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Keywords = PVDF acoustic emitter

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18 pages, 6206 KiB  
Article
Wideband and Wide Beam Polyvinylidene Difluoride (PVDF) Acoustic Transducer for Broadband Underwater Communications
by Marcos S. Martins, Carlos L. Faria, Tiago Matos, Luís M. Goncalves, José Cabral, António Silva and Sérgio M. Jesus
Sensors 2019, 19(18), 3991; https://doi.org/10.3390/s19183991 - 16 Sep 2019
Cited by 15 | Viewed by 5852
Abstract
The advances in wireless communications are still very limited when intended to be used on Underwater Communication Systems mainly due to the adverse proprieties of the submarine channel to the acoustic and radio frequency (RF) waves propagation. This work describes the development and [...] Read more.
The advances in wireless communications are still very limited when intended to be used on Underwater Communication Systems mainly due to the adverse proprieties of the submarine channel to the acoustic and radio frequency (RF) waves propagation. This work describes the development and characterization of a polyvinylidene difluoride ultrasound transducer to be used as an emitter in underwater wireless communications. The transducer has a beam up to 10° × 70° degrees and a usable frequency band up to 1 MHz. The transducer was designed using Finite Elements Methods and compared with real measurements. Pool trials show a transmitting voltage response (TVR) of approximately 150 dB re µPa/V@1 m from 750 kHz to 1 MHz. Sea trials were carried in Ria Formosa, Faro (Portugal) over a 15 m source—receiver communication link. All the signals were successfully detected by cross-correlation using 10 chirp signals between 10 to 900 kHz. Full article
(This article belongs to the Special Issue Marine Sensors: Recent Advances and Challenges)
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