DEVICE FOR LOCALIZATION OF LEAKS IN PRESSURE PIPELINES Russian patent published in 1996 - IPC

FIELD: localization of leaks using acoustic method. SUBSTANCE: each signal converter is made in the form of strip-line filter and binary quantizer connected in series. Member varying the tuning of decay is made in the form of primary decay unit and time decay unit connected with their inputs to outputs of switchgear. Time decay unit is connected to output of last digital filter. Circuit forming set point signals is made in the form of frequency setpoint device, pulse generator, electronic switch, and pulse counter all interconnected in series. Pulse counter output is connected to control unit input. Distance indicator input is connected to control unit output connected with its other output to the second input of time decay unit. Second inputs of the strip-line filters are connected to frequency setpoint device. Output of extremum recorder is connected to the second inputs of level and distance indicator. Input of threshold unit, input of extremum recorder, and the first input of level indicator are connected to output of one binary quantizer, the second input of which is connected to output of time shift discriminator, connected to the second switch input. EFFECT: high detecting efficiency. 1 dwg