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Proceedings Paper

Distributed feedback fiber laser acoustic emission sensor for concrete structure health monitoring
Author(s): Gengjie Hao; Wenzhu Huang; Wentao Zhang; Baochen Sun; Fang Li
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Paper Abstract

This paper introduces a highly-sensitive fiber optical acoustic emission (AE) sensor and a parameter analysis method aiming at concrete structure health monitoring. Distributed feedback fiber-laser (DFB-FL), which is encapsulated to have a high acoustic sensitivity, is used for sensor unit of the AE sensor. The AE signal of concrete beam in different work stages, based on the four-point bending experiment of the concrete beam, is picked up, and the relationship between the concrete beam work stages and the AE parameter is found. The results indicate that DFB-FLAES can be used as sensitive transducers for recording acoustic events and forecasting the imminent failure of the concrete beam.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570M (2 June 2014); doi: 10.1117/12.2058301
Show Author Affiliations
Gengjie Hao, Institute of Semiconductors (China)
Shijiazhuang Tiedao Univ. (China)
Wenzhu Huang, Institute of Semiconductors (China)
Wentao Zhang, Institute of Semiconductors (China)
Baochen Sun, Shijiazhuang Tiedao Univ. (China)
Fang Li, Institute of Semiconductors (China)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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