A three-layer model for digital communication in a mine is proposed. Two basic platforms are discussed: A uniform transmission network and a uniform data warehouse. An actual,ControlNet based,transmission network plat...A three-layer model for digital communication in a mine is proposed. Two basic platforms are discussed: A uniform transmission network and a uniform data warehouse. An actual,ControlNet based,transmission network plat-form suitable for the Jining No.3 coal mine is presented. This network is an information superhighway intended to inte-grate all existing and new automation subsystems. Its standard interface can be used with future subsystems. The net-work,data structure and management decision-making all employ this uniform hardware and software. This effectively avoids the problems of system and information islands seen in traditional mine-automation systems. The construction of the network provides a stable foundation for digital communication in the Jining No.3 coal mine.展开更多
接收信号强度(received signal strength,RSS)浮动和无线接入点缺失是制约无线局域网(wirelesslocal area network,WLAN)定位精度的主要问题。利用智能终端已有的MARG(magnetic,angular rate,andgravity)传感器,设计了基于粒子滤波和卡...接收信号强度(received signal strength,RSS)浮动和无线接入点缺失是制约无线局域网(wirelesslocal area network,WLAN)定位精度的主要问题。利用智能终端已有的MARG(magnetic,angular rate,andgravity)传感器,设计了基于粒子滤波和卡尔曼滤波的数据融合算法,实现了一个低成本高精度的WLAN/MARG组合定位系统。该系统利用WLAN和MARG定位技术的互补特性,有效校正了由RSS浮动引起的定位误差和由传感器噪声引起的累积误差。室内WLAN环境下的实验结果表明,本文所提系统,相比WLAN和MARG定位系统,定位均方根误差分布减少了62%和91%,并且有效扩大了系统应用范围。展开更多
基金Project 50574094 supported by the National Natural Science Foundation of China
文摘A three-layer model for digital communication in a mine is proposed. Two basic platforms are discussed: A uniform transmission network and a uniform data warehouse. An actual,ControlNet based,transmission network plat-form suitable for the Jining No.3 coal mine is presented. This network is an information superhighway intended to inte-grate all existing and new automation subsystems. Its standard interface can be used with future subsystems. The net-work,data structure and management decision-making all employ this uniform hardware and software. This effectively avoids the problems of system and information islands seen in traditional mine-automation systems. The construction of the network provides a stable foundation for digital communication in the Jining No.3 coal mine.
文摘接收信号强度(received signal strength,RSS)浮动和无线接入点缺失是制约无线局域网(wirelesslocal area network,WLAN)定位精度的主要问题。利用智能终端已有的MARG(magnetic,angular rate,andgravity)传感器,设计了基于粒子滤波和卡尔曼滤波的数据融合算法,实现了一个低成本高精度的WLAN/MARG组合定位系统。该系统利用WLAN和MARG定位技术的互补特性,有效校正了由RSS浮动引起的定位误差和由传感器噪声引起的累积误差。室内WLAN环境下的实验结果表明,本文所提系统,相比WLAN和MARG定位系统,定位均方根误差分布减少了62%和91%,并且有效扩大了系统应用范围。