Transmission control method and system of CAN information

A control method and control system technology, applied in CAN (Controller Area Network) information transmission control method and system field, can solve problems affecting driving safety, relevant controllers cannot obtain required information, vehicle network paralysis, etc. To achieve the effect of ensuring normal operation

Active Publication Date: 2013-06-19
BEIJING ELECTRIC VEHICLE
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

This will cause the sending controller to occupy the CAN bus all the time and other controllers cannot send messages, thus paralyzing the entire vehicle net

Method used

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  • Transmission control method and system of CAN information

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Embodiment Construction

[0025] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0026] Such as figure 1 As shown, it is a flowchart of safe processing of sending and receiving CAN information frames, a method for controlling the sending of CAN information, including:

[0027] Step 1, the first controller sends a frame of CAN information, and detects whether a controller receives it, and starts the first timer at the same time;

[0028] Step 2, if a receiving controller receives the CAN information, it considers that the CAN bus line is normal, and controls the first timer to be cleared;

[0029] Step 3, if the CAN message is not received by the receiving controller, it is judged whether the first timer reaches the set time threshold;

[0030] Step 4, if the first timer reaches the set first time threshold, the first controller sto...

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Abstract

The invention provides a transmission control method and a system of CAN information. A treatment strategy that a CAN information frame is not responded by a receive controller is confirmed through a first timer, a second timer, and the states of a first time threshold of the first timer and a second time threshold of the second timer. The problem that a transmission controller transmits the CAN information frame and the receive controller has no act. Thus, network communication efficiency is improved, and network system stability and traffic safety are ensured.

Description

technical field [0001] The invention relates to the field of automobile control, in particular to a CAN (controller area network) information transmission control method and system. Background technique [0002] With the continuous development of the automobile industry, the number of controllers in the car is increasing, and the signals transmitted through the CAN bus are also increasing. Each signal has a corresponding sending controller and receiving controller. Although the sending and receiving processing mechanism of the controller has been perfected at present, there are still software, hardware and transmission medium failures, so there will be situations where the sending controller sends CAN information without receiving the controller's response (NO ACK). This will cause the sending controller to occupy the CAN bus all the time while other controllers cannot send messages, thus paralyzing the entire vehicle network. As a result, the relevant controllers cannot ob...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCY02P90/02
Inventor 朱恩利李武斌石刚董利伟陈娟
Owner BEIJING ELECTRIC VEHICLE
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