FIELD: physics.
SUBSTANCE: device realising the method has a transmitter, first and second receivers, transmission antenna, first and second reception antennae, phase detector, output voltage measuring device, a pipe, probing signal, reflected signal, wet soil layer, synchroniser, driving oscillator, first and second multipliers, first and second narrow-bandpass filters, adder, variable delay line, switch, frequency halver, heterodyne, mixer, intermediate frequency amplifier, amplitude limiter, frequency metre and computer unit.
EFFECT: wider functional capabilities due to determination of depth of a pipeline under a soil layer and rational choice of delay for time gating.
2 cl, 1 dwg
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