基于自相关函数的地震信号自适应端点检测  

Adaptive endpoint detection of seismic signal based on auto correlated function

作　　者：范万春[1] 邱宏茂[2] 孙煜[2] 施仁[1] 李真富[2] 

机构地区：[1]西安交通大学自动控制系,陕西西安710049 [2]西北核技术研究所

出　　处：《核电子学与探测技术》2001年第5期348-351,共4页Nuclear Electronics & Detection Technology

基　　金：国防科研预先研究项目

摘　　要：在分析信号自相关函数的基础上 ,引用了自相关相似距离的概念 ,讨论了自相关相似距离对噪声和有噪信号的描述 ,并据此总结出基于自相关函数的地震信号端点检测方法。给出了算法的具体实现步骤 ,阐述了检测阈值的确定方法 ,并对此方法以及时域波形包络和人工查走时表地震信号端点检测方法得到的实验检测结果进行了比较。结果表明 ,即使在较低的信噪比条件下 。Based on the analysis of auto correlation function, the notion of the distance between auto correlation function was quoted, and the characterization of the noise and the signal with noise were discussed by using the distance. Then, the method of auto adaptable endpoint detection of seismic signal based on auto correlated similarity was summed up. The steps of implementation and detemining of the thresholds were presented in detail. The experimental results that were compared with the methods based on artificial detecting show that this method has higher sensitivity even in a low signal with noise ratio circumstance.

关 键 词：地震信号 自适应端点检测 自相关检测 自相关函数 自动监测 

分 类 号：P315.6[天文地球—地震学]