Patent ID: 9228836
Filing Date: 2016-01-05
CPC Classification: G01C,G01P

Claim Text:
1. A method comprising inferring vehicular trajectory characteristics, said inferring comprising: acquiring using a machine-implemented processor data representing a sequence of measurements of acceleration of a device traveling in a vehicle traversing a road network, the device being in an unknown and changeable orientation relative to the frame of reference of the vehicle in which the device is traveling; forming during traversal of the road network by the vehicle using a machine-implemented processor associated with the device in the vehicle a plurality of time segments of the measurements of acceleration, wherein the orientation of the device relative to the vehicle when acquiring the data differs between at least some of the time segments and wherein forming the plurality of time segments comprises detecting times of substantial relative motion of the device relative to the vehicle, and forming the time segments between said detected times; for each time segment of a plurality of time segments, using a machine-implemented processor, providing data characterizing trajectory characteristic of the vehicle determined from the data characterizing the trajectory characteristics in multiple of the time segments.