基于悬臂梁结构的压电能量收集器的机电转化效率分析

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.①%The impact process of the steel ball and the cantilever structure was analyzed. The relationship between the output electrical energy and input mechanical energy based on cantilever piezoelectric energy harvester of two various materials of PMNT and PZT was investigated by piezoelectric oscillator equivalent circuit model calculations and experimental data. The influence of coupling coefficient on electromechanical conversion efficiency was also analyzed. The conversion of mechanical energy into electrical energy was realized by a steel ball free-falling and impacting the cantilever structure.