Abstract
A noncontact manipulation technique is useful for micromachine technology. In this paper, we describe an advanced manipulation technique for trapping and transporting small objects in air. A standing wave field was generated by two sound beams crossing each other generated by bolted Langevin transducers. Expanded polystyrene particles were trapped at the nodes of the sound pressure in the standing wave field. The position of a trapped particle was shifted by changing the phase difference between the two sound beams. The force was culated from the sound pressure distribution by Rayleigh's formula. The calculated result agrees with the experimental data.
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