Abstract: A work vehicle includes: an operation tool that is operated by an operator; and a controller that determines a target flow rate for hydraulic oil fed to a hydraulic device on a basis of the amount of operation of the operation tool. The controller calculates a bleed-off target flow rate on a basis of the flow rate of hydraulic oil fed from a hydraulic oil pump and the target flow rate for hydraulic oil fed to the hydraulic device, calculates a bleed-off throttle differential pressure on a basis of a pressure of hydraulic oil fed from the hydraulic oil pump and a pressure of hydraulic oil in a hydraulic oil tank, calculates a bleed-off target opening area on a basis of the bleed-off target flow rate and the bleed-off throttle differential pressure, and controls a hydraulic oil control valve such that the bleed-off target opening area is achieved.

Abstract: A work vehicle includes: an operation tool that is operated by an operator; and a controller that determines a target flow rate for hydraulic oil fed to a hydraulic device on a basis of the amount of operation of the operation tool. The controller calculates a bleed-off target flow rate on a basis of the flow rate of hydraulic oil fed from a hydraulic oil pump and the target flow rate for hydraulic oil fed to the hydraulic device, calculates a bleed-off throttle differential pressure on a basis of a pressure of hydraulic oil fed from the hydraulic oil pump and a pressure of hydraulic oil in a hydraulic oil tank, calculates a bleed-off target opening area on a basis of the bleed-off target flow rate and the bleed-off throttle differential pressure, and controls a hydraulic oil control valve such that the bleed-off target opening area is achieved.

Abstract: A slewing apparatus includes a control section that performs at least a slewing angular velocity pattern determination process. In the slewing angular velocity pattern determination process, the slewing angular velocity pattern is determined such that in a first interval and a second interval of a control time T that is shorter than a cycle determined by a pendulum length of a suspended load that is in a pendulum motion, a difference between a maximum angular velocity and a minimum angular velocity increases as the control time T decreases.

Abstract: A slewing apparatus includes a control section that performs at least a slewing angular velocity pattern determination process. In the slewing angular velocity pattern determination process, the slewing angular velocity pattern is determined such that in a first interval and a second interval of a control time T that is shorter than a cycle determined by a pendulum length of a suspended load that is in a pendulum motion, a difference between a maximum angular velocity and a minimum angular velocity increases as the control time T decreases.

Abstract: There is provided a monitoring camera (32) at a tip of a boom, a monitor (70) configured to display a captured image of a hook suspended from the tip of the boom, an attitude angle calculation device (68) configured to calculate, based on hook image position information on a screen displayed on the monitor (70) and hook position information in a real space, an attitude angle of the camera, and the attitude angle calculation device (68) includes a hook position calculation unit (63) configured to calculate a hook position on the screen actually displayed on the monitor (70), a shift amount calculation unit (64) configured to calculate the distance between the hook position calculated by the hook position calculation unit (63) and a reference hook position of the hook on the screen displayed on the monitor (70) when it is assumed that the camera faces directly downward, and a camera inclination angle calculation unit (65) configured to calculate an inclination angle of the monitoring camera (32) based on the di

Abstract: Provided is a work plan verification device capable of improving work efficiency of movement work of a suspension load. The work plan verification device determines whether an operator indicates a movement position of the suspension load on an image (A) displayed on a monitor (30). When a determination is made that the movement position is indicated, a mark is displayed on the movement position (B). Subsequently, a determination is made that the suspension load is suspended on a boom. When the determination is made that the suspension load is suspended, a load factor (C1) which is moving determination information allowing an operator to determine whether the suspension load can be moved to the movement position (B) is calculated, and the calculated load factor is displayed on the image (A).

Abstract: There is provided a monitoring camera (32) at a tip of a boom, a monitor (70) configured to display a captured image of a hook suspended from the tip of the boom, an attitude angle calculation device (68) configured to calculate, based on hook image position information on a screen displayed on the monitor (70) and hook position information in a real space, an attitude angle of the camera, and the attitude angle calculation device (68) includes a hook position calculation unit (63) configured to calculate a hook position on the screen actually displayed on the monitor (70), a shift amount calculation unit (64) configured to calculate the distance between the hook position calculated by the hook position calculation unit (63) and a reference hook position of the hook on the screen displayed on the monitor (70) when it is assumed that the camera faces directly downward, and a camera inclination angle calculation unit (65) configured to calculate an inclination angle of the monitoring camera (32) based on the di

Abstract: At an end portion of a telescopic boom of a crane, a stereo camera which measures a distance from the end portion to an object is provided, and an image-processing controller which obtains three-dimensional position information of the object based on the crane as reference from measurement data to the object by the stereo camera is provided, and three-dimensional position information of an object in a surrounding area centering on the crane by the moving the telescopic boom is obtained.

Abstract: A performance line display unit includes an imaging device which is attached near a leading end of an extensible boom provided on a rotation platform rotatably placed on a vehicle of a crane, a display configured to display an image imaged by the imaging device, and a performance line arithmetic part configured to obtain a performance line regarding a suspended load maximum performance of a crane, wherein the performance line arithmetic part is configured to overlap the performance line with a position of the image corresponding to the obtained performance line to be displayed on the display.

Abstract: At an end portion of a telescopic boom of a crane, a stereo camera which measures a distance from the end portion to an object is provided, and an image-processing controller which obtains three-dimensional position information of the object based on the crane as reference from measurement data to the object by the stereo camera is provided, and three-dimensional positon information of an object in a surrounding area centering on the crane by the moving the telescopic boom is obtained.

Abstract: Provided is a work plan verification device capable of improving work efficiency of movement work of a suspension load. The work plan verification device determines whether an operator indicates a movement position of the suspension load on an image (A) displayed on a monitor (30). When a determination is made that the movement position is indicated, a mark is displayed on the movement position (B). Subsequently, a determination is made that the suspension load is suspended on a boom. When the determination is made that the suspension load is suspended, a load factor (C1) which is moving determination information allowing an operator to determine whether the suspension load can be moved to the movement position (B) is calculated, and the calculated load factor is displayed on the image (A).

Abstract: A performance line display unit includes an imaging device which is attached near a leading end of an extensible boom provided on a rotation platform rotatably placed on a vehicle of a crane, a display configured to display an image imaged by the imaging device, and a performance line arithmetic part configured to obtain a performance line regarding a suspended load maximum performance of a crane, wherein the performance line arithmetic part is configured to overlap the performance line with a position of the image corresponding to the obtained performance line to be displayed on the display.