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彭凌星,何现启,朱自强. 钻孔地质雷达天线收发信号数值模拟[J]. 科学技术与工程, 2020, 20(1): 69-74.
Peng Lingxing,He Xianqi,Zhu Zi-qiang.Numerical Simulation Study on the Transmission and Receiving Signal of Borehole Radar Antenna[J].Science Technology and Engineering,2020,20(1):69-74.
钻孔地质雷达天线收发信号数值模拟
Numerical Simulation Study on the Transmission and Receiving Signal of Borehole Radar Antenna
投稿时间:2019-04-19  修订日期:2019-09-21
DOI:
中文关键词:  钻孔地质雷达 天线长度 收发信号 数值模拟
英文关键词:borehole  radar antenna  length transmission  and receiving  signal numerical  simulation
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
        
作者单位
彭凌星 湖南省交通规划勘察设计院有限公司
何现启 湖南省交通规划勘察设计院有限公司
朱自强 中南大学地球科学与信息物理学院
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中文摘要:
      为了解决钻孔地质雷达数值模拟中天线长度的影响,本文通过理论推导和数值计算研究了天线中电流于电压的相互转换。对于发射的信号,我们首先根据激发的电压与的卷积得到天线中电流的分布,从而得到计算区域的电场;对于接收信号接收天线处的电场与卷积得到该无限小的天线电流强度,然后根据天线长度对其进行积分得到天线总电流的大小,与接收天线的负载电阻相乘即可得到该时刻接收到的电压大小。通过理论计算以及数值模拟实例得到的结果表明接收信号波形与发射信号波形基本相同。证明了在考虑天线长度的前提下,根据文中算法得到的收发信号表达式是准确的。
英文摘要:
      In order to solve the influence of antenna length on the numerical simulation of borehole ground penetrating radar, this paper studies the mutual conversion of current to voltage in the antenna through theoretical derivation and numerical calculation. For the transmitted signal, we first obtain the current distribution in the antenna according to the convolution of the excitation voltage and the electric field in the calculated area.For the electric field and convolution at the receiving antenna of the received signal, the infinitesimal current intensity of the antenna is obtained, and then the total current of the antenna is obtained by integrating the length of the antenna. The voltage received at that time can be obtained by multiplying the load resistance of the receiving antenna. The results of theoretical calculation and numerical simulation show that the received signal waveform is basically the same as the transmitted signal waveform. It is concluded that the expression of the received and received signals based on the proposed algorithm is accurate under the premise of considering the antenna length.
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