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

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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Indoor Positioning System Using Ultrasonic and RF

초음파와 RF를 이용한 실내 측위 시스템

  • Received : 2016.10.06
  • Accepted : 2017.01.24
  • Published : 2017.02.28
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Abstract

In this paper, we propose a ultrasonic and RF-based indoor localization system. In previous work, various systems were proposed for indoor localization, but they have limitation in applicability due to time-synchronization, complexity, or accuracy. To overcome such problems, an indoor localization system with ultrasonic and RF is proposed. A transmitting system is composed of a pair of ultrasonic and RF transmitters and the receiving system is composed of multiple ultrasonic receivers and one RF receiver. The theoretical performance limitation is also analyzed. To verify localization performance, we have implemented a receiving systems and a transmitting system using Arduino modules. Experiments were performed in $2m{\times}2m{\times}2m$ space and the localization errors had a mean of 6.1cm and a standard deviation of 1.6cm.

본 논문은 실내에서 위치를 측정하기 위해 초음파와 RF 기반의 실내 측위 시스템을 제안한다. 기존의 실내 측위 방안은 시간 동기화, 시스템의 복잡도, 측위의 정확성 등의 문제가 있다. 이러한 문제를 해결하기 위해 초음파와 무선주파수(RF)를 이용한 송수신 시스템을 제안한다. 송신시스템은 한 쌍의 초음파 송신기와 RF 송신기로 구성하고, 수신시스템은 복수의 초음파 수신기들과 하나의 RF 수신기로 구성한다. 또한, 제안된 시스템이 가질 수 있는 성능의 한계를 수학적으로 분석하였다. 제안된 시스템은 시뮬레이션뿐만 아니라 아두이노 모듈을 이용하여 실제 시스템을 제작하여 측위 성능을 평가하였다. 실내 공간 $2m{\times}2m{\times}2m$에서 25개 지점의 위치를 측정한 결과, 평균 6.1cm, 표준편차 1.6cm의 성능을 보였다.

Keywords

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