Measurement of compressive and tensile strain in the railway structures with FBG sensor packages

Ki-Soo Kim; Young-Jin Kim; Soon-Sung Nam; Hyung-seok Kwon

doi:10.1117/12.821514

3 April 2009 Measurement of compressive and tensile strain in the railway structures with FBG sensor packages

Ki-Soo Kim, Young-Jin Kim, Soon-Sung Nam, Hyung-seok Kwon

Proceedings Volume 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009; 72923G (2009) https://doi.org/10.1117/12.821514
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2009, San Diego, California, United States

Abstract

For monitoring of railway structures, optical fiber sensors are very convenient. The fiber sensors are very small and do not disturb the structural properties. They also have several merits such as electro-magnetic immunity, long signal transmission, good accuracy and multiplicity of one sensor line. Strain measurement technologies with fiber optic sensors have been investigated as a part of smart structure. In this paper, we investigated the possibilities of fiber optic sensor application to the monitoring of railway structures. We expect that the fiber optic sensors have much less noises than electrical strain gauges because of electro-magnetic immunity while railways operate electric power of 22000 volts. Fiber optic sensors showed good durability and long term stability for continuous monitoring of the railway structures as well as good response to the structural behaviors during construction.

Citation Download Citation

Ki-Soo Kim, Young-Jin Kim, Soon-Sung Nam, and Hyung-seok Kwon "Measurement of compressive and tensile strain in the railway structures with FBG sensor packages", Proc. SPIE 7292, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2009, 72923G (3 April 2009); https://doi.org/10.1117/12.821514

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KEYWORDS

Sensors

Fiber Bragg gratings

Fiber optics sensors

Fiber optics

Safety

Smart structures

Temperature metrology

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