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Proceedings Paper

Recent results on a novel distributed optical crack sensor for concrete structures
Author(s): Noah Gale Olson; Christopher K.Y. Leung; Aidong Meng; Xinyang Wang
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Paper Abstract

Continuing research into a novel distributed crack sensor yields quantitative results. Crack monitoring is an important element in making structural health assessments of concrete structures. The current investigation aims to develop a distributed crack sensor that does not require prior knowledge of crack location and employs a small number of fibers to monitor a large number of cracks. The basic design of the sensor is a polymer sheet containing an inclined fiber that is coupled to a structure. The principle of the sensor is that cracking in the structural member leads to cracking in the polymer sheet that induces fiber bending which leads to signal loss. Monitoring the backscattered signal provides crack opening size and location. A theoretical model for optical fiber loss prediction along with experimental results is shown to be in close agreement. Previous reports addressed the feasibility of such a novel sensing technique. This report will show quantitative results, which enhances the credibility of this new sensing method.

Paper Details

Date Published: 14 February 2002
PDF: 9 pages
Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); doi: 10.1117/12.456093
Show Author Affiliations
Noah Gale Olson, Massachusetts Institute of Technology (Hong Kong)
Christopher K.Y. Leung, Hong Kong Univ. of Science and Technology (Hong Kong)
Aidong Meng, Nanjing Univ. of Aeronautics and Astronautics (China)
Xinyang Wang, Hong Kong Univ. of Science and Technology (Hong Kong)

Published in SPIE Proceedings Vol. 4578:
Fiber Optic Sensor Technology and Applications 2001
Michael A. Marcus; Brian Culshaw, Editor(s)

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