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Experimental evaluation of three designs of electrodynamic flexural transducers
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Eriksson, Tobias J. R., Laws, Michael R., Kang, Lei, Fan, Yichao, Ramadas, Sivaram Nishal and Dixon, Steve M. (2016) Experimental evaluation of three designs of electrodynamic flexural transducers. Sensors, 16 (9). 1363. doi:10.3390/s16091363 ISSN 1424-8220.
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Official URL: https://doi.org/10.3390/s16091363
Abstract
Three designs for electrodynamic flexural transducers (EDFT) for air-coupled ultrasonics are presented and compared. An all-metal housing was used for robustness, which makes the designs more suitable for industrial applications. The housing is designed such that there is a thin metal plate at the front, with a fundamental flexural vibration mode at ∼50 kHz. By using a flexural resonance mode, good coupling to the load medium was achieved without the use of matching layers. The front radiating plate is actuated electrodynamically by a spiral coil inside the transducer, which produces an induced magnetic field when an AC current is applied to it. The transducers operate without the use of piezoelectric materials, which can simplify manufacturing and prolong the lifetime of the transducers, as well as open up possibilities for high-temperature applications. The results show that different designs perform best for the generation and reception of ultrasound. All three designs produced large acoustic pressure outputs, with a recorded sound pressure level (SPL) above 120 dB at a 40 cm distance from the highest output transducer. The sensitivity of the transducers was low, however, with single shot signal-to-noise ratio
Item Type: | Journal Article | ||||||||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||
Library of Congress Subject Headings (LCSH): | Transducers, Flexure, Ultrasonics, Piezoelectric materials | ||||||||||
Journal or Publication Title: | Sensors | ||||||||||
Publisher: | MDPI AG | ||||||||||
ISSN: | 1424-8220 | ||||||||||
Official Date: | August 2016 | ||||||||||
Dates: |
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Volume: | 16 | ||||||||||
Number: | 9 | ||||||||||
Article Number: | 1363 | ||||||||||
DOI: | 10.3390/s16091363 | ||||||||||
Status: | Peer Reviewed | ||||||||||
Publication Status: | Published | ||||||||||
Access rights to Published version: | Restricted or Subscription Access | ||||||||||
Date of first compliant deposit: | 9 February 2017 | ||||||||||
Date of first compliant Open Access: | 9 February 2017 | ||||||||||
Funder: | Marie Curie Industry-Academia Pathways & Partnerships (IAPP) | ||||||||||
Grant number: | SACUT EU project (ref. no. 612118) |
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