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AssigneeFlowtec AG
InventorsMichael Lang, Jaime Donoso
Estimating the term…
In the method for mass flow measurement by the Coriolis principle a fluid-traversed elastically deformable measuring tube is periodically deflected. As a measure of the mass flow phase displacements are measured between deflections of portions of the measuring tube wall which are arranged differently in the flow direction. For this purpose a periodic deformation of the cross-section of the measuring tube is effected in such a manner that portions of the measuring tube wall lying diametrically opposite each other are deflected in each case through about the same distance in opposite or the same direction transversely of the flow direction of the fluid. This method can be carried out with a simply constructed mass flow meter in the operation of which a wandering of the center of gravity of the meter is substantially avoided and which is also suitable for large nominal widths.
A method for mass flow measurement according to the Coriolis principle by means of an elastically deformable measuring tube through which a fluid flows, said method comprising the steps of effecting a periodic deformation of a cross-section of the measuring tube with an exciter in such a manner that portions of the measuring tube wall which lie diametrically opposite each other are radially deflected through substantially equal distances in the same direction or in opposite directions transversely of the flow direction of the fluid, detecting the tube wall deflections at locations on the measuring tube axially displaced from the exciter, and measuring the phase difference between the detected tube wall deflections which phase difference is indicative of the mass flow of the fluid.
A Coriolis-type mass flow meter comprising a measuring tube adapted to be inserted in a fluid conduit, at least one oscillation exciter which acts on the measuring tube to produce a periodic deformation of a cross-section of the measuring tube wall in such a manner that portions of the measuring tube wall which lie diametrically opposite each other are radially deflected through substantially equal distances in the same direction or in opposite directions, and a phase detector system comprising sensor means for detecting the tube wall deflections at locations on the measuring tube which are axially displaced from the exciter and means for measuring the phase difference between said detected tube wall deflections.
Dependencies are inferred from the claim text.