The effect of magnetic bias on an acoustic vibration element using giant magnetostrictive material (AVEG), used as is a low-frequency transducer for ocean acoustics tomography systems, is studied. By measuring the magnetostriction characteristics, it is shown that magnetic bias applied using a magnet is effective, and that the dynamic range must be less than 1=+or-1(A). The magnetic circuit of AVEG is analyzed and the value of the magnetic bias field is calculated. The structure of the magnetic circuit is evaluated in terms of the variation rate of flux density in the vibrator, the effective rate of flux, and the magnetostriction sensitivity.
Effect of magnetic bias on acoustic vibration element using giant magnetostrictive material
Einfluß einer Vormagnetisierung auf ein akustisches Schwingungselement aus einem Material mit Riesenmagnetostriktion
IEEE Translation Journal on Magnetics in Japan ; 8 , 2 ; 107-111
1993
5 Seiten, 1 Quelle
Aufsatz (Zeitschrift)
Englisch
Schallempfänger , Methode der finiten Elemente , magnetischer Kreis , magnetostriktives Bauelement , Ozeanographie , Unterwasserschall , Vormagnetisierung , akustisches Bauelement , magnetischer Stoff , Messen magnetischer Größen , Flussdichte (magnetisch) , Ultraschallwandler , magnetische Induktion
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