Patents by Inventor Kanako Honda
Kanako Honda 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: 7724802Abstract: A radar apparatus includes a transmission section, a delay device, a reception section, a switch control section, a switching frequency detection section, and a relative distance calculation section. The transmission section transmits a signal wave, which is spectrum spread by using a spread code. The delay device gives delay to the spread code. The reception section receives a wave reflected by an object and spectrum despreads the reflected wave with using the delayed spread code to output a despread signal. The switch control section switches at a switching frequency an operation of at least one of the transmission section, the reception section, and the delay device. The switching frequency detection section detects the switching frequency from the despread signal. The relative distance calculation section calculates a distance to the object based on a detection result provided by the switching frequency detection section and an amount of the delay.Type: GrantFiled: September 23, 2004Date of Patent: May 25, 2010Assignee: Fujitsu Ten LimitedInventors: Kanako Honda, Osamu Isaji
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Patent number: 7612706Abstract: An antenna unit includes at least one transmission antenna and plural reception antennas. A receiver detects information including azimuth information for a target, based on an output from the antenna unit. An antenna switching unit switches connections between a transmitter and the transmission antenna and between the reception antenna and the receiver. The antenna unit includes a wide-beam array antenna and plural narrow-beam array antennas having a narrower beam width than the array antenna. A monopulse process is performed based on an output of a predetermined pair of array antennas from among the array antennas formed as the narrow-beam array antennas.Type: GrantFiled: July 15, 2005Date of Patent: November 3, 2009Assignee: Fujitsu Ten LimitedInventors: Kanako Honda, Kenji Oka, Kimihisa Yoneda
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Patent number: 7605745Abstract: Provide an on-vehicle radar device that performs transmission control of a monitoring signal, following fixed rules, so that interference with other radar devices can be avoided with certainty. An on-vehicle radar device comprises a transceiver which transmits/receives a monitoring signal at a specified frequency band and transmits a priority order signal at a frequency within the above-mentioned frequency band, and a controller which switches the signals transmitted by the transceiver. The transceiver receives a priority order signal of another radar device, and when interference with the signal of the other radar device is detected, the controller, based on the priority order of that other device and on the priority order of the device itself, shifts, by a specified frequency amount, the frequency band of the monitoring signal transmitted by the transceiver.Type: GrantFiled: March 30, 2007Date of Patent: October 20, 2009Assignees: Fujitsu Ten Limited, Fujitsu LimitedInventors: Kanako Honda, Osamu Isaji, Kazuo Shirakawa, Naofumi Ohkubo, Tetsuo Seki
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Publication number: 20090160708Abstract: A radar apparatus having a transmit antenna which transmits a transmit wave, a receive antenna which receives a receive wave including a reflected wave reflected on a target of the transmit wave; and an interference detection unit which judges that interference has occurred, when, of the receive waves received by the receive antenna, an average value of received power corresponding to a large distance from the radar apparatus is a threshold value or more.Type: ApplicationFiled: January 21, 2009Publication date: June 25, 2009Applicants: FUJITSU TEN LIMITED, FUJITSU LIMITEDInventors: Masao Nakano, Kouichi Miyagawa, Kanako Honda, Yasuhiro Sekiguchi
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Patent number: 7532156Abstract: In a radar apparatus having a plurality of antennas having switches respectively, malfunctions of the switches are detected by comparing the reception signal levels of the respective antennas with one another. Specifically, if the difference among the reception signal levels is at least a predetermined value, it is determined that at least one switch malfunctions so as not to be turned ON. Moreover, if the difference among the signal levels is smaller than the gain difference of each antenna and is substantially the same, it is determined that there is a malfunction in which all of the compared switches are not turned OFF. In addition, in an OFF state of each switch, if a reception signal of a predetermined level or more is detected, it is determined that there is a malfunction in which at least one switch is not turned OFF.Type: GrantFiled: November 22, 2006Date of Patent: May 12, 2009Assignee: Fujitsu Ten LimitedInventor: Kanako Honda
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Patent number: 7495603Abstract: The invention is directed to reducing the number of high-frequency components in a phase monopulse radar. A received signal selected by alternately selecting two antennas by a first switch is amplified by a receiver amplifier and mixed in a mixer with a portion of a transmitter signal. Each beat signal output from the mixer is distributed via a second switch to a selected one of two processing systems.Type: GrantFiled: September 7, 2005Date of Patent: February 24, 2009Assignee: Fujitsu Ten LimitedInventors: Kanako Honda, Osamu Isaji
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Patent number: 7456781Abstract: A radar includes a transmission section, a heterodyne reception section, a power supply section and a detection section. The transmission section emits a transmission wave to a target. The heterodyne reception section receives a reflected wave from the target. The power supply section supplies power to the reception section. A switching frequency of the power supply section is in synchronization with a local oscillation frequency of the reception section. The detection section determines that the switching frequency is out of synchronization with the local oscillation frequency when a certain peak frequency existing in an output signal of the reception section before a transmission state of the transmission section is changed still exists in the output signal of the reception section after the transmission state of the transmission section is changed.Type: GrantFiled: March 3, 2006Date of Patent: November 25, 2008Assignee: Fujitsu Ten LimitedInventor: Kanako Honda
