Hitachi Construction Machinery Co., Ltd.

Hiroshi Ogura

Hiroshi Watanabe

Hidefumi Ishimoto

Kazuo Fujishima

Hiroyuki Adachi

Katsuaki Tanaka

Sadahisa Tomita

Genroku Sugiyama

Hideo Karasawa

Hideto Ishibashi

Junichi Narisawa

Teruo Nakamura

Hideaki Suzuki

Kozo Nakamura

Takayuki Uchida

Kazuhiro Sugawara

Yukihiro Kawamata

Munetoshi Unuma

Masakazu Haga

Mikio Bando

Junsuke Fujiwara

Koichi Shibata

Shinya Yuda

Takao Kurosawa

Osamu Tomikawa

Tooru Kurenuma

Mitsuo Aihara

Shuichi Miura

Kiyoshi Ono

Kenichi Sagiya

Yoshinori Eguchi

Nobuyoshi Hirowatari

Toshiyuki Miyamoto

Yasushi Ochiai

Tsuyoshi Sakyou

Shuji Ohira

Sumio Morita

Yoshiyuki Umeno

Keiji Hatori

Kenya Shyouji

Kouichi Madarame

Kazuo Shitina-Kandatsu-C-101 Fujishima

The maintenance management deviceincludes an error status diagnosis unit, a grace period estimation unit, a maintenance cost estimation unit, and a screen display unit. When the error status diagnosis unithas diagnosed the occurrence of an anomaly, the grace period estimation unitestimates a first grace period leading up to the occurrence of a failure. The maintenance cost estimation unitestimates the cost of corrective maintenance incurred when the failure occurs after the elapse of the first grace period. The screen display unitdisplays a combination of the first grace period and the cost of corrective maintenance. Alternatively, the grace period estimation unitestimates a second grace period over which preventive maintenance may be postponed without a failure.

Maintenance management device for operating machinery

A fleet operation management system for a vehicle traveling on a predetermined travel route comprises: a storage unit () which stores travel route information including the position, height and surface resistance of the vehicle's travel route; a speed prediction unit () which predicts future change in the speed of the vehicle coasting on the travel route based on the current position, the current speed, and the travel route information; and an operation timing calculation unit () which judges which of acceleration, deceleration and coasting should be performed at the current position based on the change in the coasting speed so that the vehicle speed after the lapse of a predetermined time will be within a predetermined range. This configuration makes it possible to properly judge which of the acceleration, the deceleration and the coasting should be performed on the vehicle's travel route from the viewpoint of fuel-efficient operation.

Fleet operation management system

To advance a dump truck quickly and smoothly to a position where target loading work will be performed relative to an excavating machine, the dump truck is placed in loading target position relative to the excavating machine. Geographic position is detected from GPS satellites of a GPS receiver of the dump truck. The position and direction of the geographic position is transmitted to the excavating machine as a target position image. The target position image and an approach route leading to the position are displayed on a dump truck display when the truck thereafter approaches the position. The dump truck thereafter approaches the position, and the truck is driven so that a current position image advances along the approach route to the target position image, whereby the dump truck is placed in the set loading image target position.

Position adjustment assistance system for transportation machine

An operation assist apparatus includes a display device installed in an operator's cab of a construction machine, at which at least operating procedures for the construction machine are displayed with text and illustrations; an image processing device that generates images; and a control device that engages the image processing device to generate an image of an operating procedure corresponding to an operation of the construction machine and engages the display device to display the image generated by the image processing device.

Operation assist apparatus

An excavation support databaseincludes a display tableand a display specifics table, which serve as storage means dedicated for display. The state of a working region per mesh is stored in the display table, and a discriminative display method (display color) is stored in the display specifics tablecorresponding to the state per mesh. Reference is made to the display specifics tableon the basis of the state (height) per mesh, which is stored in the display table, to read the corresponding display color from the display specifics table, thereby displaying the state of the working region in a color-coded manner. Operation support and management realized with this system can easily be employed in different types of working machines in common and can inexpensively be performed with ease.

Work support and management system for working machine

In an electronic control system for a construction machine, a governor control unit, an excavator body control unit, and an electric lever control unit are interconnected for transmission and reception of data. A universal communication line is connected to the governor control unit and is adapted for an interface in conformity with universal communication standards A dedicated communication line is connected to the excavator body control unit and the electric lever control unit and is adapted for an interface in conformity with dedicated communication standards different from the univeral communication standards. A communication relay control unit is used for, converting and transmitting communication data received from one of two systems of the communication lines to be in conformity with the communication standards of the other communication line.

Electronic control systems for construction machine

A working machine maintenance system having a plurality of working machines. A center server is provided that manages maintenance on the plurality of working machines by engaging in data exchange through bidirectional communication with each of the plurality of working machines via a communication line. The working machines each include an operation data storage device, an operation device operated to enter a maintenance work completion, a data transmission device, a data reception device, and a display device at which the maintenance information is displayed. The center server includes a data reception device that receives the operation data, the maintenance work completion data, and the maintenance data that have been transmitted, an operation database in which the operation data are stored, a maintenance database, a calculation device that calculates maintenance timing. and a data transmission device that transmits data related to the maintenance information.

