Patent ID: 8756026

Claim:
A monitoring process of a machine comprising moving pieces, a lubrication system and an electromagnetic sensor fitted with a magnet and two electrodes, said sensor being capable of collecting particles present in the lubrication system between said electrodes, the monitoring process comprising: acquiring, using a processor of a computer, measurements of resistance between the electrodes of the sensor, made during an operating period of the machine; determining, using the processor of the computer, from said measurements a first autoregressive mathematical model characterizing said resistance; comparing, using the processor of the computer, the first model and a predetermined reference model of resistance during a normal use phase of the machine, the reference model being stored in a memory of the computer, and the comparing comprising calculating a Euclidean distance between the first model and the reference model; and forming an opinion on maintenance of the machine as a function of the comparison result using the processor of the computer, in which a positive opinion on maintenance is provided if said Euclidean distance is greater than a predefined threshold.