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Patent number: 7450056Abstract: The search/detection apparatus modulates a carrier signal by a modulation signal, generates a probe signal for detecting the location of a target, and receives the probe signal reflected by the target as an echo signal. Then, the search/detection apparatus detects the existence of an interference signal other than the echo signal from the received signal and modifies the parameter of the modulation signal and/or carrier signal.Type: GrantFiled: May 31, 2006Date of Patent: November 11, 2008Assignees: Fujitsu Limited, Fujitsu Ten LimitedInventors: Kazuo Shirakawa, Naofumi Ohkubo, Tetsuo Seki, Kanako Honda, Osamu Isaji
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Patent number: 7439905Abstract: In a radar apparatus constructed to perform switching between a plurality of receiving antennas by using a switch, the effect of noise induced by the antenna switching is eliminated. A situation where there is no echo signal from a target is created, for example, by turning off a transmitter amplifier, and the Fourier transformed result obtained at this time is taken as a correction value and stored in a memory. During radar operation, the effect of the noise induced by the antenna switching can be eliminated by subtracting the correction value from the Fourier transformed result.Type: GrantFiled: August 23, 2005Date of Patent: October 21, 2008Assignee: Fujitsu Ten LimitedInventors: Kanako Honda, Osamu Isaji
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Publication number: 20080106458Abstract: Provide an on-vehicle radar device that performs transmission control of a monitoring signal, following fixed rules, so that interference with other radar devices can be avoided with certainty. An on-vehicle radar device comprises a transceiver which transmits/receives a monitoring signal at a specified frequency band and transmits a priority order signal at a frequency within the above-mentioned frequency band, and a controller which switches the signals transmitted by the transceiver. The transceiver receives a priority order signal of another radar device, and when interference with the signal of the other radar device is detected, the controller, based on the priority order of that other device and on the priority order of the device itself, shifts, by a specified frequency amount, the frequency band of the monitoring signal transmitted by the transceiver.Type: ApplicationFiled: March 30, 2007Publication date: May 8, 2008Applicants: FUJITSU TEN LIMITED, FUJITSU LIMITEDInventors: Kanako Honda, Osamu Isaji, Kazuo Shirakawa, Naofumi Ohkubo, Tetsuo Seki
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Patent number: 7301496Abstract: In an FM-CW radar apparatus which determines the azimuth to a target by a phase monopulse technique, an abnormal value resulting from the presence of multiple targets is detected. Three receiving antennas are arranged at spacings of 5?/4 and 6?/4, respectively, and it is determined whether the difference between the azimuth obtained from the combination of the receiving antennas spaced 5?/4 apart and the azimuth obtained from the combination of the receiving antennas spaced 6?/4 apart is smaller than a predetermined value or not; when the condition has been satisfied n times in succession, it is determined that the detected value is normal. On the other hand, if the condition has not been satisfied n times in succession, or if the difference is not smaller than the predetermined value, it is determined that the detected value is an abnormal value resulting from the presence of multiple targets.Type: GrantFiled: July 27, 2005Date of Patent: November 27, 2007Assignees: Fujitsu Ten Limited, Fujitsu LimitedInventors: Kanako Honda, Masao Nakano
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Publication number: 20070188373Abstract: The search/detection apparatus modulates a carrier signal by a modulation signal, generates a probe signal for detecting the location of a target, and receives the probe signal reflected by the target as an echo signal. Then, the search/detection apparatus detects the existence of an interference signal other than the echo signal from the received signal and modifies the parameter of the modulation signal and/or carrier signal.Type: ApplicationFiled: May 31, 2006Publication date: August 16, 2007Applicants: Fujitsu Limited, Fujitsu Ten LimitedInventors: Kazuo SHIRAKAWA, Naofumi Ohkubo, Tetsuo Seki, Kanako Honda, Osamu Isaji
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Publication number: 20070182619Abstract: An antenna system is effectively formed in a limited space, to make a configuration of the antenna system a simple mechanism. In a monopulse radar apparatus, an antenna unit includes an array antenna (a wide-beam array antenna) formed by a part of antenna elements that are constituent elements of the antenna unit (an area K1), and a plurality of narrow-beam array antennas formed as array antennas having a narrower beam width than the array antenna. A monopulse process is performed based on an output of a predetermined pair of array antennas (areas K2 and K3) from among the array antennas formed as the narrow-beam array antennas.Type: ApplicationFiled: July 15, 2005Publication date: August 9, 2007Applicant: Fujitsu Ten LimitedInventors: Kanako Honda, Kenji Oka, Kimihisa Yoneda
