THERMOPILE RADIATION FAR-INFRARED DETECTOR FOR CRIME PREVENTION

摘要

PROBLEM TO BE SOLVED: To provide a thermopile radiation far-infrared detector for crime prevention which can securely detect a trespasser entering a space irrelevantly to variation in the temperature in the space and the moving speed of the trespasser. SOLUTION: The thermopile radiation far-infrared detecting device detects the trespasser entering the space by using more than three thermopiles. The output difference between the detection value outputted by two thermopiles is compared with the output difference extracted between the mentioned different thermopiles to detect the trespasser.