摘要
针对目前对WiFi通信在综采工作面特定环境下的应用研究较少的问题,结合无线信号空间传播理论分析了WiFi信号在综采工作面的传播特性,分析结果表明:在综采工作面,WiFi信号的传播受到较大影响,尤其是信号覆盖范围明显减小;在综采工作面WiFi无线信号传播符合对数距离路径损耗模型。根据综采工作面的空间布局特点,采用快速漫游和Mesh网络技术构建了无死区、全覆盖的综采工作面WiFi通信网络优选技术方案。测试结果表明,该方案可解决采煤机机载视频通信难题,实现了WiFi网络快速漫游功能,可有效保证移动终端的应用效果,整个网络的平均通信吞吐量约为35 Mbit/s,最低通信吞吐量约为7Mbit/s,能够满足大多数综采工作面的通信需求。
At present,there are problems about few application research of WiFi communication in the specific environment of fully mechanized coal mining face,propagation characteristics of WiFi signal on the fully mechanized coal mining face were analyzed combined with wireless signal spatial propagation theory.The analysis results show that on the fully mechanized coal mining face,the WiFi signal propagation is greatly affected,especially the signal coverage is obviously reduced;the WiFi signal propagation on the fully mechanized coal mining face conforms to log-distance path loss model.According to the spatial layout characteristics of fully mechanized coal mining face,an optimal technical scheme of no-dead zone and full coverage WiFi communication network of fully mechanized coal mining face was constructed by fast roaming technology and Mesh network technology.The test results show that the scheme can solve the problem of video communication on the shearer,and realize fast roaming function of WiFi network,can effectively ensure the application effect of the mobile terminal,and the average communication throughput of the whole network is about 35 Mbit/s,the minimum communication throughput is about 7 Mbit/s,which can meet most of the communication needs on fully mechanized coal mining face.
作者
高思伟
李森
GAO Siwei;LI Sen(Beijing Tiandi-Marco Electro-Hydraulic Control System Company Ltd.,Beijing 100013,China)
出处
《工矿自动化》
北大核心
2019年第2期35-40,共6页
Journal Of Mine Automation
基金
国家重点研发计划资助项目(2017YFC0804304)
北京市科技计划智能制造技术创新与培育资助项目(Z171100000817003)
中国煤炭科工集团科技创新资助项目(2016MS014)
关键词
煤炭开采
综采工作面
WiFi通信网络
采煤机视频通信
对数距离路径损耗模型
通信吞吐量
快速漫游
Mesh网络技术
coal mining
fully mechanized coal mining face
WiFi communication network
video communication of shearer
log-distance path loss model
communication throughput
fast roaming
Mesh network technology
