Abstract
This paper briefly introduced the principle of works and design methods of the automatic fire alarm fire control system. With the knowledge of SCM, the paper designs a fire alarm control system, which can have the functions of the multi-temperature acquisition, display and alarm.
In this paper, automatic fire alarm system hardware circuits is designed by the chip 89C51 to dominate the system , temperature sensors DS18B20, decoding drive chips 74ALS574, digital display and other element, which can do the multi-channel collection of temperature, analyze, display temperature and alarm when the circuit is open. In addition, it has also the show circuit of linkage part.
Basing on the needs of the system, the paper applies the idea of modularization to the design of software that has flow charts. The sequence can complete to initialize the sensor, collect and analyze the temperature signal; alarm when the fire occurs and the system turn off. The sequence is debugged successfully.
This system can alarm in time when the fire occurred in the case of accident, which has the advantages of high precision, strong sensitivity, and wide range of application, especially it would be suitable for use industrial and civil buildings.