基于OMAP-L138的应答器设计与实现

发布时间：2018-05-21 13:56

本文选题：水声定位系统 + 声学应答器　；参考：《哈尔滨工程大学》2014年硕士论文

【摘要】：应答器在水声定位系统中具有至关重要的作用,本文研究设计了一款具有应答、释放功能的水声应答器,主要进行数字硬件电路的设计和软件程序的开发,为今后应答器功能扩展奠定了基础。论文着重讨论了应答器定位信号检测、释放指令检测、唤醒信号检测的实现方法。采用相关检测算法实现对定位信号的检测、估计信号到达时刻、转发时延的同时通过时延编码的方式上传应答器当前深度信息;分析了兼容Benthos公司的释放命令码实现释放功能的解码方案;研究了以自适应Notch滤波器实现对唤醒信号的检测方法;并通过Matlab仿真讨论了相关检测算法、自适应Notch滤波器算法的可行性。论文设计的应答器数字硬件电路平台以OMAP-L138为核心,阐述了 OMAP-L138最小硬件系统、A/D采集电路、值班电路、电源电路、通信电路等的设计方案。系统软件开发主要完成了系统驱动模块,以及定位信号检测算法、释放指令检测算法在OMAP-L138上的实现,完成了唤醒信号检测算法在MSP430F6638上的实现,并实现了通过上位机配置应答器的工作状态。论文对设计的应答器进行了综合测试。利用信号源模拟了定位信号、释放指令信号、唤醒信号,检测应答器的应答、释放、值班功能,对应答器的接收灵敏度和数据存储等功能进行了测试,结果表明所设计的应答器能够实时检测任务信号,符合设计要求。
[Abstract]:Transponder plays an important role in underwater acoustic positioning system. In this paper, a kind of underwater acoustic transponder with the function of response and release is designed, which is mainly used in the design of digital hardware circuit and the development of software program. It lays a foundation for the expansion of transponder function in the future. This paper focuses on the realization of transponder location signal detection, release instruction detection and wake-up signal detection. The correlation detection algorithm is used to detect the location signal, to estimate the arrival time of the signal, and to upload the current depth information of the transponder by the way of delay coding while forwarding the delay. The decoding scheme of releasing command code compatible with Benthos is analyzed, and the detection method of wake-up signal with adaptive Notch filter is studied, and the correlation detection algorithm is discussed by Matlab simulation. The feasibility of adaptive Notch filter algorithm. The digital hardware platform of transponder designed in this paper is based on OMAP-L138. The design scheme of OMAP-L138 minimum hardware system such as A / D acquisition circuit, duty circuit, power supply circuit, communication circuit and so on is expounded. The system software development mainly completes the system driving module, as well as the localization signal detection algorithm, the release instruction detection algorithm on the OMAP-L138, and the realization of the wake-up signal detection algorithm on the MSP430F6638. The working state of transponder is realized by the upper computer. A comprehensive test of the designed transponder is carried out in this paper. The signal source is used to simulate the location signal, release the instruction signal, wake up the signal, detect the transponder's response, release, watch function, test the receiving sensitivity and the data storage function of the transponder, etc. The results show that the designed transponder can detect the task signals in real time and meet the design requirements.
【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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