Title :
Fiber Bragg grating strain measurements in comparison with additional techniques for rock mechanical testing
Author :
Schmidt-Hattenberger, Cornelia ; Naumann, Marcel ; Borm, G.
Author_Institution :
GeoForschungsZentrum Potsdam, Germany
Abstract :
Fiber Bragg gratings (FBGs) have been used as strain transducers for deformation measurements on two types of granite in uniaxial compression (UC) tests. A comparison of the strain results is given for mechanical extensometers based on cross-flexure strain gages, surface-mounted FBG sensors, and a noncontacting laser extensometer measuring system as additional optical reference.
Keywords :
Bragg gratings; compressive testing; extensometers; fibre optic sensors; geophysical equipment; rocks; strain sensors; cross-flexure strain gages; deformation measurement; equipment; fiber Bragg gratings; geophysical technique; granite; instrument; mechanical extensometers; noncontacting laser extensometer measuring system; rock mechanical testing; rock mechanics; strain measurements; strain transducers; surface-mounted FBG sensors; uniaxial compression tests; Bragg gratings; Capacitive sensors; Fiber gratings; Mechanical sensors; Optical fiber testing; Optical sensors; Strain measurement; Surface emitting lasers; Transducers; Uniaxial strain;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2003.809025
