Doppler shift velocity measuring system with correction factors
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United States of America Patent
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Jul 7, 1998
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N/A
app pub date -
Sep 16, 1996
filing date -
Mar 30, 1992
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Abstract
To determine the average velocity of a fluid stream, an ultrasonic signal is transmitted into the fluid and reflected ultrasonic signal received. The signals are mixed with a frequency of the transmitted ultrasonic signals. A Fourier transform is performed on the signals, the largest coefficient used to normalize the signal and certain of the weighted signals are averaged.
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