Data lossless compression transmission method suitable for geophysical exploration

A geophysical exploration and data lossless technology, applied in the field of data transmission system, can solve the problems of high cost, no mention of data compression, large number of channels, etc., and achieve the goal of reducing data volume, data transmission time and data transmission rate effect of demand

Active Publication Date: 2013-07-10
HEFEI GUOWEI ELECTRONICS
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Problems solved by technology

For example, the 428 series launched by the French company Sercel has increased the transmission rate to 16Mbps based on the 8Mbps transmission rate of the 408 series. According to the manual, it does not mention data compression, and it is reasonable to speculate that it did not use the data compression transmission method, but framed and uploaded the original data collected; The reason lies in the large number of channels, no compression, no caching at all levels, and the use of such a high data transmission rate puts forward very high requirements on the transmission medium, so the "Hailiang" system uses a special cable, which is extremely expensive

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  • Data lossless compression transmission method suitable for geophysical exploration
  • Data lossless compression transmission method suitable for geophysical exploration
  • Data lossless compression transmission method suitable for geophysical exploration

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[0039] A data lossless compression transmission method suitable for geophysical exploration, m=1 in the following description, that is, n=8, there are 8 channels in one frame, and each channel has 8 sampling points, including the following steps:

[0040] (1) See Table 1 below. Each 8 sample point data collected by the ADC is regarded as a frame, each frame contains 8 data channels, each data channel contains 8 sampling data, and the data frame is used as the compression unit. Considering the frame header status word and parity byte, each data collected by the ADC occupies 3 bytes, and 192 bytes of pure data are compressed. In addition to pure data bytes, a frame also includes a frame with 10 bytes. Header status word and 2-byte check code;

[0041]

[0042] (2) Define variable S: If a certain data in a data channel in a frame only needs to be represented by 1 byte, then this data represents +1; if a certain data in a data channel only needs to be represented by If it is m...

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Abstract

The invention discloses a data lossless compression transmission method suitable for geophysical exploration. The data lossless compression method suitable for the geophysical exploration comprises the following steps: carrying out framing of sampling values of multiple sampling points, carrying out calculation of a variable S of data inside each channel in a frame according to a data lossless compression algorithm, then carrying out transmission of the compressed data finally according to the S selection compression processing method. The data lossless compression transmission method suitable for the geophysical exploration greatly reduces requirements of a system to the message transmission rate, reduces system design complexity, and increases system stability and manufacturing and maintenance cost of the system; in addition, the data lossless compression transmission method suitable for the geophysical exploration can effectively reduce data transmission time under the same data rate, and further reduces system dead time.

Description

[0001] technical field [0002] The invention relates to the field of data transmission systems in geophysical exploration instruments, in particular to a data lossless compression transmission method suitable for geophysical exploration. Background technique [0003] Data transmission in the seismic exploration system is a key issue. At present, most of the mainstream instruments use the transmission of the original acquisition data without compressing the data, which puts forward high requirements on the transmission rate, especially for large-scale seismic exploration systems. It supports tens of thousands of channels. Due to the limitation of transmission rate, caches must be added at all levels to complete the upload of collected data. On the one hand, this increases the design complexity of the system, and on the other hand, it also causes a longer dead time of the system. Based on the high requirements for data accuracy in later data analysis, the collected data must ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/22
Inventor 曹桂平陈静王映初高雅
Owner HEFEI GUOWEI ELECTRONICS
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