| 摘要 |
FIELD: acoustics.SUBSTANCE: invention relates to hydroacoustics, particularly, to passive and active acoustic devices to detect gas leakages from gas lines and technical systems for hydrocarbon production, for location and analysis of natural gas sources under water, as well as for quantitative estimation of outgoing gas volumes at bottom. Hydroacoustic station comprises system for creation narrow-band operating signal to generate excitation signal, frequency thereof corresponds to emission radiation frequency caused by leakage bubble, which implements passive detection of emission resonance radiation of bubbles at moments of their separation from solid surfaces, and, in an active stage, performs focusing of acoustic field on bubble through time reversion and radiation of received emission signals. Identification and location of formed bubbles (location of leakage or natural gas discharge) is performed in control and calculation unit by means of analysis of resonant scattered acoustic signals upon bubble. Detection of leaks and natural gas discharges is based on registration of outgoing gas bubbles, which emit emission signals during separation of solid surface, and represent pulsed signals with monochromatic filling, exponentially damped of amplitude in time, and duration of 5 to 30 field periods.EFFECT: technical result is efficiency of detection, reduced number of false alarms at failures of tightness or destructions in field of monitoring, reliable identification of emission objects, higher accuracy of determining points of gas-fluid flow discharges, as well as determination of quantitative parameters of gas streams in wide concentration range of bubbles with possibility of surveyed processes monitoring in time.3 cl, 10 dwg |
