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Method for calculating spectral emissivity and true temperature

A technology of spectral emissivity and real temperature, applied in radiation pyrometry, optical radiation measurement, measuring devices, etc., can solve problems such as difficulty in determining the relationship between spectral emissivity and wavelength function, inaccurate inversion results, etc., and achieve calculation accuracy high effect

Inactive Publication Date: 2015-11-11
SHANGHAI UNIV OF ENG SCI
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Problems solved by technology

However, in the actual measurement process, it is often difficult to determine the functional relationship between spectral emissivity and wavelength, resulting in inaccurate inversion results

Method used

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  • Method for calculating spectral emissivity and true temperature
  • Method for calculating spectral emissivity and true temperature
  • Method for calculating spectral emissivity and true temperature

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the following embodiments will specifically illustrate a method for calculating spectral emissivity and real temperature of the present invention in conjunction with the accompanying drawings.

[0018] In this embodiment, a method for calculating the spectral emissivity and real temperature is a calculation method for calculating the spectral emissivity and real temperature of the illuminant to be tested, especially a high-temperature illuminant to be tested. In this calculation method, a multispectral pyrometer and a spectrometer are used.

[0019] The multispectral thermometer has multiple channels, and all the channels are used to receive light of different wavelengths, so that the brightness temperature of the light received in each channel can be obtained. Here, brightness temperature means that when the temperature of an object is actual...

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Abstract

The invention provides a method for calculating spectral emissivity and true temperature. A multi-spectral thermodetector is adopted for measuring the spectral emissivity and the true temperature of a luminous body to be measured. The method comprises the steps that 1, an optical splitter is adopted for dividing light emitted by the luminous body to be measured into multiple ways of light with different wavelengths; 2, multiple channels of the multi-spectral thermodetector receive the light of the corresponding ways, so that the brightness temperature of the light of each way is obtained; 3, the relation expression between the brightness temperature measured by each channel and the true temperature is obtained on the basis of the preset rule, please see the relation expression in the description, Ti represents the brightness temperature of the i channel, T represents the true temperature, Lambada i represents the wavelengths of split beams received by the i channel, C2 represents a second radiation constant, and Epsilon(Lambada i, T) represents the spectral emissivity of the i channel; 4, the iteration cut-off condition is obtained on the basis of the temperature relation expression and the preset conversion rule, and please see the iteration cut-off condition in the description; 5, based on a gradient projection method and the spectral emissivity value ranging from 0 to 1, the spectral emissivity and the true temperature are calculated.

Description

technical field [0001] The invention relates to a method for calculating the spectral emissivity and the real temperature which can calculate the real temperature and spectral emissivity of the luminous body to be measured without assuming the functional relationship between the spectral emissivity and the wavelength. Background technique [0002] Multi-spectral radiation temperature measurement technology is a non-contact temperature measurement technology based on the detection and analysis of thermal radiation of the target to be measured. This technology is based on Planck's law, according to the multi-spectral radiation information of the target to be measured, and uses related algorithms to realize the simultaneous measurement of real temperature and spectral emissivity. According to the theory of multi-spectral radiation temperature measurement, the equations established by using Planck's formula to solve the temperature belong to the underdetermined equations (the nu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J5/00
Inventor 邢键吴飞邓琛孔勇
Owner SHANGHAI UNIV OF ENG SCI
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