涡流探头的屏蔽对扫频测量灵敏度的影响

IF 1.1 4区工程技术 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Applied Electromagnetics and Mechanics Pub Date : 2023-11-29 DOI:10.3233/jae-230138

Arjun A.R., B. Sasi, Anish Kumar

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引用次数: 0

摘要

在样品边界附近进行测量时，涡流测量容易受到边缘效应的影响。为了减少这些边缘效应，通常会使用铁氧体屏蔽，将磁场限制在屏蔽体积内。然而，它们对扫频涡流 (SFEC) 测量中电导率变化的灵敏度的影响尚未得到研究。我们开发了一个二维轴对称有限元模型 (FEM)，用于预测 SFEC 探头阻抗的频率响应。该模型预测，增加屏蔽后，边缘效应最小，但灵敏度降低。为优化探头设计以提高屏蔽铁氧体探头的灵敏度，进行了模拟研究。基于这些结果，我们构建了一个带有定制铁氧体屏蔽的探头，并通过实验将其屏蔽效率和探头灵敏度与带有传统铁氧体屏蔽的探头进行了比较。

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Effect of shielding of eddy current probes on the sensitivity for sweep frequency measurements

Eddy current measurements are prone to edge effects when measurements are carried out near a sample boundary. In order to reduce these edge effects, typically ferrite shields are used which constrain the magnetic field within the shield volume. However, their effects on sensitivity towards changesin conductivity for Sweep Frequency Eddy Current (SFEC) measurements have not been investigated. A 2D axisymmetric Finite Element Model (FEM) has been developed to predict the frequency response of impedance of SFEC probes. The model predicted that the addition of shields minimized edge effect but with reduced sensitivity. A simulation study is carried out to optimize the probe design to increase the sensitivity of shielded ferrite probes. Based on these results, a probe is constructed with a custom ferrite shield and its shielding efficiency and probe sensitivity are compared experimentally with those for the probe with conventional ferrite shields.

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来源期刊

International Journal of Applied Electromagnetics and Mechanics 物理-工程：电子与电气

CiteScore

1.70

自引率

0.00%

发文量

100

审稿时长

4.6 months

期刊介绍： The aim of the International Journal of Applied Electromagnetics and Mechanics is to contribute to intersciences coupling applied electromagnetics, mechanics and materials. The journal also intends to stimulate the further development of current technology in industry. The main subjects covered by the journal are: Physics and mechanics of electromagnetic materials and devices Computational electromagnetics in materials and devices Applications of electromagnetic fields and materials The three interrelated key subjects – electromagnetics, mechanics and materials - include the following aspects: electromagnetic NDE, electromagnetic machines and devices, electromagnetic materials and structures, electromagnetic fluids, magnetoelastic effects and magnetosolid mechanics, magnetic levitations, electromagnetic propulsion, bioelectromagnetics, and inverse problems in electromagnetics. The editorial policy is to combine information and experience from both the latest high technology fields and as well as the well-established technologies within applied electromagnetics.