Patent RU-2695141-C2 (RU)
Title: Method of automatic adjustment of zero lines of sighting of optoelectronic channels of sighting of armored vehicles
Inventor: Zubar Aleksej Vladimirovich
IPC: F41G3/32
Filed: 2018-10-22
Granted: 2019-07-22
Abstract: FIELD: military equipment. 
     SUBSTANCE: invention relates to armored weapons and can be used to automate the alignment of sighting lines of sighting of armored weapon pieces with weapons on tanks, infantry combat vehicles, artillery systems and ground-based robotic, including autonomous and remotely controlled reconnaissance-strike complexes for military purposes. For automatic alignment of zero aiming lines of optical-electronic channels of sighting, real axis of the barrel of the weapon is directed to a remote point or a reference test target – RTT. Sighting axes of the scopes are aligned with the real axis of the barrel bore at points located at the range of alignment set on the basis of effective firing distance for each sight separately. At that, in order to determine the direction of the real axis of the barrel channel, a digital video camera fixed on the muzzle face or breech end of the barrel channel is used so that the real axis of the barrel channel and the optical axis of the camera lens are parallel, and the optical centre of its lens was at the level of the gun barrel channel cut. According to the technical parameters of the gun chamber and the optoelectronic parts – cameras of the scanned sights, the matrixes of their internal parameters are calculated. Digital images are received from the scopes and gun used for adjustment of cameras. In the field of view of one of the scopes using the built-in algorithms an object (P) or a section of the area is selected, according to which the reconciliation will be performed. Range to object (P) is measured with standard range-finder or mode of automatic adjustment by RTT. At that, on RTT first, clearly marked markers in the form of geometrical primitives are made at a fixed distance at an arbitrary distance before the combat vehicle with simultaneous visibility of the gun camera and the cameras of the scanned sights. Distance to RTT relative to optical centre of camera lens. Forming the vector of its position and the corrected coordinates for each detected in the marker image. Initial coordinates of the central sighting marks (except for the gun camera) are read from the images of the scanner cameras in the pixel coordinate system from which extended vectors of the initial position of the central sighting marks are recorded. Image is cropped to align the area enveloped by the frame. Its resolution is enabled to resolve the gun camera image. Method includes searching for images of an object (P) on a gun camera image and when a search is completed around the found object images (P) on the gun camera image, forming a corresponding grip frame (R P. ) on gun camera image, calculating coordinates of point (s P ) of frame centre (R P ) relative to geometric centre of image (O P   Img ). For point (s P ) position vector is recorded, vector of coordinates is calculated, values of angles of deviation of the actual axis of the channel of the weapon barrel, in vertical and horizontal planes, from direction to object (P) are calculated. After gun guidance is completed, moment is taken when point (s P ) on gun camera image coincides with image centre (O P   Img ), and its first and second coordinates on the image become zero. Upon completion of guidance, guidance drives are stopped and angles values are transmitted for further conversion to guidance signals for drives of vertical and horizontal guiding of combat vehicle stabilizer. First and second coordinates of correction vectors for the scanned sights are calculated. Coordinates of central sighting marks corresponding to factory requirements on ranges of alignment are calculated on images of reconcilable scopes. Central sighting marks of the scanned sights are moved to the calculated positions. 
     EFFECT: higher accuracy of alignment of scopes, reduced time spent and eliminated possibility of influencing the process of alignment of subjective errors peculiar to a person, possibility of performing alignment at any remote point and at randomly located RTT. 
     1 cl, 10 dwg