Linearized magnetoacoustic sensor of angular displacements

Author

Pernod, Philippe ; Preobrazhensky, Vladimir ; Dequand, Sylvie

Author_Institution

Dept. Opto-Acoust. Electron., Inst. d´´Electron. et de Microelectron. du Nord, Villeneuve d´´Ascq, France

Volume

46

Issue

1

fYear

1999

Firstpage

239

Lastpage

241

Abstract

The design of a quasilinear sensor of angular displacements based on acoustic resonance in an antiferromagnetic single crystal was considered. The frequency versus angle dependence of a crystalline /spl alpha/-Fe/sub 2/O/sub 3/ acoustic resonator placed in a rotating inhomogeneous bias field was studied experimentally. A linearization of this dependence was obtained, respectively, for frequency and angular operation ranges equal to /spl Delta/f/f/sub max/=14% and /spl Delta//spl theta/=140.

Keywords

acoustic resonators; angular measurement; antiferromagnetic materials; iron compounds; magnetic sensors; magnetoacoustic resonance; /spl alpha/-Fe/sub 2/O/sub 3/ acoustic resonator; Fe/sub 2/O/sub 3/; acoustic resonance; angular displacement; antiferromagnetic single crystal; linearization; quasilinear magnetoacoustic sensor; rotating inhomogeneous bias field; Acoustic sensors; Crystallization; Magnetic field measurement; Magnetic fields; Magnetic materials; Magnetic resonance; Magnetic sensors; Mechanical sensors; Resonant frequency; Temperature sensors;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.741540

Filename

741540