Non-invasive pressure monitoring by hoop strain using fiber Bragg grating sensor

Shikha; Sharath Umesh; Asokan Sundarrajan

doi:10.1117/12.2189663

17 July 2015 Non-invasive pressure monitoring by hoop strain using fiber Bragg grating sensor

Shikha, Sharath Umesh, Asokan Sundarrajan

Proceedings Volume 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015); 95242D (2015) https://doi.org/10.1117/12.2189663
Event: International Conference on Optical and Photonic Engineering (icOPEN2015), 2015, Singapore, Singapore

Abstract

Non-invasive, real-time dynamic monitoring of pressure inside a column with the aid of Fiber Bragg Grating (FBG) sensor is presented in the present work. A bare FBG sensor is adhered on the circumference of a pressure column normal to its axis, which has the ability to acquire the hoop strain induced by the pressure variation inside the column. Pressure induced hoop strain response obtained using FBG sensor is validated against the pressure measurements obtained from conventional pressure gauge. Further, a protrusion setup on the outer surface of the column has been proposed over which a secondary FBG sensor is bonded normal to its axis, in order to increase the gauge length of this FBG sensor. This is carried out in order to validate the variation in sensitivity of the protrusion bonded FBG sensor compared to the bare FBG sensor bonded over the surface. A comparative study is done between the two FBG sensors and a conventional pressure gauge in order to establish the capacity of FBG sensor obtained hoop strain response for pressure monitoring inside the column.

Citation Download Citation

Shikha, Sharath Umesh, and Asokan Sundarrajan "Non-invasive pressure monitoring by hoop strain using fiber Bragg grating sensor", Proc. SPIE 9524, International Conference on Optical and Photonic Engineering (icOPEN 2015), 95242D (17 July 2015); https://doi.org/10.1117/12.2189663

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