超声多普勒防盗报警系统的抗干扰研究

Research in Anti-interference of Ultrasonic Doppler Burglar Alarm System

超声 Doppler防盗报警器是基于多普勒原理研制的一种新型防盗报警器装置 .本文着重对其设备系统的干扰来源、进入仪器途径及解决方法进行了深入研究 ,给出了多种不同电路对设备噪声干扰进行消除的方法 .实验结果表明 :该方法能有效地抑制系统噪声 ,较好地解决了设备中入侵信号与干扰信号的辨别问题 ,收到了良好的实验效果 .

An ultrasonic Doppler acoustic burglar alarm is a new type of burglar alarm equipment developed based on Doppler principle. The interference source of the equipment, way of interference intering the equipment and the methods of inhibiting or eliminating the interference are discussed in detail. Several circuits are proposed for inhibiting the interference. Experimental results show that the methods presented in this paper can effectively identify and inhibit interference signals of the acoustic burglar alarm.