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http://dx.doi.org/10.5657/KFAS.2021.0798

Performance Characteristics of a 50-kHz Split-beam Data Acquisition and Processing System  

Lee, Dae-Jae (Division of Marine Production System Management, Pukyong National University)
Publication Information
Korean Journal of Fisheries and Aquatic Sciences / v.54, no.5, 2021 , pp. 798-807 More about this Journal
Abstract
The directivity characteristics of acoustic transducers for conventional single-beam echo sounders considerably limit the detection of fish-size information in acoustic field surveys. To overcome this limitation, using the split-aperture technique to estimate the direction of arrival of single-echo signals from individual fish distributed within the sound beam represents the most reliable method for fish-size classification. For this purpose, we design and develop a split-beam data acquisition and processing system to obtain fish-size information in conjunction with a 50-kHz single-beam echo sounder. This split-beam data acquisition and processing system consists of a notebook PC, a field-programmable gate array board, an external single-transmitter module with a matching network, and four-channel receiver modules operating at a frequency of 50-kHz. The functionality of the developed split-beam data processor is tested and evaluated. Acoustic measurements in an experimental water tank showed that the developed data acquisition and processing system can be used as a fish-sizing echo sounder to estimate the size distribution of individual fish, although an external single-transmitter module with a matching network is required.
Keywords
Split-beam processor; Data acquisition and processing system; Direction of arrival (DOA); PC-based echo-sounder system; Fish size estimation;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Airmar Technology Corporation. 2013. Technical data catalog. Milford, NH, U.S.A., 274-325.
2 Burdic W. 1991. Underwater acoustic system analysis. Prentice Hall, Hoboken, NJ, U.S.A., 327-332.
3 Digilent. 2011. Digilent nexys2 board reference manual. Digilent Inc., Pullman, WA, U.S.A., 1-17.
4 Fuji Ceramics Corporation. 2018. Guide for using a piezoelectric elements. Fujinomiya-shi, Japan, 1-28.
5 Lee DJ and Shin HI. 2001. Development of a split beam transducer for measuring fish size distribution. Bull Korean Soc Fish Tech 37, 196-213.
6 Lee DJ, Kang HY and Pak YY. 2016. Time-frequency feature extraction of broadband echo signals from individual live fish for species identification. Korean J Fish Aquat Sci 49, 214-223. https://doi.org/10.5657/KFAS.2016.0214.   DOI
7 Levanon N. 1988. Radar principles. John Wiley and Sons, New York, NY, U.S.A., 285-297.
8 Mahafza BR. 1998. Introduction to radar analysis. CRC Press, Boca Raton, FL, U.S.A., 251-254.
9 Shui PL, Shang HY and Zhao YB. 2007. Instantaneous frequency estimation based on directionally smoothed pseudo-Wegner-Ville distribution bank. IET Radar Sonar Navig 1, 317-325. https://doi.org/10.1049/iet-rsn:20060123.   DOI
10 Lee DJ. 2018. Performance characteristics of chirp data acquisition and processing system for the time-frequency analysis of broadband acoustic scattering signals from fish schools. Korean J Fish Aquat Sci 51, 178-186. https://doi.org/10.5657/KFAS.2018.0178.   DOI
11 Lee DJ. 2011. Estimation of angular location and directivity compensation of split-beam acoustic transducer for a 50 kHz fish sizing echo sounder. Korean J Fish Aquat Sci 44, 423-430. https://doi.org/10.5657/KFAS.2011.0423.   DOI
12 Lee DJ. 2015. Time-frequency analysis of broadband acoustic scattering from chub mackerel Scomber japonicas, goldeye rockfish Sebestes thompsoni, and fat greenling Hexagrammos otakii. Korean J Fish Aquat Sci 48, 221-232. https://doi.org/10.5657/KFAS.2015.0221.   DOI
13 Imberger J and Boashash B. 1986. Application of the WignerVille distribution to temperature gradient microstructure: A new technique to study small-scale variations. J Physic Oceanogr 16, 1997-2012. https://doi.org/10.1175/1520-0485(1986)016<1997:AOTWDT>2.0.CO;2.   DOI
14 Lee DJ and Lee WS. 2011. Development of split-beam acoustic transducer for a 50 kHz fish sizing echo sounder. Korean J Fish Aquat Sci 44, 413-422. https://doi.org/10.5657/KFAS.2011.0413.   DOI