Patents by Inventor Kado Nakagawa
Kado Nakagawa 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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Publication number: 20230129370Abstract: Provided is a technology in which a control device of a converter performs gate cutoff for cutting off power supply to a load when one of a battery detection value obtained by a battery voltage sensor or a low-voltage-side detection value obtained by a low-voltage-side voltage sensor or both thereof are abnormal values. After the control device performs the gate cutoff, the control device determines whether or not a main body circuitry is abnormal based on the battery detection value and the low-voltage-side detection value. When the control device determines that the main body circuitry is not abnormal, the control device determines whether one of the battery voltage sensor or the low-voltage-side voltage sensor is abnormal based on the battery detection value, the low-voltage-side detection value, and a high-voltage-side detection value obtained by a high-voltage-side voltage sensor.Type: ApplicationFiled: April 8, 2022Publication date: April 27, 2023Applicant: Mitsubishi Electric CorporationInventors: Kado NAKAGAWA, Jino Yoon, Nobuhiro Kihara, Mai Nakada
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Publication number: 20220368271Abstract: An object is to achieve overheat protection for a converter and stable voltage output thereof. This power supply device includes: a converter connected to power supply voltage and having a plurality of switching elements; a temperature detection circuit for detecting a temperature of the converter; an inverter which is connected between the converter and a load, and which converts output voltage of the converter and outputs resultant voltage to the load; and a control unit for controlling the switching elements of the converter. When the temperature detected by the temperature detection circuit has exceeded a first limitation value, the control unit controls the switching elements so that the output voltage of the converter becomes the power supply voltage at a set change rate.Type: ApplicationFiled: March 17, 2022Publication date: November 17, 2022Applicant: Mitsubishi Electric CorporationInventors: Masaki SHOJI, Nobuhiro KIHARA, Kado NAKAGAWA
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Patent number: 8760341Abstract: Provided is a radar device capable of preventing mispairing from occurring, and obtaining a distance to a target and a relative velocity to the target even if at least one of the peak frequencies of beat signals cannot be extracted and pairs of the peak frequencies cannot be generated. A target estimation part (20) estimates a distance (RN) to a target (21, 22) and a relative velocity (VN) to the target (21, 22) based on a distance (RO) to the target (21, 22) and a relative velocity (VO) to the target (21, 22), which have been decided by a target decision part (13) in a previous cycle, when at least one of the peak frequencies of the beat signal cannot be extracted and the pair of the peak frequencies cannot be generated.Type: GrantFiled: March 31, 2011Date of Patent: June 24, 2014Assignee: Mitsubishi Electric CorporationInventor: Kado Nakagawa
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Publication number: 20120092209Abstract: Provided is a radar device capable of preventing mispairing from occurring, and obtaining a distance to a target and a relative velocity to the target even if at least one of the peak frequencies of beat signals cannot be extracted and pairs of the peak frequencies cannot be generated. A target estimation part (20) estimates a distance (RN) to a target (21, 22) and a relative velocity (VN) to the target (21, 22) based on a distance (RO) to the target (21, 22) and a relative velocity (VO) to the target (21, 22), which have been decided by a target decision part (13) in a previous cycle, when at least one of the peak frequencies of the beat signal cannot be extracted and the pair of the peak frequencies cannot be generated.Type: ApplicationFiled: March 31, 2011Publication date: April 19, 2012Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Kado NAKAGAWA
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Patent number: 8102309Abstract: Provided is a radar device capable of accurately calculating directions and the number of targets. A direction calculation unit includes a correlation matrix addition prohibition unit that prohibits, when a peak frequency in a plurality of modulation periods of a target is in the vicinity of 0, addition of a correlation matrix generated from a peak frequency spectrum having the peak frequency in the vicinity of 0, and calculates the direction of the target on the basis of a summed correlation matrix in which correlation matrices generated from peak frequency spectra having peak frequencies out of the vicinity of 0.Type: GrantFiled: April 23, 2009Date of Patent: January 24, 2012Assignee: Mitsubishi Electric CorporationInventor: Kado Nakagawa
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Patent number: 7893868Abstract: A radar device is mounted on a vehicle, for detecting an object, and includes: a transmitting unit for transmitting an electromagnetic wave as a transmitter signal; a receiving unit for receiving a reflected signal that is reflected from the object as a receiver signal; a signal processing unit for measuring a distance and a relative velocity between the vehicle and the object on the basis of a beat signal that is obtained by the transmitter signal and the receiver signal; and an interference detecting unit for detecting the interference signal from another radar device or a communication device on the basis of a signal intensity of the frequency range that is not used for measuring the distance to the object and the relative velocity of the object.Type: GrantFiled: July 30, 2009Date of Patent: February 22, 2011Assignee: Mitsubishi Electric CorporationInventors: Kenichi Akita, Kado Nakagawa
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Publication number: 20100134343Abstract: Provided is a radar device capable of accurately calculating directions and the number of targets. A direction calculation unit includes a correlation matrix addition prohibition unit that prohibits, when a peak frequency in a plurality of modulation periods of a target is in the vicinity of 0, addition of a correlation matrix generated from a peak frequency spectrum having the peak frequency in the vicinity of 0, and calculates the direction of the target on the basis of a summed correlation matrix in which correlation matrices generated from peak frequency spectra having peak frequencies out of the vicinity of 0.Type: ApplicationFiled: April 23, 2009Publication date: June 3, 2010Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Kado Nakagawa
