Patent ID: 9738493
Date: 2017-08-22
CPC Classifications: B66C

Claim:
1. A crane, in particular a tower slewing cranecomprising: a jib rotatable about an upright axis, at which jib a trolley is movably arranged, from which trolley a hoist rope connected to a load hook runs off, as well as a load hook position determining device for determining a load hook position, wherein the load hook position determining device comprises a camera arranged at the trolley and oriented downward towards the load hook in a predetermined viewing direction, an image data processing and evaluation system comprising a processor, an image evaluator carried out in the processor for determining an image position of the load hook in a camera image provided by the camera via at least one of pixel evaluation, contour evaluation, and color evaluation, and position determining means carried out in the processor for determining the load hook position based on the determined image position of the load hook in the camera image while taking into account a position of the trolley and providing a load hook position signal.