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Microseismic signal smoothness enhancing method based on total variation

A seismic signal and microseismic technology, applied in seismic signal processing, seismology, geophysical measurement, etc., can solve the problem of low real-time performance, and achieve the effect of reducing multiple solutions, high calculation efficiency, and small operation error

Inactive Publication Date: 2017-09-15
西南财经大学天府学院
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Problems solved by technology

[0017] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method based on full variation microseismic signal smoothing enhancement, which aims to solve the problem of low real-time performance of the existing method, and improve calculation efficiency while ensuring smooth signal enhancement , to ensure real-time computing needs

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  • Microseismic signal smoothness enhancing method based on total variation
  • Microseismic signal smoothness enhancing method based on total variation
  • Microseismic signal smoothness enhancing method based on total variation

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Embodiment

[0057] Such as figure 1 As shown, a method based on full variation microseismic signal smoothing enhancement includes the following steps:

[0058] Step (1) Collect microseismic data in the field:

[0059] Design microseismic monitoring equipment in the monitoring area, form a sensor sequence, and obtain multi-source vibration signals;

[0060] Step (2) on the original microseismic signal (such as image 3 shown) to preprocess the microseismic signal (such as Figure 4 shown);

[0061] According to the experimental shot data, set the correction direction matrix, revise the microseismic signal, and obtain each component data x(t), t=1,2...N, N is the total number of sampling points of the one-dimensional signal, and the sampling time interval is T, T=0.5ms, 0.6ms, 1ms, 2ms or 4ms;

[0062] Step (3) Establish the initial full variational microseismic signal model, and set the adjustment coefficient λ:

[0063] Microseismic signals are usually 3-component signals, and each ...

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Abstract

The invention relates to the technical field of microseismic signal processing, in particular to a method for smoothing and enhancing microseismic signals based on full variation, comprising the following steps: collecting microseismic signals; conventional preprocessing methods to obtain corrected microseismic data; The length of the data, set the window length and the harmonic coefficient; take the observation signal of a window length point by point, and use the linear chord algorithm to smooth the abnormal points to achieve the smoothing effect of the microseismic signal. The present invention enhances microseismic signals to obtain signal waveforms with high temporal-spatial resolution, which is beneficial to the first arrival of microseismic signals and multi-source signal classification; and the method of the present invention is simple, and while ensuring smooth signal enhancement, it improves Calculation efficiency, to ensure real-time calculation needs.

Description

technical field [0001] The invention relates to the technical field of microseismic signal processing, in particular to a method for smoothing and enhancing microseismic signals based on full variation. Background technique [0002] Microseismic technology has been widely used in the fields of deep well mining, slope detection, and advance prediction of geological disasters in tunnels. Microseismic signals are typical non-stationary weak signals, which are easily affected by the natural environment, construction noise, electromechanical pulse and other noises during the monitoring process, resulting in relatively weak energy of effective signals, and many rupture events are not easy to be identified, which in turn affects the reflection of the seismic source. play. Especially at this stage, real-time microseismic signal processing, fast multi-source signal classification, and high-precision positioning of seismic sources all require signal waveforms with high temporal and s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V1/28G01V1/36
CPCG01V1/288G01V1/36G01V2210/1232G01V2210/32
Inventor 陈婷
Owner 西南财经大学天府学院
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