Wave recording data processing method and system

A wave recording data and processing method technology, which is applied in the system field of wave recording data processing, can solve the problems of low compression rate of large distorted waveforms, achieve less time-consuming encoding and decoding, simple system, and increase encoding and decoding efficiency effect

Active Publication Date: 2016-08-31
SHENZHEN HOPEWIND ELECTRIC CO LTD
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Problems solved by technology

[0005] One of the technical problems to be solved by the present invention is to provide a processing method for recorded wave data, which overcomes the defect of low compression rate of large distorted waveforms in the prior art
[00

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  • Wave recording data processing method and system
  • Wave recording data processing method and system
  • Wave recording data processing method and system

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Embodiment Construction

[0039] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0040] Such as figure 1 As shown, the data compression of the processing method of wave recording data of the present invention comprises:

[0041] Firstly, the first-order or second-order difference operation is performed on the original waveform data, where the first-order difference equation is Y(k)=X(k)-X(k-1), and the second-order difference equation is Z(k)=Y (k)-Y(k-1)=X(k)-2X(k-1)+X(k-2).

[0042] Then, the sign bit and the absolute value of the difference are extracted from the difference result. The sign bit is composed of 1 bit, and is combined into a sign sequence by word and stored in the sign area of ​​the external memory.

[0043] The absolute value of each differential value is equally divided into several differential value fragments according to bits, and the bit length of each differential value fragment is n, and n is a divisor of ...

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Abstract

The invention relates to a wave recording data processing method and a system. The method comprises a data zipping step which includes the following aspects in details: calculating data difference; extracting from the data difference value the sign bits and combining them into symbol characters for storage; dividing the absolute value of the data difference value into fragments in an equal length; gathering how many times the fragments appear and taking their appearing times as weights to generate a fragment Huffman coding tree; gathering how many times measuring ranges appear and taking their appearing times as weights for to generate a measuring range Huffman coding tree; and according to the Huffman coding trees, coding and storing the data difference fragments and the measuring ranges; In the invention, a wave shape data zipping file storing structure comprises a recording head and a recording medium. The recording head comprises recording basic information, coding tree information and coding zone information. The recording medium comprises a coding tree zone, a symbol coding zone, a measuring range coding zone and a data difference coding zone. The system consists of a CPU processor, a sampling system, an external storing device and a wave recording triggering system. The sampling system, the external storing device and the wave recording triggering system are all connected to the CPU processor respectively. According to the invention, the compression ratio is influenced by waveform distortion to a small extent. The method and system are suitable for mixed zipping of state quantity and analog quantity. As they consume less processing memory and time, so they are cost-effective in implementation.

Description

technical field [0001] The invention relates to a method for compressing and decompressing wave recording data, and also relates to a system for processing wave recording data. Background technique [0002] Wave recording is generally used for electrical fault detection in power systems or power electronic systems. When a fault or other trigger source triggers the recording, the inspection device records the waveform of the required electrical quantity for analysis of the electrical quantity. Due to the large length of recorded waveform data, data repetition and large correlation, it is necessary to compress the waveform data to save storage space and data transmission time. [0003] The Chinese patent No. 201110417346.8 discloses "a method for compressing fault recording data based on disturbance indicators". compression. [0004] The above-mentioned existing wave recording data compression method has the following defects. Since the method is based on the first-order or ...

Claims

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Application Information

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IPC IPC(8): H03M7/30
CPCH03M7/3002
Inventor 周朝阳彭意成吕一航
Owner SHENZHEN HOPEWIND ELECTRIC CO LTD
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