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Dispersion medium multi-radiation characteristic parameter synergistic reconstruction method based on multi-angle scattered light signal optimal selection

A technology of dispersive medium and radiation characteristics, applied in the field of dispersive medium radiation characteristics measurement, can solve the problems of increasing experimental cost and calculation time, and achieve the effect of saving experimental cost, facilitating theoretical solution, and improving measurement accuracy

Active Publication Date: 2018-06-12
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

However, studies have shown that blindly increasing the measurement angle can improve the inversion accuracy to a certain extent, but it will also increase the experimental cost and calculation time

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  • Dispersion medium multi-radiation characteristic parameter synergistic reconstruction method based on multi-angle scattered light signal optimal selection
  • Dispersion medium multi-radiation characteristic parameter synergistic reconstruction method based on multi-angle scattered light signal optimal selection
  • Dispersion medium multi-radiation characteristic parameter synergistic reconstruction method based on multi-angle scattered light signal optimal selection

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Embodiment Construction

[0038] The present invention will be further explained below in conjunction with the accompanying drawings.

[0039] Step 1, assuming arbitrary values ​​of the parameters to be measured (that is, medium absorption coefficient α, scattering coefficient σ, and scattering phase function Φ), construct a radiation transfer model for a steady-state laser incident on a diffuse medium, and use the finite volume method to solve the steady-state radiation transfer Equation to obtain the scattering signal intensity I(x,θ) at any position x in the calculation domain of the dispersed medium in the θ direction.

[0040] Step 2. Based on the sensitivity analysis method, under different measurement angles, analyze the sensitivity of the simulated scattering signal to the slight change of the parameters to be measured (that is, the medium absorption coefficient α, the scattering coefficient σ, and the scattering phase function Φ) with any value , to obtain the measurement angle interval [θ 1 ...

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Abstract

The invention provides a dispersion medium multi-radiation characteristic parameter synergistic reconstruction method based on multi-angle scattered light signal optimal selection. The method comprises the following steps: simulating the radiative transfer process of a steady-state laser entering a dispersion medium; performing optimal screening on the simulated scattered signals based on a sensitivity analysis and a principal component analysis; obtaining a measurement angle corresponding to an analog signal containing more radiation characteristic informations of the dispersion medium; irradiating one side surface of the dispersion medium by using the steady-state laser; measuring, with a detector, the strength of the scattered signal of the other side surface of the dispersion medium inthe optimal measurement angle direction; finally, synergistically reconstructing a plurality of the multi-radiation characteristic parameters of the dispersion medium by combining the obtained scattered measurement signals with an inverse problem solving technology. The method provided by the invention is a quick and accurate method for studying thea plurality of multi-radiation characteristic parameters of the dispersion medium, and is of great significance to the aerospace, the national defense and the civil industry.

Description

technical field [0001] The invention relates to a cooperative reconstruction method of multiple radiation characteristic parameters of a dispersed medium based on optimal selection of multi-angle scattered light signals, and belongs to the technical field of radiation characteristic measurement of a dispersed medium. Background technique [0002] Dispersed media widely exist in the fields of energy and power, aerospace, metallurgy and chemical industry, such as high-temperature gas in the combustion chamber of aeroengines, fly ash flames containing carbon black in power plant boilers, plume flames containing condensed phase metal oxides injected by solid rocket engines, etc. A variety of radiation characteristic parameters of the dispersed medium reflect the heat transfer and optical characteristics of the medium, which is of great guiding significance for the study of the heat transfer characteristics of the aero-engine combustor, the quality control of industrial products, ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/39
CPCG01N21/39
Inventor 贺振宗毛军逵梁栋韩省思梁凤丽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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