever beam energy harvester can be used to convert raindrop kinetic energy into electrical energy.Here, the mechanical model and control equation of bistable piezoelectric cantilever beam energy harvester were established.The mathematical model of single raindrop impact force was obtained through simplification.The lognormal distribution function was used to simulate the random distribution of raindrop diameter under different rainfall intensities.Effects of raindrop diameter and rainfall intensity on dynamic characteristics and power generation performance of the energy harvester system were studied using numerical simulation.The test device for raindrop impact to generate electric energy was built, and effects of raindrop falling height on the system output voltage were actually measured.The study results could provide a reference for study on exploring new energy sources by adopting raindrop impact to generate electric energy.
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Received: 30 July 2019
Published: 15 June 2021
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