Calibration of FDTD Simulation of GPR Signal for Asphalt Pavement Compaction Monitoring

Shangguan, Pengcheng; Al-Qadi, Imad L.

doi:10.1109/tgrs.2014.2344858

Cited by 63 publications

(35 citation statements)

References 29 publications

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“…Over the past 19 years gprMax has been one of the most widely used simulation tools in the GPR community. It has been successfully used for a diverse range of applications in academia and industry [16], [17], [18], [19], [20], [21], and has been cited more than 200 times since 2005 [22].…”

Section: A Gprmaxmentioning

confidence: 99%

An evaluation of Finite-Difference and Finite-Integration Time-Domain modelling tools for Ground Penetrating Radar antennas

Warren

Pajewski

Ventura

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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Abstract-The development of accurate and realistic models of Ground Penetrating Radar (GPR) antennas is being driven by research into quantitative amplitude information from GPR, improved GPR antenna designs, and better-performing forward simulations that can feed into inversion algorithms. The FiniteDifference Time-Domain (FDTD) method and Finite-Integration technique (FIT) are popular numerical mehtods for simulating electromagnetic wave propagation. Time-Domain methods are particularly well-suited to modelling ultra-wideband GPR antennas as a broad range of frequencies can be modelled with a single simulation. We present comparisons using experimental and simulated data from a Geophysical Survey Systems 1.5 GHz antenna and a MALÅ Geoscience 1.2 GHz antenna. The antennas were investigated in free space and over a lossy dielectric environment with a target. For the simulations we used a commercial solver -Computer Simulation Technology Microwave Studio (CST) -and a free open-source FDTD solver -gprMax. For each test scenario, phase and amplitude information from the antenna responses were compared. Generally, we found very good agreement between the experimental data and the two simulations.

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Section: A Gprmaxmentioning

confidence: 99%

An evaluation of Finite-Difference and Finite-Integration Time-Domain modelling tools for Ground Penetrating Radar antennas

Warren

Pajewski

Ventura

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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“…Therefore, in the case of construction, we are required to examine without destroying the target objects buried in the soil. Then, the ground penetrating radar is known as technology which can investigate the geometry in underground structure [1,2,3,4,5]. However, though it is not treated the dispersion of underground medium, many numerical results are analyzed the inverse scattering problem by finite difference time domain (FDTD) method [4,5].…”

Section: Introductionmentioning

confidence: 99%

Analysis of pulse responses from conducting strips with dispersion medium sandwiched air layer

Ozaki

Yamasaki

2018

IEICE Electron. Express

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In this paper, we analyzed the pulse response from conducting strips with dispersion medium sandwiched air layer by using a combination of fast inversion of Laplace transform (FILT) method and point matching method (PMM), and investigated from pulse response the influence of periodically conducting strips and depth of air layer. From numerical results, we clarified the effect of the air layer, and characteristics of both air layer and periodically conducting strips are showed by differential waveform.

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“…Many efficient GPR antenna models are based on the Finite Difference Time Domain (FDTD) simulations, e.g. [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Stochastic post-processing of the deterministic boundary element modelling of the transient electric field from GPR dipole antenna propagating through lower half-space

Poljak¹,

Šesnić²,

Lalléchère³

et al. 2017

Int. J. CMEM

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The paper deals with time domain-deterministic stochastic assessment of a transient electric field generated by a ground penetrating radar (GPR) dipole antenna and transmitted into a lower half-space. The deterministic time domain formulation is based on the space-time Hallen integral equation for half-space problems. The Hallen equation is solved via the Galerkin-Bubnov variant of the Indirect Boundary Element Method (GB-IBEM) and the space-time current distribution along the dipole antenna is obtained, thus providing the field calculation. The field transmitted into the lower medium is obtained by solving the corresponding field integrals.As GPR systems are subjected to a rather complex environment, some input parameters, for example the antenna height over ground or earth properties, are partly or entirely unknown and, therefore, a simple stochastic collocation (SC) method is used to properly access relevant statistics about GPR time responses. The SC approach also aids in the assessment of corresponding confidence intervals from the set of obtained numerical results. The expansion of statistical output in terms of mean and variance over a polynomial basis, via the SC method, is shown to be a robust and efficient approach providing a satisfactory convergence rate.

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Calibration of FDTD Simulation of GPR Signal for Asphalt Pavement Compaction Monitoring

Cited by 63 publications

References 29 publications

An evaluation of Finite-Difference and Finite-Integration Time-Domain modelling tools for Ground Penetrating Radar antennas

An evaluation of Finite-Difference and Finite-Integration Time-Domain modelling tools for Ground Penetrating Radar antennas

Analysis of pulse responses from conducting strips with dispersion medium sandwiched air layer

Stochastic post-processing of the deterministic boundary element modelling of the transient electric field from GPR dipole antenna propagating through lower half-space

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