Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1987-12-04
1989-09-12
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
G01F 132
Patent
active
048648680
ABSTRACT:
A vortex flowmeter including a differential pressure transducer with high common mode rejection. No diaphragms are required. A relatively thick machined recess at one end of the vortex shedding body concentrates and transmits the vortex shedding differential pressure to strain transducers located outside the fluid flow conduit. Embodiments are disclosed in which piezoelectric elements and reflective optical fibers are used as strain transducers. The described arrangements allow the mechanical clamping of the transducers and their removal without a flow shut down. The shedder shape is optimized in relation to the differential transducer to strengthen the shed vortices and improve the linearity and repeatability of the meter.
REFERENCES:
patent: 3564915 (1971-02-01), Tomota et al.
patent: 4197739 (1980-04-01), Frick
patent: 4248098 (1981-02-01), Sawayama et al.
patent: 4440027 (1984-04-01), Focht
patent: 4448081 (1984-09-01), Kolitsch
patent: 4699012 (1987-10-01), Lew et al.
patent: 4703659 (1987-11-01), Lew et al.
Gaudier Dale V.
Goldstein Herbert
Schlumberger Industries Inc.
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