Using FBG sensor array for monitoring structural security

Rizhong Li; Junbin Huang; Bo Tang; Hongcan Gu

doi:10.1117/12.811309

23 February 2009 Using FBG sensor array for monitoring structural security

Rizhong Li, Junbin Huang, Bo Tang, Hongcan Gu

Proceedings Volume 7278, Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors; 72780A (2009) https://doi.org/10.1117/12.811309
Event: Photonics and Optoelectronics Meetings, 2008, Wuhan, China

Abstract

A method based on FBG sensor array to monitoring large structure's security state is described. A configuration combing a fiber Fabry-Perot tunable filter and a fiber Fabry-Perot interferometer is used to interrogate FBG sensors. The strain signal and acceleration signal can be obtained from the some one FBG sensor, and the number of DFB sensors is reduced to half. The fiber Fabry-Perot tunable filter-based system has the capability to interrogate large number of DFB sensors, whilst obtaining absolute Bragg wavelength with pm resolution. A demonstration system with 4 DFB sensors is presented, which obtains DFB sensor's direct strain value and achieves sub-microstrain resolution at 300Hz interrogating rate. With fast interrogate rate, wide band acceleration signal can also be achieved.

Citation Download Citation

Rizhong Li, Junbin Huang, Bo Tang, and Hongcan Gu "Using FBG sensor array for monitoring structural security", Proc. SPIE 7278, Photonics and Optoelectronics Meetings (POEM) 2008: Fiber Optic Communication and Sensors, 72780A (23 February 2009); https://doi.org/10.1117/12.811309

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