The present invention relates to a method for weathervaning of a crane which has a boom which can rotate about a vertical axis, a slewing gear motor and a slewing gear service brake for securing the boom in a rotational position with a securing torque in the crane mode, wherein in the case of a crane which has been out-of-operation, the boom is braked against rotation with an out-of-operation mode braking torque which is less than said securing torque in the crane mode. In this respect, the invention also relates to such a crane itself, in particular in the form of a revolving tower crane. In accordance with the invention, the out-of-operation mode braking torque is kept at least approximately constant over the range of the speed of rotation and over the range of the angle of rotation of the boom.

The present invention relates to a method for weathervaning of a crane which has a boom which can rotate about a vertical axis, a slewing gear motor and a slewing gear service brake for securing the boom in a rotational position with a securing torque in the crane mode, wherein in the case of a crane which has been out-of-operation, the boom is braked against rotation with an out-of-operation mode braking torque which is less than said securing torque in the crane mode. In this respect, the invention also relates to such a crane itself, in particular in the form of a revolving tower crane. In accordance with the invention, the out-of-operation mode braking torque is kept at least approximately constant over the range of the speed of rotation and over the range of the angle of rotation of the boom.

The invention relates to a method for installing an anti-collision device of a crane which has a boom that can be rotated about an upright rotational axis of the crane. A crane position and an orientation of the crane, in particular of the boom, are determined, wherein the crane position is automatically determined by means of a satellite navigation module on the crane and is provided to the anti-collision device in the form of global coordinates, and the orientation of the crane is automatically determined by means of an orientation sensor system attached to the crane and is provided to the anti-collision device in the form of a direction in the global coordinate system.

The invention relates to a method for installing an anti-collision device of a crane which has a boom that can be rotated about an upright rotational axis of the crane. A crane position and an orientation of the crane, in particular of the boom, are determined, wherein the crane position is automatically determined by means of a satellite navigation module on the crane and is provided to the anti-collision device in the form of global coordinates, and the orientation of the crane is automatically determined by means of an orientation sensor system attached to the crane and is provided to the anti-collision device in the form of a direction in the global coordinate system.

The present disclosure relates to engineering machinery and a dynamic anti-collision method, device, and system for operation space thereof. The dynamic anti-collision method for operation space includes: receiving obstacle information of an obstacle around a boom of engineering machinery and boom motion information of the engineering machinery; determining obstacle coordinates according to the obstacle information and the boom motion information; deciding whether the obstacle coordinates are located in a predetermined early warning area or not; and indicating an execution device to send out collision warning information in case where the obstacle coordinates are located in the predetermined early warning area.

The present disclosure relates to engineering machinery and a dynamic anti-collision method, device, and system for operation space thereof. The dynamic anti-collision method for operation space includes: receiving obstacle information of an obstacle around a boom of engineering machinery and boom motion information of the engineering machinery; determining obstacle coordinates according to the obstacle information and the boom motion information; deciding whether the obstacle coordinates are located in a predetermined early warning area or not; and indicating an execution device to send out collision warning information in case where the obstacle coordinates are located in the predetermined early warning area.

A crawler crane includes: a seating switch that detects whether an operator is in a driver seat; a turn angle potentiometer that detects the turn position of a boom; and a controller. The controller is provided with a boom turn restriction control unit for performing a boom turn-restricting control whereby the boom is not allowed to turn within a predetermined angular range above the driver seat on the basis of the output from the turn angle potentiometer. The boom turn restriction control unit includes a restriction-canceling unit that cancels the boom turn-restricting control performed by a turn-restricting unit if a preset restriction-canceling condition is met. The boom turn restriction control unit cancels the boom turn-restricting control if the seating switch does not detect an operator. Ease of operation and work can thus be improved in a remote operation mode and the like.

A crawler crane includes: a seating switch that detects whether an operator is in a driver seat; a turn angle potentiometer that detects the turn position of a boom; and a controller. The controller is provided with a boom turn restriction control unit for performing a boom turn-restricting control whereby the boom is not allowed to turn within a predetermined angular range above the driver seat on the basis of the output from the turn angle potentiometer. The boom turn restriction control unit includes a restriction-canceling unit that cancels the boom turn-restricting control performed by a turn-restricting unit if a preset restriction-canceling condition is met. The boom turn restriction control unit cancels the boom turn-restricting control if the seating switch does not detect an operator. Ease of operation and work can thus be improved in a remote operation mode and the like.

A limited rotation slewing ring crane comprises: a pedestal, a column rotatively coupled, about a first rotation axis, to the pedestal by a slewing ring rotative coupling, and means for limiting the relative rotation of the column with respect to the pedestal. The crane further comprises a rotative sensor adapted to measure a rotation angle of the column with respect to the pedestal, wherein said rotation sensor comprises: a tubular body axially extending from the base of the column and rotatively integral with the same; a stationary body connected to the pedestal and a wheel, rotatable with respect to the stationary body about a second rotation axis, which is meshed by the tubular body, wherein the second rotation axis of the wheel with respect to the stationary body is offset with respect to the first rotation axis of the column with respect to the pedestal; means for sensing the angular position of the wheel with respect to the stationary body.

A limited rotation slewing ring crane comprises: a pedestal, a column rotatively coupled, about a first rotation axis, to the pedestal by a slewing ring rotative coupling, and means for limiting the relative rotation of the column with respect to the pedestal. The crane further comprises a rotative sensor adapted to measure a rotation angle of the column with respect to the pedestal, wherein said rotation sensor comprises: a tubular body axially extending from the base of the column and rotatively integral with the same; a stationary body connected to the pedestal and a wheel, rotatable with respect to the stationary body about a second rotation axis, which is meshed by the tubular body, wherein the second rotation axis of the wheel with respect to the stationary body is offset with respect to the first rotation axis of the column with respect to the pedestal; means for sensing the angular position of the wheel with respect to the stationary body.