Hitachi, Ltd.

Hitachi Construction Machinery Co., Ltd.

Other

Navitime Japan Co., Ltd.

Asahi Glass Company, Limited

Honda Giken Kogyo Kabushiki Kaisha

Freescale Semiconductor,inc.

Toyo Denso Kabushiki Kaisha

Clarion Co

Eaton Corporation

Hitachi Automotive Systems, Ltd.

Takata Corporation

Agc Inc.

Xanavi Informatics Corporation

Kcm Corporation

Hiroshi Sakamoto

Toshimichi Minowa

Mitsuo Kayano

Tatsuya Ochi

Takashi Okada

Hidekazu Moriki

Atsutoshi Goto

Kazuya Sakamoto

Hiroaki Tanaka

Yasuhiro Yuasa

Yasutaka Tsuruga

Shinji Ishihara

Tetsuo Matsumura

Masato Imai

Yuriko Kaida

Hisami Nakano

Ryu Narikawa

Naoyuki Ozaki

Yusuke Suzuki

Yoshiyuki Tsuchie

Shigeki Tokita

Masatoshi Hoshino

Manabu Edamura

Masao Sakata

Mariko Mizuochi

Shuichi Tanaka

Nobuyuki Akatsu

Hiroyuki Kobayashi

Takaaki Ishii

Tadahiko Miyoshi

Hisashi Ando

Ko Soeno

Akio Yamamoto

Hiroshi Kuroiwa

Shiho Izumi

Daisuke Goto

Akihiro Narazaki

Akira Misumi

Hiroshi Ohnishi

Eiji Shidoji

Yasuhiko Kanari

Takahira Miyagi

Hiroyuki Yamada

Yasuhiro Ikeda

Takehito Ogata

Takaaki Chiba

Shin Kikuchi

Toshio Doi

Hiroyuki Azuma

Takaomi Nishigaito

Keisuke Onishi

Sunao Ishihara

Tomio Iizuka

Yuuichi Kurosawa

Hiroshi Fukushima

Toshiharu Kumagai

Isamu Sunaga

Kenji Tanaka

Shinya Imura

Kouji Ishikawa

Yuji Yamamoto

Ryoso Masaki

Hidetoshi Satake

Masahiko Ibamoto

Kenji Nakamura

Takaaki Suzuki

Takeshi Inoue

Yoshiyuki Yoshida

Tadashi Osaka

Takashi Emura

Koichiro Tanikoshi

Yoshiyuki Ono

Hirotsugu Yamamoto

Takao Kawamura

Mikio Bando

Masaki Yoshikawa

Masashi Seimiya

Takuya Naka

Masayuki Takahashi

Koji Nakagawa

Taizo Miyazaki

Satoru Takaki

Tomoyuki Hanyu

Teruki Igarashi

Kinya Fujimoto

Hironori Kodama

Shigeki Kato

Reo Usui

Naoki Hayakawa

Sakae Sugimori

Kenichi Ebata

Takayuki Matsunaga

Toshihiro Akiwa

Hatsuo Kawada

Nobuya Ishii

Junichi Kakuta

Noriyuki Furuichi

Mikio Ueyama

The invention of the present application intends to provide a work machine that can improve the work performance by keeping the work state of work equipment conforming to the intention of an operator in machine control for causing the work equipment to follow an excavation target surface. For this purpose, a controller determines the work state of the work equipment on the basis of an operation input amount inputted from an operation input device and the posture of the work equipment with respect to the target surface, computes a range of an action command value of actuators in which the work state determined is kept, and corrects, within the range, the action command value of the actuators to make the distance between the work equipment and the target surface small.

Work machine

The invention of the present application has as its object the provision of a work machine that is equipped with a function to prevent a work device thereof from going into an entry prohibited area and can satisfy both working precision and working efficiency of the work device. A controller is therefore configured to start work range limiting control to decelerate or stop an action of a machine main body or the work device when a distance between a monitor point set beforehand on the work device and the entry prohibited area decreases to a first distance, to end the work range limiting control when the distance between the monitor point and the entry prohibited area increases to a second distance greater than the first distance, and to change the second distance according to an operation amount of an operation device.

