期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 18, 期 1-4, 页码 394-396出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2005.862366
关键词
Brillouin spectrum; distributed Brillouin sensor (DBS); form factors; strain sensor; structural health monitoring (SHM)
We introduce a novel data analysis approach based on the extraction of peak strain, asymmetric and broadening factors of the Brillouin spectrum measured with the distributed Brillouin sensor (DBS). Such an approach provides simultaneously global and local strains, describing the status of the structure, at the contrary of average strain measurements. These results are confirmed by a trial on a composite column subjected to vertical and bending loads. This demonstrates that the DBS is a powerful tool to give the signature of the structure failure and then to identify early problems in structures that none of existing point sensors can detect.
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