土木与岩土工程监测新技术——BOFDA的性能与特点

发布时间：2018-04-26 10:39

本文选题：布里渊光频域分析技术 + 布里渊光时域分析技术　；参考：《防灾减灾工程学报》2015年06期

【摘要】：在实验的基础上对新型分布式光纤监测技术——布里渊频域分析技术(BOFDA)的感测性能进行了测试与分析,其空间分辨率可达20cm,测试精度可达±2με,测试重复性为±4με;通过与布里渊光时域分析技术(BOTDA)测试性能的比较,对BOFDA的测试性能进行了评价,分析了应变过渡区产生的原因;通过BOFDA等强度梁实验,并与电阻应变片测试结果和理论计算值比较,证明了BOFDA优异的测试性能。最后,对BOFDA在各类工程防灾减灾监测中可能遇到传感光缆的保护及温度补偿问题进行了分析,并提出相应解决方案。
[Abstract]:Based on the experiment, the sensing performance of Brillouin Frequency Domain Analysis (Brillouin Frequency Domain Analysis), a new distributed optical fiber monitoring technology, is tested and analyzed. The spatial resolution can reach 20 cm, the measurement precision is 卤2 渭蔚, and the test repeatability is 卤4 渭蔚. By comparing with the Brillouin optical time domain analysis technique, the test performance of BOFDA is evaluated, and the causes of strain transition region are analyzed. The excellent testing performance of BOFDA is proved by comparing the test results with the results of resistance strain gauges and the theoretical calculation results through the experiments of BOFDA equal strength beams. Finally, the problems of protection and temperature compensation of sensing cables in various engineering disaster prevention and mitigation monitoring by BOFDA are analyzed, and the corresponding solutions are put forward.
【作者单位】：南京大学地球科学与工程学院;苏州南智传感科技有限公司;
【基金】：国家自然科学基金重点项目(41230636) 国家科技支撑计划项目(2012BAK10B05) 国家重点基础研究发展计划(973计划)项目(2011CB710605)资助
【分类号】：TU196

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