Development of vibration detection system using a fiber-ring laser incorporated with an FBG

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420745
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Composite materials/Surface and interface engineering
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: TSUDA HIROSHI 国立研究開発法人産業技術総合研究所, 分析計測標準研究部門, 総括研究主幹 (30262108)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 光ファイバセンサ / 振動計測 / 構造物健全性評価

Outline of Final Research Achievements

The present study investigated what influenced on the vibration detect-ability of a fiber-ring laser system incorporated with an FBG as the sensor. Furthermore, the applicability of the measurement system to structural health monitoring was investigated. The study revealed as follows. The system emitted a single-mode laser stably regardless of the grating length of the FBG sensor. The vibration detect-ability of the system declined with the optical fiber length between the FBG and the ring laser. The system was applied to impact load detection of a wind turbine blade and the FBG sensor could detect impact load more sensibly than conventional electric microphones.

Free Research Field

非破壊検査