基于无线传感器网络的低功耗目标探测系统设计与实现

基于无线传感器网络的目标探测系统利用磁场、振动、声音等环境参数的变化实现对移动目标的探测。针对无线传感器网络的能量受限问题，从传感器节点硬件选型、节点休眠设计、网络拓扑结构设计和数据传输协议设计等方面出发，进行系统低功耗设计优化。实验结果表明，该探测系统在传感器节点采用容量4 A·h锂电池，采样率10 Hz情况下，平均工作电流仅为3.78 mA，连续工作时长可达33天。

Design and implementation of low-power target detection based on wireless sensor network

A target monitoring system based on the wireless sensor network works by precepting the changes of the magnetic field, the vibration, the sound and other kinds of signals. In view of the constrained energy supply for the wireless network, a low-power design is proposed, which includes the selection of the sensor chips, the dormancy design of nodes, the determination of the network topology, and the data transmission protocol. It is shown that the average working current of the sensor system is only 3.78 mA with a configuration of 4 A·h lithium battery and a sampling rate of 10 Hz for each node, to be run continuously for 33 days.