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公开(公告)号：US20230016818A1
公开(公告)日：2023-01-19
申请号：US17947245
申请日：2022-09-19
Applicant: DENSO CORPORATION
Inventor： Takashi SAIKI
Abstract: A distance estimation device includes: a portable terminal; a communication device; a distance estimation unit estimating a distance between the portable terminal and the communication device; and a phase determination unit. The communication device determining a phase shift amount from a reference phase following a predetermined generating rule and generates measuring data by applying the determined phase shift amount. The phase determination unit determines a distance estimation phase for distance estimating purpose. The distance estimation unit adopts an estimated distance when a difference between the estimated distances respectively calculated based on at least two sets of combinations of the distance estimation phases is within a predetermined range.
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公开(公告)号：US20240257590A1
公开(公告)日：2024-08-01
申请号：US18631272
申请日：2024-04-10
Applicant: DENSO CORPORATION
Inventor： Kenichiro SANJI , Yohei NAKAKURA , Takashi SAIKI , Yasuhiro TANAKA
CPC classification number: G07C9/00309 , G06F21/31 , G07C2209/63
Abstract: A smart key and a mobile terminal store therein key information to be used for authentication with a vehicle to function as a key (key device) of a vehicle. Each of the smart key and the mobile terminal performs communication for authentication with an in-vehicle system or the like by BLE communication. For power saving, the smart key basically operates in a sleep mode in which the BLE communication is not possible. On receiving a wake signal periodically transmitted from the vehicle, the smart key transitions to a state where the BLE communication is possible. When sensing the presence of the mobile terminal within a predetermined distance from the vehicle, the in-vehicle system stops the periodic transmission of the wake signal.
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3.发明公开公开(公告)号：US20240336226A1
公开(公告)日：2024-10-10
申请号：US18747246
申请日：2024-06-18
Applicant: DENSO CORPORATION
Inventor： Takashi SAIKI , Yohei NAKAKURA , Kenichiro SANJI , Yasuhiro TANAKA
IPC: B60R25/24 , G01S13/84 , G07C9/00 , H04B17/318
CPC classification number: B60R25/245 , G01S13/84 , G07C9/00309 , H04B17/318 , B60R2325/205 , G07C2009/00793 , G07C2209/61 , G07C2209/63
Abstract: A position determination device includes at least one processor, a first communication device for transmitting a signal in a first frequency band, a second communication device for communicating with a vehicle mobile device using radio waves in a second frequency band different from the first frequency band. The at least one processor acquires first data indicating the reception state at the vehicle mobile device of a signal from the first communication device, acquires second data indicating the distance from the second communication device to the vehicle mobile device, and determines the location of the vehicle mobile device based on the acquired data.
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公开(公告)号：US20240255605A1
公开(公告)日：2024-08-01
申请号：US18631520
申请日：2024-04-10
Applicant: DENSO CORPORATION
Inventor： Kenichiro SANJI , Yohei NAKAKURA , Takashi SAIKI , Yasuhiro TANAKA
CPC classification number: G01S5/0295 , G01S5/012 , G01S5/0244
Abstract: A position determination system includes a microcomputer configured to: control operations of multiple outdoor units and an indoor unit; determine whether a portable device is present inside a vehicle interior or in an outdoor operation area; acquire a reception strength of a signal from the portable device in each indoor and outdoor units, acquire a time of flight (ToF) correlation value as a parameter different from the reception strength, change a type of the parameter used for position determination corresponding to an area for which the position determination is to be performed; determine whether the portable device is present inside the vehicle interior based on the reception strength observed in each outdoor unit and indoor unit, determine whether the portable device is present in the outdoor operation area based on the ToF correlation value.
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Patent Agency Ranking
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
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.
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公开(公告)号：US20230066445A1
公开(公告)日：2023-03-02
申请号：US17985255
申请日：2022-11-11
Applicant: DENSO CORPORATION
Inventor： Kenichirou SANJI , Takashi SAIKI
Abstract: A position estimation system includes: a position estimation unit configured to estimate a position of a mobile terminal based on a reception status of signals that are transmitted from the mobile terminal and received by a plurality of communication devices; a scene determination unit configured to determine, based on information from a sensor mounted in a vehicle, whether a current status is a simultaneous operation scene in which both a millimeter wave radar and a radar vicinity device are operable simultaneously; and an operating mode changing unit configured to change an operating mode of at least one of the millimeter wave radar, the communication device, or the position estimation unit in response to the scene determination unit determining that the current status is the simultaneous operation scene.
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公开(公告)号：US20230016580A1
公开(公告)日：2023-01-19
申请号：US17945400
申请日：2022-09-15
Applicant: DENSO CORPORATION
Inventor： Takashi SAIKI , Kenichirou SANJI
Abstract: A security system includes a portable terminal, a communication device communicating with the portable terminal, and a determination unit determining validity of the portable terminal. Phase data acquired from distance measuring radio wave is used to determine validity of communication between the portable terminal and the communication device. The received phase data of the distance measuring radio wave varies according to the distance from a transmission source. When the communication device and the portable terminal are fixed, and the communication device and the portable terminal have transmitted and received distance measuring radio waves having the same specific frequency, vehicle acquisition phase data and terminal acquisition phase data are the same. The determination unit determines, by using this two types of phase data, the validity of communication between the communication device and the portable terminal is determined.
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公开(公告)号：US20190147678A1
公开(公告)日：2019-05-16
申请号：US16097849
申请日：2017-04-12
Applicant: DENSO CORPORATION
Inventor： Takashi SAIKI , Hiromichi NAITO
CPC classification number: G07C9/00309 , B60R25/24 , B60R25/248 , E05B49/00 , G07C2009/00396 , G07C2009/00555 , H01Q1/3241 , H04Q9/00
Abstract: An in-vehicle system executes authentication of a mobile device multiple times from a parking state until an engine is started. The in-vehicle system operates in an alert mode when a vehicle is parked, and transmits an authentication signal including a strength change signal. When the in-vehicle system operates in an alert cancellation mode, the mobile device returns a response signal only when there is a change in the strength of the received authentication signal. When the in-vehicle system succeeds in authentication of the mobile device in an authentication process in the alert mode, the in-vehicle system shifts to the alert cancellation mode. When the in-vehicle system operates in the alert cancellation mode, the mobile device returns the response signal irrespective of whether there is the change in the strength of the received authentication signal.
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公开(公告)号：US20190016302A1
公开(公告)日：2019-01-17
申请号：US16068918
申请日：2016-12-16
Applicant: DENSO CORPORATION
Inventor： Takashi SAIKI , Ryusuke ISHIKAWA
IPC: B60R25/24
CPC classification number: B60R25/24 , E05B81/54 , G07C9/00309 , G07C2009/005 , G07C2209/63 , G08C17/02
Abstract: An electronic key system includes an on-board device and an electronic key for wireless communication. The on-board device includes: a pattern determining unit sequentially changes and determines a variation pattern of the electromagnetic wave intensity of a measurement signal; a request signal generating unit generating a request signal to which the measurement signal is added; and an LF transmitter sequentially transmitting the request signal so that the variation pattern of the electromagnetic wave intensity of the measurement signal in the request signal is changed by the pattern determining unit. The electronic key includes: an LF receiver receiving the request signal; a measurement unit sequentially measuring the variation pattern; and a key transmitter transmitting a response signal to the on-board device. The on-board device further includes: an on-board device receiver receiving the response signal; and a verifying section establishing verification of the electronic key.
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