Research on Environmental Materials with Monodispersion Soot Particle Interference on SO2 Concentration Measurement Accuracy

2014 ◽  
Vol 1014 ◽  
pp. 295-298
Author(s):  
Bao Hua Chen ◽  
Yan Jun Zhao ◽  
Chong Hao Wang ◽  
Shou Guang Cheng
Keyword(s):  
Light Intensity ◽  
Visible Light ◽  
Measurement Accuracy ◽  
Soot Particle ◽  
Concentration Measurement ◽  
Characteristic Wavelength ◽  
Environmental Materials ◽  
Simulation Results ◽  
The Impact ◽  
So2 Concentration

SO2 is one of the most important atmosphere pollutants which can be figured out by measuring the attenuation of the visible light intensity on the characteristic wavelength. But the visible light intensity is also attenuated by the monodispersion soot particles because of the particles absorption and scattering. The interference of the monodispersion particles is discussed in the paper. Simulation results show that the impact parameters on the SO2 concentration accuracy include the received scattering angle range, particle size and concentration. According to the study SO2 concentration measurement accuracy can be improved

Monodispersion Soot Particle Interference on NO2 Concentration Measurement Accuracy Using NDIR

2013 ◽  
Vol 345 ◽  
pp. 251-254
Author(s):  
Yan Jun Zhao ◽  
Shou Guang Cheng ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Soot Particle ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Infrared Light ◽  
Soot Particles ◽  
Characteristic Wavelength ◽  
The Impact

NDIR is one of the NO2 concentration measurement methods. The NO2 concentration can be figured out by measuring the attenuation of the infrared light intensity on the characteristic wavelength. But the infrared light intensity is also attenuated by the monodispersion soot particles because of the particles absorption and scattering. So the monodispersion soot particles can impact the NO2 concentration accuracy. The interference of the monodispersion particles is discussed in the paper. Simulation results show that the impact parameters on the NO2 concentration accuracy include the received scattering angle range, particle size and concentration. The solution method is brought out and NO2 concentration measurement accuracy can be improved.

Protection Window Pollution Interference of the Monodispersion Soot on Measuring SO2 Concentration Using NDIR

2012 ◽  
Vol 534 ◽  
pp. 289-292
Author(s):  
Yan Jun Zhao ◽  
Dong Xing Wang ◽  
Yi Chen Lu ◽  
Rui Kun Gong
Keyword(s):  
Sulfur Dioxide ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Soot Particle ◽  
Infrared Absorption Spectrum ◽  
Concentration Measurement ◽  
Soot Particles ◽  
Sulfur Dioxide Concentration ◽  
Original Measurement ◽  
Simulation Results

The non-dispersive infrared absorption spectrum method is one of the important sulfur dioxide concentration measurement method. If the soot particles attach on the protection windows surface, the original measurement light intensity is attenuated because of the absorption and scattering of the soot particle and the sulfur dioxide concentration measurement accuracy is decreased. The protection window pollution question caused by the monodispersion soot particles is discussed in the paper. The numerical simulation results show that the sulfur dioxide concentration measurement accuracy is related to the protection window pollution. The solution method is brought out and the measurement accuracy can be improved.

Research on Environment Materials with Soot Position Influence on SO2 Concentration Measurement

2014 ◽  
Vol 540 ◽  
pp. 251-254
Author(s):  
Yan Jun Zhao ◽  
Cheng Bin Gao ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement Method ◽  
Measurement Accuracy ◽  
Measurement Data ◽  
Concentration Measurement ◽  
So2 Emission ◽  
Pollutant Sources ◽  
The Common ◽  
Atmosphere Environment ◽  
So2 Concentration

The pollutant gaseous SO2 concentration is one of the most important parameters in national atmosphere environment monitoring system with properties of environment materials. SO2 emission can be calculated through measuring SO2 concentration. The common SO2 concentration measurement method of the stationary pollutant sources is NDIR. Soot in duct can absorb the measurement light intensity and the different acceptance light intensity of the receiver is caused by soot different position, so the attenuation of SO2 measurement light intensity is increased and the SO2 emission concentration measurement data is error. The different soot position interference is studied in this paper. Simulation results show that soot difference position can interference SO2 concentration measurement accuracy. The experiment is carried on. The experiment result shows that the measurement method can on-time obtains the soot different position interference and decreases SO2 concentration measurement error.

