Patents by Inventor Iwao Maeda

Iwao Maeda 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: 8527201
    Abstract: An azimuth detecting device mounted in a mobile object and having: a geomagnetic sensor; GPS signal receiving means; and measuring means for measuring a position of the mobile object by using a GPS signal, the azimuth detecting device being characterized in calculating a gain correction amount by means of a method of least squares, using an output value of the geomagnetic sensor when a level of the GPS signal received by the GPS signal receiving means is lower than a predetermined level, and calculating a declination correction amount and/or an inclination correction amount on the basis of information obtained from the GPS signal and correcting the output value of the geomagnetic sensor, when the level of the GPS signal is at least the predetermined level.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: September 3, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Naoto Shibata
  • Patent number: 8224573
    Abstract: An azimuth detecting device mounted in a mobile object and having: a geomagnetic sensor; GPS signal receiving means; and measuring means for measuring a position of the mobile object by using a GPS signal, the azimuth detecting device being characterized in calculating a gain correction amount by means of a method of least squares, using an output value of the geomagnetic sensor when a level of the GPS signal received by the GPS signal receiving means is lower than a predetermined level, and calculating a declination correction amount and/or an inclination correction amount on the basis of information obtained from the GPS signal and correcting the output value of the geomagnetic sensor, when the level of the GPS signal is at least the predetermined level.
    Type: Grant
    Filed: October 1, 2008
    Date of Patent: July 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Naoto Shibata
  • Patent number: 8200452
    Abstract: To provide an attitude-angle detecting apparatus, which detects an attitude angle of a mobile object during movement with good accuracy by correcting an output value from an acceleration sensor, and to provide a method for the same. It is characterized in that it comprises an acceleration sensor for measuring an acceleration being applied to a mobile object, a yaw-rate sensor for measuring a yaw rate of the mobile object, a speed sensor for measuring a speed of the mobile object, a mobile-component acceleration calculating means for calculating an actual acceleration from the speed, calculating a centrifugal force from the yaw rate and the speed and calculating a mobile-component acceleration, a resultant force of the actual speed and the centrifugal force, and an attitude-angle calculating means for calculating an attitude angle from a gravitational acceleration, which is obtainable by correcting the acceleration with the mobile-component acceleration.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: June 12, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Naoto Shibata
  • Patent number: 8145419
    Abstract: A mobile object position estimation apparatus mounted in a mobile object includes a first estimation mechanism for estimating the mobile object position based on the outputs from an inertial navigation sensor device (acceleration sensor, and yaw rate sensor, or the like) mounted on the mobile object, a storage for storing map information including at least node information, a second estimation mechanism for estimating the mobile object position based on a predicted path of traveling of the mobile object predicted from the node information, and a synthesis mechanism for determining the final estimated mobile object position by synthesizing the mobile object position estimated by the first estimation mechanism and the mobile object position estimated by the second estimation mechanism.
    Type: Grant
    Filed: November 17, 2006
    Date of Patent: March 27, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Hirohisa Onome, Kazunori Kagawa, Yasuhiro Tajima, Iwao Maeda, Kiyomi Nagamiya, Akihiro Ueda
  • Publication number: 20120004843
    Abstract: An azimuth detecting device mounted in a mobile object and having: a geomagnetic sensor; GPS signal receiving means; and measuring means for measuring a position of the mobile object by using a GPS signal, the azimuth detecting device being characterized in calculating a gain correction amount by means of a method of least squares, using an output value of the geomagnetic sensor when a level of the GPS signal received by the GPS signal receiving means is lower than a predetermined level, and calculating a declination correction amount and/or an inclination correction amount on the basis of information obtained from the GPS signal and correcting the output value of the geomagnetic sensor, when the level of the GPS signal is at least the predetermined level.
