Abstract
This paper discusses the use optical fiber Bragg grating (FBG) strain sensors for structural dynamics measurements and modal analysis. For some industrial applications, the use of strain sensors (combined or not with accelerometers) can bring benefits such as reduced size and weight. In many of these applications, FBG sensors lead the class of new sensor technologies that make dynamic strain measurements more attractive, with additional qualities such as the reduction of cabling, immunity to electromagnetic interference and higher sensor robustness. On the other hand, the main difficulty in the use of this technology is their integration and synchronization with other types of sensors, since their acquisition usually requires a separate specialized measurement unit. This is an important requirement in modal analysis, where synchronization between input and output measurements is a key issue that can directly affect the quality of the data. In this paper, FBG sensors are used in an experimental modal analysis, where their analogue signal is digitalized on the same way as the electrical sensors, guaranteeing synchronization.
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Acknowledgements
Fábio Luis Marques dos Santos, first author of this paper, is an Early Stage Researcher at Siemens Simulation & Test Solutions, under the FP7 Marie Curie ITN project “IMESCON” (FP7-PEOPLE-2010-ITN, Grant Agreement No. 264672). This research was also carried out in the Framework of FP7 ICT Collaborative project “WiBRATE” (FP7-ICT-2011-7, Grant Agreement No. 289041). The authors of this work gratefully acknowledge the European Commission for the support.
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dos Santos, F.L.M., Peeters, B., Gielen, L., Desmet, W., Góes, L.C.S. (2015). The Use of Fiber Bragg Grating Sensors for Strain Modal Analysis. In: Mains, M. (eds) Topics in Modal Analysis, Volume 10. Conference Proceedings of the Society for Experimental Mechanics Series. Springer, Cham. https://doi.org/10.1007/978-3-319-15251-6_11
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DOI: https://doi.org/10.1007/978-3-319-15251-6_11
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