Data lossless compression method for data transmission of remote monitoring system

A remote monitoring system and data transmission technology, applied in signal transmission systems, electrical signal transmission systems, instruments, etc., can solve the problems of increasing data redundancy and transmission costs, increasing the number of data bits, etc., to achieve easy hardware programming, data The effect of reducing transmission costs and reducing data redundancy

Inactive Publication Date: 2008-06-11
SHANGHAI JIAO TONG UNIV
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Problems solved by technology

This invention has the following deficiencies: [1] A data frame of the CAN bus includes 5 parameters of the total length of parameter group data, engine speed, engine water temperature, fuel oil level, engine oil pressure, and vehicle power supply voltage, accounting for 16 bytes. After converting it into decimal system and then transmitting, it increases the number of data bits; [2] For slowly changing state data such as water temperature, oil level, pressure, and voltage, it does not use its slow changing characteristics to compress and transmit data, but Duplicate transmission, increasing data redundancy and transmission cost

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  • Data lossless compression method for data transmission of remote monitoring system

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing and specific embodiment, the present invention is described in further detail: embodiment is implemented under the premise of technical solution of the present invention, has provided detailed implementation mode and process, but protection scope of the present invention is not limited to the following the described embodiment.

[0024] In the process of remote real-time monitoring of hydraulic crawler cranes, it is necessary to continuously collect and send CAN bus data of multiple state parameters with multiple ID numbers to the remote monitoring center with a sending cycle of 20 seconds. The method of the present invention is illustrated by taking one data collection, encoding, and transmission in each cycle of the ID as an example. For multiple parameters of multiple IDs, it is only a parallel combination of the following methods.

[0025] As shown in Figure 1, it is assumed that the 3 CAN bus data collected continuousl...

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Abstract

The invention discloses a data lossless compression method for remote monitoring system data transmission, belonging to the remote monitoring technical field; the invention comprises a historical data resister with the length of 26 characters and a coding dictionary, wherein the real-time monitored status data are collected, coded and transmitted in periodic cycles, the new data are compared with the historical data character by character, the character statistical coding which is continuously unchanged is realized the redundancy removal compression. The invention has the advantages of high data compression ratio on slow acting monitoring status data, simple and quick coding and decoding algorism, small data buffer area needed and easy realization of hardware programming; moreover, the invention also has the advantages of greatly reducing the data volume and the data transmission cost of the remote data transmission and improving real time and reliability of the data transmission.

Description

[0001] new technology [0002] The invention relates to a data compression method in the technical field of remote monitoring, in particular to a data lossless compression method for data transmission in a remote monitoring system. Background technique [0003] With the vigorous development of wireless mobile communication networks, remote monitoring technology based on mobile communication networks has also been more and more applied. Monitoring information includes video, images, GPS latitude and longitude, and various status parameters of monitoring objects. It is hoped that more and more Well, many applications prefer to monitor objects in real time. Restricted by data transmission bandwidth, transmission cost, transmission rate, etc., it is hoped to reduce the amount of transmitted data as much as possible; in order to increase the amount of monitoring information and reduce the amount of transmitted data, data compression must be performed, and it is hoped that the compr...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G08C19/16G08C19/28
Inventor 何创新刘成良李彦明
Owner SHANGHAI JIAO TONG UNIV
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