Corrosion Fiber Optical Sensor And Its Application In Oil Quality Analyzing And Crude Oil Magnetization Monitoring

The study of EWFBGs,mostly focus on the producing method,form and structure of EWFBGs didn’t be full studied.In addition,only the drifting of the resonance wavelength was used on the change of the refractive index of medium,leading to the loss of applications in physical changes.Therefore,the practicability and generalization of the EWFBGs require improving its structure and enriching its sensing parameters.In this paper,the mechanism of CEWFBGs is researched and as a basis of the design of high sensitivity EWFBGs refractive index sensor,realizing Multi-parameters measurement by observing the wavelength drift and peak amplitude changes.Finally,the designed sensor was applicated in the measurement of concentration and the monitoring of magnetization process respectively.The main research content of this article is as follows:(1)Based on principle of FBG,this paper analysis of the properties of EWFBGs.The mathematical model of reflection wavelength with refractive index of environment and the sensitivity function was obtained in this paper,the relationship between sensitivity,diameter and refractive index was analyzed,which that lay the theoretical foundation for the production of CEWFBGs.(2)Three kinds of curved FBGs were obtained by etching.Observations wavelength and energy change of different curvature FBGs.Reflection spectrum of the FBGs appeared some modes,in the neutral water.(3)Testing the temperature response sensitivity of CEWFBGs,the experiment results show that bending can reduce temperature sensitivity of EWFBGs.(4)The experimental system with gasoline additive concentration and magnetization process of oil was set up,using wavelength drift and peak intensity of CEWFBGs,respectively,realizing multi-parameter applications.This project can not only provide new direction for the innovative research of EWFBGs,but can also promote the EWFBGs to higher sensitivity and better temperature uncorrelated.So,this paper can lay the foundation for more application of EWFBGs.