公开(公告)号：US20240201323A1

公开(公告)日：2024-06-20

申请号：US18590672

申请日：2024-02-28

Applicant: DENSO CORPORATION

Inventor： Yasuhiro KURONO ,  Yutaka HASEGAWA ,  Takuya TAKAYAMA

IPC: G01S7/35 ,  G01S13/42 ,  G01S13/58 ,  G01S13/931

CPC classification number: G01S7/354 ,  G01S13/42 ,  G01S13/584 ,  G01S13/931

Abstract: A vehicle radar apparatus detects a position and a velocity of a target object. The radar apparatus selects, as a relay reflection target object, a moving body capable of relaying transmission and reception of the radar wave to and from another target object, from target objects detected. The radar apparatus sets a multipath ghost condition indicating the position and the velocity of the target object erroneously detected as a result of a stationary object to which the radar wave is relayed by the relay reflection target object, based on the position and the velocity of the relay reflection target object and the velocity of an own vehicle. The radar apparatus extracts a target object that meets the multipath ghost condition from the detected target objects, determines that the extracted target object is a multipath ghost, and restricts output of a detection result from the radar apparatus to an external apparatus.

公开(公告)号：US20240192302A1

公开(公告)日：2024-06-13

申请号：US18584871

申请日：2024-02-22

Applicant: DENSO CORPORATION

Inventor： Yasuhiro KURONO ,  Takuya TAKAYAMA ,  Yutaka HASEGAWA

IPC: G01S3/48 ,  G01S7/40 ,  G01S13/931 ,  H04B7/0413

CPC classification number: G01S3/48 ,  G01S7/403 ,  H04B7/0413 ,  G01S13/931

Abstract: A radar system of one aspect of the present disclosure includes a plurality of transmitting antennas, a plurality of receiving antennas, an azimuth estimation unit, a restoration unit (S30), an error calculation unit, and a false azimuth determination unit. The azimuth estimation unit estimates an azimuth of a target based on a first received signal received by a virtual array. The restoration unit calculates a second received signal from an estimated power of the first received signal which corresponds to a signal restored from the first received signal, assuming that the transmitting azimuth is the same as an arrival azimuth. The false azimuth determination unit determines that the estimated azimuth is a false azimuth when the errors between the first received signal and the second received signal are larger than a determination threshold.

公开(公告)号：US20240201326A1

公开(公告)日：2024-06-20

申请号：US18594914

申请日：2024-03-04

Applicant: DENSO CORPORATION

Inventor： Yutaka HASEGAWA

IPC: G01S7/40 ,  G01S7/35 ,  G01S13/42

CPC classification number: G01S7/4047 ,  G01S7/354 ,  G01S13/42

Abstract: In a radar apparatus, a processing unit calculates a wavenumber of incoming waves reflected from a target object for each of detected target objects. The processing unit calculates, as a wavenumber evaluation value, a proportion of target objects of which the calculated wavenumber is plural among the all of the detected target objects. The processing unit calculates, as a false azimuth evaluation value, a proportion of target objects including a second incoming wave of which an azimuth difference relative to an azimuth of a first incoming wave of which power of the incoming wave is maximum power is a specific azimuth difference occurring due to periodic signal errors being superimposed on the virtual array, among the target objects of which the calculated wavenumber is plural. The processing unit determines contamination of the radome based on the wavenumber evaluation value and the false azimuth evaluation value.

公开(公告)号：US20220413132A1

公开(公告)日：2022-12-29

申请号：US17929240

申请日：2022-09-01

Applicant: DENSO CORPORATION

Inventor： Yutaka HASEGAWA

IPC: G01S13/931 ,  G01S7/40 ,  H01Q1/32 ,  G01S13/42

Abstract: A processing unit analyzes a reception signal to calculate, for every plurality of receiving antennas, a velocity spectrum in which a frequency is associated with a velocity at which the phase of the reception signal is changed at every cycle period. The processing unit extracts, as a group of identical object peaks, peaks that are generated on a velocity spectrum due to an identical object and that are identical in number to transmitting antennas. The processing unit determines, for each of the plurality of peaks constituting the group of identical object peaks, whether there is power variation among a plurality of the receiving antennas. The processing unit calculates an orientation of the object except for virtual receiving antennas included in a plurality of virtual receiving antennas and formed by the transmitting antennas corresponding to the peaks determined to involve the power variation.

公开(公告)号：US20240264297A1

公开(公告)日：2024-08-08

申请号：US18584868

申请日：2024-02-22

Applicant: DENSO CORPORATION

Inventor： Yasuhiro KURONO ,  Takuya TAKAYAMA ,  Yutaka HASEGAWA ,  Masatada HOKIGUCHI

IPC: G01S13/42 ,  G01S13/86 ,  G01S13/931

CPC classification number: G01S13/42 ,  G01S13/867 ,  G01S13/931

Abstract: A radar device according to one aspect of the present disclosure includes a plurality of transmitting antennas, a plurality of receiving antennas, a first azimuth estimation unit, a second azimuth estimation unit, and a selection unit. The first azimuth estimation unit estimates a first azimuth by coherently processing first received signals received by a virtual array. The second azimuth estimation unit estimates a second azimuth by, between transmissions or receptions, coherently processing second received signals received by an antenna array. The selection unit adopts the first azimuth or the second azimuth depending on the ambient environment and/or the detected situation of the target.

公开(公告)号：US20220276367A1

公开(公告)日：2022-09-01

申请号：US17662122

申请日：2022-05-05

Applicant: DENSO CORPORATION

Inventor： Yutaka HASEGAWA

IPC: G01S13/34 ,  G01S13/87 ,  G01S13/931

Abstract: A vehicle radar system according to one aspect of the present disclosure includes a first radar device, a second radar device, and a third radar device. The first radar device transmits a first radar wave for which a transmission period or a transmission frequency is different from transmission periods or transmission frequencies of a second radar wave to be transmitted from the second radar device and a third radar wave to be transmitted from the third radar device. The second radar device transmits the second radar wave for which transmission polarization or a transmission beam direction is different from transmission polarization or a transmission beam direction of the third radar wave to be transmitted from the third radar device.