The present disclosure provides a work machine capable of providing operation assistance matching an operator's intent in consideration of a rotating motion. A control device includes a storage device and a central processing device. The storage device has stored therein construction target information for a work device and determination criteria information for the work content of the work device based on the amount of operation of a rotating device. The central processing device, based on the position and attitude of the work device detected by a sensor, the amount of operation of the rotating device detected by an operation amount detection device, and the determination criteria information stored in the storage device, determines the work content of the work device, calculates a correction value for the construction target information based on the determined work content, and controls a drive device based on the construction target information and the correction value.

Work machine including a boom, an arm and a bucket, and for performing work including finishing and rough excavation of a flat surface or an inclined surface of a construction target

A work machine includes: an informing device that informs an operator; an input device for inputting predetermined information; a notification device that gives a notification to a worker around the work machine; a controller; and a communication device that communicates with a mobile terminal carried by the worker. The controller determines whether or not an approval request for requesting approval of entry into a movable range of the work machine transmitted from the mobile terminal when the worker around the work machine operates the mobile terminal has been received; inform, by using the informing device, that the approval request has been received when it is determined that the approval request has been received; determine whether or not approval operation of approving entry into the movable range has been performed on the input device; set an interpersonal communication level representing a degree of interpersonal communication between the operator and the worker depending on whether or not the approval request has been received and whether or not the approval operation has been performed; decide a mode of notification in accordance with the interpersonal communication level; and give a notification in the mode of notification by using the notification device.

A site management system manages the positions of workers and work areas of work machines. The workers can recognize the work areas of the work machines at a work site in which the work machines and the workers carry out work. A site management device is connected to a worker terminal carried by a worker and a work machine processor is mounted on a work machine. The site management device generates worker informationon the basis of a signal transmitted from the worker terminal and generates work machine informationbased on a signal transmitted from the work machine processor. Work area informationincluding the position and the work area of a work machine is generated on the basis of the pieces of informationandand a work area notification signal is transmitted with the work area information to the worker terminal device.

Site management system and work machine

A work machine includes a controller that executes a semi-automatic control to correct an operation amount indicated by an instruction given by operation devices. The controller is configured to make a compaction determination to determine whether or not a bottom surface of a bucket is being pressed against a ground; and to further correct an operation amount having been corrected by the semi-automatic control, such that a force that the bucket applies to the ground increases if the bottom surface of the bucket is determined as being pressed against the ground.

Compaction control of work machine

A working machineincludes a design data obtainment unit, a topography measuring device, and a controller. The controllerextracts peripheral area shape data from the design data in the construction-site coordinate system, maps similar shape portions between the extracted peripheral area shape data and the current topography data in the current topography coordinate system, calculates a coordinate transformation matrix to transform from the current topography coordinate system to the construction-site coordinate system so that a difference in coordinate values of the mapped shape portions is minimized, and transforms the self-position and posture of the working machineand the current topography data from coordinates in the current topography coordinate system to coordinates in the construction-site coordinate system using the calculated coordinate transformation matrix.

Working machine

In a hydraulic excavator including a main controller that can execute area restriction control, the main controller is configured to calculate an operation velocity Vix of a front work device in a machine body coordinate system. The controller is further configured to calculate a movement velocity (dragging velocity) of a machine body in a gravity coordinate system and correct a direction of a calculated target velocity vector upward away from a construction target surface when generation of dragging is detected during execution of the area restriction control based on the calculated operation velocity of the front work device and the calculated movement velocity of the machine body.

