Hitachi Construction Machinery Co., Ltd.

Taiki Aizawa

Yuichiro Morita

Koichi Shibata

Kouichi Shibata

Shinji Nishikawa

Takenori Hiroki

Naoki Hagiwara

Yasunori Ota

Manabu Sugiura

Katsumasa Uji

Hisashi Tago

Yoshiyuki Takigawa

Daiki Machida

Kouhei Hashimoto

A work machine includes: a machine body; an actuator attached to the machine body; an operation device used to operate the actuator; an operation sensor that senses an operation of the operation device; a photographing device that photographs surroundings of the machine body; a video data recording device that records video data including video photographed by the photographing device; a controller that controls the video data recording device; and an object sensor that senses an object in the surroundings of the machine body. The controller determines whether or not a recording and retaining condition including a condition that an object is present in the surroundings of the machine body and a condition that the operation device is operated is satisfied on the basis of a result of sensing in the object sensor and a result of sensing in the operation sensor, and makes the video data recording device record and retain the video data when the recording and retaining condition is satisfied.

Work machine for determining condition for recording and retaining video

To provide an identification system for a work machine which is capable of preventing a setting error, the identification system for a work machine includes: a main control unit to control the entirety of a work machine; and a plurality of power control units to control components of the work machine. The main control unit acquires information about the entire vehicle body of the work machine. Each of the power control units acquires different information about a state of one of the components from that acquired by the other power control units, on the basis of a installation site of the power control unit installed on the work machine. In addition, the power control unit sets a function of the power control unit on the basis of the information about the state and the information about the entire vehicle body.

Identification system for work machine

A hydraulic excavator () includes a hydraulic pump () driven by an engine (), an electromagnetic proportional valve () for hydraulic pump that adjusts pump torque of the hydraulic pump () in response to a pump torque target value (Tp), a hydraulic actuator operated by a delivery pressure of the hydraulic pump (), a motor generator () connected to the engine (), and a controller () configured to calculate the pump torque target value (Tp). The controller () acquires a pump torque adjustment amount (Qadj) based on a deviation (&#x394;AH) between a current integrating value (AH) acquired by integrating a value of a current flowing into the motor generator () when the hydraulic actuator is driven and a current integrating reference value (AH).

Construction machine

A maintenance device for a construction machine includes: an abnormality detection means for detecting abnormality of an apparatus installed on the construction machine; an abnormality information output means for outputting abnormality information about the apparatus detected by the abnormality detection means; and a maintenance mode setting means for setting a maintenance mode for performing a maintenance work of the apparatus, wherein the abnormality information output means for eliminating negation or output of the information, if any abnormality of the apparatus is detected in a state in which the maintenance mode is set by the maintenance mode setting means.

Maintenance device for construction machine

An abnormality control device for a construction machine includes: an abnormality detection means for detecting abnormality of an apparatus installed on the construction machine; an abnormality information output means for outputting abnormality information about the apparatus detected by the abnormality detection means in an ordinary mode, and negating or avoiding outputting the abnormality information about the apparatus detected by the abnormality detection means in a maintenance mode; and a mode switch means for determining a content of maintenance work and switching a work mode between an ordinary mode and a work mode according to the content of work or a situation.

Abnormality information control device for construction machine

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Kasumigaura, Japan

Taiki Aizawa