Patent
Vortex shedding flowmeter
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TLDR
In this paper, a vortex shedding flowmeter is provided with a unitary obstacle element for shedding vortices and response element reacting to forces produced by the shedding Vortices.Abstract:
A vortex shedding flowmeter is provided with a unitary obstacle element for shedding vortices and response element reacting to forces produced by the shedding vortices. A cylindrical element may be used for omni-directional measurement capability, with a pair of strain gauge bridges arranged in quadrature to provide a linearly variable frequency output proportional to flow velocity. Electronic circuitry transforms the frequency signal to an analog amplitude signal proportional to flow velocity. Sample and hold circuitry maintains a stable output under transient loss-of-input signal conditions.read more
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Fluid flow measurement
TL;DR: In this article, an instrument for measuring simultaneously the flow rate and density of a moving fluid includes means for measuring the frequency and amplitude of vortices shed by interaction of the fluid with a bluff body.
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References
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Patent
Sonic velocity sensing
D. Joy Robert,F. Colton Russell +1 more
TL;DR: In this paper, a vortex strut attached to an object is located in the fluid stream so as to generate Karman vortices at a frequency proportional to the relative velocity between the object and the stream.
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Vortex-type flowmeter having strain gauge sensor in an elastic suspension
TL;DR: In this paper, a flowmeter has a conduit forming a passage for the fluid to be measured and an obstacle assembly mounted therein capable of generating strong fluidic oscillations which cause a deflectable section of the assembly to vibrate at a corresponding rate.
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