Design And Development Of Air Quality Monitoring System

The monitoring of the environment started recently but develops rapidly in our country. As an important component of environment monitoring, air quality monitoring has been paid more attentions on now.AQMS (Air Quality Monitoring System) can monitor air quality automatically and continuously. It includes three levels in function. In first level, the central server can collects data from substation and control all the relevant computers and instruments. The substation computers is the second level, they can communicate with central server through PSTN ( Public Switched Telephone Network), they also collect data from instruments of its own and control them. The last level is composed of monitoring instruments that collect data from outer air. It is the base of the whole system. We set a Modem via RS-232 interface on two computers to realize the telecommunication. This article emphasizes on the processes and methods of collecting and processing data, resolves the questions of response and data alarm, and strengthens the functions of reports and diagrams.