Distance sensors utilizing large Barkhausen effect of amorphous wires.
- 1 January 1989
- journal article
- Published by The Magnetics Society of Japan in Journal of the Magnetics Society of Japan
- Vol. 13 (2) , 439-442
- https://doi.org/10.3379/jmsjmag.13.439
Abstract
New distance sensors are presented which utilize a large Barkhausen effect of amorphous magnetostrictive wires. Only one domain wall is propagated in the direction of the wire axis with a drive magnetic field H when the condition H*>H>H0 is satisfied throughout the wire length, where H* is the critical field of nucleation of a reverse domain, and H0 is the critical field of domain wall displacement. A distance sensor with a nolinearity of less than 0.7%FS throughout a 1000 mm distance is established using a cold-drawn and then heat-treated Fe77.5Si7.5B15 amorphous wire of 30μm diameter and 1400 mm length, in which the wall velocity vw=2Ms(H-H0)/β is controlled by increasing H*.Keywords
This publication has 3 references indexed in Scilit:
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