基于强度补偿式光纤传感器测金属线胀系数  

Measuring linear expansion coefficient of metal using optical fiber sensor with intensity compensation

作　　者：贾亚民[1] 杨拴科[2] 朱钧[1] 

机构地区：[1]西安交通大学理学院,陕西西安710049 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《物理实验》2008年第10期1-4,共4页Physics Experimentation

摘　　要：分析了强度补偿式光纤位移传感器的补偿机理.通过测量定标,应用最小二乘法确定了该传感器的特性曲线和拟合方程.使用强度补偿式光纤传感器测量了黄铜和铝杆的线胀系数.实验结果表明:强度补偿式光纤位移传感器采用比值运算法给出测量结果,其灵敏度高,稳定性好,用其测量微小位移,可消除一些传统测量方法中待测参量较多而引入过多测量误差的问题,实现非接触测量,且克服反射式非补偿位移传感器因光源光强波动、光纤传输介质损耗及环境光干扰所带来的测量误差.The compensation mechanism of optical fiber displacement sensor with intensity compensation is analyzed. The displacement modulation function and corresponding simulation equation of the sensor are also confirmed by least squares method. The linear expansion coefficients of brass and aluminium are measured. The intensity compensated optical fiber displacement sensor adopting ratio operation method exhibits high sensitivity and stability. Experimental errors in traditional method are avoided, and non-contract measurement is realized.

关 键 词：强度补偿 光纤位移传感器 线胀系数 调制曲线 定标曲线 

分 类 号：TN212.14[电子电信—物理电子学] O343.6[理学—固体力学]