초록 ▼

The present invention relates to a flow velocity measuring apparatus which provides a distinct, measurable pattern of vortices known as Karman Vortex Generation. The apparatus is arranged to include a plurality of vortex producing obstructions which co-operate to provide a high signal output. The fl

The present invention relates to a flow velocity measuring apparatus which provides a distinct, measurable pattern of vortices known as Karman Vortex Generation. The apparatus is arranged to include a plurality of vortex producing obstructions which co-operate to provide a high signal output. The flowmeter is designed to use a vibration sensor which is accessible from the exterior of the pipe carrying the fluid being measured.

대표청구항 ▼

A flowmeter of the vortex shedding type for a fluid flow conduit comprising a plurality of flow obstruction bodies being contoured to cause fluid flow separation and formation of vortices, means to mount said flow obstruction bodies in said conduit in position spaced from each other in a first direc

A flowmeter of the vortex shedding type for a fluid flow conduit comprising a plurality of flow obstruction bodies being contoured to cause fluid flow separation and formation of vortices, means to mount said flow obstruction bodies in said conduit in position spaced from each other in a first direction transverse to the flow direction, said flow conduit having a cross section dimension in the first direction of “D”, each of said flow obstruction bodies having at least one surface portion generally facing a surface portion of another obstruction body in direction transverse to the flow direction, the spacing of said obstruction bodies being such that vortices formed along one of said facing surface portions affects formation of vortices formed along other of said facing surface portions and reinforces the vortices so formed, and the total width of all flow obstruction bodies in the first direction being not substantially less than 0.2D, and sensor means to sense formation of vortices from at least one flow obstruction body.