Health Monitoring Research Based on Fiber Bragg Grating Sensing Technology in Concrete Pouring

2015 ◽  
Vol 734 ◽  
pp. 64-70
Author(s):  
Kai Zhu ◽  
Si Guo Zheng ◽  
Gang Liu ◽  
Qing Chao Zhang
Keyword(s):  
Fiber Bragg Grating ◽  
Real Time ◽  
3D Models ◽  
Bragg Grating ◽  
Theoretical Support ◽  
Sensing Technology ◽  
Safety And Reliability ◽  
Time Observation ◽  
Temperature Strain ◽  
Technical Guidance

Aiming at the problem of hard to monitor features such as temperature, strain in time in large concrete pouring construction process during the construction of urban underground substation, this paper presents applying fiber Bragg grating sensors to collect temperature and strain data in the process of concrete pouring, then demodulating them, and transmitting them to the computer terminal, finally proceeding the real-time online monitoring. Moreover, this paper establishes the 3D models of temperature field and strain field on the basis of one pouring pile, then proceeds dynamic simulation and real-time observation, which can provide certain theoretical support and technical guidance for the site construction, further improve work efficiency, safety and reliability.

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.

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

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.

scholarly journals Slope monitoring and stability analysis of open pit mine based on fiber Bragg grating sensing technology

2018 ◽  
Vol 1065 ◽  
pp. 252002 ◽  
Author(s):  
Ligang Wang ◽  
Lewen Yu ◽  
Yuansheng Zhang ◽  
Da Zhang ◽  
Zhigang Tao ◽  
...  
Keyword(s):  
Stability Analysis ◽  
Fiber Bragg Grating ◽  
Open Pit Mine ◽  
Open Pit ◽  
Bragg Grating ◽  
Sensing Technology ◽  
Slope Monitoring
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