Portable Multi-beam Underwater Terrain Detection Sonar System

Underwater acoustic has been used in military for almost one hundred years. With the rapid development of information science and electronic technical, sonar system was hardware realized by subsystem and digital signal processors, expert system software was also available. It was a benefit try to apply underwater acoustic on underwater terrain survey for aerial sonar research and development center. It was also the purpose of this thesis.Portable multiple beam sonar system is mainly used to survey the underwater terrain of huge reservoir. Firstly, the thesis introduces the index of performance. Secondly, it explains the ranging principle of sonar system, and simulates the processing procedure on computer, gives the beam pattern. The thesis focuses on the schematic design and hardware implementation of digital signal processing module. At the same time, it gives the design consideration and signal processing flow diagram. Finally, the thesis describes the Visual C++ software programming of computer interface, and the interface specification between analog preprocessing module and digital signal processing module.The multiple beam sonar system for terrain survey has met the system's requirement via the results of pool static experiments.