METHOD OF DETERMINATION OF ACCURACY OF FIRE OF SHOT-GUNS Russian patent published in 2003 - IPC

FIELD: shooting equipment, in particular, technique of determination of accuracy of fire of shot-guns. SUBSTANCE: a shot is fires from the shot-gun on a target to the point of aim, a mark of aim is used for the purpose. Then optical signals are converted into electric ones by a matrix photodetector. The electric signals of the photodetector are stored. The photodetector signals are read out and transformed to a digital code proportional to the value of the electric signal and stored in the form of a two-dimensional data file corresponding to the matrix of the photodetectors. The coded signals of the photodetectors are compared with the upper of two threshold values and a decision on belonging if the signal to one of three possible types of the target sections is taken, in particular, to the shot mark, non-affected target section or mark for aiming, at an excess of the upper threshold value, if according to the priori data the mean brightness of the target section of this type exceeds the mean brightness of the target sections of the two other types, and at a non-excess of the upper threshold value, the coded signal is compared with the lower threshold value, and a decision is taken on belonging of the signal to one of the two target sections of other types according to non-excess of the lower threshold value. If according to the priori data, the mean brightness of the target section of this type is less than the mean brightness of the rest target sections, the numbers of the lines and columns of the data file elements with the codes of the signals of the shot marks and code of the mark signal for aiming are stored, in the digital view the coordinates of the shot marks and marks for aiming in the plane of the target are determined. The coordinates of the center of shot shattering are determined by summation of the coordinates of the center of shot shattering in axis of coordinates with a subsequent division of the sum by the total number of the shot marks, and the accuracy of the shot is determined as a deviation of the center of the shot shattering center from the mark for aiming. As the parameters for determining the deflection of the shot shattering center from the mark for aiming the differences of their coordinates in each axis of coordinates are used. EFFECT: reduced labor content of determination and enhanced its accuracy. 2 cl, 3 dwg