Nonlinear piezoelectric devices for broadband air-flow energy harvesting

被引：11
|
作者：
Bai, Y. [1 ,2 ]
Havranek, Z. [1 ]
Tofel, P. [1 ]
Meggs, C. [2 ]
Hughes, H. [1 ]
Button, T. W. [1 ,2 ]
机构：
[1] Brno Univ Technol, Cent European Inst Technol CEITEC, Brno 61600, Czech Republic
[2] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England
来源：
EUROPEAN PHYSICAL JOURNAL-SPECIAL TOPICS | 2015年 / 224卷 / 14-15期
关键词：
Root Mean Square; European Physical Journal Special Topic; Energy Harvester; Piezoelectric Layer; Force Frequency;
D O I：
10.1140/epjst/e2015-02582-8
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
This paper presents preliminary work on an investigation of a nonlinear air-flow energy harvester integrating magnets and a piezoelectric cantilever array. Two individual piezoelectric cantilevers with the structure of free-standing multi-layer thick-films have been fabricated and assembled with a free-spinning fan. The cantilevers were attached with different tip masses thereby achieving separated resonant frequencies. Also, permanent magnets were fixed onto the blades of the fan as well as the tips of the cantilevers, in order to create nonlinear coupling and transfer fluidic movement into mechanical oscillation. The device has been tested in a wind tunnel. Bifurcations in the spectra of the blade rotation speed of the fan as a function of output voltage have been observed, and a bandwidth (blade rotation speed range) widening effect has been achieved.
引用
收藏
页码：2675 / 2685
页数：11
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