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

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

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 longgauge 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.

Michiko Nishiyama | Hirotaka Igawa | Naoyuki Watanabe | Tokio Kasai

[1] Keiichi Inoue,et al. Delayed transmission/reflection ratiometric reflectometry , 2009, International Conference on Optical Fibre Sensors.

[2] I. Yamaguchi,et al. Distributed Measurements with a Long Gauge FBG Sensor Using Optical Frequency Domain Reflectometry , 2008 .

[3] M. Giordano,et al. Experimental modal analysis of an aircraft model wing by embedded fiber Bragg grating sensors , 2006, IEEE Sensors Journal.

[4] Hao Jiang,et al. Real-Time Estimation of Time-Varying Bending Modes Using Fiber Bragg Grating Sensor Arrays , 2013 .

[5] Jae-Hung Han,et al. Shape estimation with distributed fiber Bragg grating sensors for rotating structures , 2011 .

[6] Christian Boller,et al. Health Monitoring of Aerospace Structures , 2003 .