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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.
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公开(公告)号：US20210105573A1
公开(公告)日：2021-04-08
申请号：US17123669
申请日：2020-12-16
Applicant: DENSO CORPORATION
Inventor： Shutaro TOKUNAGA , Takashi SAITOU , Tetsuya KUSUMOTO , Takashi SHINODA
Abstract: A mobile device position estimation system includes: an in-vehicle device that includes at least three in-vehicle antennas that transmits an electric wave; and a mobile device. The mobile device includes a reception intensity detection portion that detects a reception signal of the electric wave. The in-vehicle device or the mobile device includes a sensitivity error decision portion that decides a reception sensitivity error to cause multiple mobile device detection areas to be closest to a state where the multiple mobile device detection areas intersect at one point while deciding mobile device detection areas, an annular area decision portion that decides multiple annular areas where the mobile device exists, and a mobile device area estimation portion that estimates an overlapping area where the multiple annular areas overlap as a mobile device existence area.
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公开(公告)号：US20200233072A1
公开(公告)日：2020-07-23
申请号：US16843719
申请日：2020-04-08
Applicant: DENSO CORPORATION , SOKEN, INC.
Inventor： Hidenori OSAI , Kenichiro SANJI , Taichi YAMAGUCHI , Kazunari NAKAMURA , Munenori MATSUMOTO , Takashi SHINODA
Abstract: A position determination system a determines whether a mobile terminal is present outside a vehicle compartment based on a reception strength of a radio signal transmitted from the mobile terminal through a vehicle interior antenna and a reception strength of a radio signal transmitted from the mobile terminal through a vehicle exterior antenna, and the vehicle exterior antenna is configured to be disposed in a predetermined region in a vicinity of a window of a vehicle in an outer surface portion of a vehicle.
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Patent Agency Ranking
公开(公告)号：US20210181294A1
公开(公告)日：2021-06-17
申请号：US17168576
申请日：2021-02-05
Applicant: DENSO CORPORATION
Inventor： Tetsuya KUSUMOTO , Kenichiro SANJI , Takashi SHINODA
Abstract: In a portable device position estimation system, a vehicle-mounted system includes a transceiver and intercept devices. The vehicle-mounted system determines a first propagation time being a propagation time of a wireless signal from the transceiver to a portable device, based on a round trip time being a time between the transceiver transmitting a response request signal and the transceiver receiving a response signal from the portable device. The vehicle-mounted system determines a second propagation time being a propagation time of a wireless signal from the portable device to the intercept device based on the round trip time and a signal reception interval being a time between the intercept device receiving the response request signal and the intercept device receiving the response signal.
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公开(公告)号：US20210092704A1
公开(公告)日：2021-03-25
申请号：US17115532
申请日：2020-12-08
Applicant: DENSO CORPORATION
Inventor： Tetsuya KUSUMOTO , Takashi SAITOU , Takashi SHINODA
IPC: H04W64/00 , H04W24/10 , H04B17/318 , G01S11/06 , G01S5/00
Abstract: In a terminal position estimation system, a terminal position estimation apparatus, or a terminal position estimation method, an electric wave is received by a reception antenna of a communication terminal and is transmitted from multiple transmission antennas. A communication terminal position is estimated based on a magnetic field strength of the electric wave. When the communication terminal position is estimated, a position satisfying an approximate expression is estimated as the communication terminal position. The approximate expression shows a magnetic field strength distribution and is expressed by two variables of a distance from the multiple transmission antennas to the communication terminal and an angle between an axial direction of the multiple transmission antennas and a direction in which the communication terminal is positioned.
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公开(公告)号：US20210168563A1
公开(公告)日：2021-06-03
申请号：US17168522
申请日：2021-02-05
Applicant: DENSO CORPORATION
Inventor： Kenichiro SANJI , Taichi YAMAGUCHI , Kazunari NAKAMURA , Takashi SHINODA
Abstract: A position determination system determines a position of a mobile terminal relative to a vehicle by a wireless communication. The position determination system includes: a communication device disposed in a vehicle compartment and configured to receive a wireless signal transmitted from the mobile terminal and detect a reception strength of the received wireless signal. The position determination system is configured to: determine whether the mobile terminal is existing in the vehicle compartment; estimate an amount of absorbers that exists in the vehicle compartment and may absorb radio waves having a frequency used for the wireless communication; adjust an inside determination value which is used as a threshold for determining that the mobile terminal is existing in the vehicle compartment; and determine that the mobile terminal is existing in the vehicle compartment in response to the inside device strength being equal to or greater than the inside determination value.
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公开(公告)号：US20210016743A1
公开(公告)日：2021-01-21
申请号：US17063915
申请日：2020-10-06
Applicant: DENSO CORPORATION
Inventor： Tetsuya KUSUMOTO , Kenichiro SANJI , Takashi SHINODA
Abstract: A vehicle electronic key system includes a plurality of in-vehicle communication devices and an authentication device. Each of the plurality of in-vehicle communication devices communicates wirelessly with another in-vehicle communication device, and based on a signal transmitted from the another in-vehicle communication device, generate distance-related information that directly or indirectly indicates a distance to the another in-vehicle communication device. The authentication device specify a plurality of inter-communication device distances based on the distance-related information generated by the plurality of in-vehicle communication devices, and does not execute a vehicle control when at least one of the plurality of inter-communication device distances deviates from a predetermined normal range.
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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
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.
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