System and method for measuring effective emissivity of metal solidifying point black body based on radiant quantity measurement

A metal solidification and measurement system technology, applied in the field of optical metrology, can solve the problems that the actual value of the effective emissivity of the blackbody at the solidification point cannot be obtained, and the emissivity of the blackbody at the metal solidification point cannot be detected, etc., achieving high measurement accuracy and wide application prospects.

Active Publication Date: 2016-10-26
西安应用光学研究所
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Problems solved by technology

[0004] But so far, the emissivity of metal solidification point blackbody cannot be detected, and can only be calculated according to the cavity structure, cavity material and cavity coating mater

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  • System and method for measuring effective emissivity of metal solidifying point black body based on radiant quantity measurement
  • System and method for measuring effective emissivity of metal solidifying point black body based on radiant quantity measurement
  • System and method for measuring effective emissivity of metal solidifying point black body based on radiant quantity measurement

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[0021] The present invention will be described below in conjunction with specific embodiments:

[0022] At present, the emissivity of the metal freezing point black body cannot be detected, and can only be calculated based on the cavity structure, cavity material and cavity coating material. Since the actual value of the effective emissivity of the freezing point black body cannot be obtained, the measurement work band of the black body emissivity parameter Unpredictable uncertainty. With the development of cryogenic radiometer technology, for example, the new generation CryoRad-Ⅲ cryogenic radiometer system newly developed by NIST in the United States has a response wavelength range of 0.2μm-25μm, a receiver responsivity greater than 2K / mW, and a minimum dynamic range of 1μW-1mW. The uncertainty is less than 0.005%, so that the radiation of the detector can reach the infrared band. Therefore, the present invention is based on the idea of ​​using a cryogenic radiometer as the hi...

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Abstract

The invention discloses a system and method for measuring effective emissivity of a metal solidifying point black body based on radiant quantity measurement, belonging to the optical measurement field. The method is characterized by comprising the steps of firstly calibrating a silicon trap detector by virtue of a low-temperature radiometer, forming relatively stable and uniform laser beams by combining a tunable laser source, a laser stabilization power controller and an integrating sphere, collimating the uniform laser beams by virtue of a collimating lens, respectively receiving and measuring the collimated laser beams by virtue of an infrared filtering radiometer and the silicon trap detector, calibrating the absolute responsivity of the infrared filtering radiometer under a specific wavelength by virtue of a radiation contrast method, precisely measuring the spectral radiance flux of the solidifying point black body at a temperature ground section by virtue of the calibrated infrared filtering radiometer, and calculating the emissivity of the solidifying point black body by virtue of the measured radiance flux and the temperature of the solidifying point black body, wherein the temperature of the solidifying point black body working at the temperature ground section is a constant value. By virtue of the method, the current measurement problem of the effective emissivity of the solidifying point black body is solved. The method has the characteristics of high measurement accuracy and wide application prospects.

Description

technical field [0001] The invention belongs to the field of optical metrology, and mainly relates to a method for measuring the effective emissivity of a metal solidification point black body, in particular to a system and method for measuring the effective emissivity of a metal solidification point black body based on radiation measurement. Background technique [0002] In recent years, infrared technology has developed by leaps and bounds, and has been widely used in many fields such as industry, medical treatment, national defense, information science, biotechnology, etc., and has penetrated into all aspects of people's lives, such as temperature measurement of molten steel and steel ingots , hot junction detection, aircraft landing aids, high-voltage circuit temperature detection, thermal leak detection, non-contact measurement of human body temperature, small temperature difference detection of loose rocks in coal mines, etc., the black body radiation source is used as ...

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Application Information

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IPC IPC(8): G01N21/27
CPCG01N21/274
Inventor 岳文龙于东钰黎高平谢毅桑鹏李四维
Owner 西安应用光学研究所
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