Interrogation of fiber Bragg grating sensors with a fiber grating filter tuned by a cantilever beam

2001 ◽  
Author(s):  
Yunqi Liu ◽  
Zhiguo Liu ◽  
Ka O. Lee ◽  
K. S. Chiang ◽  
Xiaoyi Dong
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Bragg Grating ◽  
Fiber Grating ◽  
Fiber Bragg Grating Sensors

scholarly journals Load Identification for a Cantilever Beam Based on Fiber Bragg Grating Sensors

Sensors ◽  
2017 ◽  
Vol 17 (8) ◽  
pp. 1733 ◽  
Author(s):  
Xuegang Song ◽  
Yuexin Zhang ◽  
Dakai Liang
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Bragg Grating ◽  
Load Identification ◽  
Fiber Bragg Grating Sensors

STRAIN MEASUREMENT AT CANTILEVER BEAM WITH FIBER BRAGG GRATING SENSORS AND COLLIMATORS AND ITS CORRECTION METHOD

2012 ◽  
Vol 06 ◽  
pp. 576-582
Author(s):  
Seung Min Tak ◽  
Min Kyu Kang ◽  
Dong Jin Park ◽  
Seok Soon Lee
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Strain Measurement ◽  
Wave Length ◽  
Correction Method ◽  
The Other ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors ◽  
Fbg Sensors

Recently, Fiber Bragg Grating(FBG) sensors are being used in various fields. However, it has difficulty to measure at the place where it is not possible to connect fibers each other physically. In this study, using FBG a collimator, we have measured strains with a single optical fiber with many FBG sensors where FBG sensors on one optical fiber line is installed on the beam and the other optical fiber line is connected with an optical interrogator installed at stationary side. The optical fiber lines between an optical fiber line with FBG sensors on the beam and the other optical fiber line on the stationary part are connected by the collimator which makes the use of light's unique characteristic - light travels through space. The experiment showed that the wave length of the light were changed to be linear as strains increased, and the accurate strains were measured by applying the collimator collection factor, which was proposed in this paper.

scholarly journals Interrogation unit for fiber Bragg grating sensors that uses a slanted fiber grating

2004 ◽  
Vol 29 (7) ◽  
pp. 676 ◽  
Author(s):  
César Jáuregui ◽  
Antonio Quintela ◽  
José Miguel López-Higuera
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Fiber Grating ◽  
Fiber Bragg Grating Sensors

Experimental Mode Shape Identification for a Cantilever Beam Using Optical Fiber Bragg Gratings

2017 ◽  
Author(s):  
Patrick S. Heaney ◽  
Onur Bilgen
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Mode Shape ◽  
Distributed Parameter ◽  
Bragg Grating ◽  
Single Degree Of Freedom ◽  
Fiber Bragg Grating Sensors ◽  
Single Degree ◽  
Distributed Parameter Model

Parameter estimation of a cantilever beam model typically involves estimating the effective parameters of the system for an assumed mode shape. This shape assumption, which is difficult to verify with traditional single-point sensors, can be validated through the distributed strain measurements available from optical Fiber Bragg Grating sensors. In this paper, the experimental mode shapes of a cantilever beam acquired from Fiber Bragg Grating sensors are compared with the analytical predictions of classical beam theory for the first two bending modes. A single degree of freedom model is also analyzed for the first bending mode and compared to the distributed parameter model and experimental data. It is shown that the distributed parameter model provides a good estimate of the strain profile at the first two natural frequencies, and that the single degree of freedom and distributed parameter models are in close agreement at the first natural frequency.

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