Hitachi Construction Machinery Co., Ltd.

Hitachi, Ltd.

Nissan Motor Company Limited

Shiho Izumi

Kouji Ishikawa

Shinya Imura

Manabu Edamura

Hidetoshi Satake

Shinji Nishikawa

Yasuhiko Kanari

Shuuichi Meguriya

Satoru Kuragaki

Hidekazu Moriki

Ryu Narikawa

Naoki Hayakawa

Satoru Kaneko

Shinji Ishihara

Hiroaki Amano

Tomoaki Kaneta

Daito Sakai

Hiroshi Kuroda

Hiroyuki Yamada

Takao Kojima

Kouichi Shibata

Hiroki Takeuchi

Ryuu Narikawa

Tarou Akita

Kohei Hiromatsu

Toshimichi Minowa

Hiroshi Sakamoto

Hideki Miyazaki

Tatsuyuki Yamamoto

Tokuji Yoshikawa

Takatoshi Ooki

Hiroshi Kondoh

Teruki Igarashi

Akira Kanazawa

Kenta Katsuhama

Shinichi Kotake

Seiji Ishida

Kazuaki Takano

Hiroshi Shinoda

Yusuke Kajita

Kazuhiko Satou

Manabu Sugiura

Takahiko Kurose

Kazuya Motegi

Kenta Nakagi

Yasutaka Tsuruga

Toshio Manaka

Yutaka Takaku

Kazuhiko Sato

Hiroshi Takenaga

Takashi Ikimi

Kazuo Fujishima

Yuichiro Morita

Takaaki Chiba

Mitsuhide Sasaki

Mariko Mizuochi

Tsutomu Udagawa

Masataka Sasaki

Masafumi Hita

Hideki Nihei

Hiroto Morizane

Terumi Nakazawa

Yoshiyuki Tsuchie

Kazuto Nakamura

Yasunori Ota

Hideto Ishibashi

Ryohei Yamashita

Nobuyuki Ueki

Akira Nakayama

Shinya Okumura

Yasuo Matsunaga

Hidehiko Sugita

Shigeru Akaishi

Yoshiyuki Takigawa

Mikito Tsubota

Satoru Kaneka

Hiroshi Kurodai

Kenichi Mitzuishi

Shinichirou Yoshida

Hyejeoung Lee

Nobuo Masano

The invention of the present application intends to provide a completed-work information processing system that can generate terrain profile data that is easy to associate with the contents of work and a work area, on the basis of working history data that can be acquired in work execution by a work machine. For this purpose, a computation device computes movement loci of a work device when the work device is executing work of the ground and acquires working information from a working information acquiring device when determining that the work device is executing the work of the ground, records data in which the working information is associated with the movement loci of the work device, as the working history data, and outputs the terrain profile data to which the working information is added, with use of a movement locus assumed to be the current terrain profile among the movement loci of the work device included in the working history data and the working information associated with the movement locus assumed to be the current terrain profile.

Completed-work information processing system

A work machine management system includes a terrain profile data generating system configured to generate terrain profile data representing a finished shape produced by a work device of a work machine, on the basis of a sensing result of a posture sensor that senses a posture of the work machine. The terrain profile data generating system computes a trajectory of the work device on the basis of the posture of the work machine, computes information about a plane constituting the trajectory of the work device on the basis of the trajectory, generates construction history data by recording positional information of the trajectory of the work device and the information about the plane constituting the trajectory for each of a plurality of grids obtained by dividing a predetermined area in a lattice manner, and generates the terrain profile data on the basis of the positional information of the trajectory of the work device and the information about the plane constituting the trajectory, the positional information and the plane information being included in the construction history data.

Work machine management system

A construction machine includes an angle measuring apparatus that sense acceleration and angular velocities of installation portions on a machine body and a work implement and that compute angles of the installation portions relative to a reference plane based on sensing results, and a controller that executes operation assistance of a work implement based on postural information on the machine body and the work implement computed on the basis of the angles from the angle measuring apparatus. The controller computes second required accuracy of angle computation by the angle measuring apparatus on the basis of first required accuracy set for the operation assistance, determines whether the state of the machine body has changed from an active state to a stopped state on the basis of the sensing results of the angle measuring apparatus, determines whether the computation accuracy of the angle measuring apparatus satisfies the second required accuracy, and stops the operation assistance of the work implement or gives a warning in a case where the state of the machine body has changed to a stopped state, and where the computation accuracy fails to satisfy the second required accuracy.

Construction machine

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.

Work machine

A controller provided to a work machine stores a plurality of mask ranges which are used to select positioning satellites to be used by a receiver to compute a position of an antenna and are set with reference to an antenna on the basis of the postures of a work device and an swing structure. The controller computes each of a plurality of positioning precisions on the basis of satellite related data on the positioning satellites each of which is selected through use of each of the plurality of mask ranges and satellite related data on the positioning satellites which are selected through use of none of the plurality of mask ranges. The receiver computes the position of the antenna on the basis of satellite signals of the positioning satellites selected in a case of having the highest positioning precision out of the plurality of computed positioning precisions.

