A boom extension monitoring system is provided that uses a combination of sensors to determine an absolute location and a relative location of the boom. As the boom extends or retracts, the monitoring system can determine the absolute location of the boom as the sum of the absolute at relative distances. These distances can be obtained through a combination of a grid, low-resolution sensors, high-resolution sensors, counters, processors, and other components according to various embodiments described herein. A process to obtain the total boom extension of multiple telescoping beams by monitoring the extension of a single beam element is also described.

Provided are a server for maintenance, a remote monitoring system, and a remote monitoring method. The server is connected, via a network, to a plurality of working machines each including a working machine display device that displays machine state information and a working machine operating device to be used for predetermined operation, and to a monitoring terminal that includes a display part and remotely monitors information on the working machines. Communication between each of the plurality of working machines and the server is one-way communication from the working machines to the server. The server includes a first storage part, a second storage part, and a display processing part. The display processing part generates a display part simulated image, and causes the display part of the monitoring terminal to display a maintenance screen including the display part simulated image.

Provided are a server for maintenance, a remote monitoring system, and a remote monitoring method. The server is connected, via a network, to a plurality of working machines each including a working machine display device that displays machine state information and a working machine operating device to be used for predetermined operation, and to a monitoring terminal that includes a display part and remotely monitors information on the working machines. Communication between each of the plurality of working machines and the server is one-way communication from the working machines to the server. The server includes a first storage part, a second storage part, and a display processing part. The display processing part generates a display part simulated image, and causes the display part of the monitoring terminal to display a maintenance screen including the display part simulated image.

An operating device includes a crane controller for controlling actuators of the loading crane and for generating sensor data based on the sensor signals, and an input device spatially separated from the crane controller for inputting control commands for the crane controller. The crane controller has a first telecommunications device for exchanging data signals with the input device, and the data signals output by the crane controller include sensor data. The input device has a second telecommunications device for exchanging data signals including control commands with the first telecommunications device. The input device has a transmitter device for outputting data signals. A signaling device is spatially separated from the input device, and has a receiver device for receiving data signals output by the transmitter device and a display device for displaying audio data and/or image data. The signaling device signals the audio data and/or image data to a user.

A cargo crane including an arm turning mechanism that turns a crane arm; an arm luffing mechanism that adjusts the luffing angle; an arm extension and contraction mechanism that adjusts the arm length; and a control device that calculates a trajectory in which a suspended cargo is conveyed, and that controls the mechanisms. The control device calculates the trajectory so as to be a straight line trajectory as viewed from at least the vertical direction; calculates a turning angle θ, a luffing angle φ, and an arm length L so as to cause the trajectory to be the straight line trajectory by using the cargo start position, the cargo target position, a maximum speed v.sub.max, a suspended cargo swing cycle T, and a start-up time T.sub.1; and controls the mechanisms so as to achieve the calculated turning angle θ, luffing angle φ, and arm length L.

When performing the conveyance from an arbitrary cargo start position to an arbitrary cargo target position, it is possible to control swing prevention without constraint condition and with a simple control system. There is provided a cargo crane including an arm turning mechanism (4) that turns a crane arm (2); an arm luffing mechanism (3) that adjusts the luffing angle; an arm extension and contraction mechanism (5) that adjusts the arm length; and a control device that calculates a trajectory in which a suspended cargo (7) is conveyed, and that controls the arm turning mechanism (4), the arm luffing mechanism (3), and the arm extension and contraction mechanism (5). The control device calculates the trajectory so as to be a straight line trajectory as viewed from at least the vertical direction, according to the cargo start position and the cargo target position; calculates a turning angle θ, a luffing angle φ, and an arm length L so as to cause the trajectory to be the straight line trajectory by using the cargo start position, the cargo target position, a maximum speed v.sub.max, a suspended cargo swing cycle T, and a start-up time T.sub.1; and controls the arm turning mechanism (4), the arm luffing mechanism (3), and the arm extension and contraction mechanism (5) so as to achieve the calculated turning angle θ, luffing angle φ, and arm length L.

An overhead bridge crane detection system comprising a lidar sensor in communication with a controller, wherein the lidar sensor and the controller are located in a housing and the housing has a means for removable attachment to an overhead bridge crane or to maintenance equipment.

A dynamic lift-off control device that is mounted on a crane including a boom and a winch for winding a wire rope and that controls dynamic lift-off of a suspended load, wherein: the dynamic lift-off control device comprises a load detection unit that detects a load acting on the boom, and a control unit that controls a winding action of the winch and a hoisting action of the boom; and the control unit controls the hoisting of the boom by using a control signal, which is generated on the basis of the change over time in the value detected by the load detection unit and to which a filter for attenuating a frequency component in a prescribed range, to suppress swaying of the suspended load is applied.

A dynamic lift-off control device that is mounted on a crane including a boom and a winch for winding a wire rope and that controls dynamic lift-off of a suspended load, wherein: the dynamic lift-off control device comprises a load detection unit that detects a load acting on the boom, and a control unit that controls a winding action of the winch and a hoisting action of the boom; and the control unit controls the hoisting of the boom by using a control signal, which is generated on the basis of the change over time in the value detected by the load detection unit and to which a filter for attenuating a frequency component in a prescribed range, to suppress swaying of the suspended load is applied.

To estimate the top surface of a measurement target on the basis of a data point group that corresponds to the top surface of a measurement target and is obtained using a laser scanner. This top surface estimation method for hoisting loads and by acquiring, using the laser scanner, data point groups in a hoisting load region which includes a hoisting load and an object from above the hoisting load and the object, dividing the hoisting load region into layers which constitute a plurality of groups which have a prescribed thickness in the vertical direction, and allocating the acquired data point groups to the plurality of layer groups, and estimating the top surfaces of the hoisting load and the object in each layer group on the basis of the data point groups allocated to the plurality of layer groups.

To estimate the top surface of a measurement target on the basis of a data point group that corresponds to the top surface of a measurement target and is obtained using a laser scanner. This top surface estimation method for hoisting loads and by acquiring, using the laser scanner, data point groups in a hoisting load region which includes a hoisting load and an object from above the hoisting load and the object, dividing the hoisting load region into layers which constitute a plurality of groups which have a prescribed thickness in the vertical direction, and allocating the acquired data point groups to the plurality of layer groups, and estimating the top surfaces of the hoisting load and the object in each layer group on the basis of the data point groups allocated to the plurality of layer groups.