【作者】 朱涛；

【导师】 张冈； 陈幼平；

【作者基本信息】 华中科技大学 ， 机械电子工程， 2004， 硕士

【摘要】 随着计算机技术和通讯技术的飞速发展,传感器技术的发展也进入了新的阶段---智能化与网络化阶段。智能化技术使传感器拥有了自己的“大脑”,使传感器拥有了对数据的处理能力。然而,缺乏交流、通讯手段的信息系统,被称之为“信息孤岛”。因此,拥有了智能的传感器也开始了朝着网络化的方向发展。网络化技术对提高传感器的数据处理与传输能力十分重要的意义。本文研究传感器网络化中的关键技术,包括智能传感器网络接口的软硬件的设计与实现。 本文阐述了传感器网络化中的技术环节,并根据本课题的具体要求选取了合适的开发软硬件平台,设计并实现了一种智能传感器网络接口。深入研究了传感器网络化的技术难点,结合IEEE P1451标准,采用嵌入式实时多任务操作系统,提出了一种适应性强、可靠性高的智能传感器网络接口设计方案。首先对IEEE P1451标准进行了深入理解,尤其是IEEE P1451.1标准中定义的网络适配处理器(NCAP)和IEEE P1451.2标准中定义的智能传感器接口模型(STIM)以及传感器电子数据表格(TEDS)。在此基础上,选择了合适的嵌入式网络开发平台Netbox,并确定了智能传感器网络接口的硬件结构。其次,采用了嵌入式实时多任务操作系统作为软件开发平台,采用实时多任务的软件设计方法实现了传感器的数据采集、显示和网络传输的任务,并使本传感器节点成为一个Web服务器,可实时在网页上浏览传感信息,并能网上提交TEDS,实现多传感器自适应功能。在此基础上,实现了此智能传感器网络接口与Internet和CAN总线网络的连接,在这些网络中,智能传感器网络接口都是作为网络上的一个自由节点可收发数据,并通过实验得到了良好的通讯效果。最后,尝试了此智能传感器网络接口与无线网络的连接,并提出了解决方案。通过采用AT指令集,实现了智能传感器网络接口的无线短消息报警功能。通过用TCP+IP+PPP+无线链路代替TCP+IP+ETHERNET+以太链路,实现了此智能传感器网络接口对无线网络的访问。更多还原

【Abstract】 With the rapid development of computer and communication technologies, the sensor technology has developed into a new period, namely the smart and networked sensors. The intelligent technology provides a sensor a smart brain so that it has the ability of data processing. Because of the lack of communication ability, a system is called ‘isolated information island’. Therefore, smart sensors should make their progress in the direction of network. It is very important for the network technology to improve the abilities of data processing and transmission of smart sensors. In this paper, the key technologies of smart networked sensors are studied, especially the design and implementation of the software and hardware of their smart networked interfaces.After the analysis of different steps of the realization of networked sensors, and the choice of a suitable developing platform, including software and hardware, for the research project, in this paper, a kind of smart networked interface is developed for smart sensors. Based on IEEE P1451 protocol and an embedded real-time multi-task operation system, a design scheme is presented for the design of such an interface.First of all, the IEEE P1451 protocol is studied, especially the definition of the network capable application processor (NCAP) in IEEE P1451.1 and the definition of the smart transducer interface module and the transducer electronic data sheet in IEEE P1451.2. By the way, an embedded network developing system, named Netbox, is selected and a hardware structure of the smart network interface of sensors is determined.Secondly, in this paper, an embedded real-time multi-task operation system is selected for the software development. A method of designing real-time multi-task is used to develop the functions of data collection, displaying and transmission of sensors on the network. In addition, a node of the sensor can become a web server, so sensors data can be browsed on Internet. Also, the function of adaptive multi-sensor can be realized by the submission of the transducer electronic data sheet (TEDS).After finishing above researches, the smart networked interface of sensors can be connected to Internet and CANBUS as a free node to send or receive message. Furthermore, it is proved by some experiments that such a smart networked interface has a good result of <WP=5>communication.Finally, the connection of the smart networked interface to wireless network is attempted, and a related solution is put forward. With the AT commands, a function of warnning with wireless short message has been performed. The smart networked interface of sensors accesses to the wireless network by way of TCP+IP+PPP+wireless link instead of TCP+IP+ETHERNET+internet link.更多还原