Concatenated Bragg grating fiber-optic sensors for simultaneous measurement of curvature, temperature, and axial pressure

Publikationstyp
Journal Article
Date Issued
2024-07-08
Sprache
English
Author(s)
Shojaei Khatouni, Sohrab 
Mikrosystemtechnik E-7  
Zakowski, Sven  
Hosseini Vedad, Reza  
Masjedi, Mustafa
Askar, Akram
Ewald, Jan Christian Eli  
Trieu, Hoc Khiem  
Mikrosystemtechnik E-7  
TORE-DOI
10.15480/882.13129
TORE-URI
https://hdl.handle.net/11420/48263
Journal
Journal of sensors and sensor systems  
Volume
13
Issue
2
Start Page
147
End Page
155
Citation
Journal of Sensors and Sensor Systems 13 (2): 147-155 (2024)
Publisher DOI
10.5194/jsss-13-147-2024
Scopus ID
2-s2.0-85198274201
Publisher
Copernicus Publications
Peer Reviewed
true
This paper presents the development and evaluation of four sensors based on multiple fiber Bragg grating (FBG) constellations embedded in a silicon dioxide single-mode fiber (SMF) for simultaneous measurement of pressure, temperature, and bending curvature. We applied dimension and material variations – including core, cladding, and coating dimensions; coating material; and the number and arrangement of the FBGs – to optimize the reflected signal response and increase information density. A bootstrap-aggregated ensemble of decision trees was used to evaluate the sensor signal. The results show that adjusting the cladding-to-coating ratio led to significant improvements in pressure and bending prediction performance. Additionally, two combined FBGs were fabricated to form a fiber Bragg grating Fabry–Pérot interferometer, which enabled the detection of curvature with a root-mean-square error (RMSE) of 0.0034 L mm -1( R2=1), axial pressure with an RMSE of 0.0564 bar ( R2=0.99), and temperature with an RMSE of 0.0265 °C ( R2=1). At the time of writing, there is no commercially available instrument that can perform these measurements simultaneously.
Subjects
MLE@TUHH
DDC Class
621.3: Electrical Engineering, Electronic Engineering
620: Engineering
530: Physics
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by/4.0/
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