TY - JOUR
T1 - Simultaneous measurement of strain and curvature using superstructure fibre Bragg gratings
AU - Gwandu, B.A.L.
AU - Shu, X.W.
AU - Liu, Y.
AU - Zhang, W.
AU - Zhang, L.
AU - Bennion, I.
PY - 2002/2/28
Y1 - 2002/2/28
N2 - We report the first demonstration of the simultaneous measurement of strain and curvature, with temperature compensation, using a single superstructure fibre Bragg grating (SFBG). The SFBG exhibits the properties of both the fibre Bragg grating (FBG) and the long period fibre grating (LPG) such that its spectral response facilitates strain measurement from the wavelength shift of the FBG-like characteristic, and independent measurement of curvature from the LPG-like mode-splitting characteristic. The dependence of the LPG mode-splitting on the mode order has also been investigated and utilised for the measurement of very small curvatures.
AB - We report the first demonstration of the simultaneous measurement of strain and curvature, with temperature compensation, using a single superstructure fibre Bragg grating (SFBG). The SFBG exhibits the properties of both the fibre Bragg grating (FBG) and the long period fibre grating (LPG) such that its spectral response facilitates strain measurement from the wavelength shift of the FBG-like characteristic, and independent measurement of curvature from the LPG-like mode-splitting characteristic. The dependence of the LPG mode-splitting on the mode order has also been investigated and utilised for the measurement of very small curvatures.
KW - sampled fibre Bragg grating
KW - smart structures
KW - strain and curvature sensing
UR - http://www.scopus.com/inward/record.url?scp=0037186163&partnerID=8YFLogxK
U2 - 10.1016/S0924-4247(01)00782-8
DO - 10.1016/S0924-4247(01)00782-8
M3 - Article
SN - 1873-3069
VL - 96
SP - 133
EP - 139
JO - Sensors and Actuators A : physical
JF - Sensors and Actuators A : physical
IS - 2-3
ER -