Method of and device for detecting the presence of a living being of a particular species in a space monitored by a doppler sensor

摘要

The signal delivered by a sensor dopper (1) is treated, after amplification (2), (3) and digitization (4) by: & br / - means (11) determining the overall energy of the digitized signal, & br / - means (13) of the autocorrelation test showing a dominant frequency, & br / - a filter (14) of rejection of this frequency, & br / - of the comparator (15) for the removal of the signals of the energy of less than a threshold, & br / - a filter (17) of insulation of a determined frequency band, & br / - means (19) of intercorrelation with a reference signal stored in memory (32).