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Two-Dimensional Manipulation in Mid-Air Using a Single Transducer Acoustic Levitator

Department of Electrical Engineering and Automation, Aalto University, 02150 Espoo, Finland
Author to whom correspondence should be addressed.
Micromachines 2019, 10(4), 257;
Received: 21 March 2019 / Revised: 12 April 2019 / Accepted: 17 April 2019 / Published: 18 April 2019
(This article belongs to the Special Issue Robotic Micromanipulation)
PDF [4280 KB, uploaded 18 April 2019]


We report a single transducer acoustic levitator capable of manipulating objects in two-dimensions. The levitator consists of a centrally actuated vibrating plate and a flat reflector. We show that the levitation position of the object depends not only on the vibration frequency, but also on the tilting angle between the plate and the reflector. Additionally, new levitation positions can be created by actuating the plate with a composite signal of two frequencies using frequency switching. Based on recorded levitation positions, such single transducer acoustic levitator can manipulate a cluster of levitated microspheres in predefined trajectories, with mean position error of 155 ± 84 µm. View Full-Text
Keywords: acoustic levitation; contactless manipulation; Chladni plate acoustic levitation; contactless manipulation; Chladni plate

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Wijaya, H.; Latifi, K.; Zhou, Q. Two-Dimensional Manipulation in Mid-Air Using a Single Transducer Acoustic Levitator. Micromachines 2019, 10, 257.

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