WSN节点电池供电性能测试研究

摘要

无线传感器网络的传感器节点主要依靠电池供电，为保证节点能较长时间地稳定工作，对电池的供电性能具有较高的要求。组建了一个基于ZigBee协议的节点功耗测试网络，提供了一种基于WSN的电池电压在线监测的方法，测量误差范围在1%左右，分别对镍氢电池和太阳能电池供电性能进行了测试。实验结果显示，在数据采集周期为2s~600s的情况下，用普通镍氢电池为WSN节点供电只能维持其正常工作10天左右；而使用2000mAh锂电池搭配0.7W太阳能电池板对传感器节点进行供电时，可以维持节点(在实验期间)长时间正常工作(至少11天以上)，可以为今后节点电源设计和节点生存时间估计提供有益的参考。%Sensor nodes of wireless sensor networks rely mainly on battery power. In order to ensure that the nodes can work stably for a long time,the performance of battery power supply has higher requirements. The authors have set up a network based on ZigBee protocol to test the power consumption of sensor nodes. A method for on-line mo-nitoring the battery voltage based on WSN is provided,and the performance test of Ni-MH batteries and solar battery powered have been done;the measuring error about 1%. The experimental results show that, when the data collection period is from 2 seconds to 600 seconds,the ordinary Ni-MH battery for WSN nodes power supply can maintain its normal work for 10 day,while the 2 000 mAh lithium battery with a 0. 7W solar panel powered sensor nodes can maintain the nodes to work for a long time(11 day at least) . This work provides a reference for the next node power supply design and estimation of survival time.