Hitachi, Ltd.

Nippon Kokan Kabushiki Kaisha

Komatsu Corporation

Nireco Corporation

Nkk Corporation

Vitanet Japan, Inc.

Fujifilm Corporation

Hitachi Vlsi Engineering Corp.

Hitachi Hokkai Semiconductor Ltd.

Fuji Toyuki Kabushiki Kaisha

Takeo Yamada

Masanori Ogino

Miyuki Ikeda

Seigo Ando

Katsujiro Watanabe

Tomoyuki Kobayashi

Gousuke Nakashima

Tsuneo Fujikura

Akio Yamamoto

Shigeru Mori

Fumio Inoue

Yoshiki Kami

Yoshiaki Iwahara

Akira Kazama

Takahiko Oshige

Toshiyuki Kimoto

Naoki Harada

Takahiko Fujiwara

Ryosuke Okui

Takeshi Yamamoto

Takashi Azuma

Shigeru Arai

Tomotoshi Ishida

Toru Matsuyama

Takeshi Takaura

Yuto Fujii

Masanori Oguino

Kazuo Kunioka

Shingo Kawai

Hiroshi Arai

Jun Koizumi

Hiroaki Miyahara

Yoshihiro Kawase

Katsuhiko Koike

Yasushi Kaneda

Yoshihiro Arakawa

Mitsuya Otonari

Shuichi Takano

Shinichiro Ohtaka

Masaru Yoshida

Toyokazu Teramoto

Shozo Yodo

Isao Ono

Norihiro Kuzuu

Ayumi Ohkuma

Hiroshi Kikuchi

Hiroshi Abe

Tomohiro Nakagawa

Mitsuo Usami

Koichi Matsumoto

Takeshi Yamazaki

Shinji Hayashi

Kanji Otsuka

Kouichi Matsumoto

Tetsuya Hayashida

Takashi Mori

Shunichi Sugiyama

Yasunori Yoshie

Tadashi Fukushima

Akio Nagamune

Takayuki Okinaga

Shunsuke Minami

Ichiro Harashima

Mitsuaki Uesugi

Taiki Sugawara

Shigeo Kuroda

Masayuki Nakada

Yasumasa Kawashima

Tomio Yamamoto

Tsutomu Fukushima

Shota Nakamura

Norihiro Nakajima

Yoshiro Yamada

Masao Kato

Kunizo Sahara

Ichiro Niitsu

Yuuji Shirai

Seiji Miyamoto

Takashi Kumagai

Kouichi Tezuka

Yoshiaki Shinotsuka

Koji Sakasegawa

Hiroshi Tachi

Toshiyuki Kasahara

Masahisa Tate

Kazuya Kojima

Shogo Atsumi

Motomi Odamura

Yoshio Miyashita

Toshihiko Satoh

Yukio Hosaka

Katsuhiko Murakami

Takamitsu Takayama

Takeshi Furukawa

Kouichi Sato

Kiyotaka Imai

Hironobu Yoshikawa

Kazuo Kawamura

Takahiro Yamakura

Kazutoshi Kubo

A system, a method, and a computer program product for selective pairing of wireless devices are provided. A pairing device scans for an advertising packet. The pairing device checks each scanned advertising packet for a shared key. The pairing device responds to the scanned advertising packet only when the advertising packet contains the shared key.

Selective pairing of wireless devices using shared keys

A stereo camera provided in an earth-moving machine includes a first image pick-up portion and a second image pick-up portion. An optical axis of the first image pick-up portion and an optical axis of the second image pick-up portion are inclined away from a work implement at angles different from each other with respect to a central axis of the work implement in a plan view as a distance from a main body is greater.

Image pick-up apparatus, earth-moving machine and image pick-up system

A system, a method, and a computer program product for processing data using defined data definitions in communications systems. A communication link is established between a first device and a second device. At least one or more data packets are exchanged between the first device and the second device. The first device uses at least one first data definition to extract data from one or more payloads of the one or more data packets when the data packets are received from the second device. The second device uses at least one second data definition to extract data from one or more payloads of the one or more data packets when the data packets are received from the first device.

Data processing using defined data definitions

A plurality of electromagnetic proportional control valves are configured to control a pressure of a pilot oil generated by operation of a first control lever device and a second control lever device and, in accordance with the pressure of the pilot oil, adjust a flow rate of a hydraulic oil supplied to hydraulic cylinders. The plurality of electromagnetic proportional control valves are divided into a first valve block including at least one of the electromagnetic proportional control valves and a second valve block including at least one of the electromagnetic proportional control valves. The first valve block and the second valve block are arranged to be separated from each other.

