Vol.5, No 1, 2008 pp. 59 - 72
UDC 534.6:550.837
INFLUENCE OF ULTRASONIC TRANSDUCER ACOUSTIC
IMPEDANCES AND
DIMENSIONS ON ITS INPUT ELECTRICAL IMPEDANCE
Dragan Mancic, Milan Radmanovic, Zoran Petrusic, Goran Stancic
Faculty of Electronic Engineering, University of Niš, Serbia
E-mail: dragan.mancic@elfak.ni.ac.yu;
milan.radmanovic@elfak.ni.ac.yu;
zoran.petrusic@elfak.ni.ac.yu;
goran.stancic@elfak.ni.ac.yu
Abstract. In this paper the influence of the loads on all contour
surfaces of an ultrasonic sandwich transducer on its input electrical impedance
is considered. Additionally, input electrical impedance is analyzed as
a function of all the dimensions of the sandwich transducer constitutive
parts. The three-dimensional matrix model of ultrasonic sandwich transducers,
recently proposed by the authors, has been used. In the analysis of the
complete power ultrasonic sandwich transducers, these influences are for
the first time considered in the presented way.
Key Words: Ultrasonic transducer, Electrical impedance, Acoustic
impedance
UTICAJ AKUSTIČKOG OPTEREĆENJA I DIMENZIJA
ULTRAZVUČNOG PRETVARAČA
NA NJEGOVU ULAZNU ELEKTRIČNU IMPEDANSU
U ovom radu razmatran je uticaj akustičkog opterećenja na svim konturnim
površinama ultrazvučnog sendvič pretvarača, na njegovu ulaznu električnu
impedansu. Pored toga, ulazna električna impedansa analizirana je i u
funkciji dimenzija svih sastavnih delova sendvič pretvarača. Primenjen
je 3D matrični model ultrazvučnih sendvič pretvarača koji su autori
ranije predložili. Ovi uticaji su po prvi put razmatrani na prikazani
način u analizi kompletnih snažnih ultrazvučnih sendvič pretvarača.
Ključne reči: Ultrazvučni pretvarač, Electrična impedansa,
Akustička impedansa
