水声信号采集系统设计与实现
文献类型：学位论文
| 作者 | 唐骁骧 |
| 学位类别 | 博士 |
| 答辩日期 | 2007-06-04 |
| 授予单位 | 中国科学院声学研究所 |
| 授予地点 | 声学研究所 |
| 关键词 | 数据采集 信号处理 声纳 FPGA LINK 多通道 |
| 其他题名 | Design and Implementation of Data Acquisition System in Underwater Acoustics |
| 学位专业 | 信号与信息处理 |
| 中文摘要 | 数据采集系统是声纳的一个重要组成部分。现代声纳尤其是军用声纳的发展使得基阵规模庞大，阵元数目众多；同时，声纳装备趋向于模块化，标准化和系列化。本文围绕研制符合现代声纳发展需求的水声采集系统这个课题而展开。 由于声纳具备多通道和高实时性的特性，采集系统必须和处理系统密切配合，形成一个高性能的并行结构。在第二章中，本文深入研究了多种并行处理的技术和架构，提出了一种符合声纳发展需求的数据采集系统总体结构。该系统采用模块化设计方法：采集系统，处理系统和其它各分系统都由标准CPCI模块构成；采集系统以FPGA为处理节点，处理系统以DSP为节点，标准LINK协议作为各模块间的高速互联通路，这些都使系统具备了良好的多通道扩展能力。 在第三章中，本文阐述了该采集系统的具体实现方法，其中包括模数转换电路，FPGA逻辑设计，PCI接口设计和多板同步机制等。该设计的一个创新之处是利用FPGA实现了LINK口，将采集系统与处理系统无缝连接。LINK口的互联机制使得节点间拓扑结构非常灵活，系统表现出良好的通用性。在多板同步机制方面，本文采用了LVDS标准来形成高精度同步网络，保证了多通道采集的相位一致性。 第四章介绍了利用该采集系统构建的声纳样机，并对采集系统的性能进行了详细的测试与评估。测试结果表明了该采集系统在采集精度，相位一致等性能方面达到了阵列水声信号采集的要求。最后一章是全文的总结。 |
| 英文摘要 | Data acquisition system is an important component of sonar. The development of modern sonar especially those for military use requires a large acoustic array with hundreds of sensors. Meanwhile, the sonar develops with a trend of modularization, standardization and serialization. The thesis focuses on the design of acoustic data acquisition system which will satisfy modern sonar techniques. Because sonar is multi-channel and real-time, the acquisition system should matches well with the processing system, working with high performance in a parallel architecture. Chapter Two put forward a system architecture which suits for modern sonar data acquisition. The very design emphasis the modularization method: the acquisition system, processing system and other systems are all based on standard CPCI modules. The acquisition system set FPGAs as the central node, while the processing system set the DSP as the central node. The modules use the standard LINK protocol for high speed interconnection in each other. Those characteristices above make the system good expansion ability for multi-channels. Chapter Three discusses the implementation of the system in several aspects, including AD conversion circuits, FPGA logic design, PCI interface design and multi-card synchronization. An innovation point is to construct LINK port using FPGAs, which connects the acquisition system and processing system seamlessly. The design provides considerable flexibility for the topology of the processing nodes. Moreover, LVDS standard is used to construct high precision synchronization network which guarantees minimal phase errors between different channels. Chapter Four constructs a sonar prototype with the acquisition system. On which the performance of the system is carefully evaluated. These tests proved that all the aspects of the performance such as acquisition precision, channel synchronization ability have met the requirements of acoustic signal processing. The system is very suitable for sonar equipment. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 50 |
| 源URL | [http://159.226.59.140/handle/311008/254]  |
| 专题 | 声学研究所_声学所博硕士学位论文_1981-2009博硕士学位论文 |
| 推荐引用方式 GB/T 7714 | 唐骁骧. 水声信号采集系统设计与实现[D]. 声学研究所. 中国科学院声学研究所. 2007. |
入库方式： OAI收割
来源：声学研究所
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