Work machine

A work machine according an aspect includes a work implement, an operation apparatus for operating the work implement, and a controller for controlling the work implement. The controller performs intervention control for lowering the work implement based on an operation command from the operation apparatus, and reduces a speed of the work implement during the intervention control to stop the work implement before completion of the intervention control.

Work machine and control method for work machine

A hydraulic excavator includes: a vehicular body; a cab placed on the vehicular body; and a plurality of antennas for receiving satellite positioning signals, the plurality of antennas including a main antenna and a sub-antenna. The main antenna is attached to the cab. The sub-antenna is attached to the vehicular body without the cab being interposed.

Earth-moving machine

A work machine according to an aspect includes: a dipper stick; a boom; a cylinder for driving the boom; an operation apparatus for operating the dipper stick; and a controller for performing intervention control by using the boom in accordance with an operation command issued from the operation apparatus to achieve land grading. The controller determines whether or not the operation command from the operation apparatus indicates an amount greater than or equal to a predetermined amount, and corrects a speed of the cylinder when the operation command from the operation apparatus indicates an amount greater than or equal to the predetermined amount.

A measuring jig is attached to an antenna support member of a revolving unit, and used to measure a slewing position of the revolving unit together with an external measurement apparatus. The measuring jig includes a prism mirror and an attachment member. The prism mirror reflects projection light from the external measurement apparatus. The attachment member attaches the prism mirror to the antenna support member. The attachment member is configured to be attached to the antenna support member by sandwiching an attached portion.

Measuring jig and hydraulic excavator calibration method

A boom is attached to a body. A boom pin supports the boom while being swingable with respect to the body. A through-hole is made in the body. The through-hole is made such that a member (for example, the boom pin or a boom angle detector) that recognizes a position of the boom pin can be observed through the through-hole from a side of a hydraulic excavator.

Hydraulic excavator and hydraulic excavator calibration method

A work vehicle includes an arm. An arm cylinder drives the arm. A direction control valve operates the arm cylinder by allowing supply of a hydraulic oil to the arm cylinder as a spool moves. An oil path is connected to the direction control valve. A pilot oil for moving the spool flows through the oil path. A proportional solenoid valve for arm excavation is provided in the oil path. An arm control member is provided for an operator to operate drive of the arm. An amount of operation of the arm control member is equal to or smaller than a prescribed value in a first operation state and greater than the prescribed value in a second operation state. A command current instructing an opening of the proportional solenoid valve for arm excavation is set to a constant value in the first operation state.

Work vehicle

A work vehicle includes a boom, an arm, a bucket, an arm control member, a speed limit determination portion, and a target speed determination portion. The speed limit determination portion determines a speed limit for limiting a speed of a cutting edge of the bucket in accordance with a distance between a cutting edge and a design surface. The target speed determination portion determines a target speed of the boom based on the speed limit. The speed limit determination portion decides on a speed limit calculated based on correlation between the speed limit and the distance between the design surface and the cutting edge when an amount of operation of the arm control member is equal to or greater than a prescribed amount and decides on a speed limit lower than the speed limit calculated based on the correlation when the amount of operation is smaller than the prescribed amount.

A hydraulic excavator is provided with an arm cylinder, an arm switching valve, a sixth pilot pressure control valve, a sixth electromagnetic proportional valve, a sixth upstream pilot flow path, a sixth hydraulic pressure sensor, and a control section. The control section selects at least one item of current value information from a plurality of items of current value information on the basis of a hydraulic pressure that is detected by the sixth hydraulic pressure sensor. The control section is configured to set a current value of a current that is output to the sixth electromagnetic proportional valve on the basis of the current value information that is selected.

Work vehicle and work vehicle control method

A work vehicle includes a speed limit calculation portion, a speed determination portion, an adjustment portion, and a boom speed determination portion. The speed limit calculation portion calculates a speed limit for limiting a speed of a cutting edge of a bucket. The speed determination portion determines whether or not a speed of raising the boom has been lowered when an amount of operation of an arm is smaller than a prescribed amount. The adjustment portion delays speed change to the speed limit. The boom speed determination portion determines a target speed of the boom based on the speed limit after delay by the adjustment portion when it is determined that the speed of raising the boom has been lowered, and determines a target speed of the boom based on the speed limit calculated when it is not determined that the speed of raising the boom has been lowered.

Growing community of inventors

Tokyo, Japan

Takeo Yamada