Design Of Home Safety Monitoring System

Science and technology has brought up the life altering from day to day, A lot of electron product extremely large life of convenient people. People lives in enjoying comfort, and there exist in hidden trouble,such as conflagration, gas poisoning etc. With regard to such problem,at first, people thinks that taking precautions against it.Now, the technology has provided possibility for this purpose.To monitor harmful gas, the abnormal temperature etc, we adopt hardwares such as AT89C51monolithic machine, the DS18B20temperature sensor, gas sensitive resistor.being based on detection systems principle,we analyse works of detecting interior temperature, gas, and Infrared ray, with Protel99SE software for running the circuit schematic drawing and PCB diagrams.We adopt the assembly language programming,and have realized three functions.we link up each other by RS-485bus, and the detecting data conducts are transfered to the monolithic machine, It can realize the purpose of giving an alarm.The system connects up a power source,then it begins to work.It can detect the interior temperature, gas,and Infrared ray.The Design has Effect in advance,and Has realized the purpose that safety protects to the home.When danger happens,the system send out a warning at the first time, so,it can reduce household losses.