摘要
设计了一种双弹性基底磁电换能器,实现较宽频带内的交变磁场能量到电能的转换。并设计了电源管理电路,实现长时间内对磁电换能器输出电能的收集,瞬间放电,驱动负载工作。实验表明,这种双弹性基底磁电换能器的磁电响应带宽比单弹性基底的磁电换能器的带宽有所提高。而电源管理电路中的储能超级电容经过一定时间的充电,当其两端电压达到0.5V时,能量瞬间释放电路工作,成功驱动最大功耗为75mW的无线传感器节点正常工作,工作时长为620ms。
A broad bandwidth magnetoelectric transducer was designed, which can harvest electromagnetic energy in broad bandwidth. A power management circuit is designed, which can collect energy in a long time and release the energy to drive load in a short time. The experiment results show that the response bandwidth of the transducer with two elastic substrates is wider than response bandwidth of the transducer with one elastic substrate. And the power management circuit can charge storage capacitors. When the electric energy accumulates to a certain level, the storage capacitors will discharge to drive the wireless sensor instantly.
出处
《传感技术学报》
CAS
CSCD
北大核心
2009年第7期955-960,共6页
Chinese Journal of Sensors and Actuators
基金
家高技术研究发展计划资助项目(863计划)(2006AA04Z337
2007AA12Z132)
国家自然科学基金资助(50830202
60774055
10776039)
关键词
自供能
磁电换能器
电源管理电路
无线传感器
self-powered, magnetoelectric transducer, power management circuit, wireless sensor
