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Simultaneous reconstruction method for spherical particle optical constant and particle system particle size distribution based on forward scattering multi-angle measurement

A technology of optical constants and spherical particles, applied in the field of physical parameter measurement of spherical particles, can solve the problems of inaccurate measurement results and inability to obtain measurement results at the same time

Active Publication Date: 2015-12-30
HARBIN INST OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that in the existing conventional method for measuring the optical constant of spherical particles and the particle size distribution of the particle system, the measurement results of the two cannot be obtained at the same time, and the measurement results are inaccurate. Simultaneous reconstruction method of angularly measured optical constants and particle size distributions of spherical particles

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  • Simultaneous reconstruction method for spherical particle optical constant and particle system particle size distribution based on forward scattering multi-angle measurement
  • Simultaneous reconstruction method for spherical particle optical constant and particle system particle size distribution based on forward scattering multi-angle measurement
  • Simultaneous reconstruction method for spherical particle optical constant and particle system particle size distribution based on forward scattering multi-angle measurement

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specific Embodiment approach 1

[0038] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the simultaneous reconstruction method of spherical particle optical constant and particle size distribution based on forward scattering multi-angle measurement described in this embodiment, it includes the following steps:

[0039] Step 1: Fill the particles to be tested with the same concentration into a thickness of L 1 The first sample container is inside and the thickness is L 2 in the second sample container, so that the sample particles to be tested in the two sample containers are in a suspended state;

[0040] Step 2: Use the wavelength as λ 1 The continuous laser light vertically irradiates the left side surface of the first sample container along the thickness direction of the first sample container, and is incident on the sample particle system to be measured in the first sample container, and then along the right side of the first sample container Surface trans...

specific Embodiment approach 2

[0061] Specific implementation mode 2: This implementation mode further explains the implementation mode 1, and the inverse problem in step 4 and step 7 is realized by leapfrog algorithm.

specific Embodiment approach 3

[0062] Specific implementation mode three: this implementation mode further explains implementation mode one or two, and the specific method for obtaining the radiation intensity field in the calculation domain in step five is:

[0063]Calculated using the following radiative transfer equation:

[0064] ∂ I ( x , θ ) ∂ x = - ( κ a + κ s ) I ( x , θ ) + κ s 2 ∫ 0 π I ( x , ...

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Abstract

The invention relates to a simultaneous reconstruction method for a spherical particle optical constant and particle system particle size distribution based on forward scattering multi-angle measurement and belongs to the technical field of physical property parameter measurement of spherical particles. The simultaneous reconstruction method aims at solving the problems that in an existing conventional method for measuring a spherical particle optical constant and particle system particle size distribution, the measurement results of the spherical particle optical constant and the particle system particle size distribution can not be obtained simultaneously, and the measurement results are not accurate. In the measurement process, two continuous lasers with different wavelengths are used for irradiating the surface of a spherical particle system sample, transmission signals of a particle system in different angles are measured through a detector, and finally the optical constant and the particle size distribution situation of the particle system are indirectly obtained through the inverse problem solving technology. According to the simultaneous reconstruction method, a direct problem and an inverse problem solving model of measurement of the transmission signals of the spherical particle system in different angles is established, and the simultaneous reconstruction technology of the optical constant and the particle system particle size distribution is proposed under the premise that other parameters of the particle system are given. The simultaneous reconstruction method is used for simultaneous reconstruction of the spherical particle optical constant and the particle system particle size distribution.

Description

technical field [0001] The invention relates to a simultaneous reconstruction method of spherical particle optical constants and particle size distribution based on forward scattering multi-angle measurement, and belongs to the technical field of physical parameter measurement of spherical particles. Background technique [0002] Granular systems are ubiquitous in nature and in industrial production. It involves petrochemical, biopharmaceutical, building material production, infrared detection, satellite remote sensing and many other fields. The radiation properties of particles, such as optical constants, scattering coefficients, and absorption coefficients, all directly affect the basic process of radiation transmission. Therefore, it is particularly important to solve the optical constants of the particles. The particle size distribution of the particle system is also one of its important parameters and technical indicators, which is closely related to the efficient use...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N15/02
Inventor 任亚涛齐宏史要涛于创利于翠萍阮立明谈和平
Owner HARBIN INST OF TECH
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