用于仪表系统屏蔽目的的电磁场建模

IF 0.6 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

Applied Computational Electromagnetics Society Journal Pub Date : 2021-01-01 DOI:10.47037/2021.aces.j.360817

A. Dagamseh, Qasem M. Al-Zoubi, Q. Qananwah, H. Jaradat

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引用次数: 0

摘要

─在任何感官系统中，对信道携带信号的电磁屏蔽是提供抗噪声测量系统的基本技术。如果外部电磁场干扰测量，可能会发生严重的故障和不确定性。通常，屏蔽是通过用薄导电空心结构包裹携带信道的信号来实现的。然而，对于这种结构，需要提供从外部进入内部组件的通道，用于电线连接，或更好的散热。这可以被认为是一个弱点，在这样的外部磁场可以穿透屏蔽结构。本文考虑了带槽的长空心圆柱结构的电磁屏蔽效果。建立了带槽薄导电屏蔽系统中感应涡流和不同条件下磁场的模型。目的是确定集成槽与结构的影响。通过确定屏蔽系数，研究了缝隙尺寸(α)和相对于激励磁场的位置(即偏角(β))对屏蔽效果的影响。结果揭示了屏蔽参数与屏蔽效果之间的内在关系。屏蔽面内缝隙的整合使屏蔽效果变差。然而，减小槽的尺寸可以显著提高连续圆柱结构的屏蔽效果。此外，利用结构的对称性，将槽定位在垂直于磁场通量的方向上，大大提高了屏蔽效果。这样一个模型可以用来评估屏蔽结构内集成开槽的有效性或成功程度，它可以应用于不同类型的仪器系统，特别是在传感器-电子接口。指标项─空心气缸，仪表系统屏蔽，磁场，屏蔽效果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Modelling of Electromagnetic Fields for Shielding Purposes Applied in Instrumentation Systems

─ In any sensory system, the Electromagnetic (EM) shielding of the channel-carrying signal is a fundamental technique to provide a noise-immune measurement system. Severe failures and uncertainty may occur if the external EM fields interfered with the measurements. Typically, the shielding is realized by enclosing the channel-carrying signal with thinconductive hollow structures. However, with such structures, it is required to provide access to the interior components from the outside, for wires' connections, or better heat dissipation. This can be considered as a weakness in such the external magnetic fields can penetrate through the shielding structure. In this paper, the EM shielding effectiveness is considered for long hollow-cylinder structures with slots. The induced eddy current in thin-conductive shielding systems with slots together with the magnetic fields at different conditions are modeled. The objective is to determine the impact of the integrated slots along with the structure. The influence of the slots' sizes (α) and position relative to the excitation magnetic field (i.e., the declination angle (β)) are investigated to evaluate the shielding effectiveness by means of the determination of the shielding factor. The results reveal the inherent relationship between the shield parameters and shielding effectiveness. The shielding effectiveness deteriorates by the slots' integration within the shielding surface. However, decreasing the size of the slots improves the shielding, significantly, towards the shielding effectiveness of the continuous cylindrical structure. Additionally, utilizing the symmetry in the structure positioning the slots in the direction perpendicular to the magnetic field flux improves the shielding effectiveness, drastically. Such a model can be considered to evaluate the degree of effectiveness or success of integrating opening slots within the shielding structure, which can be applied to different types of instrumentation systems specifically at the sensor-electronics interface. Index Terms ─ Hollow cylinder, instrumentation system shielding, magnetic field, shielding effectiveness.

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来源期刊

Applied Computational Electromagnetics Society Journal 工程技术-电信学

CiteScore

1.60

自引率

28.60%

发文量

审稿时长

9 months

期刊介绍： The ACES Journal is devoted to the exchange of information in computational electromagnetics, to the advancement of the state of the art, and to the promotion of related technical activities. A primary objective of the information exchange is the elimination of the need to "re-invent the wheel" to solve a previously solved computational problem in electrical engineering, physics, or related fields of study. The ACES Journal welcomes original, previously unpublished papers, relating to applied computational electromagnetics. All papers are refereed. A unique feature of ACES Journal is the publication of unsuccessful efforts in applied computational electromagnetics. Publication of such material provides a means to discuss problem areas in electromagnetic modeling. Manuscripts representing an unsuccessful application or negative result in computational electromagnetics is considered for publication only if a reasonable expectation of success (and a reasonable effort) are reflected. The technical activities promoted by this publication include code validation, performance analysis, and input/output standardization; code or technique optimization and error minimization; innovations in solution technique or in data input/output; identification of new applications for electromagnetics modeling codes and techniques; integration of computational electromagnetics techniques with new computer architectures; and correlation of computational parameters with physical mechanisms.