한국전산구조공학회:학술대회논문집 (Proceedings of the Computational Structural Engineering Institute Conference)
- 한국전산구조공학회 2011년도 정기 학술대회
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- Pages.36-39
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- 2011
볼트 연결부 모니터링을 위한 다채널 무선 임피런스 센서노트와 EMI 인터페이스의 성능 분석
Performance evaluation of EMI interface and multi-channel wireless impedance sensor node for bolted connection monitoring
- 발행 : 2011.04.14
초록
In this paper, performance of EMI interface and multi-channel wireless impedance sensor node is evaluated for SHM on bolted connection. To achieve the objective, following approaches are implemented. Firstly, an interface washer is designed to monitor loosened bolt through the variation in EMI of interface washer due to change in preload in bolt. Secondly, a multi-channel wireless impedance sensor node based on Imote2 platform is designed for automated and cost-efficient impedance-based SHM on bolted connections. Finally, performance of the multi-channel wireless impedance sensor node and the interface washer are experimentally validated for a lab-scale bolted connection model. A damage monitoring method using RMSD index of EMI signatures is utilized to examine the strength of each individual bolted connection.