Patent ID: 8683874

Claim:
A vortex flow measuring device for effecting at least one of: monitoring and measuring an, at least at times, two or more phase medium flowing in a pipeline, said medium including a first phase and a second phase, said first phase exhibiting a density lower than a density of said second phase and said second phase being distributed as particles and/or droplets in the first phase, said vortex flow measuring device comprising: at least a measuring tube, which can be inserted into a pipeline; a bluff body; a vortex sensor, which responds to pressure fluctuations; an acoustic transducer; and electronics, wherein: said bluff body extends in said measuring tube transversely to a flow direction for providing a flow impediment adapted to enable the medium to flow past on both sides of said bluff body, and said bluff body includes at least two shedding edges for shedding Karman vortices; said vortex sensor, in reference to an installed position, is arranged downstream from said shedding edges and, for detecting a third phase in the form of a wall flow flowing along a tube wall of said measuring tube and for transducing pressure fluctuations into an electrical measurement signal, said vortex sensor includes a sensitive section responding to pressure fluctuations, which is arranged at least partially adjoining the tube wall of said measuring tube; said acoustic transducer is embodied integrally in a component, which protrudes into a flow path within said measuring tube, and said acoustic transducer is adapted to transduce acoustic signals produced by impact of particles and/or droplets on said component into electrical signals; and said electronics is adapted to process said electrical measurement signal and to deduce, upon registering a measurement signal, which is characteristic for an interaction of a wall flow with said sensitive section of said vortex sensor, an existence of said third phase in said measuring tube.