Design Of Hardware Platform For Underwater Target Echo Simulation

The competition in the Marine field is more intense among countries in the world,and the intelligent Marine military equipment has emerged one after another.Passive sonar is more difficult in the field of anti-submarine detection,and the collaborative work of multi-platform sonar has become a hot direction of underwater acoustic research.Take the initiative to launch system this paper designed a model can be assisted simulated target echo signal hardware platform,the underwater acoustic signal hardware platform is different from general analog device,can provide the operator with a visual interface,8 array yuan receive different directions active signal decoding precision of time delay and amplitude,the original data can be read in real time analysis of 32 road,flexible and easily change the launch parameters to adapt to the needs of different test environment.In this paper,the FZ3 A development board,which has both FPGA and ARM functions,can greatly improve the system performance,DSP TMS320C6678 as a signal processor,the upper computer display and control to observe the real-time processing results,so as to design a 32-channel target echo simulation system.The hardware platform consists of two parts,collection and launch,through analog receiver circuit is responsible for underwater acoustic signal amplifying,filtering,isolation,etc.,signal acquisition module completed on 16 quantitative conversion of the analog signal into digital signal for subsequent calculation of processing,signal emission module parameter adjustment according to the feedback signal amplitude of the deposited the realization of the launch of the echo,module division of labor clear,stable and reliable.The software part is completed by PL and PS in the FZ3 A development board.The data acquisition module and data transmitting module are encapsulated into IP core at PL end,and the PS and the custom module are interconnected through AXI bus.Data collection and transmission are completed through the logic programming,timing analysis and constraints of I/O pins of each functional module.At the PS end,it is responsible for the storage of the original data,the control of the working state,the instruction interaction of the device and the network communication of the data,etc.Finally,it is implanted into the Linux operating system to complete the start of the program.After the completion of the design,laboratory debugging was carried out to verify that the functions of data collection,transmission,storage and transmission all reached the design targets,and the design needs of the system were met by comparing with the original data.Finally,the overall feasibility,real-time performance and stability of the system platform were verified by laboratory,pool test and lake test.The hardware platform of underwater target echo simulation designed in this paper meets the requirements of technical parameters,functions are stable and reliable,and it is easy for users to use and maintain.