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| Paper Abstract and Keywords | ||
| Presentation | 2022-07-29 13:30 Thin ultrasound touchless sensor using flexural vibration Natsumi Nakaoka, Eimei Yamamoto, Daisuke Koyama (Doshisha Univ.)  US2022-22 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | This paper investigates a method to detect the position of an object in front of an ultrasonic vibrator using changes in the radiation impedance. The acoustic touchless sensor is composed of a rectangular vibrating plate (width: 20 mm; length: 100 mm; thickness: 1 mm) and a PZT transducer (width: 20 mm; length: 20 mm; thickness: 2 mm). The sensor configuration was determined based on the results of a finite element analysis simulation, and the object to be detected was arranged parallel to the sensor surface. A stripe flexural vibration mode was excited on the plate at the resonance frequency, thus radiating the sound wave into the air between the plate and the object. The effects of the acoustic field between the object and the plate on the sensor’s detection characteristics were investigated. When an acoustic standing-wave field was generated in the air, the electrical impedance of the ultrasound transducers changed dramatically, thus indicating that the radiation impedance of the sensor was dependent on the object position. By measuring the amplitude of the input current to the transducers and the phase difference between the input current and the voltage applied to the sensor, the object position could be determined uniquely within a two-dimensional area of 60×27 mm2. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | ultrasound / touchless display / piezoelectric sensor / radiation impedance / / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 122, no. 141, US2022-22, pp. 12-16, July 2022. | |
| Paper # | US2022-22 | |
| Date of Issue | 2022-07-22 (US) | |
| ISSN | 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) | |
| Download PDF | US2022-22 |
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| Conference Information | |
| Committee | US |
| Conference Date | 2022-07-29 - 2022-07-29 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Kyushu Univ. (Chikushi Campus) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Material characterization, Ultrasonics, etc. |
| Paper Information | |
| Registration To | US |
| Conference Code | 2022-07-US |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Thin ultrasound touchless sensor using flexural vibration |
| Sub Title (in English) | |
| Keyword(1) | ultrasound |
| Keyword(2) | touchless display |
| Keyword(3) | piezoelectric sensor |
| Keyword(4) | radiation impedance |
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| 1st Author's Name | Natsumi Nakaoka |
| 1st Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 2nd Author's Name | Eimei Yamamoto |
| 2nd Author's Affiliation | Doshisha University (Doshisha Univ.) |
| 3rd Author's Name | Daisuke Koyama |
| 3rd Author's Affiliation | Doshisha University (Doshisha Univ.) |
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| Speaker | Author-1 |
| Date Time | 2022-07-29 13:30:00 |
| Presentation Time | 25 minutes |
| Registration for | US |
| Paper # | US2022-22 |
| Volume (vol) | vol.122 |
| Number (no) | no.141 |
| Page | pp.12-16 |
| #Pages | 5 |
| Date of Issue | 2022-07-22 (US) |
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