2 June 2014 Distributed feedback fiber laser acoustic emission sensor for concrete structure health monitoring
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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.
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Gengjie Hao, Gengjie Hao, Wenzhu Huang, Wenzhu Huang, Wentao Zhang, Wentao Zhang, Baochen Sun, Baochen Sun, Fang Li, 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); doi: 10.1117/12.2058301; https://doi.org/10.1117/12.2058301
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