Quantitative imaging for civil engineering by joint full waveform inversion of surface-based GPR and shallow seismic reflection data

Feng, Xuan; Ren, Qisen; Liu, Cai

doi:10.1016/j.conbuildmat.2017.07.033

Cited by 16 publications

(3 citation statements)

References 38 publications

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“…En muchas ocasiones, y por diversas razones, se requiere detectar lo que hay bajo una superficie, para lo cual se puede hacer uso de un Radar de Penetración Terrestre o GPR (Ground Penetrating Radar, por sus siglas en inglés). Diversas investigaciones han permitido que el GPR sea usado en aplicaciones como el análisis estructural de obras civiles, en tareas como el mapeo del deterioro de la infraestructura de un metro [1] o la detección de cavidades o túneles [2], [3]; en arqueología, por ejemplo, se ha utilizado en la caracterización de ruinas romanas [4]; en geología, para la determinación de características de la tierra [5]; también, para la búsqueda y rescate en catástrofes [6], y en la búsqueda de minas antipersonales [7].…”

Section: Introductionunclassified

Estudio de la capacidad de detección de un sistema gpr usando wavelets en un terreno arcilloso seco

Ledezma Ríos

2023

Rev. Fac. Cienc. Básicas

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Las ondas electromagnéticas pueden darnos información de ciertas situaciones, pero la pérdida de energía debido al contacto o penetración en superficies pueden variar los datos de información al verse influenciadas por la permitividad relativa del medio y la constante dieléctrica de algunos materiales, por lo que para la detección se hace necesario investigar otro tipo de señales que no generen pérdida de información, cuando se utilizan para detección en terrenos con características particulares. En esta investigación se analiza la capacidad de detección de un sistema GPR cuando hace uso de señales tipo wavelet, las cuales son más conocidas como una herramienta de análisis de señales, dando como resultado que las señales del tipo wavelets pueden identificar objetos enterrados al ser transmitidas y recibidas bajo el análisis de amplitud, la correlación y la profundidad de penetración de la señal.

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Section: Introductionunclassified

Estudio de la capacidad de detección de un sistema gpr usando wavelets en un terreno arcilloso seco

Ledezma Ríos

2023

Rev. Fac. Cienc. Básicas

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“…Ground Penetrating Radar) can be used. Various investigations have allowed the GPR to be used in applications such as the structural analysis of civil works in tasks such as mapping the deterioration of a subway infrastructure 1 or the detection of cavities or tunnels; 2,3 In archaeology, for example, it has been used in the characterization of Roman ruins; 4 in geology for the determination of land characteristics; 5 for search and rescue in catastrophes 6 and in the search for antipersonnel mines. 7 To carry out this work, the GPR is supported by the principle of propagation of electromagnetic waves through the phenomena of refraction, reflection and diffraction of these in a discontinuous medium.…”

Section: Introductionmentioning

confidence: 99%

Study of the detection capacity of a GPR system using wavelet waves in a dry clay soil

Ledezma Rios

2023

OAJS

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Electromagnetic waves can give us information about certain situations, but the loss of energy due to contact or penetration into surfaces can vary the information data when it is influenced by the relative permittivity of the medium and the dielectric constant of some materials, so for the detection, it is necessary to investigate other types of signals that do not generate loss of information, when they are used for detection in terrains with particular characteristics. In this research, the detection capacity of a GPR system is analyzed when it makes use of wavelet-type signals, which are better known as a signal analysis tool, resulting in wavelet-type signals that can identify buried objects when transmitted. and received under the amplitude analysis, the correlation and the penetration depth of the signal.

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“…The uncertainty of electrical parameters directly affects the GPR imaging effectiveness of mixed media. Therefore, developing models to accurately simulate the electromagnetic response characteristics and dielectric properties of mixed media in advance is of great significance to the imaging, processing and interpretation of actual GPR signals (Soldovieri et al ., 2011; Zarei et al ., 2016; Feng et al ., 2017; Farmani, 2019). Commonly used methods for modelling GPR include finite‐element time‐domain (FETD) and finite‐difference time‐domain (FDTD) methods (Jin‐Fa et al ., 1997; Hagness et al ., 2005).…”

Section: Introductionmentioning

confidence: 99%

Fine grid model for the dielectric characteristics of ground‐penetrating radar in mixed media

Ling

Liu

et al. 2022

Geophysical Prospecting

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The Fisher–Yates random shuffling algorithm combined with the finite‐difference time‐domain method is proposed to construct a fine grid model for the forward simulation of ground‐penetrating radar in mixed media. First, the finite‐difference time‐domain method was used to divide the coarse grid model into several fine grid models by conforming to the boundary conditions of different media, and the corresponding dielectric parameters were assigned to Yee cells in each fine grid model. Then, the Fisher–Yates random shuffling algorithm was used to randomly scramble all Yee cells with equal probability, and the array of scrambled Yee cells was recombined into a coarse grid model. Finally, the geoelectric model of mixed media was generated with the finite‐difference time‐domain method, and a ground‐penetrating radar image excited by electromagnetic wave pulses was obtained. To explore the characteristic signals and dielectric properties of the ground‐penetrating radar electromagnetic response in mixed media, image entropy theory was used to describe the ground‐penetrating radar image, and waveform analysis and wavelet transform mode maximum methods were used to analyse the single‐channel ground‐penetrating radar signal of the mixed media. The results showed that the Fisher–Yates random shuffling–finite‐difference time‐domain method can be used to construct a valid and stable fine grid model for simulating ground‐penetrating radar in mixed media. The model effectively inhibits electromagnetic attenuation and energy dissipation, and the wavelet transform mode maximum method explains the relative dielectric permittivity distribution of the mixed media. The findings of this study can be used as a theoretical basis for correcting radar parameters and interpreting images when ground‐penetrating radar is applied to mixed media.

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Quantitative imaging for civil engineering by joint full waveform inversion of surface-based GPR and shallow seismic reflection data

Cited by 16 publications

References 38 publications

Estudio de la capacidad de detección de un sistema gpr usando wavelets en un terreno arcilloso seco

Estudio de la capacidad de detección de un sistema gpr usando wavelets en un terreno arcilloso seco

Study of the detection capacity of a GPR system using wavelet waves in a dry clay soil

Fine grid model for the dielectric characteristics of ground‐penetrating radar in mixed media

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