Spatial Information Research

Korea Spatial Information Society (대한공간정보학회)
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Development and Evaluation of a System to Determine Position and Attitudes using In-Vehivle Seonsors

차량 내부 센서를 이용한 위치·자세 결정 시스템 구축 및 평가

  • Received : 2013.10.29
  • Accepted : 2013.12.30
  • Published : 2013.12.31
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Abstract

GPS based car navigation systems show significant problems in such environment as a tunnel, a road surrounded by high buildings. In this study, we thus propose a method to determine positions and attitudes using only in-vehicle sensory data without a GPS. To check the feasibility of this method, we constructed a system to acquire in-vehicle sensory data and reference data simultaneously. We acquired test data using this system, estimated the trajectory based on the proposed method and evaluated the accuracy of both the sensory data and the trajectory. The speed and angular velocities provided by the in-vehicle sensors include 1.1 km/h and 0.8 deg/s RMS errors, respectively. The estimated trajectory using these data shows 20.8 m RMS errors for a 15 minute drive. In future, if we further combine additional sensors such as a camera and a GPS, we can achieve a high accurate navigation system at a low cost without an expensive high-grade external IMU.

GPS 기반 차량 내비게이션은 신호 수신이 어려운 터널과 빌딩 숲 같은 곳에서 위치 정확도가 현저히 떨어진다. 이에 본 연구는 GPS 없이 차량의 내부 센서 데이터만을 이용하여 위치 자세를 결정하는 방법을 제안한다. 제안한 방법의 실현 가능성 확인하기 위하여 내부 센서 데이터와 기준 데이터를 동시에 취득할 수 있는 시스템을 구축하였다. 취득된 데이터와 이를 이용하여 제안된 방법으로 추정한 경로에 대한 정확도 평가를 수행하였다. 내부센서로 측정된 속력과 각속도는 각각 1.1 km/h와 0.8 deg/s정도의 RMS 오차를 보였고, 이를 이용하여 추정한 경로는 약 15분 정도 주행했을 때 20.8 m의 RMS 오차를 보였다. 향후 카메라와 GPS 등의 추가센서와 융합하면, 고가의 고정밀 외부 IMU가 없어도 높은 정확도의 저가 내비게이션으로 활용될 수 있을 것으로 판단된다.

Keywords

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Cited by

  1. 차량 내장 센서와 단영상 후방 교차법을 이용한 차량 위치 결정 알고리즘 개발 및 성능 평가 vol.25, pp.2, 2013, https://doi.org/10.7319/kogsis.2017.25.2.021