A fiber-optic cure monitoring technique with accuracy improvement of distorted embedded sensors

Umesh Sampath; Hyunjin Kim; Dae-gil Kim; Minho Song

doi:10.1117/12.2184431

1 July 2015 A fiber-optic cure monitoring technique with accuracy improvement of distorted embedded sensors

Umesh Sampath, Hyunjin Kim, Dae-gil Kim, Minho Song

Proceedings Volume 9655, Fifth Asia-Pacific Optical Sensors Conference; 96550L (2015) https://doi.org/10.1117/12.2184431
Event: Fifth Asia Pacific Optical Sensors Conference, 2015, Jeju, Korea, Republic of

Abstract

A fiber-optic epoxy cure monitoring technique for efficient wind turbine blade manufacturing and monitoring is presented. To optimize manufacturing cycle, fiber-optic sensors are embedded in composite materials of wind turbine blades. The reflection spectra of the sensors indicate the onset of gelification and the completion of epoxy curing. After manufacturing process, the same sensors are utilized for in-field condition monitoring. Because of residual stresses and strain gradients from the curing process, the embedded sensors may experience distortions in reflection spectra, resulting in measurement errors. We applied a Gaussian curve-fitting algorithm to the distorted spectra, which substantially improved the measurement accuracy.

Citation Download Citation

Umesh Sampath, Hyunjin Kim, Dae-gil Kim, and Minho Song "A fiber-optic cure monitoring technique with accuracy improvement of distorted embedded sensors", Proc. SPIE 9655, Fifth Asia-Pacific Optical Sensors Conference, 96550L (1 July 2015); https://doi.org/10.1117/12.2184431

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