Hitachi Construction Machinery Co., Ltd.

Hitachi, Ltd.

Hitachi Construction Machinery Tierra Co., Ltd.

Olympus Corporation

Hitachi Automotive Systems, Ltd.

Shinya Imura

Kouji Ishikawa

Shinji Nishikawa

Hidekazu Moriki

Hiroaki Amano

Seiji Hijikata

Takaaki Chiba

Hidetoshi Satake

Shiho Izumi

Yasutaka Tsuruga

Masafumi Hita

Takatoshi Ooki

Kento Kumagai

Tomoaki Kaneta

Genroku Sugiyama

Seiji Ishida

Akihiro Narazaki

Shinjiro Yamamoto

Ryohei Yamashita

Shinji Ishihara

Akira Kanazawa

Makoto Yamakado

Manabu Edamura

Ken Takeuchi

Masato Abe

Yuho Saito

Masatoshi Hoshino

Hiroyuki Yamada

Tatsuyuki Yamamoto

Masaru Ito

Katsuaki Kodaka

Takanori Yokoyama

Kunihiko Tsunedomi

Masamichi Ito

Kouji Shiwaku

Shinjirou Yamamoto

Ryouhei Yamashita

Tatsuya Yoshida

Shoji Sasaki

Kotaro Shimamura

Takehiko Kowatari

Yuichiro Morita

Kazuo Fujishima

Yusuke Kajita

Kazushige Mori

Ryu Narikawa

Yoshiyuki Tsuchie

Yuichi Ogawa

Norikazu Matsuzaki

Kenichiro Nakatani

Itaru Naya

Shin Fujiwara

Chiaki Takahashi

Hiroshi Sakamoto

Satoshi Nakamura

Atsushi Yokoyama

Masahito Kobayashi

Kenichiro Matsubara

Junya Takahashi

Toshimasa Kawai

Takuya Naka

Mariko Mizuochi

Tsutomu Udagawa

Masaru Yamasaki

Hirotaka Oikawa

Yasuhiko Kanari

Masaki Kanai

Norihisa Yanagihara

Mitsuo Sonoda

Atsushi Okuyama

Ryuu Narikawa

Masato Soma

Daisuke Yamamoto

Kohei Itoh

Koji Shiwaku

Masatoshi Morikawa

Masamichi Itou

Hiroki Ishii

Norkazu Matsuzaki

Kunya Takahashi

A working status indicating a status related to the present work of a hydraulic excavatoris determined on the basis of operation signals output from a control lever, posture information output from inertial measuring devicesto, load information output from pressure sensorsand, and a work area set by a display input device, an operation form indicating contents of an operation in operation correction control of a front work implementis decided from a plurality of operation forms set in advance, according to the determined working status, and the operation correction control is performed such that the front work implement moves according to the operation form. Thus, an appropriate assisting operation can be performed in machine control, so that the work accuracy can be improved.

Work machine

An object of the present invention is to provide a work machine that can increase the operation speed of an actuator by a regenerating function while ensuring accuracy of position control of the actuator. For this purpose, a controller computes a target actuator supply flow rate by subtracting a regeneration flow rate from a target actuator flow rate, computes a target flow control valve opening amount on the basis of the target actuator supply flow rate, computes a target pump flow rate equal to or more than the sum of a plurality of the target actuator supply flow rates, controls flow control valves according to the target flow control valve opening amount, and controls a hydraulic pump according to the target pump flow rate.

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 work machine control system includes: a monitoring apparatus that detects a position and an action of a person in a monitored area set around a hydraulic excavator; and a controller that generates a control signal for limiting an action of the hydraulic excavator on the basis of a positional relation between the hydraulic excavator and a detected person detected by the monitoring apparatus, and controls the hydraulic excavator on the basis of the control signal. The controller determines which of a cooperating worker and a non-cooperating worker the detected person is, on the basis of an action of the detected person; and changes an allowable velocity of the work machine at a time of limiting an action of the work machine on the basis of a result of the determination or on the basis of the result of the determination and the action of the work machine.

Work machine control system

Provided is an on-site monitoring apparatus and an on-site monitoring system that can appropriately set an area to be subjected to on-site monitoring. The on-site monitoring apparatus includes warning devicesandthat output a warning, peripheral object detection devicesandthat detect a position of a partition object, work area input devicesandthat receive an input of information indicating boundaries AB and BC to be arranged with a partition object, and control devicesand. The control devicesandincludes operation environment determination sectionsandthat determine, for each boundary, whether the boundary is an arranged boundary where the partition objectis arranged at a position corresponding to the boundary or an unarranged boundary where the partition objectis not arranged at a position corresponding to the boundary, and warning content determination sectionsandthat output a warning by the warning devicesandwhen at least one unarranged boundary is present.

On-site monitoring apparatus and on-site monitoring system

The present invention intends to provide a work machine that can execute speed control of an actuator and torque control of a swing motor by a simple configuration at the time of combined operation to simultaneously drive the swing motor and the other actuator. For this purpose, a controller calculates a pump target flow rate on the basis of an actuator target flow rate and a swing target flow rate and calculates a target meter-in opening area of an actuator directional control valve on the basis of the actuator target flow rate, a pump pressure, and an actuator meter-in pressure. The controller calculates target torque of the swing motor on the basis of the input amount of operation devices and output values of posture sensors and calculates a swing target meter-out pressure on the basis of the target torque and a swing meter-in pressure. The controller calculates a target meter-out opening area of a swing directional control valve on the basis of the swing target meter-out pressure and a swing meter-out pressure.

