Correlation canceling principle used in pipeline head inspection

被引：2

作者：

Zhang, Y ^{[1
]}

Ye, ZF ^{[1
]}

Zhang, L ^{[1
]}

机构：

[1] Univ Sci & Technol China, Inst Stat Signal Proc, Hefei 230026, Anhui, Peoples R China

来源：

NDT & E INTERNATIONAL | 2006年 / 39卷 / 04期

关键词：

magnetic flux leakage; finite element analysis; correlation canceling; pipeline head inspection;

D O I：

10.1016/j.ndteint.2005.01.003

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Magnetic flux leakage (MFL) is-concerning the detection of surface-near and surface-braking defects-the most commonly used method in inspecting steel pipelines after production and in service. In this paper, we attempt to use a new method based on MFL to inspect pipeline heads. We introduce the idea of a generalized characterization of the leading pipeline (in the joining region) in order to define a reference signal of a flaw, and discuss the method of separating the MFL signal of a superimposed defect near pipeline heads. The difference between reference signal and artificial flaw signal can be extracted properly by using the methodology of correlation canceling. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：253 / 257

页数：5