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首页> 外文期刊>IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control >Two-dimensional noncontact transportation of small objects in air using flexural vibration of a plate
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Two-dimensional noncontact transportation of small objects in air using flexural vibration of a plate

机译：利用板的弯曲振动在空气中进行小物体的二维非接触式运输

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This paper investigates a two-dimensional ultrasonic manipulation technique for small objects in air. The ultrasonic levitation system consists of a rectangular vibrating plate with four ultrasonic transducers and a reflector. The configuration of the vibrator, the resonant frequency, and the positions of the four transducers with step horns were determined from finite element analysis such that an intense acoustic standing-wave field could be generated between the plates. A lattice flexural vibration mode with a wavelength of 28.3 mm was excited on the prototype plate at 24.6 kHz. Small objects could get trapped in air along the horizontal nodal plane of the standing wave. By controlling the driving phase difference between the transducers, trapped objects could be transported without contact in a two-dimensional plane. When the phase difference was changed from 0° to 720°, the distance moved by a small particle in the orthogonal direction was approximately 29 mm, which corresponds with the wavelength of the flexural vibration on the vibrating plate.
机译：本文研究了一种用于空气中小物体的二维超声处理技术。超声悬浮系统由带有四个超声换能器和反射器的矩形振动板组成。通过有限元分析确定了振动器的配置，谐振频率以及四个带阶跃角的换能器的位置，从而可以在板之间产生强烈的声驻波场。在原型板上以24.6 kHz激发了波长为28.3 mm的晶格弯曲振动模式。小物体可能会沿着驻波的水平节点平面被困在空气中。通过控制换能器之间的驱动相位差，被捕获的物体可以在二维平面内无接触地被传送。当相位差从0°变为720°时，小颗粒在正交方向上移动的距离约为29 mm，与振动板上弯曲振动的波长相对应。

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