Graduation Semester and Year
2016
Language
English
Document Type
Thesis
Degree Name
Master of Science in Mechanical Engineering
Department
Mechanical and Aerospace Engineering
First Advisor
Haiying Huang
Abstract
This research presents a single fiber Bragg grating (FBG) sensor that is capable of measuring the axial load and temperature simultaneously. The FBG sensor is coated with a block of recrystallized Lophine, which introduces the bandwidth modulation of the FBG reflectance spectrum. Thermal-mechanical testing of the Lophine-coated FBG sensor under different load and temperature combinations was carried out. It was discovered that the FBG bandwidth is linearly proportional to the applied load and temperature. By fitting the measured FBG bandwidths and central Bragg wavelengths as linear functions of the axial load and temperature, we demonstrated that the axial load and temperature can be inversely determined from the measured reflectance spectrum of a single Lophine-coated FBG sensor. The measurement errors for the axial load and the temperature were found to be ±4 gm and ±4 °C, respectively.
Keywords
Fiber Bragg Grating (FBG), Strain sensor, Temperature sensor, Spectrum bandwidth, Bragg wavelength, Lophin, Structural health monitoring, Optical fiber sensor
Disciplines
Aerospace Engineering | Engineering | Mechanical Engineering
License
This work is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 4.0 International License.
Recommended Citation
Singh, Abhay Kumar, "FIBER BRAGG GRATING (FBG) SENSORS FOR THE SIMULTANEOUS MEASUREMENTS OF STRAIN AND TEMPERATURE" (2016). Mechanical and Aerospace Engineering Theses. 722.
https://mavmatrix.uta.edu/mechaerospace_theses/722
Comments
Degree granted by The University of Texas at Arlington