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郭斌,刘永莉,周文佐,等. 布里渊光时域反射技术应用于模型实验测试的研究[J]. 科学技术与工程, 2021, 21(4): 1422-1428.
GUO BIN,ZHOU WEN ZUO,et al.Study of Brillouin Optical Time-Domain Reflectometer applied to model experimental test[J].Science Technology and Engineering,2021,21(4):1422-1428.
布里渊光时域反射技术应用于模型实验测试的研究
Study of Brillouin Optical Time-Domain Reflectometer applied to model experimental test
投稿时间:2020-04-23  修订日期:2020-11-03
DOI:
中文关键词:  布里渊光时域反射技术  空间距离分辨率  模型试验  空间密度  植入型式
英文关键词:brillouin optical time-domain reflectometer  spatial distance resolution  model test  spatial density  implant type
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
              
作者单位
郭斌 湖北工业大学
刘永莉 湖北工业大学
周文佐 湖北工业大学
李晨旭 湖北工业大学
熊豪文 湖北工业大学
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中文摘要:
      布里渊光时域反射技术凭借其体积小,结构效应低、数据采集效率高等优点在模型试验中应用具有较大的优势。本文针对布里渊光时域反射技术(Brillouin Optical Time-Domain Reflectometer,简称BOTDR)应用于模型试验中存在距离分辨率相对较大的问题设计试验,考虑光纤位置约束影响因素定义了光纤空间密度,研究了光纤布设长度、型式、植入密度对测试结果的影响。研究结果表明:当试块内部传感光纤长度小于其应变采集仪的距离分辨率时,监测到的结果很难反应试块实际应变情况;当试块内部光纤长度大于光纤应变采集仪分辨率时,随着试块内部光纤长度的增加,相对应变离散度逐渐降低,但同时也受到光纤布设方式的影响;随着光纤植入长度的增大,试块开裂荷载呈现出先增大后减小的趋势;随着光纤空间密度的增大,试块开裂荷载先增大后减小。
英文摘要:
      Distributed optical-fiber sensing technology has great advantages in model tests due to its smaller size, lower structural effect, and higher data acquisition efficiency. In this paper, Design test for the problem of relatively large distance resolution in the application of Brillouin Optical Time-Domain Reflectometer Technology (BOTDR) in the model test. Considering the fiber position as the constraint influence factor that defines the spatial density of the fiber. Test is used to study the influence of the optical fiber length, layout and implant density on the test results. The results showed that when the length of the monitoring fiber inside the test block was less than the distance resolution of the BOTDR, the obtained results was difficult to reflect the actual strain of the test block; When the length of the monitoring fiber inside the test block was greater than the distance resolution of the BOTDR, the relative strain dispersion decreases with the increase of the length of the optical fiber inside the test block, and it is also affected by the optical fiber layout. With increases in the length of the implanted fiber, the cracking load of the test block first increased and then decreased. With increases in the spatial density of the fiber, the cracking load of the test block first increased and then decreased.
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