A controller sets, as a satellite mask range, a range for which a work implement can become an obstacle when an antenna receives positioning signals from a plurality of positioning satellites on the basis of a position at which the antenna is installed, a movable range of the work implement, a posture of an upper swing structure, and an azimuth angle of the upper swing structure. The controller cancels the setting of the satellite mask range in a case where it has been determined, on the basis of satellite positioning condition data acquired from a receiver, that the setting of the satellite mask range leads to reduced precision of positioning computation by the receiver. In a case where the setting of the satellite mask range has been canceled, the receiver computes the position of the upper swing structure on the basis of the positioning signals transmitted from the plurality of positioning satellites.

Work machine configured to set a mask range in a field of vision over an antenna for which part of the work machine can become an obstacle when receiving positioning signals from satellites

A controller determines whether or not a work device is in a ground contact state, by using detection data of a pressure sensor and at least one balance relation between forces or moments acting on the work device, and generate partial shape data of a work object formed by the work device, on the basis of a movement locus of a monitoring point set to the work device and an external shape of the work device in a ground contact period in which the work device is determined to be in the ground contact state, and update the present-condition shape data of the work object on the basis of the partial shape data.

In a hydraulic excavator including a controller configured to calculate the magnitude of a position difference in a height direction between a construction target surface and a front work implement on the basis of the position of the construction target surface, the position of a machine main body which is calculated by a GNSS receiver, and the posture of the front work implement which is detected by a posture sensor. The controller records snapshot data of information about an operation sensor, a pressure sensor, the posture sensor, the GNSS receiver, and a radio in a predetermined period that is determined based on a time at which the magnitude of the position difference exceeds a predetermined value when the magnitude of the position difference exceeds the predetermined value, and diagnoses a cause of the magnitude of the position difference exceeding the predetermined value, on the basis of the snapshot data.

Work machine with machine control that stores snapshot data for equipment abnormality diagnosis

A position/posture computing section determines that an azimuth of an upper swing structure calculated at a GNSS receiver is of low quality when at least one of a posture angle of the upper swing structure acquired at a machine-body IMU and a posture angle of a front work implement acquired at a boom IMU is equal to or larger than a threshold value, executes a bias removal computation on the basis of the quality of the azimuth and the azimuth of the upper swing structure calculated at the GNSS receiver, calculates a corrected azimuth of the upper swing structure on the basis of the azimuth of the upper swing structure calculated at the GNSS receiver, and an angular velocity of the upper swing structure from which a gyro bias has been removed, and computes a three-dimensional position and posture of the front work implement by using the corrected azimuth.

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

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

An installation error of a machine-body inertial measurement unit around a first axis is computed on a basis of sensing results of inertial measurement units of a front work implement, and the machine-body inertial measurement unit obtained while the upper swing structure is in a first calibration posture in which the upper swing structure faces a predetermined direction relative to a lower travel structure; and an installation error of the machine-body inertial measurement unit around a second axis is computed on a basis of a sensing result of the machine-body inertial measurement unit obtained while the upper swing structure is in a second calibration posture in which the upper swing structure is swung by 90 degrees relative to the lower travel structure from the first calibration posture, and the installation error of the machine-body inertial measurement unit around the first axis.

A construction assisting system including a controller that performs construction assistance processing on the basis of positional relation between a worker and a hydraulic excavator, the construction assisting system including: an approach intention detecting device that detects an intention of the worker to approach the hydraulic excavator; an approach intention presenting device that presents a detection result of the approach intention detecting device to an operator of the hydraulic excavator; and an approach confirmation obtaining device that obtains a confirmation state of the operator of the hydraulic excavator for contents presented by the approach intention presenting device, the controller performing the construction assistance processing on the basis of position information of the worker when the operator of the hydraulic excavator denies the approach of the worker or when the operator of the hydraulic excavator does not confirm the intention of the worker to approach. It is thereby possible to perform construction assistance according to the intention of the worker, and further improve safety of the worker while suppressing a decrease in work efficiency.

Construction assisting system and work machine

An articulated-type front work implement has a boom, an arm, and a bucket that are driven members coupled to each other; a boom cylinder, an arm cylinder and a bucket cylinder that are hydraulic actuators each of which drives a corresponding one of the plurality of driven members on the basis of an operation signal; a plurality of operation members each outputting the operation signal to one of the hydraulic actuators; and a controller that outputs the operation signal to at least one of the plurality of hydraulic actuators or executes area limiting control of correcting the output operation signal such that the front work implement moves on a target surface preset for a work target of the front work implement or within an area above the target surface, and corrects the operation signal on the basis of information related to operation of the hydraulic actuator.

A coordinate conversion system including a controller that converts geographic-coordinate-system coordinates of a certain point into site-coordinate-system coordinates includes: an image-capturing device that captures an image of a reference point; and a GNSS antenna that receives a navigation signal. The controller calculates geographic-coordinate-system coordinates of the image-capturing device on the basis of the navigation signal received at the GNSS antenna, and a distance between the image-capturing device and the GNSS antenna; calculates a distance and direction from the image-capturing device to the reference point by performing image processing on the image of the reference point captured by the image-capturing device; calculates the geographic-coordinate-system coordinates of the reference point on the basis of the calculated distance and direction from the image-capturing device to the reference point, and the calculated geographic-coordinate-system coordinates of the image-capturing device; and calibrates the coordinate conversion parameter on the basis of the calculated geographic-coordinate-system coordinates of the reference point, and the site-coordinate-system coordinates of the reference point.

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Hitachinaka, Japan

Shiho Izumi