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CAN bus self-checking and repairing device and method

A CAN bus, self-reset technology, applied in data reset devices, bus networks, error detection/correction, etc., can solve the problems of vehicles unable to achieve self-repair, difficult hardware self-reset of vehicles, etc., to achieve self-repair and ensure communication. effect of function

Active Publication Date: 2020-11-03
ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, to achieve these resets, it is necessary to manually disconnect the battery power supply, but the vehicle has no way to achieve self-repair during driving. The pile head needs corresponding tools. If there is no corresponding tool at present, it is difficult for the vehicle to realize hardware self-resetting through rescue.

Method used

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  • CAN bus self-checking and repairing device and method
  • CAN bus self-checking and repairing device and method

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Embodiment Construction

[0038] In order to enable those skilled in the art to further understand the features and technical contents of the present invention, the embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings and implementation methods.

[0039] Such as figure 1 Shown is a schematic structural view of a CAN bus self-checking and repairing device in an embodiment of the present invention, the device is used for a CAN bus with at least one CAN node, and the device includes: a gateway controller and an electrical connection with the gateway controller 1. A power controller connected to the CAN nodes one by one, the power controller is used to control the on-off of the CAN node power supply; the gateway controller is located on the CAN bus and is used to monitor the bus signal of each CAN node. When one or more CAN nodes send invalid signals, send a software self-reset command to the CAN nodes that send invalid signals through the CAN...

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Abstract

The invention relates to the field of network communication and on-board diagnosis, in particular to a CAN bus self-checking and repairing device and method. The device includes: a gateway controller and a power controller electrically connected to the gateway controller and connected to the CAN nodes one by one, the power controller is used to control the power on and off of the CAN node; the gateway controller is located at On the CAN bus, it is used to monitor the bus signal of each CAN node. When any one or more CAN nodes send invalid signals, a software self-reset command is sent to the CAN nodes that send invalid signals through the CAN bus, so that the The CAN node performs software self-reset; when any one or more CAN nodes cannot send out signals, control the power controller connected to the CAN nodes that cannot send out signals to disconnect the power supply and then connect the power supply, so that the CAN nodes that cannot send out signals can perform hardware reset. Self reset. Through the invention, the self-repair of the network nodes on the CAN bus network is realized, and the communication function of the whole vehicle is guaranteed.

Description

technical field [0001] The invention relates to the field of network communication and on-board diagnosis, in particular to a CAN bus self-checking and repairing device and method. Background technique [0002] There are multiple ECUs (electronic controller units) on the CAN (Controller Area Network) line system on the car; these ECUs communicate with each other through the CAN bus channel, and then cooperate with each other to realize certain functions on the car. However, when the car is running, one or more ECUs may have a software entry vulnerability, or the ECU may enter a fault state due to external interference. At this time, the signals sent by these faulty ECUs will become invalid values, or cannot send signals; and other ECUs related to the faulty ECU will also be restricted. These software loopholes and some external interference can be solved by ECU software self-resetting or hardware self-resetting. At present, to achieve these resets, it is necessary to manua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/24H04L12/26H04L12/40H04L12/12G06F11/22G06F1/24
CPCH04L12/12H04L12/40006H04L12/40182H04L43/0817G06F1/24G06F11/221H04L2012/40215H04L41/0661
Inventor 杨法松
Owner ANHUI JIANGHUAI AUTOMOBILE GRP CORP LTD
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