Patents by Inventor Kazuhiro Hatake
Kazuhiro Hatake 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).
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Publication number: 20200199853Abstract: A loaded machine information acquisition unit acquires position information and azimuth direction information of a transport vehicle. An earth removal position-specifying unit specifies an earth removal position for loading a load target onto the transport vehicle, based on the position information and the azimuth direction information. A bucket position-specifying unit specifies a position of a bucket. An operation signal generation unit generates an operation signal for moving the bucket from the specified position to the earth removal position.Type: ApplicationFiled: October 2, 2018Publication date: June 25, 2020Inventors: Tomoki KONDA, Yusuke SAIGO, Kazuhiro HATAKE
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Publication number: 20200063397Abstract: A display system includes: an image data acquisition unit that acquires a front image and a side image captured by an imaging device mounted on a work machine having a swing body swinging about a swing axis and working equipment supported by the swing body, the front image including at least an image in a front direction with respect to the swing axis, the side image including at least an image in a lateral direction to the swing axis, the lateral direction being orthogonal to the front direction; and a display control unit that displays the front image and the side image acquired by the image data acquisition unit on a display device existing outside the work machine.Type: ApplicationFiled: February 23, 2018Publication date: February 27, 2020Inventors: Kazuhiro Hatake, Yukinori Matsumura
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Patent number: 9145127Abstract: A traction control device of a six-wheel drive construction machine, the drive construction machine including: right and left front wheels connected to each other via an axle, right and left center wheels connected to each other via an axle, and right and left rear wheels connected to each other via an axle, the right and left front, center and rear wheels being driven as driving wheels; a braking mechanism provided to each of the wheels; and a differential adjusting mechanism for adjusting a differential between the front and rear driving wheels, the traction control device controls the braking mechanisms only for the driving wheels related to any two of axles while controlling the differential adjusting mechanism.Type: GrantFiled: June 29, 2011Date of Patent: September 29, 2015Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
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Patent number: 8989969Abstract: An object of the invention is to provide a traction control apparatus capable of suitably controlling an error, if it occurs, between an estimation of a vehicle speed and an actual vehicle speed. A traction control apparatus according to the invention includes a vehicle speed estimator and a driving-force controller. The traction control apparatus includes a vehicle state determiner that determines whether the vehicle speed of the construction vehicle estimated by the vehicle speed estimator and the driving-force control by the driving-force controller are balanced, and a driving-force control changer that changes a driving-force control by the driving-force controller when the vehicle state determiner determines the vehicle speed and the driving-force control to be unbalanced.Type: GrantFiled: March 12, 2013Date of Patent: March 24, 2015Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake
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Patent number: 8725359Abstract: A traction control device includes: rotation speed detectors provided to wheels; a control-start determiner that determines whether or not to control a braking mechanism and a differential adjusting mechanism based on rotation speeds; a braking mechanism controller that controls the braking mechanism based on a result of the determination of the control-start determiner; and a differential adjusting mechanism controller that controls the differential adjusting mechanism based on the result of the determination of the control-start determiner, in which the control-start determiner includes: a right-left-wheel rotation speed difference calculating section; a front-rear-wheel rotation speed difference calculating section; and a control-start determining section that determines whether or not to start controlling at least one of the braking mechanism and the differential adjusting mechanism when one of rotation speed differences reaches or exceeds a predetermined threshold.Type: GrantFiled: December 25, 2009Date of Patent: May 13, 2014Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
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Patent number: 8725360Abstract: The invention provides a traction control device capable of ensuring a sufficient acceleration and course traceability during the turning of a vehicle irrespective of the type of driving system or a road surface condition. A traction control device of the invention includes: a control-start determiner that determines whether or not to control a braking mechanism; and a traction force estimating section that estimates a traction force between each of wheels and the road surface. The traction force estimating section includes: a control condition determining section that determines a control condition of the braking mechanism based on a result of the determination of the control-start determiner; a traction force initial value setting section that sets an initial value in accordance with a result of the determination of the control condition determining section; and a traction force modifying section that modifies the traction force based on a control deviation.Type: GrantFiled: December 25, 2009Date of Patent: May 13, 2014Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
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Patent number: 8694212Abstract: A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.Type: GrantFiled: January 14, 2013Date of Patent: April 8, 2014Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Azumi Nomura
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Patent number: 8682535Abstract: A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.Type: GrantFiled: January 14, 2013Date of Patent: March 25, 2014Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Azumi Nomura
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Patent number: 8538635Abstract: A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.Type: GrantFiled: December 25, 2009Date of Patent: September 17, 2013Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Azumi Nomura
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Patent number: 8504254Abstract: An object of the invention is to provide a traction control apparatus capable of suitably controlling an error, if it occurs, between an estimation of a vehicle speed and an actual vehicle speed. A traction control apparatus according to the invention includes a vehicle speed estimator and a driving-force controller. The traction control apparatus includes a vehicle state determiner that determines whether the vehicle speed of the construction vehicle estimated by the vehicle speed estimator and the driving-force control by the driving-force controller are balanced, and a driving-force control changer that changes a driving-force control by the driving-force controller when the vehicle state determiner determines the vehicle speed and the driving-force control to be unbalanced.Type: GrantFiled: December 25, 2009Date of Patent: August 6, 2013Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake
