基于SimpliciTI的大田图像采集与无线传输系统的研究与实现

发布时间：2018-04-30 15:30

本文选题：大田图像 + SimpliciTI网络协议　；参考：《南京农业大学》2015年硕士论文

【摘要】：随着现代控制技术、微电子技术在农业中的不断渗透和应用,农艺水平的不断提高,农业的发展已从传统农业逐渐转变为现代农业,并且发展规模逐渐扩大。为生长作物提供最适应的环境,进而有效增加作物产量和品质,提高地区经济效益是现代化农业发展的趋势,获取农田所包含的信息是现代化农业研究的基础。其中农田图像信息是反应农田情况的重要信息之一。针对现场安装困难、布线复杂、线路老化和监测死角等问题,有效解决农田图像信息采集系统传输方式的不足。本课题研究并设计一套基于SimpliciTI网络协议的大田图像采集与无线传输系统,系统由以下三部分组成。农田图像定点采集网络:系统采用MCU与RF分开设计的硬件匹配结构。将SimpliciTI网络协议移植到STM32硬件平台。图像采集模块采用锂电池供电,并引入sleep-wake up机制大幅降低图像节点能耗。将采集到的图像存储到节点外扩的SD卡中,并分包经中继节点,路由转发传输至网关节点.农田图像网关设备:网关节点和图像节点采用相互兼容控制器,移植uIP协议栈,使用SPI接口与Ethernet模块通信,实现无线传感器网络与外部网络协议的转换和物理连接。网关数据和外部无线网桥通过网口相连,将图像数据传输至监控室内服务器进行存储管理。远程Web服务器·.Web服务器主要是远程获取图像信息以及图像查询工作,分别由大田图像数据库、服务器应用软件和Web系统构成。本地服务器通过定向Wi-Fi设备实现和网关服务通信。其中农田图像数据库是基于OraclelOg数据库版本开发,Web系统基于Hibernate框架设计,使用JSP开发,通过Tomcat完成远程Web服务器发布。系统整体测试运行稳定、可靠,能够顺利采集图像,无线传感器网络通过加入中继节点组成网状拓扑网络,满足无线组网获取大田图像信息的需求,课题使用定向Wi-Fi设备最远可达500m,满足大田距离要求,设计合理。并且实验测试了图像节点的通信参数,包括误码率和包错误率,图像数据共153600B,对原始图像数据进行了增加BMP文件头的恢复设计,对图像采集节点进行点对点图像无线传输单跳和多跳实验测试,结果表明图像无线传输系统的能力由传输速率、节点能耗、传输宽带、节点路由功能等共同决定,系统整体设计为大田图像采集无线化和组网简单化提供了一种新的解决方案。
[Abstract]:With the continuous penetration and application of modern control technology, microelectronics technology in agriculture and the continuous improvement of agronomic level, the development of agriculture has gradually changed from traditional agriculture to modern agriculture, and the scale of development has gradually expanded. It is the trend of modern agriculture development to provide the most suitable environment for growing crops, and to increase crop yield and quality effectively. Obtaining the information contained in farmland is the basis of modern agricultural research. Among them, the field image information is one of the important information to reflect the farmland situation. In order to solve the problems such as difficult installation, complex wiring, aging of lines and monitoring dead angle, the shortage of transmission mode of field image information collection system is effectively solved. This paper studies and designs a field image acquisition and wireless transmission system based on SimpliciTI protocol. The system consists of the following three parts. Fixed-point acquisition network of farmland image: the system adopts hardware matching structure which is designed separately by MCU and RF. The SimpliciTI network protocol is transplanted to the STM32 hardware platform. The image acquisition module is powered by lithium battery, and the sleep-wake up mechanism is introduced to greatly reduce the energy consumption of image nodes. The collected images are stored in the SD card which is spread out of the node and subcontracted through the relay node and transmitted to the gateway node. Field image gateway equipment: the gateway node and image node adopt mutually compatible controller, transplant uIP protocol stack, use SPI interface to communicate with Ethernet module, realize the conversion and physical connection between wireless sensor network and external network protocol. The gateway data and the external wireless bridge are connected through the network port, and the image data is transmitted to the monitoring room server for storage and management. The remote Web server. The web server is mainly composed of field image database, server application software and Web system. The local server communicates with the gateway service through the directed Wi-Fi device. The farmland image database is developed based on the version of OraclelOg database. The web system is designed on the basis of Hibernate framework and developed with JSP. The remote Web server is published through Tomcat. The system runs stably and reliably, and can collect images smoothly. The wireless sensor network forms a network topology network by adding relay nodes to meet the needs of wireless network to obtain field image information. The application of directional Wi-Fi equipment can reach 500m, which meets the requirements of field distance and is reasonably designed. The communication parameters of the image node, including bit error rate and packet error rate, are tested experimentally. The image data is 153600B. the original image data is added to the BMP file header recovery design. The single-hop and multi-hop experiments of point-to-point image wireless transmission are carried out on the image acquisition nodes. The results show that the capability of the image wireless transmission system is determined by the transmission rate, node energy consumption, transmission broadband, node routing function and so on. The overall design of the system provides a new solution for field image collection wireless and network simplification.
【学位授予单位】：南京农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S126;TP274.2;TN92

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