具有分布处理能力的细长阵数据传输系统研究
文献类型：学位论文
| 作者 | 闫景富 |
| 学位类别 | 博士 |
| 答辩日期 | 2007-05-31 |
| 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 | 细长阵 数据传输 模块化设计 分布式处理 嵌入式以太网 |
| 其他题名 | Research on Long Thin-line Array Data Transmission System with Distributed Processing Ability |
| 学位专业 | 信号与信息处理 |
| 中文摘要 | 对硬件结构有着严格体积限制的高速、远距离、分布式数据传输技术是细长阵声纳系统的关键技术之一。本文以拖曳线列阵声纳为实际应用背景，围绕细长阵声纳中的关键部件——自定义网络协议的数据传输节点的设计，以及小型化技术、数据同步传输技术、信道均衡技术等方面展开了深入研究，研制了一套包括湿端自定义网络协议数据传输节点、光/电转换模块和干端数据接收模块在内的开放式细长阵数据传输系统。文中分别对各模块的设计进行了详细阐述，其中由多个数据传输节点组成的水下数据传输系统是本文的主要研究内容。在整个数据传输系统设计中解决了如下问题： (1) 对于数据传输节点设计： 提出了一种基于时序复接的串行数据传输技术，实现了对分布式传感器数据包与命令包在单闭环拓扑网络结构中的有效传输； 设计了一种使传输模块具有自组网、自定位能力的新方法，并在此基础上，实现了声阵段结构的分段模块化及其可互换性。从而大大提高了系统的可扩展性、可维护性以及系统的错误定位能力。 设计了一种有效的命令包及其解析方法，使干端系统可以对水下任意节点进行控制，进而可实现对与之相关模块的控制（如A/D模块），实现了双工系统。 采用中断判断、延时等待机制，避免了环型网络中由于链路意外断开造成的网络整体瘫痪，提高了系统的容错能力和可靠性。 详细分析了“长线效应”在设计中对数据传输性能的影响，并给出了相应解决措施。实验表明信道均衡技术、隔离技术的使用，对信号传输质量有极其明显的改善。 利用节点DSP的余力，实现了对数据的分布式滤波处理。 (2) 对于干端数据接收模块： 设计和实现了自定义协议网络节点与干端数据转换系统的接口 在此基础上，通过与干端数据转换和监控系统的结合（参见Ref[104]），实现了一种将自定义网络节点与标准开放的以太网相结合的数据传输方案，使整套数据传输系统实现了通用性和开放性。 通过对整套数据传输系统进行实验室测试发现，该系统可以满足常规拖曳线列阵声纳数据传输的要求，也可应用于最大串行传输速率不超过150Mbit/s的其它分布式的多传感器系统。该系统是完全自主设计和研发的系统，为实现我国细长阵数字缆的国产化，取代国外关键部件——数据传输节点打下基础。 |
| 英文摘要 | The high-speed, long-range and distributed data transmission technique, which has strict requirement on the dimension of devices, is one of the key techniques for the long thin-line array sonar system. Based on the background of towed line array sonar, the design of the data transmission node with self-defined network protocol, known as a key element of thin-line array sonar, is discussed in this dissertation. Moreover, miniaturization technique, synchronous data transmission technique and circuit equalizing technique are also deeply studied, and then an open thin-line array data transmission system is developed which includes the wet-end data transmission node, the O/E transformation module and the dry-end data reception module. The design of all these modules is described in detail, and the underwater data transmission system composed by multi-node is the main content. The following problems are solved in the design: (1) By designing the data transmission node A serial data transmission technology based on timing multiplexing is proposed, which can ensure the distributed sensors data package and the command package are effectively transmitted in the ring topology network. A new method is proposed to make modules have self-organizing and self-localization abilities, and on this basis, the modularization structure of hydrophone array and its permutation are realized, which improves the expansibility, maintainability and error localization ability of the system. An effective command package and its resolution method are designed, which make sure the dry-end system can control any underwater node and the relative modules such as A/D module, then the duplex system can be realized. Interruption determination and delay-and-wait mechanism are adopted, so that the whole ring network paralysis attributing to unexpected link disconnection can be avoided, and the tolerance to errors and reliability of the whole system can be enhanced. “Long transmission line effect” on the data transmission is analyzed, and the corresponding solution is also presented. The experimental results indicate that the circuit equalizing and isolation techniques can obviously improve the signal transmission quality. Distributed data filtering processing is implemented by making use of the DSP in the nodes. (2) By designing the dry-end data reception module The interface between data transmission nodes and the dry-end data transformation system is designed and realized. In addition, through the cooperation of dry-end data transformation and monitor system, a kind of data transmission scheme is realized, which combines the self-designed network with the standard open Ethernet. This scheme ensures the currency and opening of the whole data transmission system. From the results of laboratory experiments, it can be concluded that the design not only satisfies the data transmission requirement of general towed line array sonar system, but also can be applied to all the other distributed multi-sensor systems in which the serial transmission speed is less than 150Mbit/s. This system is completely designed independently and makes it possible to realize the indigenization of the digital long thin-line array. |
| 语种 | 中文 |
| 公开日期 | 2011-05-07 |
| 页码 | 119 |
| 源URL | [http://159.226.59.140/handle/311008/180]  |
| 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 | 闫景富. 具有分布处理能力的细长阵数据传输系统研究[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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