ROTARY TOWER CRANE Russian patent published in 2017 - IPC B66C13/46 

FIELD: construction.

SUBSTANCE: weight-lifting crane with a pivoting jib whereon a hoist travelling trolley is installed. A hoist cable with a hoist cook hangs off the trolley. The crane is also equipped with a position indicating device for the hoist hook to sense the position of the hook. The position of the hoist hook can be determined visually by means of a camera mounted on the hoist trolley and observing from the hoist trolley in the set and therefore known direction of surveillance down to the hoist hook. The video data evaluation unit determines the position of the hoist hook in the camera image. The video data evaluation unit may comprise a determination means for the travel of the hoist cable extending down from the hoist trolley. The connection point of two converging at an acute angle lines or conical lines representing the travel of the hoist cable may be taken, at least approximately, as the position of the hoist hook.

EFFECT: expansion of the functionality of a tower crane.

16 cl, 5 dwg