The Journal of the Acoustical Society of Korea (한국음향학회지)

The Acoustical Society of Korea (한국음향학회)
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Seafloor Sediment Classification Using Nakagami Probability Density Function of Acoustic Backscattered Signals

음향후방산란신호의 나카가미 확률밀도함수를 이용한 해저퇴적물 분류

  • 복태훈 (제주대학교 해양과학대학 해양정보시스템공학과) ;
  • 팽동국 (제주대학교 해양과학대학 해양정보시스템공학과) ;
  • 박요섭 (한국해양연구원 해양위성.관측기술연구부) ;
  • 공기수 (한국지질자원연구원 석유해저자원연구부) ;
  • 박수철 (충남대학교 자연과학대학 해양학과)
  • Published : 2009.04.30
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Abstract

The physical properties of a seafloor sediment have been used as a basic data for the ocean survey. Conventional methods such as a coring, a drilling, and a grabbing have been used to explore the physical properties but these methods have a number of shortcomings as it is time consuming, expensive and spatially limited. To overcome these limitations, seafloor sediment classification using acoustic signals has been studied actively. In this paper, we obtained the backscattered signal from the seafloor sediment using an echo sounder which is one kind of seafloor topography equipment. Nakagami probability density function of the backscattered signals from the seafloor sediment was computed and a Nakagami parameter was compared with the physical properties of the seafloor sediment. We have confirmed that Nakagami parameter, m is correlated with the physical properties of a seafloor sediment. This study will be utilized as a basic data of the seafloor sediment research.

해양 탐사에 있어서 해저퇴적물의 물성을 파악하는 것은 해양 연구의 기초 자료로써 활용되고 있다. 이러한 해저퇴적물의 물성을 파악하기 위해서는 시추를 통한 직접적인 방법이 있지만 경제적, 시간적 손실이 크고 공간적인 한계가 있다. 이에 음향 장비를 이용한 해저퇴적물 분류 연구가 활발히 진행 중에 있다. 본 논문에서는 해저 지형 조사 장비의 일종인 음향측심기에 의한 음향 신호의 나카가미(Nakagami) 분포를 분석하여 해저퇴적물의 특성을 분류하는 연구를 수행하였다. 나카가미 변수인 m 값의 변화에 따라 해저퇴적물의 물리적 특성이 달라지는 것을 확인하였고, 이는 해저퇴적물특성 연구의 기초자료로 활용되리라고 여겨진다.

Keywords

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