Research on CFRP Small-Gap Defect Detection by Joint Scanning Laser Thermography Based on Restored Pseudo Heat Flux

Hongjin Wang; Haolin Chen; Yunze He; Pengpeng Chen; Zihao Gong; Mengjie Song; Yaonan Wang; Benjamin Giron-Palomares

doi:10.1109/TIM.2025.3551026

Research on CFRP Small-Gap Defect Detection by Joint Scanning Laser Thermography Based on Restored Pseudo Heat Flux

Hongjin Wang, Haolin Chen, Yunze He^*, Pengpeng Chen^*, Zihao Gong, Mengjie Song, Yaonan Wang, Benjamin Giron-Palomares

^*Corresponding author for this work

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Infrared thermography, as a contactless and nondestructive inspection for carbon fiber reinforced composites, has shown limited efficiency to separate closely adjacent defective areas under irreversible thermal diffusion due to limited camera resolution. Based on restored pseudo heat flux (RPHF) theory, this research proposed a new data reconstruction method for joint laser scanning thermography which is inspired by rheology. The efficiency of the proposed novel method in separating adjacent defects was investigated by comparison with those efficiencies of more traditional methods. Signal-to-noise ratio, contrast, and defect separation data were used to evaluate the performance of the algorithm. The proposed method exhibited stable separation of adjacent defects within a 2-pixel interval for shallow buried defects.

Original language	English
Journal	IEEE Transactions on Instrumentation and Measurement
DOIs	https://doi.org/10.1109/TIM.2025.3551026
Publication status	Accepted/In press - 2025

Keywords

joint scanning thermography
micro-gap defects
MRPHF
restored pseudo heat flux

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10.1109/TIM.2025.3551026

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title = "Research on CFRP Small-Gap Defect Detection by Joint Scanning Laser Thermography Based on Restored Pseudo Heat Flux",

abstract = "Infrared thermography, as a contactless and nondestructive inspection for carbon fiber reinforced composites, has shown limited efficiency to separate closely adjacent defective areas under irreversible thermal diffusion due to limited camera resolution. Based on restored pseudo heat flux (RPHF) theory, this research proposed a new data reconstruction method for joint laser scanning thermography which is inspired by rheology. The efficiency of the proposed novel method in separating adjacent defects was investigated by comparison with those efficiencies of more traditional methods. Signal-to-noise ratio, contrast, and defect separation data were used to evaluate the performance of the algorithm. The proposed method exhibited stable separation of adjacent defects within a 2-pixel interval for shallow buried defects.",

keywords = "joint scanning thermography, micro-gap defects, MRPHF, restored pseudo heat flux",

author = "Hongjin Wang and Haolin Chen and Yunze He and Pengpeng Chen and Zihao Gong and Mengjie Song and Yaonan Wang and Benjamin Giron-Palomares",

note = "Publisher Copyright: {\textcopyright} 1963-2012 IEEE.",

year = "2025",

doi = "10.1109/TIM.2025.3551026",

language = "English",

journal = "IEEE Transactions on Instrumentation and Measurement",

issn = "0018-9456",

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T1 - Research on CFRP Small-Gap Defect Detection by Joint Scanning Laser Thermography Based on Restored Pseudo Heat Flux

AU - Wang, Hongjin

AU - Chen, Haolin

AU - He, Yunze

AU - Chen, Pengpeng

AU - Gong, Zihao

AU - Song, Mengjie

AU - Wang, Yaonan

AU - Giron-Palomares, Benjamin

PY - 2025

Y1 - 2025

N2 - Infrared thermography, as a contactless and nondestructive inspection for carbon fiber reinforced composites, has shown limited efficiency to separate closely adjacent defective areas under irreversible thermal diffusion due to limited camera resolution. Based on restored pseudo heat flux (RPHF) theory, this research proposed a new data reconstruction method for joint laser scanning thermography which is inspired by rheology. The efficiency of the proposed novel method in separating adjacent defects was investigated by comparison with those efficiencies of more traditional methods. Signal-to-noise ratio, contrast, and defect separation data were used to evaluate the performance of the algorithm. The proposed method exhibited stable separation of adjacent defects within a 2-pixel interval for shallow buried defects.

AB - Infrared thermography, as a contactless and nondestructive inspection for carbon fiber reinforced composites, has shown limited efficiency to separate closely adjacent defective areas under irreversible thermal diffusion due to limited camera resolution. Based on restored pseudo heat flux (RPHF) theory, this research proposed a new data reconstruction method for joint laser scanning thermography which is inspired by rheology. The efficiency of the proposed novel method in separating adjacent defects was investigated by comparison with those efficiencies of more traditional methods. Signal-to-noise ratio, contrast, and defect separation data were used to evaluate the performance of the algorithm. The proposed method exhibited stable separation of adjacent defects within a 2-pixel interval for shallow buried defects.

KW - joint scanning thermography

KW - micro-gap defects

KW - MRPHF

KW - restored pseudo heat flux

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U2 - 10.1109/TIM.2025.3551026

DO - 10.1109/TIM.2025.3551026

M3 - Article

AN - SCOPUS:105000290489

SN - 0018-9456

JO - IEEE Transactions on Instrumentation and Measurement

JF - IEEE Transactions on Instrumentation and Measurement

ER -

Research on CFRP Small-Gap Defect Detection by Joint Scanning Laser Thermography Based on Restored Pseudo Heat Flux

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Keywords

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