2012•Seisan Kakou, Kousaku Kikai Bumon Kouenkai kouen rombunshuu/Seisan Kako, Kosaku Kikai Bumon KoenkaiOpen access
E08 An Artifice of Classification in Acoustic Standing Wave Field
Takuya Itou, Tomohiro Inada, Hiroto GOCHOU, Keisuke Kurosawa, Libo Zhou, Jun Shimizu, Teppei Onuki
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Abstract
Object forced by levitation force in node of acoustic standing wave field. Levitation force affects the amplitude and frequency. It is possible to classify object by density and size. First described the theoretical analysis of levitation force generated in a standing wave field. A simulation is then performed to work-out the wave amplitude required to levitate the abrasive. We have developed the system which consists of a transducer (PZT), a reflector (an aluminum plate), an amplifier and PC, and tested the acoustic levitation phenomenon of abrasive in a cylindrical tube. It is found that the relation between the particle size and the power of the acoustic field (wave amplitude) was in fair agreed with the prediction by modified Gor Kov's theorem. In this study, we are going to basic research of new classification using the levitation force in acoustic standing wave field.
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