Industrial real-time data compression method with high compression ratio

A technology of real-time data and compression method, applied in the direction of electrical components, code conversion, etc., can solve the problems of long compression time, increase of storage devices, and poor data effect, and achieve reduction of calculation time, improvement of speed, and improvement of real-time performance Effect
CN102437854BInactive Publication Date: 2014-03-26UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2014-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an industrial real-time data compression method with a high compression ratio. The method is characterized by: reading in n data points and using a minimum square fitting method to fit a linear equation; if the n data points do not satisfy that linear equation deviation is less than a compression threshold, storing a starting point, then reading in the n data points after the starting point to fit the linear equation and restarting; if the n data points satisfies, reading in and determining whether the subsequent data point data value deviation is less than or equal to the compression threshold Delta; if the deviation is less than the Delta, abandoning, continuously reading in and determining the subsequent data points till the deviation is larger than the compression threshold Delta; if the deviation is larger than the compression threshold Delta, recording a fitted value of the previous data point, taking the previous data point as a start of reading in the data, re-reading in the n data points so as to carry out fitting determination and storing till all the industrial real-time data is compressed. In the invention, a direction of the linear equation accords with a variation trend of the subsequent data points. In a certain compression threshold scope, a data compression ratio is good and the ratio is larger than the ratio obtained by using the traditional compression methods.
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Description

technical field

[0001] The invention belongs to the technical field of data compression, and more specifically relates to an industrial real-time data compression method with a high compression ratio. Background technique

[0002] 1. Overview of Data Compression

[0003] Data compression technology has been widely used in image, audio processing and other fields. The technology is becoming more and more advanced and mature and has formed an international standard, such as JPEG compression technology in the field of image processing, MP3 compression technology in audio processing, etc. However, due to the continuous increase in the capacity of modern storage devices, it is less used in the field of industrial automation. Massive real-time and historical data will be generated in power systems, fault detection and diagnosis systems, process control, process monitoring, and multi-channel data acquisition systems. In the automatic system, the data compression has not been widel...

Claims

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