Doppler measurement instrument and doppler measurement processing method
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United States of America Patent
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Apr 18, 2017
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app pub date -
Aug 8, 2012
filing date -
Aug 8, 2011
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Abstract
A fluid flow measurement instrument is provided. The measurement instrument includes a sensor producing a time domain signal representative of reflections of an emitted signal; and a meter being coupled to the sensor and configured to: receive the time domain signal; create two or more spectral estimates for the time domain signal, wherein said two or more spectral estimates have different frequency ranges and resolutions; determine a frequency offset value using one or more of the two or more spectral estimates; and convert the frequency offset value into a fluid velocity. Other aspects are described and claimed.
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