基于DSP的加热炉内钢坯表面温度检测及分析

Temperature measurement system of billet surface in furnace and analysis based on DSP

设计了一种加热炉内钢坯表面温度实时检测系统,以DSP为图像处理核心,采集加热炉内两幅临近中心波长的近红外辐射图像,用比色测温算法计算出钢坯表面温度。对比色测温原理、系统的硬件电路、软件流程和试验效果进行了分析。在H型钢加热炉的试验表明,系统能实时检测加热钢坯的表面温度,实时生成加热炉内温度场的伪彩图像并完成工况分析。钢坯表面温度检测的相对误差小于0.5%,满足加热炉温度控制工艺的要求。

A real-time detection system of billet surface temperature measurement in furnace was designed, employing DSP as the image processing center. Two near-infrared radiation images were collected in the furnace, and the billet surface temperature was calculated using the colorimetric thermometry algorithm. The principle of colorimetric thermometry, the system hardware, software and testing effect are analyzed. The testing in the H-beam furnace show that the system can check the whole surface temperature of billet real-time, display the temperature field using pseudo-color image, and analysis the operating conditions of furnace. The relative error of temperature detection accuracy is less than 0.5%, satisfying the demand of the furnace control system.