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Publication number: 20070171122Abstract: A radar apparatus having a interference detection unit which computes an average value of received power from received signals corresponding to receiving waves received by the receiving antennas, and determines that interference has occurred when the difference between this average value and the average value of the previously computed received power is a threshold value or more. Moreover, in other interference detection method, the interference detection unit determines that interference has occurred when an average value of received power corresponding to a large distance is a threshold value or more. Furthermore, in other method, the interference detection unit determines that interference has occurred when a received power value is detected as a threshold value or more when a transmission wave is not transmitted from the transmission antenna.Type: ApplicationFiled: January 25, 2007Publication date: July 26, 2007Applicants: FUJITSU TEN LIMITED, FUJITSU LIMITEDInventors: Masao Nakano, Kouichi Miyagawa, Kanako Honda, Yasuhiro Sekiguchi
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Publication number: 20070115168Abstract: In a radar apparatus having a plurality of antennas having switches respectively, malfunctions of the switches are detected by comparing the reception signal levels of the respective antennas with one another. Specifically, if the difference among the reception signal levels is at least a predetermined value, it is determined that at least one switch malfunctions so as not to be turned ON. Moreover, if the difference among the signal levels is smaller than the gain difference of each antenna and is substantially the same, it is determined that there is a malfunction in which all of the compared switches are not turned OFF. In addition, in an OFF state of each switch, if a reception signal of a predetermined level or more is detected, it is determined that there is a malfunction in which at least one switch is not turned OFF.Type: ApplicationFiled: November 22, 2006Publication date: May 24, 2007Applicant: FUJITSU TEN LIMITEDInventor: Kanako Honda
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Patent number: 7221789Abstract: A method for image processing that compensates for inconsistent edge detection. A field of view of a camera is segmented in the form of a matrix by angle and by measured range value based on parallax; matrix data is calculated for a segment where a detected edge exists, and for segments surrounding the segment, the calculated matrix data is then assigned to each of the segments; a search is made through the assigned matrix data to find a segment that has matrix data exceeding a predetermined threshold value. If, the detected edge exists in the found segment, edge data of the edge is taken to represent the position of an object.Type: GrantFiled: August 19, 2003Date of Patent: May 22, 2007Assignee: Fujitsu Ten LimitedInventor: Kanako Honda
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Patent number: 7138939Abstract: A radar has a transmission section, a reception section that receives a reflected wave of the transmission wave, a transmission switch section, a delay section that delays a predetermined timing, a reception switching section, a difference processing section, and a calculation section. The transmission section switches between a first frequency and a second frequency to transmit a transmission wave having one of the frequencies. The transmission switch section switches between turning-on and turning-off of an operation of the transmission section at the predetermined timing. The reception switching section switches between turning-on and turning-off of an operation of the reception section according to the timing delayed. The difference processing section outputs a difference between the transmission wave and the reflected wave. The calculation section calculates a distance on a basis of a delay amount, when a detection waveform has a difference frequency between the first frequency and the second frequency.Type: GrantFiled: January 6, 2005Date of Patent: November 21, 2006Assignee: Fujitsu Ten LimitedInventor: Kanako Honda
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Publication number: 20060208940Abstract: A radar includes a transmission section, a heterodyne reception section, a power supply section and a detection section. The transmission section emits a transmission wave to a target. The heterodyne reception section receives a reflected wave from the target. The power supply section supplies power to the reception section. A switching frequency of the power supply section is in synchronization with a local oscillation frequency of the reception section. The detection section determines that the switching frequency is out of synchronization with the local oscillation frequency when a certain peak frequency existing in an output signal of the reception section before a transmission state of the transmission section is changed still exists in the output signal of the reception section after the transmission state of the transmission section is changed.Type: ApplicationFiled: March 3, 2006Publication date: September 21, 2006Applicant: FUJITSU TEN LIMITEDInventor: Kanako Honda
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Publication number: 20060055589Abstract: The invention is directed to reducing the number of high-frequency components in a phase monopulse radar. A received signal selected by alternately selecting two antennas by a first switch is amplified by a receiver amplifier and mixed in a mixer with a portion of a transmitter signal. Each beat signal output from the mixer is distributed via a second switch to a selected one of two processing systems.Type: ApplicationFiled: September 7, 2005Publication date: March 16, 2006Applicant: FUJITSU TEN LIMITEDInventors: Kanako Honda, Osamu Isaji
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Publication number: 20060055593Abstract: In a radar apparatus constructed to perform switching between a plurality of receiving antennas by using a switch, the effect of noise induced by the antenna switching is eliminated. A situation where there is no echo signal from a target is created, for example, by turning off a transmitter amplifier, and the Fourier transformed result obtained at this time is taken as a correction value and stored in a memory. During radar operation, the effect of the noise induced by the antenna switching can be eliminated by subtracting the correction value from the Fourier transformed result.Type: ApplicationFiled: August 23, 2005Publication date: March 16, 2006Applicant: Fujitsu Ten LimitedInventors: Kanako Honda, Osamu Isaji