基于相机响应函数和双色测温的火焰温度场重建方法  

Reconstruction method of flame temperature field based on camera response function and two-color pyrometry

作　　者：张英[1] 申雪皎 余飞扬 江勇[1] 唐凯旋 陈兵[2] 牛奕[1] ZHANG Ying;SHEN Xuejiao;YU Feiyang;JIANG Yong;TANG Kaixuan;CHEN Bing;NIU Yi(School of Safety Science and Emergency Management,Wuhan University of Technology,Wuhan Hubei 430070,China;China Academy of Safety Science and Technology,Beijing 100012,China)

机构地区：[1]武汉理工大学安全科学与应急管理学院,湖北武汉430070 [2]中国安全生产科学研究院,北京100012

出　　处：《中国安全生产科学技术》2023年第7期17-23,共7页Journal of Safety Science and Technology

基　　金：国家自然科学基金项目(52074202);湖北省重点研发计划项目(2021BCA151)。

摘　　要：为简单高效非侵入式测量火焰温度,基于相机响应函数和双色测温法,提出1种非侵入式火焰温度场重建技术。利用传感器成像原理,重新推导双色测温公式,内置色彩滤波器阵列的CMOS相机经过辐射自校准后,得到相机响应函数,进而揭示数字像素强度与辐照度之间关系;基于辐照度比值并通过彩色图像红绿通道,重建火焰二维温度场,将重建的温度值与热电偶测量值进行比较。研究结果表明:火焰温度场分布存在明显的高温锋面和轴向双峰特点,重建温度与测量值最大相对误差约为6.34%,吻合良好。该方法可以准确反映温度场分布特征和结果,基本实现非侵入式温度场有效重建。For the simple and efficient non-invasive measurement of flame temperature,a reconstruction technology of non-invasive flame temperature field was proposed based on the camera response function and two-color pyrometry method.Based on the principle of sensor imaging,the two-color pyrometry formula was deduced again.After the CMOS camera with built-in color filter array was self-calibrated by radiation,the camera response function was obtained,and then the relationship between digital pixel intensity and irradiance was revealed.Based on the irradiance ratio and through the red-green channel of color image,the two-dimensional temperature field of flame was reconstructed,and the reconstructed temperature values were compared with the thermocouple measurement values.The results showed that the flame temperature field distribution has obvious high-temperature front and axial bimodal characteristics.The maximum relative error between the reconstructed temperature and the measured value is about 6.34%,which indicates the good agreement.This method can accurately reflect the distribution characteristics and results of temperature field,and realize the effective reconstruction of non-invasive temperature field.

关 键 词：相机响应函数 辐射自校准 双色法 火焰温度场 

分 类 号：X932[环境科学与工程—安全科学]