METHOD FOR ROUTE SEARCH AND IDENTIFICATION OF ELECTRIC WIRING DAMAGE POINTS Russian patent published in 2016 - IPC G01R31/08 

FIELD: electricity.

SUBSTANCE: invention is related to route search and identification of electric wiring damage points by an induction method. Essence: the method is implemented by alternating voltage supply to the surveyed line from a generator and detection of a magnetic field by a receiver set to the generator frequency. The generator frequency is essentially higher than the receiver adjustment frequency and defined by the formula F_gen=10×M×F_rec, where M is selected from the number sequence of 2-4-8-16. Output voltage of the generator comes to the line through back-to-back diodes and transistor switches opened in a sequence with the period of T_tr=(2×F_rec)^-1. Bursts of monitoring pulses with an amplitude of 300-800 V, pulse duration of T_pulse=(20×M×F_rec)^-1 with the number of pulse of the same polarity equal to N=5×M and polarity change in each half-period of F_rec. An aerial circuit of the receiver integrates bursts of monitoring pulses coming with the frequency of F_gen and changing polarity with the receiver frequency of F_rec and responses to them as to a low-frequency signal. The efficiency of the method is defined by the fact that the signal in the receiver antenna is increased by K_eff=(10×M)² times and tune-out from interference of the commercial frequency is made.

EFFECT: increased accuracy in search of route and identification of electric wiring damage points.

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