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Analysis of Received Signal Strength Index from Bluetooth Beacons to Develop Proximity Warning Systems for Underground Mines

지하광산용 근접경고시스템 개발을 위한 블루투스 비콘 신호의 수신 강도 분석

  • 백지은 (부경대학교 에너지자원공학과) ;
  • 서장원 (강원대학교 에너지공학부 (에너지자원융합공학전공)) ;
  • 최요순 (부경대학교 에너지자원공학과)
  • Received : 2018.12.04
  • Accepted : 2018.12.20
  • Published : 2018.12.31

Abstract

In this study, we analyzed the variations in the received signal strength index (RSSI) measured from Bluetooth beacons based on the strength and propagation direction of Bluetooth low energy (BLE) signal. Using a smartphone, we performed field experiments to investigate RSSI variations in the BLE signal transmitted by non-directional and directional beacons in an amethyst mine. In case of non-directional beacons, as the distance between the Bluetooth beacon and smartphone decreased, the RSSI increases, whereas as the BLE signal strength increased, the RSSI average gradually increased. The mean value of RSSI measured from the directional beacons was changed without relation to the facing angle between the Bluetooth beacon and smartphone. The results of this study can be used as basic data for developing a Bluetooth beacon-based proximity warning system for underground mines.

Acknowledgement

Grant : 광물자원 탐사.개발

Supported by : 산업통상자원부

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