Thermal-insulating device of thermal control system of aerial camera

Abstract

The invention relates to a thermal-insulating device of a thermal control system of an aerial camera. The thermal-insulating device comprises three stainless steel bolts and three thermal-insulating gaskets, which are symmetrically distributed along the axial direction, wherein a circular thermal-insulating pad is arranged between a first structure element and a second structure element; the thermal-insulating gaskets are arranged between an annular surface of each stainless steel bolt and a plane of the first structure element; the thermal-insulating gaskets, the first structure element, the thermal-insulating pad and the second structure element are fixedly connected through the stainless steel bolts; three symmetrically distributed bosses respectively extend from the first end face and the second end face of the thermal-insulating pad; the surfaces of three bosses at the first end face contact the plane of the first structure element; the surfaces of three bosses at the second end face contact the plane of the second structure element; a connection section of the stainless steel bolts penetrates through a through hole at the center of each boss; the boss structure is used for increasing the heat resistance and the contact heat resistance of the thermal-insulating pad; the heat of the first structure element is isolated through the thermal-insulating pad and the thermal-insulating gaskets; the heat is prevented from being directly transmitted to the second structure element from the first structure element; and the heat is also prevented from being conducted through the stainless steel bolts.

Description

technical field [0001] The invention relates to a thermal insulation structure of an aerial camera thermal control system, which is suitable for the thermal control field of aerospace equipment. Background technique [0002] Aerial cameras are precision optical instruments mounted on aircraft to capture ground objects by taking pictures of the surface. For cameras working at high altitudes, the ambient temperature will change greatly from the ground to the high altitude. Due to the thermal instability of optical materials and structural materials, temperature changes may cause the system to defocus, resulting in wavefront distortion, resulting in imaging The quality deteriorates. In order to meet the high-resolution requirements of aerial cameras, certain thermal control measures must be taken to ensure high-quality images. [0003] Thermal control measures include passive thermal control and active thermal control. Generally, the thermal control system is designed accordi...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems of reducing the thermal resistance of the heat insulation structure due to the high thermal conductivity of the screw connection material in the existing heat insulation structure, and the heat loss of the controlled component is difficult to control, the purpose of the present invention is to provide a thermal control system for aerial cameras The heat insulation device can effectively increase the thermal resistance of the heat insulation structure, reduce the heat leakage rate of the optical system, increase the time constant of the system, and reduce the power consumption of active thermal control

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