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크기가 다른 7개의 탄화 텅스텐 구를 이용한 Chirp 소너 시스템의 교정Calibration of a Chirp Sonar System Using Seven Tungsten Carbide Spheres of Different Sizes

Other Titles
Calibration of a Chirp Sonar System Using Seven Tungsten Carbide Spheres of Different Sizes
Authors
이대재이경훈정봉규강희원
Issue Date
2022
Publisher
한국수산과학회
Keywords
Acoustic calibration; Broadband echo sounder; Specular wave; Tungsten-carbide spheres; Chirp transducer
Citation
한국수산과학회지, v.55, no.2, pp 207 - 217
Pages
11
Indexed
KCI
Journal Title
한국수산과학회지
Volume
55
Number
2
Start Page
207
End Page
217
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/2318
DOI
10.5657/KFAS.2022.0207
ISSN
0374-8111
Abstract
The accurate calibration of broadband echo sounders is essential for providing high quality acoustic information for fisheries applications. The increased range resolution of broadband echo sounder systems improves the detection and characterization of targets near boundaries, such as fish near the seabed. Most echo sounder systems are calibrated using tungsten-carbide (WC) spheres. For accurate calibration, it is necessary to select WC spheres of optimized diameters used frequently to calibrate echo sounder systems. For these purposes, the measured and simulated target strength (TS) data for seven WC spheres of different sizes were compared across a bandwidth of 100–200 kHz. The frequency-dependent TS pattern for the specular wave measured from two WC spheres using the fractional Fourier transform was also estimated and analyzed. Comparative results are presented for all the spheres and the best average precision of 0.15 dB was obtained for the 22 mm WC sphere.
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해양과학대학 > Department of Maritime Police and Production System > Journal Articles

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해양과학대학 (해양경찰시스템학과)
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