【作者】 莫世奇；

【导师】 杨德森；

【作者基本信息】 哈尔滨工程大学 ， 水声工程， 2003， 硕士

【摘要】 在水声信号处理中，对数据处理速度的要求越来越迫切，实时数字信号处理已经成为声呐系统中的重要组成部分。近年来，随着矢量水听器的制造技术的不断进步，使得水下声矢量信号的探测和测量技术日益受到人们的关注，应用领域也不断扩大。实现声矢量信号的实时处理是十分必要的。 利用矢量水听器进行方位估计的方法主要有声强检测、旋转波束和矢量方程组等。声强检测可以有效地进行目标方位估计，利用频带划分、旋转波束、矢量方程组可以在一定程度上有效地解决多目标干扰的问题。矢量方程组属于非线性方程组，可以采用遗传算法或同伦算法进行求解。 ADSP SHARC21060是一种基于超级哈佛结构的通用数字信号处理器，SHARC的结构被设计为流水线并行处理器。本论文的内容就是将声矢量信号的处理技术与并行处理器件SHRAC21060紧密联系起来，实现声矢量信号的实时处理。 本文在充分了解SHARC21060的基本结构、总线、接口和内存等基本特点、性能的基础上，根据矢量水听器进行方位估计的信号处理基本原理，进一步设计了基于SHARC板的信号处理流程。根据信号处理运算量的需求以及SHARC21060芯片的内存量，在实际处理中，共使用了6片SHARC芯片，各芯片承担不同的任务，基本实现了流水线式的并行处理。 本文介绍了整套系统经历的几次矢量水听器的湖试和海试。本文给出了吉林松花湖湖试和青岛海试的结果。数据分析结果与理论结果基本吻合。整套系统设计合理，安全可靠。 综上所述，本文通过理论分析、软件设计、试验研究，将声矢量信号处理和DSP技术结合到一起，实现了声矢量信号的实时处理，可有效的对水中目标进行检测与跟踪。更多还原

【Abstract】 It is more and more imminently pressive for the speed of data processing in underwater acoustic digital signal processing. Now Real-time digital signal processing has been an important part of sonar system. In the recent years, along with the development of the production technology of the vector hydrophone, more and more people notice the importance of the detect and measure technology of underwater acoustic vector signal, and it is applied in more and more fields. So it is necessary to realize real-time digital signal processing of underwater acoustic vector signal.There are several ways of estimating direction of arrival in use of the vector hydrophone: acoustic intensity detection, beam revolving and vector equations. Acoustic intensity detection can efficiently estimate objective direction, and frequence partition, beam revolving and vector equations can differentiate multi-object. Vector equations is one of non-linearity equations, and we can solve it by inherit arithmetic or homotopy arithmetic.ADSP SHARC21060 is one of current digital signal processing boards based on super harvard architecture, and it’ s architecture is designed to streamy parallel. The main content of this paper is to contact signal processing technology of the vector hydrophone with SHRAC21060, and to realize real-time digital signal processing of underwater acoustic vector signal.On the basis of comprehending basic architecture, bus, interface, memory of SHARC21060, and making reference to basic theory of estimating direction by the vector hydrophone, signal processing flow which uses SHARC is designed on this paper. According to signal processing capcity and the memory of SHARC21060 chip, six SHRAC chips are used in practically processing. Every chip takes on different task, and it basically realized streamy parallel processing.It introduces several laky experimentations and maritime experimentations of the vector hydrophone system on this paper. And it gives the results of Jilin Songhua laky experimentation and Qingdao maritime experimentation. The results of analysing data are consistent with theory. The whole system is designed rationally and runs safely and reliably.In a word, on this paper it contacts underwater acoustic vector signal processing with DSP technology ,through theory analyse software design experimentation research, and realizes real-time processing of vector signal. It can efficiently detect and track underwater object.更多还原