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Parallel redundancy system and method based on CAN bus level interface

A technology of CAN bus and redundant system, which is applied in the field of CAN bus transmission, can solve problems such as the inability to realize parallel connection of devices, and achieve the effect of parallel connection

Pending Publication Date: 2022-06-28
中国兵器装备集团自动化研究所有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the parallel redundancy method at this stage is point-to-point sending and receiving, which cannot realize parallel connection of devices. At the same time, there is no retransmission mechanism for data in the redundant system

Method used

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  • Parallel redundancy system and method based on CAN bus level interface

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Embodiment 1

[0033] A parallel redundant system based on a CAN bus level interface, comprising a first endpoint and a second endpoint with a message redundancy backup function, the first endpoint and the second endpoint can be used as a receiving end or a transmitting end , a number of buses are arranged in parallel between the first endpoint and the second endpoint, and the first endpoint and the second endpoint are arranged at the far end of the bus, and also includes a number of messages with redundant backup The intermediate endpoint of the function, several of the intermediate endpoints can be used as a receiving end or a transmitting end, each of the intermediate endpoints is connected to N buses, and is used to receive data from the N buses or send data to the N buses. On the bus, where N is a positive integer not less than 2.

[0034] In this embodiment, the first endpoint, the second endpoint, and the intermediate endpoint all include an FPGA and N CAN transceivers, the number of ...

Embodiment 2

[0044] The present invention also discloses a parallel redundancy method based on a CAN bus level interface, using the parallel redundancy system of Embodiment 1, comprising the following steps:

[0045] Step 1. The sending end receives the data of the upper computer, and copies the data N copies, and the N copies of the data are respectively sent to N buses.

[0046] The specific implementation steps are as follows:

[0047] Step 1.1, the host computer sends the data to the sending buffer of the sending end;

[0048] Step 1.2, the IP core of the sending end copies the data stored in the sending buffer into N copies, and at the same time, configures sequential frames and redundant frames on each copy of the data; sequential frames are used to record data. The sequence, sequential frames and redundant frames are at the very end of the data.

[0049] Step 1.3: Send the data configured in step 1.2 on N buses at the same time through the N CAN transceivers.

[0050] Step 2: The...

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Abstract

The invention relates to the technical field of CAN bus transmission, and discloses a parallel redundancy system based on a CAN bus level interface, which comprises a first endpoint and a second endpoint with a message redundancy backup function, and the first endpoint and the second endpoint can be used as a receiving end or a sending end. A plurality of buses are arranged between the first endpoint and the second endpoint in parallel, the first endpoint and the second endpoint are arranged at the far ends of the buses, the system further comprises a plurality of middle endpoints with a message redundancy backup function, the middle endpoints can serve as receiving ends or sending ends, and the middle endpoints can serve as receiving ends or sending ends. Each middle endpoint is connected with N buses and used for receiving data of the N buses or sending the data to the N buses, and the invention further discloses a parallel redundancy method based on the CAN bus level interface. According to the invention, a plurality of intermediate nodes are arranged on the bus in parallel, and each intermediate node is a device, so that the parallel connection of the devices is realized.

Description

technical field [0001] The invention relates to the technical field of CAN bus transmission, in particular to a parallel redundant system and method based on a CAN bus level interface. Background technique [0002] With the advancement of industrial technology, in order to further improve the reliability of the industrial Ethernet, the technology of message redundancy backup has emerged. At the sending end, each message to be sent is copied to obtain two identical messages, and the two messages are sent through different ports. [0003] However, the current parallel redundancy methods are all point-to-point transmission and reception, which cannot realize the parallel connection of devices. At the same time, the data in the redundant system has no retransmission mechanism. SUMMARY OF THE INVENTION [0004] The invention provides a parallel redundant system and method based on a CAN bus level interface, which realizes the parallel connection of devices. [0005] The prese...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B9/03
CPCG05B9/03
Inventor 徐碧辉曾熠唐建程林
Owner 中国兵器装备集团自动化研究所有限公司
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