Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements

Tree roots detection is a popular application of the Ground-penetrating radar (GPR). Normally, the ground surface above the tree roots is assumed to be flat, and standard processing methods based on hyperbolic fitting are applied to the hyperbolae reflection patterns of tree roots for detection p...

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Main Authors: Luo, Wenhao, Lee, Yee Hui, Ow, Lai Fern, Yusof, Mohamed Lokman Mohd, Yucel, Abdulkadir C.
Other Authors: School of Electrical and Electronic Engineering
Format: Article
Language:English
Published: 2022
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Online Access:https://hdl.handle.net/10356/163778
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1637782022-12-16T06:16:04Z Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements Luo, Wenhao Lee, Yee Hui Ow, Lai Fern Yusof, Mohamed Lokman Mohd Yucel, Abdulkadir C. School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Electromagnetic Waves Fitting Model Tree roots detection is a popular application of the Ground-penetrating radar (GPR). Normally, the ground surface above the tree roots is assumed to be flat, and standard processing methods based on hyperbolic fitting are applied to the hyperbolae reflection patterns of tree roots for detection purposes. When the surface of the land is undulating (not flat), these typical hyperbolic fitting methods becomes inaccurate. This is because, the reflection patterns change with the uneven ground surfaces. When the soil surface is not flat, it is inaccurate to use the peak point of an asymmetric reflection pattern to identify the depth and horizontal position of the underground target. The reflection patterns of the complex shapes due to extreme surface variations results in analysis difficulties. Furthermore, when multiple objects are buried under an undulating ground, it is hard to judge their relative positions based on a B-scan that assumes a flat ground. In this paper, a roots fitting method based on electromagnetic waves (EM) travel time analysis is proposed to take into consideration the realistic undulating ground surface. A wheel-based (WB) GPR and an antenna-height-fixed (AHF) GPR System are presented, and their corresponding fitting models are proposed. The effectiveness of the proposed method is demonstrated and validated through numerical examples and field experiments. Ministry of National Development (MND) National Parks Board This work was supported by the Ministry of National Development Research Fund, National Parks Board, Singapore. 2022-12-16T06:16:03Z 2022-12-16T06:16:03Z 2022 Journal Article Luo, W., Lee, Y. H., Ow, L. F., Yusof, M. L. M. & Yucel, A. C. (2022). Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements. IEEE Transactions On Instrumentation and Measurement, 71, 5502011-. https://dx.doi.org/10.1109/TIM.2022.3181240 0018-9456 https://hdl.handle.net/10356/163778 10.1109/TIM.2022.3181240 2-s2.0-85133617688 71 5502011 en IEEE Transactions on Instrumentation and Measurement © 2022 IEEE. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Electrical and electronic engineering
Electromagnetic Waves
Fitting Model
spellingShingle Engineering::Electrical and electronic engineering
Electromagnetic Waves
Fitting Model
Luo, Wenhao
Lee, Yee Hui
Ow, Lai Fern
Yusof, Mohamed Lokman Mohd
Yucel, Abdulkadir C.
Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements
description Tree roots detection is a popular application of the Ground-penetrating radar (GPR). Normally, the ground surface above the tree roots is assumed to be flat, and standard processing methods based on hyperbolic fitting are applied to the hyperbolae reflection patterns of tree roots for detection purposes. When the surface of the land is undulating (not flat), these typical hyperbolic fitting methods becomes inaccurate. This is because, the reflection patterns change with the uneven ground surfaces. When the soil surface is not flat, it is inaccurate to use the peak point of an asymmetric reflection pattern to identify the depth and horizontal position of the underground target. The reflection patterns of the complex shapes due to extreme surface variations results in analysis difficulties. Furthermore, when multiple objects are buried under an undulating ground, it is hard to judge their relative positions based on a B-scan that assumes a flat ground. In this paper, a roots fitting method based on electromagnetic waves (EM) travel time analysis is proposed to take into consideration the realistic undulating ground surface. A wheel-based (WB) GPR and an antenna-height-fixed (AHF) GPR System are presented, and their corresponding fitting models are proposed. The effectiveness of the proposed method is demonstrated and validated through numerical examples and field experiments.
author2 School of Electrical and Electronic Engineering
author_facet School of Electrical and Electronic Engineering
Luo, Wenhao
Lee, Yee Hui
Ow, Lai Fern
Yusof, Mohamed Lokman Mohd
Yucel, Abdulkadir C.
format Article
author Luo, Wenhao
Lee, Yee Hui
Ow, Lai Fern
Yusof, Mohamed Lokman Mohd
Yucel, Abdulkadir C.
author_sort Luo, Wenhao
title Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements
title_short Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements
title_full Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements
title_fullStr Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements
title_full_unstemmed Accurate tree roots positioning and sizing over undulated ground surfaces by common offset GPR measurements
title_sort accurate tree roots positioning and sizing over undulated ground surfaces by common offset gpr measurements
publishDate 2022
url https://hdl.handle.net/10356/163778
_version_ 1753801087617335296