Simultaneous measurement of humidity and temperature by combining a reflective intensity-based optical fiber sensor and a fiber Bragg grating

2002 ◽  
Vol 2 (5) ◽  
pp. 482-487 ◽  
Author(s):  
F.J. Arregui ◽  
I.R. Matias ◽  
K.L. Cooper ◽  
R.O. Claus
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Simultaneous Measurement ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Bragg Grating

Three-parameter optical fiber sensor based on a tilted fiber Bragg grating

2010 ◽  
Vol 49 (31) ◽  
pp. 6085 ◽  
Author(s):  
Nélia J. Alberto ◽  
Carlos A. Marques ◽  
João L. Pinto ◽  
Rogério N. Nogueira
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Bragg Grating

scholarly journals Investigation on Low Cost Optical Fiber Sensor Interrogator

2021 ◽  
Vol 64 (5) ◽  
pp. 765-767
Author(s):  
Yandong Gong ◽  
Ke Li ◽  
Zhuo Zhang
Keyword(s):  
Structural Health Monitoring ◽  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Lower Cost ◽  
Low Cost ◽  
Optical Fiber Sensor ◽  
Fiber Sensor ◽  
Bragg Grating ◽  
Fbg Sensors

Abstract— Optical fiber sensor is attracting more attention in the structural health monitoring of civil applications. A general interrogator which can be used for both SOFO and fiber Bragg grating (FBG) sensors has been proposed, it has a lower cost with a much simpler design. Its accuracy can reach up to ~2.5 με, it has a niche market where it can compete with the conventional sensors.

Measurement of pile load transfer using the Fiber Bragg Grating sensor system

2004 ◽  
Vol 41 (6) ◽  
pp. 1222-1232 ◽  
Author(s):  
Woojin Lee ◽  
Won-Je Lee ◽  
Sang-Bae Lee ◽  
Rodrigo Salgado
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Axial Load ◽  
Load Transfer ◽  
Optical Fiber Sensor ◽  
Sensor System ◽  
Fiber Sensor ◽  
Bragg Grating ◽  
Fbg Sensors ◽  
Bragg Grating Sensor

A series of laboratory and field tests were performed to evaluate the applicability of an optical fiber sensor system in the instrumentation of piles. A multiplexed sensor system, constructed by arranging several Fiber Bragg Grating (FBG) sensors along a single line of optical fiber, is capable of measuring local axial strains as a function of wavelength shifts. The distributions of axial load in three model piles and a field test pile evaluated from the strains measured by FBG sensors are found to be comparable, in terms of both magnitude and trend, with those obtained from conventional strain gauges. This suggests that the FBG sensor system is an effective tool for the analysis of the axial load transfer in piles. The successful instrumentation of a soil–cement injected precast (SIP) pile using FBG sensors suggests that the use of these sensors in drilled shafts and other types of cast in situ concrete piles is feasible. With the rapid advance of optical fiber sensor technology, the economics of the use of optical fiber sensors in this type of instrumentation is expected to improve significantly in coming years.Key words: pile foundation, load transfer, fiber optic sensor, Fiber Bragg Grating sensor.

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