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公开(公告)号：US11448723B2
公开(公告)日：2022-09-20
申请号：US16936392
申请日：2020-07-22
Applicant: DENSO CORPORATION
Inventor： Takayuki Kitamura , Takuya Takayama , Kazuhiro Aoki
Abstract: A transmission antenna unit includes transmission antennas arranged in a row along a predetermined array direction at a predetermined first interval. A reception antenna unit includes reception antennas arranged in a row along the array direction at a second interval set to differ from the first interval. The transmission antennas and the reception antennas form a virtual array in which virtual reception antennas are arranged in a row along the array direction. The first interval is equal to a multiplication value of a minimum interval being a minimum value of an arrangement interval of the virtual reception antennas and a first multiple being an integer of 2 or greater. The second interval is equal to a multiplication value of the minimum interval and a second multiple being an integer of 2 or greater and set to differ from the first multiple. The first and second multiples are coprime.
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公开(公告)号：US11156696B2
公开(公告)日：2021-10-26
申请号：US16936394
申请日：2020-07-22
Applicant: DENSO CORPORATION
Inventor： Takayuki Kitamura
Abstract: A transmission antenna unit includes a plurality of transmission antennas, a reception antenna unit, and a processor. The plurality of transmission antennas that are arranged in a row along a predetermined array direction. The reception antenna unit includes a plurality of reception antennas that are arranged in a row along the array direction. The plurality of transmission antennas and the plurality of reception antennas form a virtual array in which a plurality of virtual reception antennas are arranged in a row along the array direction. The processor corrects a plurality of virtual reception signals by multiplying a virtual reception signal matrix by an inverse matrix of a reception mutual coupling matrix and an inverse matrix of a transmission mutual coupling matrix.
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公开(公告)号：US11841454B2
公开(公告)日：2023-12-12
申请号：US17062165
申请日：2020-10-02
Applicant: SOKEN, INC. , DENSO CORPORATION
Inventor： Yusuke Akamine , Takayuki Kitamura , Yasuyuki Miyake
CPC classification number: G01S7/023 , G01S7/0232 , G01S7/0235 , G01S7/411 , G01S7/415 , G01S13/584
Abstract: A radar system is provided with a plurality of radar units. Each radar unit includes a first processing unit for calculating a distance and a relative speed to an object in the vicinity of each radar unit in accordance with a beat signal, a frequency band of the first modulated waves being a first frequency band, and a modulation period of the first modulated waves being a first modulation period; a second processing unit for calculating a distance to the object in accordance with a beat signal, a frequency band of the second modulated waves being a second frequency band, and a modulation period of the second modulated waves being a second modulation period; and a calculation result determination unit for determining the distance and the relative speed to the object in accordance with calculation results of the first and second processing units.
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公开(公告)号：US10908260B2
公开(公告)日：2021-02-02
申请号：US15553513
申请日：2016-02-25
Applicant: DENSO CORPORATION
Inventor： Takayuki Kitamura
IPC: G01S7/40 , G01S13/931 , G01S7/41
Abstract: In a mounting angle error detection method, a relative speed to an object that has reflected continuous waves is determined. An estimated orientation of the object is determined for each frequency bin. An approximated straight line that indicates a relationship between a relative speed of a stationary object relative to the own vehicle and an orientation at which the stationary object is positioned is calculated from the relative speed and estimated orientation determined. As a mounting angle error of the onboard radar apparatus, a difference between an orientation angle identified from the approximated straight line and at which the relative speed of the stationary object relative to the own vehicle is zero, and an orientation angle at which the relative speed of the stationary object relative to the own vehicle is zero when the onboard radar apparatus is mounted in the own vehicle at a predetermined mounting angle is determined.
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公开(公告)号：US20210018588A1
公开(公告)日：2021-01-21
申请号：US17062165
申请日：2020-10-02
Applicant: SOKEN, INC. , DENSO CORPORATION
Inventor： Yusuke Akamine , Takayuki Kitamura , Yasuyuki Miyake
Abstract: A radar system is provided with a plurality of radar units. Each radar unit includes a first processing unit for calculating a distance and a relative speed to an object in the vicinity of each radar unit in accordance with a beat signal, a frequency band of the first modulated waves being a first frequency band, and a modulation period of the first modulated waves being a first modulation period; a second processing unit for calculating a distance to the object in accordance with a beat signal, a frequency band of the second modulated waves being a second frequency band, and a modulation period of the second modulated waves being a second modulation period; and a calculation result determination unit for determining the distance and the relative speed to the object in accordance with calculation results of the first and second processing units.
