基于相关系数的地震波快速定位算法研究与实现

Research and Implementation of Fast Locating Algorithm of Seismic Waves Based on Correlation Coefficients

地震波在不同介质中的传播速度有很大的差别,为了解决因测量速度误差给定位带来的影响,提出一种可以忽略波速的地震波定位方法。通过对现有定位方法的研究,在波速均匀、信噪比较高的模型中,对于在传感器阵列内的震源,时差法的定位精度最高。因此在时差法的基础上,基于快速准确的原则,采用相关系数作为判定条件,使用有限元法反演震源位置的这种算法,与目前比较先进的震源扫描法进行相比,在满足一定条件时的定位速度更快。

The propagation speed of seismic wave has great differences in different media. In order to solve the impact of the locating error due to the speed measurement deviation,this paper proposes a locating method based on seismic waves whose speed can be ignored. Through the research on existing locating methods,in the model of uniform velocity and higher signal- to- noise ratio and within the sensor array of seismic source,the time- difference method has the highest accuracy. Therefore,on the basis of the time- difference method and its rapidity and accuracy,this paper chooses the correlation coefficient as the determinate condition,using the finite element method to invert seismic source position. By comparing with the current advanced source- scanning algorithm,it locates faster when meeting certain conditions.