Spectral diagnostics in a magnetic flow meter
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United States of America Patent
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-
Sep 2, 2003
Issued Date -
N/A
app pub date -
May 23, 2000
filing date -
Dec 10, 1998
priority date (Note) -
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Abstract
A magnetic flow transmitter provides a coil driver output at a selected fundamental to a coil on a flow tube carrying a flow of a liquid. An amplifier amplifies an electrode signal from the flow tube and an A/D converter converts the amplified electrode signal. A digital signal processor (DSP) uses a spectral transform such as a Fourier type transform to generate a flow output based on spectral components at or near the fundamental and a noise diagnosing output based on components at or near a noise frequency.
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