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A measuring system for magnetostriction of silicon steel sheet using optical methods and a single sheet tester has been developed to establish a standard test method for IEC and JIS. Various factors affecting measurement accuracy and reproducibility of the developed system are examined. Two optical instruments, such as a laser Doppler vibrometer and a heterodyne displacement meter, are compared. 3-D characteristics of magnetostriction under ac excitation in the rolling direction are measured up to 2.0 T
magnetic variables measurement
measurement by laser beam
Published with permission from the copyright holder. this is the institute's copy, as published in MMM-Intermag Conference, 1998. Abstracts., The 7th Joint, 6-9 Jan. 1998, Pages 220-220.
Copyright © 1998 IEEE. All rights reserved.