Probability density function of signal amplitude in laser airborne particle counter
-
1.
Department of Information Physics and Engineer, Nanjing University of Science and Technology, Nanjing 210094, China
-
Corresponding author:
BIAN Bao-min, bianbaomin_56@yahoo.com.cn
;
-
Received Date:
2008-12-09
Accepted Date:
2009-02-26
-
Abstract
In order to study the probability distribution of counting signal amplitude in a laser airborne particle counter,the relationship between the probability distribution of counting signal amplitude,particles number density in the sampling air-flow, light-intensity uniformity of the sensitive volume and the speed distribution of the lamellar flow were theoretically analyzed. Then, the probability density distribution of the counting signal amplitudes was tested with a self-designed optical sensor with sheath-air inlet, and it matched well with the theoretical result. In a word, the results indicate that the probability distribution of counting signal amplitude is determined by both the intensity distribution of the sensitive volume and the space distribution of the particles number density, which proposes a theoretical basis for the design of the particle counter.
-
-
References
[1]
|
HUANG H J,ZHAO Y K,REN B Q,et al.Aerosol particle measure-ment by laser diode light scattering[J].Chinese Journal of Lasers,2002,A29(12):1171-1121(in Chinese). |
[2]
|
LI Z Y,LIU Zh Q,YE Y.Study on the effects of selection and process of the holography film for in-line particles holography[J].Laser Technology,2005,29(6):617-620(in Chinese). |
[3]
|
HUANG T L,ZHENG G,WANG N N.Count technology for particulate condition in indoor air[J].Journal of Applied Optics,2000,21(2):17-21(in Chinese). |
[4]
|
BIAN B M,HE A Zh,WU D L.Reflexive speckle image of the point light source in the laser airborne particle counter for 0.1μm and its processing[J].Journal of Optoelectronics·Laser,1997,8(4):246-250(in Chinese). |
[5]
|
LIANG Ch L,HUANG H J,REN B Q,et al.Study of miniature optical sensor for laser particle counter[J].Acta Optica Sinica,2005,23(9):1260-1264(in Chinese). |
[6]
|
YANG L,CHENG X F,BIAN B M,et al.The study of transmission of light scattering signal of parcles[J].Journal of Optoelectronics·Laser,2000,11(1):89-91(in Chinese). |
[7]
|
YANG J,GU F,BIAN B M,et al.The study of signal transmission characteristic in airborne particle counter[J].Laser Technology,2008,32(3):255-258(in Chinese). |
[8]
|
FERRI F,RIGHINI G,PAGANINI E.Inversion of low-angle elasticlight-scattering with a new method devised by modification of the Chahine algorithm[J].Appl Opt,1997,36(30):7539-7550. |
[9]
|
WANG Y W.The study of the measurement method and theory for the dimension of particles[D] .Nanjing:Nanjing University of Science and Technology,2000:52-63(in Chinese). |
[10]
|
YANG J,GU F,BIAN B M.Relation between light-intensity's uniformity and standard particle signal distribution[J].Infrared and Laser Engineering,2007,36(s1):405-409(in Chinese). |
[11]
|
GU F,YANG J,BIAN B M.A model for aerosol mass concentration using an optical particle counter[J].Chinese Optics Letters,2008,6(3):214-217. |
[12]
|
YANG J,PENG G,GU F.Design of performance optimization for optical sensor in laser airborne particle counters[J].Instrument Technique and Sensor,2008(4):59-61(in Chinese). |
[13]
|
SHI Y Sh,XU X R.Fluid mechanics[M].Beijing:Science Press,2005:110-112(in Chinese). |
-
-
Proportional views
-