Working machine, failure diagnosis system for work machine and maintenance system for work machines

A working machine failure diagnosis method for performing a failure diagnosis by transmitting and receiving signals through communication devices provided at a working machine and at an information management center, according to the present invention, includes: a first step in which a first signal related to a failure of the working machine is generated at the working machine and the first signal is transmitted to the information management center from the working machine via the communication devices; a second step in which, after the first signal is transmitted, the information management center generates a second signal for identifying a location of the failure based upon the first signal and the second signal is then transmitted from the information management center to the working machine via the communication devices; and a third step in which failure information corresponding to the first signal and the second signal is provided to an operator.

Working machine, trouble diagnosis system of working machine, and maintenance system of working machine

An information display unit is provided inside a cab of a hydraulic excavator and has a display portion capable of displaying plural kinds of information including body information and maintenance information. A screen image has one main screen and a plurality of sub-screens. The main screen displays information regarding one of a plurality of information categories in detail and the plurality of sub-screens respectively correspond to th plurality of information categories. The information category displayed on the main screen can be selected and changed with key manipulation made on an operating portion. As a result, plural kinds of information can be displayed in a combined and selective manner, and an operator is able to confirm the information with higher efficiency.

Information display device and display control device for construction machine

A hydraulic excavator has an area limiting excavation control function for controlling operation of a front working device so as to form a target work plane. A remote control terminal for wirelessly maneuvering the hydraulic excavator is provided in a management office so that entry of setting information of a target excavation plane and remote maneuvering can be performed from the side of the remote control terminal . A display unit for displaying a positional relationship between the hydraulic excavator and the target excavation plane is further provided in the remote control terminal. An operator can remotely set the target excavation plane while looking at a screen of the display unit , and also form the target excavation plane by remotely maneuvering the front working device using a joystick with the aid of a control function of an area limiting excavation controller. As a result, the remote setting of the target excavation plane and the remote maneuvering of the hydraulic excavator can be easily performed.

Remote control system and remote setting system for construction machinery

A display unit for a construction machine is provided which allow for an operator to easily set a target plane or area in works to be performed under automatic control, and to freely change the contents to be displayed regardless of whether the machine is under the automatic control, so that information which the operator wants to see can be promptly displayed.

Display device and display controller of construction machinery

A system having a monitoring function in addition to a control function is able to suppress an increase in the amount of data communication and the communication frequency via a common communication line, and is flexibly adaptable for the addition of a new function without causing mutual interference between control data and monitor data. In particular, a hydraulic excavator includes a first control unit for a prime mover a second control unit for a hydraulic pump a third control unit for control valves and and first and second monitor units A first common communication line for control and a second common communication line for monitoring are further provided as common buses for data communication.

Electronic control system for construction machinery

A setting/display processing section of a control unit comprises means and for computing the positional relationships among a machine body, an external reference and a target excavating surface by using a signal from a setting device and signals supplied from angle sensors when a front device is in a predetermined positional relationship relative to a laser reference surface, and means and for executing picture processing by using the computed positional relationships, and then producing and outputting picture signals to display the positional relationships among the body, the external reference and the target excavating surface. A display device displays an illustration of the body and lines representing respectively the external reference and the target excavating surface on a display section in accordance with the computed positional relationships. As a result, when carrying out excavation continuously over a long distance along a surface at a predetermined depth, a target excavating surface can be easily set using an external reference and a setting error relative to the external reference is less apt to occur.

Target excavation surface setting device for excavation machine, recording medium therefor and display unit

Whether a previously computed valve command value Y&minus;1 is within a neutral zone &plusmn;&agr; is determine. If the determination result is &ldquo;Yes&rdquo;, processing to compute a valve command value for a neutral dead zone is executed. If the determination result is &ldquo;No&rdquo;, processing to compute a valve command value for a driving zone is executed. In the latter case, by using a valve command value X and the previously computed valve command value Y&minus;1, it is determined in which one of acceleration, deceleration/stop, and lever-reversed condition is the operating status, and a maximum setting rate in one of acceleration, deceleration/stop, and lever-reversed condition is computed from a corresponding function &Dgr;Y&equals;fmax (X), etc. Then, a control signal is computed while restraining a change rate of the operational signal to be kept not more than the computed maximum change rate, and a flow control valve is controlled in accordance with the computed control signal. As a result, in a hydraulic drive system for controlling a flow control valve with an electrical operational signal to control the operation of an actuator, the flow control valve can be controlled at an optimum maximum change rate in any operating status of acceleration, deceleration/stop, and lever-reversed condition.

Hydraulic circuit control device of construction machinery

A hydraulic excavator comprises a prime mover , an excavating device , a hydraulic pump rotationally driven by the prime mover, actuators for driving the working device, and control levers for operating control valves for controlling a hydraulic fluid supplied from the hydraulic pump to the actuators. Control units and a display unit are provided on the hydraulic excavator, the control units being associated with the prime mover, the excavating device, the hydraulic pump and the control levers. The control units and the display unit are interconnected via a common communication line to transmit and receive data among them. The control units each include minimum processing means capable of performing computation by using an initial value and executing least necessary processing by itself when no data is transmitted via the communication line. In an electronic control system for a construction machine including a plurality of control units interconnected via a common communication line, therefore, system change including addition, exclusion and replacement of one or more control units can be easily realized.

Growing community of inventors

Ryugasaki, Japan

Hiroshi Ogura