基于自相关函数的地震信号自适应端点检测

英文篇名：Adaptive endpoint detection of seismic signal based on auto correlated function
中文刊名：核电子学与探测技术
英文刊名：Nuclear Electronics & Detection Technology
作者：范万春 ; 邱宏茂 ; 孙煜 ; 施仁 ; 李真富
英文作者：FAN Wan chun 1 ; 2 ; QIU Hong mao 2 ; SUN Yu 2 ; SHI Ren 1 ; LI ZHEN fu 2( 1 Depart of Automatic Control ; Xi′an Jiaotong ; Xi′an of Shaanxi Prov. 710049 ; China ; 2 Northwest Institute of Nuclear Technology ; Xi′an of Shaanxi Prov
中文关键词：自相关 ; 相似性 ; 地震信号 ; 端点检测
英文关键词：auto-correlation ; similarity ; seismic signal ; endpoint detection
出版日期：2001-09-20
机构：西安交通大学自动控制系!陕西西安710049西北核技术研究所,西安69信箱14分箱,陕西西安710024,西北核技术研究所!西安69信箱14分箱,陕西西安710024,西北核技术研究所!西安69信箱14分箱,陕西西安710024,西安交通大学自动控制系!陕西西安710049,西北核技术研究所!西安69信箱14分箱
年：2001
期：05
出版单位：核电子学与探测技术

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 ,采用本算法仍能较准确地检测出地震信号的端点位置
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.

引文

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