The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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System Design for Location Determination Inside the Ship

선박 내부 위치 측위를 위한 시스템 설계

  • 박진관 (목포대학교 컴퓨터공학과) ;
  • 정민아 (목포대학교 컴퓨터공학과) ;
  • 윤석호 (목포대학교 정보전자공학과) ;
  • 이성로 (목포대학교 정보전자공학과)
  • Received : 2013.01.14
  • Accepted : 2013.02.19
  • Published : 2013.02.28
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Abstract

In this paper, we present a system design for location determination inside the ship. Since the GPS signal can not be received in the interior of the large vessel, we use the vessel wireless AP (Access Point) RSSI (received signal strength indication) to accurately measure the position. We convert the RSSI for the 3 AP's into distance through the Friis formula and get the location through triangulation. The signal strength varies irregularly due to noise making it difficult to obtain the exact location. Thus Kalman filter is used to real-time position correction, that is store in a server database.

본 논문은 GPS 신호를 수신할 수 없는 대형선박의 내부에서 현재 위치를 정확하게 측정하기 위해서, GPS 신호를 대신하여 선박내부에 설치되어 있는 Wireless AP (Access Point)에서 발신되는 RSSI (Received signal strength indication)를 이용하였다. 선박내부에서 수신되는 RSSI 신호 중 신호세기가 가장 강한 3곳의 AP에서 발신되는 RSSI를 Friis 공식을 통해 거리로 환산 후, 삼각측량법을 통해 위치로 변환하였다. 그리고 AP에서 발신되는 신호에는 노이즈가 발생되기 때문에 신호세기가 불규칙하게 변함으로써 정확한 위치를 얻기 힘들다. 그래서 칼만필터를 통해 실시간으로 위치를 보정하고, 보정된 위치는 서버 DB에 저장된다.

Keywords

References

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