Abstract:

On the basis of the traditional human body phyoelectric infrared switch,motor-based mechanical parts are added to drive the pyroelectic sensor moving cyclically,so that the pyroelectric sensor can scan human body even they keep still for a long time.An Atmega8 microcomputer-based controller is also added,and in cooperation with the software,the intelligent system is able to judge the environment and make a rapid action correctly.The system can be used in classrooms,offices and other place where high quality lighting is required.To save energy,the system controls the lights on where there are people,and lights off elsewhere.In addition,installation of the system requires only minor changes to the original lines.

Key words: pyroelecric sensor;photoelcetric switch;Atmega8;intelligent control