Patent ID: 7463952

Claim:
A method of processing measurement signals from a movement sensor ( 2 ) on board a motor vehicle, the method comprising the steps of: in a preliminary phase: measuring, with the vehicle stopped, a reference value (AcOFF) of a signal output by the movement sensor ( 2 ), and storing said measured reference value as an offset value; by an acceleration value (Sa) determining a running threshold of the motor vehicle and fixing and storing the running threshold; and storing a noise value (Bb), the noise value being characteristic of operation of the movement sensor ( 2 ) and representative of white noise of the movement sensor ( 2 ); and then, throughout the life of the vehicle: measuring the movement sensor signal output by executing sequences of a quantity n of successive measurements of the signal output, to produce a corresponding n successive measured values for each sequence, wherein, for each sequence, i) the stored offset value is subtracted from each of the n successive measured values of each sequence to produce n calculated values, ii) each of the n calculated values is compared with the stored running threshold, and iii) information representative of a stopped state of the vehicle is transmitted if, and only if, the n calculated values are all less than the stored running threshold, and the n calculated values are each equal to each other within a tolerance margin corresponding to the stored noise value.