Dissertation > Excellent graduate degree dissertation topics show

FBG strain sensor demodulation techniques

Author: ZhouCuiRong
Tutor: WangMing
School: Nanjing Normal University
Course: Physical Electronics
Keywords: Optical fiber sensing Fiber grating Strain sensing Intensity demodulation M-Z interferometer
CLC: TP212.14
Type: Master's thesis
Year: 2011
Downloads: 54
Quote: 1
Read: Download Dissertation

Abstract


With the rapid development of optical fiber communication and optical fiber sensing technology, fiber optic sensor as a new type of detection device to be more original applications and research. Unlike conventional electrical sensors, fiber optic sensors to optical signal conversion and transmission carrier, small size, light weight, immunity to electromagnetic interference, applicable to flammable explosive harsh environments. These advantages not only has ordinary optical fiber sensor fiber Bragg grating sensors, but also due to the characteristics of its own wavelength encoding, which makes fiber Bragg grating sensor light sources not subject to ups and downs, fiber bend loss, connection loss factors. The fiber grating design wavelength, with self-referential, does not require the inherent reference points, can be achieved on the real-time monitoring of the structural integrity, safety, and the degree of damage. Through the use of dense wavelength division multiplexing technology, but also distributed fiber Bragg grating sensor array detection, a broad application prospects in large-scale civil engineering, aerospace, energy, chemical, and other fields. The application of the principle of fiber Bragg grating sensors. Fiber grating structure analysis sensitive strain characteristics of fiber grating, fiber grating reflection spectrum of expression and the coupled mode theory is derived and applied strain numerical simulation of reflection spectrum of mobile. Discussion of the various forms of fiber grating package principle and their advantages and disadvantages, and gave details of the package selected method and operation process. Used several fiber grating static strain sensing device and its theoretical formula, Izod static strain fiber Bragg grating sensor experimental system, optical sensing analyzer provides scanning light source and spectral analysis, the experimental observations. existing experimental conditions, the total build two sets of the Izod static strain device, respectively, of its strain sensitivity was calculated and analyzed, the experiments show that the good performance of the the Izod FBG sensor with high linearity. By the reflection spectrum of the fiber grating based on the intensity demodulation fiber grating strain sensors, by appropriate selection of the laser light source and fiber grating in a certain dynamic range, the output signal light intensity and dynamic strain most significant both a linear relationship between, according to the theoretical analysis of the experimental system, experimental observations. In addition, we also study the Mach-Zehnder fiber transmission interference strain sensor measurement system. Basic structure and principles of the system of fiber optic the MZ interferometer measurement strain build experimental system for experimental observation, the experimental results are discussed.

Related Dissertations

  1. Spectral Characteristics and Sensing Characteristics Investigation of the Long-period Fiber Grating,TP212
  2. Research on the Spectral Characteristics and Sensing Applications of Photonic Crystal Fiber Grating,TP212
  3. Research on Distributed Fiber Optic Vibration Sensor,TP212.14
  4. Ring light in the Fizeau interferometer system design and research,TH744.3
  5. Equal thickness interferometer for large-size digital measurement of flatness,TH744.3
  6. Special multi-parameter sensing fiber grating and its application,TP212.14
  7. Coating hole point diffraction interferometer design and debugging,TH744.3
  8. Study on All-Fiber Q-Switching Laser and Fiber Amplifier System,TN248
  9. Based on dispersion decreasing fiber optical pulse compression technology research,TN929.11
  10. Research on the Method for Testing Diffraction Wave-Front,TH744.1
  11. Precision micro- displacement worktable vertical scanning white light interferometer,TH744.3
  12. Design and Research of a Kind of Wide Range and High Precision FBG Displacement Sensor,TN253
  13. Embedded Steel Wire FRP Smart Bar and Monitoring Prestress Loss,TU378.2
  14. Nondestrucitve Detection Approach for Delamination Patches in FRP,TU317
  15. Development and Research of NC System for Measuring Experimental Platform with Zero Transmission,TG659
  16. Research of Gantry Crane Health Monitoring Experiment System Based on Option Fiber Grating,TH213.5
  17. Filter Characteristics of Mach-zehnder Interferometer with Two-arm-sharing Structure,O436.1
  18. Energy balance of high-precision displacement measurement system of laser interferometer,TH744.3
  19. Three instantaneous frequency measurement of millimeter wave,TM935.1
  20. Research on Measurement Traceability for Mechanical Properties of Nanomaterial,O341

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