Patent ID: 6449858
Filing Date: 2002-09-17
Classification: G01C

Abstract:
A two-axis angle sensor comprisinga first bubble chamber containing two fluids of different characteristics such that a bubble is formed in the chamber; a first bubble detector for generating a signal indicative of the orientation of the first bubble chamber with respect to a first detector axis by sensing the position of the bubble in the first bubble chamber; a second bubble chamber containing two fluids of different characteristics such that a bubble is formed in the chamber; a second bubble detector for generating a signal indicative of the orientation of the second bubble chamber with respect to a second detector axis by sensing the position of the bubble in the second bubble chamber; and a processor for calculating the angle of the sensor with respect to first and second measurement axes by combining the signals from the first and second bubble detectors in accordance with a predetermined algorithm, wherein the measurement axes are angularly offset from the detector axes.