ACOUSTIC ACTIVE AERIAL OBJECTS DETECTION DEVICE Russian patent published in 2020 - IPC G01H11/06 

FIELD: metrology.

SUBSTANCE: invention relates to metrology and can be used for detection of airborne objects, for example small and lightly noisy unmanned aerial vehicles. Device for detecting acoustically active aerial objects includes two acoustic sensors shifted relative to each other along a vertical line, a canopy of soundproof material installed under them, a unit for processing electric signals of acoustic sensors. Unit includes balancing units, inputs connected to sensors, and outputs – to inputs of subtracting device, output of which is connected via strip filter to decision making unit. Said deflector is composed of ascending and descending elements. Bottom parts of the shield elements are located below the lower acoustic sensor. In one version, the soundproof perforated shield has a shape which forms a rectangular or C-shaped contour in a horizontal projection, the end face is fixed on the surface of a flat structure, for example on a wall or a bridge support, on which acoustic sensors are also mounted. In another version, soundproof perforated cap constructs axisymmetric closed circuit and is installed on vertical support passing through center of symmetry of shield, at that acoustic sensors are located on top of support.

EFFECT: technical result is increase in detection range.

3 cl, 4 dwg, 1 tbl