Abstract:

A particle suspension transport method  was proposed based on ultrasonic composite field.Firstly,the array focusing model and accumulated force equation were established based on phased array ultrasonic cells delay,then integrated with the standing wave ultrasonic field radiation force calculation method, the particle motion control model and driving force formula under the combined ultrasound field were introduced.Through the MATLAB simulation of complex ultrasound field, the factors that affected the focusing performance and control performance were analysed,and  the  preliminary test results were given and discussed.Finally,arbitrary control scheme of particle motion was put forward by compound ultrasonic driving field.

Key words: inner machining, ultrasonic suspension, composite field, particle transportation

摘要：

提出了基于超声复合场驱动微粒悬浮输运方法。首先从超声相控阵列的延时聚焦原理出发，建立了空间任意点聚焦模型和作用力公式，然后利用超声驻波场辐射力计算方法，建立了微粒在超声复合场下的运动控制模型和驱动力公式。通过MATLAB模拟复合声场，分析了影响聚焦性能和控制性能的因素，给出了初步实验验证结果。最后提出了任意控制微粒运动的超声复合场驱动方案。

关键词: 内加工, 超声悬浮, 复合场, 微粒输运