Discrete waveform data compression method based on slope distribution

A technology of waveform data and compression method, applied in the direction of electrical components, code conversion, etc., can solve problems such as huge waveform data

Active Publication Date: 2018-05-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Abstract
  • Description
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Problems solved by technology

Taking the insulators in the power system as an example, the leakage current waveform signal can be used to diagnose the state of the insulators. However, dirty insulators will generate a large amount of alarm waveform data in wet conditions, ...

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  • Discrete waveform data compression method based on slope distribution
  • Discrete waveform data compression method based on slope distribution
  • Discrete waveform data compression method based on slope distribution

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Embodiment Construction

[0043] The basic idea of ​​the method is: first, convert the original discrete waveform data into a slope sequence, that is, take the slope value of the straight line where the adjacent points of the original discrete data waveform are located, and form a set from these slope values, the purpose of finding all the slope values ​​is In order to determine a small number of representative slope values ​​to lay the foundation for compression; secondly, according to the distribution of the slope sequence, select several category centers as representative slope values; thirdly, within the allowable range of error, each representative slope value Approximate the line segments of each adjacent point in the original discrete data waveform, and connect each line segment together to realize the approximation to the original discrete waveform, and then realize the sparse representation of the original discrete waveform data; then, perform the sparse representation of the original discrete w...

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Abstract

The invention relates to a discrete waveform data compression method based on a slope distribution. The method comprises the following steps: first of all, converting original discrete waveform data into a slope sequence, and enabling these slope values to form a set; next, according to a distribution of the slope sequence, selecting a plurality of category centers and taking the plurality of category centers as representative slope values; once again, in an error allowed range, enabling each of the representative slope values to approximate a line segment for each of adjacent points in an original discrete data waveform and connecting each line segment together, thereby implementing an approximation to the original discrete waveform and thus implementing a sparse representation of the original discrete waveform data; and then, performing compressed encoding on the sparse representation of the original discrete waveform data, thereby implementing compression processing on a waveform signal. A result shows that the method provided by the invention can effectively implement the compression of the waveform data under a condition in which useful components are retained.

Description

technical field [0001] The invention relates to the technical field of data compression, in particular to a new method for compressing discrete waveform data based on slope distribution. Background technique [0002] Waveform data plays a very important role in equipment monitoring in the industrial field. Taking power systems as an example, many monitoring systems use waveform data to monitor power equipment, such as transformers, circuit breakers, arresters, insulators, etc., all through waveform data. A signal unfolds a diagnostic of its state. [0003] A large amount of data is generated during the monitoring of industrial equipment using waveform signals. Taking the insulators in the power system as an example, the leakage current waveform signal can be used to diagnose the state of the insulators. However, dirty insulators will generate a large amount of alarm waveform data in wet conditions, and there are many insulators on the transmission line. Once rainy and snowy...

Claims

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Application Information

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IPC IPC(8): H03M7/30
CPCH03M7/3059
Inventor 黄建才
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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