基于悬臂梁结构的压电能量收集器的机电转化效率分析  

Electromechanical conversion efficiency of piezoelectric energy harvester based on cantilever structure

作　　者：方超[1] 胡永明[1] 任博[2] 梁柱[2] 许春东[2] 顾豪爽[1] 罗豪甦[2] 

机构地区：[1]湖北大学物理与电子科学学院,湖北武汉430062 [2]中国科学院上海硅酸盐研究所,上海201800

出　　处：《湖北大学学报（自然科学版）》2015年第5期451-455,共5页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(61274073)资助

摘　　要：分析钢球和压电悬臂梁之间的碰撞过程,通过压电振子等效电路模型计算与实验数据分析,研究基于PMNT与PZT两种不同材料的悬臂梁压电能量收集器的输入机械冲击能量和输出电能之间的关系,分析各自机电转换效率受机电耦合系数的影响规律,采用钢球下落撞击悬臂梁结构压电振子的方式实现机械能到电能的转换.The impact process of the steel ball and the cantilever structure was analyzed. The relationshipbetween the output electrical energy and input mechanical energy based on cantilever piezoelectric energyharvester of two various materials of PMNT and PZT was investigated by piezoelectric oscillator equivalentcircuit model calculations and experimental data. The influence of coupling coefficient on electromechanicalconversion efficiency was also analyzed. The conversion of mechanical energy into electrical energy wasrealized by a steel ball free-falling and impacting the cantilever structure.

关 键 词：能量收集 压电振子 悬臂梁 转换效率 

分 类 号：TB34[一般工业技术—材料科学与工程]