Title: Single-axis ultrasound levitation system with annular clamping forces

Author(s): YIN Guanjun; LI Pan; FAN Haoran; GUO Jianzhong

Affiliation(s): Institute of Applied Acoustics, School of Physics and Information Technology, Shaanxi Normal University

Abstract: Based on the principle of acoustic levitation, a single-axis ultrasonic levitation system(SAULS) with convex sides was designed. A normal SAULS only provides a levitation force(LF) against the gravity of the sample. While, such systems also provide an annular clamping force(ACF) surrounding the levitated samples, and improve levitation stability of samples in the standing wave field. Using the finite-difference time-domain method, we investigated the force distributions in different resonance cavities and the factors that influence the magnitude of the levitation force in optimizing the SAULS and the ACF. The theoretical analyses and experimental results indicate that the stability of levitation in this special SAULS is improved with the ACF from its designed convex-side feature. It can be developed into a simple device in levitating and moving samples steadily in related experiments and applications.