Improved Φ-OTDR system with narrow pulses for quantitative strain measurement based on ultra-weak fiber bragg grating array

2016 ◽  
Vol 58 (12) ◽  
pp. 2892-2894 ◽  
Author(s):  
Yixin Zhang ◽  
Zheng Guo ◽  
Weiyan Qiao ◽  
Yuanyuan Shan ◽  
Yinsen Cai ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Measurement ◽  
Bragg Grating ◽  
Grating Array

Enhanced Φ - OTDR system for quantitative strain measurement based on ultra-weak fiber Bragg grating array

2016 ◽  
Vol 55 (5) ◽  
pp. 054103 ◽  
Author(s):  
Xuping Zhang ◽  
Zheng Guo ◽  
Yuanyuan Shan ◽  
Zhenhong Sun ◽  
Siyi Fu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Measurement ◽  
Bragg Grating ◽  
Grating Array

Online reflectivity measurement of an ultra-weak fiber Bragg grating array

2013 ◽  
Vol 24 (10) ◽  
pp. 105102 ◽  
Author(s):  
Zhihui Luo ◽  
Hongqiao Wen ◽  
Xiaofu Li ◽  
Huiyong Guo
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Reflectivity Measurement ◽  
Grating Array

Speed Estimation of a Three Phase Induction Motor Using Stator Dynamic Strain Measurement by Fiber Bragg Grating Sensor based in SVR

2021 ◽  
Author(s):  
Rafael Mancuso Paraiso Cavalcanti ◽  
Jaqueline Bierende ◽  
Beatriz Brusamarello ◽  
Jean Carlos Cardozo Da Silva ◽  
Giovanni Alfredo Guarneri ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Induction Motor ◽  
Strain Measurement ◽  
Fiber Bragg Grating Sensor ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Speed Estimation ◽  
Three Phase ◽  
Bragg Grating Sensor

Femtosecond-laser-inscribed Fiber Bragg grating array for quasi-distributed high-temperature sensing

2021 ◽  
Author(s):  
Baijie Xu ◽  
Jun He ◽  
Xizhen Xu ◽  
Jia He ◽  
Ziyong Chen ◽  
...  
Keyword(s):  
High Temperature ◽  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
Temperature Sensing ◽  
Bragg Grating ◽  
Grating Array

RETRACTED: Internal strain measurement by fiber Bragg grating sensors in textile composites

2000 ◽  
Vol 60 (5) ◽  
pp. 657-669 ◽  
Author(s):  
Xiaoming Tao ◽  
Liqun Tang ◽  
Wei-chong Du ◽  
Chung-loong Choy
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Measurement ◽  
Textile Composites ◽  
Internal Strain ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

scholarly journals Phase sensitive distributed vibration sensing based on ultraweak fiber Bragg grating array using double-pulse

2017 ◽  
Vol 56 (08) ◽  
pp. 1 ◽  
Author(s):  
Tao Liu ◽  
Feng Wang ◽  
Xuping Zhang ◽  
Lin Zhang ◽  
Quan Yuan ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Double Pulse ◽  
Bragg Grating ◽  
Vibration Sensing ◽  
Phase Sensitive ◽  
Grating Array

Damage localization with fiber Bragg grating Lamb wave sensing through adaptive phased array imaging

2018 ◽  
Vol 18 (1) ◽  
pp. 334-344 ◽  
Author(s):  
Zhenhua Tian ◽  
Lingyu Yu ◽  
Xiaoyi Sun ◽  
Bin Lin
Keyword(s):  
Fiber Bragg Grating ◽  
Electromagnetic Interference ◽  
Lamb Wave ◽  
Phased Array ◽  
Minimum Variance ◽  
Bragg Grating ◽  
Damage Localization ◽  
Weighting Factors ◽  
Wave Imaging ◽  
Grating Array

Fiber Bragg gratings are known being immune to electromagnetic interference and emerging as Lamb wave sensors for structural health monitoring of plate-like structures. However, their application for damage localization in large areas has been limited by their direction-dependent sensor factor. This article addresses such a challenge and presents a robust damage localization method for fiber Bragg grating Lamb wave sensing through the implementation of adaptive phased array algorithms. A compact linear fiber Bragg grating phased array is configured by uniformly distributing the fiber Bragg grating sensors along a straight line and axially in parallel to each other. The Lamb wave imaging is then performed by phased array algorithms without weighting factors (conventional delay-and-sum) and with adaptive weighting factors (minimum variance). The properties of both imaging algorithms, as well as the effects of fiber Bragg grating’s direction-dependent sensor factor, are characterized, analyzed, and compared in details. The results show that this compact fiber Bragg grating array can precisely locate damage in plates, while the comparisons show that the minimum variance method has a better imaging resolution than that of the delay-and-sum method and is barely affected by fiber Bragg grating’s direction-dependent sensor factor. Laboratory tests are also performed with a four–fiber Bragg grating array to detect simulated defects at different directions. Both delay-and-sum and minimum variance methods can successfully locate defects at different positions, and their results are consistent with analytical predictions.

Monitoring system of railway track based on identity weak fiber Bragg grating array

2019 ◽  
Vol 48 (6) ◽  
pp. 622001
Author(s):  
张 翠 Zhang Cui ◽  
陶 渊 Tao Yuan ◽  
童杏林 Tong Xinglin ◽  
邓承伟 Deng Chengwei ◽  
何 为 He Wei ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Monitoring System ◽  
Railway Track ◽  
Bragg Grating ◽  
Grating Array
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