Long-Distance FBG Sensor System Using High-Speed Swept-Wavelength Light Source

2006 ◽  
Author(s):  
Takanori Saitoh ◽  
Kenichi Nakamura ◽  
Yoshifumi Takahashi ◽  
Hiroyuki Iida ◽  
Yoshimitsu Iki ◽  
...  
Keyword(s):  
Light Source ◽  
High Speed ◽  
Sensor System ◽  
Long Distance ◽  
Fbg Sensor ◽  
Wavelength Light

High-speed MEMS swept-wavelength light source for FBG sensor system

2005 ◽  
Author(s):  
Takanori Saitoh ◽  
Kenichi Nakamura ◽  
Yoshifumi Takahashi ◽  
Koichiro Miyagi
Keyword(s):  
Light Source ◽  
High Speed ◽  
Sensor System ◽  
Fbg Sensor ◽  
Wavelength Light

Ultra-long-distance (230 km) FBG sensor system

2008 ◽  
Author(s):  
Takanori Saitoh ◽  
Kenichi Nakamura ◽  
Yoshifumi Takahashi ◽  
Hiroyuki Iida ◽  
Yoshimitsu Iki ◽  
...  
Keyword(s):  
Sensor System ◽  
Long Distance ◽  
Fbg Sensor

Fracture Monitoring of Composite Wind Turbine Blade Using High-Speed Bragg Grating Sensor System

2011 ◽  
Vol 109 ◽  
pp. 79-83 ◽  
Author(s):  
Hyung Joon Bang ◽  
Soo Hyun Kim
Keyword(s):  
Wind Turbine ◽  
Turbine Blade ◽  
High Speed ◽  
Performance Test ◽  
Turbine Blades ◽  
Wind Turbine Blade ◽  
Sensor System ◽  
Bragg Grating ◽  
Fbg Sensor ◽  
Fbg Sensors

This paper introduces a FBG (fiber Bragg grating) based AE (acoustic emission) sensing system for use in health monitoring of composite wind turbine blades. In this study, a multiplexing high speed FBG sensor system was developed with a spectrometer-type demodulator based on a linear photo detector. Pencil break test was performed using an FBG sensor and the results were compared with the results of piezo-based AE sensor. For the performance test of fracture sensing in composite materials, a down-scaled wind turbine blade was fabricated and drop impact tests were performed. Arrayed 4 FBG sensors were installed in the skin of wind turbine blade and impacts of 15 J energy were applied by a drop weight. The frequency characteristics of impact induced AE signals were examined with short-time Fourier transform focused on the leading waves. Finally, the onset of fractures in composite structure was successfully assessed using arrayed FBG sensors.

Long-distance FBG sensor system using fiber ring laser with hybrid amplifier

2005 ◽  
Author(s):  
Peng-Chun Peng ◽  
Kai-Ming Feng ◽  
Wei-Ren Peng ◽  
Hung-Yu Chiou ◽  
Ching-Cheng Chang ◽  
...  
Keyword(s):  
Ring Laser ◽  
Sensor System ◽  
Fiber Ring Laser ◽  
Long Distance ◽  
Fiber Ring ◽  
Fbg Sensor
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