Abstract
MFL (Magnetic flux leakage) signal is the key detection information for fault diagnosis and defect estimation of oil and gas pipeline. However, the incompleteness of MFL signal is a common phenomenon in the testing engineering due to the abnormal state of MFL sensors, overrange signals or detection noise, etc. Therefore, in this work, we propose a data recovery method for the incomplete MFL signal. Besides, a forward formula of MFL signal based on Sinc series expansion is also given for efficient calculation. Finally, an MFL testing experiment has been conducted and different missing gap degree data has been tested. The experiment results indicate that the proposed method can recovery the gap data well and the idea of Sinc function calculation can be further applied to the analysis and reconstruct of MFL signal of defect.
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