摘要
本文提出了一种通过计算机视觉技术检测连铸中间包内钢水层液位高度的方法。从中间包内空气层中穿过保护渣层向钢水层中插入一个铝碳质的测量棒,通过安装于测量棒侧上方的摄像机采集测量棒图像,进而确定保护渣层的实时液位。待测量棒与周围介质达到热平衡后,升起测量棒,并通过摄像机采集测量棒外壁的温场分布,根据保护渣层和钢水层分界面处存在局部温度梯度峰值的特征识别分界面位置及保护渣层厚度,从而确定中间包内钢水层液位。同时,本文对于液位测量系统的构成以及降温、防尘等关键问题进行了研究。现场应用结果表明:本方法能够有效克服保护渣层影响,实现中间包内钢水层液位的可靠测量,测量偏差小于5mm。
A computer vision based on-line molten steel level measurement method is proposed for continuous casting tundish. An alumina carbon measuring bar is inserted into the molten steel layer from the air layer through the flux slag layer. By equipping a camera on the top corner of the measuring bar, the level of the flux slag layer is real-time positioned by pattern recognition. When reaching heat balance, the measuring bar is raised and the temperature distribution of the measuring bar is detected by the camera. After that, the interface between the molten steel layer and the flux slag layer, the thickness of the flux slag layer are both calculated by the local maximum temperature gradient, and then the molten steel level is measured. Meanwhile, the structure of the molten steel level measuring system and some key technologies such as heat protection and duct elimination are discussed too. Long time used in a steel plant, this method is proved to be authentic and applicable. It can overcome the influence of the flux slag and the measurement error is less than 5 mm.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2010年第1期143-148,共6页
Chinese Journal of Scientific Instrument
基金
国家高技术研究发展计划(863计划)项目(2007AA04Z194)资助
关键词
计算机视觉
保护渣层
钢水层
测量棒
液位测量
分界面定位
computer vision
flux slag layer
molten steel layer
measuring bar
level measurement
interface location
