用Wigner-Hough变换检测精密可控震源信号

英文篇名：Detection of Controlled Accurate Seismic Source Signal using Wigner-Hough Transformation
中文刊名：地震
英文刊名：Earthquake
作者：刘希康 ; 崔仁胜 ; 王洪体 ; 林湛
英文作者：LIU Xi-kang1 ; 2 ; CUI Ren-sheng1 ; 2 ; WANG Hong-ti1 ; 2 ; LIN Zhan1 ; 2(1.Key Laboratory of Earthquake Prediction ; CEA.Beijing 100036 ; China ; 2.Institute of Earthquake Science ; CEA.Beijing 100036 ; China)
中文关键词：精密可控震源 ; 检测与变换 ; 线性调频信号 ; Wigner-Hough变换
英文关键词：Signal detection ; CASS ; LFM ; Wigner-Hough transform
出版日期：2013-07-15
机构：中国地震局地震预测重点实验室;中国地震局地震预测研究所;
年：2013
期：03
出版单位：地震

摘要

本文提出基于Wigner-Hough变换实现精密可控震源信号的检测与变换的方法。精密控制震源发射并由地震台站观测设备记录下来的信号是连续线性调频振动信号(LFM),线性调频信号的Wigner-Ville变换是在时频平面内包含一条直线的图像,而Hough变换则是通过计算沿直线的积分可以有效检测图像中的直线,图像中的直线在Hough变换输出的图像中表现为一个峰值,用于精密控制震源信号的检测可以反映接收数据中存在的震源信号。本文针对精密控制震源信号检测中Wigner-Ville变换和Hough变换存在的问题开展研究,并提出了解决方案。通过对2009年在广东新丰江水库库区精密可控震源试验观测数据的实际处理,显示该方法是可行的,为精密控制震源信号的检测与变换找到了又一新的方法和技术途径。
A method for signal detection of controlled accurate seismic source(CASS) with Wigner-Hough transformation is presented in this paper.The vibrant signal radiated by CASS and recorded by instruments at seismic stations is continuous and linearly frequency modulated(LFM).The Wigner-Ville transformation of a LFM signal is a image of time-frequency plane with a line.The Hough transformation may detect lines by integration along with them.The lines in a image become peaks in its Hough transformation image,they indicates the CASS signal existence while in detection of CASS signal.We mainly worked on the problems in applying Wigner-Hough transformation to the detection of CASS signal.The processed result of data from the experiment around Xinfengjiang reservoir in 2009 prove that this method is feasible.

引文

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