Patent ID: 9658079
Date: 2017-05-23
CPC Classifications: G01C,G01P

Claim:
1. A vehicle accelerometer system for communicating with a navigation device comprising: an accelerometer, wherein the accelerometer is installable in a vehicle; a processor configured to select accelerometer output data items for inclusion in an accelerometer output data set representative of measurements by the accelerometer at a plurality of different vehicle locations, each accelerometer output data item being representative of a respective measurement by the accelerometer while the vehicle is in motion, the processor being configured to select an accelerometer output data item for inclusion in the accelerometer output data set based at least in part on the speed of the vehicle at the time of the accelerometer measurement; and a storage device for storing the accelerometer output data set, wherein the processor is configured to process the accelerometer output data set to determine an orientation output representative of the orientation of the accelerometer with respect to the vehicle, and wherein the orientation output comprises a reference output representative of the output from the accelerometer when the vehicle is on level ground; wherein the processor is configured to correct the accelerometer output data set based on the reference output representative of the orientation of the accelerometer; wherein the processor is configured to communicate the corrected accelerometer output data set to the navigation device.