MEASUREMENT SYSTEM FOR MEASURING A FLOW PARAMETER OF A FLUID FLOWING IN A PIPE
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United States of America
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Issued Date -
Feb 24, 2022
app pub date -
Nov 13, 2019
filing date -
Nov 13, 2019
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Abstract
A measurement system includes: a tube; a bluff body, situated in the lumen of the tube, for generating vortices in a flowing fluid such that a Kármán vortex street is formed downstream of the bluff body; a vortex sensor, having a mechanical resonant frequency, for providing a vortex sensor signal which changes over time and contains a first component representing the vortex shedding frequency and which contains a second component representing the mechanical resonant frequency of the vortex sensor; and transducer electronics for evaluating the at least one vortex sensor signal and configured to do the following: to determine vortex frequency measurement values representing the shedding frequency using the first component and, if the first component is not present, not to provide such flow parameter measurement values and to generate a message indicating the current flow speed is not lower than the current acoustic velocity of the flowing fluid.
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