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US 5,689,445 AGranted
Electronic compass and attitude sensing system
AssigneeRowe, Deines Instruments Incorporated
InventorsMark A. Vogt, Blair H. Brumley, Kent L. Deines
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AssigneeRowe, Deines Instruments Incorporated
InventorsMark A. Vogt, Blair H. Brumley, Kent L. Deines
Estimating the term…
An electronic heading and attitude sensing subsystem which is fully integrated with the existing hardware of an acoustic Doppler current profiler (ADCP) oceanographic sonar suite to reduce the size and complexity of the apparatus. The subsystem uses a tri-state drive signal with relaxation periods and integration windows to synchronously drive the fluxgate magnetic sensors while reducing the effects of non-linearities and higher order harmonics which may result in heading errors. The present invention includes an electrolytic tilt sensor device and driving circuit which allow measurement of system vertical orientation without the effects of electrolyte conductivity are described. The present invention further includes methods of system calibration, magnetic perturbation modeling, and heading calculation.
A fluxgate sensor drive and sensing circuit, comprising:
A method of measuring the orientation of a device disposed in a magnetic field, comprising the steps of:
Dependencies are inferred from the claim text.