An object of the present invention is to provide a work machine that makes it possible to perform, with a simple configuration, speed control of respective actuators and thrust control of a particular actuator that regenerates the flow of a return fluid, at the time of combined operation to simultaneously drive the particular actuator and another actuator. For this purpose, a controller calculates a target thrust that is a target value of a thrust of the particular actuator on the basis of an input amount of an operation device and an output value of a posture sensor, calculates a target meter-out pressure that is a target value of a meter-out pressure of the particular actuator on the basis of the target thrust and a meter-in pressure of the particular actuator, and calculates a regeneration control valve target opening area that is a target value of an opening area of a regeneration control valve on the basis of the target meter-out pressure and the meter-out pressure of the particular actuator.

There is provided a work machine which can improve accuracy of control of an actuator when a pressure difference between a hydraulic pump and the actuator is large and the demanded flow rate of the actuator is small. An auxiliary flow rate controller is configured such that an opening area of a main valve changes between a maximum opening area and zero according to the opening area of a pilot variable restrictor when the opening area of the pilot variable restrictor is equal to or more than a predetermined opening area and that the opening area of the main valve is zero irrespective of the opening area of the pilot variable restrictor when the opening area of the pilot variable restrictor is less than the predetermined opening area.

To provide a work machine that enables enhancement of shaping accuracy near a boundary line between two adjacent target surfaces. A controllerextracts, from among a plurality of target surfaces, a second target surface Sthat is a target surface adjacent to a first target surface S, calculates a boundary line Lbetween the first target surface Sand the second target surface S, and, prior to a work toolpassing the first boundary line L, corrects a control signal for a posture control actuatorsuch that the angular difference Ebetween a reference line Lset on the work tooland the boundary line Lbecomes small.

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.

Provided is a control system for a work machine that allows a worker in the operation around the work machine to safely approach the work machine. The control system for a work machine includes: a work machineincluding a work implement, a lock mechanismfor the work implement, a lock controllerthat controls the lock mechanism, and a communication device; and a communication terminalthat is able to communicate with the communication deviceof the work machine. The lock controllercontrols the lock mechanismso as not to be released from a locked state in a case receiving a lock demand signal from the communication terminal, and controls the lock mechanismso as to be released from the locked state in a case receiving a lock demand cancellation signal from the communication terminal

Control system for work machine

There are provided: a monitoring apparatus that detects an obstacle located around a hydraulic excavator, and outputs obstacle information; and a controller that calculates an operation limiting command for limiting operation of the hydraulic excavator in accordance with an intrusion prohibited area set on the basis of a result of comparison between a movable range of the hydraulic excavator and a monitoring range of the monitoring apparatus and in accordance with the obstacle information from the monitoring apparatus. Thereby, it is possible to appropriately set an intrusion prohibited area, and reduce detection failures and detection errors.

Intrusion monitoring control system and work machine

The present invention intends to provide a risk management system that can accurately extract information necessary for analysis of a variety of accidents in which a machine is involved. For this purpose, a controller calculates a main risk that is the degree at which a main factor of an accident contributes to the occurrence of the accident on the basis of an evaluation value of the main factor, and calculates a subsidiary risk that is the degree at which a subsidiary factor of the accident contributes to the occurrence of the accident on the basis of an evaluation value of the subsidiary factor. Furthermore, the controller calculates, as the occurrence risk of the accident, an integrated risk that has a value equal to or larger than the main risk and increases or decreases at a degree lower than the degree of increase or decrease in the subsidiary risk, and, when the integrated risk has exceeded a predetermined threshold, causes a recording device to record parameters measured by measuring devices in a certain time period including a clock time at which the integrated risk has exceeded the predetermined threshold.

Risk management system

Provided is a work machine capable of eliminating the inconvenience from the operator of the work machine as much as possible while deterring a contact between the work machine and workers, and suppressing a decrease in productivity of the work machine. A work machineincludes: an identification information recognition deviceconfigured to recognize identification information on a person who enters a predetermined region R around the work machine; and a controllerconfigured to control the work machine in accordance with the identification information. When a person enters the predetermined region R under the condition that the work machineis ready for operation, the controllercounts the number of times the person enters the predetermined region R as the number of approaches for each person distinguished with the identification information, and controls the work machinebased on the counted number of approaches in accordance with the identification information of the person who is in the predetermined region R.

A construction management device computes a risk indicative of a degree of danger with which an accident occurs on the basis of information relating at least to a position of a worker measured by a worker position measuring device and a worker biometrical information measuring device, information relating at least to a position of a hydraulic excavator measured by a machine body position measuring device, a machine body posture measuring device, a machine front implement posture measuring device, and a machine operator biometrical information measuring device, personal information on a worker and an operator registered in a worker information registration device, and information on a construction environment from an environment information registration device, and outputs the computed risk as a coordinate risk associated with coordinates of the construction environment to a risk display device such that the computed risk is displayed in a map format on the risk display device.

Construction management system and work machine

Growing community of inventors

Toride, Japan

Shinya Imura