Method for monitoring the operation of a machine generating vibrations and device for the implementation of such a method

A method for monitoring the operation of a machine generating vibrations, comprising:

• a phase of learning the normal operation of the machine comprising the following steps:
• acquiring in a temporal domain a first vibratory signal generated by the machine;
• determining a first vibratory signature corresponding to the first vibratory signal;
• determining a first level of similarity between the first vibratory signature and each of vibratory signatures saved in a knowledge;
• comparing the first level of similarity with a first predetermined threshold;
• when the first level of similarity is less than the first threshold, saving the vibratory signature in the knowledge;
• the steps of the learning phase being periodically repeated so as to constitute the knowledge;
• a monitoring phase comprising the following steps:
• acquiring in the temporal domain a second vibratory signal generated by the machine;
• determining a second vibratory signature corresponding to the second vibratory signal;
• determining a second level of similarity between the second vibratory signature and each of the vibratory signatures saved in the knowledge;
• comparing the second level of similarity with a second predetermined threshold;
• when the second level of similarity is less than the second threshold, generating a warning, the second vibratory signature being considered as indicative of an anomaly;
• the steps of the monitoring phase being periodically repeated;
• the monitoring method passing in an autonomous manner from the learning phase to the monitoring phase when the knowledge is considered as being constituted.