US 4,050,301 A · Electromagnetic water current meter with synthetic direction field

Abstract

An electromagnetic water current meter has associated therewith apparatus to provide an artificially generated field having a direction of predetermined orientation relative to a known coordinate system. In addition to the conventional signal processing apparatus associated with the electromagnetic water current meter, additional signal processing apparatus is provided to produce signals related to the orthogonal components of the artificial field relative to the unknown orientation of the transducer. Signal responsive means is provided which responds to the electromagnetic water current outputs, as well as to the signals representative of the orthogonal components of the artificial field to produce output signals representative of the flow velocity in a coordinate system determined by the direction of the artificial field.

Claims19

Dependent claims

A device for producing signals representative of orthogonal flow velocity components with reference to a known coordinate system, including an electromagnetic flow transducer, producing signals representative of orthogonal flow velocity components with reference to an unknown coordinate system, which further includes,

an artificial field generator for producing a field with predetermined orientation relative to said known coordinate system,
sensing means, integral with said transducer, for sensing orthogonal components of said field in said unknown coordinate system, and producing signals related thereto,
signal responsive means, responsive to said transducer-produced signals, and to said sensing means-produced signals for providing signals representative of orthogonal flow velocities in said known coordinate systems.

Dependencies are inferred from the claim text.

Electromagnetic water current meter with synthetic direction field

Life of this patent

Electromagnetic water current meter with synthetic direction field

Life of this patent

Abstract

Claims19