Equivalent MFL model of pipelines for 3-D defect reconstruction using simulated annealing inversion procedure

Article type: Research Article

Authors: Chen, Junjie^a | Huang, Songling^{a; *} | Zhao, Wei^a

Affiliations: [a] State Key Laboratory of Power System and Department of Electrical Engineering, Tsinghua University, Beijing, China

Correspondence: [*] Corresponding author: Songling Huang, State Key Laboratory of Power System and Department of Electrical Engineering, Tsinghua University, Beijing 100084, China. Tel.: +86 010 6277 2131; Fax: +86 010 6277 2131; E-mail: huangsling@tsinghua.edu.cn

Abstract: In this paper, we propose an equivalent forward model of magnetic flux leakage (MFL) inspection in pipelines to reduce the computation effort to predict MFL signals. Then an iterative simulated annealing inversion procedure is developed to reconstruct the three-dimensional (3-D) defect profile from MFL signals. Experiments results, based on both simulated and measured MFL signals, demonstrate that the proposed inversion procedure using the equivalent forward model has high performance in terms of execution speed and accuracy.

Keywords: Magnetic flux leakage, equivalent model, defect reconstruction, pipeline inspection, simulated annealing algorithm

DOI: 10.3233/JAE-140022

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 47, no. 2, pp. 551-561, 2015