公开(公告)号：US20230358884A1

公开(公告)日：2023-11-09

申请号：US18357001

申请日：2023-07-21

Applicant: DENSO CORPORATION

Inventor： Sakiko NISHINO ,  Yu KOYAMA ,  Takuya NOMURA

IPC: G01S7/526 ,  G01S15/04 ,  G01S7/524

CPC classification number: G01S15/04 ,  G01S7/524 ,  G01S7/526 ,  G01S2015/932

Abstract: An object detection device for detecting an object by transmitting and receiving ultrasonic waves, includes a transmitter that transmits an ultrasonic wave, two or more receivers, each of which receives an ultrasonic wave and outputs an reception signal according to the received ultrasonic wave, a comparator that compares the plurality of reception signals output from the two or more receivers and calculates a degree of similarity between the plurality of reception signals, and a determiner that makes a determination as to whether there is an object to be detected, based on the degree of similarity.

公开(公告)号：US20200256968A1

公开(公告)日：2020-08-13

申请号：US16865003

申请日：2020-05-01

Applicant: DENSO CORPORATION

Inventor： Yu KOYAMA ,  Tetsuya AOYAMA ,  Takuya NOMURA ,  Satoru NORO

IPC: G01S7/521 ,  B06B1/06 ,  G01S7/523 ,  G10K9/122 ,  G01S15/02

Abstract: An ultrasonic sensor includes: a first electrode that is provided in an ultrasonic microphone including a vibration element having a function of performing conversion between mechanical vibration and an electrical signal; a second electrode that is provided at a position different from the first electrode in an in-plane direction intersecting a directional axis of the ultrasonic microphone; and a detection section that is provided to detect the presence or absence of attached matter attached to the ultrasonic sensor on the basis of a change in capacitance between the first electrode and the second electrode.

公开(公告)号：US20190204428A1

公开(公告)日：2019-07-04

申请号：US16332531

申请日：2017-08-03

Applicant: DENSO CORPORATION

Inventor： Taketo HARADA ,  Mitsuyasu MATSUURA ,  Yu KOYAMA

IPC: G01S7/52 ,  G01S15/87 ,  G01S15/93 ,  G01S7/526 ,  B60Q5/00

CPC classification number: G01S7/52004 ,  B60Q5/005 ,  G01S7/526 ,  G01S15/87 ,  G01S15/93 ,  G01S15/931 ,  G01S2007/52009 ,  G01S2015/938

Abstract: An ECU of an object detection device stops transmission of search waves from a plurality of ultrasonic sensors when a vehicle travels at a predetermined speed or more, and counts the frequency of receiving waves with an intensity of not less than a threshold intensity for each of the plurality of ultrasonic sensors. The ECU acquires a first count that is a count of the frequency in a first sensor that is one of the plurality of ultrasonic sensors, and a second count that is a count of the frequency in a second sensor different from the first sensor. The ECU determines that snow accretion has occurred on the first sensor if the first count is smaller than the second count, and a difference between the first count and a representative value that is set based on the second count is not less than a predetermined value.

公开(公告)号：US20240036195A1

公开(公告)日：2024-02-01

申请号：US18450248

申请日：2023-08-15

Applicant: DENSO CORPORATION

Inventor： Yu KOYAMA ,  Tetsuya AOYAMA

IPC: G01S15/931 ,  G01S7/534

CPC classification number: G01S15/931 ,  G01S7/534

Abstract: An object detection device includes a drive signal generator that generates a drive signal including frequency modulation, a first correlation filter that performs correlation detection between the reception signal and a first reference signal corresponding to the drive signal, a first determiner that determines, based on the correlation signal from the first correlation filter, whether the reception signal is a reflected wave of the probe wave transmitted from the transmitter, a second correlation filter that performs correlation detection between the reception signal and a second reference signal corresponding to a portion of the drive signal, a third correlation filter that performs correlation detection between the reception signal and a third reference signal corresponding to another portion of the drive signal having higher frequencies than the second reference signal, and a second determiner that determines whether there is an object within a detection region based on correlation signals from the second and third correlation filters.

公开(公告)号：US20220308211A1

公开(公告)日：2022-09-29

申请号：US17807305

申请日：2022-06-16

Applicant: DENSO CORPORATION

Inventor： Yu KOYAMA ,  Satoru NORO ,  Tetsuya AOYAMA

IPC: G01S15/931 ,  G01S7/52

Abstract: An object detection apparatus detects an object in a vicinity of a moving body in a state of being mounted to the moving body. The object detection apparatus measures a reverberation frequency that is a frequency of a reverberation signal that is generated in a transceiver that externally transmits a transmission wave that is an ultrasonic wave and receives a reception wave that includes a reflected wave of the transmission wave from the object. The object detection apparatus detects a specific segment that is an occurrence segment in which occurrence of beat that is attributed to a plurality of reverberation frequency components is confirmed in the reverberation signal, or a non-occurrence segment in which the occurrence of beat does not significantly occur. The object detection apparatus sets a measurement segment in which the reverberation frequency is measured in the non-occurrence segment based on a detection result of the specific segment.

