Patent ID: 8762091
Filing Date: 2014-06-24
Classification: G01C,G01P

Abstract:
1. An apparatus for measuring an inertial property on a set of one or more axes, comprising: a. a first inertial sensor arranged to measure said inertial property, having a first predetermined resolution and a first predetermined measurement range; b. a second inertial sensor arranged to measure said inertial property, having a second predetermined resolution and a second predetermined measurement range, wherein the second resolution is coarser than the first and the second measurement range is larger than the first; and c. a processing system; wherein the processing system is configured to receive measurement signals from said first and second inertial sensors and, when the output of the first inertial sensor is within the first predetermined measurement range, to update an error estimate for adjusting the output of the second inertial sensor, based on the measurement signals from said first and second inertial sensors; and wherein the processing system is configured to compute the inertial property using the output of the first inertial sensor when that output is within the first predetermined measurement range and using the adjusted output of the second inertial sensor when the output of the first inertial sensor is not within the first predetermined measurement range.