摘要
设计并实现了一种具有两级能量存储结构的传感器网络能量自供给节点系统EasiSolar。该系统将价格较低且可无限次充放电的电容与能量密度高且漏电流较小的可充电锂电池结合起来,形成高效的能量存储单元,以减少锂电池的充放电次数,延长锂电池的使用寿命。该系统还通过软硬件协同设计,实现了高效的能量管理方法,包括太阳能电池板最大功率输出跟踪器、能量存储模块充电管理模块和供电选择模块,以最大化地获取环境能量。测试实验结果表明,使用该系统设计的能量采集方法能够至少提高28%的能量采集效率。
EasiSolar--An intelligent and high-efficiency solar energy harvesting sensor node for wireless sensor networks is designed and implemented. A two-stage energy storage structure is adopted to take the advantages of both the low cost capacitors with infinite rechargeable cycles and the Lithium-battery with high energy leakage current. Software/hardware co-design methods, including maximum power point tracker （ storage charging -density and low MPPT） , energy management and power switch control modules are proposed to improve and optimize the energy management and maximize the energy harvest. Test experiment results show that the solar energy output efficiency is improved by 28% using the implemented energy harvest method.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2012年第9期1952-1960,共9页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(61100180)
"新一代宽带无线移动通信网"国家科技重大专项(2010ZX03006-003-02)
工信部
财政部物联网专项"物联网应用中间件研发及产业化"项目资助
关键词
无线传感器网络
能量采集系统
两级能量存储
软硬件协同设计
wireless sensor networks （WSNs）
energy-harvesting system
two-stage energy storage
software/ hardware co-design
