基于散斑干涉的瞬态温度场重建系统研究  

Study on Reconstruction Systemof Transient Temperature Field based on Speckle Pattern

作　　者：赵迎[1] 于玥[1] 王美娇[1] 

机构地区：[1]长春理工大学光电信息学院,长春130000

出　　处：《激光杂志》2017年第12期26-29,共4页Laser Journal

基　　金：国家自然科学基金(60637010);总装国防科技基金(9140C120402120C12055)

摘　　要：为了可以实时地获取被测表面的瞬态温度变化信息,设计了一种基于时域散斑干涉技术的瞬态温度场重建系统。由于瞬态温度改变导致被测表面的形变,故对于被测表面中的任意一点而言,该一维时域干涉信号与其形变量存在函数关系,所以可通过对单点反射光的相位解调反演该点的温度变化。实验采用550.0nm激光器垂直照射被测表面,采用HS-4型高速CCD相机获取高时间分辨率的散斑干涉图像,被测物为钢构件,其内部放置燃烧部模拟火炮发射时产生的瞬态高温变化。结果显示,单点的灰度数据变化经滤波降噪处理后可以有效地解调反射光相位信息,从而求解被测表面上任意点的温度值。最终实现被侧面瞬态温度场分布的重建,并给出了在t=0.20s时刻的温度分布图像,验证了其可行性。In order to obtain the transient temperature change information of the measured surface in real time, the reconstruction system of transient temperature field was designed based on time-domain speckle pattern interferometry. The changes in temperature can lead to the corresponding deformation, so its one-dimensional time-domain interference signal and its deformation is a function of the relationship for any point in the surface, so it is possible to invert the temperature change of the spot by demodulating the phase of the single-point reflected light. In the experiment, 550. 0nm laser was used to irradiate the surface. The HS-4 high-speed CCD camera was used to obtain the speckle interference image with high temporal resolution. The internal combustion unit is used to simulate transient high tem- perature changes such as gun firing. Experimental results show that the single-point gray-scale data variation can effectively demodulate the reflected light phase information alter filtering noise reduction processing, to solve the temperature value of any point on the measured surface. The temperature distribution image was given at time t = 0. 20 s, thus the feasibility of this method is verified.

关 键 词：瞬态温度场 散斑干涉 相位解调 温度场重建 

分 类 号：O436[机械工程—光学工程]