Patent ID: 8423234

Claim:
A device for measuring a movement of a self-guided vehicle, comprising, on-board the vehicle: at least one accelerometer provided with a measurement axis in a longitudinal direction of a main movement of the vehicle, assumed to be rectilinear; a first tachometer provided on a forward axle of the vehicle in the longitudinal direction; a second tachometer provided on a rearward axle of the vehicle in the longitudinal direction; a computing unit connected to receiving measurement signals from said at least one accelerometer, from said first tachometer, and from said second tachometer; and a position measurement system configured to supply, upon detection of an adhesion loss, data of a profile of a trajectory of the vehicle, the data including at least one slope and one turn at each position of the vehicle in motion; said accelerometer configured to provide a measurement of a total acceleration of the vehicle in the longitudinal direction; and a computer configured to process data of the profile of the trajectory and the total acceleration measured by said accelerometer in order to determine a corrected acceleration in a longitudinal direction of effective movement of the vehicle for which the effects of slope and turn are taken into account.