Design of an infrared alarm system

According to the advantages of infrared,such as high concealment,confidential,usable day and night,and strong anti-interference ability,etc.,a kind of infrared alarm system is designed.This system consists of two parts: son alarm system and father alarm system.Passive infrared sensor and single-chip microcomputer and Microsoft Visual Studio 2008 are selected to realize all the functions of the system,and test and inspection are completed.The signal is detected by pyroelectric infrared sensor and amplified to enter into the single-chip as inputs.The voice and alarm,flashing lights,wireless transmission,serial communication are controlled by single-chip.In the end,receive and alarm are realized by the alarm system software in the computer.The purpose of offsite dual alarm is achieved.