Patents by Inventor Akiharu Nishijima

Akiharu Nishijima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20170151946
    Abstract: A control system of a mining machine controls a driving device that drives a traveling device of the mining machine. The control system includes an acceleration command value calculation unit that calculates an acceleration command value for accelerating the mining machine, a correction value calculation unit that calculates a correction value for the acceleration command value based on a first driving force component of the driving device to cause the mining machine to travel at a target traveling speed and a second driving force component of the driving device to offset a resistance component against traveling of the mining machine, an addition processing unit that calculates a correction acceleration command value by adding the acceleration command value and the correction value, and an acceleration command value output unit that outputs the correction acceleration command value to the driving device.
    Type: Application
    Filed: November 27, 2015
    Publication date: June 1, 2017
    Inventors: Tatsuya Shiga, Ryuuen Kou, Akiharu Nishijima
  • Publication number: 20170122741
    Abstract: A construction machine control system for a construction machine that travels along a travel route, includes: a position detection unit that detects a position of the construction machine; a determination unit that determines whether an error in the position detected by the position detection unit is equal to or smaller than a predetermined error; a non-contact sensor that detects a position of an object around the construction machine; and a map information storage unit that extracts a detection result related to a vertical projection that protrudes vertically from a detection result of the non-contact sensor and stores the extracted detection result related to the vertical projection as map information when the determination unit determines that the error in the position detected by the position detection unit is equal to or smaller than the predetermined error.
    Type: Application
    Filed: October 30, 2015
    Publication date: May 4, 2017
    Inventors: Atsushi Sakai, Mitsuhiro Ryuman, Masanori Tojima, Akiharu Nishijima
  • Publication number: 20170124862
    Abstract: A construction machine control system (30) includes: a GPS receiver (31) that detects a GPS position of a dump truck; a laser sensor (24B) that detects a position of an object around the dump truck; and a position measurement controller (33) that detects a position of a vertical projection that protrudes vertically from the surface of the travel route from the detection result of the GPS receiver (31) and the detection result of the laser sensor (24B) when the dump truck travels along the travel route and stores the detected position of the vertical projection in a map storage database (36) as map information of the travel route.
    Type: Application
    Filed: October 30, 2015
    Publication date: May 4, 2017
    Inventors: Atsushi Sakai, Mitsuhiro Ryuman, Masanori Tojima, Akiharu Nishijima
  • Patent number: 8437900
    Abstract: A control device for guided travel of an unmanned vehicle, in which the unmanned vehicle is guided to travel by receiving a signal sent from a GPS satellite by the unmanned vehicle, measuring its own vehicle position based on the signal, and controlling such that a positional shift between the vehicle position and a target point that is a passing point sequentially set on a target traveling course falls into an allowable range for controlling error, wherein a guidable range is set in advance such that a position measurement error is added to the allowable range for controlling error; the position measurement error is obtained based on position measurement accuracy information from the signal; the allowable range for controlling error is changed according to the obtained position measurement error; and control is performed such that the positional shift falls into the changed allowable range for controlling error.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: May 7, 2013
    Assignee: Komatsu Ltd.
    Inventors: Akiharu Nishijima, Masaki Mori
  • Patent number: 8280573
    Abstract: Guiding speed is increased while an unmanned vehicle is prevented from straying from a travel passage width, to improve the work efficiency. Target speed of the unmanned vehicle increases as a distance between a current position of the unmanned vehicle and a guidable borderline increases, and the target speed of the unmanned vehicle decreases as the distance between the current position of the unmanned vehicle and a guidable borderline decreases. The unmanned vehicle travels, along a travel path having adjacent inbound/outbound lanes, in a direction opposite to a direction of a vehicle on an oncoming lane. If it is determined that the vehicle traveling along the oncoming lane is approaching the unmanned vehicle, then the target speed of the unmanned vehicle is reduced, whereby the unmanned vehicle is caused to travel at a low guiding speed.
    Type: Grant
    Filed: August 6, 2007
    Date of Patent: October 2, 2012
    Assignee: Komatsu Ltd.
    Inventors: Tsugio Sudou, Akiharu Nishijima
  • Patent number: 7966106
    Abstract: Leveling operation can be effectively performed at a discharge site without increasing a cost of vehicles, and a running course can be easily generated in a short time and at a low-cost. Based on each of measured position data of a survey line 20 of a discharge site 21, a normal line Lc normal to the survey line 20 is obtained, a target discharge position 26? is positioned at a prescribed distance away from the survey line 20 in an inward direction of the discharge site 21 based on the normal line Lc, and then data of a running course 27 in which a reference approach direction 31 to approach the target discharge position 26? is a direction normal to the survey line 20 are generated.
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: June 21, 2011
    Assignee: Komatsu Ltd.
