Dissertation > Excellent graduate degree dissertation topics show

Study on Dust Concertiation Measurement Technique Based on Optical Back-Scattering

Author: QianZuo
Tutor: SunXiaoGang
School: Harbin Institute of Technology
Course: Instrument Science and Technology
Keywords: Mie Scattering Back-Scattering Dust Concentration
CLC: X831
Type: Master's thesis
Year: 2008
Downloads: 90
Quote: 0
Read: Download Dissertation


As the industrial and agricultural development, especially in industrial development, the hazards of dust have also become increasingly serious. China is a big country of coal, where the coal is about 75 percent in the total energy. In this situation for quite a long period of time there will be no fundamental change. The direct burning of a large number of coal decisions to China’s air a coal-burning pollution. Many cities are long-term high in the total suspension of particles.Suspended particles in the atmosphere pollutants, particularly small particles, damage greatly on human health. It is the formation of various respiratory diseases. It also has serious implications on the environment. It is important to governance suspended particles of pollutants for the protection of nature and human. The study resolves issues surrounding the measurement of the concentration of dust. From the theory expounded the feasibility of measuring the concentration of dust by back-scattering methods. It has the analysis of the characteristics of back-scattering through theoretical analysis and MATLAB simulation. By measuring in perspective for the post to 180°, the light intensity of back-scattering can get to the 0.4 percent of all. The back-scattering of proportion will not change with it, when the size parameter is larger than three. The intensity of the back-scattering is proportional to the concentration of dust, but inverse proportion to the receiving distance.Measuring instruments was designed, including the chamber, the circuit, such as optical design. Modulation of the laser line based on the number lock-in technology design center frequency of 110 Hz lock-in amplifier, receiver signal demodulator. The apparatus has the ability to extract weak signals from a strong noise background.

Related Dissertations

  1. Preparation and characterization of anti- transparent fabric key technologies,TS106
  2. Airborne Radar Clutter Simulator,V243.2
  3. The Monte Carlo Study of Polarized Light Propagation in Atmosphere: Simulation and Application,O436.3
  4. The Analysis and Spectrum Simulation of Alexandrium Tamarense Optical Properties,X173
  5. Study on the Remote Sensing Monitoring of Wetland in the Dongting Lake Using ENVISAT ASAR Data,X87
  6. Numerical Simulation and Optimization of Construction Ventilation in the Underground Powerhouse,TV554
  7. Study on the Effect of Broad-band Source’s Spectrum Characteristic to the Fiber Optic Gyroscope,V241.5
  8. Develpoment of the On-line Monitoring Flue Dust Concentration,X831
  9. Study on Theory and Experiment of Measuring Concentration of Flue-dust Based on Optical Back-Scattering Model,X831
  10. Investigation on Scattering/Transmission Method of Particle Concentration Measurement,X831
  11. Investigation of Moisture Steam Characteristic Measurement Methods in Steam Turbine Based on Light Scattering,TM311
  12. Identity Self-rescue and Behavioral Paradox of Ding Ling: Query into Intellectual’s Character,I206.6
  13. Distribution of Aerosol Extinction Coefficients and Slant Visibility Measured by Lidar,TN958.98
  14. Design of Dust Concentration Detecting System Based on β-Radiation-Absorption-Method,TP274
  15. Typical Terrain Modeling and SAR Image Simulation Based on Fractal,TN957.52
  16. The Infrared Emissivity of ZnO with Different Particle Size and Morphology,TB383.1
  17. The Study of Wake Bubble Distributing Characteristics Based on Optical Characteristics,TP391.41
  18. Development and Elementary Application of Polarized Backscattering Spectroscopic System,R318.51
  19. The soil microwave remote sensing Mechanism,TP79
  20. Proton , helium D, T elastic scattering cross section measurements,O571

CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Environmental monitoring > Atmospheric monitoring
© 2012 www.DissertationTopic.Net  Mobile