| 摘要 |
PROBLEM TO BE SOLVED: To save space by making a horn length short even when millimeter waves are used, while using a horn antenna having a simple structure.SOLUTION: A surface detection device for blast furnace charging materials includes: a reflection plate disposed directly over an opening part provided in the vicinity of a furnace top of a blast furnace; an antenna oppositely disposed to a reflection surface of a reflection plate; and transmission/reception means for a detection wave connected to the antenna. The antenna is a horn antenna or the horn antenna with lens, and is fixed apart from the reflection plate with a prescribed distance. The reflection surface of the reflection plate is a concave surface curved to be a concave shape at a side opposite to the opening part of a plane or the horn antenna. The horn antenna and the reflection plate in which the reflection surface is the concave surface, the reflection plate in which the horn antenna with lens and the reflection surface are the plane, and the reflection plate in which the horn antenna with lens and the reflection surface are the plane or the reflection plate in which the horn antenna with lens and the reflection surface are the concave surface are combined, and the surface of the charging materials is scanned by the detection wave by varying a reflection angle by the reflection surface, thereby detecting the distance up to the surface of the charging materials and a profile of the surface. |
