光纤Bragg光栅温度与应力的测量分析  

Measurement analysis of temperature and stress based on fiber Bragg grating

作　　者：鱼瑛[1] 余震虹[1] 赵玲君[1] 马仁坤[1] 

机构地区：[1]江南大学通信与控制工程学院,江苏无锡214122

出　　处：《量子电子学报》2010年第5期632-636,共5页Chinese Journal of Quantum Electronics

摘　　要：采用了一种基于等强度悬臂梁的双光纤栅组合法,实现温度与应力的同时测量。选用同一批次生产的参数一致的两根光纤Bragg光栅,将其分别粘贴在等强度梁的上下表面,通过梁上下光栅所受的应力大小相等而方向相反,产生两个反射峰来实现温度与应力的同时测量。通过实验测得光栅温度灵敏度系数为0.1346 nm/℃,梁上下光栅误差仅为0.0001 nm/℃;应力灵敏度系数分别为0.4085nm/N,-0.4089nm/N,误差也仅为0.0004 nm/N。实验结果表明该方法切实可行,制作工艺简单,克服了传统双光栅组合法难以保证测量位置准确性的缺点。A double-grating combination structure based on equi-intensity cantilever is adopted to achieve simultaneous measurement of temperature and stress. Select two fiber Bragg gratings of the same batch of production with consistent parameters, paste them to the upper and lower beam surface, respectively. The upper and lower beam grating suffers from equivalent stress but in opposite direction, resulting in two reflection peaks to achieve the simultaneous measurement of temperature and stress. The measured grating temperature sensitivity coefficient is 0.1346 nm/℃, the upper and lower beam raster error is only 0.0001 nm/℃, and the stress sensitivity coefficients were 0.4085 nm/N, -0.4089 nm/N, separately, errors are only 0.0004nm/N. The experiment result shows that the method is practical and has a simple craftsmanship, moreover, it overcome the traditional double-grating combination disadvantage that is difficult to ensure the accuracy of measuring position.

关 键 词：纤维与波导光学 双参量测量 光纤光栅 温度测量 应力测量 等强度悬臂梁 

分 类 号：TN253[电子电信—物理电子学]