基于FPGA多波束成像的声纳系统设计

给出了一种基于FPGA的多波束成像声纳整机的硬件电路设计方案,介绍了该方案中各分系统的具体电路实现,以Xilinx公司的FPGA芯片作为核心器件,根据干端PC下发的控制指令实现对180个基元的发射接收电路的控制,完成数字波束形成,并将波束数据通过千兆网上传至干端PC进行显示。系统电路设计简洁,具有较强的灵活性和扩展性。文中介绍了系统的硬件架构,论证了多波束成像声纳系统接收前端和数字信号处理模块的硬件设计方案。实际测试结果表明,系统能够清晰地对水底地形特征进行实时成像,具有15帧/s的刷新率。

Multi-beam Imaging Sonar System Based on FPGA

This paper presents a hardware design of multi-beam imaging sonar system based on FPGA chips of the Xilinx Corporation and circuit design of each subsystem is introduced sequentially. The system uses FPGA core processors to implement the control of a 180 channel transceiver circuit according to the commands from PC, and then to realize the digital beam forming. The image data is transferred back to the PC using Gigabit Ethernet for real-time display. The circuit design of the system is concise, flexible and scalable. The paper introduces the overall hardware architecture of the system. The hardware plans of the front end of sonar receiver and digital signal processing module are also designed in detail. The final results of the experiments prove that the system can clearly and in real time image the underwater terrain features with a 15 frames/s fresh rate.