Patents by Inventor Jun Tsunekawa

Jun Tsunekawa 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).

  • Patent number: 9296372
    Abstract: A control apparatus includes a first control part and a second control part. The first control part controls a control target based on a control amount that is output from the second control part and a command amount that is manually input, and permits the control amount to exceed a predetermined amount based on a standard when respective control directions of the control amount and the command amount are coincident with one another.
    Type: Grant
    Filed: April 25, 2014
    Date of Patent: March 29, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Patent number: 9283910
    Abstract: Provided is an object detection apparatus and an object detecting method for, with respect to an object detected by a radar, determining whether the object is an automobile and performing an appropriate collision determination based on a determination result. The apparatus comprises a radar device 1 which detects a target in a surrounding area of an own vehicle VM; a target processing section 21 which calculates, with respect to the detected target, information containing at least two of information indicating a position of presence, information indicating a moving direction, and information indicating a moving speed, of the target as target information; and a target determination section 23 which determines, based on the calculated target information, whether a target object is a bicycle depending on whether the target satisfies a predetermined condition, and which determines a risk of collision between the vehicle VM and the target object.
    Type: Grant
    Filed: December 9, 2008
    Date of Patent: March 15, 2016
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Patent number: 8989913
    Abstract: Provided is a travel route estimation device capable of accurately estimating, without excessively increasing communication load of the device, a shape of a travel route even when one's own-vehicle is traveling on a travel route that does not have any objects installed on the route. A calculation section calculates and successively stores a radius of curvature of the travel route based on a yaw rate detected by a yaw rate detection section and on a traveling velocity detected by a velocity detection section. When conducting a filtering process for reducing variation of the calculate radius of curvature, the calculation section selects a filtering constant for multiplying the stored radius of curvature in accordance with the type of the travel route of the own-vehicle, and generates information representing a radius of curvature obtained by conducting at least one filtering process by using the selected filtering constant.
    Type: Grant
    Filed: December 26, 2008
    Date of Patent: March 24, 2015
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Publication number: 20140350822
    Abstract: A control apparatus includes a first control part and a second control part. The first control part controls a control target based on a control amount that is output from the second control part and a command amount that is manually input, and permits the control amount to exceed a predetermined amount based on a standard when respective control directions of the control amount and the command amount are coincident with one another.
    Type: Application
    Filed: April 25, 2014
    Publication date: November 27, 2014
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun TSUNEKAWA
  • Patent number: 8847792
    Abstract: Provided is an object detection apparatus capable of accurately estimating the movement amount of the position, which moves within an oncoming vehicle, of a reflection point of an electromagnetic wave radiated from a radar apparatus, and using the movement amount for collision possibility determination. The object detection apparatus provided in a vehicle includes: a relative position detection section radiating the electromagnetic wave to an object in front of the vehicle, and receiving a reflection wave from the object, thereby detecting the relative position, to the vehicle, of an electromagnetic wave reflection point on the object reflecting the electromagnetic wave; and a movement amount estimation section capable of, based on the relative position to the vehicle of the electromagnetic wave reflection point, estimating, as continuous values, a movement amount of the electromagnetic wave reflection point on the object from a predetermined timing until the object approaches the vicinity of the vehicle.
    Type: Grant
    Filed: September 24, 2010
    Date of Patent: September 30, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Patent number: 8581776
    Abstract: Provided is a radar system which calculates a track of a detected object and can determine whether or not the track is accurate. The radar system includes: a radar section for emitting an electromagnetic wave to an object and receiving a reflected wave reflected from the object to detect position information of the object; a track calculation section for calculating, periodically at a first cycle, a track along which the object moves, on the basis of the position information obtained from the radar section; a first speed calculation section for calculating a first speed at which the object moves, on the basis of pieces of the position information at two different time points having a time interval which is longer than the first cycle; and a track determination section for determining whether or not the track is accurate, on the basis of at least the first speed.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: November 12, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Patent number: 8494722
    Abstract: A vehicle occupant protection apparatus includes a first collision detection mechanism provided for a vehicle and that detects a collision of the vehicle; a second collision detection mechanism provided closer to a middle of the vehicle than the first collision detection mechanism and that detects a collision of the vehicle; a first protection mechanism that protects an occupant from a collision of the vehicle; a controller that activates the first protection mechanism at the time when the first and second collision detection mechanisms detect a collision of the vehicle; and a collision prediction mechanism that predicts a collision of the vehicle. Every time the collision prediction mechanism predicts a collision of the vehicle in a direction from the first collision detection mechanism toward the middle of the vehicle, the controller activates the first protection mechanism at the time when the first collision detection mechanism detects the collision of the vehicle.
