Investigation of positioning of FBG sensors for smart monitoring of oil and gas subsea structures.
Johny, Jincy; Prabhu, Radhakrishna; Fung, Wai-keung; Watson, John
Condition monitoring of offshore structures is an indispensable task in the oil and gas industry. Fibre Bragg Grating (FBG) is the key technology used down-hole in order to sense different physical parameters such as strain, vibration, etc. This paper investigates the effect of FBG sensor positions on its reflected signal, in order to optimise the sensor positioning plan in structural health monitoring of subsea structures. Theoretical and experimental study was carried out on FBG sensors, to evaluate its strain sensitivities with varying positions. In addition, micro-displacement based strain analysis of FBG was carried out using a cantilever setup, in order to identify the effects of tensile and compressive strain under various load conditions. Furthermore, the effect of different grating parameters on FBG sensing signal were also analyzed. Theoretical modeling and simulation of FBG was conducted in MATLAB using the coupled mode theory.
|Start Date||Apr 10, 2016|
|Publication Date||Apr 13, 2016|
|Publisher||Institute of Electrical and Electronics Engineers|
|Institution Citation||JOHNY, J., PRABHU, R., FUNG, W.K. and WATSON, J. 2016. Investigation of positioning of FBG sensors for smart monitoring of oil and gas subsea structures. In Proceedings of the 2016 Marine Technology Society/Institute of Electrical and Electronics Engineers (MTS/IEEE) OCEANS conference: our future is with oceans, 10-13 April 2016, Shanghai, China. Piscataway: IEEE [online], paper ID 7485662. Available from: https://dx.doi.org/10.1109/OCEANSAP.2016.7485662|
|Keywords||Fibre optic sensors; FBG; Coupled mode theory; Structural health monitoring|
JOHNY 2016 Investigation of positioning of FBG