Kubota Corporation

Akisato Hori

Akira Chabata

Naohiro Ishikawa

Kenichi Iwami

Atsushi Shinkai

Kazuo Sakaguchi

Kenji Tamatani

Megumi Suzukawa

Izuru Shimamoto

Yasushi Watabe

A positioning detection device includes a first obtaining circuit to obtain a satellite signal, a second obtaining circuit to obtain a detection signal of an inertial device, a third obtaining circuit to obtain a traveling state of the vehicle body including straight-traveling and turning of the vehicle body, a first calculator to calculate first positioning information in a satellite navigation system to which the satellite signal is applied, a second calculator to calculate second positioning information in an inertial navigation system to which the detection signal is applied, a third calculator to calculate third positioning information in a hybrid navigation system to which the first positioning information and the second positioning information are applied, and an output circuit to output the third positioning information upon obtaining the straight-traveling and to output the first positioning information and/or the second positioning information upon obtaining the turning.

Positioning detection device and working machine having positioning detection device

A satellite radio wave sensitivity distribution management system for a work vehicle that travels automatically in a work site by satellite navigation technology includes a satellite positioning module that outputs satellite position data and reception sensitivity based on satellite information from a satellite, a sensitivity reduction event detection section that detects occurrence of a sensitivity reduction event, a sensitivity reduction event information generation section that generates sensitivity reduction event information including an occurrence location of the sensitivity reduction event, an occurrence time of the sensitivity reduction event, and satellite identification data, a sensitivity reduction event information storage section, a reception obstacle determination section that determines a reception obstacle as the cause of the sensitivity reduction event, and a sensitivity reduction management section that manages a sensitivity reduction area and a sensitivity reduction time zone.

Satellite radio wave sensitivity distribution management system and method for work vehicle

A work-vehicle position measurement system includes a reference station and a work vehicle. The reference station is provided at a reference position to measure a measured position of the reference position by receiving a radio wave from a satellite and to transmit reference information including the measured position. The work vehicle includes circuitry configured to obtain a calculated position of the work vehicle based on satellite information from the satellite and the reference information transmitted from the reference station, to control the work vehicle to travel along a predetermined travel route in a work field based on the calculated position of the work vehicle, and to manage map data of the work field to correspond to the reference information of the reference position.

Work-vehicle position measurement system, work vehicle, and work-vehicle position measurement method

A positioning detection device includes a first obtaining circuit to obtain a satellite signal, a second obtaining circuit to obtain a detection signal of an inertial device, a third obtaining circuit to obtain a traveling state of the vehicle body including straight-traveling and turning of the vehicle body, a first calculator to calculate first positioning information in satellite navigation system to which the satellite signal is applied, a second calculator to calculate second positioning information in inertial navigation system to which the detection signal is applied, a third calculator to calculate third positioning information in Kalman filter to which the first positioning information and the second positioning information are applied, and an output circuit to output the third positioning information when the third obtaining circuit obtains the straight-traveling and to output the first positioning information and/or the second positioning information when the third obtaining circuit obtains the turning.

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Osaka, Japan

Akisato Hori