According to embodiments, a method for operating a lifting device monitoring with a control unit, monitoring current supplied to the lift actuator when the lift actuator is actuated; discontinuing the current supplied to the lift actuator when the current exceeds a current threshold value; determining an accumulated number of overload stops based on the current supplied to the lift actuator; determining at least one operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determining an accumulated load-time parameter for the lifting device based on the at least one operating characteristic and the operating time; and uploading, with a transceiver, at least one of the accumulated number of overload stops and the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.

According to embodiments, a method for operating a lifting device monitoring with a control unit, monitoring current supplied to the lift actuator when the lift actuator is actuated; discontinuing the current supplied to the lift actuator when the current exceeds a current threshold value; determining an accumulated number of overload stops based on the current supplied to the lift actuator; determining at least one operating characteristic of the lifting device and an operating time of the lifting device as the lifting device is actuated; determining an accumulated load-time parameter for the lifting device based on the at least one operating characteristic and the operating time; and uploading, with a transceiver, at least one of the accumulated number of overload stops and the accumulated load-time parameter to at least one of the computer, the network, and the data storage device.

A load-leveling hanging apparatus and a system for suspended lifting of objects are disclosed. The load-leveling hanging apparatus includes a carriage suspended from a line; a hanging beam adapted for attachment of multiple objects at points along the beam; a mechanism for moving the hanging beam relative to the carriage to thereby achieve a level condition; and a level indicator. The mechanism is a rotatable screw. The system includes the load-leveling hanging apparatus and a lifting device. The lifting device includes a drum for winding and unwinding a line; a motor coupled to the drum to apply a torque thereto; a guide to direct the line onto the drum; and a controller. The lifting device raises and lowers the suspended hanging apparatus.

A boom working device has a boom, mounted on and extending from a boom support, on which an end effector mounting interface is formed. The boom is equipped with two linear output structures, each in engagement with one of two drive wheels of the boom support. With respect to the boom support, the boom is both pivotable around a main axis and also capable of linear movement at right-angles to the main axis. Through harmonised rotary actuation of the drive wheels an operating movement of the boom may be generated, consisting either of a pivoting movement alone or of a linear movement alone or of the pivoting movement with simultaneously superimposed linear movement.

A boom working device has a boom, mounted on and extending from a boom support, on which an end effector mounting interface is formed. The boom is equipped with two linear output structures, each in engagement with one of two drive wheels of the boom support. With respect to the boom support, the boom is both pivotable around a main axis and also capable of linear movement at right-angles to the main axis. Through harmonised rotary actuation of the drive wheels an operating movement of the boom may be generated, consisting either of a pivoting movement alone or of a linear movement alone or of the pivoting movement with simultaneously superimposed linear movement.

A plate assembly for mounting an electrical enclosure in a position vertically aligned atop an overhead rail used to support a traveling hoist which traverses back and forth along the rails on a trolley. The plate assembly includes a plate which is shaped like an inverted U by a central opening extending up from the bottom with mounting portions projecting normal to the plate which are configured to be attached to the enclosure when installed in the opening at the top and to respective rail pieces clamped against respective sides of the opening.

A plate assembly for mounting an electrical enclosure in a position vertically aligned atop an overhead rail used to support a traveling hoist which traverses back and forth along the rails on a trolley. The plate assembly includes a plate which is shaped like an inverted U by a central opening extending up from the bottom with mounting portions projecting normal to the plate which are configured to be attached to the enclosure when installed in the opening at the top and to respective rail pieces clamped against respective sides of the opening.

A tower crane includes a tower on which a rotating portion is pivotally mounted and configurable between a service configuration in which the rotating portion can be rotatably driven by a motorized orientation system, and an out of service configuration in which the rotating portion is rotatably released to be able to be oriented in the direction of the wind. A control/command unit activates a monitoring mode in the out of service configuration to detect, depending on variations in the angle of orientation or the angular speed of the rotating portion, if the rotating portion is in one of the following movement states: an autorotation state corresponding to a rotary movement of the rotating portion in a given direction over at least one complete turn; or an oscillation state corresponding to a back and forth movement of the rotating portion about the orientation axis.

A tower crane includes a tower on which a rotating portion is pivotally mounted and configurable between a service configuration in which the rotating portion can be rotatably driven by a motorized orientation system, and an out of service configuration in which the rotating portion is rotatably released to be able to be oriented in the direction of the wind. A control/command unit activates a monitoring mode in the out of service configuration to detect, depending on variations in the angle of orientation or the angular speed of the rotating portion, if the rotating portion is in one of the following movement states: an autorotation state corresponding to a rotary movement of the rotating portion in a given direction over at least one complete turn; or an oscillation state corresponding to a back and forth movement of the rotating portion about the orientation axis.

A nonlinear resonance model-based active filtering crane steel rope resonance elimination control method, including: constructing a two-dimensional dynamic model of a bridge crane according to a Lagrange's equation; constructing a steel wire rope-motor nonlinear resonance model to detect a harmonic; and eliminating the harmonic by means of active filtering. The present disclosure makes in-depth study on positioning of a crane and intelligent control of an anti-swing and resonance elimination control system and uses active filtering to eliminate resonance between a heavy object and the steel wire rope, thereby reducing a swinging angle and achieving the rapid resonance elimination and anti-swing effect. The active filtering technology can quickly and effectively detect a resonance current so as to effectively suppress resonance between the heavy object and the steel wire rope, and further helps a controller quickly and accurately position a trolley to further improve anti-swing performance.