长江科学院院报2011，Vol.28Issue(4)：67-70,4.
基于BOTDA的温度和应变测试探讨
Temperature and Strain Test Based on BOTDA
聂俊 1李端有 2梁俊1
作者信息
- 1. 长江科学院,工程安全与灾害防治研究所,武汉,430010
- 2. 水利部水工程安全与病害防治工程技术研究中心,武汉,430010
- 折叠
摘要
Abstract
Distributed optical fiber sensing system based on Brillouin scattering is capable of remote and highly accurate measurement. Accordingly, it has been used widely in the monitoring field of civil engineering. According to the relationship between Brillouin frequency shift and the optical fiber strain, and between Brillouin frequency shift and temperature, the frequency difference among varous areas when the optical energy transfer reaches the maximum can be determined, thus the authors can get the temperature and strain information to achieve distributed measurement. As the distributed optical fiber measurement system based on BOTDA can simultaneously measure temperature and strain, it has greatly improved the efficiency of optical measurements. Temperature test shows that the accuracy of temperature measurement is restricted by the protective layer thickness of optical fiber. Therefore, it can be increased by improving the protective layer. As for the strain test, distributed optical fiber measurement system based on BOTDA proves to have excellent performance-price ratio as it makes the temperature compensation easy, and consequently simplifies the temperature compensation in the traditional strain gauge measuring method, and improves the accuracy of strain measurement.关键词
分布式光纤/BOTDA/布里渊频移/应变测量Key words
distributed optical fiber/ BOTDA/ brillouin scattering/ strain measurement分类
建筑与水利引用本文复制引用
聂俊,李端有,梁俊..基于BOTDA的温度和应变测试探讨[J].长江科学院院报,2011,28(4):67-70,4.