    Type: Grant
    Filed: December 30, 2008
    Date of Patent: July 23, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Jun Tsunekawa, Motomi Iyoda
  • Patent number: 8483944
    Abstract: A collision determination ECU includes: a possibility determination section for determining whether or not there is a possibility of a collision with a forward vehicle; a traveling direction determination section for determining whether or not changing of a traveling direction of at least one of an own-vehicle and the forward vehicle is in progress; and a condition changing section for changing a collision determination condition, which is a condition for a possibility estimation section to determine that there is a possibility of a collision, so as to be strict, when the traveling direction determination section determines that changing of a traveling direction is in progress. As a result, unnecessary operations of a passenger protection device and the like can be suppressed.
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: July 9, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Publication number: 20130169449
    Abstract: Provided is an object detection apparatus capable of accurately estimating the movement amount of the position, which moves within an oncoming vehicle, of a reflection point of an electromagnetic wave radiated from a radar apparatus, and using the movement amount for collision possibility determination. The object detection apparatus provided in a vehicle includes: a relative position detection section radiating the electromagnetic wave to an object in front of the vehicle, and receiving a reflection wave from the object, thereby detecting the relative position, to the vehicle, of an electromagnetic wave reflection point on the object reflecting the electromagnetic wave; and a movement amount estimation section capable of, based on the relative position to the vehicle of the electromagnetic wave reflection point, estimating, as continuous values, a movement amount of the electromagnetic wave reflection point on the object from a predetermined timing until the object approaches the vicinity of the vehicle.
    Type: Application
    Filed: September 24, 2010
    Publication date: July 4, 2013
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Patent number: 8386160
    Abstract: A body detection apparatus includes: movement direction calculation portion that calculates a movement direction of each of acquisition points by using signals that show the acquisition points and that are obtained through detection of a body present around the vehicle; and determination portion that pre-sets a frame commensurate with a shape of a body as a detection object, and for pre-setting for the frame a reference traveling direction as an assumed traveling direction of the body, and for determining, among the acquisition points, acquisition points present within the frame whose reference traveling direction is aligned with the movement direction as being acquisition points of a single body.
    Type: Grant
    Filed: November 5, 2009
    Date of Patent: February 26, 2013
    Assignees: Toyota Jidosha Kabushiki Kaisha, Fujitsu Ten Limited
    Inventors: Jun Tsunekawa, Masayuki Kishida
  • Patent number: 8248295
    Abstract: A pre-crash safety system, which is not influenced by a false recognition that another vehicle is approaching and which causes the vehicle to conduct a safety measure operation when the possibility of a collision exists, is disclosed. The pre-crash safety system includes a collision prediction unit that makes the prediction of a collision between the vehicle and the another vehicle that has entered a monitoring area of the radar device; and a control unit that causes the own-vehicle to conduct the safety measure operation based on a result of the prediction of a collision by the collision prediction unit. The vehicle does not conduct the safety measure operation if, after the another vehicle has entered the monitoring area, a reflection point coordinate which represents a reflection point of a radar wave on the another vehicle is positioned within a predefined direction range when viewed from the vehicle.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: August 21, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Publication number: 20120116663
    Abstract: Objects relatively approaching a vehicle diagonally are detected, and at least relative distances of the detected objects with respect to the vehicle and relative speeds of the detected objects with respect to the vehicle are calculated. Using the relative distances of the objects and the relative speeds of the objects, estimated collision time lengths to collisions of the objects with the vehicle are calculated respectively. A predetermined number of the objects that are arranged in an ascending order of the estimated collision time lengths are selected, and pieces of detected information on the selected objects are output.
    Type: Application
    Filed: April 15, 2009
    Publication date: May 10, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Patent number: 8154437
    Abstract: There is provided a traveling direction vector reliability determination method in which reliability of a traveling direction vector of another vehicle is calculated so as to increase reliability of a collision prediction. The traveling direction vector reliability determination method determines the reliability of the traveling direction vector when the traveling direction vector is calculated based on position coordinate points of a target, which are calculated by a radar device.
