DEVICE FOR DETERMINATION OF EXTERIOR BALLISTIC PARAMETERS OF PROJECTILE ELEMENT WITH THE AID OF PHOTORULES AND LIGHT SCREENS Russian patent published in 2006 - IPC G01P3/68 F42B35/00 

FIELD: determination of exterior ballistic parameters (co-ordinates, velocity and attitude of projectile elements - bullets and shells at a direct fire at vertical obstacles (targets), applicable in experimental determination of the piercing capacity of bullets and shells and the armor quality in the process of their development or check-up at manufacture.

SUBSTANCE: the device has two parallel light screens for determination of the flight velocity and prediction of the nullification time of two pairs of photo rules and readout of information of the first pair of photo rules at the instant of intersection by the center of the projectile element of the light screens of this pair of photo rules and after the outcome of the projectile element from the light screens of the second pair of photo rules from these photo rules. The device provides for measurement of the time moments of entry of the projectile element to the light screens for measurement of the velocity and moments of outcome from them and computation of the time of intersection by the center of the projectile element of the light screens, the use of which at determination of the velocity and co-ordinates of flying-by precludes any errors because of nutation and precession. The co-ordinates of flying-by of the projectile element are determined with the aid of the protractor - base method according to the co-ordinates of the centers of shadows on the second pair of photo rules. The signs of the slopes are determined according the coincides of the co-ordinates of the shadow boundaries on the first and second pairs of the photo rules; the slopes of the axis of the projectile element and the angles of precession and nutation are determined according to the width of the full shadows on the second photo rules, signs of slope, co-ordinates of flying-be with the aid of shadow characteristics (dependences of the width of shadows on the slopes).

EFFECT: simultaneous automatic determination with a high precision of the exterior ballistic parameters of the projectile element: velocity, co-ordinates of flying-by and angles of nutation and precession.

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