Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/14541

TitlePVC smart sensing foil for advanced strain measurements
Author(s)da Silva, Alexandre Ferreira
Gonçalves, Filipe
Ferreira, Luís Alberto de Almeida
Araújo, Francisco Moita
Mendes, P. M.
Correia, J. H.
KeywordsFiber bragg gratings
Fiber-optic sensor
Integrated sensor
Sensor for structural monitoring
Issue dateJun-2010
PublisherIEEE
JournalIEEE Sensors Journal
Abstract(s)Monitoring systems can already be found in common applications, from automotive to aeronautics or biomedical. However, the application of these monitoring systems has not yet been a very easy task, especially, at the sensor application step. A smart structure with sensing capabilities would allow to overcome the existing issues in the installation of sensor networks. As the size of this type of systems and the market requirements are significant, an industrial manufacturing process needed to be considered. An integrated solution based in Fiber Bragg Grating sensors embedded in PVC laminates was manufactured by industrial spread-coating process. The resultant structure is a temperature and strain sensitive foil that was characterized in terms of surface structure, optical response and overall performance. The integrated solution behavior had a slope of 0.8 pm by microstrain with a measurement range of 1.2 mm when the fiber was straight in the foil. Different fiber layouts were also tested and defined the minimum curve radius in 10 mm. The foil also presented a dimensional stability above 99%, ensuring the capability to sustain molding process. A mechanical analysis to evaluate the elongation capabilities and optical response was conducted. Three samples with different sensor positioning were subjected to the test. In the end, a sample, with the sensor in a 45à ° angle regarding the displacement axis, achieved the best compromise between maximum elongation range (25%) and optical response linearity. For the temperature response, a wavelength deviation of 1.7 nm was obtained for a 100 ºC temperature change.
TypeArticle
URIhttp://hdl.handle.net/1822/14541
DOI10.1109/JSEN.2009.2037014
ISSN1530-437X
Publisher versionhttp://dx.doi.org/10.1109/JSEN.2009.2037014
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:DEI - Artigos em revistas internacionais

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