Reliable image data transmission method based on CAN bus

A technology of CAN bus and image data, applied in the field of data transmission, to achieve the effect of ensuring integrity and improving reliability

Inactive Publication Date: 2015-01-07
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the data is wrong, the entire packet retransmission according to this communication protocol design will waste a lot of bandwidth, and the data smaller than 65536 bytes cannot be effectively processed

Method used

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  • Reliable image data transmission method based on CAN bus
  • Reliable image data transmission method based on CAN bus

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Embodiment Construction

[0033] In order to facilitate those of ordinary skill in the art to understand and implement the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the implementation examples described here are only used to illustrate and explain the present invention, and are not intended to limit this invention.

[0034] The bottom layer of the CAN bus communication of the present invention adopts the CAN2.0B protocol specification, the application layer protocol selects CANOpen, and the frame format is an extended frame format.

[0035] please see figure 1 , the technical solution adopted in the present invention is: a reliable image data transmission method based on CAN bus, which is applied in a system with one master and multiple slaves, and there is only one master device, which is a system management computer, and the number of slave devices is determined by act...

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Abstract

The invention discloses a reliable image data transmission method based on a CAN bus. The method is based on a CAN expansion frame format and conducts dynamic secondary division based on row data, sequence matching, consistency checkout, error handling and the like on the image data blocks transmitted on the CAN bus so that transmission reliability can be improved, and data integrity can be guaranteed. By means of the method, the image data with the transmission height being 65536 pixels and the width being 65536 pixels can be transmitted at most, and great help is provided for expanding application of the CAN bus.

Description

technical field [0001] The invention belongs to the technical field of data transmission and relates to a reliable transmission method for sending image data from a data sender to a data receiver based on a CAN bus. [0002] Background technique [0003] CAN bus communication technology is widely used in comprehensive automation control systems in various fields. Its advantages of high reliability, strong anti-interference, simple development, low cost, short frame transmission and non-destructive arbitration technology make it widely used. But CAN itself is not a complete protocol, it only includes the physical layer and the data link layer, two underlying protocols, and high-level protocols need to be further developed for high-efficiency communication. In the current development of the CAN bus, the transmission method for large data blocks is usually based on the basic communication protocol, or fixed-length segmentation for massive data. This brings a lot of inconveni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32
CPCH04L67/12H04N1/32149H04L67/62
Inventor 周明刚周敬东陈源李敏慧黄云朋程钗王雷戚得众
Owner HUBEI UNIV OF TECH
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