Fiber-optic intrinsic distributed acoustic emission sensor for large structure health monitoring

2009 ◽  
Vol 34 (12) ◽  
pp. 1858 ◽  
Author(s):  
Sheng Liang ◽  
Chunxi Zhang ◽  
Wentai Lin ◽  
Lijing Li ◽  
Chen Li ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Health Monitoring ◽  
Fiber Optic ◽  
Large Structure ◽  
Structure Health Monitoring ◽  
Acoustic Emission Sensor

Distributed Feedback Fiber Laser Rosette for Acoustic Emission Detection

2013 ◽  
Vol 330 ◽  
pp. 412-417 ◽  
Author(s):  
Wen Zhu Huang ◽  
Wen Tao Zhang ◽  
Huai Xiang Ma ◽  
Fang Li ◽  
Yan Liang Du
Keyword(s):  
Acoustic Emission ◽  
Fiber Laser ◽  
Health Monitoring ◽  
Fiber Optic ◽  
Practical Method ◽  
Distributed Feedback ◽  
Large Structure ◽  
Narrow Line Width ◽  
Emission Detection ◽  
Demodulation Method

This study aims at providing a practical method in large structure health monitoring. A novel fiber optic rosette based on distributed feedback (DFB) fiber laser for acoustic emission (AE) detection and location is presented. The ultra-narrow line width of the DFB fiber laser will result in high resolution in AE wave detection using a fiber optic interferometric demodulation method. The directivity of the fiber optic rosette is investigated. A rosette with three DFB fiber lasers is tested in the experiment to determine the direction of propagation of AE waves.

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