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Dual-redundant CAN bus communication system and communicating method thereof

A technology of CAN bus and communication system, which is applied in the field of dual redundant CAN bus communication system, can solve the problems of distributed control network communication failure, singleness, etc., and achieve the effect of improving fault tolerance and reliability

Inactive Publication Date: 2008-10-15
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] Although the CAN bus already has high reliability, its reliability is based on a single CAN bus loop. Once any part of the bus has an instantaneous or permanent fault, it will cause a period of time. communication failure of the control network
In a typical network topology, the basic bus network has obvious advantages in fault tolerance to network node failures, but shows shortcomings in communication link failures

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  • Dual-redundant CAN bus communication system and communicating method thereof

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] Although the CAN bus itself already has high reliability, its reliability is based on a single CAN bus loop. Once any part of the bus has a transient or permanent fault, it will cause a period of time. Communication failure of the distributed control network. Therefore, for some communication systems that require high reliability and real-time performance, the transformation of its link structure is also necessary.

[0030] Based on the above reasons, the present invention adopts the structural design of single-machine dual redundant CAN bus. figure 1 It is a schematic structural diagram of the dual redundant CAN bus communication system designed by the present invention. As shown in the figure, the link structure in the dual redundant CAN bus communication system is not established on a single CAN bus loop, but uses two independent parallel CA...

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Abstract

The invention provides a dual-redundancy CAN bus communication system which is characterized in that: the communication system adopts a dual-bus structure; the dual-bus is provided with a plurality of CAN nodes; the CAN nodes comprise a node processor, two bus controllers and two bus drivers; the two bus controllers are respectively connected with different buses by the two bus drivers; the node processor and the two bus controllers are connected to control the communication of the bus controllers. The special dual-bus structure of the communication system effectively improves the fault-tolerant ability of communication links and the reliability of the whole system.

Description

technical field [0001] The invention relates to a high-reliability dual redundant CAN bus communication system in a distributed control network and a data communication method thereof, belonging to the technical field of communication. Background technique [0002] As the "meridian" of the distributed servo control system, the bus is responsible for data exchange and command transmission between subsystems. It is an important part of the distributed control system. Its performance directly determines the performance of the entire distributed control system. . CAN, the full name is "Controller Area Network", that is, Controller Area Network, which is one of the most widely used field buses in the world. CAN bus is a serial data communication protocol developed by German Bosch Company in the early 1980s to solve the data exchange between control and test instruments in modern automobiles. It is a multi-master serial communication bus. The basic design specification requires ...

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Application Information

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IPC IPC(8): H04L12/56H04L1/22H04L12/40
Inventor 孙汉旭贾庆轩冯涛叶平曹红玉
Owner BEIJING UNIV OF POSTS & TELECOMM
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