管道周向励磁漏磁检测磁路设计  

Design of the Magnetic Circuit in Circumferential Magnetic Flux Leakage Testing in Pipeline

作　　者：杨理践[1] 张国光[1,2] 刘刚[1] 高松巍[1] 

机构地区：[1]沈阳工业大学,沈阳110178 [2]沈阳化工学院,沈阳110142

出　　处：《化工自动化及仪表》2010年第1期39-40,44,共3页Control and Instruments in Chemical Industry

基　　金：国家科技支撑计划项目(2006BAK02B01-04)

摘　　要：管道周向励磁漏磁检测技术是一种新的检测方法,对于检测和定量评定轴向导向缺陷具有潜在优势。磁化器磁路设计是漏磁检测需要解决的首要问题,采用磁路计算原理研究管道磁化磁路中永磁体长度、厚度和宽度改变时,管道表面缺陷产生的漏磁场的变化情况,得到了缺陷漏磁场随永磁体长度、厚度和宽度改变时的变化规律。此规律有助于从整体上把握永磁体磁路设计,改善磁化效果,提高漏磁检测灵敏度,进而为漏磁检测磁路的设计提供依据。Circumferential magnetic flux leakage testing（CMFL） was a new implementation that had potential to detect and quantify axially oriented defects.The influence of the geometric size of permanent magnets on pipeline magnetization in magnetic circuit design was analyzed using the magnetic circuit calculation principle.The magnetic flux leakage due to a pipeline defect was calculated for various permanent magnet length,thickness and width.Correlation curves were given for the magnetic flux leakage along with the length,thickness and width of magnet.The result can be used in magnetic circuit design for improving testing sensitivity and for providing a method for the magnetization design in magnetic flux leakage testing.

关 键 词：漏磁检测 管道磁化 周向励磁 磁路计算 

分 类 号：TE973[石油与天然气工程—石油机械设备]