Grekov A. Development of acoustic time-difference-methods and control the dynamics of natural waters

The thesis is devoted to research of development of acoustic time-difference-methods and control the dynamics of natural waters. Acoustic methods are analyzed and controls the flow velocity and acoustic controls the parameters of surface waves. Improved acoustic differential-time method of measuring the flow velocity, which compensated for the hardware latency, and is determined by the speed of sound. On the basis of an improved method designed and developed the instrument control the flow velocity. The analysis of the shortcomings of an acoustic Doppler Current Profiler and developed a method for controlling the sound speed profile and velocity profile using stationary devices, devoid of these shortcomings. Established its mathematical model. According to the results of experimental studies of spectral characteristics of the pulsations of the flow velocity is proposed, studied and implemented an acoustic method to control the flow velocity on the dispersion of the spectrum of velocity fluctuations. Improved method of "speed-rate", designed and developed a universal acoustic instrument, which provides control flow rate, level and parameters of surface waves. Laboratory and field tests of all the created devices.