公开(公告)号：US20210358236A1

公开(公告)日：2021-11-18

申请号：US17387443

申请日：2021-07-28

Applicant: DENSO CORPORATION

Inventor： Youhei SEKIYA ,  Kenichiro SANJI ,  Kazuhiro NAKASHIMA ,  Takashi SHINODA

IPC: G07C5/08 ,  G07C5/00 ,  H04B17/318 ,  H04W4/48

Abstract: A vehicular position estimation system estimates a portable terminal position with respect to a vehicle. Each of three or more in-vehicle communication devices is attached at a different position of the vehicle. Each of the multiple in-vehicle communication devices generates distance information indicating a distance from the in-vehicle communication device to the portable terminal. The vehicular position estimation system includes a position coordinate calculation portion that calculates a position coordinate of the portable terminal, and an area inside-outside determination portion that determines whether the portable terminal is inside the system actuation area.

公开(公告)号：US20180248583A1

公开(公告)日：2018-08-30

申请号：US15820495

申请日：2017-11-22

Applicant: SOKEN, INC. ,  DENSO CORPORATION

Inventor： Youhei SEKIYA ,  Hiroyuki MORI ,  Yoshifumi KAKU ,  Hironobu AKITA

IPC: H04B3/36 ,  H04B3/23 ,  H04B7/185 ,  B60R16/023

CPC classification number: H04B3/36 ,  B60R16/023 ,  H04B3/23 ,  H04B7/18584

Abstract: A relay device for data between communication cables having a signal line in full duplex communication, includes: communication units connected to the communication cables; and a main controller executing a relay process of the data. Each communication unit includes: an input/output unit of an analog signal; an analog/digital converter converting the analog signal into a digital signal; a generator generating another digital signal based on another analog signal input to another communication unit; and an echo canceller calculating a filter coefficient based on the other digital signal and the digital signal, and executing a cancellation process of removing a component derived from the other digital signal from the digital signal according to the filter coefficient. The communication unit or the main control unit includes a sign determination unit determining based on a time change of the filter coefficient whether a sign of disconnection exists in the signal line.

公开(公告)号：US20240088573A1

公开(公告)日：2024-03-14

申请号：US18513091

申请日：2023-11-17

Applicant: DENSO CORPORATION

Inventor： Youhei SEKIYA ,  Kenichiro SANJI ,  Takashi SAIKI

IPC: H01Q21/06 ,  H01Q1/32 ,  H01Q1/42

CPC classification number: H01Q21/062 ,  H01Q1/32 ,  H01Q1/42 ,  H01Q21/065

Abstract: A vehicle wireless device is used in a state being attached to an attachment surface of a vehicle. A circuit board includes a circuit that transmits or receives a radio wave at a predetermined target frequency. An antenna includes a board parallel portion parallel to the circuit board to receive a horizontally polarized wave having a vibration direction of an electric field parallel to the circuit board. A case accommodates the circuit board and the antenna. The circuit board faces the attachment surface when the vehicle wireless device is attached to the attachment surface. The circuit board may have a board region overlapping the board parallel portion without a conductor plate being provided in the board region. An inner space of the case may have a case region extending by λ/4 downward from the board parallel portion without a conductor plate being provided in the case region.

公开(公告)号：US20230336256A1

公开(公告)日：2023-10-19

申请号：US18336171

申请日：2023-06-16

Applicant: DENSO CORPORATION

Inventor： Youhei SEKIYA ,  Kenichiro SANJI ,  Yuuji KAKUYA

IPC: H04B17/318 ,  H04B17/21

CPC classification number: H04B17/318 ,  H04B17/221

Abstract: A vehicle unit installable and usable in a vehicle, includes, at least one vehicle antenna transmitting and receiving a high-frequency signal, which is a signal carried on a high-frequency radio wave, and the vehicle antenna includes, a vertically polarized wave antenna capable of transmitting and receiving a polarized wave orthogonal to a target surface, which is a metal surface at a predetermined part of the vehicle, and first and second horizontally polarized wave antennas each capable of transmitting and receiving polarized waves that are horizontal to the target surface and mutually orthogonally polarized.

公开(公告)号：US20200067546A1

公开(公告)日：2020-02-27

申请号：US16392814

申请日：2019-04-24

Applicant: SOKEN, INC. ,  DENSO CORPORATION

Inventor： Youhei SEKIYA ,  Hiroyuki MORI ,  Tomohisa KISHIGAMI

IPC: H04B1/10 ,  H03K5/1252 ,  H03K17/687 ,  H04B1/16

Abstract: An electronic control unit coupled to a transmission line of a differential signal includes: a first suppression circuit suppressing a ringing effect and decreasing an impedance of the line for a first time interval when a level of the differential signal changes; a second suppression circuits suppressing a ringing effect and decreasing the impedance of the line for a second time interval when the level of the differential signal changes; and a switching unit isolating the second suppression circuit from the line when the operation power source energizes the electronic control unit, and connecting the second suppression circuit to the line when the operation power source does not energize the electronic control unit.

公开(公告)号：US20190288680A1

公开(公告)日：2019-09-19

申请号：US16273810

申请日：2019-02-12

Applicant: SOKEN, INC. ,  DENSO CORPORATION

Inventor： Youhei SEKIYA ,  Hiroyuki MORI ,  Tomohisa KISHIGAMI

IPC: H03K17/16 ,  H04L25/02 ,  H04B3/42 ,  H03H11/24

Abstract: A ringing suppressor circuit is connected to a differential signal transmission line that includes a high potential signal line and low potential signal line pair for transmitting high and low level differential signals, and includes a ringing suppressor and a stopper. When the differential signal changes to a high level, the ringing suppressor suppresses ringing by lowering the impedance between the signal lines by turning ON of a switching element. When a differential signal voltage drops below a voltage lowering determination voltage, the stopper stops the impedance lowering function of the ringing suppressor by turning OFF another switching element.

