Developing a Realistic Numerical Equivalent of a GPR Antenna Transducer Using Global Optimisers

IF 1.1 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS

Near Surface Geophysics Pub Date : 2023-10-25 DOI:10.1002/nsg.12280

Ourania Patsia, Antonios Giannopoulos, Iraklis Giannakis

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引用次数: 0

Abstract

Abstract Numerical modelling of Ground Penetrating Radar (GPR) has been widely used for predicting and assessing its performance. Since the transmitter and the receiver are the most essential components of a GPR system, an accurate representation of them should be included in a model. Simulating a real system is particularly challenging, especially when it comes to commercial GPR systems. A three‐dimensional model based on a 2000 MHz “palm” antenna from Geophysical Survey Systems, Inc. (GSSI) is presented in this paper. The geometric features of the transducers were modelled via visual inspection while their unknown dielectric properties were estimated using global optimisers in order to minimise the differences between real and synthetic measurements. In particular, the antenna was calibrated in free space and on top of a metal plate. Subsequently, the resulting model was successfully tested in various case studies to assess its performance. Models of two units of the same transducer were developed, showing that units of the same system in general are not identical. The results, support the premise that global optimisers can be used to provide information on key aspects of the dielectric structure of the transducer and allow us to accurately model its behaviour in various environments. This article is protected by copyright. All rights reserved

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利用全局优化器开发GPR天线换能器的实际数值等效

摘要探地雷达的数值模拟在预测和评估探地雷达性能方面有着广泛的应用。由于发射器和接收器是探地雷达系统最重要的组成部分，因此在模型中应包括对它们的准确表示。模拟一个真实的系统是特别具有挑战性的，特别是当涉及到商业GPR系统时。本文提出了一个基于地球物理测量系统公司(GSSI)的2000 MHz“手掌”天线的三维模型。换能器的几何特征通过目视检查建模，同时使用全局优化器估计其未知介电特性，以尽量减少实际测量和合成测量之间的差异。特别是，天线是在自由空间和金属板的顶部校准的。随后，结果模型成功地在各种案例研究中进行了测试，以评估其性能。开发了同一换能器的两个单元的模型，表明同一系统的单元通常不相同。结果支持这样一个前提，即全局优化器可用于提供换能器介电结构关键方面的信息，并允许我们准确地模拟其在各种环境中的行为。这篇文章受版权保护。版权所有

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Near Surface Geophysics 地学-地球化学与地球物理

CiteScore

3.60

自引率

12.50%

发文量

审稿时长

6-12 weeks

期刊介绍： Near Surface Geophysics is an international journal for the publication of research and development in geophysics applied to near surface. It places emphasis on geological, hydrogeological, geotechnical, environmental, engineering, mining, archaeological, agricultural and other applications of geophysics as well as physical soil and rock properties. Geophysical and geoscientific case histories with innovative use of geophysical techniques are welcome, which may include improvements on instrumentation, measurements, data acquisition and processing, modelling, inversion, interpretation, project management and multidisciplinary use. The papers should also be understandable to those who use geophysical data but are not necessarily geophysicists.