METHOD FOR ADAPTIVE SCANNING OF UNDERLYING SURFACE WITH LASER LOCATOR BEAM IN LOW-ALTITUDE FLIGHT INFORMATION SUPPORT MODE Russian patent published in 2019 - IPC G01C23/00 

FIELD: aviation.

SUBSTANCE: invention relates to aircraft instrumentation and can be used to ensure flight safety at low altitudes. There are known methods of regular scanning, in which the area of formation of a range-of-field field in coordinates of angle-angle coincides with the field of view of the locator and is formed as a result of addition of two motions in coordinates of angle-angle: relatively slow rotation of the base coordinate system along one of the angular coordinates and fast two-dimensional regular periodic movement of the laser locator beam relative to the base coordinate system. Novelty of the proposed method consists in that the range of minimum distances to the underlying surface is set corresponding to the scanning period, flight speed and reliable detection of all possible obstacles, including wires, ropes, and so forth, using technically realizable fragments of scanning trajectory with controlled parameters, which can change configuration of trajectory fragments, including their angular orientation in vertical plane, with multiple realization of fragments during half-period of information update on range field, that is during slow rotation of base coordinate system towards left or right boundary of field of view, in scanning, required parameters of each next track fragment are determined based on results of processing available measurements of angles and distances so that angular orientation of said fragment in vertical plane corresponds to falling of predicted minimum distances in given range of maximum ranges of reliable detection of all possible obstacles, in process of scanning, actuating devices control signals are generated so that trajectory fragments realized at current moment of time have parameters with minimum possible deviations from required parameters, thereby providing during the scanning the negative feedback in the automatic control system of the angular position along the vertical of the lower portions corresponding to the minimum distances on the scanning path, holding these lower sections of the trajectory at such angles of inclination of the probing beam, which correspond to the specified range of maximum distances.

EFFECT: technical result consists in increase of sector of scanning on azimuth, which provides considerably more opportunities with prolongation of safe flight trajectories.

1 cl, 3 dwg