METHOD FOR DETERMINING THE DISTANCE TO INHOMOGENEITY OR DAMAGE OF A TWO-WIRE LINE BY ITS REFLECTOGRAM Russian patent published in 2018 - IPC G01R31/11 

FIELD: electrical engineering.

SUBSTANCE: invention relates to electrical engineering, in particular to methods for determining the location of inhomogeneities in two-wire lines, and is intended for use with pulse devices (reflectometers). Essence of the claimed solution lies in the fact that in the claimed solution it is possible to determine the distance to the inhomogeneity or damage of the two-wire line according to its reflectogram, at which the value of the velocity factor k_v is set in the reflectometer, known or calculated from k_v=c⋅τ_z, and some duration of the probing pulse t_p, the reflectogram is registered, a pulse reflected from the inhomogeneity or damage is detected on it and the distance l_{d exp} up to the leading edge of the detected pulse is determined, differs in the fact, that after the detection of the pulse reflected from the inhomogeneity, the distance l_{d max} up to the top of the reflected pulse, is measured on a scale (or by means of a cursor), after which the l_{d exp} by numerical solution of the equation is determined: where τ_z – the specific signal time delay, τ₀ – a constructive const of the two-wire line, t_p – the duration of the probing pulse, Q=1.371 is the approximation coefficient.

EFFECT: increase in the accuracy of determining the distance to the inhomogeneity (damage) in the two-wire line from its reflectogram.

1 cl, 6 dwg, 3 tbl