Dissertation > Excellent graduate degree dissertation topics show

Technology of Optical Fiber Grating Pressure Sensing

Author: CaiAn
Tutor: YinXinDa
School: WRI
Course: Communication and Information System
Keywords: Fiber Bragg Grating(FBG) Pressure sensor diaphragm Temperaturecompensation
CLC: TP212
Type: Master's thesis
Year: 2012
Downloads: 0
Quote: 0
Read: Download Dissertation

Abstract


The fiber Bragg grating(FBG) become one of optical passive devices with the fastest developing speed in recent years. It has many advantages such as anti-electromagnetic, anti-eorrosion, highsensitivity, small size, light weight and so on, beeause of those advantages, it has been used in sensor fields. It can check strain, temperature, pressure,ect. And it becomes a focus in optical fiber sensing fields.In this paper, firstly, the recent developments in the technologies of sensing fiber gratings, the characteristic of FBG sensors and the FBG pressure sensing technology development in the world are reviewed. On the basic of the FBG’s coupling model theory, analyzed the propagation of light in FBG and derived equation of FBG. Various fabrication method’s theory of fiber gratings are described systematically. The temperature, strain and Pressure sensing principles of fiber grating were analyzed.Secondly, there are two key issues for fiber grating sensors, the cross sensitivity with temperature and the sensitivity of sensor. Cross sensitivity problem is studied. Discuss kinds of solutions of simultaneously measuring strain and temperature with fiber grating sensors in details. The advantages and disadvantages of each method are analyzed and compared. And we proposed that the use of passive temperature compensation as well as real-time temperature of residual effect of the initiative amendment to the temperature sensitivity. On the basis of the mechanical theory of elastieity, through theoretical derivations, the prineiple of optical fiber grating pressure sensor which is based on the fixed circular plate diaphragm was got. On the basic of theoretical analysis, optical fiber grating was combined with the fixed cireular plate diaphragm, by measuring the offset of optical fiber grating center wavelength, pressure signal was got.Finally, through testing the charaeteristics of optical fiber grating temperature and strain, it proved that the use of temperature compensation can achieved on the pressure, temperature measurements at the same time. The result showed that the sensor had good resolution, linearity, and precision. It is also showed that this structure FBG pressure sensor can meet the measurements of different range and sensitivity by changing the diaphragm’s parameters, such as geometry size.

Related Dissertations

  1. Silicon pressure sensor design of analog-digital conversion circuit,TP212.1
  2. The Design of the Interferometric Fiber-optic Microphone System Based on 3X3 Coupler,TN912.2
  3. Optimization Design of the Car Clutch Diaphragm Spring,U463.211
  4. Design and implementation of the multi-channel pressure sensor auto-calibration system,TP212
  5. The Research and Exploitation about PMXTM Plus Diaphragm Technology into Electrolytic Device Technology Reform,TB383.2
  6. Mitomycin - modified chitosan sustained-release preparation of the diaphragm , nature and biological evaluation,R779.6
  7. Bacterial cellulose-based acoustic properties of diaphragm materials,TB383.2
  8. Diaphragm fiber EFPI Sensor,TP212
  9. Integrated Control and Simulation of Dry Dual Clutch Transmission System,U463.212
  10. Protective Effects and Mechanism of N-acetylcysteine on Diaphragma in COPD Rats,R563.9
  11. Implementing Optical Wavelet Filter Based on 4F System,TP391.41
  12. Integrated Measurement for Density and Viscosity of Heavy Medium Suspension Based on Differential Pressure,TD94
  13. Synthesis of Functional Ionic Liquids and Their Applications in High-performance Liquid Chromatography,O657.72
  14. The Application of Soil Mixing Wall Engineering Method for Deep Foundation,TU753
  15. Study on the Large T-shaped Diapragm Wall Wharf and Displacement of Anchored Points,U656.112
  16. Tire Pressure Monitoring System Based on MSP430,U463.6
  17. Research on Realtime Calibration System of Pressure Sensor in MWD,TP212.12
  18. The Numerical Analysis on the Deep Foundation Pit Excavation by Steps of Subway Station,TU753
  19. Large diaphragm group Fault Diagnosis System,TH323
  20. Research on Diagnostic Method of Diaphragm Cracking for Diaphragm Pump,TH323
  21. Diaphragm Pump Visual Modeling and Simulation,TH323

CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor
© 2012 www.DissertationTopic.Net  Mobile