消除涌浪对海底声学地层剖面影响的处理技术研究  

Research on processing technique of eliminating wave-induced distortion effect on sub-bottom profile

作　　者：罗进华[1] 潘国富[1] 丁维凤[1] 

机构地区：[1]国家海洋局第二海洋研究所,杭州310012

出　　处：《声学技术》2009年第1期21-24,共4页Technical Acoustics

基　　金：国家海洋局青年海洋科学基金(2005309)

摘　　要：提出了一种新的消除海底声学地层剖面记录中海洋涌浪影响的办法。该方法在能量比法拾取初值的方法上加以改进,自动拾取剖面记录中受涌浪影响的海底反射面,对拾取的海底反射面进行中值滤波和均值滤波,得到较为光滑的海底面,滤波前后的海底面反射时间差值为涌浪造成的时移量,从原始数据中除去这一时移量,即可消除涌浪对剖面记录的影响。处理后的浅地层剖面分辨率得到很大提高。To eliminate the influence of wave on the sub-bottom profile, a new processing method is presented. The proposed approach firstly picks up the first arrival automatically based on the improved energy ratio method, and then performs median filtering and moving average filtering to process the first arrival according to its feature. Difference between the unprocessed and post-processed first arrival is considered to be the time shift caused by the wave. Subtracting the time shift from the original profile record can eliminate the wave-induced distortion effect on sub-bottom profile. The real data processing results show that this processing method is effective and useful.

关 键 词：涌浪 声学地层剖面 自动拾取 滤波 

分 类 号：P631[天文地球—地质矿产勘探]