Magnetic Circuit of Electromagnetic Flow Meter with Capacitive Electrodes
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Date
2017
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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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Subject(s)
liquid flow measurement, electromagnetic flow meter, capacitive electrodes, magnetic flux density, Ansys Multiphysics
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ISBN
978-1-5090-5582-1