A method for determining the colorimetric wavelength of radiation temperature measurement in water vapor medium environment
A technology of radiation temperature measurement and determination method, which is applied in the field of radiation temperature measurement, can solve the problems that there is no wavelength determination method, it is difficult to obtain accurate and reliable temperature, etc., and achieve the effect of accurate and reliable temperature measurement and sufficient theoretical basis
Active Publication Date: 2020-12-08
SHANGHAI MEISHAN IRON & STEEL CO LTD
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Problems solved by technology
However, for radiation temperature measurement in environments with different concentrations of water vapor, it is difficult to obtain accurate and reliable temperature without a scientific wavelength determination method.
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[0029] The method for determining the colorimetric wavelength of radiation temperature measurement in a water vapor medium environment in this embodiment includes the following steps: first, the relevant parameters of the temperature measurement environment need to be determined, mainly including: temperature distribution, concentration distribution, pressure distribution of water vapor, and a thermometer The distance to the measured object, the temperature and emissivity of the measured object and the surrounding environment;
[0030] (1) Based on the high-temperature spectral database HITEMP2012, in the Malkmus statistical narrow-band model, the average gas transmittance of the isothermal and uniform path bands for:
[0031]
[0032] where X is the mole fraction of water vapor on the channel, L is the thickness of the water vapor medium layer, and p is the water vapor pressure; and are the average absorption coefficient in the spectral band, the average spectral line...
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The invention relates to a method for determining a colorimetric wavelength of radiation temperature measurement in a water vapor medium environment. The method comprises the steps of: calculating anaverage gas transmission rate and an average absorption coefficient, then calculating spectral radiation intensity distribution through a radiation transmission equation, and finally obtaining a radiation energy attenuation ratio. According to the method for determining the colorimetric wavelength of radiation temperature measurement in the water vapor medium environment provided by the invention,the radiation characteristics of the water vapor are calculated with the help of the latest high-temperature spectral line spectrum database HITEMP 2012, a heat radiation transmission equation considering the absorption and emission of a water vapor medium is established, and an attenuation ratio of radiant energy caused by the water vapor at each wavelength is solved and obtained; and the optimal wavelength of colorimetric temperature measurement is scientifically determined by comparing the attenuation ratios at various wavelengths.
Description
technical field [0001] The invention relates to a method for determining the colorimetric wavelength of radiation temperature measurement in a water vapor medium environment, and belongs to the technical field of radiation temperature measurement. Background technique [0002] The monitoring of the surface temperature of the continuous casting slab is of great significance for optimizing the continuous casting process control and improving the surface quality of the slab. Real-time online billet surface temperature monitoring can provide important information for closed-loop control of secondary cooling water, billet solidification and forecasting of billet quality. At present, the measurement of the surface temperature of the slab in the second cooling zone of continuous casting mainly adopts the radiation thermometry method. However, due to the use of a large amount of cooling water in the secondary cooling zone, the accurate measurement of the surface temperature of the ...
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IPC IPC(8): G01J5/60
CPCG01J5/601
Inventor 倪修华张发斌龙木军黄云伟江中块陈登福李玉娣
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD