Insulation Structure Design Of Camera Device Based On Ultra Low Temperature Environment

At present,the space camera device has developed into one of the most important components in the space mission.After many years of research,the development of space camera devices in the conventional environment has become more and more mature.However,with the continuous expansion of space optical equipment applications,the demand for space camera devices in extreme environments is increasing day by day.In the extreme working conditions of the space camera,temperature is the key factor affecting the optical system.Low temperature will cause the deformation of optical elements and produce additional aberrations,which will affect the imaging quality of the imaging device and even fail to work properly.Therefore,thermal analysis and reasonable insulation measures are the key technologies for the design of space camera.In this paper,the research object is the aerospace camera device used in the liquid oxygen tank.Its low temperature and strong oxidation are the focus of the research.The thermal insulation technology of the camera in the low temperature environment is studied by the combination of active thermal control and passive thermal control.This paper analyzes the influence of cryogenic environment on the imaging of space camera device,and summarizes the research status of the insulation technology of camera device at home and abroad.The thermal analysis,vibration analysis and pressure analysis were performed on the application environment of the camera device,and the theoretical analysis model of the camera device in a low temperature environment was established.According to the requirements of the technical indicators,the initial insulation plan of the camera device is established,and the material and key parts of the imaging device are designed in detail.The thermal design of optical window is carried out according to the Thermal-structural-optical integrated analysis,and the thickness of optical window is determined.ANSYS Workbench software is used to perform thermal analysis on the finite element model,and a detailed calculation method for the thickness and heating power of the insulation layer is summarized.The dynamic temperature change of the complete machine is statistically analyzedThe structure analysis model is established according to the thermal design scheme.In order to ensure that the camera device meets the requirements of the mechanical field on the premise of meeting the temperature field,the dynamic analysis of the finite element model of the camera is carried out.The topological optimization method is used to design the support structure of the lens in detail,and its optimal structure distribution form is determined.The results of the whole model analysis of the imaging device are summarized,and the rationality of the design results is verified.The low temperature test under the ground liquid nitrogen environment is carried out on the camera.The thermal insulation performance of the camera under the ultra low temperature environment is verified.The test results show that the camera is maintained at-40?~+60? for a long time,and it can obtain a clear imaging effect and meet the design requirements.