Karman vortex flow meter
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United States of America Patent
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-
May 29, 2001
Grant Date -
N/A
app pub date -
Sep 3, 1998
filing date -
Nov 11, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Karman vortex flowmeter includes a vortex generator 2 provided in a tube-like flow passage 1a, a vortex detector 4 having a piezoelectric element 6 embedded in an elastic sheath 5 having a pressure receiving wing piece 5a, spaced apart by a prescribed distance from the vortex generator, downstream of the flow passage. The vortex detector includes the pressure receiving wing piece of a square plate, and a piezoelectric element accommodating portion 5c of a circular cylinder having a larger outer diameter than the pressure receiving wing piece. The pressure receiving wing piece protrudes from an end face 5c of the piezoelectric element accommodating portion. In this configuration, a Karman vortex flowmeter with high accuracy can be provided in which the detector itself generate no vortex and can detect vortexes stably.
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