低功耗无线传感终端网络系统设计与实现

Design and Implementation of the Wireless Sensing Terminal Network System with Low Power Consumption

针对无线传感网络系统中终端节点、中继器等设备存在的低功耗技术需求,以MSP430芯片为核心,设计一种对环境温湿度等参数进行检测的低功耗无线传感终端网络系统。为了降低节点功耗,在ZigBee协议栈基础上进行改进,设计了传感终端节点的正常、监控和维护三种工作模式,使传感终端和中继器节点能够按照实际需求控制采样时机和速率,以降低传感节点用于无线通信的能量开销。实测结果表明,该无线传感器网络系统功能可靠,技术指标达到了系统节点低功耗设计目标。

To fulfill the technical requirement of low power consumption for the equipment such as terminal nodes and repeaters in wireless sensing network, the wireless sensing terminal network system with low power consumption for detecting environment parameters of temperature and humidity, etc. , has been designed using MSP430 as the core. In order to reduce node power consumption, on the basis of ZigBee stack protocol, improved design for three of the operating modes, i. e. , normal, monitoring and maintenance of the nodes is conducted. Thus the sensing terminal and repeaters can control the timing and rate of sampling in accordance with actual requirements, to reduce the costs of energy for sensing nodes on wireless communication. The result of practical rests indicates that the functions of this wireless sensing network are reliable ; its technical specification reaches the design objective of low power consumption.