摘要
设计了一种用于流体压力的反射式光纤压力传感器。利用高反射率的弹性膜片作为光纤位移传感器的反射镜 ,由光纤光强分布理论出发 ,通过理论计算 ,分别给出了膜片直径、光纤芯径、光纤端面到膜片的初始距离与灵敏度的关系 ,为传感器设计最佳参数选择提供了参考。文中指出 ,传感器中光纤可以选用 2 0 0 μm左右大芯径光纤 ,膜片直径可以选 2～ 3mm ,光纤端面与膜片初始距离可选 2mm左右。在此情况下 ,传感器具有较高灵敏度和较好的线性。
A novel fiber sensor used for gas or fluid body pressure measurement is designed. An elastic spherical diaphragm is used as a reflective target. The diaphragm coils when force is performed upon. Light intensity of receiving fiber changes depending on the deformation of the elastic spherical diaphragm. The relationship between sensitivities of the sensor and diameters of the elastic diaphragm, diameters of fibers and the distance from the terminal of fiber to the initial diaphragm (before force performed upon) are calculated based on light distributing theory. From the consequence of calculations, we give out the optimum condition for this kind fiber sensor design. The diameter of fiber can be chosen around 200 μm. The diaphragm diameter can be chosen as 2～3 mm. The initial distance between the fiber terminal and the diaphragm are around 2 mm. Under these conditions, the pressure fiber sensor has a good linearity and high sensitivity.
出处
《传感技术学报》
CAS
CSCD
2004年第1期133-135,共3页
Chinese Journal of Sensors and Actuators
基金
深圳市科技局资助项目 (项目编号 :2 0 0 0 15 )
关键词
光纤压力传感器
流体压力
反射率
光强分布
变形
fiber displacement sensor
distributing of light lntensity
sensitivity
deformation
