CAN bus analysis system with bus error analysis function

A CAN bus and bus error technology, applied in the field of automation technology and fault diagnosis, can solve problems such as real-time monitoring of faults, real-time error analysis, etc., and achieve the effect of compact structure and easy implementation

Active Publication Date: 2013-12-25
ZHEJIANG UNIV
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Problems solved by technology

However, there are few studies on real-time monitori...

Method used

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  • CAN bus analysis system with bus error analysis function
  • CAN bus analysis system with bus error analysis function
  • CAN bus analysis system with bus error analysis function

Examples

Experimental program
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Embodiment

[0024] The operating frequency of the Open3S500E FPGA development board in the CAN bus analysis system with bus error analysis function is 50MHz; The 3-pin of the first CAN transceiver CTM1050 is connected, the P127 input / output port of the Open3S500E FPGA development board is connected to the 3-pin of the second CAN transceiver CTM1050, the Open3S500E FPGA development board uses JTAG to burn the program, the first CAN transceiver Pin 2 of CTM1050 and the second CAN transceiver CTM1050 are grounded at the same time, pin 1 is connected to 5V positive voltage at the same time, pin 7 is used to connect CAN_L of CAN bus, pin 6 is used to connect CAN_H of CAN bus, all groundings are the same ; RS232 serial port is used to send data to the background computer.

[0025] The resistance of the terminal resistance at both ends of the CAN bus is 120Ω, the bus communication rate is set to 500kbps, the sampling period is 100ns, and the serial port baud rate is 115200bps. The CAN bus error ...

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Abstract

The invention discloses a CAN bus analysis system with a bus error analysis function. According to the CAN bus analysis system with the bus error analysis function, a bus signal is detected to record normal frames and transmission time stamps on a bus; when an error occurs to the bus and an erroneous frame exists, a bus error signal is triggered, the erroneous frame and a time stamp on the bus are recorded, the erroneous frame and an interrupted frame are subjected to analytical analysis, the type of the erroneous frame and the address of an interrupted node are determined, and the recorded information is transmitted to a backstage for follow-up processing. Compared with the prior art, the CAN bus analysis system with the bus error analysis function has the advantages of being capable of recording the information of the normal frames and the erroneous frame, having the bus error analysis function, and being capable of conducting pattern recognition according to bus analog signals, acquiring the source address of the interrupted frame, and providing preliminary analysis for positioning a failure node.

Description

technical field [0001] The invention relates to the field of automation technology and fault diagnosis technology, in particular to a CAN bus analysis system with a bus error analysis function. Background technique [0002] Fieldbus technology is the extension of computer digital communication technology to the field of industrial automation. The Controller Area Network (Control Area Network, CAN) bus is one of the most widely used field buses in the world. It is widely used in many fields such as vehicle electronic microcontroller communication, industrial network automation control, important power system and security monitoring. [0003] With the increasing complexity of the distributed network system architecture, many factors such as equipment aging, high correlation point action intensity, and strong electromagnetic interference in the operating environment in the actual industrialized network communication process are more likely to affect normal bus communication an...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/40
Inventor 雷勇汤龙浩袁勇
Owner ZHEJIANG UNIV
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