Fast Magnetic Flux Leakage Signal Inversion for the Reconstruction of Arbitrary Defect Profiles in Steel Using Finite Elements

被引:77
作者
Priewald, Robin H. [1 ]
Magele, Christian [2 ]
Ledger, Paul D. [1 ]
Pearson, Neil R.
Mason, John S. D. [1 ]
机构
[1] Swansea Univ, Coll Engn, Swansea, W Glam, Wales
[2] Graz Univ Technol, Inst Fundamentals & Theory Elect Engn, A-8010 Graz, Austria
关键词
Arbitrary defect reconstruction; finite element method (FEM); inverse problem; magnetic flux leakage (MFL); non-destructive testing (NDT); steel corrosion sizing; REGULARIZATION; MODEL;
D O I
10.1109/TMAG.2012.2208119
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
This paper proposes a fast and effective method for reconstructing arbitrary defect profiles in steel plates from magnetic flux leakage (MFL) measurements widely used in nondestructive testing (NDT) of oil storage tanks and pipelines. The inverse reconstruction problem is formulated based on a nonlinear forward model using the finite element method (FEM) and is implemented in 2-D. A Gauss-Newton optimization is applied to reconstruct the defect geometry, using efficiently calculated Jacobian information directly derived from the FEM system matrix. The algorithm's effectiveness is tested on a simulated and complex-shaped reference defect under various conditions. For a realistic MFL sensor distance to the plate surface and noise level on the signals, the algorithm is capable of reconstructing the defect profile from the MFL signals using 49 surface degrees of freedom with high accuracy in less than 15 s on an Intel Core i7 2.6-GHz laptop. The presented technique exhibits high inversion speed while maintaining the high prediction accuracy of the MFL signals by using a full-scale and flexible nonlinear FEM model. Our technique also exhibits a good convergence behavior and is stable and robust. These properties, together with its easy extension to 3-D, make our technique an extremely promising and novel approach for the practical application of surface profile reconstruction for NDT.
引用
收藏
页码:506 / 516
页数:11
相关论文
共 29 条
[1]   A Space Mapping Methodology for Defect Characterization From Magnetic Flux Leakage Measurements [J].
Amineh, Reza K. ;
Koziel, Slawomir ;
Nikolova, Natalia K. ;
Bandler, John W. ;
Reilly, James P. .
IEEE TRANSACTIONS ON MAGNETICS, 2008, 44 (08) :2058-2065
[2]   Jacobian calculation for electrical impedance tomography based on the reciprocity principle [J].
Brandstätter, B .
IEEE TRANSACTIONS ON MAGNETICS, 2003, 39 (03) :1309-1312
[3]  
Cameron N. B., 2006, 481 UK HSE
[4]   Reconstruction of crack shapes from the MFLT signals by using a rapid forward solver and an optimization approach [J].
Chen, ZM ;
Preda, G ;
Mihalache, O ;
Miya, K .
IEEE TRANSACTIONS ON MAGNETICS, 2002, 38 (02) :1025-1028
[5]  
Clapham L., 2008, P 7 INT PIP C IPC 08, P1
[6]   Dipole Modeling of Magnetic Flux Leakage [J].
Dutta, Sushant M. ;
Ghorbel, Fathi H. ;
Stanley, Roderic K. .
IEEE TRANSACTIONS ON MAGNETICS, 2009, 45 (04) :1959-1965
[7]   THE MAGNETIC LEAKAGE FIELD OF SURFACE-BREAKING CRACKS [J].
EDWARDS, C ;
PALMER, SB .
JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1986, 19 (04) :657-673
[8]  
Engwirda D., 2009, MESH2D MESHGENERATOR
[9]   Improved FEM model for defect-shape construction from MFL signal by using genetic algorithm [J].
Hari, K. C. ;
Nabi, M. ;
Kulkarni, S. V. .
IET SCIENCE MEASUREMENT & TECHNOLOGY, 2007, 1 (04) :196-200
[10]   Finite element modelling of a circumferential magnetiser [J].
Ireland, RC ;
Torres, CR .
SENSORS AND ACTUATORS A-PHYSICAL, 2006, 129 (1-2) :197-202