公开(公告)号：US12216203B2

公开(公告)日：2025-02-04

申请号：US18326765

申请日：2023-05-31

Applicant: DENSO CORPORATION

Inventor： Yu Koyama ,  Kohei Kozuki

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

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：US12044808B2

公开(公告)日：2024-07-23

申请号：US17932955

申请日：2022-09-16

Applicant: DENSO CORPORATION

Inventor： Masayoshi Satake ,  Dai Kondou ,  Haruka Aoshima ,  Kenji Fukabori ,  Kohei Kozuki

IPC: G01S7/521 ,  G01S15/32 ,  G01S15/931

CPC classification number: G01S7/521 ,  G01S15/32 ,  G01S15/931 ,  G01S2015/938 ,  G01S2015/939

Abstract: An ultrasonic transducer includes a transducer case and an ultrasonic element. The transducer case is formed into a bottomed, cylindrical shape having a side plate portion and a bottom plate portion that seals one end side of the side plate portion in an axial direction to configure a diaphragm. The ultrasonic element is fixedly supported to the bottom plate portion to face an interior space surrounded by the side plate portion and the bottom plate portion. The ultrasonic element is arranged in a position being offset in an in-plane direction orthogonal to the axial direction relative to a center position of the diaphragm in the in-plane direction to be capable of generating a first transmission wave having first directivity characteristics and a second transmission wave having second directivity characteristics that are directivity characteristics differing from the first directivity characteristics and in which sound pressure in the axial direction is decreased.