Liu Yanyan, Hu Junhui
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore.
IEEE Trans Ultrason Ferroelectr Freq Control. 2009 Apr;56(4):798-805. doi: 10.1109/TUFFC.2009.1102.
In this paper, the ultrasonic trapping of small particles by a vibrating rod is proposed and analyzed. An aluminum rod, which is driven by an actuator and operates in the 0 th order vibration mode (back and forth vibration mode), can trap small particles in water. The experimental phenomena and the trapping mechanism are theoretically analyzed, and the acoustic radiation force acting on a spherical particle near the surface of the vibrating rod is estimated. The effects of operating frequency, rod radius, particle radius and other physical parameters are investigated experimentally and theoretically, and useful guidelines to optimize the trapping capability are proposed.
本文提出并分析了通过振动杆对小颗粒进行超声捕获的方法。一根由致动器驱动并以零阶振动模式（来回振动模式）工作的铝棒，可以在水中捕获小颗粒。从理论上分析了实验现象和捕获机制，并估算了作用在振动杆表面附近球形颗粒上的声辐射力。通过实验和理论研究了工作频率、杆半径、颗粒半径等物理参数的影响，并提出了优化捕获能力的有用指导方针。
