摘要
普通多普勒式报警器在被测目标慢速移动时易失灵。本文介绍测距式报警器其保护距离的整定是靠调整超声波发射与接收的时间间隔。报警可靠并能自动拨打 1 1 0 。
The Ordinagry Doppler alarm is easily out of order when the target moves slowly.The article gives on introduction of Detective Ultrasonic Antiburglar alarm,whose completeness of protective range is depended on the adjustment of the interval between transmitting and receiving .Its alarming is reliable .It can dial 110 automatically and convey prereserved sound message.
出处
《锦州师范学院学报（自然科学版）》
2002年第3期46-48,共3页
Journal of Jinzhou Normal College (Natural Science Edition)
