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Method for synchronous measurement of optical constant and particle size distribution of spherical particles based on multi-angle light scattering-transmission process

A technology of multi-angle light scattering and optical constants, which is applied in the directions of transmittance measurement, scattering characteristic measurement, particle and sedimentation analysis, etc. It can solve the problems of large error in measurement value and weak measurement signal

Active Publication Date: 2017-02-08
黑龙江省工研院资产经营管理有限公司
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Problems solved by technology

[0004] In order to solve the problem of large errors in experimental measurement values ​​and weak measurement signals in the measurement of radiation parameters of participating media based on inverse problem solving, the present invention proposes the optical constant and particle size distribution of spherical particles based on the multi-angle light scattering-transmission method Simultaneous measurement method

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  • Method for synchronous measurement of optical constant and particle size distribution of spherical particles based on multi-angle light scattering-transmission process
  • Method for synchronous measurement of optical constant and particle size distribution of spherical particles based on multi-angle light scattering-transmission process
  • Method for synchronous measurement of optical constant and particle size distribution of spherical particles based on multi-angle light scattering-transmission process

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specific Embodiment approach 1

[0021] Specific embodiments 1. The method for simultaneously measuring the optical constant and particle size distribution of spherical particles based on the light scattering-transmission method described in this embodiment, the specific operation steps of the method are:

[0022] Step 1: Put the particles to be tested at the same concentration into a semi-cylindrical first sample container with a radius r and a second sample container with a thickness L, so that the sample particles to be tested in the two sample containers are in a suspended state ;

[0023] Step 2: Using the wavelength λ, the continuous steady-state laser light vertically irradiates the arc-shaped surface of the first sample container with a radius of r along the diameter direction of the first sample container, and is incident on the to-be-measured surface in the first sample container. The sample particle system, the scattered light is transmitted and output along the arc-shaped surface of the first samp...

specific Embodiment approach 2

[0034] Specific embodiment two, this embodiment will further explain embodiment one, the inverse problem in step 3 and step 6 is realized by the improved quantum particle swarm algorithm, and the improved quantum particle swarm algorithm includes the following steps:

[0035] Step A. Input system control parameters, namely: particle population size N s , the search space of the problem R=[low i , high i ], the maximum number of iteration steps N t , the dimension N of the problem and the maximum tolerance ε allowed by the objective function o the value of; i=1,2,...,N;

[0036] Step B. Using the chaos theory model in the search space R, for each particle position X i Initialize and evaluate the position of each particle and calculate the corresponding objective function F obj (X i ); Then, take the position of the current particle as the optimal position of the individual particle history P i ;Finally, find the particle with the smallest objective function value of the ...

specific Embodiment approach 3

[0046] Specific implementation mode three. This implementation mode further explains the implementation mode one. The specific method for obtaining the radiation intensity field in the calculation domain in step four is:

[0047] The scattered light intensity and spectral hemispherical transmittance were calculated using the following Mie theoretical equation:

[0048] I ( Θ , r ) = N ∫ 0 χ m a x I ( Θ , r , χ ) f ( χ ) d χ

[0049] I ( Θ , r , χ ) = I 0 λ 2 ...

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Abstract

The invention discloses a method for synchronous measurement of the optical constant and particle size distribution of spherical particles based on a multi-angle light scattering-transmission process, relates to the technical field of participating medium radiation property measurement and is aimed at solving the problems of great error of experimental measurement value and relatively weak measurement signal in participating medium radiation parameter measurement based on inverse problem solving. The method comprises the following steps: irradiating the surface of a particle system sample by using continuous steady-state laser; arranging optical detectors on different scattering-angle positions; measuring the scattering optical signal intensity and hemispherical transmission signal of the steady-state laser of different angles; and obtaining the optical constant of the spherical particles and the particle size distribution of the particle system in combination with the signals and through the inverse problem solving technology. The method disclosed by the invention is suitable for synchronous measurement of the optical constant and particle size distribution of spherical particles based on a multi-angle light scattering-transmission process.

Description

technical field [0001] The invention relates to the technical field of participatory medium radiation physical property measurement. Background technique [0002] In industrial production, particle systems generally exist in the radiation heat transfer process of solid fuel rocket tail combustion products, oxidized particles, nano-sized particle semiconductor materials, fluidized bed combustion chamber particles, and fiber materials in insulation materials. During the combustion process of substances inside the power equipment, a large amount of high-temperature gas containing particles will inevitably be produced, and the measurement of the particle size distribution parameters and spectral complex refractive index of the particle system during the combustion process is very important for understanding the internal reaction of the power device and improving the performance index of the power device It is of great significance to reduce the emission of tail particulate pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02G01N21/41G01N21/51G01N21/59
CPCG01N15/0205G01N15/0211G01N21/41G01N21/51G01N21/59
Inventor 张俊友齐宏任亚涛史景文阮立明
Owner 黑龙江省工研院资产经营管理有限公司
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