指点标工作状态及机房环境参数显示系统的设计与实现

Design of Display System for Environmental Parameter in Machine Room and Working Conditions of Marker Beacon

该系统实现机场导航设备——645型指点标的换机或关机告警信息的显示,并通过通信电缆将其实时监测到的机房温、湿度参数传回该系统显示,同时具有不掉电的时钟显示和对表功能。经过对指点标设备的分析研究,从设备控制线采集,设备状态信号并将机房环境参数经过传感器采集,送到单片机AT89C52和大规模可编程逻辑器件CPLD电路进行处理,通过16×16的点阵和4只数码管、充分利用单片机的定时中断及外部中断资源实现指点标告警信息的汉字动态显示及当前温、湿度值数码显示。目前系统运行正常,解决了无人值守台的遥控问题。

This system can realize displaying of turnoff alarming information or exchanging of marker beacon,which is one of navigation equipments in airdrome and is 645 model. The temperature and humidity parameters of machine room measured with real- time means are sent back to the system to de displayed through the communication cable. Furthermore,this system has the function which displays real - time clock and adjusts clock. After analyzing marker beacon, collecting state - signals of the equipment from control line and delivering them to AT89C52 ,which is SCM and CPLD that is complex programmable logic device to be processed together with condition parameters of machine room gathered by sensors. The system can display the alarming information of marker beacon dynamically in Chinese characters on the LED dot - matrix that is 16 multiply 16 and display the numbers of temperature and humidity currently through 4 nixie tubes. The timing interrupt resources and exterior interrupt resources of AT89C52 are taken full advantage of when devising. Now, the system can run normally and solve the remote control to nobody on duty.