Self-Referencing Fiber Bragg Grating Sensor for Structural Damage Detection

2021 ◽  
Author(s):  
Junghyun Wee ◽  
Kevin Alexander ◽  
Kara Peters
Keyword(s):  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Structural Damage ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Structural Damage Detection ◽  
Bragg Grating Sensor

Study on Damage Detection Based on Long-gage Fiber Bragg Grating Sensor

2014 ◽  
Vol 51 (1) ◽  
pp. 010604
Author(s):  
田石柱 Tian Shizhu ◽  
温科 Wen Ke ◽  
王大鹏 Wang Dapeng
Keyword(s):  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Bragg Grating Sensor

Quasi-static macrostrain-based structural damage detection with distributed long-gauge fiber Bragg grating sensing

2020 ◽  
Vol 31 (18) ◽  
pp. 2137-2151
Author(s):  
Zhenwei Zhou ◽  
Chunfeng Wan ◽  
Da Fang ◽  
Liyu Xie ◽  
Hesheng Tang ◽  
...  
Keyword(s):  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Structural Damage ◽  
Civil Engineering ◽  
Time History ◽  
Bragg Grating ◽  
Intrinsic Mode Functions ◽  
Structural Damage Detection ◽  
Engineering Structures ◽  
Damage Scenarios

The distributed long-gauge fiber Bragg grating sensing technology has been studied and developed in recent years for structural health monitoring of civil engineering structures. Also, the corresponding damage identification method is one of the research hotspots and still needs to be enhanced. In this article, a novel damage detection method based on the distributed long-gauge fiber Bragg grating sensing technique is proposed to detect and localize damages. The method is based on the advanced complete ensemble empirical mode decomposition adaptive noise algorithm. Measured macrostrain responses from the long-gauge fiber Bragg grating sensors are decomposed into intrinsic mode functions, and the quasi-static macrostrains are extrapolated and extracted. A damage indicator is therefore proposed and built based on the quasi-static macrostrain time history. The effectiveness of the proposed damage detection approach was validated by numerical simulations of a cantilever beam. The robustness of the method was further verified by considering the noise pollution contained within the measured macrostrain. Experiments with a practical cantilever steel beam with different damage scenarios were also conducted and studied. Results proved that the proposed method could not only detect but also locate the damages accurately, and therefore has the promising potential for structural damage detection in civil engineering.

CCD fiber Bragg grating sensor demodulation system based on FPGA

2010 ◽  
Author(s):  
Q. Zhou ◽  
T. G. Ning ◽  
L. Pei ◽  
J. Li ◽  
X. D. Wen ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Bragg Grating Sensor
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