A work machine includes a plurality of actuators that drive a work device; a posture sensor that senses postural data about the work device; and a controller having a degree-of-proximity calculating section that computes a degree of proximity that is an index value indicating proximity between an intrusion prohibition region and the work device on the basis of positional data about the intrusion prohibition region and the postural data. A command section executes, when the proximity specified by the degree of proximity is closer than proximity specified by a degree-of-proximity threshold, operating area limiting control to decelerate at least one of the plurality of actuators such that an intrusion of the work device into the intrusion prohibition region is prevented. History of the data about the degree of proximity calculated at the degree-of-proximity calculating section is stored and the degree-of-proximity threshold is altered on the basis of the history data.

A work machine capable of assisting in an operator's operation to allow a work tool move along a design surface indicating a target shape of an object to be worked irrespectively of an angle of the design surface and a posture of a work implement is provided. A controller determines an excavation actuator in charge of an excavation action and determines an alignment actuator in charge of an alignment action for a work tool out of a plurality of actuators on the basis of the design surface set by a work execution target setting device and the posture of the work implement measured by a work implement posture/position measurement device, determines a target velocity of the excavation actuator on the basis of operation signals outputted from an operation device, and limits a target velocity of the alignment actuator in a direction in which the work tool approaches the design surface.

A construction machine that can make a depressing force of a bucket during compaction work to be uniform without requiring an operator to perform a complicated operation is provided. A controllerdetermines whether or not compaction work is in progress, calculates a front distance R that represents a distance between a rotational pivot of a boomand a predetermined position B in a back surface of a bucket, determines a target velocity of the bucket such that a velocity with which the bucket approaches a leveling target surface decreases with increasing values of the front distance, and, during the compaction work, notifies the operator of details of an operation of operation devicesandfor achieving the target velocity of the bucket or controls hydraulic actuatorstoso as to achieve the target velocity of the bucket.

Construction machine

To provide a work machine that can maintain the construction precision of semi-automatic control irrespective of excavation depths and differences in soil nature. A controller acquires soil-nature information on the basis of an operation command given to a work implement, a bucket-claw-tip position outputted from a bucket-position measuring device, and a drive load of the work implement outputted from a load measuring device; generates a soil-nature map on the basis of the bucket-claw-tip position, and the soil-nature information; calculates an estimated load that is an estimate of an excavation load on the basis of the soil-nature map and a bucket-claw-tip target position; and corrects the operation command in accordance with the estimated load.

A hydraulic excavator including a controller that calculates the positional relationship between a bucket and a target surface and a display device that displays the positional relationship between the bucket and the target surface includes an actuator state sensor that detects the pressure of a hydraulic cylinder. The controller calculates the velocity of the bucket based on the position of a work implement and the operation amount of an operation device and changes the contents of informing by the display device according to the velocity of the bucket, the distance between the bucket and the target surface, and the pressure of the hydraulic cylinder. The display device displays the contents of informing changed by the controller.

The line-of-sight direction of an operator is estimated on the basis of the posture of a front work device detected by a posture sensor, and plural display regions are set on a screen of a transparent display on the basis of the estimated line-of-sight direction of the operator. Then, the display position of a display image is calculated in such a manner that the display position is located in the display region corresponding to the kind of the display image in the set plural display regions. When the positions of the display regions on the display device change due to change of the line-of-sight direction of the operator, the display position of the display image is held if the display image is located in the display region corresponding to the kind of the display image also after the change, and a new display position of the display image is calculated in such a manner that the new display position falls within the display region corresponding to the kind of the display image again if the display image gets out of the corresponding display region after the change.

Provided are a work point position computing section configured to compute the relative position of a work point set on a bucket with respect to an upper swing structure on the basis of posture information, a target surface setting section configured to set a target surface as a target of excavation work on the basis of design surface information, a primary operation determining section configured to determine which of operations of a boom and an arm is a primary operation as a main operation when the work point is moved along the target surface, and a recommended operation computing section configured to compute a recommended operation amount and a recommended operation direction of a secondary operation as another operation different from the primary operation in the operations of the boom and the arm according to an operation amount and an operation direction of the primary operation.

Growing community of inventors

Hitachi, Japan

Hiroshi Sakamoto