Method and device for reconstructing space temperature field based on target surface temperature distribution

Abstract

The invention discloses a method and a device for reconstructing a space temperature field based on target surface temperature distribution. A space unit radiation and convection energy balance equation set is built according to a local energy flow balance principle, a space thermal radiation energy absorption distribution random number is determined through a Monte-Carlo simulation method, and key parameters of space unit radiation absorption; space velocity field distribution is simulated through a computational fluid dynamics method, and space unit convection distribution parameters are provided; the target surface temperature is measured through an infrared temperature measurement device, and boundary conditions for equation solving are provided; and the radiation and convection energy balance equation set is solved so as to build a space temperature field. The method and the device provided by the invention can solve a technical problem of real-time reconstruction of the space temperature field, and engineering applications of the space temperature field are realized.

Description

technical field [0001] The invention relates to a space temperature field reconstruction method and device based on target surface temperature distribution, belonging to the field of temperature detection, especially the technical field of space temperature field monitoring of heating furnaces in related industries such as metallurgy, chemical industry, petrochemical industry, and nonferrous metals. Background technique [0002] At present, due to the lack of accurate, stable and reliable detection methods in domestic metallurgy, chemical industry, petrochemical industry and non-ferrous metals, etc., they mainly rely on thermocouples, artificial temperature measurement guns and other temperature measurement, with scarce data, lack of real-time and continuity, And the accuracy and reliability are not high, especially the overall distribution of the temperature field cannot be measured, resulting in the inability to realize the fine control of the heating furnace operation proc...

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Problems solved by technology

[0005] The literature "Simulation Research on Three-dimensional Visual Monitoring Method of Furnace Combustion Temperature Field" provides a method of using the Monte-Carlo method to simulate the absorption distribution of thermal radiation energy with random numbers, and obtain the real-time spatial three-dimensional temperature field distribution by solving the radiation transfer equation. However, the literature The color CCD sensor imaging used in the paper is mainly considered to meet the light stimulation requirements of the human eye. It is not specially designed for high-temperature object measurement applications, and the detection accuracy is not high. In addition, this document did not consider the influence of convective heat transfer when constructing the space temperature field, resulting in space temperature Calculation accuracy and reliability are not fully guaranteed

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