Research On Noise Reduction Of Seismic Wave Signal Based On Wavelet Packet Analysis And Implementation

In recent years,the constructing of large-scale construction project is increasing,and it is of great practical significance to evaluate the stability and safety of the underground structure of the construction area by seismic exploration technology.Seismic exploration uses different characteristics of the different media between the ground through analysis of the artificial response of the earthquake wave response,and accesses to the nature and shape of the formation structure.However,the seismic wave data often contains different kinds of noise,so filtering out the noise in the seismic wave signal,improving the signal to noise ratio and increasing the reliability of the data used for analysis are particularly important.In this paper,based on the seismic exploration before the construction of largescale project,the multi-threshold noise reduction principle,noise reduction step and the key parameter setting of the wavelet packet are studied based on the noise reduction of the seismic wave signal.NET-based platform using C # language designs the seismic wave signal noise reduction software.This paper mainly completed the following work:(1)The influence of random noise on the dynamic characteristics of seismic waves is analyzed by combining the amplitude and frequency of waves in the process of seismic wave propagation.(2)Analyze the advantages of wavelet packet multi-threshold de-noising method with respect to Fourier transform noise reduction,and study the influence of three main parameters in wavelet packet multi-threshold noise reduction on noise reduction.(3)Perform noise reduction simulation of synthetic seismic wave data and complete several noise reduction methods.(4)Based on the.NET platform,the design of visual noise reduction software is completed by C # language,and the noise of the seismic wave signal is analyzed and the noise reduction effect is analyzed.The implementation of the noise reduction method can reduce the noise of the seismic wave signal.The higher the signal-to-noise ratio is,and the smaller the root mean square error will be.The designed noise reduction software is simple and practical,and can be used to detect the field data processing analysis.