Testing System Of Furnace Temperature Field In Circulating Fluid Bed Boiler

This paper mainly focuses on detecting he temperature of combustion flame in CFB. In this system, high temperature TVs are used to collect images, digital image processing technology is applied to process images, thermal radiation theory and plane surface array CCD' s chrome theory are introduced and the three ?color method is discussed to detect the temperature. The main job introduce the following aspects:1.According to the request of large area flame detection In modern CFB an idea named "Temperature Detection System Based on CCD and Digital Image Processing Technology" is decided. Basing on the mature and cheap high temperature in boiler is setup. The experimental data are obtained from above and these data are used to modeling.2.The physical process of boiler flame combustion and radiation and the three梒olor method using color CCD theory are studied. Mathematical model is constructed in order to explain the physical mechanism of flame temperature detection in boiler using CCD camera directly.3.A new temperature segmentation linear fitting method solves the problem caused by the nonlinear mapping between the temperature data and the chroma. That is dividing the temperature into some sections from high to low. Thus, the detection precision is improved. The error which is caused by figuring out the distribution of the whole temperature field by only one formula is estimated.4.It includes the following aspects:adopting the Partial Differential Equation and Neighborhood Average smoothing methods to reduce image noises. Mapping the RGB three 梒olor and gray scale histogram to study the relationship of flame features and temperature field distribution.5.Use Visual C++6.0 as a tool to program an applied software?"BoilerFlame Temperature Analysis System" . We also designed a CCD controllingpart. Using this we can easily make the CCD work under dissaturationand keep the measure precision.This paper is come from the practical problem. Physical mechanism of the problem itself is deeply studied. The corresponding mathematic model is constructed. The advanced and proper processing method is adopted, and finally an experimental system is designed.