空气中毫米级物体的灵巧超声悬浮

Dexterous ultrasonic levitation of millimeter-sized objects in air.

作者信息

Seah Sue Ann, Drinkwater Bruce W, Carter Tom, Malkin Rob, Subramanian Sriram

出版信息

IEEE Trans Ultrason Ferroelectr Freq Control. 2014 Jul;61(7):1233-6. doi: 10.1109/TUFFC.2014.3022.

DOI:10.1109/TUFFC.2014.3022

Abstract

Acoustic levitation in air has applications in contactless handling and processing. Here a first-order Bessel function-shaped acoustic field, generated using an 8-element circular array operating at 40 kHz, traps millimeter-sized objects against gravity. The device can manipulate objects in a vertical plane over a few millimeters with an accuracy of ± 0.09 mm.

摘要

空气中的声悬浮在非接触式处理方面有应用。在此，使用一个工作在40kHz的8元圆形阵列产生的一阶贝塞尔函数形状的声场，能克服重力捕获毫米尺寸的物体。该装置可在几毫米的垂直平面内以±0.09毫米的精度操纵物体。