Title :
Identifying fabrication defects of metal packaged fibre Bragg grating sensors for smart pre-stressing strands
Author :
Mckeeman, I. ; Niewczas, P. ; Johnston, M.
Author_Institution :
Dept. of Eng., Univ. of Strathclyde, Glasgow, UK
Abstract :
Metal packaged fibre Bragg grating sensors have the potential to provide reliable measurements of temperature and strain in high stress environments for the purpose of structural health monitoring. However due to the induction brazing fabrication process a small percentage of sensors are found to have defective brazed joints. We demonstrate a defect identification procedure derived from the batch temperature calibration of fibre Bragg grating sensors for temperature and strain measurement, allowing defective sensors to be identified before installation. The procedure was demonstrated on a sample of twelve temperature sensors fabricated for a small-scale smart pre-stressing strand validation test.
Keywords :
Bragg gratings; brazing; calibration; condition monitoring; fibre optic sensors; packaging; strain measurement; strain sensors; structural engineering; temperature measurement; temperature sensors; batch temperature calibration; defect identification procedure; defective brazed joint; induction brazing fabrication process; metal packaged fibre Bragg grating sensor; small-scale smart pre-stressing strand validation test; strain measurement; structural health monitoring; temperature measurement; Bragg gratings; Calibration; Joints; Optical fibers; Temperature measurement; Temperature sensors; condition monitoring; fiber Bragg gratings; strain measurement;
Conference_Titel :
Environmental, Energy and Structural Monitoring Systems (EESMS), 2015 IEEE Workshop on
Conference_Location :
Trento
Print_ISBN :
978-1-4799-8214-1
DOI :
10.1109/EESMS.2015.7175853