    Inventors: Tsugio Sudou, Masanori Tojima, Koji Takeda, Akiharu Nishijima, Masaki Mori, Tomonori Ozaki, Kazunori Kuromoto
  • Publication number: 20100292883
    Abstract: A control device for guided travel of an unmanned vehicle, in which the unmanned vehicle is guided to travel by receiving a signal sent from a GPS satellite by the unmanned vehicle, measuring its own vehicle position based on the signal, and controlling such that a positional shift between the vehicle position and a target point that is a passing point sequentially set on a target traveling course falls into an allowable range for controlling error, wherein a guidable range is set in advance such that a position measurement error is added to the allowable range for controlling error; the position measurement error is obtained based on position measurement accuracy information from the signal; the allowable range for controlling error is changed according to the obtained position measurement error; and control is performed such that the positional shift falls into the changed allowable range for controlling error.
    Type: Application
    Filed: January 29, 2008
    Publication date: November 18, 2010
    Applicant: Komatsu Ltd.
    Inventors: Akiharu Nishijima, Masaki Mori
  • Patent number: 7742853
    Abstract: A restricted area (60) is created based on positional information of a manned vehicle (20) traveling one of outward/return lanes (51, 52), and a detour course (72) is created based on information of the restricted area (60). Information on the detour course (72) is provided to the unmanned vehicles (10, 11) and the manned vehicle (20). Based on the positional information of the unmanned vehicles (10, 11) which proceed towards each other from the opposite directions with the restricted area (60) therebetween, the unmanned vehicle (11) on the lane (52) which is the opposite side of the restricted area (60) is blocked at a block position (61B) and at the same time a travel permission command for permitting traveling the detour course (72) is issued to the unmanned vehicle (10) traveling the lane (51) on the restricted area side so that the unmanned vehicle (10) travels the detour course (72).
    Type: Grant
    Filed: December 8, 2006
    Date of Patent: June 22, 2010
    Assignee: Komatsu Ltd.
    Inventors: Masaki Mori, Tsugio Sudou, Akiharu Nishijima, Masanori Tojima, Kazunori Kuromoto, Koji Takeda, Tomonori Ozaki
  • Publication number: 20090299562
    Abstract: Guiding speed is increased while an unmanned vehicle is prevented from straying from a travel passage width, to improve the work efficiency. Target speed of the unmanned vehicle increases as a distance between a current position of the unmanned vehicle and a guidable borderline increases, and the target speed of the unmanned vehicle decreases as the distance between the current position of the unmanned vehicle and a guidable borderline decreases. The unmanned vehicle travels, along a travel path having adjacent inbound/outbound lanes, in a direction opposite to a direction of a vehicle on an oncoming lane. If it is determined that the vehicle traveling along the oncoming lane is approaching the unmanned vehicle, then the target speed of the unmanned vehicle is reduced, whereby the unmanned vehicle is caused to travel at a low guiding speed.
    Type: Application
    Filed: August 6, 2007
    Publication date: December 3, 2009
    Applicant: Komatsu Ltd.
    Inventors: Tsugio Sudou, Akiharu Nishijima
  • Publication number: 20070293996
    Abstract: A restricted area (60) is created based on positional information of a manned vehicle (20) traveling one of outward/return lanes (51, 52), and a detour course (72) is created based on information of the restricted area (60). Information on the detour course (72) is provided to the unmanned vehicles (10, 11) and the manned vehicle (20). Based on the positional information of the unmanned vehicles (10, 11) which proceed towards each other from the opposite directions with the restricted area (60) therebetween, the unmanned vehicle (11) on the lane (52) which is the opposite side of the restricted area (60) is blocked at a block position (61B) and at the same time a travel permission command for permitting traveling the detour course (72) is issued to the unmanned vehicle (10) traveling the lane (51) on the restricted area side so that the unmanned vehicle (10) travels the detour course (72).
    Type: Application
    Filed: December 8, 2006
    Publication date: December 20, 2007
    Applicant: KOMATSU LTD.
    Inventors: Masaki Mori, Tsugio Sudou, Akiharu Nishijima, Masanori Tojima, Kazunori Kuromoto, Koji Takeda, Tomonori Ozaki
  • Publication number: 20070150133
    Abstract: Leveling operation can be effectively performed at a discharge site without increasing a cost of vehicles, and a running course can be easily generated in a short time and at a low-cost. Based on each of measured position data of a survey line 20 of a discharge site 21, a normal line Lc normal to the survey line 20 is obtained, a target discharge position 26? is positioned at a prescribed distance away from the survey line 20 in an inward direction of the discharge site 21 based on the normal line Lc, and then data of a running course 27 in which a reference approach direction 31 to approach the target discharge position 26? is a direction normal to the survey line 20 are generated.
    Type: Application
    Filed: December 8, 2006
    Publication date: June 28, 2007
    Applicant: KOMATSU LTD.
    Inventors: Tsugio Sudou, Masanori Tojima, Koji Takeda, Akiharu Nishijima, Masaki Mori, Tomonori Ozaki, Kazunori Kuromoto