The Transactions of the Korean Institute of Electrical Engineers B (대한전기학회논문지:전기기기및에너지변환시스템부문B)

The Korean Institute of Electrical Engineers (대한전기학회)
권호 표지

Effects of the PIG Draft Velocity on the Defect Signals in MFL NDT System

자기 누설 비파괴 탐상 시스템에서 PIG의 주행속도가 검출신호에 미치는 영향

  • 박상호 (한국해양대학 전기전자공학부) ;
  • 박관수 (부산대학 전자전기통신공학부)
  • Published : 2003.10.01
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, dynamic characteristics of the magnetic flux leakage(MFL) type non-destructive testing(NDT) are analyzed. Effects of a sensor speed in MFL PIG system and remanent magnetization of the gas pipeline are analyzed by using 3 dimensional nonlinear finite element analysis including eddy current and hysteresis characteristics. Results show that the speed of the sensor reduces the magnitude of the sensing signals where as the hysteresis of the pipeline distorts the sensing signals.

Keywords

References

  1. Jim Cordell, C. Eng, M. I. Mech. E,F.Inst.Pet and Hershel Vanzant, 1999, 'In-line Inspection pigging', All About pigging, chapter 8, pp. 1-28
  2. H.Haines et al., 'Advanced MFL signal analysis aids pipe corrosion detection', Pipeline & Gas Industry, pp. 49-63, March 1999
  3. K.K.Tandon, 'MFL Tool Hardware for Pipeline Inspection', Materials Selection & Design, pp. 75-79, February 1997
  4. D. L.Atherton and M. G.Daly, 'Finite Element Calculation of Magnetic Leakage Detector Signals', NDT International, vol. 20, no. 4, pp. 235-238, August 1987 https://doi.org/10.1016/0308-9126(87)90247-1
  5. J. Bruce Nestleroth, Steven W. Rust, and David A. Burgoon, 'Determining Corrosion Defect Geometry from Magnetic Flux Leakage PIG Data', The NACE International Annual Conference and Exposition CORROSION 96, Paper No. 44, pp. 1-11, 1996
  6. S. Mandayam, L. Udpa, S. S. Udpa and W. Lord, 'Wavelet-based permeability compensation technique for characterizing magnetic flux leakage images' Data', NDT&E International, Vol. 30, No. 5, pp. 297-303, 1997 https://doi.org/10.1016/S0963-8695(96)00075-8
  7. Richard P. Lippmann, 'An Introduction to Computing with Neural Nets', IEEE ASSP MAGAZINE, pp. 4-22, April 1987
  8. G.S.Park, P.W.Chang and Y.K.Kim, 'Sensitive Detection of the Defect Signals in MFL Type NDT', Proceedings of the Ninths Biennial IEEE Conference on Electromagnetic Field Computation, pp 181, Milwaukee, U.S.A., June 4-7 2000
  9. G.S.Park, P.W.Chang and Y.W.Rho, 'Optimum Design of the Non-Destructive Testing System to Maximize the Magnetic Flux Leakages', Journal of Magnetics, Vol.6, No.1, pp.31-35, March 2001