Title :
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
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;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