Research on Environment Materials with NDIR NO2 Concentration Measurement by Soot Position Influence

2014 ◽  
Vol 540 ◽  
pp. 255-258
Author(s):  
Yan Jun Zhao ◽  
Cheng Bin Gao ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement System ◽  
Solution Method ◽  
Daily Life ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Infrared Light ◽  
Gaseous Pollutants ◽  
Actual Concentration ◽  
Simulation Results

Environment materials play important role in our daily life. It includes so many types. NO2 is one of the most important gaseous pollutants and NO2 concentration measurement system is one part of the CEMS system. There have many NO2 concentration measurement methods and NDIR is used commonly. The received angle of the measurement light is gradually decreases while the distance between soot and the receiver becomes larger; so the true infrared light intensity is smaller than the theoretical infrared light intensity and NO2 concentration is less than the actual concentration. To reduce the soot position influence, soot position influence on NO2 concentration measurement using NDIR is studied. The influence of the different soot position is analyzed. The simulation results show that the different soot position can influent the NO2 concentration accuracy. The solution method on decreasing the soot poison influence is brought out and can improve the NO2 concentration accuracy.

Multidispersion Soot Interference Mechanism on SO2 Concentration Using NDIR

2013 ◽  
Vol 345 ◽  
pp. 247-250
Author(s):  
Yan Jun Zhao ◽  
Shou Guang Cheng ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement Accuracy ◽  
Measurement Methods ◽  
Infrared Light ◽  
Characteristic Parameters ◽  
Distribution Parameters ◽  
Simulation Results ◽  
Average Size ◽  
The Relationship ◽  
Interference Mechanism

NDIR is one of SO2 concentration measurement methods. SO2 concentration can be figured out through measuring the infrared light intensity changing. The light intensity can be attenuated by the particles, so the SO2 concentration is increased. To solve the particles interference, the multidispersion particles interference mechanism is established. Particles characteristic parameters which interferes the SO2 concentration include the dissipativity, concentration, average size and size distribution parameters. Simulation results give the relationship between the SO2 concentration and particles characteristic parameters. The method to reduce the interference of the SO2 concentration is brought out and the measurement accuracy can be improved.

Interference Mechanism on NO2 Concentration by the Multidispersion Soot Using NDIR

2013 ◽  
Vol 345 ◽  
pp. 255-258
Author(s):  
Yan Jun Zhao ◽  
Shou Guang Cheng ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement Accuracy ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Intensity Attenuation ◽  
Soot Particles ◽  
Infrared Measurement ◽  
Distribution Parameters ◽  
Average Size ◽  
Interference Mechanism

NDIR is one of the important NO2 concentration measurement methods. The NO2 concentration can be figured out through measuring the light intensity attenuation. But the scattering and absorption of the multidispersion soot particles can attenuate the light intensity, so the infrared measurement light intensity attenuation is larger and the concentration is increased. The interference on the NO2 concentration caused by the multidispersion soot particles is discussed in the paper. The dissipativity, concentration, average size, size distribution parameters and the scattering light angle range of the multidispersion soot particles can interference the NO2 concentration. The method to reduce the interference is brought out and the NO2 concentration measurement accuracy is improved.

