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The precision of the electromagnetic flowmeter (EMF) suffers from the impact of the flow profiles. The typical idea is to construct an ideal magnetic field, in order to make the sensitivity of measurement area to be a constant. In the case of the ideal magnetic field, the potential difference between the two picking-up electrodes is linearly related to the mean velocity of the flow in the pipe, i...
In the paper, the effect of installation angle of electromagnetic flowmeter in the downstream of an elbow upon measurement accuracy is studied. The values of induced voltages are calculated in the cases of different installation angles of electromagnetic flowmeter. Measurement error is introduced as the flow velocity distribution is distorted. In order to obtain the measurement accuracy, the simulated...
The paper presented a method to optimize the excitation coils in the electromagnetic flowmeters (EMFs). The optimized coil size was obtained by minimizing the standard deviation of the induced voltage for different asymmetrical flow profiles. The voltage detected between the two electrodes was calculated based on the weight function. A pair of parameters, i.e. circular span angle and axial length,...
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