Noncontact Manipulation of Light Objects Based on Parameter Modulations of Acoustic Pressure Nodes
Noncontact Manipulation of Light Objects Based on Parameter Modulations of Acoustic Pressure Nodes
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DOI：
10.1115/1.4023816
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发表时间：
2013-06-01
影响因子：
1.7
通讯作者：
Ro, Paul I.
中科院分区：
文献类型：
--
作者：
Park, Joong-kyoo;Ro, Paul I.
研究了基于声悬浮的空气中非接触操作技术。驻波声悬浮（SWAL）是驻波在压力波节处捕获小物体的过程。本文采用两个超声换能器（BLT）通过调制两个行波的参数来产生行波，从而操纵被困物体。利用两个致动器的频率、振幅和相位调制。从仿真和实验结果来看，相位调制由于其长范围和平滑操作而在其他方法中突出。研究还发现，在参数调制过程中，两个致动器之间的角度会影响被捕获物体的轨迹。在一定的倾斜角度下，通过参数组合实验观察到了物体的正弦和椭圆轨迹。
An investigation of noncontact manipulation techniques based on acoustic levitation was undertaken in air. The standing wave acoustic levitation (SWAL) was observed when standing waves trap small objects at pressure nodes. In this paper, two ultrasonic bolt-clamped Langevin type transducers (BLTs) generating traveling waves by modulating parameters of the two traveling waves were used to manipulate a trapped object. Frequency, amplitude, and phase modulations of the two actuators were exploited. From simulation and experiments, the phase modulation was prominent among other methods due to its long range and smooth operation. It is also found that angles between two actuators affect the trajectory of the trapped object during the parameter modulations. Sinusoidal and elliptic paths of the object were observed experimentally through a combination of parameters at certain tilt angles.