磁记忆二维检测的研究与工程应用  

Engineering Application Prospect and Research on Magnetic Memory in Two-dimensional Testing

作　　者：任吉林[1] 孙金立[2] 周培[1] 饶琪[1] 王振[1] 

机构地区：[1]南昌航空大学无损检测技术教育部重点实验室,南昌330063 [2]海军航空工程学院青岛分院,青岛266041

出　　处：《机械工程学报》2013年第22期8-15,共8页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51065022);无损检测技术教育部重点实验室开放基金(ZD200929006)资助项目

摘　　要：磁记忆检测作为早期诊断的新兴技术已受到国内外无损检测界广泛关注,但现有的磁记忆检测技术主要以单一方向上的漏磁场信号(法向分量)来进行判断,没有充分利用磁记忆检测信号的全部信息,容易出现漏检、误检等问题。针对该项检测技术的不足,介绍一种将磁记忆检测信号法向分量存在过零点和切向分量存在极大值的特征曲线联合应用的二维检测方法。该方法同时采集法向和切向的磁记忆信号,利用矢量合成法获取切向最大值,然后求取法向、切向分量一阶微分后合成的李萨如图,利用李萨如图的面积对应力状态进行分析,并将自主研制的磁记忆二维仪器应用到工程实践中。实践证明,该二维系统及检测方法能高效地对应力集中进行判定,可望成为实现磁记忆检测定量分析的新方法。People of domestic and foreign non-destructive testing have paid widely attention to the magnetic memory technology which is as the early diagnostic model technology. But the existing magnetic memory technology mainly depends on leakage magnetic field signal in a single direction （normal component） to determine, doesn＇t make full use of the entire information of magnetic memory signals, prone to undetected miscarriage of justice, etc. Aimed at the deficiency of the detecting technology, two-dimensional testing method which joint conducts characteristic curves of magnetic memory signals of the zero point in normal component and the maximum point in tangential component is introduced. Using this method, the normal component signals and tangential component signals of magnetic memory are collected at the same time, vector resultant method is adopted to extract the maximum value of tangential component signals, then the lissajous figure of synthesis between the gradient of normal component and the gradient of tangential component is obtained, the area of lissajous figure is led in for analyzing the stress state. And the self-developed two-dimensional magnetic memory apparatus are applied to engineering practice. Practice has proved that the two-dimensional system and detection method can efficiently be determined on the stress concentration, and it is expected to be a new method which can achieve the quantitative analysis of magnetic memory testing.

关 键 词：矢量合成 二维检测 李萨如图 定量分析 

分 类 号：TG115[金属学及工艺—物理冶金]