| 探地雷达用于树木单根成像的模拟技术研究 |
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| 引用本文： | 白雪,纪奕才,方广有.探地雷达用于树木单根成像的模拟技术研究[J].中国农业科技导报,2011,13(1):129-136. |
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| 作者姓名： | 白雪 纪奕才 方广有 |
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| 作者单位： | (1.中国科学院电子学研究所, 北京 100190,2.中国科学院研究生院, 北京 100190) |
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| 基金项目： | 国家863计划项目(2008AA10Z205)资助。 |
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| 摘 要： | 利用超宽带探地雷达技术，以及衍射层析成像算法实现对根系的探测与成像。通过时域有限差分法，对树木根系进行建模仿真，生成探地雷达扫描数据，然后利用衍射层析成像算法对仿真数据进行目标重建，得到根系横截面反演图像。并讨论了根的直径、介电特性及其分布情况对探地雷达探测根系的影响。仿真结果表明，在近似为无损的均匀土壤中，超宽带探地雷达能快速无损地实现地下根系目标探测，衍射层技术通过重建根系图像，初步实现树根的介电属性、形状特征估计和位置标定等，因而可用于探地雷达根系探测中，对树木根系的研究具有重要意义。
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| 关 键 词： | 探地雷达 衍射层析成像算法 根系探测 |
| 收稿时间： | 2010-09-20 |
| 修稿时间： | 2011-01-19 |
Studies on Simulation Technique of Tree Single Root Imaging by Ground Penetrating Radar |
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| BAI Xue,JI Yi-cai,FANG Guang-you.Studies on Simulation Technique of Tree Single Root Imaging by Ground Penetrating Radar[J].Journal of Agricultural Science and Technology,2011,13(1):129-136. |
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| Authors: | BAI Xue JI Yi-cai FANG Guang-you |
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| Institution: | (1.Institute of Electronics, Chinese Academy of Sciences, Beijing 100190|2.Graduate School, Chinese Academy of Sciences, Beijing 100190, China) |
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| Abstract: | Diffraction tomography(DT) algorithm is derived for the detection and imaging of tree roots using ultra-wide band(UWB) ground penetrate radar(GPR) technique.A mathematical analysis model of the root in soil was built based on the finite difference time domain(FDTD) to obtain the GPR data.And the DT algorithm was used to reconstruct cross-sectional image of root.Limiting factors in the detection and reconstruction of roots,such as root diameter,permittivity and intervals were also discussed in the paper.The ... |
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| Keywords: | ground penetrating radar (GPR) diffraction tomography (DT) root detection |
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