Blast furnace material level height detection device

The utility model relates to a blast furnace burden height detecting device applied to a blast furnace system. The utility model is mainly and technically characterized in that a driven speed reducer is connected with the driven shaft end of a drum rope pulley, and the output shaft of the driven speed reducer is connected with an absolute value encoder and used for driving the absolute value encoder. The utility model relates to an all digital signal detection system, thereby ensuring that a trial rod hoisting system can not occur the phenomena of temperature drift and vibration accumulation drift, and eliminating the problem that the system loses the current burden height when power is energized newly after power failure, the zero position of remote calibration and the deepest burden level of the system are both convenient, the detection precision is very precise, and the structure is very simple.