双凹面聚焦超声波场中悬浮粒子操控原理与实验仿真  

The Mechanism and Simulation of Suspended Particle Manipulation in a Double Concave Focused Ultrasonic Field

作　　者：唐小煜[1] 严雅琳 黎廷丰 朱琳琳 黎铭 蔡伟博 TANG Xiaoyu;YAN Yalin;LI Tingfeng;ZHU Linlin;LI Ming;CAI Weibo(Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials∥Guangdong Provincial Engineering Technology Research Center for Optoelectronic Instrument∥National Demonstration Center for Experimental Physics Education∥School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China)

机构地区：[1]广东省量子调控工程与材料重点实验室/广东省光电检测仪器工程技术研究中心/物理国家级实验教学示范中心/华南师范大学物理与电信工程学院,广州510006

出　　处：《华南师范大学学报（自然科学版）》2021年第4期17-23,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(61371176);广州市高校创新创业教育项目(2019HD206);广东省大学生创新创业训练项目(S202010574090);广东省高校辅导员队伍建设专项课题(2019FDY022)。

摘　　要：为提高聚焦超声波场的悬浮能力以及拓宽悬浮粒子的移动区域,研究了超声波场中声压大小的计算公式以及凹球面阵列中阵元的延迟时间与聚焦点位置的关系式,并运用COMSOL多物理场软件进行仿真验证.通过搭建双凹球面超声波阵列悬浮装置,控制发射极信号相位实现了悬浮粒子在竖直方向上的移动,实验中粒子的运动轨迹与仿真结果有较好的一致性.结果表明:双凹球面超声波阵列声场声压更强、聚焦性更好,且可通过对阵元相位信号的控制实现悬浮粒子在二维平面的移动.In order to improve the suspension ability of focused ultrasonic field and broaden the moving area of suspended particles,the calculation formula of sound pressure in the ultrasonic field and the relation between the delay time of array elements and the focus position in concave spherical array were studied.COMSOL multiphysics was used for simulation verification.By building a levitation device for the concave spherical ultrasonic array,the phase of emitter signal was controlled to realize the movement of suspended particles in the vertical direction.The particle motion trajectory in the experiment was in good agreement with that in the simulation experiment.The results showed that the double concave spherical ultrasonic array had stronger sound pressure and better focusing ability and the motion of the suspended particles in the two-dimensional plane could be realized with phase signal control.

关 键 词：凹球面超声波阵列 声压 悬浮 COMSOL 多物理场 

分 类 号：TP273.2[自动化与计算机技术—检测技术与自动化装置] O422.5[自动化与计算机技术—控制科学与工程]