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Publication number: 20130190992Abstract: An object of the invention is to provide a traction control apparatus capable of suitably controlling an error, if it occurs, between an estimation of a vehicle speed and an actual vehicle speed. A traction control apparatus according to the invention includes a vehicle speed estimator and a driving-force controller. The traction control apparatus includes a vehicle state determiner that determines whether the vehicle speed of the construction vehicle estimated by the vehicle speed estimator and the driving-force control by the driving-force controller are balanced, and a driving-force control changer that changes a driving-force control by the driving-force controller when the vehicle state determiner determines the vehicle speed and the driving-force control to be unbalanced.Type: ApplicationFiled: March 12, 2013Publication date: July 25, 2013Applicant: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake
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Publication number: 20130190993Abstract: An object of the invention is to provide a traction control apparatus capable of suitably controlling an error, if it occurs, between an estimation of a vehicle speed and an actual vehicle speed. A traction control apparatus according to the invention includes a vehicle speed estimator and a driving-force controller. The traction control apparatus includes a vehicle state determiner that determines whether the vehicle speed of the construction vehicle estimated by the vehicle speed estimator and the driving-force control by the driving-force controller are balanced, and a driving-force control changer that changes a driving-force control by the driving-force controller when the vehicle state determiner determines the vehicle speed and the driving-force control to be unbalanced.Type: ApplicationFiled: March 12, 2013Publication date: July 25, 2013Applicant: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake
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Patent number: 8463511Abstract: An object of the invention is to provide a traction control device capable of preventing a reduction in acceleration. A traction control device of the invention includes a braking mechanism controller that controls a braking mechanism.Type: GrantFiled: December 25, 2009Date of Patent: June 11, 2013Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
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Publication number: 20130131935Abstract: A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.Type: ApplicationFiled: January 14, 2013Publication date: May 23, 2013Inventors: Koji Uematsu, Kazuhiro Hatake, Azumi Nomura
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Publication number: 20130131934Abstract: A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.Type: ApplicationFiled: January 14, 2013Publication date: May 23, 2013Inventors: Koji Uematsu, Kazuhiro Hatake, Azumi Nomura
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Patent number: 8352145Abstract: A traction control device includes: rotation speed detectors provided to wheels; a control-start determiner that determines whether or not to control a braking mechanism and a differential adjusting mechanism based on rotation speeds; a braking mechanism controller that controls the braking mechanism based on a result of the determination of the control-start determiner; and a differential adjusting mechanism controller that controls the differential adjusting mechanism based on the result of the determination of the control-start determiner, in which the control-start determiner includes: a right-left-wheel rotation speed difference calculating section; a front-rear-wheel rotation speed difference calculating section; and a control-start determining section that determines whether or not to start controlling at least one of the braking mechanism and the differential adjusting mechanism when one of rotation speed differences reaches or exceeds a predetermined threshold.Type: GrantFiled: July 1, 2011Date of Patent: January 8, 2013Assignee: Komatsu Ltd.Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
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Publication number: 20120041651Abstract: The invention provides a traction control device capable of ensuring a sufficient acceleration and course traceability during the turning of a vehicle irrespective of the type of driving system or a road surface condition. A traction control device of the invention includes: a control-start determiner that determines whether or not to control a braking mechanism; and a traction force estimating section that estimates a traction force between each of wheels and the road surface. The traction force estimating section includes: a control condition determining section that determines a control condition of the braking mechanism based on a result of the determination of the control-start determiner; a traction force initial value setting section that sets an initial value in accordance with a result of the determination of the control condition determining section; and a traction force modifying section that modifies the traction force based on a control deviation.Type: ApplicationFiled: December 25, 2009Publication date: February 16, 2012Applicant: KOMATSU LTD.Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto
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Publication number: 20110270497Abstract: An object of the invention is to provide a traction control apparatus capable of suitably controlling an error, if it occurs, between an estimation of a vehicle speed and an actual vehicle speed. A traction control apparatus according to the invention includes a vehicle speed estimator and a driving-force controller. The traction control apparatus includes a vehicle state determiner that determines whether the vehicle speed of the construction vehicle estimated by the vehicle speed estimator and the driving-force control by the driving-force controller are balanced, and a driving-force control changer that changes a driving-force control by the driving-force controller when the vehicle state determiner determines the vehicle speed and the driving-force control to be unbalanced.Type: ApplicationFiled: December 25, 2009Publication date: November 3, 2011Applicant: KOMATSU LTD.Inventors: Koji Uematsu, Kazuhiro Hatake
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Publication number: 20110257847Abstract: A vehicle speed estimator includes a unit that selects a minimum rotation speed among rotation speeds of wheels detected by a rotation speed detector and calculates a reference wheel speed of a construction vehicle at every predetermined time. The unit includes: a variable filter processor that performs a low-pass filter processing to the minimum rotation speed, the variable filter processor having a variable time constant; and a time constant changer that changes the time constant of the variable filter processor in accordance with travel conditions of the construction vehicle.Type: ApplicationFiled: December 25, 2009Publication date: October 20, 2011Applicant: KOMATSU LTD.Inventors: Koji Uematsu, Kazuhiro Hatake, Azumi Nomura
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Publication number: 20110257851Abstract: A traction control device of a six-wheel drive construction machine, the drive construction machine including: right and left front wheels connected to each other via an axle, right and left center wheels connected to each other via an axle, and right and left rear wheels connected to each other via an axle, the right and left front, center and rear wheels being driven as driving wheels; a braking mechanism provided to each of the wheels; and a differential adjusting mechanism for adjusting a differential between the front and rear driving wheels, the traction control device controls the braking mechanisms only for the driving wheels related to any two of axles while controlling the differential adjusting mechanism.Type: ApplicationFiled: June 29, 2011Publication date: October 20, 2011Applicant: KOMATSU LTD.Inventors: Koji Uematsu, Kazuhiro Hatake, Yuya Kusumoto