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公开(公告)号：US11208074B2
公开(公告)日：2021-12-28
申请号：US17063915
申请日：2020-10-06
申请人： DENSO CORPORATION
摘要： 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：US11388556B2
公开(公告)日：2022-07-12
申请号：US17168522
申请日：2021-02-05
申请人： DENSO CORPORATION
摘要： 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：US11630194B2
公开(公告)日：2023-04-18
申请号：US16843719
申请日：2020-04-08
申请人： DENSO CORPORATION , SOKEN, INC.
发明人： Hidenori Osai , Kenichiro Sanji , Taichi Yamaguchi , Kazunari Nakamura , Munenori Matsumoto , Takashi Shinoda
摘要： 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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公开(公告)号：US11425679B2
公开(公告)日：2022-08-23
申请号：US17115532
申请日：2020-12-08
申请人： DENSO CORPORATION
IPC分类号： H04W64/00 , H04B17/318 , G01S5/00 , G01S11/06 , H04W24/10
摘要： 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：US11320513B2
公开(公告)日：2022-05-03
申请号：US17168576
申请日：2021-02-05
申请人： DENSO CORPORATION
摘要： 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：US11202165B2
公开(公告)日：2021-12-14
申请号：US17123669
申请日：2020-12-16
申请人： DENSO CORPORATION
摘要： 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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