Full-Wave Modeling and Inversion of UWB Radar Data for Wave Propagation in Cylindrical Objects

被引：2

作者：

Gao, Lan ^{[1
,2
]}

Dachena, Chiara ^{[3
]}

Wu, Kaijun ^{[2
]}

Fedeli, Alessandro ^{[3
]}

Pastorino, Matteo ^{[3
]}

Randazzo, Andrea ^{[3
]}

Wu, Xiaoping ^{[1
]}

Lambot, Sebastien ^{[2
]}

机构：

[1] Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China

[2] Catholic Univ Louvain, Earth & Life Inst, B-1348 Louvain La Neuve, Belgium

[3] Univ Genoa, Dept Elect Elect Telecommun Engn & Naval Architec, I-16145 Genoa, Italy

来源：

REMOTE SENSING | 2021年 / 13卷 / 12期

关键词：

full wave inversion; ground penetrating radar; cylindrical objects; GROUND-PENETRATING RADAR; FORM GREENS-FUNCTIONS; NEAR-FIELD; LAYERED MEDIA; STRATIFIED MEDIA; TREE TRUNKS; GPR; COMPUTATION;

D O I：

10.3390/rs13122370

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The nondestructive characterization of cylindrical objects is needed in many fields, such as medical diagnostics, tree trunk inspection, or concrete column testing. In this study, the radar equation of Lambot et al. is combined with cylindrical Green's functions to fully model and invert ultra-wideband (UWB) ground-penetrating radar (GPR) data and retrieve the properties of cylindrical objects. Inversion is carried out using a lookup table (LUT) approach followed by local optimization to ensure retrieval of the global minimum of the objective function. Numerical experiments were conducted to analyze the capabilities of the developed inversion procedure to estimate the radius, permittivity, and conductivity of the cylinders. The full-wave model was validated in laboratory conditions on metallic and plastic pipes of different sizes. The adopted radar system consists of a lightweight vector network analyzer (VNA) connected to a single transmitting and receiving horn antenna. The numerical experiments highlighted the complexity of the inverse problem, mainly originating from the multiple propagation modes within cylindrical objects. The laboratory measurements demonstrated the accuracy of the forward modeling and reconstructions in far-field conditions.

引用

页数：18

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