分布式光纤传感技术应变测量试验研究

摘要

This work presents the application of Brilliouin optical time domain reflection technique to monitor the distribution of temperature and strain along the fiber. The spatial resolution, and the resolution and precision of strain of distributed fiber optic sensing technique in strain measurement were tested. Using this technique, the experiments results showed that the strain of every point on the structure could be measured accurately with a minimum spatial resolution of 0.1 m. In addition, the resolution and precision of strain measurement can meet the requirement for engineering inspect.%基于布里渊散射原理的布里渊光时域反射技术利用布里渊散射光的光谱技术和光时域测量技术,可对光纤沿线的温度、应变进行分布式监测.通过试验研究了分布式光纤传感技术在应变测量中的空间分辨率、应变分辨率、应变测量精度.研究结果表明,分布式光纤传感技术应变测量能够较准确地测得被测量结构上任何一点的应变,空间最小分辨率0.1 m,应变测量分辨率和精度满足工程监测要求,可以工程监测中作为一种新型分布式应变监测技术加以推广.