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http://dx.doi.org/10.7734/COSEIK.2018.31.5.259

Fundamental Experiment to Verify the Resolution of Hetero-core Fiber Optic Sensor for the Prestress Measurement  

Park, Eik-Tae (Department of Civil Engineering, Pukyung National Univ)
Choi, Kwang-Su (Department of Civil Engineering, Pukyung National Univ)
Kim, Tae-Yang (Department of Civil Engineering, Pukyung National Univ)
Lee, Hwan-Woo (Department of Civil Engineering, Pukyung National Univ)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.31, no.5, 2018 , pp. 259-266 More about this Journal
Abstract
This is the study for developing the hetero-core optical fiber sensors which are purpose to measure the prestress of PSC bridges during the life cycle period. The goal of this study is to improve the resolution of hetero-core sensors. As a result of the test, it is possible to measure the displacement in $2{\mu}m$ increments. In other words, if the length of the sensor module is 30cm, it is possible to measure the prestress variations in 0.2MPa increments at specified compressive strength of concrete(fck) of 40MPa by Hook's Law. So it can be useful for development of a sensor module measuring internal prestress measurement.
Keywords
hetero-core; optical fiber sensor; opm(optical power meter); prestress;
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