Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar
Ground-penetrating radar (GPR) has been an effective technology for locating metal bars in civil engineering structures. However, the accurate sizing of subsurface metal bars of small diameters remains a challenging problem for the existing reflection pattern-based method due to the limited resoluti...
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sg-ntu-dr.10356-1699302023-08-15T05:14:50Z Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar Sun, Hai-Han Cheng, Weixia Fan, Zheng School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Cylindrical Metal Bar Diameter Estimation Ground-penetrating radar (GPR) has been an effective technology for locating metal bars in civil engineering structures. However, the accurate sizing of subsurface metal bars of small diameters remains a challenging problem for the existing reflection pattern-based method due to the limited resolution of GPR. To address the issue, we propose a reflection power-based method by exploring the relationship between the bar diameter and the maximum power of the bar reflected signal obtained by a wideband dual-polarized GPR, which circumvents the resolution limit of the existing pattern-based method. In the proposed method, the theoretical relationship between the bar diameter and the power ratio of the bar reflected signals acquired by perpendicular and parallel polarized antennas is established via the inherent scattering width of the metal bar and the wideband spectrum of the bar reflected signal. Based on the theoretical relationship, the bar diameter can be estimated using the obtained power ratio in a GPR survey. Simulations and experiments have been conducted with different GPR frequency spectra, subsurface mediums, and metal bars of various diameters and depths to demonstrate the efficacy of the method. Experimental results show that the method achieves high sizing accuracy with errors of less than 10% in different scenarios. With its simple operation and high accuracy, the method can be implemented in real-time in situ examination of subsurface metal bars. Agency for Science, Technology and Research (A*STAR) This work was supported by the A*STAR Science and Engineering Research Council under Project A19F1a0104 and Project A20F9a0045. 2023-08-15T05:14:50Z 2023-08-15T05:14:50Z 2023 Journal Article Sun, H., Cheng, W. & Fan, Z. (2023). Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar. IEEE Transactions On Instrumentation and Measurement, 72, 8000714-. https://dx.doi.org/10.1109/TIM.2023.3235447 0018-9456 https://hdl.handle.net/10356/169930 10.1109/TIM.2023.3235447 2-s2.0-85147211180 72 8000714 en A19F1a0104 A20F9a0045 IEEE Transactions on Instrumentation and Measurement © 2023 IEEE. All rights reserved. |
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Engineering::Mechanical engineering Cylindrical Metal Bar Diameter Estimation Sun, Hai-Han Cheng, Weixia Fan, Zheng Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar |
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Ground-penetrating radar (GPR) has been an effective technology for locating metal bars in civil engineering structures. However, the accurate sizing of subsurface metal bars of small diameters remains a challenging problem for the existing reflection pattern-based method due to the limited resolution of GPR. To address the issue, we propose a reflection power-based method by exploring the relationship between the bar diameter and the maximum power of the bar reflected signal obtained by a wideband dual-polarized GPR, which circumvents the resolution limit of the existing pattern-based method. In the proposed method, the theoretical relationship between the bar diameter and the power ratio of the bar reflected signals acquired by perpendicular and parallel polarized antennas is established via the inherent scattering width of the metal bar and the wideband spectrum of the bar reflected signal. Based on the theoretical relationship, the bar diameter can be estimated using the obtained power ratio in a GPR survey. Simulations and experiments have been conducted with different GPR frequency spectra, subsurface mediums, and metal bars of various diameters and depths to demonstrate the efficacy of the method. Experimental results show that the method achieves high sizing accuracy with errors of less than 10% in different scenarios. With its simple operation and high accuracy, the method can be implemented in real-time in situ examination of subsurface metal bars. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Sun, Hai-Han Cheng, Weixia Fan, Zheng |
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Article |
author |
Sun, Hai-Han Cheng, Weixia Fan, Zheng |
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Sun, Hai-Han |
title |
Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar |
title_short |
Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar |
title_full |
Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar |
title_fullStr |
Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar |
title_full_unstemmed |
Diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar |
title_sort |
diameter estimation of cylindrical metal bar using wideband dual-polarized ground-penetrating radar |
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2023 |
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https://hdl.handle.net/10356/169930 |
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1779156799834816512 |