Design And Implementation Of Centralized Monitoring System For Airport Navigation Station

The airport navigation station is the important place in the airport, which is responsible for the placement of the airport navigation devices. The devices of the navigation station are very precise; therefore its well-functioning had a high demand on the power and circumstance. In order to ensure the navigation equipment running stable and the plane flight secure, a centralized monitoring system of airport navigation station is designed for monitoring the power and environment parameters of the airport navigation station.With an analysis of the actual condition and monitoring demand of a airport navigation station, the contents of this system includes videos, low-voltage distribution, UPS, precise air-conditioner, humiture, fire alarm, smog, water leakage, Access control etc. Nailed down the contents, the framework of the system is designed followed, the four parts of it are monitoring devices working on the lower layer, the DVES, the distributive database application services and the monitoring clients. Basing on the ADO technology and MIDAS technology of Delphi, the distributive database is designed. The database stores the historical data of the system, so the task of the clients can be lightened efficiently.Then, the analysis of the communication data in the system was done, including monitoring video data communication and the serial data communication. For the compatibility of the monitoring devices working in the lower layer, a general serial communication protocol and the serial communication scheduling module were designed. In the serial communication scheduling module, polling mechanism, circular buffering mechanism and muti-threaded data transceiver mechanism were used to achieve serial data communication of the system. Finally, the main business functions of the system clients such as user rights management, monitor display, electronic maps, equipment configuration maintenance, system configuration and alarm log query are analyzed and demonstrated. The system has a good commonality, and it can be a mirror for the design of other monitoring system of the similar nature.