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一、前言早期安防报警业利用人体红外热辐射特性,开发出被动式红外探测器(Passive Infared Detector,PIR):人体辐射的红外波长3~50μm,其中8~14μm占46%,最大辐射出现在约9.5μm处,人是恒温动物,红外辐射也最为稳定。被动式红外探测器本身不发射任何能量而只被动接收、探测来自环境的红外辐射。探测器安装后,在无人或动
I. INTRODUCTION Early Security Alarm Industry developed the Passive Infared Detector (PIR) based on infrared radiation characteristics of human body. The infrared radiation of human body is 3 ~ 50μm in wavelength, 46% of which is 8 ~ 14μm, and the maximum radiation appears at about 9.5μm, people are warm animals, infrared radiation is also the most stable. Passive infrared detector itself does not emit any energy but only passive receiver to detect the infrared radiation from the environment. Detector installation, no one or move