人工地震信号检测中相位信息的利用

英文篇名：APPLICATION OF PHASE INFORMATION TO SIGNAL DETECTION OF ARTIFICIAL SEISMIC SOURCE
中文刊名：大地测量与地球动力学
英文刊名：Journal of Geodesy and Geodynamics
作者：唐杰 ; 葛洪魁 ; 王宝善 ; 陈颙
英文作者：Tang Jie1) ; Ge Hongkui2) ; Wang Baoshan2) and Chen Yong2)1)College of Geo-Resources and Information ; China University of Petroleum ; Dongying 257061 2)Institute of Earthquake Science ; CEA ; Beijing 100036
中文关键词：人工地震 ; 相位权重叠加 ; 相位互相关 ; 波形互相关 ; 信噪比
英文关键词：artificial seismic source ; phase weighted stack ; phase cross-correlation ; waveform cross-correlation ; SNR(signal noise ratio)
出版日期：2009-06-15
机构：中国石油大学(华东)地球资源与信息学院;中国地震局地球物理研究所;
年：2009
期：03
出版单位：大地测量与地球动力学

摘要

针对固定台接收到的小药量激发的人工震源信号信噪比低的问题,基于人工震源激发的相似性,采用相位互相关和相位权重叠加的方法检测固定台站接收到的微弱信号,提高了弱信号的检测能力,可在200 km距离处接收到数十千克当量的炸药激发的信号。
In recent years more and more artificial sources are used to explore underground structures in the regional scale deep exploration.Usually,signals from artificial seismic source have low SNR(signal to noise ratio).Artificial source has a certain degree of repeatability among different shots.On the basis of this character,we use phase cross-correlation and phase weighted stack which can effectively improve the clarity of the signal to detect weak signal.The study shows that by use of dozens of kilograms of explosives the signal can be detected from the distance of 200 km.

引文

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