DISTRIBUTED MICROBEND FIBER-OPTIC STRAIN SENSOR

分布式光纤微弯应变传感器(英文)

The distributed strain sensor has significant application in real time measurement of strain status for large and important engineering structures such as aircraft, bridge and dam. In this paper, a quasi distributed optical fiber strain sensor system is set up using optical time domain reflect technique. The local strain sensors based on a novel microbend configuration are designed and applied to measure local strains along the optical fiber. As the result of the experimental research, the microbend sensors show high sensitivity, good linearity and repeatability in certain operation range.

分布式应变传感器对大型重要工程结构的应变状态的实时测量具有重要的应用价值。本文研究了一种基于光时域反射技术的准分布式光纤应变传感器系统 ,沿光纤分布各局部点的应变信息由一种新颖结构的微弯应变传感器提取。实验研究表明 ,此微弯应变传感器在一定的工作范围内有较高的灵敏度。