POLARIZATION METHOD FOR DETERMINING THE INITIAL VELOCITY OF A SHELL FROM A RIFLED ARTILLERY PIECE Russian patent published in 2023 - IPC G01S13/58 G01P3/36 

FIELD: instrumentation.

SUBSTANCE: invention can be used for non-contact measurement of the angular velocity of rotation and the initial velocity of the projectile. In the claimed method, electromagnetic radiation is directed to a corner reflector, in front of which a polarizer of the polarization plane is located, while the reflector and polarizer are placed in the rear part of the projectile. The radiation reflected from the corner reflector and secondarily transmitted through the polarization plane polarizer is directed to the polarization plane analyser located in the receiving telescopic system. Next, the radiation is converted into an electrical signal, the frequency of theω variable component of the electrical signal is measured. The angular velocity of the projectile is calculated from the frequency of the signal Ω=ω/2 and its initial speed , where d - barrel calibre, α - the angle of inclination of the barrel rifling at the muzzle of the gun barrel.

EFFECT: increased accuracy of measuring the angular velocity of rotation and the initial velocity of the projectile.

1 cl, 3 dwg