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Black body emissivity measuring device based on control background radiation, and black body emissivity measuring method based on control background radiation

A measuring device and technology of background radiation, applied in the field of blackbody emissivity measuring device, can solve the problems of affecting calibration accuracy, changing blackbody emissivity, aging and degeneration of spaceborne calibration blackbody work, etc.

Inactive Publication Date: 2015-08-12
NAT INST OF METROLOGY CHINA
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AI Technical Summary

Problems solved by technology

There are currently no measures for on-orbit measurement and calibration
During the satellite’s in-orbit operation, the spaceborne calibration blackbody may be damaged by cosmic ray irradiation or aging and denaturation after long-term work, which may change the emissivity of the blackbody, thereby affecting the accuracy of calibration.

Method used

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  • Black body emissivity measuring device based on control background radiation, and black body emissivity measuring method based on control background radiation
  • Black body emissivity measuring device based on control background radiation, and black body emissivity measuring method based on control background radiation
  • Black body emissivity measuring device based on control background radiation, and black body emissivity measuring method based on control background radiation

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Embodiment Construction

[0022] In order to facilitate the understanding of the present invention, the embodiments of the present invention will be described below in conjunction with the accompanying drawings. Those skilled in the art should understand that the following description is only for the convenience of explaining the present invention, not as a specific limitation on its scope.

[0023] Such as figure 1 Shown is a schematic diagram of the influence of the thermal radiation ring on the blackbody background radiation, wherein the radiation of the blackbody 1 to be measured and the radiation of the thermal radiation ring 2 are reflected to the infrared radiation thermometer 4 by the blackbody 1 to be measured, and the measurement principle is as follows:

[0024] For an ideal blackbody radiation source with an infinitely small opening, its spectral radiance can be calculated by Planck’s blackbody radiation law, as shown in formula (1):

[0025] B λ ...

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Abstract

The present invention discloses a black body emissivity measuring device based on control background radiation, and a black body emissivity measuring method based on control background radiation. The measuring device comprises a to-be-measured black body; a heat radiation ring located at one side of an opening of the to-be-measured black body; and an infrared radiation thermometer for measuring an acquired radiation signal. A water cooling diaphragm is arranged between the heat radiation ring and the infrared radiation thermometer, and is used to reduce the stray radiation. The black body emissivity measuring device based on the control background radiation analyzes the influence of the temperature change of the heat radiation ring and the black body on a measurement result, and verifies the feasibility of the method applied to the spaceborne calibration black body emissivity on-orbit calibration.

Description

technical field [0001] The invention relates to a black body emissivity measurement device and method, in particular to a black body emissivity measurement device and method based on controlling background radiation. Background technique [0002] Infrared remote sensing is one of the important detection means of the earth observation system, and it plays an important role in many fields such as homeland security, disaster prevention and reduction, environmental monitoring, weather forecast and climate change monitoring. Due to the low stability of the infrared remote sensing payload during its orbital operation, it is necessary to use the spaceborne calibration system for continuous calibration. A high-precision spaceborne calibration system plays a decisive role in maintaining a high quantitative and stable observation level of infrared remote sensing payloads. The spaceborne calibration system generally uses one or two spaceborne blackbodies to calibrate high and low temp...

Claims

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Application Information

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IPC IPC(8): G01J5/00
Inventor 郝小鹏宋健原遵东刘曾林许敏
Owner NAT INST OF METROLOGY CHINA
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