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

Claim 0:
1. A security sensor comprising a container body and a signal acquisition and processing module housed in the container body, wherein the signal acquisition and processing module comprises:
a piezoelectric transducer configured to convert a mechanical stress to which the piezoelectric transducer is subjected into a first electrical signal;
an accelerometric transducer configured to convert an acceleration to which the accelerometric transducer is subjected into a second electrical signal; and
a processing unit operatively connected to the piezoelectric transducer and to the accelerometric transducer for receiving the first electrical signal and the second electrical signal;
wherein the processing unit is configured to:
process the first electrical signal for obtaining a first flow of digital samples having digital values correlated with an amplitude measurement of the first electrical signal;
process the second electrical signal for obtaining a second flow of digital samples having digital values correlated with an amplitude measurement of the second electrical signal;
process the first flow of digital samples and the second flow of digital samples for obtaining 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
detect an intrusion event and/or an environmental event according to an analysis of the at least one processed flow of digital samples.