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：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：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：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.