石油管道超声检测信号的两级自适应噪声消除算法  

Two-Stage Adaptive Noise Cancellation Algorithm for Ultrasonic Test of Oil Pipeline

作　　者：万江飞[1] 冯宪高[2] 刘清坤[3] 李维平[2] 谭德军[4] 

机构地区：[1]中国石油天然气集团公司通信公司,河北廊坊065000 [2]中国石油天然气管道第四工程公司,河北廊坊065000 [3]上海交通大学自动检测研究所,上海200240 [4]中国石化新乡输油公司,河南新乡453000

出　　处：《测试技术学报》2006年第3期240-245,共6页Journal of Test and Measurement Technology

摘　　要：针对石油管道缺陷超声检测信号的噪声消除问题,研究了一种两级自适应噪声消除算法.第一级自适应滤波器作为预处理级,使信号获得较好的相关性和信噪比,确保第二级自适应滤波器获得更优的性能.实测超声信号两级自适应滤波结果表明:两级自适应滤波算法能有效增强超声检测信号中的缺陷信号成分,显著提高信噪比.A two-stage adaptive noise cancellation algorithm for ultrasonic nondestructive testing of oil pipeline is studied in this paper. The first adaptive filter is used as a preconditioning stage so that its output signal has the requisite correlation property and high SNR （signal-to-noise ratio） to make the second adaptive filter more effective. The algorithm is applied to the actually measured ultrasonic signals and the results show that it can enhance the flaw components of detected signals efficiently and increase the SNR significantly.

关 键 词：两级自适应滤波 超声检测 噪声消除 

分 类 号：TE88[石油与天然气工程—油气储运工程]