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Patent number: 7719460Abstract: In a radar device including a transmitting unit for transmitting a transmission signal having plural modulation sections, a receiving unit for receiving a reflection signal obtained through reflection of the transmission signal from a target by an array antenna having plural channels, a mixing unit for mixing the transmission signal with reception signals of the plural channels to obtain beat signals of the plural channels, a frequency analyzing unit for frequency-analyzing the beat signals of the plural channels, and a direction calculating unit for calculating the direction to the target on the basis of frequency analysis results of the plural channels, the direction calculating unit adds correlation matrixes generated from peak frequency spectra of the plural modulation sections to obtain an summed correlation matrix, and calculating the direction to the target on the basis of the summed correlation matrix.Type: GrantFiled: April 16, 2009Date of Patent: May 18, 2010Assignee: Mitsubishi Electric CorporationInventor: Kado Nakagawa
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Publication number: 20100109939Abstract: In a radar device including a transmitting unit for transmitting a transmission signal having plural modulation sections, a receiving unit for receiving a reflection signal obtained through reflection of the transmission signal from a target by an array antenna having plural channels, a mixing unit for mixing the transmission signal with reception signals of the plural channels to obtain beat signals of the plural channels, a frequency analyzing unit for frequency-analyzing the beat signals of the plural channels, and a direction calculating unit for calculating the direction to the target on the basis of frequency analysis results of the plural channels, the direction calculating unit adds correlation matrixes generated from peak frequency spectra of the plural modulation sections to obtain an summed correlation matrix, and calculating the direction to the target on the basis of the summed correlation matrix.Type: ApplicationFiled: April 16, 2009Publication date: May 6, 2010Applicant: Mitsubishi Electric CorporationInventor: Kado NAKAGAWA
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Patent number: 7692574Abstract: A radar apparatus can improve detection performance of a target, obtain high resolution without changing antenna construction, and suppress calculation load. A target detection unit, which calculates a distance, a relative speed, or a direction of the target based on frequency analysis results for a plurality of channels, includes a channel to channel integration unit that integrates, for each of the same frequencies, beat frequency spectra for the plurality of channels in the form of frequency analysis results for beat signals obtained for each of a plurality of receiving antennas, and a direction calculation unit that calculates the direction of the target from the beat frequency spectra for the plurality of channels.Type: GrantFiled: March 5, 2008Date of Patent: April 6, 2010Assignee: Mitsubishi Electric CorporationInventor: Kado Nakagawa
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Publication number: 20090289831Abstract: A radar device is mounted on a vehicle, for detecting an object, and includes: a transmitting unit for transmitting an electromagnetic wave as a transmitter signal; a receiving unit for receiving a reflected signal that is reflected from the object as a receiver signal; a signal processing unit for measuring a distance and a relative velocity between the vehicle and the object on the basis of a beat signal that is obtained by the transmitter signal and the receiver signal; and an interference detecting unit for detecting the interference signal from another radar device or a communication device on the basis of a signal intensity of the frequency range that is not used for measuring the distance to the object and the relative velocity of the object.Type: ApplicationFiled: July 30, 2009Publication date: November 26, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kenichi AKITA, Kado NAKAGAWA
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Publication number: 20090073026Abstract: A radar apparatus can improve detection performance of a target, obtain high resolution without changing antenna construction, and suppress calculation load. A target detection unit, which calculates a distance, a relative speed, or a direction of the target based on frequency analysis results for a plurality of channels, includes a channel to channel integration unit that integrates, for each of the same frequencies, beat frequency spectra for the plurality of channels in the form of frequency analysis results for beat signals obtained for each of a plurality of receiving antennas, and a direction calculation unit that calculates the direction of the target from the beat frequency spectra for the plurality of channels.Type: ApplicationFiled: March 5, 2008Publication date: March 19, 2009Applicant: MITSUBISHI ELECTRIC CORPORATIONInventor: Kado NAKAGAWA
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Publication number: 20080100493Abstract: A radar device is mounted on a vehicle, for detecting an object, and includes: a transmitting unit for transmitting an electromagnetic wave as a transmitter signal; a receiving unit for receiving a reflected signal that is reflected from the object as a receiver signal; a signal processing unit for measuring a distance and a relative velocity between the vehicle and the object on the basis of a beat signal that is obtained by the transmitter signal and the receiver signal; and an interference detecting unit for detecting the interference signal from another radar device or a communication device on the basis of a signal intensity of the frequency range that is not used for measuring the distance to the object and the relative velocity of the object.Type: ApplicationFiled: February 21, 2007Publication date: May 1, 2008Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Kenichi AKITA, Kado NAKAGAWA
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Patent number: 7221310Abstract: The present invention provides an electric wave axis adjusting apparatus for an on-vehicle radar capable of readily and precisely adjusting an electric wave axis only by making the scanning range and a detection range identical to each other and changing a scanning range, and of adjusting the electric wave axis of an on-vehicle radar without wasting time in order to detect a reflector.Type: GrantFiled: May 18, 2005Date of Patent: May 22, 2007Assignee: Mitsubishi Denki Kabushiki KaishaInventor: Kado Nakagawa
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Publication number: 20060176214Abstract: The present invention provides an electric wave axis adjusting apparatus for an on-vehicle radar capable of readily and precisely adjusting an electric wave axis only by making the scanning range and a detection range identical to each other and changing a scanning range, and of adjusting the electric wave axis of an on-vehicle radar without wasting time in order to detect a reflector.Type: ApplicationFiled: May 18, 2005Publication date: August 10, 2006Applicant: MITSUBISHI DENKI KABUSHIKI KAISHAInventor: Kado Nakagawa