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Patent Agency Ranking
公开(公告)号：US10809356B2
公开(公告)日：2020-10-20
申请号：US16086885
申请日：2017-03-23
Applicant: DENSO CORPORATION
Inventor： Takayuki Kitamura
Abstract: A learning selection unit selects execution of learning by a rapid learning unit at a learning moment if the number of times of learning is less than a number threshold value, and selects execution of learning by an accurate learning unit at the learning moment if the number of times of learning is greater than the number threshold value. The number of times of learning indicates how many times a learned value has been updated by the time learning at the learning moment is started.
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公开(公告)号：US11892557B2
公开(公告)日：2024-02-06
申请号：US17332440
申请日：2021-05-27
Applicant: DENSO CORPORATION
Inventor： Takayuki Kitamura
IPC: G01S7/292 , G01S13/12 , G01S13/931
CPC classification number: G01S7/2926 , G01S13/12 , G01S13/931
Abstract: The radar device includes a transmission section, a reception antenna section, a reception section, a frequency analysis section, a first correlation matrix generation section, and an averaging process section. The transmission section transmits a chirp at cycle periods, the number of the transmitted chirps being a repetition number. The first correlation matrix generation section generates, for the chirps, first correlation matrixes based on complex information on long-distance bins in distance spectra corresponding to respective reception antennas that have received the identical chirp. The averaging process section performs, for the respective long-distance bins, an averaging process for the repetition number of first correlation matrixes generated so as to correspond to the long-distance bins, to generate average correlation matrixes.
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公开(公告)号：US11275172B2
公开(公告)日：2022-03-15
申请号：US16084821
申请日：2017-03-15
Applicant: DENSO CORPORATION
Inventor： Takayuki Kitamura
Abstract: A target detection device includes an analysis section, a direction estimating section, a received waveform forming section, and a distance calculating section. The received waveform forming section forms a received waveform for each of the frequencies of the continuous waves by weighting beat signals corresponding to received waves received by each of receiving antennas, so as to have directivity in one of arrival directions estimated by the direction estimating section.
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公开(公告)号：US11125871B2
公开(公告)日：2021-09-21
申请号：US16996622
申请日：2020-08-18
Applicant: DENSO CORPORATION
Inventor： Takayuki Kitamura
IPC: G01S13/58 , G01S13/931 , G01S13/72 , G01S13/44 , G01S13/53 , G01S13/60 , G01S13/532 , G01S13/64 , G01S13/18
Abstract: In an azimuth estimation device, a center generation unit configured to generate, for each peak bin extracted by the extraction unit, a center matrix which is a correlation matrix obtained using values of the same peak bin collected from all of transmitting/receiving channels. A surrounding generation unit is configured to generate, for each of one or more surrounding bins of each of the peak bins, a surrounding matrix which is a correlation matrix obtained using values of the same surrounding bin collected from all of the transmitting/receiving channels. An integration unit is configured to generate, for each peak bin, an integrated matrix which is a correlation matrix obtained by weighting and adding the center matrix and the one or more surrounding matrices. An estimation unit is configured to execute an azimuth estimation calculation using the integrated matrix generated by the integration unit.
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公开(公告)号：US11047969B2
公开(公告)日：2021-06-29
申请号：US16716872
申请日：2019-12-17
Applicant: DENSO CORPORATION
Inventor： Naotsugu Shimizu , Takayuki Kitamura
IPC: G01S13/34 , G01S13/931 , G01S7/35 , G01S13/68
Abstract: A periphery monitoring radar device includes a transmission unit, a reception unit, a spectrum generation unit, an azimuth calculation unit, an environment determination unit, and a position calculation unit. The transmission unit transmits a combination of transmission signals modulated using a plurality of modulation modes. The environment determination unit determines whether a peripheral environment is a complex environment from the degree of randomness of a frequency spectrum for each modulation mode. The position calculation unit removes, upon the peripheral environment for at least one modulation mode being determined to be the complex environment, at least one azimuth corresponding to the at least one modulation mode from the azimuths respectively calculated for modulation modes to thereby obtain at least one target azimuth that is at least one of the remaining azimuths except for the removed azimuth; and calculates a position of the vehicle based on the at least one target azimuth.
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