Fluid property and flow sensing via a common frequency generator and FFT
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United States of America Patent
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Jan 2, 2001
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N/A
app pub date -
Dec 31, 1997
filing date -
Dec 31, 1997
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Abstract
A method and apparatus for using a common frequency generator for measuring selected properties of a fluid of interest via one or more heater and/or sensor elements. The common frequency generator may sequentially and/or simultaneously provide input signals to selected heater and/or sensor elements. Application of more than one frequency component by the common frequency generator enables the determination of one or more time and/or phase lags more efficiently, especially when using an FFT analysis technique. From the time and/or phase lags, the selected fluid properties including fluid flow speed can be determined.
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