Flow meter
AssigneeABB AB
InventorsDavid Lincoln, Michael Armitage
Life of this patent
Estimating the term…
Abstract
An electromagnetic flow meter for measuring flow rate of a fluid passing therethrough includes a conduit defining a fluid inlet, a fluid outlet and a measuring section positioned between the inlet and the outlet. The flow meter also includes a single coil for generating a magnetic field across the measuring section and electrodes for detecting induced electrical potential due to the fluid passage. The coil may be arranged to surround a section of the measuring section over a segment angle of between 140 and 180 degrees. The electrodes may be positioned so that they are offset from being opposite each other on the centerline of the measuring section, by an offset angle of between 5 degrees and 45 degrees.
Claims50
An electromagnetic flow meter apparatus comprising:
- i) an inlet for receiving fluid flowing along a flow conduit,
- ii) an outlet in fluid communication with said inlet for outputting fluid that flows through the flow meter;
- iii) a measuring section positioned between, and in fluid communication with, said inlet and outlet;
- iv) a single coil positioned adjacent a portion of said measuring section for generating a magnetic field across said measuring section;
- and
- v) electrodes for sensing electric fields generated by fluid flowing through said magnetic field in said measuring section;
- wherein said single coil is positioned to surround a portion of said measuring section and wherein said electrodes are circumferentially offset from being diametrically opposite each other.
A method of manufacturing a flow meter comprising:
- i) providing an inlet for receiving fluid flowing along a flow conduit;
- ii) providing an outlet in fluid communication with said inlet for outputting fluid that flows through the flow meter;
- iii) providing a measuring section positioned between, and in fluid communication with, said inlet and outlet;
- iv) providing a single coil and positioning the single coil adjacent said measuring section for generating a magnetic field across said measuring section;
- v) providing electrodes for sensing electric fields generated by fluid flow through said magnetic field in said measuring section;
- and
- wherein said positioning said single coil positions the single coil to surround a portion of said measuring section and wherein said providing electrodes provides electrodes that are circumferentially offset from being diametrically opposite each other.
Dependencies are inferred from the claim text.