METHOD FOR MEASURING VECTOR OF VEHICLE GROUND SPEED Russian patent published in 2018 - IPC G01P3/68 G01S15/58 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring methods, in particular to methods for measuring the track speed of vehicles using the Doppler effect for electromagnetic waves. In the method for measuring the ground speed, in which microwave waves with a wavelength λ₀ radiate from both sides of the vehicle at an angle β to its axis and angle α between the direction of motion and the underlying surface, take reflected waves, extract signals with Doppler frequencies on the mixers between the radiated and received waves, measure these frequencies f_D1 and f_D2, determine the modulus of the mean velocity V in time Δt by the formula V=λ₀(f_D1+f_D2)/4cos(α)cos(β). In addition, the angle of rotation of the vehicle ϕ for the same time by formula ϕ=λ₀(f_D1-f_D2)/4πrcco(α)cos(β) with the width of the vehicle equal to r.

EFFECT: increased accuracy of measuring the ground speed.

1 cl, 3 dwg