Recent results on a novel distributed optical crack sensor for concrete structures

Noah Gale Olson; Christopher K.Y. Leung; Aidong Meng; Xinyang Wang

doi:10.1117/12.456093

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14 February 2002 Recent results on a novel distributed optical crack sensor for concrete structures

Noah Gale Olson, Christopher K.Y. Leung, Aidong Meng, Xinyang Wang

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Proceedings Volume 4578, Fiber Optic Sensor Technology and Applications 2001; (2002) https://doi.org/10.1117/12.456093
Event: Environmental and Industrial Sensing, 2001, Boston, MA, United States

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.

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Noah Gale Olson, Christopher K.Y. Leung, Aidong Meng, and Xinyang Wang "Recent results on a novel distributed optical crack sensor for concrete structures", Proc. SPIE 4578, Fiber Optic Sensor Technology and Applications 2001, (14 February 2002); https://doi.org/10.1117/12.456093

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