基于辐射图象处理的炉膛燃烧三维温度分布检测原理及分析

采用数字化摄象装置从电站锅炉炉膛第三级燃烧空间摄取燃烧辐射圈象时，所得到的二维灰度分布图象实质上是燃烧介质的三维辐射能量通过光学成象的方式在图象传感器（如CCD靶面）二维平面上的某种累积效应，以此原理为基础，本文建立了二维辐射国象和三维辐射能量（温度）分布的数学关系式，并从比色测温法入手，从理论上解决了其中难度较大的从幅射能转换到图象灰度的定量关系问题，使得这种方法变得简单易行。最后对这种方法实施的可行性进行了分析，并讨论了改进测量精度的途径。这种方法容易推广到内燃机燃烧、航空发动机燃烧等场合的三维温度分布检测中。

Maasurement Method of Three-Dimensional Combustion Temperature Distribution in Utility Furnaces Based on Image Processing Radiative

When the combustion images in utility boilers are captured by some digital image processing systems the two-dimensional giay-scale distribution in the images is just a kind of integral effect of the three-dimensional radiative energy of the combusting mixture in furnaces on the image transducer (i. e.the target of Charge-Coupled Device) through optical image formation. Based on this fundamental,a mathematical equation between the two-dimensional gray-scale image and the three dimensional temperature distribution is set up,and with the aid of two-color pyrometer, the quantitative relationship between the radiative energy from the furnaces and the grey-scale of the images, which will be very difficult in general case,has been es tabilished, the feasibility of this method is discussed, and some consideration to improve this method is proposed. This method can be extended into the case of measurement of three-dimen sional combustion temperature distribution in nternal engine combustion, jet engine combustion,etc.