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1.概述近年来,随着科学技术的迅速发展,出现了多种多样的报警装置。目前,已经投入使用的有:电子、声学、光学、微波、红外等几大类的报警装置。其中红外报警器由于具有隐蔽性好,保密性强,不易被破坏和干扰等特点,在国内外均受到高度重视,发展也极其迅速。红外报警器根据其工作方式不同,可分为主动式与被动式两种类型。被动式的探测器目前应用最多的是热释电元件,封锁距离一般为50～60m,仅能封锁一个扇形面或一条线,
1. Overview In recent years, with the rapid development of science and technology, there have been a variety of alarm devices. At present, it has been put into use: electronic, acoustic, optical, microwave, infrared and other major categories of alarm devices. Among them, the infrared alarm has been highly valued at home and abroad because of its characteristics of good concealment, high confidentiality, easy to be destroyed and interference, and the development is extremely rapid. Infrared alarm according to their different working methods can be divided into active and passive two types. Passive detectors are currently the most widely used pyroelectric components, the blocking distance is generally 50 ~ 60m, only blocked a fan-shaped surface or a line,