측면주사음탐기(side scan sonar) 센서는 해저면의 영상을 실시간으로 탐색하는 장비로서 해양탐사 및 지질조사, 해저통신 및 어초조사, 기뢰 및 잠수정 탐색 등 해양탐사와 관련한 대표적 장비라고 할 수 있다. 센서는 해저와 목표물을 표시하기 위해 소나 플랫폼의 움직임을 사용하며, 동작주파수 범위는 20kHz~500kHz이다. 이 주파수는 요구되는 깊이와 목표물의 크기에 의해서 결정된다. 센서는 수직으로 45˚, 수평으로 2˚ 정도의 신호전파 방사각도 폭을 가진다. 최근에는 해양탐사와 개발을 위해 빠른 스캔속도와 정확한 정보, 고해상도의 영상을 얻기 위해 해저면에 대한 다중빔 영상센서의 핵심기술로 활용되면서 그 활용성과 중요성이 점차 증가되고 있다. 본고에서는 측면주사소나 센서의 기본 원리 및 종류,다중빔측면주사소나 기술동향, 응용 분야의 사례를 소개함으로써, 국내 기반기술 및 상용화 개발이 취약한 측면주사 음탐기 센서에 대한 이해를 돕고자 한다.
KSP Keywords
Side Scan Sonar
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