    Type: Application
    Filed: September 15, 2011
    Publication date: January 5, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro UEDA, Iwao Maeda, Kiyomi Nagamiya, Naoto Shibata
  • Patent number: 7978127
    Abstract: In a mobile-unit positioning device, phases of pseudo noise codes carried on satellite signals from satellites are observed at a mobile unit to measure a position of the mobile unit. A pseudo distance between one of the satellites and the mobile unit is measured for every satellite during a stop of the mobile unit using an observed value of the phase acquired during a stop of the mobile unit. An error index value indicating an error of the measured distance is computed based on the distances measured at points in time during a stop of the mobile unit. A weighting factor is determined based on the index value computed for every satellite. A weighted positioning computation using the determined weighting factor is performed to determine a position of the mobile unit during movement using an observed value of the phase acquired during movement.
    Type: Grant
    Filed: February 19, 2008
    Date of Patent: July 12, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Yasuhiro Tajima, Naoto Hasegawa
  • Patent number: 7869950
    Abstract: A positioning system 10 includes a positioning unit 15 configured to perform position estimation based on radio signals from artificial satellites and an autonomous navigation unit 14 configured to perform position estimation by autonomous navigation. In the positioning system 10, the positioning unit 15 and the autonomous navigation unit 14 estimate the position of a mobile body in cooperation with each other; and when the number of the artificial satellites available is less than three, the positioning unit determines a point in an area calculated based on the radio signals which point is closest to an inertial-navigation-based position calculated by autonomous navigation, and uses the determined point as a satellite-based position estimated based on the radio signals.
    Type: Grant
    Filed: February 15, 2007
    Date of Patent: January 11, 2011
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Yasuhiro Tajima
  • Publication number: 20100169006
    Abstract: A positioning system 10 includes a positioning unit 15 configured to perform position estimation based on radio signals from artificial satellites and an autonomous navigation unit 14 configured to perform position estimation by autonomous navigation. In the positioning system 10, the positioning unit 15 and the autonomous navigation unit 14 estimate the position of a mobile body in cooperation with each other; and when the number of the artificial satellites available is less than three, the positioning unit determines a point in an area calculated based on the radio signals which point is closest to an inertial-navigation-based position calculated by autonomous navigation, and uses the determined point as a satellite-based position estimated based on the radio signals.
    Type: Application
    Filed: February 15, 2007
    Publication date: July 1, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Yasuhiro Tajima
  • Publication number: 20100026566
    Abstract: In a mobile-unit positioning device, phases of pseudo noise codes carried on satellite signals from satellites are observed at a mobile unit to measure a position of the mobile unit. A pseudo distance between one of the satellites and the mobile unit is measured for every satellite during a stop of the mobile unit using an observed value of the phase acquired during a stop of the mobile unit. An error index value indicating an error of the measured distance is computed based on the distances measured at points in time during a stop of the mobile unit. A weighting factor is determined based on the index value computed for every satellite. A weighted positioning computation using the determined weighting factor is performed to determine a position of the mobile unit during movement using an observed value of the phase acquired during movement.
    Type: Application
    Filed: February 19, 2008
    Publication date: February 4, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Yasuhiro Tajima, Naoto Hasegawa
  • Publication number: 20100019963
    Abstract: A vehicular navigation and positioning method and system includes a GNSS receiver, an inertial navigation system and on-board vehicular sensors. Available data is integrated by a Kalman filter and vehicle position, velocity and attitude is updated as a result.
    Type: Application
    Filed: June 15, 2006
    Publication date: January 28, 2010
    Applicants: UTI LIMITED PARTNERSHIP, TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Jianchen Gao, Elizabeth Cannon, Mark Petovello, Kiyomi Nagamiya, Iwao Maeda, Kazunori Kagawa
  • Publication number: 20100007550
    Abstract: A positioning apparatus for a mobile object for measuring a position at a current time includes a GPS positioning unit for updating a GPS operation data; an INS positioning unit with a detection value for INS positioning; a speed detector for detecting speed; an error corrector for correcting an error of the detection value, the position measured by the INS positioning and the speed; and a mobile object model operation unit for calculating a mobile object model; wherein an initial position is calculated using the GPS operation data, and the mobile object model operation unit measures the position to the current time when the current time coincides with a GPS updating time; and wherein the initial position is calculated without the GPS operation data, and the mobile object model operation unit measures the position to the current time when the current time does not coincide with a GPS updating time.
