WAY OF MEASURING THE INITIAL VELOCITY OF HIGH-SPEED PROJECTILES WITH A LASER FIBRE-OPTIC SYSTEM Russian patent published in 2023 - IPC G01S17/58 G01P3/36 G01P3/68 

FIELD: testing and measuring equipment.

SUBSTANCE: invention relates to testing and measuring equipment and may be used to perform non-contact measurement of high-speed projectiles muzzle velocity, which is one of the most important ballistic characteristics of a weapon. Method is based on emission of electromagnetic energy in the direction of projectile movement, reception of electromagnetic energy reflected from the projectile by means of two optical telescopic systems, the angle between optical axes of which is known and invariable. Emissions received by each telescopic system with frequencies of (ƒ₀-ƒ_d1) and (ƒ₀-ƒ_d2) are summarized in optical summator and spectral composition of the resultant radiation is determined. The ƒ_d1 and ƒ_d2 Doppler frequencies are determined based on the obtained frequency spectra, from which the initial velocity of the projectile is determined.

EFFECT: invention obtains the signal frequency spectrum without performing analogue signal sampling, and to account for changes in the emission frequency of the single-frequency laser ƒ₀ during its operation.

1 cl, 8 dwg