Li, Y., Wilson, J. and Tian, G.Y. (2007) Experiment and simulation study of 3D magnetic field sensing for magnetic flux leakage defect characterisation. NDT & E International, 40 (2). pp. 179-184. ISSN 0963-8695Metadata only available from this repository.
Magnetic flux leakage (MFL) testing is widely used to detect and characterise defects in pipelines, rail tracks and other structures. The measurement of the two field components perpendicular to the test surface and parallel to the applied field in MFL systems is well established. However, it is rarely effective when the shapes of the specimens and defects with respect to the applied field are arbitrary. In order to overcome the pitfalls of traditional MFL measurement, measurement of the three-dimensional (3D) magnetic field is proposed. The study is undertaken using extensive finite element analysis (FEA) focussing on the 3D distribution of magnetic fields for defect characterisation and employing a high sensitivity 3-axis magnetic field sensor in experimental study. Several MFL tests were undertaken on steel samples, including a section of rail track. The experimental and FEA test results show that data from not only the x- and z-axes but also y-axis can give comprehensive positional information about defects in terms of shape and orientation, being especially advantageous where the defect is aligned close to parallel to the applied field. The work concludes that 3D magnetic field sensing could be used to improve the defect characterisation capabilities of existing MFL systems, especially where defects have irregular geometries.
|Additional Information:||In proceedings of the 12th Chinese Automation and Computing Society Conference, Loughborough, 2006, 38-42|
|Subjects:||T Technology > TF Railroad engineering and operation|
T Technology > TA Engineering (General). Civil engineering (General)
|Schools:||School of Computing and Engineering|
1] R. Pohl, A. Erhard, H.J. Montag, H.M. Thomas and H. Wüstenberg, NDT techniques for railroad wheel and gauge corner inspection, NDT & E Int 37 (2004) (2), pp. 89–94. SummaryPlus | Full Text + Links | PDF (570 K) | View Record in Scopus | Cited By in Scopus (16)
 Drury JC, Marino A. A comparison of the magnetic flux leakage and ultrasonic methods in the detection and measurement of corrosion pitting in ferrous plate and pipe. In: 15th world conference on nondestructive testing, 2000.
 Bubenik TA, Nestleroth JB, Davis RJ, Leis BN, Francini RB, Udpa S, et al. In-line inspection technologies for mechanical damage and SCC in pipelines—final report, US Department of Transportation, Office of Pipeline Safety, June 2000.
 A. Sophian, G.Y. Tian and S. Zairi, Pulsed magnetic flux leakage probe for crack detection and characterisation, Sensor Actuat A-Phys 125 (2006) (2), pp. 186–191. SummaryPlus | Full Text + Links | PDF (499 K) | View Record in Scopus | Cited By in Scopus (7)
 M. Afzal and S. Udpa, Advanced signal processing of magnetic flux leakage data obtained from seamless gas pipeline, NDT & E Int 35 (2002) (7), pp. 449–457. SummaryPlus | Full Text + Links | PDF (428 K) | View Record in Scopus | Cited By in Scopus (15)
 V. Babbar and L. Clapham, Residual magnetic flux leakage: a possible tool for studying pipeline defects, J Nondestr Eval 22 (2003) (4).
 Kasai1 N, Mizoguchi T, Sekine K. The MFL technique for surface flaws using residual magnetisation method with the MI (Magneto-impedance) sensor. In: 16th WCNDT, 2004.
 Dubov. Principal features of metal magnetic memory method and inspection tools as compared to known magnetic NDT methods. In: 16th WCNDT, 2004.
 Y. Li, G.Y. Tian and S. Ward, Numerical simulations on electromagnetic NDT at high speed, Insight 48 (2006) (2), pp. 103–108. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (2)
 Li Y, Tian GY, Ward S. Numerical simulation on magnetic flux leakage evaluation at high speed. In: Proceedings of the 44th annual British conference on NDT, 2005. p. 239–48.
 Nestleroth JB, Bubenik TA. Battelle, magnetic flux leakage (MFL) technology for natural gas pipeline inspection. The Gas Research Institute, February 1999. http://www.battelle.org/pipetechnology/MFL/MFL98Main.html.
 J. Wilson and G.Y. Tian, 3D magnetic field sensing for magnetic flux leakage defect characterisation, Insight 48 (2006) (6), pp. 357–359. Full Text via CrossRef | View Record in Scopus | Cited By in Scopus (2)
 Wilson J, Tian GY, Barrans S. Residual magnetic field sensing for stress measurement. In: Proceedings of ECNDT annual conference, Germany, September 2006.
 Tian GY, Wilson J, Keprt J. Magnetic-acoustic emission for stress and material characterization. In: Proceedings of ENDE 2006, Japan, June 2006.
 COMSOL Corporation. FEMLAB V3.1 manual, 2004. http://www.femlab.com.
|Depositing User:||Briony Heyhoe|
|Date Deposited:||28 Mar 2008 10:46|
|Last Modified:||22 Oct 2008 14:09|
Repository Staff Only: item control page