Measuring method of solar absorptance of thermal control coating

Abstract

The invention relates to a measuring method of the solar absorptance of a thermal control coating, which is characterized in that the heat measuring method is used for obtaining the optical performance of the thermal control coating. The method comprises the following steps: firstly, uniformly applying the thermal control coating on a thin metal test piece plate capable of measuring the temperature at real time; multiplying the solar absorptance of the thermal control coating by the irradiation heat for calculating the irradiation flux absorbed by the thermal control coating; then, measuring the temperature of the thermal control coating at real time, and calculating and obtaining the heat radiated by the thermal control coating to the space according to the Stefan-Boltzmann law; and analyzing and calculating each kind of heat loss in the space environment of the thermal control coating through the test piece plate, and calculating and obtaining the solar absorptance of the thermal control coating according to the principle of conservation of energy. The method calculates the solar absorptance of the thermal control coating through testing the temperature of the thermal control coating, so a detector with the detection precision of 0.1 degree is selected, and the precision of the calculated solar absorptance of the thermal control coating can reach 0.001.

Description

technical field [0001] The invention relates to a method for measuring the solar absorptivity of a thermal control coating, which can be applied to the on-orbit test of the thermal control coating in the outer space environment and the in-situ test of the simulated space environment on the ground, and belongs to the space radiation of the thermal control coating of the aerospace industry The test method field. Background technique [0002] The thermal control coating of the spacecraft will be subjected to various environmental factors such as atomic oxygen, solar electromagnetic radiation, ionosphere, earth radiation belts, solar cosmic rays, and plasma during its service in orbit. Space environmental factors cause thermal control coatings, etc. The performance degradation of satellite key materials is an important cause of spacecraft failure and even accidents. The degradation of the performance of exposed materials such as thermal control coatings is generally manifested ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring solar absorptivity of thermal control coatings, so as to overcome the defects of partial recovery of degraded thermal control coating performance and low measurement accuracy in existing thermal control coating solar absorptivity measurement methods , and aiming at the problem that the current measurement method cannot realize the on-orbit test of the solar absorptivity of the thermal control coating, a measurement method of the solar absorptivity of the thermal control coating with simple structure and convenient measurement is constructed

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