摘要
将基于布里渊光时域反射计(BOTDR)的光纤传感技术引入高铁声屏障结构受损监测中。对立柱倾斜的受损情况进行分析,从理论上得出了立柱倾斜时,立柱顶部相对于初始位置的偏移量与BOTDR测得的光缆应变值之间的对应关系,利用该关系得出不同偏移量下系统的报警阈值。此外,报警阈值的大小也与立柱上光纤粘贴点的高度h相关,报警阈值随着h的增大而增大。同时,本文还搭建了实验系统,实验结果与理论计算结果相吻合。
The fiber sensing techniques based on Brillouin time-domain reflectometry （BOT DR） are introduced and studied to realize the structure damage monitoring of the sound barrier of high-speed railway. The structure damage caused by column tilt is analyzed,and the relationship between the offset relative to the initial position of the columns top and strain value measured by BOTDR is obtained theoretically. Based on this relationship, the alarm threshold value can be obtained. Alarm threshold value is also affected by the height of the point where the fiber is pas- ted on the column （h）, and alarm threshold value increases with h. In addition, the test experi- ment was designed, and the experimental results agree with the theoretical calculation results.
出处
《光电子技术》
CAS
北大核心
2013年第3期208-212,共5页
Optoelectronic Technology
基金
国家重点基础研究发展计划资助项目(2010CB327803)
国家自然科学基金仪器专项重点基金资助项目(61027017)
