The present invention relates to a crane having a boom at which at least one load receiving means is arranged in a raisable and lowerable manner, wherein an overload protection device has detection means for detecting the outreach and the load on the at least one load receiving means, and wherein a monitoring device for monitoring the overload protection device is provided and has determination means for determining a tensioning force holding the boom and/or induced in a guy cable. The invention furthermore also relates to a method for monitoring the overload protection device of such a crane. Provision is made in accordance with the invention that the monitoring device determines online in crane operation a tensioning torque from the continuously determined tensioning force, determines a lifting torque from the continuously detected outreach and the continuously detected load, determines a dead torque while making use of stored crane data, compares the sum of the named lifting torque and the named dead torque with the named tensioning torque and then, if a difference found in the comparison exceeds a tolerance threshold, emits an error signal and/or shutdown signal.

A low-power wire rope safety diagnosis method and a system thereof are provided. Since a sensor should be continuously turned on to allow a plurality of sensor nodes to diagnose safety of a wire rope in real time and it consumes much power, there is provided a method and system which can perform the safety diagnosis only when a movement is detected while being in a standby mode to reduce the power consumption, and determine a defect more correctly and consistently by utilizing deep learning when defects are determined through a wire rope safety diagnosis.

A system includes a hoist drive mechanism that elevates and lowers a load hook from a boom and a detector that provides obstacle location and identification information. A processor receives the obstacle location and identification information from the detector and provides obstacle avoidance data in response thereto.

A work state monitoring device for a work vehicle is provided, such that an operator can perform the work without receiving a warning. The work state monitoring device acquires a current work state of a crane using work posture detectors. A calculator calculates at least a predetermined work state corresponding to a warning load factor based on the current work state acquired by the work posture detectors. A monitor informs an operator of the predetermined work state calculated by the calculator.

Embodiments of the disclosure include a reel hoist interlock system for an overhead crane having one or more sensors disposed on a hook of the overhead crane. The sensors provide a signal indicative of whether the hook is secured to an object to be lifted by the overhead crane. The reel hoist interlock system also includes transmitters in communication with the sensors. The transmitters receive and transmit the signal provided by the sensors. The reel hoist interlock system further includes a controller configured to operate the overhead crane based on an input signal received from a remote and based on the signals received from the transmitters and indicators operated by the controller based on the signals received from at least one of the transmitters and the remote.

Embodiments of the disclosure include a reel hoist interlock system for an overhead crane having one or more sensors disposed on a hook of the overhead crane. The sensors provide a signal indicative of whether the hook is secured to an object to be lifted by the overhead crane. The reel hoist interlock system also includes transmitters in communication with the sensors. The transmitters receive and transmit the signal provided by the sensors. The reel hoist interlock system further includes a controller configured to operate the overhead crane based on an input signal received from a remote and based on the signals received from the transmitters and indicators operated by the controller based on the signals received from at least one of the transmitters and the remote.

A grappler overload protection system uses a load-measuring device to provide a first load indication for preventing the grappler from bearing an unsafe load when the first load indication exceeds a first limit. A grappler overload protection method determines a spread of grappler arms based on information from a first sensor, determines an expected weight of the load based on the spread of the grappler arms, and compares the expected weight to a first limit for preventing the grappler from bearing an unsafe load. The method may optionally determine an angle of a boom supporting the grappler for determining an expected torque on the boom based on the boom angle and the expected weight of the load. The method may take preventative measures to prevent the grappler from bearing the load when the expected weight exceeds the first limit or when the expected torque exceeds a second limit.

Systems and methods for preventing improper lifting of tubular members are described, in which sensing devices are used to detect when a tubular reaches a selected position within a lifting device suitable for engagement, and/or to detect when a lifting operation is initiated that would exceed the capacity of a lifting device. Operators are engaged with the tubular member and provided with a preselected force corresponding to the weight of one or more tubular members, such that when the weight of a lifting operation exceeds the preselected force, an audible device may be actuated responsive to sensor output, to immediately alert individuals, such that the improper lifting operation may be halted. Similarly, an audible device may be actuated responsive to sensor output when a tubular member reaches a selected position within the lifting device, such that additional movement may be ceased.

Provided is a safety lighting system for an overhead crane comprising a laser generator capable of generating a laser signal; and a crane control system having a programmable logic circuit; wherein the laser generator is integrated with the crane control system; and wherein the laser generator is operable to project a laser signal onto a surface corresponding to the position of the crane or crane components and a method of using the safety lighting system to determine when an object has crossed into a designated safety zone.

Provided is a safety lighting system for an overhead crane comprising a laser generator capable of generating a laser signal; and a crane control system having a programmable logic circuit; wherein the laser generator is integrated with the crane control system; and wherein the laser generator is operable to project a laser signal onto a surface corresponding to the position of the crane or crane components and a method of using the safety lighting system to determine when an object has crossed into a designated safety zone.