Patent ID: 7684905

Claim:
A system for verifying the integrity of a train having a predetermined length, the system being fitted on-board the train and comprising: a device communicating and synchronizing with a detector of a detection circuit, the detector detecting a presence or absence of a train on the detection circuit; an odometer connected to the communication and synchronization device and having a predetermined uncertainty, the odometer providing a first and second odometric reference at an occupation start time and a leaving time, the occupation start time being when the train occupies the detection circuit and the leaving time being when the train leaves the detection circuit; a first processor calculating the distance traveled by the train between the occupation start time and the leaving time based on a difference between the first and second odometric references; a second processor calculating an estimate of the length of the train, the estimate being equal to the sum of the calculated distance traveled and a length of the detection circuit; and an integrity information mechanism transmitting information indicating the train is complete when the calculated length of the train is greater than the predetermined length of the train less the length of a wagon; wherein, since the odometer has the predetermined uncertainty, the calculated distance traveled is expressed in the form of a confidence interval between a minimum distance and a maximum distance so that a probability that the train has not traveled a distance included in this confidence interval is smaller than a predetermined probability, and the length of the train is calculated as the sum of the minimum distance and the length of the detection circuit.