Dissertation > Excellent graduate degree dissertation topics show

Research of Doppler Lidar for Microscale Wind Shear-field Detection

Author: DaiLiLi
Tutor: NiXiaoWu
School: Nanjing University of Technology and Engineering
Course: Optical Engineering
Keywords: Microscale wind field Doppler lidar Fabry-Perot etalon scan mode
CLC: TN958.98
Type: Master's thesis
Year: 2010
Downloads: 131
Quote: 0
Read: Download Dissertation

Abstract


Microscale wind field detection has great importance in increasing aircraft taking off or landing and space shuttle launch or landing operations safety, increasing airport capacity, improving wind turbine efficiency and so on. The traditional wind detection methods can’t meet the requirements of microscale wind detection. Currently, only direct detection Doppler lidar is able to directly measure three-dimensional wind field with high accuracy, high temporal and spatial resolution in the global region.In this paper, on the basis of the basic principles and practical engineering, the Doppler lidar system for microscale wind shear-field detection is studied. The system uses aerosol as detecting target, using Fabry-Perot etalon based dual-edge direct detection technology and PPI scan mode to achieve microscale wind shear-field detection. The overall structure of the system is designed and it’s key parameters, especially the frequency discriminator—Fabry-Perot etalon parameters are optimized. Finally, the wind shear-field retrieval method is introduced and the overall performance of the designed system is analyzed by using the designed parameters of each unit. The numerical simulation results show that under the weather conditions of the visibility greater than 10km, the wind speed accuracies of this Doppler lidar system are better than 0.9m/s from 0 to 8km range, which can achieve the detection guideline. Finally, The wind shear-detection performance of the designed Doppler lidar system is analyzed by using Monte-Carlo method, which validates the wind shear detection capability of this lidar system. The designed and studied results have reference value for the actual system setting up.

Related Dissertations

  1. Fabrication of Microscale Ordered-reinforced Composite and Its Mechanical Characterization,TB33
  2. Effect of Microstructure and Properties of 40Cr Surface Modified Layer by Laser Beam Scanning Mode,TG665
  3. Optimization Research on the Simulation of Smoke in the Fluctuating Wind Field,TP391.41
  4. Experiment Study on Semi-dry Desulfurization of Sintering Flue Gas,X701.3
  5. Wind-induced Response Analysis of Long-Span Concrete-Filled Steel Tube Arch Bridge,U441.3
  6. Study on the Backscattered Singals of Laser Radar,TN958.98
  7. Wind-induced Vibration Response Analyses of Long-Span Arch Bridge Considring Soil-Structure Interaction,U448.22
  8. Wind-Induced Buffrting Analysis for Long-Span Highway Steel Truss Arch Bridge in Time Domain,U441.3
  9. Analysis on Buffeting Response of Railway Cable-Stayed Bridges during Erection Stage,U441.3
  10. Chemical experiments in micro- themed design and practice of network BBS,G633.8
  11. Wind Field Retrieval for Typhoon Based on Partial Differential Equation and Machine Learning,O175.2;P444
  12. The Thermal Response Properties of Metal-dielectric Multi-layer Thin Film Induced by Femtosecond Laser,TN249
  13. CFD Numerical Simulation of Tornado Wind Field and Its Impact of Wind Loads on Building,TU312.1
  14. Expanded Feed Thermal Characteristic Parameters Research and Drying by Numerical Simulation,S816.9
  15. Carry out micro- experiments in high school chemistry teaching training creative ability,G633.8
  16. The Study of Sound Wave Propagation Characteristics Under the Influence of Wind and Temperature Field in the Air,O422
  17. Atmospheric Wind Field Modeling and Its Application,O354
  18. Research of Frequency Discrimination on EDGE for a Doppler Wind Lidar,TN958.98
  19. The Accuracy Research of Doppler Wind Lidar Based on Edge Technique,TN959.4
  20. Experimental Study of Microscale Diffusion Flame in the Electric Field and Limited Space,TK16
  21. The Characteristics of Liquid Poiseuille Flow by Molecular Dynamics Simulation,O351

CLC: > Industrial Technology > Radio electronics, telecommunications technology > Radar > Radar: institutional sub- > Optical positioning radar,laser radar
© 2012 www.DissertationTopic.Net  Mobile