多通道数据采集存储系统的设计与实现
发布时间：2018-11-19 12:05
【摘要】：随着水声事业的不断发展,阵列信号处理技术逐渐的引入到水声事业中,并作为水声事业的一个重点研究方向,协助着人们探索着海洋这片神秘的领域。声纳基阵系统作为新型声纳体系的典型代表,改善了单个换能器指向性、灵敏度、增益等多方面的性能,并为水声领域中阵列信号处理技术的研究提供了物质条件。论文基于声纳基阵拾取信号的记录需求,设计了多通道数据采集存储系统。系统将经过信号调理电路处理后的48元声纳基阵拾取信号进行同步采集,并借助于GPS获取数据采样点的时间信息。数据的开始采集时间与整点时刻高精度对齐,多套设备可同步工作以获取同一时刻空间内多个点的声场信息。采集的数据与数据对应时间信息打包并记录到存储介质中。论文主要包括系统方案的设计、硬件平台的搭建、配套软件的编写等内容。以EP2C8Q208型号的FPGA和外设丰富的双核处理器OMAPL138为主控芯片,在此基础上根据功能指标的需求进行了外围电路的拓展。系统以6片AD转换芯片完成48个通道模拟信号的模数转换工作,并借助于GPS和原子钟完成精准的时间管理,以容量为512GB的SATA硬盘作为存储介质记录采集数据。通过FPGA和OMAP的协调工作,将AD采集的信号完整的记录到SATA硬盘中,实现系统功能的需求。最后,在实验室环境下进行测试并进行了外场试验,对系统的功能指标及其性能进行了验证。结果表明,多通道数据采集存储系统满足了各项指标的要求,工作状态稳定可靠,达到了预期的目标。
[Abstract]:With the continuous development of underwater acoustic industry, array signal processing technology is gradually introduced into underwater acoustic cause, and as a key research direction of underwater acoustic cause, it helps people to explore the mysterious field of ocean. As a typical representative of a new type of sonar system, sonar array system improves the directivity, sensitivity and gain of single transducer, and provides material conditions for the research of array signal processing technology in underwater acoustic field. In this paper, a multi-channel data acquisition and storage system is designed based on the recording requirement of sonar array pickup signal. After the signal conditioning circuit is processed, the 48 element sonar array pick-up signal is collected synchronously, and the time information of the data sampling point is obtained by means of GPS. The starting time of data acquisition is highly accurate aligned with the whole point time, and multiple devices can work synchronously to obtain the sound field information of multiple points in the space at the same time. The collected data and the corresponding time information of the data are packed and recorded in the storage medium. The thesis mainly includes the design of system scheme, the construction of hardware platform and the compilation of supporting software. Based on the EP2C8Q208 FPGA and the peripheral dual-core processor OMAPL138 as the main control chip, the peripheral circuits are extended according to the functional requirements. The system uses 6 AD conversion chips to complete the analog-to-digital conversion of 48 channel analog signals. With the help of GPS and atomic clock, the system completes accurate time management, and uses the SATA hard disk with the capacity of 512GB as the storage medium to record and collect the data. Through the coordinated work of FPGA and OMAP, the signal collected by AD is recorded into the SATA hard disk, and the requirement of system function is realized. Finally, the system's function and performance are tested and tested in the laboratory environment. The results show that the multi-channel data acquisition and storage system meets the requirements of various indexes, and the working state is stable and reliable.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB565
本文编号：2342250
[Abstract]:With the continuous development of underwater acoustic industry, array signal processing technology is gradually introduced into underwater acoustic cause, and as a key research direction of underwater acoustic cause, it helps people to explore the mysterious field of ocean. As a typical representative of a new type of sonar system, sonar array system improves the directivity, sensitivity and gain of single transducer, and provides material conditions for the research of array signal processing technology in underwater acoustic field. In this paper, a multi-channel data acquisition and storage system is designed based on the recording requirement of sonar array pickup signal. After the signal conditioning circuit is processed, the 48 element sonar array pick-up signal is collected synchronously, and the time information of the data sampling point is obtained by means of GPS. The starting time of data acquisition is highly accurate aligned with the whole point time, and multiple devices can work synchronously to obtain the sound field information of multiple points in the space at the same time. The collected data and the corresponding time information of the data are packed and recorded in the storage medium. The thesis mainly includes the design of system scheme, the construction of hardware platform and the compilation of supporting software. Based on the EP2C8Q208 FPGA and the peripheral dual-core processor OMAPL138 as the main control chip, the peripheral circuits are extended according to the functional requirements. The system uses 6 AD conversion chips to complete the analog-to-digital conversion of 48 channel analog signals. With the help of GPS and atomic clock, the system completes accurate time management, and uses the SATA hard disk with the capacity of 512GB as the storage medium to record and collect the data. Through the coordinated work of FPGA and OMAP, the signal collected by AD is recorded into the SATA hard disk, and the requirement of system function is realized. Finally, the system's function and performance are tested and tested in the laboratory environment. The results show that the multi-channel data acquisition and storage system meets the requirements of various indexes, and the working state is stable and reliable.
【学位授予单位】：哈尔滨工程大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TB565
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