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2023 Vol.33, Issue 6 Preview Page

Research Article

Application of Eddy Current Sensor for Measurement of TBM Disc Cutter Wear

TBM 디스크커터의 마모량 측정을 위한 와전류센서의 적용 연구

Min-Sung Park1
,
Min-Seok Ju1
,
Jung-Joo Kim2
,
Hoyoung Jeong3*
박 민성1
,
주 민석1
,
김 정주2
,
정 호영3*
1Master Course, Department of Energy Resources Engineering, Pukyong National University
2Senior Researcher, Transmission & Substation Laboratory, KEPCO Research Institute, KEPCO
3Assistant Professor, Department of Energy Resources Engineering, Pukyong National University
1부경대학교 에너지자원공학과 석사과정
2한국전력공사 전력연구원 송변전연구소 선임연구원
3부경대학교 에너지자원공학과 조교수
*Corresponding Author
31 December 2023. pp. 534-546
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Abstract

If the disc cutter is excessively worn or damaged, it becomes incapable of rotating and efficiently cutting rockmass. Therefore, it is important to appropriately manage the replacement cycle of the disc cutter based on its degree of wear. In general, the replacement cycle is determined based on the results of manual inspection. However, the manual measurements has issues related to worker safety and may lead to inaccurate measurement results. For these reasons, some foreign countries are developing the real-time measurement system of disc cutter wear by using different sensors. The ultrasonic sensors, eddy current sensors, magnetic sensors, and others are utilized for measuring the wear amount of disc cutters. In this study, the applicability of eddy current sensors for real-time measurement of wear amount in TBM disc cutters was evaluated. The distance measurement accuracy of the eddy current sensor was assessed through laboratory tests. In particular, the accuracy of eddy-current sensor was evaluated in various environmental conditions within the cutterhead chamber. In addition, the measurement accuracy of the eddy current sensor was validated using a 17-inch disc cutter.

Keywords
Cutter wear
Eddy-current sensor
Disc cutter
TBM

디스크 커터는 과다하게 마모되거나 손상되는 경우 회전이 불가능하거나 효율적으로 암석을 절삭하는 것이 불가능하다. 따라서 디스크 커터의 마모정도에 따라 교체주기를 적절하게 관리하는 것이 매우 중요하다. 일반적으로 디스크 커터의 교체주기를 결정하기 위해서 인력에 의한 정기적인 계측을 수행한다. 이러한 인력에 의한 디스크 커터의 계측은 작업자의 안전과 관련한 이슈가 있고, 부정확한 계측결과를 가져올 수도 있다. 이러한 이유로 해외에서는 디스크 커터의 마모정도를 센서를 통해 실시간으로 측정하기 위한 기술의 개발이 이루어지고 있으며, 디스크 커터의 마모량 계측에는 초음파 센서, 와전류 센서, 자기 센서 등이 활용된다. 본 연구에서는 TBM 디스크 커터의 마모량을 실시간으로 계측하기 위한 와전류 센서의 적용성을 평가하였다. 와전류 센서의 거리 계측정확도를 실험실 모사시험을 통해 평가하였고, 특히 디스크 커터가 노출될 수 있는 챔버 내 여러 환경조건에서의 계측정확도를 비교하였다. 최종적으로는 17인치 디스크 커터를 활용하여 와전류 센서의 계측 정확도를 검증하였다.

키워드
커터 마모
와전류 센서
디스크 커터
TBM
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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 :6
  • Pages :534-546
  • Received Date : 2023-12-05
  • Revised Date : 2023-12-18
  • Accepted Date : 2023-12-18
  • DOI :https://doi.org/10.7474/TUS.2023.33.6.534
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