Magnetic circuit of electromagnetic flow meter with capacitive electrodes

2017 IEEE International Workshop of Electronics, Control, Measurement, Signals and their Application to Mechatronics (ECMSM) Pub Date : 2017-05-01 DOI:10.1109/ECMSM.2017.7945903

L. Slavík, M. Novák

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引用次数: 4

Abstract

This paper deals with analysis of magnetic circuit of electromagnetic flow meter with capacitive electrodes. There are several possibilities how to design magnetic circuit for creating preferably homogenous magnetic field with constant magnetic flux density. In the case of electromagnetic flow meter with capacitive electrodes, there is strong requirement to high level and homogeneity of magnetic flux density, because of very low level signal on the capacitive electrodes. One of possibilities how to create strong homogenous magnetic field is to use driving coil with ferrite magnetic circuit. There is analyzed shape and value of magnetic field flux density inside the pipe of designed magnetic circuit and simulated in ANSYS software in this paper. There are also compared characteristics of this design with ferrite circuit with characteristics of magnetic field with classical coils placed directly on the measuring pipe. Evaluated results from simulation software are compared with experimental measurement in final discussion.

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电容式电磁流量计的磁路

本文对电容式电磁流量计的磁路进行了分析。如何设计磁路以产生具有恒定磁通密度的优选均匀磁场有几种可能性。在电容式电磁流量计中，由于电容电极上的电平信号很低，对磁通密度的高电平和均匀性有很强的要求。利用带铁氧体磁路的驱动线圈产生强均匀磁场是一种可行的方法。本文对所设计的磁路管道内磁场磁通密度的形状和数值进行了分析，并在ANSYS软件中进行了仿真。并将该设计与直接放置在测量管上的具有磁场特性的铁氧体电路的特性进行了比较。最后讨论了仿真软件的评估结果与实验测量结果的比较。

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

2017 IEEE International Workshop of Electronics, Control, Measurement, Signals and their Application to Mechatronics (ECMSM)

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