Controlling the motion of multiple objects on a Chladni plate

Quan Zhou (), Veikko Sariola, Kourosh Latifi and Ville Liimatainen
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Quan Zhou: School of Electrical Engineering, Aalto University
Veikko Sariola: School of Electrical Engineering, Aalto University
Kourosh Latifi: School of Electrical Engineering, Aalto University
Ville Liimatainen: School of Electrical Engineering, Aalto University

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract The origin of the idea of moving objects by acoustic vibration can be traced back to 1787, when Ernst Chladni reported the first detailed studies on the aggregation of sand onto nodal lines of a vibrating plate. Since then and to this date, the prevailing view has been that the particle motion out of nodal lines is random, implying uncontrollability. But how random really is the out-of-nodal-lines motion on a Chladni plate? Here we show that the motion is sufficiently regular to be statistically modelled, predicted and controlled. By playing carefully selected musical notes, we can control the position of multiple objects simultaneously and independently using a single acoustic actuator. Our method allows independent trajectory following, pattern transformation and sorting of multiple miniature objects in a wide range of materials, including electronic components, water droplets loaded on solid carriers, plant seeds, candy balls and metal parts.

Date: 2016
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DOI: 10.1038/ncomms12764

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