HYDROACOUSTICS
ANNUAL JOURNAL |
START | NEW VOL 20 | SEARCH | STATISTICS | PAS - GDANSK DIVISION |
pp. 33-38, vol. 15, 2012 Andrzej Elminowicz OBR Centrum Techniki Morskiej S.A., Gdynia, Poland Waldemar Lis Gdansk University of Technology, Gdańsk, Poland Leonard Zajączkowski OBR Centrum Techniki Morskiej S.A., Gdynia, Poland Key words: active array; TVR; RVS; impedance Abstract: This paper describes of new approach to Multifrequency Wideband Arrays (MWA),
applied piezocomposite technologies of the array elements. MWA operating in transmitting
(Tx) and receiving (Rx) mode on two or three bands, requires state-of-the-art technology and
efficient array designing than conventional array in which separate arrays for every band or
even separate Tx and Rx transducers/arrays are used. The new piezocomposite elements are
designed at OBR Centrum Techniki Morskiej S.A., manufactured by Materials Systems Inc.
(Littleton, USA) and tested at the cooperation with Gdansk University of Technology.
The article presents research and development work at the multifrequency wideband
piezocomposite arrays elements. An example of dual frequency wideband Tx/Rx array with
design parameters and its implementation for the dual frequency wideband sonar will be
presented. The results of array elements measurements: TVR, RVS, Impedance and Phase
versus frequency from 50 kHz to 500 kHz as well as beam patterns, will be also presented.
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