Abstract:

Based on STC12C5A60S2 single- chip computer, a multi- functional monitoring system for household use is designed, which has the characteristics of low development cost, synchronous display of multi-sensor data on online and offline terminals, special voice flash alarm for fire characteristic parameters locally, and synchronous color change alarm for online APP client interface. Firstly, fire signals are monitored in real time by infrared flame, photoresistor, temperature, humidity, poisonous gas and smoke sensor modules. Then, the characteristic parameters of these signals are processed by A/D conversion and algorithm analysis in sequence. Then, a micro-network is constructed by Bluetooth wireless transmission and serial communication technology to realize data remote distance transmission,and with the help of easy language, PC Android APP development environment, LCD, start and stop function keys, decoding chip, relay group and multi-channel voice playback board,build online and offline monitoring and alarm terminal. The experimental results show that the system has strong control lability and real-time, the rate of missed and false alarm of home fire is further reduced, and the user's response ability to alarm signal is also improved.

Key words: single chip computer, terminal monitoring, special alarm, intelligent Internet of Things