Features extraction and discussion in a novel frequency-band-selecting pulsed eddy current testing method for the detection of a certain depth range of defects

Xie, Shejuan; Zhang, Lei; Zhang, Ying; Wang, Xiaogang; Kong, Yu‐Ying; Ma, Qin; Chen, Zhenmao; Uchimoto, Tetsuya; Takagi, Toshiyuki

doi:10.1016/j.ndteint.2019.102211

Cited by 55 publications

(18 citation statements)

References 32 publications

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“…The electric conductivities in the longitudinal, transversal and cross-ply directions of the CFRP plate are set as 1110 S/m, 4.48 S/m and 0.036 S/m, respectively, which were obtained based on measurements. 15…”

Section: Upgrade Of the Forward Schemementioning

confidence: 99%

“…21 Thus, large reduction of computer resources to obtain ECT signal perturbation q f 1 n o can be realized by solving equation 16, as its number of unknowns is only related to the nodes of flaw region, which is much less than those of the whole analysis region. By taking the anisotropic conductivity in the calculation formulae in equation (7) to equation (15) for coefficient matrices, and with the similar fast simulation scheme using the unflawed potential database for ECT of the metallic material, the fast simulation of ECT signal perturbation due to defect in a CFRP plate can be properly realized. 15…”

Section: Fast Simulation Scheme For Ect Of Cfrpmentioning

confidence: 99%

“…By taking the anisotropic conductivity in the calculation formulae in equation (7) to equation (15) for coefficient matrices, and with the similar fast simulation scheme using the unflawed potential database for ECT of the metallic material, the fast simulation of ECT signal perturbation due to defect in a CFRP plate can be properly realized. 15…”

Section: Fast Simulation Scheme For Ect Of Cfrpmentioning

confidence: 99%

“…12–14 Up to now, however, the ECT technique for the NDT of defects in CFRP material still needs to be improved, especially for the quantitative defect evaluation. 15…”

Section: Introductionmentioning

confidence: 99%

“…[12][13][14] Up to now, however, the ECT technique for the NDT of defects in CFRP material still needs to be improved, especially for the quantitative defect evaluation. 15 As the first step to realize quantitative ECT of real defect in a practical CFRP plate, establishing a forward and inversion ECT numerical scheme for electric anisotropic material is important and essential. In view of such a research aim, limiting the defect of this study as a crack/slit is reasonable.…”

Section: Introductionmentioning

confidence: 99%

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Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing

Xie

et al. 2020

Journal of Composite Materials

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This article aims to study the quantitative eddy current testing of structures of carbon fiber reinforced polymer (CFRP) material; numerical schemes for forward and inverse analysis of eddy current testing signals are proposed and validated for eddy current testing of the CFRP material. At first, an efficient forward solver based on the database approach is updated to treat anisotropic eddy current problem for efficient simulation of the eddy current testing signals due to crack in CFRP material, and an inversion scheme based on the conjugate gradient method is developed using the updated fast forward solver for sizing defect in a CFRP plate. Second, a hybrid inverse analysis scheme is proposed and implemented to improve the sizing accuracy of crack in a CFRP plate using eddy current testing signals of high frequency. Third, eddy current testing signals due to artificial cracks in a CFRP plate are measured and adopted to reconstruct the profile of the cracks. A good agreement between the true and the reconstructed defect sizes demonstrated the validity of both the fast forward solver and the new inversion scheme for sizing defects in the CFRP plate from eddy current testing signals.

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Section: Upgrade Of the Forward Schemementioning

confidence: 99%

Section: Fast Simulation Scheme For Ect Of Cfrpmentioning

confidence: 99%

Section: Fast Simulation Scheme For Ect Of Cfrpmentioning

confidence: 99%

“…12–14 Up to now, however, the ECT technique for the NDT of defects in CFRP material still needs to be improved, especially for the quantitative defect evaluation. 15…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing

Xie

et al. 2020

Journal of Composite Materials

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Designing GMR Sensor Probe Using Transmitter Coil for Artificial Crack Identification on Brass and Mild Steel Calibration Block

Rahman,

Ali,

Rifai

et al. 2024

Lecture Notes in Electrical Engineering

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Novel Phase Reversal Feature for Inspection of Cracks Using Multi-frequency Alternating Current Field Measurement Technique

Yuan,

Li,

Zhao

et al. 2024

Recent Development of Alternating Current Field Measurement Combine With New Technology

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Aluminum and its alloys have been widely used in aerospace and other industrial fields. Aluminum and its alloy structures are prone to surface and subsurface cracks when they are used in harsh environments. In this paper, a novel phase reversal feature is found to classify and evaluate cracks using the multi-frequency alternating current field measurement (ACFM) technique. The theoretical model of the phase reversal feature is developed. The distorted electromagnetic field and response signals of surface and subsurface cracks are analyzed by the finite element method. The multi-frequency ACFM testing system is set up. The experiments are carried out to test surface and subsurface cracks. The results show that the response signals of the surface and subsurface cracks have distinct characteristic due to the phase reversal feature using the multi-frequency ACFM technique. The surface and subsurface cracks can be classified by the amplitude reversal phenomenon of the Bz signal caused by the novel phase reversal feature. The buried depth of the subsurface crack can be evaluated accurately by the reversal frequency component.

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Features extraction and discussion in a novel frequency-band-selecting pulsed eddy current testing method for the detection of a certain depth range of defects

Cited by 55 publications

References 32 publications

Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing

Reconstruction of cracks in a carbon fiber-reinforced polymer laminate plate from signals of eddy current testing

Designing GMR Sensor Probe Using Transmitter Coil for Artificial Crack Identification on Brass and Mild Steel Calibration Block

Novel Phase Reversal Feature for Inspection of Cracks Using Multi-frequency Alternating Current Field Measurement Technique

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