基于光场测温的采样特性优化研究  

Optimization of sampling characteristics based on light field temperature measurement

作　　者：杨力 牛志田 高包海 任亚涛[1,2] 齐宏 Yang Li;Niu Zhitian;Gao Baohai;Ren Yatao;Qi Hong(School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Key Laboratory of Aerospace Thermal Physics,Ministry of Industry and Information Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学能源科学与工程学院,哈尔滨150001 [2]工业和信息化部航空航天热物理重点实验室,哈尔滨150001

出　　处：《空天技术》2023年第1期132-139,158,共9页Aerospace Technology

摘　　要：高温燃烧现象在航空航天和工业生产中广泛存在,发展精确高效的燃烧温度测量技术对于监测设备运行状态具有重要意义。光场层析成像是一种非接触式光学燃烧诊断技术,利用光场相机对火焰自身出射辐射场进行探测,在火焰三维参数场重建方面具有广阔的应用前景。针对光场相机信息获取过程中的密集采样和信息冗余所导致的成像效率慢问题,基于光场层析成像和视在光线法建立的正问题模型和Landweber算法建立的反问题模型,利用遗传算法优化光场采样特性并分析了噪声对于温度场重建结果的影响。结果表明,优化的特征采样点可获得精度高和抗噪性强的三维温度成像,满足火焰测温成像精度要求。High temperature combustion phenomenon is widespread in aerospace and industrial production. The development of accurate and efficient combustion temperature measurement technology is of great significance for monitoring the operation status of equipment. Tomography is a non-contact optical combustion diagnostic technique that uses an optical field camera to detect the flame’s own outgoing radiation field. It has promising applications in three-dimensional parametric field reconstruction of flames. Aiming at the problems of slow imaging efficiency caused by dense sampling and information redundancy in the process of light field camera information acquisition, based on the forward problem model established by light field tomography and apparent light method and the inverse problem model established by Landweber algorithm, the genetic algorithm is used to optimize the light field sampling characteristics and analyze the influence of noise on the temperature field reconstruction results. The results show that the optimized feature sampling points can obtain three-dimensional temperature imaging results with high accuracy and strong noise immunity, which meets the accuracy requirements of flame temperature measurement and imaging.

关 键 词：热辐射传输 温度场重建 层析成像 采样优化 遗传算法 

分 类 号：O551.2[理学—热学与物质分子运动论]