High accuracy hydroacoustic system to study codend model parameters

• Autorzy: Marszal J. , Schmidt J. , Jedel A. , Schmidt A. , Wojan Z. , Zachariasz K. , Leśniak W.
• Języki publikacji: EN

Abstrakty

EN

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.

Słowa kluczowe

EN

codend model; hydroacoustic system; fishing gear

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2008
• Tom: Vol. 11
• Strony: 271--278
• Opis fizyczny: Bibliogr. 6 poz/, rys., tab.

Twórcy

autor

Marszal J.

autor

Schmidt J.

autor

Jedel A.

autor

Schmidt A.

autor

Wojan Z.

autor

Zachariasz K.

autor

Leśniak W.

• Gdansk University of Technology, Faculty of Electronics Telecommunications and Informatics, Department of Marine Electronic Systems,

Bibliografia

• 1. W. Thiele, "FAO approach to the problems of responsible and sustainable fisheries", Proc. of the International Symposium on Responsible Fisheries & Fishing Techniques, Ińsko - Poland, 45-50, 1999.
• 2. W. Ziora, "Common fishery policy", Proc. of the International Symposium on Responsible Fisheries & Fishing Techniques, Ińsko - Poland, Ińsko - Poland, 65-68, 1999.
• 3. J. Świnarski, P. Nowakowski, H. Sendłak, "Forty years of model fishing gear research in the department of fishing technique", Proc. of the International Symposium on Responsible Fisheries & Fishing Techniques, Ińsko - Poland, 19-30, 1999.
• 4. J. Świnarski, P. Nowakowski, H. Sendłak, J. Marszal, L. Kilian, "A multisensor system to study trawl models", Proc XI Symp. on Hydroacoustics, Jurata - Poland, 291-298, 1994.
• 5. V. Oppenheim, A. S. Willsky, S. Hamid, "Signals and systems", Prentice Hall, 2 edition, 1996.
• 6. W. Marczak, "Water as a standard in the measurements of speed of sound in liquids", J. Acoust. Soc. Am. 102(5) 1065-1068, 1997.