微波是波长很短的无线电波,微波的方向性很好,速度等于光速。微波遇到车辆立即被反射回来,再被雷达测速计接收。这样一来一回,不过几十万分之一秒的时间,数码管上就会显示出所测车辆的车速。雷达或微波乃是类似广播传送器所发出的电波,只不过频率较高出许多。当人物或物体在微波的 感应范围内移动时,便会启动感应器。
为了找到污染物浓度和机动车数量的关系,科学家们在北京的主要路段设置了微波雷达记录每小时机动车的流量。
To study the correlation between pollutants and traffic, microwave radars have been installed at main roads in Beijing to count the vehicles on the road each hour.
型椰子干水分含量微波雷达测量仪是我公司自主开发的高性能、数字化智能型接触式定制水分测量仪表仪表。
WPR-105 type copra moisture content of microwave radarmeasuringinstrument is our self-developed high-performance, intelligent digital custom water-contact measuring instruments instruments.
本文概述军用飞行目标对微波雷达的散射特性,讨论了目标的高频散射机理,雷达截面(RCS)分析方法及减缩途径,以及低rcs目标探测技术等。
Target characteristics and high frequency scattering mechanism are summarized. RCS analysis methods, RCS reduction approaches and low RCS target detection techniques are discussed.
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