Differential pressure measurement device having a microwave resonator with a flexible member
AssigneeRoxar Flow Measurement AS
InventorsEbbe Gustaf Nyfors, Per Hassel Sørensen
Life of this patent
Estimating the term…
Abstract
A differential pressure (dP) measurement device for use in flow measurement including a first microwave resonator (1) having a flexible or yieldable part or member (4) deformable or yieldable when subject to a differential pressure in such a way as to alter a resonant frequency of said resonator, and an electronic unit (12, 14) which is coupled to the resonator (1), and where the electronic unit is adapted to produce an output depending on a resonant frequency of the resonator (1).
Claims26
A differential pressure (dP) measurement device for flow measurement comprising:
- a microwave resonator including two chambers separated by a flexible or yieldable electrically conductive member, wherein the electrically conductive member flexes or yields when subjected to a differential pressure between the two chambers and a resonant microwave frequency of the resonator is altered by the flexure or yielding of the electrically conductive member;
- each of the two chambers including an opening external to the dP measurement device, wherein the openings provide a differential pressure between the two chambers, and
- an electronic unit including at least one microwave probe coupled to said microwave resonator, said electronic unit producing an output dependent on the resonant microwave frequency of said resonator.
A differential pressure (dP) measurement device comprising:
- a microwave resonator including a first chamber and a second chamber, and an electrically conductive member between the first chamber and the second chamber, the first chamber and the second chamber each have an opening to sense a pressure of a flowing fluid;
- a first microwave probe applies microwave energy to the resonator;
- a second microwave probe senses a microwave resonance of the resonator, wherein the resonance is dependent on a deformation of the electrically conductive member and the deformation of the electrically conductive member is dependent on a pressure difference between the first chamber and the second chamber, and the second microwave probe generates an output signal indicating the microwave resonance.
Dependencies are inferred from the claim text.