摘要
提出一种基于多光谱辐射测温理论及光学层析技术的三维温度场重建方法。建立了基于参考温度的多光谱测温法数学模型 ,提出了一种基于模拟退火理论的变松弛因子的光学层析技术新算法 ,通过计算机数值模拟 ,详细考察了该算法对非对称温度场分布的重建效果并与传统的代数迭代重建算法及滤波反投影算法进行比较。计算结果表明 ,变弛豫因子重建算法重建精度最高。作为一个应用实例 。
A novel 3-D temperature field reconstruction method is proposed, which is based on multi-wavelength thermometry and optical computed tomography. A mathematical model of multi-wavelength thermometry is founded, and a novel optical computed tomography based on changeable relaxation parameter technique is proposed. Through computer simulation and comparison with algebraic reconstruction technique and filter back-projection algorithm, the reconstruction results of the new method are discussed in detail. The study shows that the new method always gives the best reconstruction results. As an example, temperature distribution of a profile of four peaks candle flame is reconstructed with multi-wavelength radiation computed tomography.
出处
《光学学报》
EI
CAS
CSCD
北大核心
2003年第9期1099-1104,共6页
Acta Optica Sinica
基金
中国航空科学基金 (0 0I5 6 0 0 0 4 )
江西省测控工程研究中心基金 (KG2 0 0 10 4 0 0 2 )资助课题
关键词
多光谱辐射层析
图像重建算法
数值模拟
火焰温度场
辐射测温
光学层析技术
变弛豫因子
信噪比
Computer simulation
Computerized tomography
Flame research
Heat radiation
Image reconstruction
Mathematical models
Signal to noise ratio
Simulated annealing
