HYDROACOUSTICS
ANNUAL JOURNAL
START NEW VOL 20 SEARCH STATISTICS PAS - GDANSK DIVISION

High accuracy hydroacoustic system to study codend model parameters

pp. 271-278, vol. 11, 2008

Jacek Marszal
Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems, Gdansk, Poland

Jan Schmidt
Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems, Gdansk, Poland

Andrzej Jedel
Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems, Gdansk, Poland

Aleksander Schmidt
Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems, Gdansk, Poland

Zbigniew Wojan
Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems, Gdansk, Poland

Krzysztof Zachariasz
Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems, Gdansk, Poland

Wojciech LeĊ›niak
Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems, Gdansk, Poland

Key words:

Abstract: An important task of fishing gear designers is to develop effective selective fishing gears by optimizing its geometry. The high accuracy hydroacoustic system for codend geometry measurements was designed for developing the construction of cod codend for the Baltic fishery. The system consists of 10 pairs of hydrophones, measuring microprocessor device and notebook computer. The high frequency short pulse excitation combined with the matched digital filtering make it possible to obtain high resolution of measure data. Additionally the thermistors mounted in the hydrophones are used to calculate the local sound velocity and enable precision calibration of obtained measuring data. The construction solutions, the measuring procedure and examples of obtained data are presented below.

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© Polish Acoustical Society - Gdansk Department, Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported. (CC BY-NC-SA 3.0)