Title :
Finite element analysis of a piezoelectric acoustic levitator
Author :
Andrade, Marco A B ; Buiochi, Flávio ; Adamowski, Julio C.
Author_Institution :
Dept. of Mechatron. Eng., Escola Politec. da Univ. de Sao Paulo, Sao Paulo
Abstract :
This work describes the finite element analysis of a piezoelectric acoustic levitator. The acoustic levitator consists of a Langevin transducer and a steel reflector. The finite element method is used to determine the electrical impedance, the transducer face displacement and the acoustic radiation potential that acts on a small sphere. The numerical electrical impedance is compared with that obtained experimentally by an impedance analyzer and the numerical displacement is compared with that obtained by a fiber-optic vibration sensor. The levitator was used to levitate small Styrofoam spheres. The positions of the spheres show good agreement with the positions of minimum acoustic radiation potential.
Keywords :
acoustic transducers; electric impedance; finite element analysis; piezoelectric transducers; Langevin transducer; Styrofoam spheres; acoustic radiation potential; electrical impedance determination; finite element analysis; impedance analyzer; piezoelectric acoustic levitator; steel reflector; Acoustic applications; Acoustic transducers; Finite element methods; Impedance; Levitation; Numerical models; Piezoelectric materials; Piezoelectric transducers; Steel; Ultrasonic transducers; Finite Element Analysis; acoustic levitation; piezoelectric transducer;
Conference_Titel :
Ultrasonics Symposium, 2008. IUS 2008. IEEE
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2428-3
Electronic_ISBN :
978-1-4244-2480-1
DOI :
10.1109/ULTSYM.2008.0343
