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An Experimental Study on Compensation Algorithm for Localization using Modified Bilateration Technique and Pyroelectric Sensor in a Ship

변형 이변측위기법과 초전센서를 이용한 선내 위치인식 보정 알고리즘에 관한 실험적 연구

  • Seong, Ju-Hyeon (Graduate school of National Korea Maritime University) ;
  • Choi, Jae-Hyuk (Division of Marine System Engineering, National Korea Maritime University) ;
  • Kim, Jong-Su (Division of Marine System Engineering, National Korea Maritime University) ;
  • Seo, Dong-Hoan (Division of Electrical and Electronics Engineering, National Korea Maritime University)
  • 성주현 (한국해양대학교 전기전자공학과) ;
  • 최재혁 (한국해양대학교 기관시스템공학부) ;
  • 김종수 (한국해양대학교 기관시스템공학부) ;
  • 서동환 (한국해양대학교 전기전자공학부)
  • Received : 2012.08.27
  • Accepted : 2012.10.26
  • Published : 2012.10.31

Abstract

The real-time indoor location technology using radio waves has been studied in a variety of environments. One of them, a ship which consists of steel structure has high reception rate but causes significant ranging error due to the reflection of radio waves. In order to reduce location measurement errors that occurs in such a environment, this paper, based on CSS of IEEE 802.15.4a, presents compensation algorithm for localization using modified bilateration and pyroelectric sensor in a ship. The proposed system reduces the number of fixed nodes by estimating the appropriate reception distance between mobile node and fixed node through the analysis of CSS characteristic in a narrow passage such as ship corridors. Also, in the corner section which the ranging errors are significantly fluctuated due to the reflection and diffraction of radio waves, we recognize the location by tracking the a moving section using modified bilateration technique and pyroelectric sensor. The experimental results show that the location accuracy and efficiency of the proposed algorithm are improved 86.2 % compared to general method.

전파를 이용한 실내 위치인식 기술은 현재 다양한 환경에서 연구되고 있다. 그 중 철골구조로 이루어진 선박은 전파의 반사에 의해 수신율은 높지만 레인징 오차가 크게 발생한다. 이러한 환경에서 발생하는 위치측정 오차를 줄이기 위하여 본 연구에서는 IEEE 802.15.4a의 CSS 기반으로 변형 이변측위와 초전센서를 이용한 선내 위치인식보정 알고리즘을 제안한다. 제안한 시스템은 선내 복도와 같은 좁은 통로에서 CSS의 특성분석을 통하여 이동노드와 고정노드 사이의 적합한 수신거리를 추정하여 고정노드의 수를 줄이고 또한 전파의 반사와 회절에 의한 레인징 오차가 크게 변동하는 코너영역에서 제안한 변형 이변측위기법과 초전센서를 이용하여 이동구간을 추적하여 위치를 인식하였다. 실험결과 제안한 알고리즘이 일반적인 방법 대비 86.2 %의 선내 위치인식 정확도와 효율이 향상됨을 확인하였다.

Keywords

References

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