高温高速数字图像测量方法及氧化烧蚀实验研究

High-temperature oxidation and ablation is a hot and difficult issue in thermal protection of inside and outside flow aerospace. At present, complex high temperature environment and some other elements have seriously restricted the test method and technology, such as convection current, optical radiation, physical and chemical reaction of Materials and so on. The traditional measurement method with interference and non - interference optical is faced with many challenges such as air refractive index changes, optical jitter and "annealing effect", Which made it very difficult to measure temperature and deformation simultaneously.In this project, synchronous measurement method of deformation and temperature of oxidation and ablation will be studied combining high-speed photography and optical high temperature measurement method and using digital image processing. In addition, the dynamic process of oxidative ablation and the technology of online testing and quantitative characterization will also be researched. The specific research include three aspects as followed: the deformation measurement accuracy will be improved through the combination of image local invariant feature and deformation measurement; a temperature - deformation measurement method and device by using digital image processing technology; the rapid processing of massive image data will realize with GPU and multi-core CPU technology.Through the above systematic study, by analyzing the mechanical property and failure mechanism oxidation and ablation materials, we can provide technical support for thermal protection problem.

高温氧化烧蚀是航天内外流热防护的重点和难点之一，然而由于其复杂的高温环境，对流、光辐射、材料自身物理化学反应等因素严重制约了当前的测试方法和手段。传统的干涉与非干涉光学测量方法面临着空气折射率变化、光路抖动、"退相关效应"等挑战，难以实现温度和变形的同步测量。本项目将高速摄像技术与高温光学测量方法相结合，利用数字图像处理，研究材料氧化烧蚀的变形与温度同步测量方法，发展氧化烧蚀过程的动态、在线测试和定量表征的技术，具体研究内容为：将图像局部不变特征与变形测量相结合，以提高变形测量的精度；结合数字图像处理技术，发展一套温度-变形同步测量方法和装置；通过GPU与多核CPU技术实现海量图像数据的快速处理。通过以上系统的研究，分析氧化烧蚀材料的力学性能和破坏机理，为热防护问题研究提供技术支撑。

高温氧化烧蚀是航天内外流热防护的重点和难点之一，然而由于其复杂的高温环境，对流、光辐射、材料自身物理化学反应等因素严重制约了当前的测试方法和手段。传统的干涉与非干涉光学测量方法面临着空气折射率变化、光路抖动、“退相关效应”等挑战，难以实现温度和变形的同步测量。.本项目将高速摄像技术与高温光学测量方法相结合，利用数字图像处理，研究材料氧化烧蚀的变形与温度同步测量方法，发展氧化烧蚀过程的动态、在线测试和定量表征的技术，具体研究内容为：将图像局部不变特征与变形测量相结合，以提高变形测量的精度；结合数字图像处理技术，发展一套温度-变形同步测量方法和装置；通过 GPU与多核 CPU技术实现海量图像数据的快速处理。.通过以上系统的研究，分析氧化烧蚀材料的力学性能和破坏机理，为热防护问题研究提供技术支撑。