基于磁记忆梯度张量信号的缺陷二维反演研究
发布时间：2018-08-17 14:58
【摘要】：金属磁记忆检测技术是一种能对铁磁材料早期微观损伤及应力集中进行有效诊断的无损检测方法,针对二维反演方法难以准确得到缺陷分布的问题,提出了磁记忆梯度张量分析方法。分析磁梯度张量的测量要素,设计了磁记忆梯度张量信号测量方案;将磁记忆信号水平梯度模量作为缺陷边界反演的特征量,通过水平梯度模量的极大值位置来确定缺陷的边界及分布。裂纹二维反演实验结果表明,该方法不受检测方向影响,可对缺陷二维分布进行准确反演。
[Abstract]:Metal magnetic memory detection is a kind of nondestructive testing method which can diagnose the early microscopic damage and stress concentration of ferromagnetic materials effectively. In view of the problem that the two-dimensional inversion method is difficult to accurately obtain the defect distribution, A magnetic memory gradient Zhang Liang analysis method is proposed. This paper analyzes the measuring elements of magnetic gradient Zhang Liang, designs the measuring scheme of magnetic memory gradient Zhang Liang signal, takes the horizontal gradient modulus of magnetic memory signal as the characteristic quantity of defect boundary inversion, The boundary and distribution of defects are determined by the maximum position of horizontal gradient modulus. The experimental results of two-dimensional crack inversion show that the method is independent of the direction of detection and can accurately inverse the two-dimensional distribution of defects.
【作者单位】： 军械工程学院无人机工程系;
【基金】：河北省自然科学基金项目(E2015506004)
【分类号】：TG115.284
，
本文编号：2188011
[Abstract]:Metal magnetic memory detection is a kind of nondestructive testing method which can diagnose the early microscopic damage and stress concentration of ferromagnetic materials effectively. In view of the problem that the two-dimensional inversion method is difficult to accurately obtain the defect distribution, A magnetic memory gradient Zhang Liang analysis method is proposed. This paper analyzes the measuring elements of magnetic gradient Zhang Liang, designs the measuring scheme of magnetic memory gradient Zhang Liang signal, takes the horizontal gradient modulus of magnetic memory signal as the characteristic quantity of defect boundary inversion, The boundary and distribution of defects are determined by the maximum position of horizontal gradient modulus. The experimental results of two-dimensional crack inversion show that the method is independent of the direction of detection and can accurately inverse the two-dimensional distribution of defects.
【作者单位】： 军械工程学院无人机工程系;
【基金】：河北省自然科学基金项目(E2015506004)
【分类号】：TG115.284
，
本文编号：2188011
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