    Type: Application
    Filed: June 24, 2009
    Publication date: January 14, 2010
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kiyomi Nagamiya, Akihiro Ueda, Iwao Maeda, Norimasa Kobori
  • Publication number: 20090326858
    Abstract: To provide an attitude-angle detecting apparatus, which detects an attitude angle of a mobile object during movement with good accuracy by correcting an output value from an acceleration sensor, and to provide a method for the same. It is characterized in that it comprises an acceleration sensor 2 for measuring an acceleration being applied to a mobile object 7, a yaw-rate sensor 3 for measuring a yaw rate of the mobile object 7, a speed sensor 4 for measuring a speed of the mobile object 7, a mobile-component acceleration calculating means 5 for calculating an actual acceleration from the speed, calculating a centrifugal force from the yaw rate and the speed and calculating a mobile-component acceleration, a resultant force of the actual speed and the centrifugal force, and an attitude-angle calculating means 6 for calculating an attitude angle from a gravitational acceleration, which is obtainable by correcting the acceleration with the mobile-component acceleration.
    Type: Application
    Filed: June 25, 2007
    Publication date: December 31, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro Ueda, Iwao Maeda, Kiyomi Nagamiya, Naoto Shibata
  • Publication number: 20090088976
    Abstract: An azimuth detecting device mounted in a mobile object and having: a geomagnetic sensor; GPS signal receiving means; and measuring means for measuring a position of the mobile object by using a GPS signal, the azimuth detecting device being characterized in calculating a gain correction amount by means of a method of least squares, using an output value of the geomagnetic sensor when a level of the GPS signal received by the GPS signal receiving means is lower than a predetermined level, and calculating a declination correction amount and/or an inclination correction amount on the basis of information obtained from the GPS signal and correcting the output value of the geomagnetic sensor, when the level of the GPS signal is at least the predetermined level.
    Type: Application
    Filed: October 1, 2008
    Publication date: April 2, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akihiro UEDA, Iwao Maeda, Kiyomi Nagamiya, Naoto Shibata
  • Publication number: 20080262730
    Abstract: A mobile object position estimation apparatus mounted in a mobile object includes a first estimation mechanism for estimating the mobile object position based on the outputs from an inertial navigation sensor device (acceleration sensor, and yaw rate sensor, or the like) mounted on the mobile object, a storage for storing map information including at least node information, a second estimation mechanism for estimating the mobile object position based on a predicted path of traveling of the mobile object predicted from the node information, and a synthesis mechanism for determining the final estimated mobile object position by synthesizing the mobile object position estimated by the first estimation mechanism and the mobile object position estimated by the second estimation mechanism.
    Type: Application
    Filed: November 17, 2006
    Publication date: October 23, 2008
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hirohisa Onome, Kazunori Kagawa, Yasuhiro Tajima, Iwao Maeda, Kiyomi Nagamiya, Akihiro Ueda
  • Patent number: 6638652
    Abstract: A fuel cell control apparatus for controlling the supply amount of oxidizing gas to a fuel cell for producing electric energy by reaction between fuel gas and oxidizing gas includes a smoother for smoothing the output related quantity of the fuel cell, and an oxidizing gas feed determining device for determining the supply amount of the oxidizing gas on the basis of the output related quantity smoothed by the smoother, and therefore when controlling the amounts of the fuel gas and oxidizing gas depending on the output demand of the fuel cell, the substantial power generation efficiency is enhanced and the output is stabilized at the same time.
