Characterization of NDT signals: Reconstruction from wavelet transform maximum curvature representation

Mukhopadhyay, Siddhartha; Tiwari, A.P.

doi:10.1016/j.sigpro.2009.06.014

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“…It can be divided into NPN type and PNP type. Both of them have high sensitivity, but because of the nonlinearity of the temperature coefficient and the output, few have been applied in fact [ 64 ]. Magnetic resistance.…”

Section: Measurement and Processingmentioning

confidence: 99%

Theory and Application of Magnetic Flux Leakage Pipeline Detection

Shi

Zhang

et al. 2015

Sensors

291

125

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Magnetic flux leakage (MFL) detection is one of the most popular methods of pipeline inspection. It is a nondestructive testing technique which uses magnetic sensitive sensors to detect the magnetic leakage field of defects on both the internal and external surfaces of pipelines. This paper introduces the main principles, measurement and processing of MFL data. As the key point of a quantitative analysis of MFL detection, the identification of the leakage magnetic signal is also discussed. In addition, the advantages and disadvantages of different identification methods are analyzed. Then the paper briefly introduces the expert systems used. At the end of this paper, future developments in pipeline MFL detection are predicted.

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Section: Measurement and Processingmentioning

confidence: 99%