| 摘要 |
Detection of an intruder includes providing a sensor which senses an action generated by an intruder and produces a signal, determining portions of the signal from individual steps and making values of the signal with this portion closer to one another, determining a main amplitude threshold, obtaining an enveloping line of initial data of the signal, determining maximum values of amplitudes of the enveloping line and time points corresponding to the maximum amplitudes, determining an average value of time intervals between neighboring maximums of amplitudes and an average square value of the intervals of an average value, making more accurate the average value of time intervals between neighboring maximums of amplitudes of the enveloping line and average squared deviation of the time intervals from an average value, as well as other parameters, and making a decision about a presence of an intruder from the thusly determined parameters.
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