摘要
概要回顾了地下穿透雷达发展过程,特点,体制和主要用途。并介绍研制成的一台冲击脉冲探地成像雷达。其发射脉冲重复频率为100kHZ、脉冲宽度5ns,幅度为正负150V的双向脉冲。天线为收、发分开的领结型振子天线。用取样变换法把接收的回波变换成可显示的慢信号。发射、接收、取样变换、线性放大、对数放大、时间增益控制、积累、雷达参数改变等都是在微处理器和微机控制下进行的。雷达可用人拖动或汽车拖动进行探测,监视屏上可实时滚动地显示所探测的假彩色地下剖面图。能够同时存盘,以备事后处理。并研制了基底去除,综合孔径及一些典型图像处理软件,对地下剖面图进行处理,以提取更多信息。经实地探测,能探到3m以内的地下金属,非金属管道,能获得较清晰的湖底剖面图,探测最深水深可达8m。
This paper reviewe the developed process,character,system,and main uses of Ground Penetrating Radar. Subsurface Impulse Imaging Radar has been developed with transmitting pulse of 100kHz repeated freguency, 5ns pulse width and 150V double—direction pules amplitude. The antenna is bow — tie dipole style. The transmitting antenna and receiving one are separate. Received return wave is transformed to displayable slow signal by means of the sample transformation method. Transmitting, receiving,sample transformation,linear amplifying,logarithm amplifying,Time—Gain—Control and parameter change etc. are carried out under the control of microcomputer. Radar is operated by man — pulled or truck — carried. False color image of subsurface profile can be displayed on computer CRT with real — time rolling, and recorded for later treatment. Base elimination, synthetic aperture and some typical image processing software are developed for abstracting more information. Metal and non-metal pipe lying underground no deeper than 3m can be probed. Fairly cleaning,profile of lake bed is obtained with 8m deepest depth.
出处
《遥感技术与应用》
CSCD
1993年第3期1-7,共7页
Remote Sensing Technology and Application
基金
国家自然科学基金
关键词
探地雷达
脉冲成像雷达
Subsurface penetrating radar
Impulse imaging radar
Bow—tie antenna
