Distributed feedback fiber laser acoustic emission sensor for concrete structure health monitoring

Gengjie Hao; Wenzhu Huang; Wentao Zhang; Baochen Sun; Fang Li

doi:10.1117/12.2058301

2 June 2014 Distributed feedback fiber laser acoustic emission sensor for concrete structure health monitoring

Gengjie Hao, Wenzhu Huang, Wentao Zhang, Baochen Sun, Fang Li

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91570M (2014) https://doi.org/10.1117/12.2058301
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

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.

Citation Download Citation

Gengjie Hao, Wenzhu Huang, Wentao Zhang, Baochen Sun, and Fang Li "Distributed feedback fiber laser acoustic emission sensor for concrete structure health monitoring", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91570M (2 June 2014); https://doi.org/10.1117/12.2058301

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