METHOD FOR MEASURING INITIAL SPEED OF PROJECTILE Russian patent published in 2020 - IPC G01S13/58 

FIELD: monitoring and measuring equipment.

SUBSTANCE: invention relates to control and measurement equipment and can be used for contactless measurement of initial velocity of projectile, which is one of the most important ballistic characteristics of weapons, having an effect on its combat properties. Method is based on emitting electromagnetic energy in direction of projectile movement, receiving electromagnetic radiation reflected from missile and subsequent processing of Doppler echo signals received by two optical telescopic systems with Doppler frequencies ƒ_d1 and ƒ_d2, wherein angle α between their optical axes is known and unchanged, wherein radiation from each of telescopic systems is summed with laser radiation in two optical mixers, and projectile initial velocity is determined by formula:

where λ₀ is laser wavelength and corresponding frequency ƒ₀; (ƒ₀-ƒ_d1) is the differential radiation frequency after the first mixer; (ƒ₀-ƒ_d2) is the difference frequency of radiation after the second mixer.

EFFECT: method of measuring initial speed of projectile, due to reception of Doppler echo signals by two optical telescopic systems with known and unchanged angle α between their optical axes, eliminates measurement error from angle between trajectory of projectile movement and direction of observation, higher accuracy of measuring initial velocity of projectile.

1 cl, 9 dwg