通过对现有转炉下渣检测系统的分析,提出了一种基于红外热成像原理的嵌入式下渣检测方法,介绍了红外热成像技术原理,阐述了系统嵌入式架构及具体实现方法.该方法通过红外热像仪采集连续钢流图像,结合嵌入式系统技术,利用数字信号处理器(DSP)对采集到的钢流图像数据根据钢水与钢渣在远红外区的热辐射率不同进行特征信号提取与处理,再经DSP的主机并行接口(HPI)将处理后的图像数据发送给ARM处理器.最后采用图形用户接口MiniGUI设计了嵌入式环境下的图形用户界面,实现对转炉出钢过程中钢流状态的实时监控.现场试验表明:该方法成本低,对现有设备改造小,提高了挡渣效果,较好满足了钢水炉外精炼的要求.
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