TSP strong industrial electrical interference suppression method based on SVD-ICA

Abstract

The invention relates to a TSP strong industrial electrical interference suppression method based on SVD-ICA. Firstly, a hankel matrix is built for single-channel data interfered by strong industrialpower; SVD decomposition is performed on the built hankel matrix then, and an industrial electrical interference signal is rebuilt then; and, finally, sine and cosine signals as the FastICA input signals are respectively built according to industrial electrical interference frequency, and an effective signal is rebuilt through processing of a FastICA output component by utilizing the cross-correlation technology. It is verified that effective suppression of the fundamental frequency and harmonic interference of the industrial electric power can be achieved; and, compared with the existing industrial electrical interference suppression method, the TSP strong industrial electrical interference suppression method based on the SVD-ICA has the advantages of good noise suppression modification,small damage to the effective signal, no phase shift during processing and no influence on target positioning accuracy. Data processing is fast through the method, the cost of repeated collection dueto too large industrial electrical interference can be reduced, construction efficiency is improved then, and construction cost is saved at the same time; and the data quality is improved without changing collection and construction conditions, and the method is of great significance for improving the accuracy of geological prediction.

Description

Technical field: [0001] The invention relates to a method for suppressing TSP industrial electrical interference based on SVD-ICA. The method is used for suppressing TSP strong industrial electrical interference in the advanced geological prediction of tunnels. Background technique: [0002] SVD-ICA (Singular Value Decomposition-Independent Component Analysis) TSP (Tunnel Seismic Prediction) industrial electrical interference suppression method. [0003] TSP is a multi-wave and multi-component high-resolution seismic reflection detection technology using multi-point excitation and single-point reception, which is extremely important in the advanced geological prediction of tunnels. However, TSP will inevitably be subject to 50 Hz industrial electrical interference when collecting data, so the quality of the obtained seismic data will deteriorate, which will seriously affect the accuracy of TSP velocity estimation, the reliability and accuracy of reflection target positioning...

AI Technical Summary

Problems solved by technology

Blind source separation methods such as independent component analysis (ICA) need to satisfy positive definite conditions, otherwise there is no solution, and this method cannot determine the order and polarity of independent components

It can be seen that the above method is difficult to apply to industrial electrical interference suppression or the suppression effect is not ideal in TSP acquisition data

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