Pulsed Eddy Current Method: an Overview

Beissner, R. E.; Rose, James H.; Nakagawa, N.

doi:10.1007/978-1-4615-4791-4_59

Cited by 6 publications

(2 citation statements)

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“…LOI, was employed to characterize the hidden corrosion. Other features, such as peak value, zero-crossing time [1], or the features from the transform domain [19] may be considered It is observed that such a slice is not fixed with the presence of corrosion [12]. Therefore, the preselected LOI slice may not be the optimal one for the quantification process.…”

Section: Discussionmentioning

confidence: 99%

“…In contrast to the conventional ET technique, the pulsed eddy current technique employs a broadband pulse instead of a continuous wave as the excitation signal [1]. Therefore, the P-ET measurement is equivalent to multiple conventional eddy current measurements at different frequencies, where information from different depths is available.…”

Section: Nondestructive Inspections Of Aircraft Lap Jointsmentioning

confidence: 99%

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Combining multiple nondestructive inspection images with a generalized additive model

Liu

Ramuhalli

Safizadeh

et al. 2008

Meas. Sci. Technol.

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In this paper, multiple nondestructive inspection (NDI) images are combined with a generalized additive model to achieve a more precise and reliable assessment of hidden corrosion in aircraft lap joints. Two inspection techniques are considered in this study. One is the conventional multi-frequency eddy current testing technique and the other is the pulsed eddy current technique. To characterize the thickness loss or equivalently to achieve a quantitative measure of corrosion, multiple NDI images are fused to produce a thickness map that reflected the amount of corrosion damage. These results are further compared with corresponding digital x-ray thickness maps, which are obtained by mapping the remaining thickness after the specimen is dissembled and all the corrosion products are cleaned. Experimental results demonstrate that the proposed algorithms outperform the traditional calibration method aligned with a single testing approach.

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Section: Discussionmentioning

confidence: 99%

Section: Nondestructive Inspections Of Aircraft Lap Jointsmentioning

confidence: 99%