Abstract
In this paper, Electro-Magnetic Acoustic Transducers(EMATs) has been applied to detection of unsound part of magnetic property on grain-oriented electrical steel sheet by measuring time of flight of Lamb(So) wave. Combination techniques of cross correlation method and zero cross method has been developed in order to measure time Of flight measurement in high accuracy. The experimental result 3howed that time of flight showed a good relationship to magnetic property, and the unsound parts were successfully detected.
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