Electrostatic potential measurement of floating conductive objects: Some theoretical considerations and experimental results

IF 1.9 4区 工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC
Pedro Llovera-Segovia , Philippe Molinié , Vicente Fuster-Roig , Alfredo Quijano-López
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Abstract

The measurement of electrostatic potentials of floating conductive objects can, in principle, be performed by well-known basic experimental setups. Commercial equipment is readily available and the physical principles underlaying the problem are well established. However, electrostatic measurements require special attention, as significant errors can arise from the influence of the measuring setup or the misinterpretation of the results. First, the specificity of the measuring equipment must be well understood such as the difference between field mills, induction probes and feedback probes (also called electrostatic probes). These instruments create specific boundary conditions around the object being measured such as the introduction of grounded planes or the cancellation of the electric field. This influence is particularly significant when measuring floating objects as, for example, belts and suspended or flying objects. Even when results are provided directly in volts, their interpretation varies greatly depending on the instrument used. In the case of the field mills measurements, a calibration must be performed to convert the measured electric field into the potential of the floating object. This calibration is often performed by applying a known potential to the floating object. However, this procedure may introduce errors in the measured values due to the presence of the high voltage cable used to charge the object. We describe some examples of numerical calculations and show some experimental measurements on a levitating object.

Abstract Image

漂浮导电物体的静电势测量:一些理论考虑和实验结果
浮动导电物体静电势的测量原则上可以通过众所周知的基本实验装置来完成。商用设备一应俱全,问题所依据的物理原理也已确立。然而,静电测量需要特别注意,因为测量装置的影响或对结果的误解可能会导致重大误差。首先,必须充分了解测量设备的特殊性,例如场磨、感应探头和反馈探头(也称为静电探头)之间的区别。这些仪器会在被测物体周围产生特定的边界条件,例如引入接地平面或消除电场。这种影响在测量浮动物体(如皮带、悬挂或飞行物体)时尤为明显。即使直接以伏特为单位提供结果,其解释也会因所使用的仪器不同而有很大差异。在场强计测量中,必须进行校准,以便将测量到的电场转换为漂浮物体的电势。校准通常是通过对浮动物体施加已知电势来完成。然而,由于存在用于给物体充电的高压电缆,这一过程可能会给测量值带来误差。我们将介绍一些数值计算的例子,并展示对悬浮物体的一些实验测量结果。
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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来源期刊
Journal of Electrostatics
Journal of Electrostatics 工程技术-工程:电子与电气
CiteScore
4.00
自引率
11.10%
发文量
81
审稿时长
49 days
期刊介绍: The Journal of Electrostatics is the leading forum for publishing research findings that advance knowledge in the field of electrostatics. We invite submissions in the following areas: Electrostatic charge separation processes. Electrostatic manipulation of particles, droplets, and biological cells. Electrostatically driven or controlled fluid flow. Electrostatics in the gas phase.
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