Detection of Root Orientation Using Ground-Penetrating Radar
Detection of Root Orientation Using Ground-Penetrating Radar
复制标题
使用探地雷达检测根部方向
DOI：
10.1109/tgrs.2017.2737003
复制
发表时间：
2018
影响因子：
8.2
通讯作者：
Cao Xin
中科院分区：
文献类型：
--
作者：
Liu Qixin;Cui Xihong;Liu Xinbo;Chen Jin;Chen Xuehong;Cao Xin
探地雷达（GPR）由于其原位和非破坏性的性质，最近被应用于植物根系的野外调查。根系和周围土壤之间的差异产生介电常数对比，在GPR雷达图上形成清晰的双曲线反射。来自根部的反射信号的强度和形状基本上受根部取向以及地下中的根部与地面上的GPR勘测方向之间的相对几何形状的影响。然而，没有以前的研究利用的信息的强度和形状的根的GPR反射映射其方向，这是至关重要的解释雷达图和重建三维根系结构。本文首先从电磁波传播的基本原理出发，推导了单根形成的双曲反射的数学表达式。利用该公式对模拟数据和地质雷达实测数据进行了曲线拟合。根据公式系数反演得到了单根的水平方向和垂直方向的信息。分析了该方法的应用条件和影响根系方位信息提取的因素。结果表明，相当精确的根方向估计。该方法拓展了探地雷达在根系调查中的应用，推进了无创根系构型制图的前沿。
Due to its in situ and nondestructive nature, ground-penetrating radar (GPR) has recently been applied to the field investigation of plant roots. The discrepancy between the roots and surrounding soils creates a dielectric constant contrast, forming clear hyperbolic reflections on the GPR radargram. The intensity and shape of the reflecting signals from roots are substantially affected by the root orientation as well as the relative geometry between the root in the subsurface and the GPR survey direction on the ground surface. However, no previous study has utilized the information on the intensity and shape of a root’s GPR reflection to map its orientation, which is crucial in interpreting radargrams and rebuilding 3-D root system architecture. In this paper, a mathematical formulation of hyperbolic reflection formed by a single root was first deduced based on the principles of electromagnetic wave propagation. Then, using this formulation, curve fitting was conducted on both simulated and field collected data sets by GPR. Information on the horizontal orientation and vertical inclination of a single root was acquired according to the formulation coefficient retrievals. Conditions for this method of application and factors impacting the extraction of root orientation information were analyzed. The results indicated fairly precise root orientation estimations. The proposed method has extended the application of GPR in root investigation, thus advancing the frontier of noninvasive root system architecture mapping.
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影响因子：
0.9
作者：
G. Leucci
通讯作者：
G. Leucci
DOI：
--
发表时间：
2004-06
期刊：
Proceedings of the Tenth International Conference on Grounds Penetrating Radar, 2004. GPR 2004.
影响因子：
--
作者：
S. Shihab;W. Al-Nuaimy;A. Eriksen
通讯作者：
S. Shihab;W. Al-Nuaimy;A. Eriksen
影响因子：
0.7
作者：
Lorenzo, H.;Perez-Gracia, V.;Armesto, J.
通讯作者：
Armesto, J.
DOI：
--
发表时间：
2012
期刊：
--
影响因子：
--
作者：
C. Jin
通讯作者：
C. Jin
影响因子：
--
作者：
A. Stokes;T. Fourcaud;J. Hruška;J. Cermak;Nadezhda Nadyezdhina;V. Nadyezhdin;L. Praus
通讯作者：
A. Stokes;T. Fourcaud;J. Hruška;J. Cermak;Nadezhda Nadyezdhina;V. Nadyezhdin;L. Praus