Research on Defect 2-D Inversion Based on Gradient Tensor Signals of Metal Magnetic Memory

doi:10.3969/j.issn.1000-1093.2017.05.020

Abstract

Abstract: Metal magnetic memory (MMM) technology is a nondestructive detection method which is used for early diagnosis of microscopic damage and stress concentration. Since the defect profile is difficult to reconstructed by the existing methods, an analysis method based on magnetic gradient tensor is proposed. A magnetic gradient tensor measuring method is designed based on the analysis of measuring essential factors of magnetic gradient tensor, and a characteristic parameter of horizontal gradient modulus is used to estimate the damage location and boundary by horizontal gradient modulus maximum value. The experimental results of crack 2-D inversion show that the proposed method based on magnetic gradient tensor is not influenced by detection direction, and it is an effective and feasible approach for damage two-dimensional inversion. Key

Key words: electromagnetics, metalmagneticmemory, magneticgradienttensor, magnetictotalhorizontalgradientmodulus, two-dimensionalinversion

CLC Number:

TG115.27

CHEN Hai-long， WANG Chang-long， ZUO Xian-zhang， ZHU Hong-yun. Research on Defect 2-D Inversion Based on Gradient Tensor Signals of Metal Magnetic Memory[J]. Acta Armamentarii, 2017, 38(5): 995-1001.

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第38卷第5期
2017 年5月兵工学报ACTA
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