Bare fiber Bragg grating immunosensor for real-time detection ofEscherichia colibacteria

2016 ◽  
Vol 10 (2) ◽  
pp. 224-230 ◽  
Author(s):  
Rajesh Srinivasan ◽  
Sharath Umesh ◽  
Swetha Murali ◽  
Sundarrajan Asokan ◽  
Sai Siva Gorthi
Keyword(s):  
Fiber Bragg Grating ◽  
Real Time ◽  
Bragg Grating ◽  
Real Time Detection

scholarly journals Real-Time Train Wheel Condition Monitoring by Fiber Bragg Grating Sensors

2011 ◽  
Vol 8 (1) ◽  
pp. 409048 ◽  
Author(s):  
Chuliang Wei ◽  
Qin Xin ◽  
W. H. Chung ◽  
Shun-yee Liu ◽  
Hwa-yaw Tam ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Real Time ◽  
Visual Inspection ◽  
Condition Index ◽  
Bragg Grating ◽  
Time System ◽  
Real Time System ◽  
Fiber Bragg Grating Sensors ◽  
Extensive Field ◽  
The Cost

Wheel defects on trains, such as flat wheels and out-of-roundness, inevitably jeopardize the safety of railway operations. Regular visual inspection and checking by experienced workers are the commonly adopted practice to identify wheel defects. However, the defects may not be spotted in time. Therefore, an automatic, remote-sensing, reliable, and accurate monitoring system for wheel condition is always desirable. The paper describes a real-time system to monitor wheel defects based on fiber Bragg grating sensors. Track strain response upon wheel-rail interaction is measured and processed to generate a condition index which directly reflects the wheel condition. This approach is verified by extensive field test, and the preliminary results show that this electromagnetic-immune system provides an effective alternative for wheel defects detection. The system significantly increases the efficiency of maintenance management and reduces the cost for defects detection, and more importantly, avoids derailment timely.

Fiber Bragg grating sensors for steel wire monitoring in real-time

2014 ◽  
Author(s):  
Jan Koch ◽  
Martin Angelmahr ◽  
Wolfgang Schade
Keyword(s):  
Fiber Bragg Grating ◽  
Real Time ◽  
Steel Wire ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors

Measurement of the Thermal Expansion for Space Structures Using Fiber Bragg Grating Sensors and Displacement Measuring Interferometers

2008 ◽  
Author(s):  
Hong-Il Kim ◽  
Lae-Hyong Kang ◽  
Jae-Hung Han
Keyword(s):  
Fiber Bragg Grating ◽  
Real Time ◽  
Deformation Monitoring ◽  
Space Environment ◽  
Space Structures ◽  
Bragg Grating ◽  
Environment Change ◽  
Time Deformation ◽  
Fiber Bragg Grating Sensors ◽  
Fbg Sensors

Dimensional stability of the space structures, such as large telescope mirrors or metering substructures, is very important because even extremely small deformations of these structures might degrade the optical performances. Therefore, precise deformation data of the space structures according to environment change are required to design these structures correctly. Also, real-time deformation monitoring of these structures in space environment is demanded to verify whether these structures are properly designed or manufactured. FBG (fiber Bragg grating) sensors are applicable to real time monitoring of the space structure because they can be embedded onto the structures with minimal weight penalty. In this research, therefore, thermal deformation measurement system for the space structures, composed of FBG sensors for real time strain measurement and DMI (displacement measuring interferometers) for accurate specimen expansion data acquisition, is developed. Thermal strains measured by distributed FBG sensors are evaluated by the comparison with the strains obtained by highly accurate DMI.

Real Time FTTH Network Monitoring Using Binary Coded Fiber Bragg Grating

Optik ◽  
2021 ◽  
pp. 168408
Author(s):  
Mohammad Syuhaimi Ab-Rahman ◽  
Athirah Mohd Ridzuan ◽  
Iszan Hana Kaharudin ◽  
I-Shyang Hwang
Keyword(s):  
Fiber Bragg Grating ◽  
Real Time ◽  
Network Monitoring ◽  
Bragg Grating

scholarly journals Dynamic Deformation Reconstruction of Variable Section WING with Fiber Bragg Grating Sensors

Sensors ◽  
2019 ◽  
Vol 19 (15) ◽  
pp. 3350 ◽  
Author(s):  
Zhen Fu ◽  
Yong Zhao ◽  
Hong Bao ◽  
Feifei Zhao
Keyword(s):  
Finite Element ◽  
Fiber Bragg Grating ◽  
Real Time ◽  
Beam Theory ◽  
Reconstruction Algorithm ◽  
Support Vector ◽  
Bragg Grating ◽  
Variable Section ◽  
The Difference ◽  
Fuzzy Network

In order to monitor the variable-section wing deformation in real-time, this paper proposes a dynamic reconstruction algorithm based on the inverse finite element method and fuzzy network to sense the deformation of the variable-section beam structure. Firstly, based on Timoshenko beam theory and inverse finite element framework, a deformation reconstruction model of variable-section beam element was established. Then, considering the installation error of the fiber Bragg grating (FBG) sensor and the dynamic un-modeled error caused by the difference between the static model and dynamic model, the real-time measured strain was corrected using a solidified fuzzy network. The parameters of the fuzzy network were learned using support vector machines to enhance the generalization ability of the fuzzy network. The loading deformation experiment shows that the deformation of the variable section wing can be reconstructed with the proposed algorithm in high precision.

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