Paper Abstract and Keywords |
Presentation |
2009-05-29 14:00
Noncontact ultrasonic manipulation of small objects for a long distance using a bending vibrator and a reflector Daisuke Koyama, Kentaro Nakamura (Tokyo Inst. of Tech.) US2009-10 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
Ultrasonic manipulation of small particles including a liquid droplet for a long distance is discussed. It is well known that a particle, which is much smaller than a wavelength of acoustic standing wave, can be trapped at the nodal points. The experimental setup consists of a 3-mm-thick and 605-mm-long duralumin bending vibrating plate and a reflector. Two bolt-clamped Langevin type transducers with horns were attached on the both sides of the vibrating plate to generate the flexural vibration along the plate. The plane reflector with the same dimension as the vibrator is installed parallel to the vibrating plate with the distance of approximately 17 mm to generate an ultrasonic standing wave between them and trap the small particles along the nodal lines. The acoustic field and the acoustic radiation force between the plate and reflector were calculated through the finite element analysis (FEA) to predict the trapped position of the particles. The sound pressure distribution was measured experimentally by using a scanning laser Doppler vibrometer. By controlling the driving phase difference between the two transducers, the flexural traveling wave can be generated along the vibrating plate, and the vertical nodal lines of standing wave and the trapped particles can be moved. The flexural wave was excited along the plate at 22.5 kHz. The lattice standing wave with the wavelength of 36 mm in the length direction could be excited between the plate and reflector, and foam polystyrene particles with the radii of several mm could be trapped at the node lines of standing wave. The experimental and calculated results showed a good agreement on the relationship between the driving phase difference and the trapped position of the particles. The noncontact transportation of the trapped particles for a long distance could be achieved by changing the driving phase difference: the trapped position of particles can be controlled as 0.046 mm/deg. An ethanol droplet could be also trapped and moved. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
Noncontact manipulation / Ultrasound / Bending vibration / Lattice standing wave / Droplet / / / |
Reference Info. |
IEICE Tech. Rep., vol. 109, no. 68, US2009-10, pp. 13-18, May 2009. |
Paper # |
US2009-10 |
Date of Issue |
2009-05-22 (US) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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US2009-10 |
Conference Information |
Committee |
US |
Conference Date |
2009-05-29 - 2009-05-29 |
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(See Japanese page) |
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Paper Information |
Registration To |
US |
Conference Code |
2009-05-US |
Language |
Japanese |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Noncontact ultrasonic manipulation of small objects for a long distance using a bending vibrator and a reflector |
Sub Title (in English) |
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Keyword(1) |
Noncontact manipulation |
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Ultrasound |
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Bending vibration |
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Lattice standing wave |
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Droplet |
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1st Author's Name |
Daisuke Koyama |
1st Author's Affiliation |
Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
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Kentaro Nakamura |
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Tokyo Institute of Technology (Tokyo Inst. of Tech.) |
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Speaker |
Author-1 |
Date Time |
2009-05-29 14:00:00 |
Presentation Time |
30 minutes |
Registration for |
US |
Paper # |
US2009-10 |
Volume (vol) |
vol.109 |
Number (no) |
no.68 |
Page |
pp.13-18 |
#Pages |
6 |
Date of Issue |
2009-05-22 (US) |
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