International Journal of Engineering Research in Electronics and Communication Engineering

Interrogator for FBG Strain Sensor

Author : K.Anjali Rao ¹ K.Ram Prasad Rao ²

Date of Publication :22nd December 2016

Abstract: A structural health monitoring system (SHM) is the need of the hour because continuous monitoring of large structures is a cumbersome task. In this paper a fiber Bragg grating (FBG) sensing system for strain measurements is being described. Economically feasible and simple grating based FBG has been used to produce strain and induced voltage corresponding to wave length shift. The fiber optic grating sensors have been used in this research work in static operating conditions. The feasibility of using a FBG sensor system in real time monitoring of strain in an optic fiber has been demonstrated experimentally. Experimental and theoretical results showing capability of the proposed system to perform strain measurement and giving an approximate linear response are presented.

Reference :

1. A.D.Kersay, M.A.Davis, H.J.Patrik,Michel LeBlanc and K. P. Koo, “Fiber grating sensors,” J. Lightwave Technol., 15 ,no.8 PP.1442- 1463,Aug.1997.
2. J. U. Duncombe, “Infrared navigation—Part I: An assessment of feasibility,” IEEE Trans. Electron Devices, vol. ED-11, pp. 34-39, Jan. 1959.
3. C. Y. Lin, M. Wu, J. A. Bloom, I. J. Cox, and M. Miller, “Rotation, scale, and translation resilient public watermarking for images,” IEEE Trans. Image Process., vol. 10, no. 5, pp. 767-782, May 2001.
4. R.S.Weis, A.D.Kersey, T.A.Berkoff, “A fourelement fiber grating sensor array with phasesensitive detection,” IEEE Photonics Technol. Lett., vol.6, pp.1469-1472, 1994.
5. Xiaojun Fang, “Fiber Optic distributed sensing by a loop Sagnac interferometer,” Optics Let., vol.21, pp.444-446, 1996.
6. Y.J.Rao, D.A.Jackson, L.Zhang, and I.Bennion, “Dual-cavity interferometric wavelength-shift detection for in-fiber Bragg grating sensors,” Optics Let., vol.21,pp. 1556-1558,1996.
7. K.O.Hill, G.Meltz, “Fiber Bragg Grating Technology: Fundamentals and Overview,” J Light wave Technol., vol.15, no.8, pp1263-1276, Aug.1997.
8. V.M.Murukeshan, P.Y.Chan, Lin Seng Ong, and A.Asundi, “Intracore fiber Bragg grating for strain measurement in embedded composite structures,” Applied Optics vol.40, pp 145-149, 2001.