System for determining the load mass of a load suspended on a lifting rope of a crane

摘要

The system has a measurement arrangement for measuring a cable weight (22) in a hoist cable, and a calculation unit (26) for indirectly determining the exact load mass (24) based on the cable force. The calculation unit comprises a compensation unit describing influence of the indirect determination of the load mass via the cable force in a model and partly compensates the influence. The compensation unit works on the basis of data on a position and/or movement of a hoisting gear, boom and/or of a tower of the crane. An independent claim is also included for a method for determining a load mass of a load carried by a hoist cable.