Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion

Temperature distribution is an important factor influencing the formation of defects in engineering components operating at high temperatures. A non-contact thermographic method based on the laser-ultrasonic technique and the wave-equation-based inversion (WEBI) algorithms is proposed. Three algorit...

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Main Authors: Hu, Lei, Zuo, Peng, Sun, Zeqing, Fan, Zheng
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2023
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Online Access:https://hdl.handle.net/10356/170055
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1700552023-08-22T08:32:27Z Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion Hu, Lei Zuo, Peng Sun, Zeqing Fan, Zheng School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Non-contact Subsurface Thermography Temperature distribution is an important factor influencing the formation of defects in engineering components operating at high temperatures. A non-contact thermographic method based on the laser-ultrasonic technique and the wave-equation-based inversion (WEBI) algorithms is proposed. Three algorithms, which are full waveform inversion (FWI), traveltime waveform inversion (TWI), and double-difference traveltime waveform inversion (DDTWI), are used to reconstruct the temperature maps of the subsurface region of high-temperature metals. The performances of the algorithms are investigated both numerically and experimentally. Among these algorithms, FWI shows the highest accuracy and the largest reconstruction depth but is also susceptible to noise. TWI and DDTWI show similar performances in terms of the reconstruction depth and accuracy, while TWI has better resistance to noise. Ministry of Education (MOE) The authors would like to acknowledge funding support from MOE AcRF Tier 2 MOE2019-T2-2-068. 2023-08-22T08:32:27Z 2023-08-22T08:32:27Z 2023 Journal Article Hu, L., Zuo, P., Sun, Z. & Fan, Z. (2023). Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion. Mechanical Systems and Signal Processing, 197, 110378-. https://dx.doi.org/10.1016/j.ymssp.2023.110378 0888-3270 https://hdl.handle.net/10356/170055 10.1016/j.ymssp.2023.110378 2-s2.0-85154540416 197 110378 en MOE2019-T2-2-068 Mechanical Systems and Signal Processing © 2023 Elsevier Ltd. 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::Mechanical engineering
Non-contact
Subsurface Thermography
spellingShingle Engineering::Mechanical engineering
Non-contact
Subsurface Thermography
Hu, Lei
Zuo, Peng
Sun, Zeqing
Fan, Zheng
Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion
description Temperature distribution is an important factor influencing the formation of defects in engineering components operating at high temperatures. A non-contact thermographic method based on the laser-ultrasonic technique and the wave-equation-based inversion (WEBI) algorithms is proposed. Three algorithms, which are full waveform inversion (FWI), traveltime waveform inversion (TWI), and double-difference traveltime waveform inversion (DDTWI), are used to reconstruct the temperature maps of the subsurface region of high-temperature metals. The performances of the algorithms are investigated both numerically and experimentally. Among these algorithms, FWI shows the highest accuracy and the largest reconstruction depth but is also susceptible to noise. TWI and DDTWI show similar performances in terms of the reconstruction depth and accuracy, while TWI has better resistance to noise.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Hu, Lei
Zuo, Peng
Sun, Zeqing
Fan, Zheng
format Article
author Hu, Lei
Zuo, Peng
Sun, Zeqing
Fan, Zheng
author_sort Hu, Lei
title Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion
title_short Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion
title_full Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion
title_fullStr Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion
title_full_unstemmed Non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion
title_sort non-contact subsurface thermography for high-temperature metallic structures using laser ultrasound and wave-equation-based inversion
publishDate 2023
url https://hdl.handle.net/10356/170055
_version_ 1779156656491331584