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Peculiarities of data processing for optical measurements of disperse parameters of bimodal media

A.A. Zhirnov1, O.B. Kudrjashova1

1 Institute for Problems of Chemical and Energetic Technologies of the Siberian Branch of the Russian Academy of Sciences, Biysk, Russia

 PDF, 1050 kB

DOI: 10.18287/2412-6179-2019-43-4-692-698

Pages: 692-698.

Full text of article: Russian language.

Abstract:
This study is focused on enhancing the informativity of optical measurement techniques for particulate matter. The problem is that the description of particulate matter with bimodal and multimodal distributions by an a priori defined analytical function of particle size distribution (for example, a log-normal distribution) is not accurate enough. Here, we explore if experimental data can be approximated by a multivariable function of particle size distribution instead of using the a priori defined log-normal distribution. For the comparison of the approximation results, experiments are conducted on standard samples with granulometric compositions OGS-01LM and OGS-08LM separately and jointly in a mix. The experimental data are recorded by a high-selectivity turbidimetric technique in water suspensions of these samples.
      The purpose of this study is to present the measurement results as a distribution function that enables one to identify more accurately the particle-size distribution profile and the corresponding disperse characteristics of the aerosol in question when measuring parameters of disperse media by optical techniques.
      The main objective of this work is to develop, implement and verify a search algorithm for the particle-size distribution function by way of a multi-parameter function. We show that the solution to the problem proposed herein is more universal because it allows slow and fast processes in suspensions and aerosols to be examined with a lower error. The algorithm can be applied to the problems which are based on solving first-kind Fredholm equations.

Keywords:
aerosols, turbid media, nondestructive testing, remote sensing and sensors, optical method, monodisperse polystyrene latex, turbidimetric technique, log-normal distribution, multivariable function, Sauter mean diameter

Citation:
Zhirnov AA, Kudrjashova OB. Peculiarities of data processing for optical measurements of disperse parameters of bimodal media. Computer Optics 2019; 43(4): 692-698. DOI: 10.18287/2412-6179-2019-43-4-692-698.

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