| 摘要 |
The invention relates to hydro-acoustics and can be used for remote monitoring of sea bed and study of the structure of bottom sediments. A profilograph comprises a transmitting two-frequency parametric antenna, transmitting sections with the first and the second working frequencies, probing pulse formers with the first and the second bearing frequencies, frequency divider, high-frequency generator of the signal of reference frequency, generator of video-pulses, receiving low-frequency antenna, receiving section, device for information processing, device for representation of information, control device, and additionally to two-channel parametric profilograph operating by principle of parametric separation in water medium of the differential frequency of two high-frequency signals f= f–f, frequency divider with division coefficient n= f/ fand phase collector are included, those provide formation of additional in-phase low-frequency spectral components at radiation. The invention provides the increase of effectiveness of parametric conversion of electric energy to low-frequency emitted energy. |
