Hitachi Construction Machinery Co., Ltd.

Yoichi Kowatari

Yoshihiro Inanobe

Kazunori Nakamura

Hidefumi Ishimoto

Kouji Ishikawa

Moritaka Oota

Yasushi Arai

Toichi Hirata

Yukihiro Kawamata

Genroku Sugiyama

Takaaki Ishii

Tsuyoshi Nakamura

Tsukasa Toyooka

Hidenobu Tsukada

Ei Takahashi

Hideo Karasawa

Yoshibumi Fukuda

Kazuhiro Shibamori

Eitaro Ito

Tadatoshi Shimamura

Kouji Fujita

Chieko Onuma

Takashi Kusama

Hiroyoshi Tanaka

Kenta Tsukijishin

Hiroshi Watanabe

Shohei Kamiya

Nobuei Ariga

Yuuki Gotou

Gen Yasuda

Ryo Yumiba

Naokazu Oda

Masanori Ezawa

Motoyuki Yabuuchi

Katsuhiko Shimizu

Tomoaki Hayashi

Shuuhei Kofuna

Gen Tsukuba-Ryo 4-1 Yasuda

A work machine includes: a hydraulic actuator; a closed-circuit pump that is connected to the hydraulic actuator in a closed circuit, and supplies and discharges a hydraulic working fluid to and from the hydraulic actuator; an open-circuit pump that is connected to the hydraulic actuator in an open circuit, and supplies the hydraulic working fluid to the hydraulic actuator; a charge pump; a charge flow path that introduces the hydraulic working fluid delivered from the charge pump to the closed circuit; an excess fluid discharging device that discharges an excess hydraulic working fluid of the closed circuit to the charge flow path; and a controller that controls a delivery capacity of the closed-circuit pump and a delivery capacity of the open-circuit pump. The controller increases the delivery capacity of the open-circuit pump, or reduces the delivery capacity of the closed-circuit pump when a state of a pressure of the charge flow path has transited to be lower than a predetermined pressure threshold from equal to or higher than the predetermined pressure threshold, or when a state of the work device has transited to a state of performing the excavation work from a state of not-performing the excavation work.

Work machine

In an industrial machine, the work safety is further improved by eliminating blind spots from an image displayed on a monitor. A hydraulic excavatorwhich is the industrial machine is equipped with monitoring camerasF,B,L,R mounted in the respective places of a revolving upperstructurein order to capture images for monitoring. A monitordisplays camera imagesF,B,L,R obtained by the cameras as well as an icon imageC of an image illustration of the hydraulic excavator. The camerasF,L,R are mounted at the distal ends of support armsF,L,R to be located in positions jutting from a revolving upperstructure main unitof the revolving upperstructure, so that a hidden area under the underside of a catwalkprovided on the revolving upperstructurefalls within the field of view.

Monitoring image display device of industrial machine

A slewing-type hydraulic excavator has a plurality of camerasfor respectively imaging toward different directions. A view point converting sectionperforms coordinate image data conversion to create overhead view images to look down from an upper position. A composite overhead view image creating sectioncreates a composite overhead view image P arranged around a graphic image of the hydraulic excavator. An interference scope indicating sectionindicates the scope of potential interference on the overhead view image with a surrounding obstacle at respective ground heights at the time of rotating the hydraulic excavator. A display image creating sectionproduces the composite overhead view image P together with interference scope which is displayed on a monitor.

Surrounding monitoring device for slewing-type work machine

A surroundings monitoring system for a working machine prevents its own vehicle shadow from having an influence on the detection of an object existing around the working machine. The surroundings monitoring system for a working machine includes: a monocular camera picks up an image of the surroundings of the working machine. A characteristic pattern extraction unit extracts characteristic patterns in the picked-up image based on a characteristic amount of the image. A shadow profile extraction unit extracts a profile of a region, which can be regarded as a shadow of the working machine in the image, based on the characteristic amount of the image; and an object detection unit detects an obstacle existing around the working machine based on the remaining characteristic patterns obtained by excluding a shadow profile characteristic patterns positioned on the profile extracted by the shadow profile extraction unit from the characteristic patterns.

Surroundings monitoring system for working machine

To recognize an obstacle such as a working face which may be touched by a revolving upperstructure including a height position thereof at the time of a swing control. A plurality of first camerasfor forming bird's eye views which photograph obliquely lower parts of directions different from each other are arranged in a revolving upperstructure, a composite bird's eye viewis displayed on a display, second camerasR,L for photographing through images including corner parts from a rear end of the revolving upperstructureto side parts within a visual field range are arranged in lower part positions of a swing frameof the revolving upperstructureso as to rotate following swing of the revolving upperstructure, and corner part through imagesR,L are displayed on the displayso as to be superimposed on the composite bird's eye view

Surroundings display device for swing working machine

A periphery monitoring device for a work machine includes imaging devices that capture an image of the surroundings of the work machine. An overhead view image is generated from the surroundings of the work machine based upon upper view-point images of the image devices. When generating an overhead view image of an overlap region of first and second upper view-point images relating to the images captured by the first and second imaging devices, the overhead view image generating unit, based upon a height of a virtual monitoring target, sets at least one of a first region in which the first upper view-point image is displayed and a second region in which the second upper view-point image is displayed, and also sets a third region in which a composite display image based upon the first and second upper view-point images is displayed.

