有限空间WIFI无线信号覆盖测量系统设计

Design of measurement system for WIFI Wireless signal in limited space

针对矿井有限空间环境的特殊性和矿井WIFI信号覆盖存在的问题,根据无线电波在有限空间中复杂的传播方式,设计了一种有限空间WIFI无线信号覆盖测量系统。该系统采用单片机硬件技术和Labview软件平台开发了一种基于USB总线的便携式功率计,作为无线信号强度测量设备,以精密电压控制的压控振荡器作为点频信号源,完成对有限空间WIFI无线信号强度数据的采集、接收、分析和图形化显示。通过对陕北某煤矿井下巷道中2.4GHz的WIFI无线电波信号进行覆盖测试,得到了巷道无线信号强度数据,验证了该系统运行稳定,能准确、客观、高效地反映有限空间WIFI信号的覆盖质量,为今后研究有关井下无线电传播规律奠定了基础。

Aiming at the specific characteristics of mine limited space and the problem of mine WIFI signal coverage,according to the transmission of the radio waves in the complex limited space,this paper designs a WIFI wireless signal coverage measurement system in limited space.The precision voltage controlled VCO of Sweep Oscillator is used as frequency signal source,and a Portable Microwave Power Meter based on USB bus,which is developed by single-chip hardware technology and Labview Software platform,is used as wireless signal strength measuring equipment.As a result,the system can complete the limited space WIFI signal strength data collection,acquisition,analysis and graphical display.Through the coverage test of 2.4GHz WIFI wireless signal in coal mine tunnels of the north of Shaan＇xi,the data of wireless signal strength in tunnels is obtained.Moreover,it is verified that the system works steadily,and can reflect coverage quality of limited space WIFI signal accurately,objectively and efficiently.It can lay the foundation to the next research of the wireless for underground radio propagation law.