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.

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.

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.

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.

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

Variable transmission ratio strategy for improving brake feeling based on driver’s target braking strength

2020 ◽  
pp. 095440702095988
Author(s):  
Shuaipeng Shi ◽  
Chunyan Wang ◽  
Guoping Chen ◽  
Leiyan Yu ◽  
Wanzhong Zhao
Keyword(s):  
High Speed ◽  
Self Organization ◽  
Transmission Ratio ◽  
Learning Method ◽  
Multi Objective Optimization ◽  
Characteristic Parameters ◽  
Variable Transmission ◽  
Variable Power ◽  
Simulation Results ◽  
The Relationship

Due to the absence of vacuum sources for electric vehicle, the vacuum booster is replaced by electronic brake boosting (EBB) system. In order to improve the driver’s brake feeling based on EBB, this work fully exploits the flexible and variable power-assisted characteristics, and designs different transmission ratios according to the driver’s target braking strength. To identify the driver’s braking strength, an improved radial basis function (IRBF) neural network, combining self-organization method and supervised learning method, is proposed to establish the relationship between the driver’s braking strength and the characteristic parameters. Based on this, the variable transmission ratio strategy is designed, and its main optimized parameters are optimized by means of multi-objective optimization algorithm to provide the driver with a satisfactory brake feeling. The strategies under fixed and variable transmission ratios are simulated and analyzed in low-speed with gentle-brake and high-speed with emergency-brake. The simulation results show that, compared with the fixed transmission ratio, the proposed variable transmission ratio shows excellent performances in both brake feeling and brake safety.

Interference on Measuring SO2 Concentration of the Monodispersion Soot Position Using NDIR

2014 ◽  
Vol 910 ◽  
pp. 198-201
Author(s):  
Yan Jun Zhao ◽  
Cheng Bin Gao ◽  
Bin Qu
Keyword(s):  
Sulfur Dioxide ◽  
Light Intensity ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Infrared Light ◽  
Acceptance Angle ◽  
Sulfur Dioxide Concentration ◽  
Pollutant Sources ◽  
Sulfur Dioxide Emission ◽  
The Common

In the environment research, Sulfur Dioxide is one of the most important pollutants of the stationary pollutant sources and Sulfur Dioxide emission concentration is the important parameters of EPA pollutant monitoring system in the fomer study. NDIR is the common method on measuring Sulfur Dioxide emission concentration. The monodispersion soot difference position can change the collection acceptance angle of the received system and can influent the infrared light intensity, so Sulfur Dioxide emission concentration error is increasing. To reduce the monodispersion soot position interference, the interference is studied in this paper. The monodispersion soot different angle range infrared light intensity is calculated. Numerical simulation results show that the monodispersion soot difference position can reduce Sulfur Dioxide concentration measurement accuracy. The solution method is brought out and can improve the Sulfur Dioxide concentration accuracy.

Protection Windows Interference of the Multidispersion Soot on NDIR NO2 Concentration Accuracy

2014 ◽  
Vol 886 ◽  
pp. 228-231
Author(s):  
Yan Jun Zhao ◽  
Cheng Bin Gao
Keyword(s):  
Numerical Simulation ◽  
Light Intensity ◽  
Nitrogen Dioxide ◽  
Measurement Accuracy ◽  
Solution Method ◽  
Mie Theory ◽  
Measurement Methods ◽  
Concentration Measurement ◽  
Soot Concentration ◽  
Simulation Based

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

Monodispersion Soot Position Interference Mechanism on Measuring the Soot Concentration Using the Scattering Method

2012 ◽  
Vol 534 ◽  
pp. 285-288
Author(s):  
Yan Jun Zhao ◽  
Hai Tao Zhang ◽  
Xuan Zhao ◽  
Bin Qu
Keyword(s):  
Light Intensity ◽  
Measurement Accuracy ◽  
Concentration Measurement ◽  
Scattering Method ◽  
Soot Concentration ◽  
Soot Particles ◽  
Original Measurement ◽  
Atmosphere Pollution ◽  
The Difference ◽  
Interference Mechanism

The soot emission concentration of the stationary pollution sources is one of the important measurement parameters of the atmosphere pollution CEMS. The monodispersion soot position can affect the original measurement light intensity and reduce the soot concentration measurement accuracy. To reduce the monodispersion soot particles position interference, the monodispersion soot particles position interference mechanism is studied in this paper. The difference angle range scattering light intensity of the monodispersion soot is calculated. The numerical simulation results show that the difference soot position can reduce the soot concentration measurement accuracy. The solution method is brought out and can improve the measurement accuracy.

scholarly journals Measuring Hydrometeors Using a Precipitation Microphysical Characteristics Sensor: Sampling Effect of Different Bin Sizes on Drop Size Distribution Parameters

2018 ◽  
Vol 2018 ◽  
pp. 1-15 ◽  
Author(s):  
Xichuan Liu ◽  
Taichang Gao ◽  
Yuntao Hu ◽  
Xiaojian Shu
Keyword(s):  
Drop Size ◽  
Rain Rate ◽  
Monte Carlo Model ◽  
Rain Gauge ◽  
Sampling Schemes ◽  
Distribution Parameters ◽  
Optimum Sampling ◽  
Simulation Results ◽  
The Impact ◽  
Good Agreement

In order to improve the measurement of precipitation microphysical characteristics sensor (PMCS), the sampling process of raindrops by PMCS based on a particle-by-particle Monte-Carlo model was simulated to discuss the effect of different bin sizes on DSD measurement, and the optimum sampling bin sizes for PMCS were proposed based on the simulation results. The simulation results of five sampling schemes of bin sizes in four rain-rate categories show that the raw capture DSD has a significant fluctuation variation influenced by the capture probability, whereas the appropriate sampling bin size and width can reduce the impact of variation of raindrop number on DSD shape. A field measurement of a PMCS, an OTT PARSIVEL disdrometer, and a tipping bucket rain Gauge shows that the rain-rate and rainfall accumulations have good consistencies between PMCS, OTT, and Gauge; the DSD obtained by PMCS and OTT has a good agreement; the probability of N0, μ, and Λ shows that there is a good agreement between the Gamma parameters of PMCS and OTT; the fitted μ-Λ and Z-R relationship measured by PMCS is close to that measured by OTT, which validates the performance of PMCS on rain-rate, rainfall accumulation, and DSD related parameters.

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