HIGH RESOLUTION BATHYMETRIC SONAR SYSTEM AND MEASURING METHOD FOR MEASURING THE PHYSIOGNOMY OF THE SEABED

摘要

The invention relates to a high resolution bathymetric sonar system and measuring method for measuring the physiognomy of the seabed. The system contains underwater electronic section which is installed in the underwater carrier, two sonar arrays installed symmetry on each side of the underwater carrier, and the sonar arrays connected with the underwater electronic section through the cable, the characterize of the system is that the said sonar arrays are consisted of a transmitting linear array which transmits linear frequency modulation signals and three and over three parallel receiving linear arrays which are arranged in same space and made of piezoelectric, wherein the transmitting linear array connects with the terminal of the power amplifier of the transmitter included in the underwater electronic section, the parallel receiving linear arrays connect with the preamplifier of the receiver included in the underwater electronic section, the space between the two adjacent parallel receiving linear arrays is d,λ d ≥ λ/2, wherein λ is the wavelength. It can improve greatly the precision of the bathymetric exactly under the sonar that the physiognomy of the seabed is measured by using this system. It can well detect the seabed by using the seabed automatic measuring of the invention, that is the multiple arrays beam-orientation evaluating technology, cancel the multipath signals and give the precision of the bathymetric and the isobath graphic.