基于扭转模态的角振动压电俘能器研究  

Piezoelectric Generator Based on Torsional Modes for Power Harvesting From Angular Vibrations

作　　者：陈子光[1] 胡元太[1] 杨嘉实[2] 

机构地区：[1]中南大学土木建筑学院力学与传感技术研究所,长沙410083 [2]内布拉斯加大学工程力学系

出　　处：《应用数学和力学》2007年第6期693-698,共6页Applied Mathematics and Mechanics

摘　　要：以线性压电理论为基础,分析了压电陶瓷圆柱壳的扭转振动问题.由于压电陶瓷柱壳的扭转振动使得覆盖于柱壳两端的电极之间出现电势差,通过导线连接两电极与外负载,则圆柱壳在振动过程中所捕获的能量能有效地供给微电子器件工作.得到了输出电压、电流、能量、效率以及输出功率密度的解析表达式,并数值分析了这类压电俘能器的基本性能.结果表明,这种结构能够用作压电俘能器,将旋转机械能转化成为电能.Torsional vibration of a circular piezoelectric shell of polarized ceramics mounted on a rorationally vibrating base was analyzed. The shell is properly electroded and connected to a circuit such that an electric output is generated. The structure analyzed represents a piezoelectric generator for converting mechanical energy from angular vibrations to electrical energy. Analytical expressions and numerical results for the output voltage, current, power, efficiency and power density are given.

关 键 词：压电俘能器 扭转振动 俘获能量 效率 

分 类 号：O343.8[理学—固体力学]