METHOD OF HYDROPHYSICAL AND GEOPHYSICAL FIELDS ACOUSTIC TOMOGRAPHY IN MARINE ENVIRONMENT Russian patent published in 2016 - IPC G01S15/88 

FIELD: hydrophysics.

SUBSTANCE: invention relates to hydrophysics, geophysics and can be used in solving tasks of hydrophysical and geophysical fields complex monitoring generated by natural and artificial sources, ocean and Earth's crust processes and effects. Such fields are generated by sea objects, dynamic and seismic, as well as synoptic processes and hazardous phenomena. Disclosed method of hydrophysical and geophysical fields acoustic tomography in marine environment, includes placement of monitoring system transmitting and receiving units on opposite boundaries of controlled environment, environment insonation with stable frequency scanning low-frequency signals and formation of nonlinear interaction zone in it and parametric conversion of luminal and measured information waves. Reception, amplification and spectral analysis of nonlinearly converted scanning signals, determination of information waves characteristics in them. Method is characterized by that monitoring system receiving unit is formed as discrete linear antenna, including n elements (acoustic transducers), which are placed horizontally in emitting unit direction. Scanning signals are received by discrete antenna converters, preliminary amplified and transmitted to system receiving channel by means of multicore cable, into their frequency-time scale into high-frequency domain converting unit, then into channel switching and continuous transmission signal formation unit, formed continuous signals are amplified in parametric conversion band, their narrow-band spectra are measured, selected in spectra upper and/or lower side bands, which are generated and presented in 2D and (or) 3D, recorded and hydrophysical and geophysical fields signs and their spatial-time dynamics is determined taking into account of parametric and frequency-time conversion. Besides, number of receiving transducers n in linear receiving antenna is set in amount of 10 articles, and distances between them is half of scanned acoustic wave length. Besides, number of antenna elements n corresponds to receiving scanned signals frequency-time conversion scale. Besides, controlled environment is sounded by stable frequency scanned acoustic signals within range of tens-hundreds Hertz. Besides, operations of measurement and generation of measured fields spectra in 2D and (or) 3D form are synchronized with receiving channels cyclic switching and continuous signal forming mode.

EFFECT: technical result is development of hydrophysical and geophysical fields characteristics in marine environment scanning tracing acoustic tomography technologies, as well as continuous monitoring and control over their space-time dynamics on water areas with length of tens-hundreds of kilometers in frequency range, making hundreds-tens-points of kilohertz, hundreds-tens-points-fractions of Herz.

5 cl, 10 dwg