Signal discriminating method and device for detecting intrusion into premises

Abstract

The invention concerns a method for discriminating between signals generated by means sensitive to variations in the pressure of a gaseous fluid. This method is characterized in that, in order to discriminate between electrical signals, it operates as follows: when a means (5) sensitive to pressure variations generates an electrical signal, the evolution of the amplitude of at least one characteristic of this signal is monitored and, when two successive amplitude variations (A1, A2) substantially opposite relative to a median value (M) are detected, a means (6) for informing people is inhibited, whereas when amplitude variations of a different type are detected, the means (6) for informing people is activated.

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