Abstract: Method of ingress or egress intrusion detection by ultrasound surveillance throughout volumetric multi-area room around a protected object, where the surveyed room is arranged in juxtaposed volumetric closed or open areas that represent central, short-range and long-range echelons of defense-in-depth intrusion protection infrastructure. The used techniques of ultrasound intrusion detection are based on the phenomena of reflection, refraction by edge diffraction, and interference by shadowing of ultrasonic beams. The ultrasonic beam patterns are closely disposed in 2-D curvilinear or polygonal array, or in 3-D curved surface lattice over multilevel substantial openwork frames of different echelons. The informational and processing inter-echelon interrelation is being treated by control software algorithm that features situational logic transition driven by IF-THEN operator.

Abstract: Method of ultrasound intrusion detection is disclosed wherein the ultrasound multi-area volumetric surveillance is being organized to meet properly the correspondent requirements for the defense-in-depth protection of critical objects. All the room around a protected object is being purposely arranged in juxtaposed volumetric areas, which areas are closed or open and do represent respectively the central, short-range and long-range echelons of an entire defense-in-depth protection space. The pertain method of ultrasound detection of either ingress or aggress hazardous intrusion is being realized in each adjacent echelon regarding the specific task, which this very echelon has been commissioned with.