수산해양기술연구 (Journal of the Korean Society of Fisheries and Ocean Technology)
- 제23권4호
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- Pages.189-197
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- 1987
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- 2671-9940(pISSN)
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- 2671-9924(eISSN)
Parametric 음원의 어탐이용에 관한 고찰
Application of Parametric Acoustic Source to Fish Finding
- Lee, Un-Hui (National Fisheries University of Pusan) ;
- Jang, Ji-Won (National Fisheries University of Pusan)
- 발행 : 1987.12.01
초록
Parametric 음원을 어탐에 응용하기 위한 기초연구로써 본 실험에서는 parametric 음원의 특성을 조사하고 이 음원으로 어체에 대한 표적 강도를 측정하여 그 결과를 200KHz의 단일주파수 음원으로 측정한 결과와 비교.검토하였다. 그 결과를 요약하면 다음과 같다. 1. 200KHz인 단일주파수로 구동할 때의 지향각은 5.0
As the basic research for the application of a parametric acoustic source to fish finding, the characteristics of beam patterns and parametric gains of the acoustic source were investigated and target strengths of fish, grey mullet, with the acoustic source were measured. The mean primary frequency of the acoustic source was 200KHz and the produced sounds by difference-frequencies were 5KHz, 10KHz, 16KHz and 20KHz. For measurement of target strength in yaw (coronal) plane of fish the to be target was 34cm in length, the pulse duration of the source was 0.3m/sec and the difference frequency was 10KHz in consideration of the length of fish and of parametric gain of the acoustic source. The results obtained are as follow: 1. Beam widths(down 3 dB) of the parametric acoustic source excited at frequencies of 5KHz, 10KHz, 16KHz, and 20KHz were 4.3
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