METHOD FOR DETECTION OF TSUNAMI DANGER EXTENT AND DEVICE FOR ITS REALISATION Russian patent published in 2009 - IPC G01V9/00 

FIELD: physics, measurement.

SUBSTANCE: inventions are related to the field of seismology and may be used for warning about tsunami waves. Device that realises suggested method comprises surface station for reception and processing of signals, communications satellite - retransmitter, radio buoy and registration device. Method is realised in the following manner: groups of registration devices are installed in coastal area, connected to surface stations for reception and processing of signals. High-frequency oscillation is generated on radio buoy and manipulated by phase with the help of modulating code. Generated complex signal with phase manipulation is amplified in power and radiated into environment. On surface station for reception and processing of signals received complex signal with phase manipulation is transformed by frequency. Complex signal with phase manipulation is separated on intermediate frequency, and its phase is doubled. Spectrum width of received signal with phase manipulation of intermediate frequency and its second harmonics is measured and compared. In case of significant difference, synchronous detection of received signal with phase manipulation of intermediate frequency is done. Low-frequency voltage is separated, which is proportional to modulating code, and it is registered. At that reference voltage required for synchronous detection of received signal with phase manipulation of intermediate frequency is generated by separation of the second harmonics of received signal with phase manipulation of intermediate frequency, by division of its phase by two and separation of harmonic voltage of intermediate frequency. Judgement on extent of tsunami danger is made whenever radiated signal has exceeded three threshold levels: "dangerous", "very dangerous", "extremely dangerous".

EFFECT: higher validity of detection.

2 cl, 6 dwg