Patent ID: 8949058
Filing Date: 2015-02-03
Classification: B66C

Abstract:
1. A crane control system for indirectly determining a load mass of a load carried by a hoist cable of a crane, comprising: a measurement arrangement for measuring a cable force in the hoist cable to produce a signal indicating the cable force; and a calculation unit including non-transitory code stored in a non-transitory computer-readable storage medium for receiving the signal indicating the cable force and indirectly determining the load mass based on the indicated cable force, wherein the calculation unit has a compensation unit, which calculates an influence of the indirect determination of the load mass via the cable force in a physical model in the calculation unit and at least partly compensates this influence in calculating the load mass, wherein the compensation unit includes a cable mass compensation which compensates for a weight of the hoist cable during the calculation of the load mass and which compensates for a change of cable length when the load is raised and/or lowered, wherein the hoisting gear includes a winch and a winch signal indicating an angle of rotation and/or a speed of rotation of the winch is received by the compensation unit and is an input parameter in the cable mass compensation.