Method for improving definition of furnace top imaging monitoring picture

The invention belongs to the technical field of steelmaking, and relates to a method for improving the definition of a furnace top imaging monitoring picture. The method comprises the following steps: processing a furnace top imaging purging system, and reducing an observation hole in front of a camera lens so as to enlarge the protection area in front of a camera; and changing original single-path nitrogen purging into double-path nitrogen purging so that nitrogen passes through a camera inner cylinder and a camera outer cylinder to purge the camera, thereby enhancing the capability of purging the camera lens. The method has the characteristics of clear and reliable imaging monitoring picture, guarantee of blast furnace operation, improvement of the control capability of a producer and the like. 本发明属于炼钢技术领域，涉及一种提高炉顶成像监控画面清晰度的方法，所述方法由以下步骤完成：对炉顶成像吹扫系统进行加工，将摄像机镜头前的观察孔变小，从而增大摄像头前面的保护面积，将原有的单路氮气吹扫改成双路，氮气通过摄像机内筒和摄像机外筒，对摄像机进行扫吹，加强对摄像机镜头的吹扫能力。本发明具有成像监控画面清晰可靠、保证高炉运行、提高生产方控制能力等特点。