公开(公告)号：US11467125B2

公开(公告)日：2022-10-11

申请号：US17057285

申请日：2019-07-03

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Takayasu Matsushita ,  Kohei Suzuki

IPC: G01N27/419 ,  G01N27/406 ,  G01N27/416

Abstract: To provide a sensor control device capable of identifying a short circuit terminal with a simple configuration and whose identification operation is not easily affected by environmental conditions around the sensor. The sensor control device includes a short circuit detection unit that detects a short circuit of a sensor having a plurality of terminals, a resistance value control unit that increases a resistance value of an element between the terminals when the short circuit of the sensor is detected by the short circuit detection unit, and a short circuit terminal identification unit that identifies at which of the plurality of terminals a short circuit occurs when the resistance value control unit increases the resistance value of the element between the terminals to a set value or greater.

公开(公告)号：US10910815B2

公开(公告)日：2021-02-02

申请号：US16604909

申请日：2018-03-26

Applicant: Hitachi Automotive Systems, Ltd.

Inventor： Takayasu Matsushita ,  Yoshihisa Fujii

IPC: H02H3/00 ,  H02H1/00 ,  B60R16/02

Abstract: An electronic control unit having a self-diagnosis function is realized in which an operation processing section is capable of identifying not only the presence or absence of the occurrence of NG of disconnection, an earth fault, and a power fault, but also three states of NG, OK, and indetermination. Therefore, when a diagnosis opportunity is present, a mask signal maintains a state of Not Mask even if the mask signal is subsequently brought into a mask state. When an operation processing device requests a drive circuit for communication therewith, the mask signal is set to the state of Mask, and information stored in a register is cleared. Further, when the mask signal is in the state of Mask when the operation processing device performs communication with the drive circuit, the operation processing device is capable of identifying that an indeterminate state free of the opportunity of the diagnosis is present.