一种可执行功耗管理的无线传感器网络节点电源

A Power for Wireless Sensor Network Nodes with Power Consumption Management Functional

为了使无线传感器网络(WSNs)节点能够执行动态电压调整(DVS)和动态电源管理(DPM),采用了独特的低功耗电源能量感知电路,通过调节电源电压、管理外围功能模块的电源,以降低节点功耗。对照实验表明,节点能够预测自己的剩余能量,可以在系统软件的配合下进行有效的DPM和DVS,关闭部分无效工作电路,并将电源电压由3.3 V降低到2 V。采用所设计的电源电路显著延长了节点的使用寿命,保证了传感器节点的工作电压不随电池电压降低而改变,从而使传感器节点在测量的长期一致性和稳定性上优于电池直接供电;使系统各个部分运行在节能模式下,较好地优化了节点能耗,提高了节点能量利用率,从而有效延长了网络的生存寿命。

A novel lower power consumption apperceive energy circuit is proposed for the sensor node of wireless sensor networks （WSNs） to administer dynamic power management（DPM） and dynamic voltage scaling （DVS） for reducing WSNs power consumption. The adjusting power monitor circuit, power voltage scaling circuit and periphery function module power management circuit are adopted. The result of experimentation shows that the nodes can forecast their remnant energy. The power management circuit designed can do DVS and DPM with system software, the voltage can be dropped to 2 V from 3.3 V. The tests show that effect of extending battery life is apparent. The nodes working voltage isn＇ t be inflected with battery voltage reducing. It is better than direct supply with battery in stability and consistency. The power consumption of nodes is optimized to increase the nodes power use and extend the network life.