Mobile crane
AssigneeLiebherr-Werk Ehingen GmbH
InventorErwin Morath
Life of this patent
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Abstract
The present application relates to a mobile crane comprising a telescopic boom which has a hinged section and at least one telescopic section which can be telescoped out of it, or to a crawler-mounted crane. In accordance with one embodiment, as a position detection device, it has at least one transducer in the form of an inductively operating transponder, a receiver unit for the sensing of the position of the transducer, a control device for control in dependence on a signal of the receiver unit, as well as a signal transmission device in the form of a databus for the transmission of the signal data from the receiver unit to the control device.
Claims20
A mobile crane comprising:
- a lattice boom comprising a plurality of lattice elements;
- a detection device comprising a plurality of inductively operating transponders arranged at the lattice elements and a plurality of receiver units arranged at the lattice elements, each transponder of the plurality of inductively operating transponders configured to transmit information to a corresponding receiver unit of the plurality of receiver units, the corresponding receiver unit arranged at an adjacent lattice element and configured to sense the transponder;
- a control device configured to control the crane in dependence on signals of the plurality of receiver units;
- and
- a databus configured to transmit the information from the plurality of receiver units to the control device;
- wherein each transponder of the plurality of inductively operating transponders is an RFID transponder configured to transmit back the information stored thereon as a modulated RF signal, and wherein each receiver unit of the plurality of receiver units is an RFID reader comprising a digital electronic system that controls the RFID transponder to transmit back the information.
A mobile crane comprising:
- a lattice boom comprising a plurality of lattice elements;
- a detection device comprising a plurality of inductively operating transponders including a first inductively operating transponder arranged at a first lattice element and a plurality of receiver units including a first receiver unit arranged at a second lattice element, the first inductively operating transponder configured to transmit information to the first receiver unit, and the first receiver unit configured to sense the first inductively operating transponder;
- a control device configured to control the crane in dependence on signals of the receiver units;
- and
- a databus configured to transmit information from the receiver units to the control device;
- wherein each inductively operating transponder is an RFID transponder configured to transmit back the information stored thereon as a modulated RF signal, and wherein each receiver unit is an RFID reader comprising a digital electronic system that controls the RFID transponder to transmit back the information.
A method for a mobile crane, comprising:
- determining a setup condition of a derrick boom after an assembly of lattice elements of the derrick boom, the determination including reading out signals sent by RFID transponders arranged at the lattice elements to corresponding RFID readers, the RFID readers connected to a control computer of the crane via a databus;
- and
- determining a geometrical configuration of the crane based on the setup condition of the derrick boom.
Dependencies are inferred from the claim text.