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Proceedings Paper

Packaged FBG sensors for real-time stress monitoring on deep-water riser
Author(s): Jian Xu; Dexing Yang; Yajun Jiang; Meirong Wang; Huailun Zhai; Yang Bai
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Paper Abstract

The safety of under-water risers in drilling platform is of great significance. A packaged fiber Bragg grating (FBG) sensor for real-time stress monitoring is designed for the applications on oil drilling risers under 3000 meters deep water. A copper tube which is the main component of the sensor has a small hole along its axes and a groove at its each end. The bare FBG is passed through the small hole and fixed to its ends by epoxy resin. Then the copper tube is packaged by filling the groove with structural adhesive. In order to avoid that the outer water-pressure is applied on the epoxy resin through the structural adhesive, a gap between the two types of glues is left. The relationships between the stress of the riser and the tension, pressure, temperature of the single sensor are discussed, respectively. The measured tension sensitivity is 136.75 pm/KN while the minimum R-square value is 0.99997. The experimental results also show that there is a good linear response between water-pressure and the Bragg wavelength from 0 to 30MPa, and the sensor can even survive under the pressure more than 30MPa. In addition, the Bragg wavelength shifts linearly with the increasing temperature from 0 to 40°C. So, the pressure and temperature can be easily compensated if another sensor without tension is used.

Paper Details

Date Published: 11 November 2014
PDF: 6 pages
Proc. SPIE 9274, Advanced Sensor Systems and Applications VI, 92740F (11 November 2014); doi: 10.1117/12.2073538
Show Author Affiliations
Jian Xu, Northwestern Polytechnical Univ. (China)
Dexing Yang, Northwestern Polytechnical Univ. (China)
Yajun Jiang, Northwestern Polytechnical Univ. (China)
Meirong Wang, Northwestern Polytechnical Univ. (China)
Huailun Zhai, Northwestern Polytechnical Univ. (China)
Yang Bai, Northwestern Polytechnical Univ. (China)

Published in SPIE Proceedings Vol. 9274:
Advanced Sensor Systems and Applications VI
Tiegen Liu; Shibin Jiang; Niels Neumann, Editor(s)

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