发明授权
- 专利标题： Method and apparatus for obtaining sectional information of the underground by measuring time differences and strength of electromagnetic signals
- 专利标题（中）： 通过测量电磁信号的时间差和强度来获取地下部分信息的方法和装置
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申请号： US838442申请日： 1992-03-09
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公开(公告)号： US5323114A公开(公告)日： 1994-06-21
- 发明人: Akio Nagamune , Koichi Tezuka , Isamu Komine
- 申请人： Akio Nagamune , Koichi Tezuka , Isamu Komine
- 申请人地址： JPX Tokyo
- 专利权人： NKK Corporation
- 当前专利权人： NKK Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-194083 19900724; JPX2-250082 19900921
- 主分类号： G01S13/02
- IPC分类号： G01S13/02 ; G01S13/88 ; G01V3/30 ; G01V3/12
摘要：
An underground radar tomography in which an electromagnetic wave is radiated into the ground, the amplitude and propagation time of a transmitted wave, a reflected wave or a diffracted wave of the electromagnetic wave are measured at a number of points, and signal processing is performed on the result of measurement to thereby obtain the distribution of strata and soil in the ground as section information with a high accuracy. By use of two pseudo random signals which are slightly different in period but the same in code pattern, measurement time which is expanded relative to propagation time is obtained to thereby make the measurement accuracy high.
公开/授权文献
- US4660057A Heater power controller for ink jet printer 公开/授权日：1987-04-21
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