一种新型的基于WSN的航标网络监控系统

针对山区航道航标系统环境的GPRS 信号差和直接GPS 定位困难，本文研究和设计
了一种基于WSN 和DGPS 进行通信和定位的航标网络监控系统。实验中利用ARM 板的LED 灯亮数来表示通信信号强度的方法来测试节点在空旷区和树林里的通信的距离；用CC2420 提供的RSSI 测距功能进行定点测试进行曲线拟合的方法测定参数，并与高精度定位DGPS 结合进行监控系统的定位模拟测试，测试结果表明该方案能达到监控精度在2.5m 左右的定位精度。
关键词：无线传感器网络，差分全球卫星定位系统，基于接收信号强度指示，航标监控
Abstract: Aiming at the difficulties of direct GPS locating and the weak or without GPRS
signals in the pharos system among mountain waterway, this paper studies and works out a type of navigation marks-monitored network system based on WSN and DGPS. In the tests, we tested communicating distance of nodes by measuring the signal strength both in open region and wooden region in recording the number of flashing LED on ARM board with CC2420 chip, and test out relative parameters in some fixed points using RSSI provided by CC2420 with a method of least square curve fitting. A simulated locating test of monitoring system is generated with a result of 2.5m-precision achieved in the designed system after a combination using of RSSI with tested parameters and high-precision DGPS.
Key words : WSN， DGPS， RSSI，Monitoring of Pharos