M.S. Martins, mmartins(at)dei.uminho.pt
C.L. Faria, carlosfaria(at)dei.uminho.pt
T. Matos, b7567(at)dei.uminho.pt
L.M. Gonçalves, lgoncalves(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.
N. Cruz ncruz(at)fe.up.pt
INESC TEC and FEUP, Rua Dr. Roberto Frias, 4200-465 Porto, PT
Comments: download pdf file.
Ref.: MTS/IEEE Oceans, Marseille, June 2019.
Abstract
The lack of penetration of light and electromagnetic radiation beyond a few meters in
the ocean makes acoustics the technique of choice for data transmission, target detection
and ocean sensing in general. Acoustic transducers are typically based on piezoelectric
materials due to the good response at high frequencies. Depending on the application it
can be built using ceramics, polymers and composite materials. In the hydrostatic mode
PZT ceramics hydrophones have low performance due to the low hydrostatic piezoelectric
stress value. On the other hand, PVDF have shown relatively high hydrostatic mode response.
This work presents the development of a PVDF hydrophone for deep sea applications. The
hydrophone was subjected to a pressure test up to 25 MPa to evaluate the response variation
under high hydrostatic pressure. The results show an increase up to 6 dB sensitivity under
15 MPa pressure.
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