Sixteen Channel WDM Fiber Bragg Grating Dynamic Strain Sensing System For Composite Panel Slamming Tests

1997 ◽  
Author(s):  
S.T. Vohra ◽  
M.A. Davis ◽  
A. Dandridge ◽  
C.C. Chang ◽  
B. Althouse ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Composite Panel ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Strain Sensing ◽  
Sensing System

Sagnac fiber interferometer with the population grating for fiber Bragg grating dynamic strain sensing

2021 ◽  
Vol 17 (12) ◽  
pp. 723-728
Author(s):  
Wei Wang ◽  
Chuanyi Tao ◽  
Hao Wang ◽  
Xuhai Jiang ◽  
Rong Chen ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Strain Sensing

A High Resolution Fiber Bragg Grating Resonator Strain Sensing System

2002 ◽  
Vol 21 (3) ◽  
pp. 205-217 ◽  
Author(s):  
T. Allsop ◽  
K. Sugden ◽  
I. Bennion ◽  
R. Neal ◽  
A. Malvern
Keyword(s):  
High Resolution ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Strain Sensing ◽  
Sensing System

scholarly journals Multipoint temperature-independent fiber-Bragg-grating strain-sensing system employing an optical-power-detection scheme

2002 ◽  
Vol 41 (9) ◽  
pp. 1661 ◽  
Author(s):  
Yan-Ju Chiang ◽  
Likarn Wang ◽  
Horng-Shyang Chen ◽  
Chih-Chung Yang ◽  
Wen-Fung Liu
Keyword(s):  
Fiber Bragg Grating ◽  
Optical Power ◽  
Bragg Grating ◽  
Strain Sensing ◽  
Detection Scheme ◽  
Sensing System

DYNAMIC STRAIN SENSING IN A LONG-SPAN SUSPENSION BRIDGE USING FIBER BRAGG GRATING SENSORS

2011 ◽  
Author(s):  
Yinian Zhu ◽  
Yan-Jin Zhu ◽  
Oluwaseyi Balogun ◽  
Songye Zhu ◽  
You-Lin Xu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Suspension Bridge ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Strain Sensing ◽  
Fiber Bragg Grating Sensors ◽  
Long Span

Highly accurate fiber Bragg grating strain- sensing system

1998 ◽  
Author(s):  
Tsung-hsuan Chiu ◽  
Ming-The Chang ◽  
Chung Ho Hsia
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Strain Sensing ◽  
Sensing System

Experimental and numerical investigation of the performance of self-sensing concrete sleepers

2019 ◽  
Vol 19 (1) ◽  
pp. 66-85 ◽  
Author(s):  
Jinlong Xu ◽  
Liam J Butler ◽  
Mohammed ZEB Elshafie
Keyword(s):  
Fiber Bragg Grating ◽  
Prestressed Concrete ◽  
Three Dimensional ◽  
Element Model ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Concrete Cracking ◽  
Rail Network ◽  
Embedded Sensing ◽  
Sensing System

Prestressed concrete sleepers with built-in fibre optic–based sensing systems have recently been developed to capture performance data within railway networks and to provide critical decision-support information to route managers and operators. To better understand how self-sensing sleepers can be fully utilized within the rail network, a study of their comprehensive performance under controlled conditions must be undertaken. This article presents the results of the full-scale laboratory testing of a self-sensing sleeper supported on ballast. A primary focus of this study was to investigate whether a self-sensing sleeper could also be used to estimate rail seat load, detect cracking, and identify differential ballast settlement. The ultimate capacity and resilience of the embedded fiber Bragg grating sensing system was tested by applying load up until concrete cracking followed by several cyclic load cycles. Through inference of the load versus strain response, the ability of the self-sensing sleeper to detect damage (concrete cracking and loss of ballast support) was evaluated. The experimental results revealed the effectiveness and robustness of the embedded sensing system to continue to provide reliable dynamic strain measurements well beyond the ultimate loading capacity of the prestressed sleeper. Cracking of the top surface of the sleeper was effectively detected by the fiber Bragg grating strain sensors at the mid-span section. After cracking, subsequent load cycles were carried out. During this period, the bottom fiber Bragg grating measurements captured the effects of differential ballast settlement under the rail seats. A three-dimensional nonlinear finite element model was developed to simulate the experimental test setup and to investigate the relation between fiber Bragg grating sensor measurements and rail track response. The combined experimental and numerical results suggest that a self-sensing sleeper may be deployed on an operational railway to provide reliable and long-term measurements of rail axle load and ballast pressure.

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