APPLIANCE FOR DETECTION AND LOCALIZATION OF ACOUSTIC SIGNALS OF LEAKING OF UNDERGROUND PIPELINES

摘要

An appliance for detection and localization of acoustic signals of leaking of underground pipelines is intended for search of places of pipeline leaking in heating, water supply and canalization networks of city municipal economy. The appliance has sensitive element with amplifier, threshold element, control block of display indicator and display indicator, additionally there are included blocks for calculation of real and imaginary parts of signal spectrum with noise, adder accumulator and square wave generator, block for extraction of square root, divider, control block of display indicator and display indicator. Besides that to appliance are included counter of processing cycles, connected in sequence block for fixation of maximal pip of spectral component of signal and noise mix, multiplication block and threshold element and block for storage of permanent multiplier. Localization of site of leakage is performed through search of maximum of spectral component of leakage signal at fixed number of collection cycles. The appliance provides reliable detection and localization of acoustic signals on background of powerful interference at signal/noise ratio less than 0.1.