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Title |
Development of Smart Wireless Measurement System for Monitoring of Bridges
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Authors |
허광희 ; 이우상 ; 이진옥 ; 전준용 ; 손동진 |
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Keywords |
모니터링 ; 스마트 무선 센서 시스템 ; MEMS 센서 ; 블루투스 통신 ; NExT & ERA ; Monitoring ; Wireless sensor system ; MEMS sensor ; Bluetooth communication ; NExT & ERA |
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Abstract |
In this paper, a research was performed to develop a wireless measurement system for bridge monitoring using MEMS sensor and bluetooth wireless communication module. First, in order to prove the suitability of MEMS sensor for the bridge measurement, its ranges of measuring acceleration and of frequency response were experimented. Also, the quality of wireless communication was tested by an experiment on long-distance communication for the knowledge of maximum communication distance, and also by an experiment on the data transmit-receive capability both inside and outside of a steel box bridge. Later, placing the wireless acceleration sensor system that had been developed in our lab on a bridge in public service, we acquired vibration data from the bridge under traffic load and analyzed its dynamic characteristics in realtime. For the analysis of the data, NExT & ERA algorithm were employed. The result of analysis was compared to the FE analysis of the same bridge, and the comparison made it possible to evaluate the performance of wireless acceleration sensor system. As a result, it was proven that the wireless acceleration sensor system developed with the use of MEMS sensor and bluetooth wireless communication module could be effectively applied to the measurement of structure whose vibration feature was low frequency like a bridge.
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