激光偏振水下目标探测信息处理系统设计

发布时间：2018-01-16 19:07

本文关键词：激光偏振水下目标探测信息处理系统设计　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：本文设计了激光偏振水下目标探测信息处理系统,利用532nm激光器为发射源,通过控制以Cyclone V芯片为主处理器的电路系统来实时接收水下目标反射的激光回波信号并提取出偏振信息,同时用GPS实时获取该探测点的定位信息,实现对激光偏振数据和GPS定位数据的同步采集、处理和保存,之后对采集到的数据进行整理与分析,为水下目标探测提供一种新型且可靠的手段。本文内容主要分为四个部分:第一部分介绍了激光偏振水下目标探测的研究背景及意义,以及激光偏振水下目标探测的国内外研究现状;第二部分首先介绍了激光水下目标探测和偏振目标探测的原理,然后设计了系统的总体方案,将系统分为五个模块:激光产生模块、激光偏振信息采集模块、步进电机模块、GPS信号采集模块和信息处理模块;第三部分介绍了信息处理模块的硬件电路设计,是系统设计的核心,用于实现数据的采集、处理和保存。信息处理模块由FPGA核心板和FPGA底板通过接插件相连构成,具有灵活性好、结构紧凑、成本低等优点。而且搭载了性能优越的Cyclone V处理器使得系统控制简单、可靠性高、通用性强,大大缩短了开发周期。第四部分介绍了系统的软件设计与试验,首先,采用模块化设计思想将系统软件分为AD采集软件设计、GPS信号采集软件设计、步进电机软件设计和SD卡信息存储软件设计四个模块,然后将各模块进行集成并整体调试,模块化设计不仅缩短了设计周期,而且提高了软件的可靠性和可维护性。最后,用本系统开展了多组试验,并分析了目标偏振特性与激光入射角、探测角、水体温度、目标表面粗糙度、目标材质等条件的关系。实验表明,本系统可以实现对水下目标激光偏振数据和GPS定位数据的同步采集、处理和保存,满足激光偏振水下目标探测信息处理系统的设计要求。
[Abstract]:In this paper, a laser polarization underwater target detection information processing system is designed, using 532nm laser as the emitter. By controlling the circuit system with Cyclone V chip as the main processor, the laser echo signal reflected from underwater target can be received in real time and polarization information can be extracted. At the same time, we use GPS to acquire the location information of the detection point in real time, realize the synchronous acquisition, processing and saving of laser polarization data and GPS positioning data, and then collate and analyze the collected data. This paper is divided into four parts: the first part introduces the research background and significance of laser polarization underwater target detection. And the research status of laser polarization underwater target detection at home and abroad; In the second part, the principles of laser underwater target detection and polarization target detection are introduced, and then the overall scheme of the system is designed. The system is divided into five modules: laser generation module, laser polarization information acquisition module. Step motor module includes GPS signal acquisition module and information processing module; The third part introduces the hardware circuit design of the information processing module, which is the core of the system design, which is used to realize the data acquisition. Processing and saving. The information processing module is composed of FPGA core board and FPGA bottom board through the connector, with good flexibility and compact structure. With the advantages of low cost and excellent performance, the Cyclone V processor makes the system control simple, reliable and versatile. The software design and test of the system are introduced in 4th part. Firstly, the system software is divided into AD acquisition software design and GPS signal acquisition software design by modular design idea. Step motor software design and SD card information storage software design four modules, and then the integration of each module and the overall debugging, modular design not only shortened the design cycle. And improve the reliability and maintainability of the software. Finally, the system carried out a number of experiments, and analyzed the polarization characteristics of the target and laser incidence angle, detection angle, water temperature, target surface roughness. Experimental results show that the system can realize synchronous acquisition, processing and storage of laser polarization data and GPS positioning data of underwater targets. It meets the design requirements of laser polarization underwater target detection information processing system.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN24

【参考文献】