自供能压电振动能量回收接口电路优化设计  

Optimal Design of Self-powered Piezoelectric Vibration Energy Harvesting Circuit

作　　者：孙子文[1] 沈星[1] 陈金金[1] 

机构地区：[1]南京航空航天大学机械结构力学及控制国家重点实验室智能材料与结构研究所,江苏南京210016

出　　处：《压电与声光》2013年第4期536-539,共4页Piezoelectrics & Acoustooptics

基　　金：国家自然科学基金资助项目(50802043)

摘　　要：为了更适用于为无线传感网络供电,设计了一种自供能双同步开关电感电路(Self-powered DSSH电路)。在压电换能器中增加了2个压电片:一片为传感器,通过微分器和比较器产生与振动同步的脉冲信号;另一片为供能片,为微分器和比较器供能。由无源峰值检测开关组成的DC-DC变换器能及时地将能量回收为负载供电。实验结果证明,设计的自供能双同步开关电感电路输出功率达到305μW,相比标准电路提高了3.05倍,且一直保持最佳输出功率。In order to become more suitable to supply power for wireless sensor network,the self-powered Double synchronized switch harvesting circuit（self-powered DSSH circuit） was designed.Two piezoelectric patches were added into piezoelectric generator： One patch was sensor that generated pulse synchronous signal through differentiator and comparator;The other patch was used for supplying power for differentiator and comparator.The DC-DC converter composed of passive peak detection switch can harvest energy timely to supply power for the load.The experimental results showed that the output power of the self-powered DSSH circuit could be up to 305 W,which was 3.05 times of standard circuit,and it could keep the optimal output power.

关 键 词：无线传感网络 能量回收 压电发电机 双同步开关电感电路 自供能 

分 类 号：TN384[电子电信—物理电子学] TM619[电气工程—电力系统及自动化]