Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Reexamination Certificate
2006-05-16
2006-05-16
Patel, Harshad (Department: 2855)
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
C073S597000, C073S610000
Reexamination Certificate
active
07044000
ABSTRACT:
A probe type acoustic transit-time flow sensor has paired transducers arranged to generate quasi-helical acoustic beams making a plurality of reflective contacts with a pipe's interior wall. The transducers in each pair are spaced apart along the flow axis so that transit-time measurements can be used both to measure the internal diameter of the pipe and to determine a flow rate. These measurements are combined to yield a volumetric flow rate. Various numbers of pairs of transducers can be put on a single probe or on multiple probes and used to provide a more accurate representation of a flow profile and therefore a more accurate volumetric flow determination.
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Lynnwood, Lawrence C., Ultrasonic Measurements for Process Control, 1989, pp. 292-294 and related bibligraphic citations, Academic Press Inc., San Diego CA.
Kiewit David
Patel Harshad
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