Examining the Influence of TBM Chamber Condition and Transmission Distance on the Received Strength of Bluetooth Low Energy Signals: A Laboratory Simulation Experiment

Yosoon Choi; Hoyoung Jeong; Jeongju Kim

doi:10.7474/TUS.2023.33.5.425

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2023 Vol.33, Issue 5 Preview Page

Original Article

Examining the Influence of TBM Chamber Condition and Transmission Distance on the Received Strength of Bluetooth Low Energy Signals: A Laboratory Simulation Experiment TBM 챔버 상태와 전송 거리에 따른 저전력 블루투스 신호의 수신 강도 분석: 실험실 모사 실험

31 October 2023. pp. 425-434

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Abstract

To measure the wear amount of the TBM disk cutter in real time, it is important not only to automate the measurement using sensors, but also to stably transmit the measured data to the information processing system. In this study, we investigated the viability of utilizing Bluetooth Low Energy (BLE) technology to wirelessly transmit sensor data from the TBM cutter head to a receiver located at the chamber's rear. Through laboratory experiments, we analyzed the Received Signal Strength Index (RSSI) of the receiver considering various signal strength of the transmitter, separation distances between the transmitter and receiver and chamber fill materials. Our results demonstrate that wireless data transmission is feasible across all tested conditions when the transmitter signal strength is 0 dBm or higher.

Keywords

TBM

Disc cutter

Wear monitoring

Wireless communication

Bluetooth Low Energy

TBM 디스크 커터의 마모량을 실시간 계측하기 위해서는 센서를 이용해 계측을 자동화하는 것뿐만 아니라, 계측된 데이터를 후방의 정보처리시스템에 안정적으로 전송하는 것도 중요하다. 본 연구에서는 TBM 커터헤드에 설치된 센서로부터 챔버 후방에 설치된 수신기로 데이터를 무선 전송할 때 저전력 블루투스(Bluetooth Low Energy, BLE) 기술의 활용 가능성을 검토하였다. 실험실 모사 실험을 통해 송신기의 신호강도, 송신기와 수신기 사이의 거리, 챔버 공간에 채워진 물질의 종류에 따라 변화하는 수신기의 신호 수신 강도(Received Signal Strength Index, RSSI)의 특성을 분석하였다. 송신기의 신호강도를 0 dBm 이상으로 설정하면 실험에서 고려한 모든 이격거리 조건과 챔버의 상태 조건에서 데이터를 무선전송할 수 있었다.

키워드

TBM

디스크 커터

마모량 계측

무선통신

저전력 블루투스

References

Baek, J., Suh, J., and Choi, Y., 2018, Analysis of Received Signal Strength Index from Bluetooth Beacons to Develop Proximity Warning Systems for Underground Mines, Journal of the Korean Society of Mineral and Energy Resources Engineers, 55(6), 604-613. 10.32390/ksmer.2018.55.6.604

Edelmann, T., 2013, Monitoring of cutting tools in TBM's, In: 2013 Tunneling research in Leoben (Schwanau and Bochum Workshop).

Gong, Q., Wu, F., Wang, D., Qiu, H., and Yin, L., 2021, Development and Application of Cutterhead Working Status Monitoring System for Shield TBM Tunnelling, Rock Mechanics and Rock Engineering, 54, 1731-1753. 10.1007/s00603-021-02380-8

Guo, J., Wang, Y., Liu, J., and Niu, J., 2013, The Research and Design of A New Shield Cutter Wear Detection System, Advanced Materials Research, 711, 381-384. 10.4028/www.scientific.net/AMR.711.381

Hyunseung, 2023, https://nowwin.co.kr/product/%EB%B9%84%EC%BD%98-ibeacon-%EB%B8%94%EB%A3%A8%ED%88%AC%EC%8A%A4-beacon-i3/54/

Jung, J., Baek, J., and Choi, Y., 2016, Analysis of Features and Applications of Bluetooth Beacon Technology for Utilization in the Mining and Construction Industries, Tunnel & Underground Space, 26(3), 478-490. 10.7474/TUS.2016.26.3.143

Lan, H., Xia, Y., Ji, Z., Fu, J., and Miao, B., 2019, Online monitoring device of disc cutter wear - Design and field test, Tunnelling and Underground Space Technology, 89, 284-294. 10.1016/j.tust.2019.04.010

Park, M.S., Ju, M.S., Cho, M.S., Kim, J.J., and Jeong, H., 2022, Introduction to Research Trend of Real-Time Measurement for Wear of TBM Disc Cutter, Tunnel & Underground Space, 32(6), 478-490.

Wang, F., Men, C.H., Kong, X.W., and Meng, L.X., 2019, Optimum design and application research of eddy current sensor for measurement of TBM disc cutter wear, Sensors, 19, 4230. 10.3390/s1919423031569462PMC6806206

Information

Publisher :Korean Society for Rock Mechanics and Rock Engineering
Publisher(Ko) :한국암반공학회
Journal Title :Tunnel and Underground Space
Journal Title(Ko) :터널과 지하공간
Volume : 33
No :5
Pages :425-434
Received Date : 2023-10-04
Revised Date : 2023-10-18
Accepted Date : 2023-10-23
DOI :https://doi.org/10.7474/TUS.2023.33.5.425

Tunnel and Underground SpaceISSN:1225-1275(Print) 2287-1748(Online)한국암반공학회

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