Wideband and Wide Beam Polyvinylidene Difluoride (PVDF) Acoustic Transducer for Broadband Underwater Communications

Sensors

Sérgio M. Jesus¹  António Silva¹  Carlos L. Faria²  Marcos S. Martins²  Luís M. Goncalves²  José Cabral²  Tiago Matos² 

[1] LARSyS, University of Algarve Campus de Gambelas, 8005-139 Faro, Portugal;MEMS-UMinho, University of Minho, Campus of Azurém, 4800-058 Guimarães, Portugal;

关键词: polymer ultrasound transducer;    PVDF acoustic emitter;    wideband acoustic emitter;    wide beam acoustic emitter;    very high frequency acoustic emitter;    acoustic broadband communications;    underwater wireless communications;   

DOI  :  10.3390/s19183991

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown