| 同轴电缆电磁波反射技术测试土体 |
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| 引用本文： | 梁志刚,陈云敏,陈仁朋.同轴电缆电磁波反射技术测试土体[J].中国农村水利水电,2004,0(12):82-84. |
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| 作者姓名： | 梁志刚 陈云敏 陈仁朋 |
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| 作者单位： | 浙江大学岩土工程研究所,浙江,杭州,310027 |
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| 摘 要： | 从电磁波传播方程出发，基于时域有限差分法（FDTD）进行离散求解，获得了适合含水量测试同轴电缆电磁波反射系统的FDTD方程。在此基础上用Matlab编制了程序进行模拟计算，并与试验曲线进行比较。经研究发现，该方法对于含水量测试同轴电缆电磁波反射系统反射曲线的模拟，当测试对象为单一介质时符合良好，当测试对象为分层介质时有一定差距，但能较准确地模拟出曲线拐点从而可用于计算介质的介电常数，为模拟同轴电缆电磁波反射系统的反射曲线的反分析提供依据。
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| 关 键 词： | 时域有限差分法 同轴电缆电磁波反射 土壤含水量 |
| 文章编号： | 1007-2284(2004)12-0082-03 |
| 修稿时间： | 2004年7月8日 |
The Simulation of Waveform of Coaxial Cable TDR System for Measuring Soil Water Content |
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| LIANG Zhi-gang,CHEN Yun-min,CHEN Ren-peng.The Simulation of Waveform of Coaxial Cable TDR System for Measuring Soil Water Content[J].China Rural Water and Hydropower,2004,0(12):82-84. |
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| Authors: | LIANG Zhi-gang CHEN Yun-min CHEN Ren-peng |
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| Abstract: | For the applications of TDR system in measuring water content, FDTD equations were obtained based on the propagation equations of electromagnetic wave. Using the equations the program was compiled in Matlab for simulation. Through comparing simulating curve and test curve it turns out that the simulating curve accords with test curve well for water content measuring TDR system in homogeneous medium, whereas the simulating curve does not for analog coaxial cable system in layered medium, although the inflexion points are shown correctly. |
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| Keywords: | FDTD time domain reflectometry soil water content |
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