公开(公告)号：US20210203321A1

公开(公告)日：2021-07-01

申请号：US17203388

申请日：2021-03-16

Applicant: DENSO CORPORATION

Inventor： Yuichiro NAKANO ,  Yohei NAKAKURA

IPC: H03K17/687 ,  H02M1/08 ,  H03K17/081 ,  G01R19/165

Abstract: A circuit fault detection apparatus includes an AD conversion circuit, a corrector, first and second determination devices, and a fault detector. The AD conversion circuit detects a voltage corresponding to a current or a voltage applied to the circuit fault detection element, and converts the voltage to a digital value. The corrector corrects a measurement value to a corrected measurement value. The first determination device determines whether or not the electric circuit has the fault, based on a comparison between an uncorrected measurement value and an uncorrected threshold value. The second determination device determines whether the electric circuit has the fault, based on a comparison between the corrected measurement value and a corrected threshold value. The fault detector detects the fault in the electric circuit, based on a condition that at least one of the first or second determination devices determines that the electric circuit has the fault.

公开(公告)号：US20210208195A1

公开(公告)日：2021-07-08

申请号：US17203453

申请日：2021-03-16

Applicant: DENSO CORPORATION

Inventor： Yuichiro NAKANO ,  Yohei NAKAKURA

IPC: G01R31/28 ,  G01R19/165

Abstract: A circuit fault detection apparatus includes an AD conversion circuit, a corrector, a threshold value setting device and a fault detector. The AD conversion circuit detects a voltage corresponding to a current flowing through a circuit fault detection element connected to the electric circuit or a voltage applied to the circuit fault detection element, and converts the voltage to a digital value. The corrector corrects the digital value or a measurement value as a voltage value representative of the digital value to a corrected measurement value. The threshold value setting device sets a threshold value closer to a normal value side than a limit value of the corrected measurement value determined based on a convertible range of the AD conversion circuit. The fault detector detects whether the fault occurs in the electric circuit, based on comparison between the threshold value and the corrected measurement value.

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.

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

IPC: G01S5/02 ,  G01S5/00

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.

公开(公告)号：US20240322437A1

公开(公告)日：2024-09-26

申请号：US18734616

申请日：2024-06-05

Applicant: DENSO CORPORATION

Inventor： Tatsuya INAGAKI ,  Yuuji KAKUYA ,  Yohei NAKAKURA

IPC: H01Q9/04 ,  G01S13/32 ,  H01Q1/22

CPC classification number: H01Q9/0421 ,  G01S13/32 ,  H01Q1/22 ,  H01Q9/045

Abstract: A conductive pattern, as an antenna, includes: a radiating element formed in an inverted F shape; and a feeding element for indirectly feeding power to the radiating element. The radiating element includes a main body, a short circuit part, and a powered part. The main body is a member longer than the short circuit part and the powered part. The short circuit part is connected to the main body at right angle at one end of the main body. The powered part extends from a middle of the main body in a direction perpendicular to the main body so as to have a predetermined distance from, for example, the short circuit part. The feeding element is formed to face the powered part below the powered part.

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

IPC: G07C9/00 ,  G06F21/31

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.

公开(公告)号：US20200282954A1

公开(公告)日：2020-09-10

申请号：US16883265

申请日：2020-05-26

Applicant: DENSO CORPORATION

Inventor： Yuichiro NAKANO ,  Yohei NAKAKURA

IPC: B60R25/24 ,  H01Q23/00 ,  H04B1/04

Abstract: An antenna driving apparatus drives an antenna by applying to the antenna a drive voltage having a rectangular waveform switching between a high voltage value and a low voltage value in a predetermined cycle. The antenna driving apparatus includes a high-voltage side switch, a low-voltage side switch, a duty ratio acquisition unit, a drive voltage application unit and a duty ratio switching unit. The duty ratio acquisition unit acquires a set value of a duty ratio as a time ratio at which the drive voltage is at the high voltage value in the rectangular waveform. The drive voltage application unit applies to the antenna the drive voltage by repeating execution of turning the high-voltage side switch into the nonconductive state. The duty ratio switching unit alternately executes switching of the duty ratio between a first duty ratio and a second duty ratio.