公开(公告)号：US20240393407A1

公开(公告)日：2024-11-28

申请号：US18667414

申请日：2024-05-17

Applicant: Robert Bosch GmbH

Inventor： Xiaofei Qiu ,  Jin Li ,  Ruediger Karner

IPC: G01R31/52 ,  G01R19/10

Abstract: A method and device for the detection of short to ground circuits is disclosed. The method includes (i) connecting to a detection current source that is linked to the high-side lead terminal of the two lead terminals of an electronic control circuit, (ii) disconnecting the low-side switch of the ground terminal of the electronic control circuit, (iii) measuring the voltage of the two lead terminals of the electronic control circuit separately, and (iv) determining whether the high-side lead terminal or the low-side lead terminal of the two lead terminals has a short to ground circuit by comparing the voltages of the two lead terminals. When the voltage of the high-side lead terminal is greater than the voltage of the low-side lead terminal, it is determined that the low-side lead terminal has a short to ground circuit. When the voltage of the high-side lead terminal is equal to the voltage of the low-side lead terminal, it is determined that the high-side lead terminal has a short to ground circuit.

公开(公告)号：US20240067116A1

公开(公告)日：2024-02-29

申请号：US18259553

申请日：2022-01-03

Applicant: Robert Bosch GmbH

Inventor： Xiaofei Qiu

IPC: B60R21/017 ,  B60R21/0136 ,  H02J7/00 ,  H02J7/34

CPC classification number: B60R21/017 ,  B60R21/0136 ,  H02J7/0032 ,  H02J7/00712 ,  H02J7/345 ,  B60R2021/01286

Abstract: A capacitor charging circuit, comprising: a charging power supply, for outputting a charging voltage; a voltage comparison module, connected to the charging power supply, and configured to output a drive signal indicating charging upon judging that the charging voltage is higher than a preset threshold; a current adjustment module, connected to the voltage comparison module and the charging power supply separately, the charging current adjustment module receiving the drive signal and, upon receiving the drive signal indicating charging, causing the charging power supply to charge the capacitor with a maximum charging current. The present application enables adjustment of the charging current of the charging capacitor according to the power supply voltage, thus increasing the charging speed.

公开(公告)号：US20240067115A1

公开(公告)日：2024-02-29

申请号：US18259183

申请日：2021-11-11

Applicant: Robert Bosch GmbH

Inventor： Xiaofei Qiu

IPC: B60R21/017 ,  B60R21/26

CPC classification number: B60R21/017 ,  B60R21/26 ,  B60R2021/01184

Abstract: A control circuit includes (i) at least one voltage output end, each said voltage output end being connected to a filter capacitor, (ii) at least one detection circuit disposed in the control circuit, each said detection circuit being connected to one said voltage output end, and (iii) a fault output apparatus which is configured to, when the detection circuit detects that a fault has occurred in the filter capacitor connected to the voltage output end, output corresponding filter capacitor fault indication information. The power supply output apparatus has no need for a redundant capacitor design, and can determine whether a fault has occurred in the filter capacitor on the basis of the duration of charging of the filter capacitor thus ensuring the reliability and stability of the power supply output apparatus.

公开(公告)号：US20230347844A1

公开(公告)日：2023-11-02

申请号：US18307428

申请日：2023-04-26

Applicant: Robert Bosch GmbH

Inventor： Ruediger Karner ,  Xiaofei Qiu

IPC: B60R21/01

CPC classification number: B60R21/01 ,  B60R2021/01184

Abstract: An ignition resistance test circuit for an airbag is disclosed. The test circuit includes (i) an ignition resistor, (ii) a current source circuit for providing a test current for testing the ignition resistor, (iii) a current drain circuit for receiving the test current, (iv) a differential amplification circuit for differentially amplifying the voltage at the two ends of the ignition resistor, thus obtaining a voltage drop after differential amplification, and (v) an analogue-to-digital conversion circuit for performing analogue-to-digital conversion of the differentially amplified voltage drop to provide to a control unit, enabling the control unit to determine the resistance value of the ignition resistor based on the voltage drop and the test current. An airbag controller and an airbag is also disclosed.