DocumentCode :
39012
Title :
Biaxial Fiber Bragg Grating Accelerometer Using Axial and Transverse Forces
Author :
Kuo Li ; Chan, Tommy H. T. ; Man Hong Yau ; Thambiratnam, David P. ; Hwa Yaw Tam
Author_Institution :
Sch. of Civil Eng. & Built Environ., Queensland Univ. of Technol., Brisbane, QLD, Australia
Volume :
26
Issue :
15
fYear :
2014
fDate :
Aug.1, 1 2014
Firstpage :
1549
Lastpage :
1552
Abstract :
We demonstrate the first biaxial fiber Bragg grating (FBG) accelerometer using axial and transverse forces. An inertial object is fixed at the middle of two FBGs inscribed in one fiber. The difference between the resonant wavelengths of the two FBGs can distinguish the acceleration in the axial direction, while being insensitive in the transverse direction. The average of the resonant wavelengths of the two FBGs can distinguish the acceleration in the transverse direction, while being insensitive in the axial direction. In the experiments, when the transverse direction was vertical, the crest-to-trough sensitivity at 5 Hz and resonant frequency of the average were 0.545 nm/g and 34.42 Hz, respectively. When the axial direction was vertical, those of the difference were 0.0454 nm/g and 900 Hz, respectively. For each FBG, the crest-to-trough sensitivity at 5 Hz and resonant frequency in the transverse/vertical direction were 24 and 1/26 times those in the axial/vertical direction, respectively.
Keywords :
Bragg gratings; accelerometers; fibre optic sensors; FBG; axial direction; axial force; biaxial fiber Bragg grating accelerometer; crest-to-trough sensitivity; frequency 5 Hz; inertial object; resonant frequency; resonant wavelength; transverse direction; transverse force; Acceleration; Accelerometers; Fiber gratings; Resonant frequency; Sensitivity; Vibrations; Accelerometer; fiber Bragg grating; optical fiber sensor;
fLanguage :
English
Journal_Title :
Photonics Technology Letters, IEEE
Publisher :
ieee
ISSN :
1041-1135
Type :
jour
DOI :
10.1109/LPT.2014.2329009
Filename :
6826538
Link To Document :
بازگشت