一种活塞式光纤流体差压传感器数学模型与实验分析  

Mathematical Model and Experimental Analysis of Piston Type Optical Fiber Fluid Differential Pressure Sensor

作　　者：胡浩 邹江河 罗毅[1] HU Hao;ZOU Jiang he;LUO Yi(College of Mechanical Engineering,Guiyang College,Guiyang 550003,China)

机构地区：[1]贵阳学院机械工程学院,贵州贵阳550003

出　　处：《仪表技术与传感器》2020年第4期6-10,共5页Instrument Technique and Sensor

基　　金：贵州省教育厅青年科技人才成长项目(黔教合KY字[2018]308);贵阳市高层次创新型青年教师资助项目(2018);贵阳市科学技术局—贵阳学院科技专项资金项目(GYU-KYZ(2019~2020)JX-08);贵州省教育厅大学生创新创业训练中心建设项目(20180255102)。

摘　　要：对一种活塞式光纤流体差压传感器进行了数学建模与实验分析。首先,基于强度调制原理,提出了一种新型双活塞光纤差压传感器结构,阐述了其工作原理;再建立了该传感器的强度调制模型,并在理论模型的基础上,对传感器进行了仿真研究,得出了传感器在不同结构参数r、NA、d0、L、A1、k取值下的Δp-H曲线;最后,应用自制实验平台进行了气体压差检测实验,分析了传感器的检测性能。实验结果表明:传感器的输出值与压力差Δp之间存在较好的线性度与灵敏度,不同结构参数取值会对传感器的线性度与灵敏度产生不同的影响。在检测气体压差时,传感器输出电压随着压差的增大而增加,且具有近似线性关系。研究表明,传感器理论模型与实验结果趋势相同,传感器能够满足流体压差的检测。In this paper,the mathematical model and experimental analysis of a piston-type optical fiber fluid differential pressure sensor were presented.Firstly,based on the principle of intensity modulation,a new structure of double piston optical fiber differential pressure sensor was proposed,and its working principle was described.Secondly,the intensity modulation model of the sensor was established,and on the basis of the theoretical model,the sensor was simulated,and the Δp-H curves of the sensor under different structural parameters r、NA、d0、L、A1、k were obtained.Finally,the gas pressure difference detection experiment was carried out on the self-made experimental platform,and the detection performance of the sensor was analyzed.The experimental results show that there is a good linearity and sensitivity between the output value of the sensor and the pressure difference Δp.Different structural parameters have different effects on the linearity and sensitivity of the sensor.When detecting the gas pressure difference,the output voltage of the sensor increases with the increase of the pressure difference,and it has an approximate linear relationship.The results show that the theoretical model of the sensor has the same trend as the experimental results,and the sensor can satisfy the detection of fluid pressure difference.

关 键 词：活塞式 光纤 差压传感器 数学模型 实验分析 

分 类 号：TH741[机械工程—光学工程]