公开(公告)号：US20230066781A1

公开(公告)日：2023-03-02

申请号：US17982254

申请日：2022-11-07

Applicant: DENSO CORPORATION

Inventor： Youhei SEKIYA ,  Yuzi SUGIMOTO ,  Masakazu IKEDA ,  Yuuji KAKUYA ,  Ryuichi ARAI ,  Shirou KOIDE ,  Takuya YAMASHITA ,  Hiroyuki IZUMI

IPC: H01Q9/04 ,  H01Q21/06

Abstract: An antenna device includes: a first antenna having a directional gain at a low elevation angle higher than the directional gain at a high elevation angle; a second antenna having the directional gain at the high elevation angle higher than the first antenna, transmitting and receiving a radio wave having a vibration direction of an electric field intersecting with a radio wave transmitted and received by the first antenna; and a third antenna having the directional gain at the high elevation angle higher than the first antenna, and transmitting and receiving a radio wave having a vibration direction of an electric field intersecting with the radio wave transmitted and received by the second antenna.

公开(公告)号：US20210356555A1

公开(公告)日：2021-11-18

申请号：US17387227

申请日：2021-07-28

Applicant: DENSO CORPORATION

Inventor： Kenichiro SANJI ,  Youhei SEKIYA ,  Takashi SHINODA ,  Kazuhiro NAKASHIMA

IPC: G01S5/14 ,  B60W40/08

Abstract: A vehicular position estimation system determines a portable terminal position by causing multiple in-vehicle communication devices placed at different positions on a vehicle to wirelessly communicate with a potable terminal, and includes: a distance index value acquisition portion that acquires a distance index value indicating a distance between the multiple in-vehicle communication devices; a normal range storage portion that stores data indicating a normal range of the distance index value; and a communication device diagnosis portion that determines whether the in-vehicle communication device is normal. When the distance index value between a diagnosis target device and at least one different device is in a normal range, the communication device diagnosis portion determines that a failure does not occur in the diagnosis target device.

公开(公告)号：US20170064623A1

公开(公告)日：2017-03-02

申请号：US15235324

申请日：2016-08-12

Applicant: DENSO CORPORATION ,  NIPPON SOKEN, INC.

Inventor： Youhei SEKIYA ,  Hiroyuki MORI ,  Yoshifumi KAKU ,  Shogo AKASAKI

IPC: H04W52/02 ,  H04B7/14

CPC classification number: H04W52/0206 ,  H04B3/36 ,  H04W52/0229 ,  Y02D70/00

Abstract: A relay device includes a communication signal relay unit for relaying a communication signal and a wake-up signal relay unit for relaying, by bypassing the communication signal relay unit, a wake-up signal that is transmitted using a frequency band which is lower than a communication frequency band used in transmitting the communication signal. The communication signal relay unit includes a low frequency wave attenuation unit for attenuating a signal with a frequency band lower than the communication frequency band. The wake-up signal relay unit includes a wake-up signal filter unit for passing through a signal with a frequency band lower than the communication frequency band.

Abstract translation: 中继装置包括用于中继通信信号的通信信号中继单元和用于通过旁路通信信号中继单元来中继的唤醒信号中继单元，使用低于1的频带发送的唤醒信号 通信频带用于发送通信信号。 通信信号中继单元包括用于衰减低于通信频带的频带的信号的低频波衰减单元。 唤醒信号中继单元包括用于通过低于通信频带的频带的信号的唤醒信号滤波器单元。

公开(公告)号：US20160306409A1

公开(公告)日：2016-10-20

申请号：US15098439

申请日：2016-04-14

Applicant: NIPPON SOKEN, INC. ,  DENSO CORPORATION

Inventor： Hiroyuki MORI ,  Youhei SEKIYA ,  Yoshifumi KAKU ,  Shogo AKASAKI

IPC: G06F1/32 ,  H04L27/20 ,  H04B1/04 ,  H04L27/12

CPC classification number: H04B1/04 ,  G06F1/3203 ,  H04L12/10 ,  H04L27/12 ,  H04W52/0216 ,  H04W52/0219 ,  H04W52/0229 ,  Y02D70/00

Abstract: A network control device includes a communicator performing communications via a transmission line at a preset transmission speed in a wake-up mode, a low frequency attenuator attenuating a low frequency component in a transmission signal having a low transmission speed that is lower than the preset transmission speed at a position between the transmission line and the communicator to receive and transmit the transmission signal to and from the communicator, and a wake-up controller receiving and transmitting a wake-up signal for transitioning from a sleep mode to the wake-up mode, at a transmission line side position of the low frequency attenuator, where the wake-up signal at a low frequency band is subject to attenuation by the low frequency attenuator, for a selective wake-up of a network node via the transmission line for network communications.

Abstract translation: 一种网络控制装置，包括以唤醒模式以预设的传输速度经由传输线进行通信的通信器，衰减低于预设传输速度的低传输速度的传输信号中的低频分量的低频衰减器 在传输线和通信器之间的位置处的速度接收并传送到通信器和从通信器发送传输信号，以及唤醒控制器接收并发送用于从休眠模式转换到唤醒模式的唤醒信号 在低频衰减器的传输线侧位置处，低频衰减器的低频衰减信号经由网络传输线选择性地唤醒网络节点， 通讯。