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30 May 1996 Optical fiber sensors for monitoring of structures (OSMOS)
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Optical fiber sensors for monitoring of structures (OSMOS) is a European collaborative research project which has, over the past three years, embraced a number of technological issues related to the problem of structural monitoring in the civil engineering and aerospace industries. A key technical objective of the program was the measurement of temperature and strain using a single sensor length. A laboratory prototype using the differential sensitivities of polarimeters based on the fundamental, LP01 mode and the first higher order LP11 mode of polarization maintaining fiber demonstrated parameter recovery to within 2 C and 5 (mu) (epsilon) . A receiver enabling quasi-distributed measurements to be made with a linear spatial resolution of 70 cm using white light polarimetry was assembled. White light polarimetry was also used in conjunction with pressure sensitive fiber to detect impact damage on a composite radome structure. Impacts of 5 Joules in magnitude were detected with a spatial resolution of around 1 cm. Microwave radio frequency subcarrier measurement techniques were used to develop the engineering processes necessary to integrate optical sensors into civil engineering structures for simulated applications trials. This enabled issues such as stress transfer, mechanical bonding and sensor protection to be addressed. For the aerospace industry, embedding of optical fiber sensors remains an important issue. Here we developed techniques for embedding connectorized fibers such that the component could be machine finished after curing, an important feature of the manufacturing process.
© (1996) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
W. Craig Michie, Brian Culshaw, Graham Thursby, Maria Konstantaki, Marc J. Turpin, Catherine Lecot, Bertrand Noharet, Michel Lequime, Pietro VaNotti, Antonello Vanucci, Didier Lang, P. Kalb, Roger Davidson, Scott S. J. Roberts, Pantelis Papadopoulos, Aris Ikiades, Jean Chazelas, Philippe Bonniau, Tom Herbst, and A. Windisch "Optical fiber sensors for monitoring of structures (OSMOS)", Proc. SPIE 2718, Smart Structures and Materials 1996: Smart Sensing, Processing, and Instrumentation, (30 May 1996);

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