Health monitoring system for a tall building with Fiber Bragg grating sensors

2009 ◽  
Author(s):  
D. S. Li ◽  
H. N. Li ◽  
L. Ren ◽  
D. S. Guo ◽  
G. B. Song
Keyword(s):  
Fiber Bragg Grating ◽  
Monitoring System ◽  
Health Monitoring ◽  
Tall Building ◽  
Bragg Grating ◽  
Health Monitoring System ◽  
Fiber Bragg Grating Sensors

Abnormal diagnosis of fiber Bragg grating strain gauges in health monitoring system

2021 ◽  
Vol 29 (11) ◽  
pp. 2581-2589
Author(s):  
Xiao SUN ◽  
◽  
Qing-mei WANG ◽  
Zhen-wei LI ◽  
Jing-jing CHU ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Monitoring System ◽  
Health Monitoring ◽  
Strain Gauges ◽  
Bragg Grating ◽  
Health Monitoring System

scholarly journals Structural Health Monitoring of a Tall Building during Construction with Fiber Bragg Grating Sensors

2012 ◽  
Vol 8 (10) ◽  
pp. 272190 ◽  
Author(s):  
D. S. Li ◽  
L. Ren ◽  
H. N. Li ◽  
G. B. Song
Keyword(s):  
Structural Health Monitoring ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Electromagnetic Interference ◽  
Structural Integrity ◽  
Tall Building ◽  
Bragg Grating ◽  
Long Distance ◽  
Structural Health ◽  
Fiber Bragg Grating Sensors

Fiber Bragg grating sensors demonstrate a great potential as a structural health monitoring tool for civil structures to ensure structural integrity, durability, and reliability. The advantages of applying fiber optic sensors to a tall building include their immunity to electromagnetic interference and their multiplexing ability to transfer optical signals over a long distance. In the work, fiber Bragg grating sensors, consisting of strain and temperature sensors, are applied to structural monitoring of an 18-floor tall building since the date of its construction. The strain transferring rate from host material to the fiber core is discussed and the calibration of packaged fiber Bragg grating sensor is presented. The main purposes of the investigation are monitoring temperature evolution history within concrete during the pouring and curing process, measuring variation of the main column strains on the underground floor while upper 18 floors were subsequently added on, and monitoring relative displacement between two foundation blocks. Fiber Bragg grating sensors have been installed and integrated continuously for more than five months. Monitoring results of temperature and strain are presented in the paper. Furthermore, temperature lag behavior between concrete and its surrounding air is investigated.

POTENTIAL OF BRAGG GRATING SENSORS FOR AIRCRAFT HEALTH MONITORING

2007 ◽  
Vol 31 (1) ◽  
pp. 1-17 ◽  
Author(s):  
Nezih Mrad
Keyword(s):  
Structural Health Monitoring ◽  
Monitoring System ◽  
Health Monitoring ◽  
Bragg Grating ◽  
Fibre Optic ◽  
Fibre Optic Sensor ◽  
Health Monitoring System ◽  
Structural Health ◽  
Structural Health Monitoring System ◽  
Optic Sensor

The increased requirement to operate military platforms and aerospace structures beyond their designed life imposes heavy maintenance and inspection burden on aircraft operators and owners. In-service structural health monitoring is potentially a cost-effective approach by which service usage information can be obtained and knowledgeable decisions can be made. Advanced sensor technology, such as optical fibres, are expected to provide existing and future aircraft with added intelligence and functionality, reduced weight and cost, enhanced robustness and performance. This paper furthers the understanding of technical and practical issues related to full implementation of a fibre optic sensor based structural health monitoring system for aerospace and military platforms. It also reports experimental findings on the use of fibre Bragg grating sensors for measurement of parameters relevant to aircraft structural monitoring and smart structures; with an emphasis on the suitability of multifunctional fibre optic sensor system. Experimental evaluations revealed that Bragg grating sensors correlate well with conventional sensors technology for temperature, stain, crack growth and cure monitoring and were insensitive to pressures up to 300 psi. These sensors were determined to have minimum impact on the structural integrity when embedded parallel to host fibres into composite laminates. Recommendations on the implementation and integration of these sensors into a structural health monitoring system are also provided.

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