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Title:
ELECTRONIC CONTROL DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/202824
Kind Code:
A1
Abstract:
The present invention realizes an electronic control device that, without causing the processing load of an external recognition microcomputer to increase, causes other microcomputers to monitor the computation processing load of the external recognition microcomputer and transfers control to a control microcomputer for degeneration before the external recognition microcomputer is overloaded, making it possible to improve safety. A computation processing unit 1e of an external recognition microcomputer 1a conveys the start of computation to an output control unit 1f when starting a computation process and conveys the end of computation when the computation process is terminated. The output control unit 1f changes the voltage of an output signal 1m in order to indicate the start and the end of computation by the computation processing unit 1e. A load state detection unit 1g of a control microcomputer 1b detects a change in the voltage of the signal 1m from the output control unit 1f, calculates a voltage change time T1, and conveys the voltage change time T1 to an overload determination unit 1h. The overload determination unit 1h compares the voltage change time T1 and a prescribed value T' and, when it is determined that the computation processing unit 1e is overloaded, notifies a control microcomputer 2a for degeneration about the state of being overloaded via a communication circuit 1c.

Inventors:
TANAKA Daisuke (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
SAKAMOTO Hideyuki (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2019/004570
Publication Date:
October 24, 2019
Filing Date:
February 08, 2019
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
G06F11/07; B60R16/02; B60W50/023; G05B9/02; G06F11/20; G06F11/30
Domestic Patent References:
WO2018030032A12018-02-15
WO2013121545A12013-08-22
Foreign References:
JP2014154043A2014-08-25
JPH01293451A1989-11-27
JP2016023603A2016-02-08
Attorney, Agent or Firm:
TODA Yuji (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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