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).
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Patent number: 7522092Abstract: 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: GrantFiled: January 19, 2007Date of Patent: April 21, 2009Assignee: Hitachi, Ltd.Inventors: Fumihiko Okai, Hiroshi Kuroda
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Publication number: 20070200747Abstract: 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: ApplicationFiled: January 19, 2007Publication date: August 30, 2007Applicant: HITACHI, LTD.Inventors: Fumihiko Okai, Hiroshi Kuroda
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Patent number: 7259711Abstract: 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: GrantFiled: December 19, 2003Date of Patent: August 21, 2007Assignee: Hitachi, Ltd.Inventors: Fumihiko Okai, Hiroshi Kuroda
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Patent number: 7061424Abstract: 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: GrantFiled: January 18, 2002Date of Patent: June 13, 2006Assignee: Hitachi, Ltd.Inventors: Hiroshi Kuroda, Kazuaki Takano, Fumihiko Okai
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Publication number: 20050017891Abstract: 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: ApplicationFiled: January 18, 2002Publication date: January 27, 2005Inventors: Hiroshi Kuroda, Kazuaki Takano, Fumihiko Okai
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Patent number: 6819283Abstract: 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: GrantFiled: February 27, 2002Date of Patent: November 16, 2004Assignee: Hitachi, Ltd.Inventors: Fumihiko Okai, Hiroshi Kuroda
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Publication number: 20040130481Abstract: 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: ApplicationFiled: December 19, 2003Publication date: July 8, 2004Inventors: Fumihiko Okai, Hiroshi Kuroda
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Publication number: 20030016161Abstract: 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: ApplicationFiled: February 27, 2002Publication date: January 23, 2003Applicant: Hitachi, Ltd.Inventors: Fumihiko Okai, Hiroshi Kuroda
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Publication number: 20010026237Abstract: 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: ApplicationFiled: January 19, 2001Publication date: October 4, 2001Inventors: Fumihiko Okai, Kazuhiko Hanawa, Kazuaki Takano