Dynamic characteristics of acoustic levitation under probe manipulation  

作　　者：WANG Zhiyuan XIE Wenjun 

机构地区：[1]School of Physical Science and Technology,Northwestern Polytechnical University,Xi’an 710072

出　　处：《Chinese Journal of Acoustics》2025年第1期32-44,共13页声学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(52471048,52088101,52225406);the National Key R&D Program of China(2021YFA0716301);the AECC Industry-University-Research Collaboration Program(HFZL2021CXY019).

摘　　要：Based on a protype that combines a single-axis acoustic levitator with a cylindrical probe,the kinematic and dynamic characteristics of an acoustically levitated spherical sample are studied when the probe enters and exits the sound field horizontally.The experiment shows that,within a certain distance,the approaching of the probe increases the vibration amplitude and reduces the vibration frequency of the levitated sample,and has an attraction effect on the sample.The critical detachment distance when the probe exits the sound field is larger than the critical attachment distance when it enters the sound field,showing a hysteresis effect.The critical attachment distance and the critical detachment distance are both proportional to the probe diameter.The finite element calculation reveals that the mechanism of the attraction effect is the non-axisymmetric distribution of sound field induced by the probe,which produces a net component of acoustic radiation force directed towards the probe.The calculation also reveals the influence of probe position and diameter on the maximum offset distances of the sample and the frequency of horizontal vibration,which is consistent with the experimental results.

关 键 词：Acoustic levitation Acoustic manipulation PROBE Acoustic radiation force 

分 类 号：O42[理学—声学]