Periphery monitoring device for work machine

When a to-be-monitored image exists in an image lacking from a bird's-eye image for surroundings monitoring though the to-be-monitored image is imaged by a camera for monitoring, the to-be-monitored image is securely displayed on a display. CamerasF,B,L,R are provided in a longitudinal direction and in a lateral direction of a dump truck, in playing bird's-eye imagesF,B,L,R acquired by converting view points of a through image imaged by each camera, so as to display a to-be-monitored image in a to-be-monitored image undisplayable area, each through image imaged by each camera is aggregated on one screen by an image aggregating unit, this aggregated screen is scanned by a to-be-monitored image detectorto detect the to-be-monitored image, and the to-be-monitored image is superimposed on a synthetic bird's-eye imagedisplayed on the displayand is displayed.

Surroundings monitoring device of vehicle

The vehicle exterior moving object detection system includes a surrounding-area image input section for capturing images in areas surrounding its own vehicle and delivering the captured images as surrounding-area images, a combined image constructing section for constructing a combined image including a result output from the detection of a moving object by combining the surrounding-area images, and an output section for presenting the combined image to the user. The vehicle exterior moving object detection system includes a movable-component region setting section for setting shapes and layout of movable components of the own vehicle in the surrounding-area images and calculating regions for the movable components of the vehicle, and a moving object detecting section for being supplied with the movable-component regions calculated by the movable-component region setting section and the surrounding-area images from the surrounding-area image input section, performing a process of detecting a moving object, and outputting a detection result.

Vehicle exterior moving object detection system

This invention has an object to assist for traveling operation of a self-propelled industrial machine to display underneath image of the self-propelled industrial machine on a monitor of a display device mounted in a operator's cab. The display device of the self-propelled industrial machine according to the present invention is provided for a dump truck, which comprises cameras having field of view to underneath of the dump truck, a symbol image storage section to store a symbol image which is symbolized the dump truck, a superposing process section to make transparent with a predetermined transparent ratio in the symbol image as a transparent region and to superpose an image taken by the camera on the area corresponding to the transparent region as underneath image, and a monitor mounted in a cab of the dump truck for displaying the symbol image composed by the superposing process section.

Display device for self-propelled industrial machine

A plurality of images captured by a plurality of cameras respectively to create a plurality of upper viewpoint images. Display images are extracted from the upper viewpoint images, and the extracted display images are synthesized to create an overhead image or bird's eye view image of surroundings, which has an image corresponding to an operating machine at a center of the bird's eye view image. When extracting each of the display images, a region of the display image extracted from the upper viewpoint image is expanded beyond the size of a standard extraction region on the basis of the set height of a mating face. Each of the extracted display images is adjusted to the size of the standard extraction region, and synthesized. Thus, any three-dimensional object (obstacle) present near the boundary between display images constituting the bird's eye view image is displayed.

Environment monitoring device for operating machinery

Portion of a display screen for a dump truck with graphical user interface

Portion of a display screen for a self-propelled working machine with graphical user interface

In a server, a standard setting sectionestablishes a standard amount of deposits and a standard amount of money of a maintenance charge in advance; a first calculating sectioncalculates the maintenance charge by multiplying the standard amount of money by a ratio of a deposition level at returning to a standard deposition level; a memory sectionstores in memory an engine operating time, the number of regeneration sequences performed, and a reduction coefficient table; a second calculating sectionestablishes a reduction coefficient based on the reduction coefficient table and reduces the maintenance charge after reduction by multiplying the maintenance charge calculated by the first calculating sectionby the reduction coefficient; and a third calculating sectioncalculates an amount of refund by subtracting the value of the maintenance charge from the value of a maintenance guarantee.

Management system and method for exhaust purification apparatus

Disclosed is a working machine capable of preventing damage to a filter due to excessive accumulation of particulate matter (PM), even under a situation that requires, prior to compulsory regeneration of the filter, moving the machine to a place in which to perform the regeneration work. The working machine that includes an exhaust treatment devicehaving a filterto trap the PM, a regeneration control sectionfor compulsorily regenerating the filter, and a regeneration instruction devicefor instructing the regeneration control sectionto start the compulsory regeneration. Further, when a deposition quantity estimating element determines that an actual PM deposition quantity has reached a deposition alarm level, an alarm devicenotifies an operator that the time has come to start the movement of the working machine to the place of regeneration.

Working machine

An engine lag down control system for construction machinery has a machinery body controller having first, second and third torque control units and a solenoid valve. The first torque control unit controls a torque control valve to a minimum pump torque corresponding to a target number of engine revolutions when a non-operated state of a control device has continued beyond a monitoring time. The second torque control unit controls the torque control valve such that the above-described minimum pump torque is held for a predetermined holding time subsequent to the operation of the control device from the non-operated state. The third torque control unit controls the torque control valve such that from a time point of a lapse of the predetermined holding time, the pump torque is gradually increased on a basis of a predetermined torque increment rate.

Engine lag down suppressing device of construction machinery

Growing community of inventors

Kasumigaura, Japan

Yoichi Kowatari