摘要
为了能使地铁站内乘客求助信息快速、可靠地传输,又方便系统的安装与维护,采用了单片机控制无线传输模块收发乘客求助信息的方案,并在无线收发模块之间添加中继器以增加传输的距离。进行地铁站内环境对无线信号衰减程度的分析,并设计了地铁站内无线乘客求助信息系统。该系统可以满足地铁站内环境下乘客求助信息的无线传输。
In order to make the transmission of passengers′ rescue information fast and reliable,and convenient for installing and maintening the system,a MCU controlled wireless transmission module was used to send and receive rescue information,and repeaters were added between wireless transceiver modules to increase the transmission distance.The attenuation of wireless signal in the subway environment is analyzed and a kind of wireless passengers′ rescue system is designed.The system can meet the transmission of passengers′ rescue in the environment of subway station.
出处
《现代电子技术》
2012年第5期137-140,共4页
Modern Electronics Technique
关键词
无线收发模块
单片机
中继器
传输距离
wireless transceiver module
MCU
repeaters
transmission distance
