TY - GEN
T1 - A novel multi-functional fibre optic sensor
AU - Mahendran, Ramani S.
AU - Machavaram, Venkata R.
AU - Wang, Liwei
AU - Burns, Jonathan M.
AU - Harris, Dee
AU - Kukureka, Stephen N.
AU - Fernando, Gerard F.
PY - 2009/6/15
Y1 - 2009/6/15
N2 - Whilst considerable progress continues to be made on the design and deployment of fibre optic sensors for chemical process monitoring and structural integrity assessment, the majority of these sensor designs can only impart information on one or two relevant measurands. For example, in the case of chemical process monitoring of advanced fibrereinforced composites involving thermosetting resins, it is generally appreciated that cross-linking kinetics can be influenced by a number of factors including the following: the stoichiometry of the reagents, temperature, surface chemistry of the substrate and presence or absence of contaminants. Thermosetting resins also shrink during the crosslinking process. When thermosets are used and processed above room temperature during the production of fibrereinforced composites, upon cooling back to ambient temperature, residual stress can develop due to the mismatch in thermal expansions between the reinforcing fibres and the matrix. This paper reports on recent progress on the design and demonstration of a novel multi-functional fibre optic sensor that can provide data on (i) temperature, (ii) strain, (iii) refractive index, (iv) transmission infrared spectroscopy and (v) evanescent wave spectroscopy. A unique and attractive feature of this sensor is that a conventional commercially available Fourier transform infrared spectrometer is used to interrogate the sensor. The sensor design is based on an extrinsic fibre Fabry-Perot interferometer.
AB - Whilst considerable progress continues to be made on the design and deployment of fibre optic sensors for chemical process monitoring and structural integrity assessment, the majority of these sensor designs can only impart information on one or two relevant measurands. For example, in the case of chemical process monitoring of advanced fibrereinforced composites involving thermosetting resins, it is generally appreciated that cross-linking kinetics can be influenced by a number of factors including the following: the stoichiometry of the reagents, temperature, surface chemistry of the substrate and presence or absence of contaminants. Thermosetting resins also shrink during the crosslinking process. When thermosets are used and processed above room temperature during the production of fibrereinforced composites, upon cooling back to ambient temperature, residual stress can develop due to the mismatch in thermal expansions between the reinforcing fibres and the matrix. This paper reports on recent progress on the design and demonstration of a novel multi-functional fibre optic sensor that can provide data on (i) temperature, (ii) strain, (iii) refractive index, (iv) transmission infrared spectroscopy and (v) evanescent wave spectroscopy. A unique and attractive feature of this sensor is that a conventional commercially available Fourier transform infrared spectrometer is used to interrogate the sensor. The sensor design is based on an extrinsic fibre Fabry-Perot interferometer.
KW - Composite
KW - Cure
KW - Fabry-Perot
KW - Fibre Bragg grating (FBG)
KW - Multi-functional
KW - Refractive index
KW - Residual strain
UR - http://www.scopus.com/inward/record.url?scp=66749184901&partnerID=8YFLogxK
U2 - 10.1117/12.817615
DO - 10.1117/12.817615
M3 - Conference contribution
AN - SCOPUS:66749184901
SN - 9780819475534
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Smart Sensor Phenomena, Technology, Networks, and Systems 2009
T2 - Smart Sensor Phenomena, Technology, Networks, and Systems 2009
Y2 - 9 March 2009 through 11 March 2009
ER -