摘要
近年来,国内煤矿事故频发,保障矿工的安全,研制井下监测系统越来越体现其重要性。提出一种利用CC2420无线收发芯片的井下无线定位方案。方案基于射频芯片CC2420和单片机ATmega128为核心的无线传感器网络硬件节点,使用RSSI值进行测距,依据固定的信标点布置进行两点定位。在收到多个信标的时候,将定位结果在数学上求平均,提高定位精度,同时,方案也对一些因为测距误差造成无法定位的情况作了分析。仿真结果表明:在一定的网络连通度条件下,本方案是一个简单、快速的井下实用性定位方案。
In the past few years, inland coal mine accidents are always reported to the public. So protecting mine workers from danger and the research of underground detecting system becomes more and more important. A kind of underground wireless localization scheme is put forward based on CC2420. In this scheme RSSI value is used for ranging and unknown nodes are located according to the beacon node with fixed position,which based on hardware nodes made up with CC2420 and ATmega128. When unknown nodes receive several beacon node＇ s information, the estimate position call be averaged on math in order to improve location accuracy. At the same time, some situation such as location failure for the range error is also discussed in the scheme. Simulation results demonstrate that the scheme is a simple fast underground practicable location scheme in the condition of good networks ＇ connection.
出处
《传感器与微系统》
CSCD
北大核心
2008年第2期89-92,共4页
Transducer and Microsystem Technologies
基金
上海市重点学科建设计划资助项目(065115018)
