Aiming system for weapon capable of superelevation

Details Aiming system for weapon capable of superelevation Aiming system for weapon capable of superelevation

F - Mech Eng,Light,Heat,Weapons

41

G

F41G 3/06 (2006.01) F41G 3/16 (2006.01)

Patent

CA 2245406

A weapon which employs superelevation of the barrel, such as a grenade machine gun, comprises a barrel unit and an aiming system mounted upon a support. The aiming system comprises an imaging unit, a display unit for displaying an image of a scene within a field of view of the imaging unit, a rangefinder for measuring the range of a target in the f eld of view of the imaging unit, elevation angle measuring means for providing an elevation signal representing displacement of the imaging unit in elevation relative to the support, and a control computer for superimposing upon the image an aiming reticle and a rangefinder reticle, the former representing an aiming point of the imaging unit and the latter representing an aiming point of the rangefinder. The control computer adjusts the position of the aiming reticle in dependence upon the elevation signal, and stores coordinates for selected positions. The aiming system further comprises a coupling unit having a first part connected to the weapon for rotation in elevation with the barrel unit and a second part connected to the imaging unit. The coupling unit has a first state in which the coupling unit fixes the sight unit relative to the support while allowing elevation of the barrel unit relative thereto and a second state in which the coupling unit entrains the sight to move with the barrel unit relative to the support. A switch controls operation of the coupling unit to select the two states alternatively. The control computer computes a required change in elevation of the barrel unit in dependence upon a range measured by the rangefinder a.nd applies a corresponding offset to the displacement signal so as to displace the aiming reticle relative to the field of view in a direction opposite to the change. Where the offset is sufficient to displace the liming reticle beyond limits in the displayed scene, the control computer may be operable apply a part of the onset to position the aiming reticle adjacent a corresponding edge of the field of view and monitor the remaining offset, restoring movement of the aiming reticle with the weapon barrel unit once the barrel unit has been displaced by an elevation angle greater than said remaining offset. The control unit may change the appearance of the aiming reticle while the aiming point is outside the field of view.

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