M.S. Martins, mmartins(at)dei.uminho.pt
C. Barardo, mmartins(at)dei.uminho.pt
T. Matos, mmartins(at)dei.uminho.pt
L.M. Gonçalves, mmartins(at)dei.uminho.pt
J. Cabral, mmartins(at)dei.uminho.pt
MEMS-UMinho, University of Minho, Campus of Azurém, Guimarães, Portugal
A Silva, asilva(at)ualg.pt
S.M. Jesus sjesus(at)ualg.pt
LARSys, University of Algarve, Campus de Gambelas, PT-8005-139 Faro, Portugal.
Comments: download pdf file (not available).
Ref.: MTS/IEEE Oceans, Aberdeen, June 2017.
Abstract
This work describes the development and characterization of a wide beam and wideband ultrasonic
transducer, designed as an emitter for underwater communications up to 1.5 MHz. The active
element being used is composed of two layers of 110 μm PVDF (Polyvinylidene fluoride) film,
with NiCu electrodes. The transducer has a semicircular shape with a diameter of 15 cm. Pool
trials show a transmitting voltage response of approximately 150 dB re μPa/V@ 1m from 750kHz
to 1MHz and higher than 130 dB re μPa/V @1m between 250kHz and 1.5MHz. At 1 MHz, when excited
with 12V, the transducer has a power consumption of 37.5 mW.
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