Source-structure-induced measurement errors in fiber Bragg grating sensor arrays

1994 ◽  
Author(s):  
Timothy A. Berkoff ◽  
Michael A. Davis ◽  
Alan D. Kersey
Keyword(s):  
Fiber Bragg Grating ◽  
Measurement Errors ◽  
Sensor Arrays ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Bragg Grating Sensor ◽  
Source Structure

Signal characteristics of surface-bonded fiber Bragg grating sensor with elastoplastic metallic coating subjected to residual strain

2017 ◽  
Vol 29 (17) ◽  
pp. 3374-3385 ◽  
Author(s):  
Sang-Woo Kim
Keyword(s):  
Fiber Bragg Grating ◽  
Measurement Errors ◽  
Numerical Technique ◽  
Metallic Coating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Minimum Length ◽  
Coated Fiber ◽  
Residual Strains ◽  
Bragg Grating Sensor

This study involved predicting the reflected spectrum of a surface-bonded fiber Bragg grating sensor with an elastoplastic metallic coating wherein residual strains are non-uniformly distributed on the sensor. A profile of residual strains was numerically calculated based on the stepwise numerical technique by adopting strain transfer analysis and was validated by finite element analysis. The reflected spectrum of a metal-coated fiber Bragg grating sensor was consequently simulated to obtain the calculated profile of residual strains through the Transfer-matrix (T-matrix) method and coupled mode theory. The results revealed that a non-uniform profile of permanently induced residual strains along the sensor makes the reflected spectrum distorted. Thus, it is necessary for a metal-coated fiber Bragg grating sensor with a 10-mm Bragg grating to be bonded to a minimum length of 16.0 mm to suppress the signal distortion. The study additionally investigated the effect of parameters of an elastoplastic metallic coating (i.e. thicknesses and mechanical properties) on the spectrum characteristics and proposed minimally required bonding lengths by considering these characteristics. The evaluated spectra of the metal-coated fiber Bragg grating sensors that consider various coating parameters will reduce measurement errors and provide directions to determine geometric parameters when the sensor is actually installed on a structure surface.

Calibration of Etched Fiber Bragg Grating Sensor Arrays for Measurement of Molecular Surface Adsorption

2013 ◽  
Vol 31 (14) ◽  
pp. 2400-2406 ◽  
Author(s):  
R. Mudachathi ◽  
B. N. Shivananju ◽  
G. R. Prashanth ◽  
S. Asokan ◽  
M. M. Varma
Keyword(s):  
Fiber Bragg Grating ◽  
Surface Adsorption ◽  
Sensor Arrays ◽  
Fiber Bragg Grating Sensor ◽  
Molecular Surface ◽  
Bragg Grating ◽  
Bragg Grating Sensor

Simultaneous monitoring of the amplitude and location of loading with fiber Bragg grating sensor arrays

2001 ◽  
Author(s):  
Yong Wang ◽  
Chuan S. Tjin ◽  
Pilate Moyo ◽  
Xiahua Zheng ◽  
James M. W. Brownjohn
Keyword(s):  
Fiber Bragg Grating ◽  
Sensor Arrays ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Bragg Grating Sensor

CCD fiber Bragg grating sensor demodulation system based on FPGA

2010 ◽  
Author(s):  
Q. Zhou ◽  
T. G. Ning ◽  
L. Pei ◽  
J. Li ◽  
X. D. Wen ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Bragg Grating Sensor
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