ANALYSIS OF THE MAGNETIC FLUX LEAKAGE SIGNA0L DETECTED BY A PIPELINE INSPECTION GAUGE WITH THE HELP OF THE ONTINUOS WAVELET TRANSFORM

Leszek Piotrowski – Marek Chmielewski

   The paper discusses the new possible ways of magnetic flux leakage (MFL) signal analysis with the help of the wavelet analysis. It describes the advantages of such approach taking into account its potential in using standard wavelets for the flaw detection, as well as the possibility of adapting the custom designed wavelet function. The possibility of detection and quantita-tive evaluation of material defects is considered. In the paper, the abovementioned issues are dealt with on the basis of the re-sults of the measurements performed with the help of a prototype device that is intended to be a part of a presently designed high resolution pipeline inspection device (PIG).

Keywords: magnetic flux leakage, nondestructive testing, wavelet transform

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