Multifrequency Acoustic Levitation

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http://urn.fi/URN:NBN:fi:hulib-202006112756
Title: Multifrequency Acoustic Levitation
Author: Puranen, Tuomas
Other contributor: Helsingin yliopisto, Matemaattis-luonnontieteellinen tiedekunta
University of Helsinki, Faculty of Science
Helsingfors universitet, Matematisk-naturvetenskapliga fakulteten
Publisher: Helsingin yliopisto
Date: 2020
Language: eng
URI: http://urn.fi/URN:NBN:fi:hulib-202006112756
http://hdl.handle.net/10138/316113
Thesis level: master's thesis
Degree program: Materiaalitutkimuksen maisteriohjelma
Master's Programme in Materials Research
Magisterprogrammet i materialforskning
Specialisation: Elektroniikka ja teollisuusfysiikka
Electronics and Industrial Physics
Elektronik och industrifysik
Discipline: none
Abstract: Acoustic levitation permits non-contacting particle manipulation. The position and orientation of the levitated particle can be controlled by altering the acoustic field. Existing acoustic levitators have employed a single frequency which limits the types of acoustic traps that can be created. The use of multiple frequencies makes it possible to control the forces acting on a particle independently in all directions. I predict theoretically the forces acting on particles placed in the acoustic fields created with multiple coexisting frequencies. I present two traps which demonstrate the benefits of multifrequency acoustic levitation. To realize the traps, I constructed a 450-channel phased array acoustic levitator with individual frequency, phase, and amplitude control for each channel.
Subject: Acoustic Levitation
Acoustic Radiation Force
Ultrasonics
Phased Arrays


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