| 摘要 |
<p>A device for detection of intrusions in closed volumes, in particular for passenger compartments of vehicles, comprising a pulse generator (100), to generate a plurality of main pulses (10, 11); a detector (130) to detect a plurality of auxiliary pulses (20, 21) each obtained from the interaction of a respective main pulse (10, 11) with at least one surface or object (2) present in a predetermined closed volume; a comparison module (140) to compare the values of a characteristic parameter of said auxiliary pulses (20, 21) with each other and generate a notification signal (30) as a function of - said comparison. The device (1) further comprises an adjustment module (150) to adjust the time duration of said main pulses (10, 11). It is also described a method of detecting intrusions in closed volumes, in particular for passenger compartments of vehicles.</p> |
