公开(公告)号：US20250164285A1

公开(公告)日：2025-05-22

申请号：US19035414

申请日：2025-01-23

Applicant: DENSO CORPORATION

Inventor： HIDEKI KABUNE ,  TOSHIHIRO FUJITA ,  NAO UEMATSU

IPC: G01D5/14

Abstract: A sensor device remains partially operational using battery power when the starting switch is off. It includes a sensor input processor with a sensor element that detects changes in physical quantities due to the movement of a detection target. An input processing circuit calculates sensor information based on these detected values. The device also has a memory that stores abnormality information, including power failure data when battery power is not supplied during the switch-off period. A voltage holding circuit on the battery feed line powers the sensor input processor without passing through the starting switch, maintaining sufficient voltage to retain data in memory during temporary battery voltage drops. Additionally, the sensor input processor includes an adjustment circuit that sequentially stops functions other than data retention based on the voltage of the voltage holding circuit when it drops.

公开(公告)号：US20230079227A1

公开(公告)日：2023-03-16

申请号：US18053695

申请日：2022-11-08

Applicant: DENSO CORPORATION

Inventor： TAKASHI SUZUKI ,  HIDEKI KABUNE ,  TOSHIHIRO FUJITA ,  KUNIHIKO MATSUDA ,  HARUKI AMANO

IPC: B62D5/04

Abstract: A first circuit energizes a steering assist actuator to electrically assist steering of a driver. A second circuit is provided in a same housing as the first circuit and energizes a positional actuator to move a steering position. A controller operates the first and second circuits to control operations of the steering assist actuator and the positional actuator. The controller changes a priority between the first circuit and the second circuit in a start period, in which the steering control device is started, a normal operation period, in which the steering control device is operated normally, and a stop period, in which the steering control device is stopped. The priority includes at least one of an order of operating the first circuit and the second circuit, output allocation between the first circuit and the second circuit, and output magnitude between the first circuit and the second circuit.

公开(公告)号：US20240240930A1

公开(公告)日：2024-07-18

申请号：US18620689

申请日：2024-03-28

Applicant: DENSO CORPORATION

Inventor： TOSHIHIRO FUJITA ,  NAO UEMATSU

IPC: G01B7/30

CPC classification number: G01B7/30

Abstract: A sensor of a detection device includes at least one main detection element, at least one sub detection element, a main digital conversion part that digitally converts a detection signal of the main detection element, and a calculation unit that calculates a state information using the digitally converted detection signal of the main detection element. The sensor outputs a digital signal having a state information and an analog signal according to the detection signal of the sub detection elements. A control unit includes a sub digital conversion part that converts an analog signal into digital, and an abnormality detection part that performs an abnormality detection using a main information and a sub information. The abnormality detection part performs an abnormality detection using a value obtained by converting an analog signal into state information as sub information, or a value obtained by converting state information into analog output as main information.

公开(公告)号：US20240240929A1

公开(公告)日：2024-07-18

申请号：US18620680

申请日：2024-03-28

Applicant: DENSO CORPORATION

Inventor： NAO UEMATSU ,  TOSHIHIRO FUJITA

IPC: G01B7/30

CPC classification number: G01B7/30

Abstract: A detection device includes a sensor and a control unit. The sensor includes at least one main detection element configured to detect a change in a physical quantity of a detection target, at least one sub detection element configured to detect a change in a physical quantity of the detection target, and a signal processing section configured to process a detection signal of the main detection element. The control unit acquires a signal from the sensor according to a change in the physical quantity of the detection target. The sensor outputs to the control unit a digital signal containing information corresponds to a detection value of the main detection element and an analog signal that corresponds to a detection value of the sub detection element.

公开(公告)号：US20220349697A1

公开(公告)日：2022-11-03

申请号：US17813522

申请日：2022-07-19

Applicant: DENSO CORPORATION

Inventor： ASUKA TANAKA ,  TOSHIHIRO FUJITA ,  JUN MORIMOTO

IPC: G01B7/30 ,  H01F7/02 ,  F16M13/02

Abstract: A magnet holder is used in a rotational angle sensing device and is shaped in a tubular form while the magnet holder is configured to hold a magnet opposed to a magnetic sensor and is also configured to be securely press-fitted to a rotatable body. The magnet holder includes: a magnet holding portion that is located at one side of the magnet holder in an axial direction; a press-fitting fixation portion that is located at another side of the magnet holder in the axial direction; and a connecting portion that connects between the magnet holding portion and the press-fitting fixation portion. An outer diameter of the press-fitting fixation portion is different from an outer diameter of the magnet holding portion, and a wall thickness of the press-fitting fixation portion is different from a wall thickness of the magnet holding portion.

