南京师大学报（自然科学版）2025，Vol.48Issue(4)：1-13,13.DOI:10.3969/j.issn.1001-4616.2025.04.001
基于斜入射聚焦声场干涉的粒子悬浮操控研究
Research on Particle Suspension Manipulation Based on Obliquely Incident Focused Acoustic Field Interference
摘要
Abstract
As a newly emerging particle manipulation technology in recent years,acoustic tweezers show strong application potential in medicine,biology,materials science and other disciplines due to its many advantages such as non-labeling,non-contact,non-destructive,high safety and a wide range of manipulative materials.At present,among the mainstream acoustic tweezers,the acoustic radiation force of traveling wave acoustic tweezers is generally small,the axial particle control ability is poor,and complex circuits and algorithms are required,and the cost is high.The particle control of standing wave acoustic tweezers can only be realized in the middle area of the complete set of acoustic devices,and the application scenarios and maneuverability are limited.Therefore,this study proposes a three-dimensional particle suspension control method based on oblique incidence focused acoustic field interference,constructs oblique incidence focused edge phase dislocation interference acoustic field,and generates sufficient acoustic radiation force.While stable suspension and three-dimensional control of particles in water can be realized,the control area is no longer limited to the transducer pair or the center area of the transducer array,and the drive system is relatively simple.It provides a new framework for the suspension and three-dimensional control of particles in water.The research shows that 2m low sound pressure potential wells can be formed in the focal plane by oblique incidence interference of the focused edge dislocation with mode m.When the deflection angle of the transducer is 45° and the surface vibration velocity of the transducer is 0.03 m/s,It can provide a peak axial radiation force of 18 μN and a peak radial radiation force of 0.3 μN for polystyrene particles with a radius of 150 μm to achieve particle suspension capture.At the same time,the acoustic radiation force is negatively correlated with the mode and deflection Angle,and the acoustic well distribution in the interference sound field is closely related to the side dislocation mode,the initial phase difference,the deflection angle of the transducer and the inverse orientation of the initial phase,etc.,through the deflection angle and the initial phase,the arrangement density of the captured particles and the axial capture position can be directly regulated,so as to realize the three-dimensional control of the acoustic well.Finally,the experimental platform of oblique incidence focusing interferometric sound field is built,and the experiment of sound field measurement and particle manipulation is carried out.The acoustic field measurement results are in good agreement with the numerical simulation results.The stable control and capture experiments of polystyrene particles demonstrate the suspension and real-time control ability of the interferometer acoustic field.关键词
斜入射聚焦声场干涉/聚焦换能器阵列/聚焦边位错声束/粒子悬浮与操控Key words
obliquely incident focused acoustic field interference/focused sector transducer array/focused edge phase dislocation field/particle suspension and manipulation分类
数理科学引用本文复制引用
严文伟,冯庭桢,陈伟,马青玉..基于斜入射聚焦声场干涉的粒子悬浮操控研究[J].南京师大学报（自然科学版）,2025,48(4):1-13,13.基金项目
国家自然科学基金项目(11974187)、江苏省自然科学基金项目(BE2022814). （11974187）