    Type: Grant
    Filed: September 9, 1999
    Date of Patent: October 28, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yoshikazu Motozono, Masashi Yamashita, Masaaki Yamaoka, Kiyomi Nagamiya, Iwao Maeda
  • Patent number: 6630109
    Abstract: A control apparatus for a reformer and a method of controlling the reformer are provided. The reformer gasifies a reformate fuel by a reforming reaction, supplies the obtained reformate gas to an energy converter to convert the reformate gas into energy of another form, and heats the reformate fuel by burning emission containing unreacted flammable gas produced in the energy converter. The control apparatus comprises a reforming amount assessing device for assessing the amount of the reformate fuel to be gasified, and an emission amount assessing device for assessing the amount of emission to be supplied into the reformer on the basis of the assessed amount of reformate fuel. When using the unreacted hydrogen gas generated in a fuel cell for heating the reformate fuel, the unreacted hydrogen gas and combustion aid gas can be controlled so that the reformate fuel is heated properly.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: October 7, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masaaki Yamaoka, Masashi Yamashita, Kiyomi Nagamiya, Yoshikazu Motozono, Iwao Maeda, Masayoshi Taki
  • Patent number: 6613465
    Abstract: A fuel reforming apparatus has a heating device, a reformer, and a CO oxidizing device. The heating device has a burning device for oxidizing fuel for burning with air and a vaporizing device for vaporizing the raw fuel. The control device for the fuel reforming apparatus has a raw fuel quantity determinator and a target temperature setting means for setting the target temperature of the raw fuel. The raw fuel quantity determinator determines a quantity of raw fuel supplied to the heating device. On the basis of the quantity of raw fuel supplied to the heating device by the determination of the raw fuel quantity determinator, the target temperature setting means sets a target temperature of the raw fuel. The heating device then heats the raw fuel to the predetermined target temperature by the control of the above-mentioned control device.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: September 2, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Masaaki Yamaoka, Masashi Yamashita, Iwao Maeda, Kiyomi Nagamiya
  • Patent number: 6578796
    Abstract: A liquid dropping apparatus for a helicopter includes a tank for containing a liquid therein for attachment below a helicopter body. The tank has a lower surface with a concave portion formed by concaving a wall portion and has a liquid discharge port opened on a side surface of the concave portion. A door is provided on a bottom surface of the concave portion of the tank to pivotally swing around a side thereof closer to the bottom surface of the concave portion, thereby freely opening and closing the liquid discharge port. Drivers are provided for driving the door to open and close.
    Type: Grant
    Filed: December 11, 2001
    Date of Patent: June 17, 2003
    Assignee: Shinmaywa Industries, Ltd.
    Inventor: Iwao Maeda
  • Patent number: 6562501
    Abstract: A control system for a fuel cell to output an electric energy by a reaction between a fuel gas and an oxidizing gas. The control system comprises a humidifier for decreasing the humidification of the fuel cell when the pressure in the fuel cell is high, and for increasing the humidification of the fuel cell when the pressure in the fuel cell is low.
    Type: Grant
    Filed: November 28, 2000
    Date of Patent: May 13, 2003
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kiyomi Nagamiya, Masashi Yamashita, Iwao Maeda, Masaaki Yamaoka, Seiji Mizuno
  • Publication number: 20020084383
    Abstract: A liquid dropping apparatus for a helicopter includes a tank for containing a liquid therein for attachment below a helicopter body. The tank has a lower surface with a concave portion formed by concaving a wall portion and has a liquid discharge port opened on a side surface of the concave portion. A door is provided on a bottom surface of the concave portion of the tank to pivotally swing around a side thereof closer to the bottom surface of the concave portion, thereby freely opening and closing the liquid discharge port. Drivers are provided for driving the door to open and close.
    Type: Application
    Filed: December 11, 2001
    Publication date: July 4, 2002
    Inventor: Iwao Maeda