Patents by Inventor Fumihiko Okai

Fumihiko Okai 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: 7522092
    Abstract: A radar apparatus including units for transmitting and receiving an electric wave to detect a target, a unit for detecting wave interference caused by surroundings, a unit for controlling the modulation state of the transmitted wave, a communication unit for acquiring modulation state information being used by the other radar apparatuses, and a unit for selecting such a modulation state as to avoid interference with the modulation state information when the wave interference detecting unit detects the wave interference.
    Type: Grant
    Filed: January 19, 2007
    Date of Patent: April 21, 2009
    Assignee: Hitachi, Ltd.
    Inventors: Fumihiko Okai, Hiroshi Kuroda
  • Publication number: 20070200747
    Abstract: A radar apparatus including units for transmitting and receiving an electric wave to detect a target, a unit for detecting wave interference caused by surroundings, a unit for controlling the modulation state of the transmitted wave, a communication unit for acquiring modulation state information being used by the other radar apparatuses, and a unit for selecting such a modulation state as to avoid interference with the modulation state information when the wave interference detecting unit detects the wave interference.
    Type: Application
    Filed: January 19, 2007
    Publication date: August 30, 2007
    Applicant: HITACHI, LTD.
    Inventors: Fumihiko Okai, Hiroshi Kuroda
  • Patent number: 7259711
    Abstract: A vehicle control apparatus includes an obstruction detection unit for measuring a headway distance until an obstruction existing ahead of the vehicle by means of a radar device, a unit for performing vehicle control or alarm control on the basis of the headway distance, a unit for detecting detection performance of the obstruction detection means in a vehicle in which the obstruction detection unit is used to perform two or more controls containing the vehicle control or alarm control, and a unit for controlling to stop operation of the vehicle control or alarm control in accordance with the detection performance individually.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: August 21, 2007
    Assignee: Hitachi, Ltd.
    Inventors: Fumihiko Okai, Hiroshi Kuroda
  • Patent number: 7061424
    Abstract: The present invention provides a radar device mounted on a moving object that moves along a continuous plane, having (1) a transceiver part for transmitting a signal having a main lobe in the direction of the movement of the moving object and a side lobe directed towards the continuous plane, that receives a first reflection signal from a target in the direction of the main lobe and a second reflection signal from the continuous plane in the direction of the side lobe, and (2) control processing means for detecting the frequency of a beat signal of the second reflection signal received by the transceiver part and the signal emitted by the transceiver part and for detecting information correlated to the attitude of the radar device with respect to the continuous plane based on that frequency. This enables detection of changes of mounting attitude for the moving object without requiring additional hardware.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: June 13, 2006
    Assignee: Hitachi, Ltd.
    Inventors: Hiroshi Kuroda, Kazuaki Takano, Fumihiko Okai
  • Publication number: 20050017891
    Abstract: The present invention provides a radar device mounted on a moving object that moves along a continuous plane, having (1) a transceiver part for transmitting a signal having a main lobe in the direction of the movement of the moving object and a side lobe directed towards the continuous plane, that receives a first reflection signal from a target in the direction of the main lobe and a second reflection signal from the continuous plane in the direction of the side lobe, and (2) control processing means for detecting the frequency of a beat signal of the second reflection signal received by the transceiver part and the signal emitted by the transceiver part and for detecting information correlated to the attitude of the radar device with respect to the continuous plane based on that frequency. This enables detection of changes of mounting attitude for the moving object without requiring additional hardware.
    Type: Application
    Filed: January 18, 2002
    Publication date: January 27, 2005
    Inventors: Hiroshi Kuroda, Kazuaki Takano, Fumihiko Okai
  • Patent number: 6819283
    Abstract: A vehicle control apparatus includes an obstruction detection unit for measuring a headway distance until an existing ahead of the vehicle by means of a radar device, a unit for performing vehicle control or alarm control on the basis of the headway distance, a unit for detecting detection performance of the obstruction detection means in a vehicle in which the obstruction detection unit is used to perform two or more controls containing the vehicle control or alarm control, and a unit for controlling to stop operation of the vehicle control or alarm control in accordance with the detection performance individually.
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: November 16, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Fumihiko Okai, Hiroshi Kuroda
  • Publication number: 20040130481
    Abstract: A vehicle control apparatus includes an obstruction detection unit for measuring a headway distance until an obstruction existing ahead of the vehicle by means of a radar device, a unit for performing vehicle control or alarm control on the basis of the headway distance, a unit for detecting detection performance of the obstruction detection means in a vehicle in which the obstruction detection unit is used to perform two or more controls containing the vehicle control or alarm control, and a unit for controlling to stop operation of the vehicle control or alarm control in accordance with the detection performance individually.
    Type: Application
    Filed: December 19, 2003
    Publication date: July 8, 2004
    Inventors: Fumihiko Okai, Hiroshi Kuroda
  • Publication number: 20030016161
    Abstract: A vehicle control apparatus includes an obstruction detection unit for measuring a headway distance until an existing ahead of the vehicle by means of a radar device, a unit for performing vehicle control or alarm control on the basis of the headway distance, a unit for detecting detection performance of the obstruction detection means in a vehicle in which the obstruction detection unit is used to perform two or more controls containing the vehicle control or alarm control, and a unit for controlling to stop operation of the vehicle control or alarm control in accordance with the detection performance individually.
    Type: Application
    Filed: February 27, 2002
    Publication date: January 23, 2003
    Applicant: Hitachi, Ltd.
    Inventors: Fumihiko Okai, Hiroshi Kuroda
  • Publication number: 20010026237
    Abstract: A millimeter wave radar excelling in detection performance, in which a shielding member is provided in a lower front part of a transmission/reception antenna to protrude from the transmission/reception antenna and background noise due to side lobes is thereby reduced, can be provided easily and inexpensively.
    Type: Application
    Filed: January 19, 2001
    Publication date: October 4, 2001
    Inventors: Fumihiko Okai, Kazuhiko Hanawa, Kazuaki Takano