Data processing: measuring – calibrating – or testing – Measurement system – Accelerometer
Reexamination Certificate
2007-09-18
2010-11-02
Wachsman, Hal D (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system
Accelerometer
C702S085000, C702S092000, C033S356000, C033S352000
Reexamination Certificate
active
07826999
ABSTRACT:
The instant invention utilizes two, optionally orthogonal and optionally slightly tilted, horizontal magnetic sensors and, optionally, a 2 or 3 axis accelerometer or inclinometer to calculate a pitch, roll and tilt compensated heading. A vertical, Z, component is relatively constant compared to X and Y components, the Z component can be abstracted from the X and Y sensor when pitch and roll is applied based on Z offset measured with X or Y sensor at high tilt angles. Additional sensors tilted at various θ degrees can be added with a different angle α to X sensors when additional horizontal and magnetic coverage is desirable.
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Boeen Anders
Figaro Davy J.
Taylor Andrew T.
Fernandez & Associates LLP
PNI Corporation
Wachsman Hal D
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