CAN network position timing influence factor detection system and method thereof

A technology of influencing factors and detection system, applied in the field of detection system of automobile network communication, can solve problems such as no communication, and achieve the effect of scientific and reasonable setting

Active Publication Date: 2014-10-08
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many factors that affect the bit timing, and the factors are mutually restrictive, which needs to be considered comprehensively.
At present, the setting of relevant parameters of alignment timing in China is only based on theoretical analysis, and there is no detection system and effective method to detect the influence of these factors on communication, which makes there are certain unknowns and risks in CAN network design.

Method used

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  • CAN network position timing influence factor detection system and method thereof
  • CAN network position timing influence factor detection system and method thereof
  • CAN network position timing influence factor detection system and method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0012] see image 3A CAN network bit timing influencing factor detection system detects the influence of the tolerance change of the oscillator on the network communication when the first node 1 is configured as a sending node. It proceeds according to the following steps in turn: 1), set the first node 1 and the second node 2 as sending nodes, send messages with identifiers 0x201 and 0x202 respectively, the sending cycle is 100ms, and the data content is 0x07C1F07C1F07C1F0, set Set the third node 3 as the receiving node; 2), set the first node 1, the second node 2 and the third node 3 to send or receive the message successfully, then the content output to the respective LCD display units is "send successfully" or "successful reception", once the sending or receiving fails, the content output to the respective LCD display unit will be locked as "sending failure" or "receiving failure"; 3) The second node can be configured according to the current actual network parameter confi...

Embodiment 2

[0014] see image 3 , the CAN network bit timing influencing factor detection system detects the influence of the first node 1 on the network communication caused by the change of the wire harness length when the first node 1 is configured as a sending node. It proceeds according to the following steps in turn: 1), set the first node 1 and the second node 2 as sending nodes, send messages with identifiers 0x201 and 0x202 respectively, the sending cycle is 100ms, and the data content is 0x07C1F07C1F07C1F0, set Set the third node 3 as the receiving node; 2), set the first node 1, the second node 2 and the third node 3 to send or receive the message successfully, then the content output to the respective LCD display units is "send successfully" or "successful reception", once the sending or receiving fails, the content output to the respective LCD display unit will be locked as "sending failure" or "receiving failure"; 3) The second node can be configured according to the current...

Embodiment 3

[0016] see image 3A CAN network bit timing influencing factor detection system detects the influence of the tolerance change of the oscillator on the network communication when the first node 1 is configured as a receiving node. It proceeds in sequence as follows: 1) Set the first node 1 and the second node 2 as the receiving node, set the third node 3 as the sending node, and send a message with the identifier 0x203, the period is 100ms, and the data content 0x07C1F07C1F07C1F0; 2), when the first node 1, the second node 2 and the third node 3 successfully send or receive the message, the content output to the respective LCD display unit is "send successfully" or "receive successfully", Once sending or receiving fails, the content output to the LCD display unit will be locked as "sending failure" or "receiving failure"; 3) According to the current actual network parameter configuration, configure the second node 2 and the third node 3 to oscillate The tolerance of the device...

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Abstract

The invention relates to a CAN network position timing influence factor detection system which is composed of a first node, a second node, a third node, a CAN bus section A and a CAN bus section B. The system is characterized in that the CAN bus section A is connected with the CAN bus section B, the first node is hooked on the CAN bus section A, and the second node and the third node are hooked on the CAN bus section B. The system can be used for detecting various factors influencing position timing in CAN network communication, the influence on communication from CAN controller position timing parameters, oscillator tolerance, transceiver types, harness parameters (length, characteristic impedance and transmission delay), impedance matching and common mode choke can be detected, the relevant parameters of position timing can be set more scientifically and reasonably, and the powerful technical support is provided for the stability of vehicle-mounted CAN network communication.

Description

technical field [0001] The invention relates to a CAN network bit timing influencing factor detection system and a method thereof, and belongs to a detection system for automobile network communication. Background technique [0002] CAN bus is an asynchronous serial multi-master communication protocol. Because of its fast speed and good stability, it is widely used in automotive network communication. In the CAN bus protocol, the performance of network communication is closely related to the network bit timing parameters, and users can optimize network communication performance by setting parameters such as bit rate, sampling point position, and synchronization jump width. However, there are many factors affecting bit timing, and each factor restricts each other, so it needs to be considered comprehensively. At present, the setting of relevant parameters of alignment timing in China is only based on theoretical analysis, and there is no detection system and effective method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26
CPCY02D30/50
Inventor 刘晓祥肖玉强高洪伟曲玲卫威
Owner CHINA FIRST AUTOMOBILE
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