【摘要】 用红外测温对钢包内壁进行温度测量时,因难以确定钢包内壁发射率而产生误差。文中提出一种基于蒙特卡洛模型的钢包腔体有效发射率校正的钢包温度测量方法。建立钢包腔体蒙特卡洛有效发射率计算模型,分析确定钢包口挡板与钢包口距离、钢包内壁材料发射率对钢包腔体有效发射率的影响,通过发射率校正将钢包红外测温的亮度温度校正为真实温度。现场测量结果表明:测量温度场测量值与热电偶测温值对比验证最大(绝对)误差为4.7℃,最小误差为0.6℃,平均误差小于2.8℃,达到较高的测量精度,为基于温度信息的炼钢工艺控制提供重要参数信息。更多还原

【Abstract】 Uncertain emissivity of the ladle inner wall caused error to infrared temperature measurement for the temperature measurement.This article proposed a method for measuring ladle temperature based on Monte Carlo model for effective emissivity correction of ladle cavity.Monte Carlo effective emissivity calculation model of the ladle cavity was established, and influence of the ladle cavity effective emissivity was analyzed which was on the one hand caused by the distance between the ladle baffle and the ladle mouth, and on the other hand caused by the inner wall material emissivity.The brightness temperature was corrected to the true temperature through the effective emissivity calculation model.Measurement results in field shows that maximum(absolute) error between the method in this article and thermocouple measurement is 4.7 ℃,minimum error is 0.6 ℃,and average error is less than 2.8 ℃.It achieves high accuracy and provides important parameter information for metallurgical process control based on temperature information.更多还原