Hitachi Construction Machinery Co., Ltd.

Yuho Saito

Shinya Imura

Hidekazu Moriki

Takaaki Chiba

Masamichi Ito

Shinjiro Yamamoto

Kouji Shiwaku

An overhead-view image of a work site is presented to an operator of a work machine even when the number of imaging devices at a construction site is lacking. The present disclosure provides an information presentation device for generating and outputting a terrain image relating to a construction site. The information presentation device includes a storage device that stores a program for performing a predetermined imaging process on the terrain image, and a processor for reading the program from the storage device and generating the terrain image. The processor performs: a process of using an image of the construction site acquired by at least one imaging device installed at a construction site, to acquire a first overhead-view image representing a current terrain of the construction site as viewed from above; a process of acquiring a second overhead-view image acquired by a method other than capturing by the imaging device installed at the construction site, and representing an original terrain of the construction site as viewed from above; and an image synthesis process of superimposing the first overhead-view image and the second overhead-view image to generate a first synthesized overhead-view image.

Information presentation device

A type of an object is determined and the movement direction of the object is predicted on the basis of a sensing result of the object sensed by an on-machine obstacle sensor. Information relating to the object that is the object sensed by the on-machine obstacle sensor and has been determined to have moved to the outside of a sensing range of the on-machine obstacle sensor is immediately deleted from an environment map on the basis of the type and the movement direction of the object. This can properly process information on the object that has gotten out of the sensing range, according to the cause of the object getting out of the sensing range.

Work machine

A construction machine includes a posture sensor provided on a front member of a front work implement. An external environment recognition device detects an object around a main body, and a controller calculates a dead angle range from a recognition range of the external environment recognition device. An assumed movement range in which a moving body is assumed to exist in the dead angle range in a period of time determined in advance is calculated; and a movable range within which the front work implement is movable in a period of time determined in advance is calculated on the basis of the posture information detected by the posture sensor. Preventative control is then performed for preventing contact between the moving body and the front work implement on the basis of the assumed movement range of the moving body and the movable range of the front work implement.

Construction machine

Provided is a work machine that can suppress decrease in work efficiency while reducing the possibility of contacting a worker or a dump truck, etc. A movement range is set in advance so as to avoid entry of a worker or a dump truck, etc. into the set movement range. The work machine performs stop control with clearance for an obstacle having entered the movement range, but performs stop control with relatively small clearance (minimum clearance) for a movement range. Thus, the work machine can reduce the frequency of stopping a body or a work implement and suppress decrease in work efficiency. Since the work machine controls the body or the work implement to stop with clearance when the worker or the dump truck, etc. enters the movement range of the work machine, the work machine can reduce the possibility of contacting the worker or the dump truck, etc.

Work machine having a movable body or a movably mounted work implement and a control unit configured to calculate clearance amounts and comparing them to thresholds

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Tokyo, Japan

Yuho Saito