无线传感网络节点环境监测模拟装置设计

Design of wireless sensing node environmental monitoring simulator

本装置是由1个监控终端2、个探测节点和耦合线圈构成的一套无线环境监测模拟装置。监控终端与探测节点各含1套无线收发电路,采用振幅键控ASK调制方式,收发共用一个5圈直径为5cm铜丝天线,实现了监控终端与探测节点之间的无线数据通信。信号发射端由载波产生电路、功放电路、耦合线圈匹配电路组成,信号接收端由检波电路、调理放大电路、整形电路、解码电路构成。本装置采用具有低功耗特性的MSP430单片机作为主控制器,实现了载波信号的产生、发射信号的调制与接收信号的解调,具有电路简单、低功耗、自动识别、通讯距离远、组网方便等特点。

This system is a set of wireless environmental monitoring simulation device,consisting of a monitoring terminal,two detection nodes and coupling coils.The monitoring terminal and the detection nodes contain a wireless transceiver circuit each,adopting the amplitude keying ASK modulation,with the transceivers sharing one common antenna,to achieve the wireless data communications between the monitoring terminal and the detection nodes.The signal transmitter is composed of carrier generating circuits,power amplifier circuits,and coupling coil matching circuits,while the signal receiver is composed of detector circuits,conditioning amplifier circuits,shaping circuits,and decoding circuits.The device uses a MSP430 with low-power features as the main controller,to accomplish the carrier signal generation,transmit signal modulation and the received signal demodulation.This device is characterized of simple circuits,low power,automatic identification,a long communication distance and establishment network easily.