Patent ID: 8589015
Filing Date: 2013-11-19
Classification: G01C,G01P

Abstract:
1. A method of calibrating a tri-axial accelerometer that provides uncalibrated outputs for X, Y and Z Cartesian axes resident in a locator that is installed on a mobile asset, comprising the steps of: a) obtaining the uncalibrated X, V, and Z axes accelerometer output data; b) determining, via a processor, in two phases and in at least one of auto and self calibration modes a coordinate transform T that is appropriate for the tri-axial orientation of the accelerometer relative to the frame of reference of the mobile asset, wherein: c) applying said transform T to said uncalibrated X, Y, and Z axes accelerometer output data to obtain calibrated X, Y, and Z axes accelerometer data; and d) removing from acceleration data, an offset created by gravity when the mobile asset is moving on a sloped terrain, comprising the steps of: