一种快速计算三维不规则缺陷磁荷分布的方法
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上海电力大学自动化工程学院

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TM153.1; TH878

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国家自然科学基金(51906133)


A Fast Method for Calculating the Magnetic Charge Distribution of 3D Irregular Defects
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Shanghai University of Electric Power,College of Automation Engineering

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    摘要:

    漏磁检测(MFL)技术在铁磁性材料缺陷检测领域中得到了广泛应用,其中磁偶极子法是目前应用最广泛的从结构缺陷中预测漏磁的数学方法。磁偶极子法多用于规则缺陷的漏磁信号预测,对于复杂缺陷,已有的单元磁偶极带叠加模型可以预测其漏磁信号,但是由于模型计算所需的复杂缺陷磁荷密度未知,且其分布不均匀,计算复杂。因此,本文提出了离散磁荷密度场的计算方法,该方法可以快速计算三维不规则缺陷的磁荷密度,结合单元磁偶极带叠加模型直接进行漏磁信号预测,以降低计算复杂度,迅速而准确地获取三维不规则缺陷的漏磁信号。将该方法用于单元磁偶极带叠加模型得到的预测信号与COMSOL软件仿真信号比较,表明该方法是可行的。经过实验验证:该方法的单元磁偶极带叠加模型相比于原模型预测性能明显提升,预测误差最大减少90.08%,计算时间减少97.43%,为三维不规则缺陷的磁荷分布计算提供了快速有效的解决办法。

    Abstract:

    Magnetic flux leakage detection (MFL) technology has been widely used in the field of ferromagnetic material defect detection, in which the magnetic dipole method is the most widely used mathematical method to predict magnetic flux leakage from structural defects. The magnetic dipole method is mostly used to predict the magnetic flux leakage signal of regular defects. For complex defects, the existing unit magnetic dipole band superposition model can predict the magnetic flux leakage signal, but because the magnetic charge density of complex defects required by the model calculation is unknown, and its distribution is uneven, the calculation is complex. Therefore, this paper proposes a calculation method of discrete magnetic charge density field, which can quickly calculate the magnetic charge density of three-dimensional irregular defects, and directly predict the magnetic flux leakage signal combined with the unit magnetic dipole band superposition model, so as to reduce the computational complexity and quickly and accurately obtain the magnetic flux leakage signal of three-dimensional irregular defects. The method is applied to the prediction signal obtained by the unit magnetic dipole band superposition model and the COMSOL software simulation signal, which shows that the method is feasible. The experimental results show that the prediction performance of the unit magnetic dipole band superposition model is significantly improved compared with the original model, the maximum prediction error is reduced by 90.08%, and the calculation time is reduced by 97.43%, which provides a fast and effective solution for the calculation of the magnetic charge distribution of three-dimensional irregular defects.

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茹黎爽,韩文花. 一种快速计算三维不规则缺陷磁荷分布的方法[J]. 科学技术与工程, , ():

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  • 收稿日期:2024-03-26
  • 最后修改日期:2024-04-24
  • 录用日期:2024-04-25
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