公开(公告)号：US20210311189A1

公开(公告)日：2021-10-07

申请号：US17349603

申请日：2021-06-16

Applicant: DENSO CORPORATION

Inventor： Yohei SUZUKI ,  Yu KOYAMA ,  Mitsuyasu MATSUURA ,  Satoru NORO ,  Tetsuya AOYAMA ,  Hideki OTSUKA

IPC: G01S15/931 ,  G01S15/10 ,  G01S7/523

Abstract: An object detecting apparatus is configured to detect a surrounding object. The object detecting apparatus is provided with a driving signal generation unit provided to generate a driving signal that drives a transmitter unit including a transmitter emitting transmission waves externally; and a control unit provided to control an output of the driving signal transmitted to the transmitter unit from the driving signal generation unit. The driving signal generation unit is configured to generate the driving signal of which the frequency changes stepwise.

公开(公告)号：US20200264302A1

公开(公告)日：2020-08-20

申请号：US16867421

申请日：2020-05-05

Applicant: DENSO CORPORATION

Inventor： Tetsuya AOYAMA ,  Yu KOYAMA ,  Satoru NORO

IPC: G01S15/04 ,  H04B11/00 ,  G08G1/16 ,  G01S15/931

Abstract: A transmission/reception control device is configured to control transmission and reception in an ultrasonic sensor. The ultrasonic sensor includes an ultrasonic transducer. The ultrasonic transducer is configured to transmit a probe wave as an ultrasonic wave and receive a reception wave. The reception wave includes a reflected wave of the probe wave. The transmission/reception control device includes a transmission frequency setting unit, a reception signal processing unit, and an object detection unit. The transmission frequency setting unit sets a frequency of the probe wave to a transmission frequency different from a resonance frequency of the ultrasonic transducer. The reception signal processing unit processes a reception result of the reception wave based on the probe wave transmitted with the transmission frequency. The object detection unit detects the object based on a result of processing by the reception signal processing unit.

公开(公告)号：US20250147161A1

公开(公告)日：2025-05-08

申请号：US19018655

申请日：2025-01-13

Applicant: DENSO CORPORATION

Inventor： Sakiko UESAKA ,  Yu KOYAMA ,  Tetsuya AOYAMA ,  Takuya NOMURA

IPC: G01S7/539 ,  G01S7/53 ,  G01S15/931

Abstract: An object detection apparatus includes: a reception unit that acquires a reception signal corresponding to a reflected wave from the object of a transmission wave; and an information processing unit that acquires object information related to a shape of the object from a learning model by inputting a feature quantity and other measurement information of a waveform of the reception signal to the learned learning model in which machine learning to estimate the shape of an object has been performed. The learning model extracts, as temporal feature data, changes over time in a feature element in the reception signal based on the reception signal and a feature pattern of the object prescribed in advance, compresses the temporal feature data and acquires a plurality of feature quantities, and determines the shape of the object by calculating the plurality of feature quantities and the measurement information while weighting with a predetermined weight.

公开(公告)号：US20230305143A1

公开(公告)日：2023-09-28

申请号：US18326765

申请日：2023-05-31

Applicant: DENSO CORPORATION

Inventor： Yu KOYAMA ,  Kohei KOZUKI

IPC: G01S15/04 ,  G01S15/931 ,  G01S7/52

CPC classification number: G01S15/04 ,  G01S15/931 ,  G01S7/52004

Abstract: An object detection device includes a transceiver that transmits ultrasonic waves encoded with frequency modulation and receives an ultrasonic wave and outputs a reception signal, a first quadrature detector that generates and outputs a complex reception signal based on quadrature detection of the reception signal, a second quadrature detector that generates and outputs a complex reference signal based on quadrature detection of the reference signal, a correlation filter that performs correlation detection between the complex reception signal and the complex reference signal and outputs a correlation signal, and a code determiner that determines a code included in the reception signal based on the correlation signal.

公开(公告)号：US20220317291A1

公开(公告)日：2022-10-06

申请号：US17807492

申请日：2022-06-17

Applicant: DENSO CORPORATION

Inventor： Yu KOYAMA ,  Tetsuya AOYAMA

IPC: G01S15/10 ,  G01S7/524 ,  G01S7/52

Abstract: An object detection apparatus detects an object in a vicinity of a moving body in a state of being mounted to the moving body. The object detection apparatus measures a reverberation frequency that is a frequency of a reverberation signal that is generated in a transceiver that externally transmits a transmission wave that is an ultrasonic wave and receives a reception wave that includes a reflected wave of the transmission wave from the object. object detection apparatus detects the object based on the reception wave. The object detection apparatus sets at least one of a transmission characteristic and a reception characteristic in the transceiver. The object detection apparatus sets at least one of transmission characteristics of the transmission wave and/or sets circuit characteristics in the transceiver. The object detection apparatus reduces at least one of the transmission characteristic and the reception characteristic during measurement of the reverberation frequency.