統計的応答変化判定法を用いた実機構造の損傷・異常診断 : 道路トンネル用ジェットファンの損傷診断(<小特集>高精度な新非破壊検査技術)

概要

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Structural health monitoring is an important technology for aging aerospace and civil structures. For this structural health monitoring, fiber optic sensors are increasing in popularity, however, several kinds of sensors are usually required, including sensors other than fiber optic sensors. Thus, a new technology for transforming conventional sensors into distributed sensors is required. The present study proposes Ethernet LAN technologies for the sensor integration required for structural health monitoring, and discusses the advantages of adopting this technology. Moreover, the paper describes an Ethernet-based health monitoring system and a statistical unspervised damage detecting method for automatic damage diagnosis. Then, we crease a system to monitor the damage to an expressway tunnel jet-fan using system identification and statistical tools. Damage was detected from changes in a set of data measuring loads on the turnbuckles of the jet-fan. The resulting automatic diagnosis of damage to the jet-fan was successful.
社団法人日本機械学会の論文
2006-12-25