小型雷达报警器是一种新型的无接触式的报警装置,具有灵敏度高、监视范围大等特点,它不受雨雾或其它气候条件影响,在一些重要部门可用于室内外安全报警。它的工作原理是利用发射的无线电波在移动目标产生回波的多卜勒效应进行工作的。应用这种原理设计的小型微波报警系统能够探测8米范围内的任何移动物体。另外,还有利用回波讯号幅度的变化来实现报警,其作用范围大约在15米之 Small radar alarm is a new type of contactless alarm device, with high sensitivity, large monitoring range, it is not affected by rain or other climatic conditions, in some important departments can be used for indoor and outdoor safety alarm. It works by using the Doppler effect of the transmitted radio waves that produce echoes at the moving targets. A small microwave alarm designed with this principle can detect any moving object within 8 meters. In addition, there is the use of changes in the amplitude of the echo signal to achieve the alarm, its scope of action is about 15 meters