Title :
Analysis of the velocity-induced eddy current in MFL type NDT
Author :
Park, Gwan Soo ; Park, Sang Ho
Author_Institution :
Dept. of Electr. Eng., Pusan Nat. Univ., Busan, South Korea
fDate :
3/1/2004 12:00:00 AM
Abstract :
In magnetic flux leakage (MFL) type nondestructive testing (NDT), there could be velocity-induced eddy currents during the sensing, which might cause the distortion of the defect signals. In this paper, the distortions of the sensing signals are analyzed by using three-dimensional finite-element analysis with velocity-induced eddy currents, and then, the compensation scheme of the signal distortion is presented to obtain the pure defect signals. The presented method has been verified by experimental measurement.
Keywords :
eddy current testing; finite element analysis; magnetic fields; magnetic flux; pipelines; MFL type NDT; compensation scheme; defect signals; finite-element analysis; magnetic flux leakage; nondestructive testing; pipe in gas; sensing signals; signal distortion; velocity-induced eddy current; Distortion measurement; Eddy currents; Finite element methods; Magnetic analysis; Magnetic flux leakage; Magnetic sensors; Nondestructive testing; Pipelines; Saturation magnetization; Signal analysis;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2004.824717
