分布式光纤裂缝传感技术的试验研究  

Experimental Study on Technology of Distributed Optical Fiber Crack Sensing

作　　者：闵兴鑫[1] 孙曼[1] 刘浩吾[1] 

机构地区：[1]四川大学水电学院,成都610065

出　　处：《石河子大学学报（自然科学版）》2009年第2期240-243,共4页Journal of Shihezi University(Natural Science)

基　　金：国家自然科学基金项目(50579094)

摘　　要：为探讨光纤—混凝土复合体在开裂过程中形成的力学—光学本构关系,本文采用模型试验方法对混凝土裂缝监测的分布式光纤传感力学—光学本构关系进行了实测标定,将试验结果中的混凝土裂缝宽度和光损耗值绘于坐标图上,分别采用半对数坐标幂函数拟合和普通坐标的多项式拟合2种方法建立了二者之间的函数关系。2种拟合方法结果的比较表明,普通坐标多项式拟合法优于半对数坐标幂函数拟合法。Using the technology of distributed optical fiber sensing for concrete crack monitoring needs to master the mechanics-optics constitutive relation during fiber-concrete complex being cracking. So the mechanics-optics consti- tutive relation of distributed optical fiber sensing for concrete crack sensing has been calibrated by using the method of model tests. The experimental results of the concrete crack width and optic loss have been painted on coordinated Fig. and the function relations of optic loss to crack width in the experimental results have been carried out by the method of curve fitting. The half-logarithm coordinated power function fitting and common coordinated polynomial fitting were used. The comparison between the two fitting methods shows that the common coordinated polynomial fitting is better than the half-logarithm coordinated power function fitting.

关 键 词：分布式光纤传感 光纤裂缝传感:模型试验 力学-光学本构关系 曲线拟合 

分 类 号：TU196.1[建筑科学—建筑理论] TN247[电子电信—物理电子学]