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Volume 6
Research & Reviews: Journal of Material Sciences
ISSN: 2321-6212
Magnetic Materials 2018
October 22-23, 2018
October 22-23, 2018 | Rome, Italy
3
rd
International Conference on
Magnetism and Magnetic Materials
Res. Rev. J Mat. Sci. 2018, Volume 6
DOI: 10.4172/2321-6212-C6-030
Detection of small size defect in the insulated pipe using pulsed eddy current
D G Park
and
K H Kim
Korea Atomic Energy Research Institute, South Korea
T
he pulsed eddy current (PEC) system enables to detect the wall thinning and defects without removing the insulation,
but the resolution is poor and data analysis is not easy. In this study we developed PEC system to detect wall thinning
of Ferro magnetic steel pipes, which is capable of decimating the thickness change of pipe line through 95 mm fiber glass
thermal insulator and 0.4 mm Aluminum (Al) cladding. Peak amplitude and time to peak of the PEC signals obtained from
various thickness regions of the test sample were analyzed in time domain. Results show a very good change corresponding to
the sample thickness. In addition to time domain analysis, wavelet based signal processing technique was applied, in specific
wavelet packet analysis based algorithm that utilizes the encoding technique was developed in MATLAB platform. Results
were visualized and well accords with the time domain analysis.
dgpark@kaeri.re.kr