Patent ID: 11908295
Assignee: DEA SECURITY S.R.L.
Field: Control (Instruments)
Classification: CPC G | IPC G

Claim 11:
12. A method for detecting an intrusion event and/or an environmental event by at least one security sensor comprising a piezoelectric transducer, an accelerometric transducer and a processing unit operatively connected to the piezoelectric transducer and to the accelerometric transducer, wherein the method comprises:
converting a mechanical stress to which the piezoelectric transducer is subjected into a first electrical signal;
converting an acceleration to which the accelerometric transducer is subjected into a second electrical signal;
providing the processing unit with the first electrical signal and the second electrical signal;
processing the first electrical signal to obtain a first flow of digital samples having digital values correlated with an amplitude measurement of the first electrical signal;
processing the second electrical signal to obtain a second flow of digital samples having digital values correlated with an amplitude measurement of the second electrical signal;
processing the first flow of digital samples and the second flow of digital samples to obtain at least one processed flow of digital samples therefrom, wherein each digital sample of the at least one processed flow of digital samples has a digital value obtained according to a respective digital sample of the first flow of digital samples and a respective digital sample of the second flow of digital samples by a calculation function F which applies a weighting coefficient to at least one of the respective digital sample of the first flow of digital samples and the respective digital sample of the second flow of digital samples; and
detecting an intrusion event and/or an environmental event underway according to an analysis of the at least one processed flow of digital samples.