PROSPECTS FOR THE APPLICATION OF HYDROACOUSTIC SYSTEMS USING PARAMETRIC RADIATION MODE TO MEASURE SEA WAVE CHARACTERISTICS

The analysis of ultrasonic methods for measuring the parameters of sea waves and the technical characteristics of the devices implementing them is carried out. Among the devices, the main attention is paid to the prospect of using a "virtual" parametric transmitting array (PTA) in a new way — as a tool for indirectly assessing the degree of sea surface roughness when measuring hydro conditions in coastal waters. The measurement scheme and methodology, the instrumentation of the measuring installation were opted to calibrate the employed PTA in the range of generated difference frequency waves, as well as to carry out model experiments to study the patterns of ultrasonic field scattering when irradiating several acoustically soft reflector plates with different parameters of the sinusoidal profile of irregularities. Based on the analysis of the results obtained, a method for measuring the parameters of rough sea surface is proposed, for example, for the mode of broadband bistatic irradiation (the oscillator and receiver are spaced apart) with ultrasonic signals from the bottom.