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Updated: Jan 26, 2026
08:19
Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
Published on: May 9, 2021
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Two-Dimensional Manipulation in Mid-Air Using a Single Transducer Acoustic Levitator.
Harri Wijaya1, Kourosh Latifi2, Quan Zhou3
1Department of Electrical Engineering and Automation, Aalto University, 02150 Espoo, Finland. harri.wijaya@aalto.fi.
Micromachines
|April 21, 2019
Summary
This study introduces a novel single transducer acoustic levitator for two-dimensional object manipulation. It precisely controls levitated microspheres along programmed paths using frequency switching and tilting angles.
Area of Science:
- Acoustic manipulation
- Microparticle handling
- Robotics and control systems
Background:
- Acoustic levitation offers contactless manipulation capabilities.
- Controlling levitated objects in multiple dimensions remains a challenge.
- Existing methods often require complex transducer arrays.
Purpose of the Study:
- To develop a simplified single transducer acoustic levitator for 2D manipulation.
- To investigate the influence of vibration frequency and reflector angle on levitation.
- To demonstrate precise trajectory control of levitated microparticles.
Main Methods:
- Utilized a centrally actuated vibrating plate and a flat reflector.
- Employed frequency switching with composite signals for enhanced control.
- Recorded levitation positions to establish control parameters.
Main Results:
- Demonstrated 2D acoustic manipulation using a single transducer.
- Levitation position was found to be dependent on vibration frequency and tilting angle.
- Achieved trajectory control of levitated microspheres with a mean position error of 155 ± 84 µm.
Conclusions:
- A single transducer acoustic levitator can achieve precise 2D manipulation.
- Frequency switching and tilting angle are key parameters for control.
- This technology enables programmable manipulation of microparticle clusters.
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