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Vol. 172, Issue 6, June 2014, pp. 81-85

 

Bullet

 

Research on CAN Bus Break Fault Detection Method Based on Loading Frequency Modulated Signal
 

Chuanqiang Yu, Hongqing Hou, Hongjie Cheng, Qian Miao

Xiían Research Inst. of Hi-Tech Hongqing Town, Xiían 710025, P. R. China
Tel.: 13689250249

E-mail: 20016109@163.com

 

Received: 29 March 2014 /Accepted: 30 May 2014 /Published: 30 June 2014

Digital Sensors and Sensor Sysstems

 

Abstract: In allusion to the problem that bus break fault canít be detected when CAN bus is not in the process of data changing, a new method that through adding high frequency signal generator and corresponding detection unit on the bus network has been brought forward, and the CAN bus break fault detection method has been realized. In this paper, detection model of CAN bus break fault is constructed, the 5 MHz sinusoidal signal generator and circuit design of detection unit are also provided. Finally, the rationality of the new method is verified by a 4 nodes network. The research conclusions indicate that bus break fault detection can be detected in real-time and completely by this way. Besides, the provided method is not occupy the network band width and can solve the existing detection institution problem effectively, the apply prospect is very fine in the occasion whose reliability requirement is relatively high.

 

Keywords: CAN bus, Fault detection, FM signals, Frequency detection method.

 

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