Electromagnetic flow meter
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United States of America Patent
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Nov 8, 2005
Grant Date -
Dec 23, 2004
app pub date -
Apr 2, 2004
filing date -
Apr 2, 2003
priority date (Note) -
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status (Latency Note)
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Abstract
There is described herein a method of obtaining a measure of flow from an electromagnetic flow meter having at least one field generating coil and potential sensing electrodes. A composite excitation waveform is applied to the field-generating coil. The composite excitation waveform comprises at least two frequency components and a plurality of frequency components are simultaneously present for at least a portion of the waveform. The potential sensed by the potential sensing electrodes is sampled to produce a sampled output and the sampled output is correlated with a composite waveform based on the composite excitation waveform. The result of the correlating is used to derive a measure of flow.
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