Title :
Distance sensors utilizing large Barkhausen effect excited by wire current pulse train in twisted amorphous magnetostrictive wires
Author :
Mizutani, M. ; Katoh, H. ; Panina, V. ; Mohri, K. ; Humphrey, F.E.
Author_Institution :
NTN Ltd., Iwata, Japan
fDate :
11/1/1993 12:00:00 AM
Abstract :
A new distance sensor utilizing stepwise domain wall propagation caused by a pulse wire current train in a twisted magnetostrictive amorphous wire is presented. A 1000-mm long digital distance sensor having a nonlinearity of 0.5% FS and a simple construction is realized. The sensor characteristics are controlled by applying torsion. The stepwise domain wall propagation characteristics are compared with those for a steady state domain wall propagation
Keywords :
Barkhausen effect; distance measurement; electric sensing devices; magnetic domain walls; magnetic properties of amorphous substances; magnetostrictive devices; 1000 mm; distance sensor; large Barkhausen effect; stepwise domain wall propagation; torsion; twisted amorphous magnetostrictive wires; wire current pulse train; Amorphous magnetic materials; Amorphous materials; Coils; Magnetic anisotropy; Magnetic domain walls; Magnetic sensors; Magnetostriction; Perpendicular magnetic anisotropy; Sensor phenomena and characterization; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
