Radiometer for performance in-situ test of thermal control coat

Abstract

The invention discloses a radiometer for performance in-situ test of a thermal control coat, which consists of a heat testing cavity, a test piece plate, heat detectors, a test piece plate strut, a heat testing cavity strut, a heat insulation cavity and a data acquisition base, wherein the heat insulation cavity is a test part of the radiometer and is supported by the heat testing cavity strut and placed inside the heat insulation cavity; the surface of the test piece plate is coated with the thermal control coat to be tested, and the test piece plate is supported by the test piece plate strut and placed inside the heat testing cavity; the heat detectors are film heat detectors and placed below the test piece plate and at the bottom of the heat testing cavity respectively; the heat insulation cavity is used for blocking thermal disturbance of spatial irradiation inside the heat insulation cavity; and a signal acquisition board card is placed in the data acquisition base. After the thermal control coat receives the irradiation of a simulated spatial environment, the change of temperature is detected by the heat detector, the change of thermal flux of the coat is obtained according to the change of the temperature, and the change of coat performance is calculated by using the change of the thermal flux. The radiometer has the advantages of simple structure, small time constant and high test precision, and can well realize the performance in-situ test of the thermal control coat in the simulated spatial environment.

Description

technical field [0001] The invention relates to a radiometer for in-situ testing of thermal control coating properties, belonging to the field of space radiation ground simulation testing of aerospace thermal control materials. Background technique [0002] As the design life of my country's satellites increases from 8 years to 15 years, the degradation of the performance of exposed materials such as thermal control coatings will become one of the important factors restricting their long life. The performance degradation of thermal control materials is generally expressed as the ratio of solar absorptivity to emissivity This is the main reason for the temperature rise of the satellite at the end of its life. In order to ensure the stability of satellite thermal control coatings in the space environment, it is necessary to carry out ground simulation experiments on the performance changes of solar absorptivity of thermal control coatings in high vacuum, ultraviolet and part...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a radiometer for in-situ testing of thermal control coating properties, to overcome the shortcomings of existing thermal control coating performance in-situ testing systems such as large structure, low test accuracy, and high test costs. An in-situ test instrument for thermal control coating performance with simple measurement, high precision and no movable parts

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