【摘要】 设计和研制了面向-196℃到+100℃全温区高低温工作环境的紧凑型摄像监视系统,采用真空绝热、热桥阻断和主动加热或冷却等绝热保温措施,实现了系统在目标温度范围内正常工作。当外部环境为低温工况时,在设备自身产热的基础上,调节内部电加热膜片进行热量补偿;当外部为高温工况时,通过持续进出的常温干燥氮气冷却摄像核心器件。两者可连续切换。对所设计的高低温摄像系统进行了漏热理论计算并对其实际耐高低温性能进行实验研究,结果表明该系统可胜任-196—+100℃高低温工作任务,内部感光器件表面的实际温度可控制在-30—+50℃之间。更多还原

【Abstract】 The design and experimental study of a high-low temperature visualization system working in-196 ℃ to +100 ℃ was presented,in which the technologies were integrated,integrating technologies such as vacuum insulation,multilayer insulation and thermal conduction reduction.Under cryogenic environment,heat compensation was provided by a thin film electrical heater and the Joule heat of the camera.For high ambient temperature application,dry nitrogen at room temperature flows through the inner space continuously to cool down the camera.The two modes could be switched consecutively.Illumination was also integrated into the visualization system.Theoretical calculation and experiment show that the system can competent for the desired task with the surface temperature of camera controlled from-30 ℃ to +50 ℃.更多还原