Patent ID: 7797137

Claim:
A method for detecting anomalies in a set of signals that normally exhibit analogous behaviour, the method comprising: acquiring a set of signals S i from at least one measurement source, the set of signals S i exhibiting the analogous behaviour; arbitrarily selecting one of the signals S i to be designated as a reference signal S ref , and designating a reference point in time t ref ; comparing each signal S i with a value of the reference signal S ref at the reference point in time t ref ; computing a deviation Dev i between the reference signal S ref at the reference point in time t ref and each one of the acquired signals S i ; and generating a deviation alarm trigger when the deviation Dev i meets a given deviation criteria, whereby a variation of one signal S i from S ref beyond the given deviation criteria is indicative of the anomalies, given the analogous behaviour of the set of signals S 1 .