光纤氢气传感器的理论分析  

Theoretical Analysis on Optical Fider Hybrogen Sensor

作　　者：程玉琪 朱昆仑[2] 

机构地区：[1]东南学大 [2]沈阳工业大学

出　　处：《传感技术学报》1990年第1期31-36,共6页Chinese Journal of Sensors and Actuators

摘　　要：在光纤Mach-Zehnder干涉仪的传感臂上粘接一钯片,钯吸收氢气而发生几何尺寸的变化,从而引起光相位的变化.本文运用弹性力学和光弹效应的理论,建立了光相位变化与氢气分压强的关系,很小的氢气分压强可以引起较大的光相位变化.The sensing element is a piece of single mode fiber coated with palladium metal. The palladium layer were expanded by absorption of hydrogen gas. This will cause the strain of the fiber in both axial and radial direction and the change of its effective optical path length, which will changed the optical phase in a low hydrogen partial pressure.

关 键 词：光纤传感器 气敏传感器 氢气检测 钯 

分 类 号：TP212-55[自动化与计算机技术—检测技术与自动化装置]