Electromagnetic flow meter having processing means resolving output data into a non-flow waveform component
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United States of America Patent
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Dec 13, 2005
Grant Date -
Dec 30, 2004
app pub date -
Apr 2, 2004
filing date -
Apr 2, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of obtaining a measure of flow from an electromagnetic flow meter is disclosed. A shaped excitation waveform is applied to the flow meter and an output is received from the meter. The sampled output data from the meter is then resolved into a non-flow waveform component and a flow waveform component to derive a measure of flow. Resolving the data into expected waveform components rather than correlating each frequency component of the sampled output data with a sine wave may allow readings to be obtained without processing each frequency component separately. Also, the method may allow more accurate removal of the non-flow component from the output signal, and may decrease the time delay before the initial reading and allow the use of a greater reading repetition rate.
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