Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1994-06-13
1995-07-04
Chilcot, Jr., Richard E.
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
327552, G01F 132
Patent
active
054290015
ABSTRACT:
A vortex flow transmitter has a filtering circuit receiving a noise contaminated input signal representative of flow and which has a fundamental frequency varying responsively to flow. The filter filters the input signal using one of a family of HP and LP filter characteristics to produce a filtered signal. The amplitude of the filtered signal is proportional to the density of the fluid. Circuitry calculates mass flow of the fluid based upon amplitude and fundamental frequency of the filter output. The circuitry includes rectifying circuitry, summing circuitry, period counting circuitry, and a microprocessor.
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Chilcot Jr. Richard E.
Patel Harshad
Rosemount Inc.
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