    Type: Grant
    Filed: December 5, 2008
    Date of Patent: April 10, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Patent number: 8102308
    Abstract: The present invention provides a radar apparatus capable of changing a characteristic of filter processing while considering also a relative velocity of an object. A measurement section measures a relative position and a relative velocity of an object such as another vehicle, a pedestrian, and an object placed on a road. The radar apparatus calculates a time until the object and an own vehicle collide with each other, based on the relative position and relative velocity of the object measured by the measurement section, and changes, based on the calculated time, a filter coefficient to be used when filter processing is performed on a measured position converted from the measured relative position of the object, thereby changing a characteristic of the filter processing to be performed on the measured position, between stability and responsiveness.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: January 24, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventor: Jun Tsunekawa
  • Publication number: 20110285574
    Abstract: Provided is a radar system which calculates a track of a detected object and can determine whether or not the track is accurate. The radar system includes: a radar section for emitting an electromagnetic wave to an object and receiving a reflected wave reflected from the object to detect position information of the object; a track calculation section for calculating, periodically at a first cycle, a track along which the object moves, on the basis of the position information obtained from the radar section; a first speed calculation section for calculating a first speed at which the object moves, on the basis of pieces of the position information at two different time points having a time interval which is longer than the first cycle; and a track determination section for determining whether or not the track is accurate, on the basis of at least the first speed.
    Type: Application
    Filed: December 18, 2008
    Publication date: November 24, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Patent number: 8054216
    Abstract: A radar device has a plurality of receiving antennas which receive, as a reception wave, a radar wave sent in a predetermined reference direction and reflected by a target; a phase difference detection unit which detects a first phase difference of the reception wave received by a first receiving antenna pair that is spaced by a first gap, and a second phase difference of the reception wave received by a second receiving antenna pair that is spaced by a second gap smaller than the first gap; and an angle detection unit which performs a first process of determining, as a detection angle, an angle of the target relative to the reference direction being a mutually coincident angle from among a plurality of first angles corresponding to the first phase difference and a plurality of second angles corresponding to the second phase difference. The radar device allows expanding an angle detection range without reducing the resolution of the angle corresponding to the second phase difference.
    Type: Grant
    Filed: January 26, 2009
    Date of Patent: November 8, 2011
    Assignees: Fujitsu Ten Limited, Toyota Jidosha Kabushiki Kaisha
    Inventors: Motohide Kinoshita, Hisateru Asanuma, Jun Tsunekawa, Motomi Iyoda, Tomoya Kawasaki
  • Publication number: 20110264302
    Abstract: Provided is a travel route estimation device capable of accurately estimating, without excessively increasing communication load of the device, a shape of a travel route even when one's own-vehicle is traveling on a travel route that does not have any objects installed on the route. A calculation section calculates and successively stores a radius of curvature of the travel route based on a yaw rate detected by a yaw rate detection section and on a traveling velocity detected by a velocity detection section. When conducting a filtering process for reducing variation of the calculate radius of curvature, the calculation section selects a filtering constant for multiplying the stored radius of curvature in accordance with the type of the travel route of the own-vehicle, and generates information representing a radius of curvature obtained by conducting at least one filtering process by using the selected filtering constant.
    Type: Application
    Filed: December 26, 2008
    Publication date: October 27, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Publication number: 20110246071
    Abstract: A collision determination ECU (1) includes: a possibility determination section (16) for determining whether or not there is a possibility of a collision with a forward vehicle (VC2); a traveling direction determination section (14) for determining whether or not changing of a traveling direction of at least one of an own-vehicle (VC1) and the forward vehicle (VC2) is in progress; and a condition changing section (15) for changing a collision determination condition, which is a condition for a possibility estimation section (16) to determine that there is a possibility of a collision, so as to be strict, when the traveling direction determination section (14) determines that changing of a traveling direction is in progress. As a result, unnecessary operations of a passenger protection device and the like can be suppressed.
    Type: Application
    Filed: December 24, 2008
    Publication date: October 6, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Publication number: 20110238309
    Abstract: Provided is an object detection apparatus and an object detecting method for, with respect to an object detected by a radar, determining whether the object is an automobile and performing an appropriate collision determination based on a determination result. The apparatus comprises a radar device 1 which detects a target in a surrounding area of an own vehicle VM; a target processing section 21 which calculates, with respect to the detected target, information containing at least two of information indicating a position of presence, information indicating a moving direction, and information indicating a moving speed, of the target as target information; and a target determination section 23 which determines, based on the calculated target information, whether a target object is a bicycle depending on whether the target satisfies a predetermined condition, and which determines a risk of collision between the vehicle VM and the target object.
    Type: Application
    Filed: December 9, 2008
    Publication date: September 29, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa
  • Publication number: 20110187582
    Abstract: There is provided a traveling direction vector reliability determination method in which reliability of a traveling direction vector of another vehicle is calculated so as to increase reliability of a collision prediction. The traveling direction vector reliability determination method determines the reliability of the traveling direction vector when the traveling direction vector is calculated based on position coordinate points of a target, which are calculated by a radar device.
    Type: Application
    Filed: December 5, 2008
    Publication date: August 4, 2011
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventor: Jun Tsunekawa