Measuring and testing – Navigation – Leeway incidence or side-slip
Patent
1976-05-27
1977-09-27
Ruehl, Charles A.
Measuring and testing
Navigation
Leeway incidence or side-slip
73194EM, G01F 158
Patent
active
040503011
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.
REFERENCES:
patent: 2375227 (1945-05-01), Hillman
patent: 3161047 (1964-12-01), Griswold
patent: 3372585 (1968-03-01), Niskin
patent: 3641816 (1972-02-01), Chambolle et al.
patent: 3937078 (1976-02-01), Williams
Hanff; Michel, Proceedings of the Conference on Electronic Engineering in Ocean Technology, Swansee Wales, UK, (Sept. 21-24, 1970), pp. 371-380.
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