A Study on Detection of Underwater Ferromagnetic Target for Harbor Surveillance

Kim, Minho; Joo, Unggul; Lim, Changsum; Yoon, Sanggi; Moon, Sangtaeck

doi:2015.18.4.350

J. KIMS Technol > Volume 18(4); 2015 > Article

Journal of the Korea Institute of Military Science and Technology 2015;18(4):350-357.
DOI: https://doi.org/10.9766/KIMST.2015.18.4.350

A Study on Detection of Underwater Ferromagnetic Target for Harbor Surveillance

Minho Kim, Unggul Joo, Changsum Lim, Sanggi Yoon, Sangtaeck Moon

Maritime Research and Development Lab, LIGNex1 Co., Ltd.

항만 감시를 위한 수중 강자성 표적 탐지에 관한 연구

김민호, 주웅걸, 임창선, 윤상기, 문상택

LIG넥스원(주) Maritime연구소

Abstract

Many countries have been developing and operating an underwater surveillance system in order to protect their oceanic environment from infiltrating hostile marine forces which intend to lay mines, conduct reconnaissance and destroy friendly ships anchored at the harbor. One of the most efficient methods to detect unidentified submarine approaching harbor is sensing variation of magnetism of target by magnetic sensors. This measurement system has an advantage of high possibility of detection and low probability of false alarm, compared to acoustic sensors, although it has relatively decreased detection range. The contents of this paper mainly cover the analysis of possible effectiveness of magnetic sensors. First of all, environmental characteristics of surveillance area and magnetic information of simulated targets has been analyzed. Subsequently, a signal processing method of separating target from geomagnetic field and methods of estimating target location has been proposed.

Key Words: Ferromagnetic Target, Harbor Surveillance, Detection, Exponential Moving Average