Heat switching system and heat switching method of dual-redundant CAN bus

A CAN bus and switching system technology, applied in the field of CAN bus dual-redundant hot-switching systems, can solve the problems that redundant channels cannot cover bus disconnection system-level fault conditions, high cost, and high complexity of node processors. Correct switching function, stable performance, guarantee the effect of fault tolerance and reliability

Active Publication Date: 2010-12-08
BEIJING INST OF SPACE LAUNCH TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

The use of redundant processors has high reliability, but due to the large number of nodes, the node processors are required to be complex and costly; while the use of redundant channels is difficult to cover system-level fault conditions such as bus disconnection

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  • Heat switching system and heat switching method of dual-redundant CAN bus
  • Heat switching system and heat switching method of dual-redundant CAN bus
  • Heat switching system and heat switching method of dual-redundant CAN bus

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Embodiment Construction

[0053] The dual redundant switching system of the present invention such as figure 1 , 2 As shown in , 3, a single processor is used to configure dual CAN controllers, dual CAN drivers and dual CAN bus structures. Each processor is paralleled with two CAN controllers A and B, namely CAN channel A and CAN channel B. Each controller Connect a CAN driver, and each CAN driver connects to a CAN bus.

[0054] The CAN driver management software running in the processor is responsible for the driver system and channel management functions. The function realization of the drive system is similar to that of the usual CAN drive software, which realizes the functions of system initialization, start, stop, and sending and receiving data, so I won’t go into details here. The channel management function is unique to the realization of dual redundant hot switching in the present invention. The upper-layer application software calls the CAN driver management software to send and receive dat...

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Abstract

The invention relates to a heat switching system and a heat switching method of a dual-redundant CAN bus, and provides a networking mode of a dual-redundant CAN bus system and a dual-bus heat exchanging method. The networking mode of the dual-redundant CAN bus system is as follows: two bus cables are designed in network; each node unit comprises a microprocessor and two CAN controllers which are respectively connected with two bus cables to form two independent CAN channels. The dual-bus heat switching method is as follows: during operation, one of the channels is a working channel for receiving and transmitting messages and the other channel is used as a reserve channel for only receiving messages; and a CAN drive control software in the node monitors the channel state in real time, switches the reserve channel into a working channel when a fault occurs in the working channel and repairs the original working channel and sets the working channel to be a reserve channel.

Description

technical field [0001] The invention relates to a CAN bus double-redundancy hot switching system and method, and belongs to the technical field of CAN bus network-based control systems and double-redundant hot switching. Background technique [0002] In the control system based on the bus network, the fault tolerance and reliability of the system are one of the technical difficulties. Many studies have been carried out at home and abroad, and redundant design adopts more technologies. Common redundant design technologies are generally implemented based on redundant processors or redundant channels. The use of redundant processors has high reliability, but due to the large number of nodes, the node processors are required to be complex and costly; while the use of redundant channels is difficult to cover system-level fault conditions such as bus disconnection. [0003] The CAN bus dual-redundancy network hot-switching system and method proposed by the present invention fill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/24H04L12/40H04L1/22
Inventor 许学雷孙招凤张洪彬
Owner BEIJING INST OF SPACE LAUNCH TECH
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