压电阵列径向分布的二维振动能量采集器  

Two-dimensional vibration energy harvester with radially distributed piezoelectric array

作　　者：刘星 王佩红[1] 张小舟 赵海波 LIU Xing;WANG Pei-hong;ZHANG Xiao-zhou;ZHAO Hai-bo(School of Physics&Materials Science,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学物理与材料科学学院,安徽合肥230601

出　　处：《光学精密工程》2018年第9期2181-2189,共9页Optics and Precision Engineering

基　　金：国家自然科学基金面上项目(No.61671017);安徽省高校优秀青年人才支持计划重点项目(No.gxyqZD2018004);安徽省高等学校省级自然科学研究重点项目(No.KJ2016A787);安徽省自然科学基金面上项目(No.1508085ME72)

摘　　要：为了有效采集多个方向的振动能量,本文提出了一种圆柱形的压电阵列径向分布的二维(2D)振动能量采集器。通过将柔性弧形压电阵列径向分布在圆柱体上,该采集器可以收集到二维(2D)平面内任意方向的振动能量。同时,引入了角度带宽来描述采集器获取二维振动能量的能力。实验结果表明:这种新型结构采集器的角度带宽接近180°;而且,通过把对称位置的聚偏二氟乙烯(PVDF)压电元件进行反向串联,采集器的最大输出电压可以达到11.6V;当把对称位置的聚偏二氟乙烯(PVDF)压电元件反向并联时,最大输出功率达到13.5μW。与传统的悬臂式压电振动能量采集器相比,该二维(2D)采集器具有更好的多方向振动能量采集性能。In order to effectively collect vibration energy from multiple directions,a Piezoelectric Vibration Energy Harvester(PVEH)with a radially distributed piezoelectric array was proposed for scavenging two-dimensional(2D)vibration energy.By employing an arc-shaped piezoelectric array that was radially distributed on a flexible cylinder,the proposed harvester could scavenge vibration energy from various directions in a 2D plane.A novel concept,termed angle bandwidth,has also been introduced for describing the ability of harvesting 2D vibration energy.The obtained experimental results show that the proposed design can achieve a large angle bandwidth of approximately 180°.Furthermore,the maximum output voltage of the PVEH can reach a value of 11.6 V by connecting the symmetric polyvinylidene fluoride(PVDF)elements in series,whereas the maximum output power can attain a value of 13.5μW by connecting the symmetric PVDF elements in parallel.Hence,compared to a traditional cantilever-shaped PVEH,the proposed 2D PVEH possesses superior ability for harvesting multi-directional vibration energy.

关 键 词：压电振动能量采集器 二维振动 径向分布的压电阵列 角度带宽 

分 类 号：TB853.29[一般工业技术—摄影技术]