连铸结晶器在线热像图绘制的方法

A method for plotting the on-line thermal map of a continuous casting mould

为实现结晶器过程可视化和辅助漏钢预报技术,提出一种等值线区域填充法快速高效绘制直观的结晶器在线热像图的方法.该方法通过离散数据网格化、等值线生成和等值多边形填充绘制云图.其中,等值线生成采用网格序列法和单元剖分法结合,避免了已往的等值线追踪和二义性问题,高效准确,实现简单.将该方法与扫描母元法相比,前者绘制云图速度快,保证了精度和质量,优于后者,且算法复杂度的分析也证明了前者时间效率较高.实际应用结果表明,该方法绘制的结晶器在线热像图能很好地反映正常和非正常情况下结晶器内部温度场的特征,可满足实际生产要求.

To realize the visualization of mould processes and to assist the breakout prediction technology, a contour region filling method was proposed to plot an intuitive on-line thermal map of a mould quickly and efficiently. This method uses discrete data gridding, contour line generating and contour polygon filling to plot the nephogram. A combination of the grid sequence method with the cell subdivision method is adopted for contour line generating, which is more efficient, accurate and simple because of avoiding the contour line tracking and ambiguity. The method was compared with the scan parent element method. The results indicate that the former can plot the nephogram rapidly, ensure its precision and quality, so is better than the latter. Algorithm complexity analysis also proves that the time efficiency of the former is higher. Practical application results show that the on-line thermal map based on the method can reflect the temperature field characteristics of the mould in normal and abnormal conditions well, and is satisfactory for the process of practical production.