Research on Environmental Materials with Interference Mechanism on Flue Gas SO2 Concentration Measurement by the Multidispersion Soot

2014 ◽  
Vol 1014 ◽  
pp. 291-294
Author(s):  
Yu Han Gong ◽  
Bao Hua Chen ◽  
Yan Jun Zhao ◽  
Shou Guang Cheng
Keyword(s):  
Light Intensity ◽  
Flue Gas ◽  
Intensity Attenuation ◽  
Soot Particles ◽  
Environmental Materials ◽  
Distribution Parameters ◽  
Scattering Light ◽  
Average Size ◽  
So2 Concentration ◽  
Interference Mechanism

The SO2 concentration can be figured out through measuring the light intensity attenuation. But the scattering and absorption of the multidispersion soot particles can attenuate the light intensity, so the visible measurement light intensity attenuation is larger and the concentration is increased. The interference on the SO2 concentration caused by the multidispersion soot particles is discussed in this paper. The dissipativity, concentration, average size, size distribution parameters and the scattering light angle range of the multidispersion soot particles can interference the SO2 concentration.

Single Soot Particle Interference on Measuring SO2 Concentration Using NDIR

2013 ◽  
Vol 718-720 ◽  
pp. 424-428
Author(s):  
Yan Jun Zhao ◽  
Shou Guang Cheng ◽  
Bin Qu
Keyword(s):  
Sulfur Dioxide ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Soot Particle ◽  
Particle Diameter ◽  
Concentration Measurement ◽  
Light Path ◽  
Soot Particles ◽  
Sulfur Dioxide Concentration ◽  
Original Measurement

The non-dispersive infrared absorption method (NDIR) is one of the important sulfur dioxide concentration measurement methods. If the soot particles are in the measurement light path, the original measurement light intensity is attenuated because of the soot particles absorption and scattering and the sulfur dioxide concentration is increasing, so the accuracy of the sulfur dioxide concentration is decreased. The single soot particle interference caused by the dissipative and the non-dissipative soot scattering and absorption is discussed in the paper. The numerical simulation results show that the sulfur dioxide concentration measurement accuracy is related to the soot particle diameter. The solution method is brought out and the measurement accuracy can be improved.

Windows Multidispersion Soot Interference on SO2 Concentration Measurement Accuracy Using NDIR

2014 ◽  
Vol 886 ◽  
pp. 232-235
Author(s):  
Yan Jun Zhao ◽  
Shou Guang Cheng
Keyword(s):  
Sulfur Dioxide ◽  
Light Intensity ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Mie Theory ◽  
Average Diameter ◽  
Concentration Measurement ◽  
Diameter Distribution ◽  
Measurement Result ◽  
Sulfur Dioxide Concentration

NDIR method is one of the important sulfur dioxide concentration measurement methods. The original and the transmission light intensity on the sulfur dioxide attached on the protection windows is attenuated because of the soot absorption and scattering and the received light intensity of the sulfur dioxide characteristic absorption wavelength is deviated from the theoretical absorption light intensity, so the sulfur dioxide concentration measurement result is error. The protection window soot pollution interference caused by the multidispersion soot is discussed in this paper. The numerical simulation results based on the Mie theory show that the sulfur dioxide concentration measurement result is related to the multidispersion soot average diameter, soot diameter distribution and soot dissipativity. The solution method of the windows pollution soot interference is brought out and sulfur dioxide concentration measurement accuracy can be improved.

scholarly journals Design and Simulation of Compound Eye Lens for Visible Light Communication and Illumination

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Jiehui Li ◽  
Qian Zhang
Keyword(s):  
Light Intensity ◽  
Visible Light ◽  
Compound Eye ◽  
Optical Axis ◽  
Visible Light Communication ◽  
Eye Lens ◽  
Light Power ◽  
Convex Lens ◽  
Array Structure ◽  
Simulation Results

We proposed a scheme for designing an optical launch system that can make the light intensity more uniform on the receiving plane via a compound eye lens combined with a sunflower plano-convex lens. The simulation results demonstrate that the light converges on the optical axis after passing through the sunflower-shaped plano-convex lens array and compound eye lens. The divergence angle and central light intensity of the receiving plane are, respectively, 26.57° and 80.50% of the total emitted light power for the array structure of the compact compound eye plano-convex lens, while those are 21.80° and 62.50% for the discrete compound eye lens. From the above results, it can be seen that the compact compound eye lens is more conducive to the uniform distribution of light intensity on the receiving plane compared with the discrete compound eye lens, taking into account the dual application of illumination and communication.

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