PHASE METHOD OF DISTANCE MEASUREMENT Russian patent published in 1994 - IPC

FIELD: distance measurement. SUBSTANCE: for distance measurement by phase method harmonic oscillation is generated, it is phase-keyed by 180 deg forming phase-keyed signal. Probing phase-keyed signal is radiated, reflected phase-keyed signal is received and converted by frequency. Intermediate frequency voltage is extracted, multiplied with probing phase-keyed signal. From obtained oscillation harmonic voltage is isolated and shift between harmonic voltage and voltage of local oscillator is measured. Simultaneously correlation processing of probing and reflected phased-keyed signal is conducted. By maximum value of correlation function time of delay between reflected and probing signals is found. EFFECT: enhanced accuracy of measurement, prevention of ambiguity of distance measurement is achieved. 1 dwg