光纤光栅传感器目前在工业上对高温压力管道表面的应变监控有着广泛的应用。但由于存在应变和温度的交叉影响, 使传感器的测量精确度受到了一定的限制, 不能满足工业实际需要。通过分析FBG应变传感器的基本工作原理, 针对FBG的应变、温度交叉敏感问题, 提出并采用了二元回归分析算法来实现FBG应变传感器的温度补偿模型。由计算机程序运行结果和实验结果表明, 利用二元回归分析法对FBG应变传感器进行数据融合处理后, 温度灵敏系数由2.74×10-2/℃降低为9.16×10-5/℃, 温度的交叉敏感性得到明显改善, 可满足高温压力管道应变测量的实际测量要求。

Binary regression analysis algorithm is proposed and adopted to realize the temperature compensation model of fiber Bragg grating (FBG) strain sensor through analyzing the basic operation principle of the sensor and the issues of FBG strain and temperature cross sensitivity. Computer program and experiment results show that the temperature sensitivity coefficient is lower from 2.74×10-2/℃ to 9.16×10-5/℃ after data fusion processing. And the temperature cross sensitivity is obviously improved to meet the actual measurement requirements of strain measurement in high-temperature pressure conduit.