G - Physics – 01 – F
Patent
G - Physics
01
F
73/125, 73/60, 7
G01F 1/32 (2006.01)
Patent
CA 1189349
-18- ABSTRACT In a vortex flow meter for measuring a varying flow rate of a fluid through a conduit, an oscillation compensating apparatus is constructed to remove undesirable externally derived oscillation noise which is applied to the flow meter. An elongate vortex shedding member extends into the conduit through part of its wall. The shedding member forms a shedding portion inside the conduit and a compensating portion outside the conduit. The shedding portion carries a first oscillation sensor therewith and the compensating portion, a second oscillation sensor. The first sensor is sensitive to an oscillation component caused in the shedding portion by a vortex train shed in the conduit, and an externally derived oscillation noise component. The second sensor is sensitive to the noise component only. All these sensed components are combined to cancel the oscillation noise so that only the oscillation component in the shed- ding portion is picked up.
432864
Oval Engineering Co. Ltd.
Robic Robic & Associes/associates
LandOfFree
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