Dissertation > Excellent graduate degree dissertation topics show

Chaotic Detection Method on Transformer Oil-dissolved Gas Photoacoustic Signal and Analyzing the Influential Factors

Author: ZhouHengYi
Tutor: ChenWeiGen
School: Chongqing University
Course: Electrical Engineering
Keywords: Transformer Photoacoustic Spectroscopy(PAS) Gas photoacoustic signal Chaotic Quantitative analysis
CLC: TM404
Type: Master's thesis
Year: 2010
Downloads: 68
Quote: 0
Read: Download Dissertation

Abstract


Gas photoacoustic spectroscopy as a new sensing technology,it has not consumption or separation gas,high sensitive,good selective,large dynamic range etc excellent features. It provides new ideas and technologies for gas dissolved in transformer oil detection. Photoacoustic signal gas is the only characteristic for gas concentrations analysis, also is the key of the detection system.Firstly,this paper introduces the stimulate mechanisms of gas photoacoustic signal in detailed,emphatically describe the acoustic field distribution and photoacoustic signal amplitude of cylindrical photoacoustic cell, Based on the theory and method of photoacoustic spectroscopy,author designs the gas photoacoustic spectroscopy testing platform, detailed introduces the photoacoustic cell design and production, and analysis the noise of detection system.Aiming at the limitations of currently method to gas photoacoustic signal detection,this paper introduced a conventional chaotic measuring technology. Detailed analysis the detection principle of duffing chaotic system,establish the simulation model for frequency known sine periodic signals,and analysis of the system nonlinear dynamic behavior,Based on this,puts forward a photoacoustic signal of gas in oil detection method based on the cross-correlation and chaotic,and use two kinds of mathematical tools judge state,maximum lyapunov method and double chaotic oscillator difference method analysis on gas photoacoustic signal,the results error not exceed 4.43% and 5.95% respectively,which show that the proposed method can restrain noise detect the weak sine signal in strong noise,and two method have their respective advantages.Besides this paper analyzed the affect factors of gas photoacoustic signal and discuss the relationship between pressure,temperature,laser power,gas concentration, resonant frequency, background gas,resonant frequency drift and gas photoacoustic signal value in detailed, provides the technology reference and support for photoacoustic spectroscopy detection system.Considering the linear relation between single-component gas photoacoustic signal and gas concentration,a photoacoustic spectroscopy quantitative analytical method based on the least squares regression is given,and establish the quantitative analysis model.Use this method to inversion gas concentrations can improve the calculation accuracy.Experimental analysis results with CH4、C2H2 gas shows that the difference of this method and gas chromatographic is not big, and the error of CH4 gas detection does not exceed 4.75%,error of C2H2 gas detection does not exceed 4.22%.

Related Dissertations

  1. Quantitative Analysis of Pyrolysis Component of Typical Low Volatile Coal of Chinese,TQ530.2
  2. A Quantitative Study of Grafts Angiogenesis after Anterior Cruciate Ligamen Reconstruction with Preservation of the Remnant in Rabbit Model,R687.2
  3. Yellow phosphorus storage tank area of Safety Evaluation,TQ126.317
  4. Based on statistical methods of magnetic resonance imaging of the human brain image segmentation and three-dimensional analysis of the data,R445.2
  5. Infrared spectroscopy surfactant aqueous two- phase system of,O647.2
  6. Application Study on Quantitative Analysis of Diffusion-weighted Imaging and Dynamic Contrast-enhanced MRI in Thediagnosis of Breast Lesions,R445.2
  7. Quantifative Analysis on the Research Status of Chinese Gene Field,Q78
  8. CSK coherent technology based digital communication systems analysis,TN918.6
  9. Research on Injection Locking of Diode Lasers,TN248.4
  10. Research on Element Analysis of Steel by Laser Induced Breakdown Spectroscopy Technology,TG115.33
  11. Extraction, Purification, Antioxidation Activity and Stability of Red Pigment from Mulberries,TS264.4
  12. Study on the Determination Method of Aroma Components of Tobacco and Tobacco Essence,TS47
  13. Big Bang Search (BBS) Intelligence Optimization and Its Improvement,O224
  14. Study on Optimal Control for Chaotic System Based on T-S Fuzzy Model,O232
  15. Lead laser ablation pit modeling and single pulse laser-induced breakdown spectroscopy,TN247
  16. Deformation Analysis and Prediction Based on Chaotic Time Series,N945.2
  17. Generalized Synchronization of Complex Dynamical Networks,O415.5
  18. Generalized synchronization and phase synchronization Some Issues,O415.5
  19. Dynamical Study and Circuit Simulation of New Chaotic Systems,O415.5
  20. Research on the Chaotic Spread Spcetrum Signals Blind Estimation Algorithm and the Design of Ranging Scheme,TN914.42
  21. Instant electronic lottery related research programs,TP309.7

CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > General issues > Material
© 2012 www.DissertationTopic.Net  Mobile