Journal of Korean Tunnelling and Underground Space Association (한국터널지하공간학회 논문집)

Korean Tunnelling and Underground Space Association (한국터널지하공간학회)
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Improvement of RTL system for location monitoring of multi-laborers in the underground space

지하공간에서 노무자의 위치 인식을 위한 RTL 시스템 개선

  • Received : 2016.05.18
  • Accepted : 2016.05.30
  • Published : 2016.05.31
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Abstract

Real time location (RTL) system which can control the safety of laborers in the underground space is developed in this study. This innovative system can monitor the location and history of movement of multiple laborers in real time. To accommodate constrains of the underground space, the system is portable and composed with low-battery mode. Since conventional method to detect the location of laborer with radio signal strength indicator (RSSI) contains high errors, new measurement system using accelerometers and correction method are suggested in this study. Field test is performed to validate the developed system. The error for moving laborer was 0.4 m and for non-moving laborers was 0.2 m. Thus, it is found that the new RTL system can be used to monitor the location of laborers in the underground construction space.

본 연구에서는 터널 및 지하건설현장에서 노무자의 안전을 관리할 수 있는 실시간 위치정보 시스템을 개발하였다. 이 시스템은 다수의 노무자들에 대한 실시간 위치 탐색 및 이동 이력을 확인할 수 있다. 이 시스템은 지하공간에서 다양한 노무자들의 이동 특성을 손쉽게 파악하기 위하여 저전력의 이동이 용이한 시스템으로 구성하였다. RSSI를 이용한 삼각측량으로 위치 인식을 하는 과거의 방법은 매우 큰 오차를 가지는 이유로 가속도계를 이용한 새로운 거리측정 방법 및 보정 방안을 제시하였다. 지하건설현장에서 개발한 시스템을 평가한 결과 움직임이 없는 경우 약 0.2 m 오차를 나타내었고, 움직임이 있는 경우 약 0.4 m의 오차가 발생하였으며, 현장에서 충분히 활용할 만한 결과를 나타내었다.

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References

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