基于光场分层成像的火焰三维温度场测量

发布时间：2018-04-16 07:32

本文选题：光场相机 + 光场重聚焦　；参考：《东南大学学报(自然科学版)》2017年05期

【摘要】：为了实现瞬态火焰的三维温度场的测量,提出了一种基于光场分层成像技术的火焰温度场测量方法.利用光场相机通过一次曝光,将各个聚焦平面的信息储存在一张原始光场图像上,通过光场重聚焦技术获得了不同聚焦面的火焰图像序列,结合图像反演算法得到了高精度、实时性的火焰各断层图像,进而实现三维温度场分布的重建.建立了基于光场分层成像技术的火焰温度测量系统,实现对火焰三维空间上4个断层面的温度场重建.结果表明,重建的第1,4层的火焰面积较小,低温区域位置较低,第2,3层的火焰面积较大,低温区域位置较高;每层的火焰分布都是中部边缘处温度最高,且各层的火焰分布之间有明显差别.火焰重建实验结果符合燃烧火焰的外形结构和内部的温度分布结构,证明了此方法的可行性.
[Abstract]:In order to measure the three-dimensional temperature field of the transient flame, a method of measuring the temperature field of the flame based on the laminar imaging of the light field is proposed.The information of each focusing plane is stored on an original light field image by using a single exposure of the light field camera. The flame image sequences with different focusing surfaces are obtained by the light field refocusing technique, and the high accuracy is obtained by combining the image inversion algorithm.The real-time images of each fault of flame are used to reconstruct the three-dimensional temperature field distribution.A flame temperature measurement system based on light field stratification imaging technology is established to reconstruct the temperature field of four broken layers in the three dimensional space of flame.The results show that the flame area of the first layer is small, the low temperature area is lower, the flame area of the second layer is larger and the low temperature zone is higher, and the flame distribution of each layer is the highest at the middle edge.The flame distribution of each layer is obviously different.The experimental results of flame reconstruction accord with the shape of the combustion flame and the internal temperature distribution structure, which proves the feasibility of this method.
【作者单位】：东南大学能源热转换及其过程测控教育部重点实验室;
【基金】：国家自然科学基金资助项目(51506030,51327803) 江苏省自然科学基金资助项目(BK20150622,BK20150023)
【分类号】：TP391.41

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