一种磁电自供电无线传感器电源管理电路研究.pdfVIP

第 2 1 卷 　第 8 期 传 感 技 术 学 报 Vol . 2 1 　N o . 8 2008 年 8 月 CHIN ES E J OU RNAL O F S EN SORS AND AC TUA TORS Au g . 2008 Study on the Power Management Circuit of a Magnetoelectric SelfPowered Wireless Sensor L I U P ang ang , W E N Yum ei , L I P i ng , B I A N L eix i ang , J I A Ch aobo , L I X i ngs heng Key L ab of Op toelect ronic Technology an d S y s tem of t he E d ucat ion M i nis t ry of Chi na , Col leg e of Op toelect ronic Eng i neeri ng , Chong qi ng Uni vers ity , Chong qi ng 400044 , Chi na Abstract :The GMM / PZ T magnetoelect ric co mpo sit e can harve st elect ro magnetic ener gy . A s t he outp ut power of t he GMM / PZ T magnetoelect ric co mpo sit e i s not sufficient for t he wirele ss sen sor ’s p ower re quirement , a p ower management circuit ba sed on swit chedcap acitor net wor k i s de signed . The char ge and di schar ge charact eri stic s of t he power management circuit are analyzed an d exp eriment ed . The re sult s show t hat t hi s circuit can char ge storage cap acitor s , w hen t he elect ric ener gy accumulat e s to a cert ain lev el , t he storage cap acitor s will di schar ge to drive t he wirele ss sen sor in st ant ly . Key words :selfpowered ; GMM/ PZ T co mpo sit e ;power management circuit ; wirele ss sen sor ; swit chedca p acitor net wor k EEACC :8110 ;6150 P 一种磁电自供电无线传感器电源管理电路研究 刘盼刚 ,文玉梅 ,李 　平 ,卞雷祥 , 贾朝波 ,李兴圣 (重庆大学光电工程学院光电技术及系统教育部重点实验室 ,重庆 400044) 摘 　要 :针对 GMM/ PZT 磁电复合单元将电磁波能量转化为电能时 ,其输出电能不足以直接驱动无线传感器的问题 ,设计了 基于开关电容网络的电源管理电路 ,对其充放电特性进行了理论与实验分析 。结果表明 ,该电路可以对电路中储能电容充电 积累能量 ,当能量积累到一定