中文摘要：

针对连铸坯表面测温现状和存在的问题，建立了双色法（R、G）与单色法（B）相结合的实时测温模型。采用可见光面阵CCD图像传感器进行铸坯表面图像采集，实验研究了不同光圈（F）与积分时间下的R（红）、G（绿）、B（蓝）三基色值随温度的变化规律和动态响应区间。利用计算机图像处理技术建立了连铸热坯表面二维温度场与RGB的关联关系，实现了连铸热坯表面温度场的在线测量。通过控制CCD传感器光积分时间以提高CCD传感器的动态响应范围，为实现连铸坯表面温度场在线测量提供了理论基础和技术支撑。

英文摘要：

According to the present research status and existing problems of hot continuous billet surface temperature non contact measurement technology, a real time temperature measurement model, which combines two color（R,G） and monochrome （B） of surface radiation image, is established. The surface image is collected through tricolor charge coupled device （CCD） sensor, at the same time, the temperature dynamic response range of CCD can be improved by controlling integrated time and setting different apertures. Through computer image process technology, multi-point temperature can be measured simultaneously, and 2-D temperature field distribution on continuous casting billet surface can be realized. It is be proved by theory and application that the model and method can provide a theory and technology support for realizing surface temperature field on-line measurement for continuous casting billet.