Long-gauge FBGs interrogated by DTR3 for dynamic distributed strain measurement of helicopter blade model

被引：0
|
作者：
Nishiyama, M. [1 ]
Igawa, H. [1 ]
Kasai, T. [1 ]
Watanabe, N. [2 ]
机构：
[1] Japan Aerosp Explorat Agcy, Inst Aeronaut Technol, 6-13-1 Osawa, Mitaka, Tokyo 1810015, Japan
[2] Tokyo Metropolitan Univ, Dept Aerosp Eng, Hino, Tokyo 1910065, Japan
来源：
23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2014年 / 9157卷
关键词：
structural health monitoring; deformation; helicopter blade; DTR3; fiber Bragg grating;
D O I：
10.1117/12.2059452
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we describe characteristics of distributed strain sensing based on a Delayed Transmission/Reflection Ratiometric Reflectometry (DTR3) scheme with a long-gauge Fiber Bragg Grating (FBG), which is attractive to dynamic structural deformation monitoring such as a helicopter blade and an airplane wing. The DTR3 interrogator using the long-gauge FBG has capability of detecting distributed strain with 50 cm spatial resolution in 100 Hz sampling rate. We evaluated distributed strain sensing characteristics of the long-gauge FBG attached on a 5.5 m helicopter blade model in static tests and free vibration dynamic tests.
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页数：4
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