Concrete deflection measurement using fiber optic distributed strain system

Martin Papes; Jakub Jaros; Marcel Fajkus; Jan Hurta; Andrej Liner; David Hruby; Vladimir Vasinek

doi:10.1117/12.2196203

29 July 2015 Concrete deflection measurement using fiber optic distributed strain system

Martin Papes, Jakub Jaros, Marcel Fajkus, Jan Hurta, Andrej Liner, David Hruby, Vladimir Vasinek

Proceedings Volume 9659, International Conference on Photonics Solutions 2015; 96591K (2015) https://doi.org/10.1117/12.2196203
Event: International Conference on Photonics Solutions 2015, 2015, Hua Hin, Thailand

Abstract

The monitoring of building structures deformations and testing of construction materials resilience are very important processes in the development and production of given materials and structures. Undesirable or excessive deformations of materials are phenomena which are unacceptable in construction, especially in supporting structures. These issues are currently monitored by electromechanical sensor in most cases. It is a classic technique when the sensor measures the material stress at the point of its installation. This paper deals with the concrete deflection measurement using fiber optic distributed strain system. This system uses optical fiere as a sensor and operates at the principle of measurement of Brillouin frequencies. The mechanical stress on the optical fiber causes shift of these frequencies. This change is subsequently converted to stress unit micro-strain. In our experiments, the optical fiber was embedded in concrete along its whole length. The advantage of this system is that the measurement is carrying out along the entire fiber length with spatial resolution around 50 cm, so it is possible continuously measure several thousands of points at the distance of several kilometers.

Citation Download Citation

Martin Papes, Jakub Jaros, Marcel Fajkus, Jan Hurta, Andrej Liner, David Hruby, and Vladimir Vasinek "Concrete deflection measurement using fiber optic distributed strain system", Proc. SPIE 9659, International Conference on Photonics Solutions 2015, 96591K (29 July 2015); https://doi.org/10.1117/12.2196203

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