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Proceedings Paper

Distributed fiber optic crack sensor for concrete structures
Author(s): Wentao Zhang; Jingyun Dai; Hua Xu; Baochen Sun; Yanliang Du
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Paper Abstract

In this paper a novel distributed fiber optic crack sensor with polymer encapsulation based on optical time domain reflectometer (OTDR) is presented. The sensor head includes two layers of polymer and a bare fiber embedded in them. The crack induced deformation in the sensor head will result in the bend loss in the fiber. Utilizing the OTDR measurement, the position and the size of the crack can be determined. Two types of fiber arrangement are introduced in this paper. Experiment was carried out to evaluate the performance of the distributed fiber optic crack sensor. The primary results show that the fiber optic crack sensor has good linearity between the bend loss and the crack open size. The crack size resolution is better than 1mm.

Paper Details

Date Published: 26 November 2007
PDF: 6 pages
Proc. SPIE 6830, Advanced Sensor Systems and Applications III, 68300F (26 November 2007); doi: 10.1117/12.757864
Show Author Affiliations
Wentao Zhang, Shijiazhuang Railway Institute (China)
Institute of Semiconductors (China)
Jingyun Dai, Shijiazhuang Railway Institute (China)
Hua Xu, Shijiazhuang Railway Institute (China)
Baochen Sun, Shijiazhuang Railway Institute (China)
Yanliang Du, Shijiazhuang Railway Institute (China)

Published in SPIE Proceedings Vol. 6830:
Advanced Sensor Systems and Applications III
Yun-Jiang Rao; Yanbiao Liao; Gang-Ding Peng, Editor(s)

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