公开(公告)号：US20250166433A1

公开(公告)日：2025-05-22

申请号：US19029428

申请日：2025-01-17

Applicant: DENSO CORPORATION

Inventor： NAO UEMATSU ,  TOSHIHIRO FUJITA ,  HIDEKI KABUNE

IPC: G07C5/08 ,  G01B7/30 ,  G01D5/16

Abstract: A sensor device has a sensor unit and a controller. The sensor unit operates partially using battery power through a power supply line when the starting switch is off. The sensor device includes a sensing element that detects changes in physical quantities and a determination circuit that identifies power failures when power is not supplied from the power supply line. The sensor unit also has a communication unit that transmits sensor information, including power failure status. The controller, powered through the starting switch, receives this information, transmits return signals to reset power failure information, performs control operations using the sensor data, and stores power failure information in a non-volatile memory.

公开(公告)号：US20220410966A1

公开(公告)日：2022-12-29

申请号：US17823394

申请日：2022-08-30

Applicant: DENSO CORPORATION

Inventor： TOSHIHIRO FUJITA

IPC: B62D6/00 ,  B62D15/02 ,  B62D5/04 ,  G01B7/30

Abstract: A position detection device includes a first positional sensor mounted on a reference portion, and a second positional sensor mounted on a detection target that is movable relative to the reference portion. A controller calculates a position of the detection target based on a detection value of the first positional sensor and a detection value of the second positional sensor. The position detection device may be applied to a steer-by-wire system for a vehicle. The reference portion may be a fixed portion of the vehicle, and the detection target may be a steering wheel or a vehicle wheel of the vehicle. The controller may calculate a steering angle of the steering wheel or a turning angle of the vehicle wheel as the position of the detection target.

公开(公告)号：US20220247283A1

公开(公告)日：2022-08-04

申请号：US17660001

申请日：2022-04-20

Applicant: DENSO CORPORATION

Inventor： SYUHEI MIYACHI ,  ATSUSHI SAITOU ,  TOSHIHIRO FUJITA ,  NOBORU NAGASE

IPC: H02K11/33 ,  H05K1/18 ,  H02K9/22

Abstract: An electronic device includes: a wiring board; an electric connection wiring connected to a power supply; motor connection wirings arranged on a peripheral side of the wiring board and connected to the electric motor; and semiconductor modules having semiconductor elements and a resin mold. The semiconductor modules are arranged at a position on the electric connection wiring or on the peripheral side of the electric connection wiring and on a center side of the motor connection wiring. At least a part of electrodes of the plurality of semiconductor modules is mounted on the electric connection wiring.

公开(公告)号：US20250076024A1

公开(公告)日：2025-03-06

申请号：US18949529

申请日：2024-11-15

Applicant: DENSO CORPORATION

Inventor： NAO UEMATSU ,  TOSHIHIRO FUJITA

IPC: G01B7/30 ,  B62D15/02 ,  G01D5/14

Abstract: A rotation angle sensor has at least three detection elements for detecting a change in a physical quantity corresponding to a rotation position of a detection target, outputs rotation number information of the detection target corresponding to a detection value of at least one of the detection elements, and outputs rotation angle information of the detection target corresponding to the detection values of each of the detection elements as at least one analog signal and at least one digital signal. A control unit has an absolute angle calculation part and an abnormality determination part. The absolute angle calculation part outputs to a control calculation portion an absolute angle calculated using either the analog rotation angle, which is a rotation angle based on an analog signal, or the digital rotation angle, which is a rotation angle based on a digital signal, that is determined to be normal.

公开(公告)号：US20240007105A1

公开(公告)日：2024-01-04

申请号：US18467716

申请日：2023-09-14

Applicant: DENSO CORPORATION

Inventor： TOSHIHIRO FUJITA ,  ATSUSHI SAITO ,  NOBORU NAGASE

IPC: H03K17/687 ,  H02K11/33 ,  H02K9/22

CPC classification number: H03K17/6871 ,  H02K11/33 ,  H02K9/227 ,  B62D5/0406

Abstract: A semiconductor module includes a switching element, a sealing portion, a drain terminal, a source terminal, and a gate terminal. The drain terminal is connected to a drain of the switching element. The source terminal is connected to a source of the switching element. The gate terminal is connected to a gate of the switching element. The sealing portion has a rectangular shape in a plan view, and molds the switching element. Each of the drain terminal, the source terminal, and the gate terminal is exposed from the sealing portion on a short side of the rectangle.