基于Wi-Fi的气缸无线传输网络系统的设计

发布时间：2018-06-04 15:04

本文选题：气缸 + Wi-Fi技术　；参考：《电子科技大学》2017年硕士论文

【摘要】：二十一世纪以来,无线技术的迅猛发展不仅改变了人们的生活,也推动了工业自动化技术发生革命性的变化。随着智能制造在气动领域的应用,气动系统对高速无线化的需求与日俱增。Wi-Fi作为目前最广泛使用的短距离高速无线传输解决方案,开始逐步进入工业气动领域。气动现场对数据传输实时性有严格的技术指标,包括实时性要求方面的高通信速率和低通信时延,因此针对气动控制需求研究并设计一套基于高速无线通信技术的气动传输网络系统是极为必要的。本文分析了气动系统工作原理以及气动执行元件气缸的特点,明确了课题的设计需求。通过无线通信技术现状的文献调研,对比分析技术特性,最终确定了以Wi-Fi作为气缸无线传输网络系统的技术路径。在此基础上进行了深入的研究,主要研究内容如下:(1)通过网络拓扑结构对比和Wi-Fi协议栈特性分析构建了系统框架,确定了系统总体设计方案。并根据状态转移概率针对系统通信过程建立了Markov数学仿真参考模型,通过MATLAB软件对其进行仿真分析,进一步计算得到通信时延期望。为本课题实验以及相关领域研究提供参考依据。(2)确定了“双核心”硬件架构,采用PCB设计软件Altium Designer对系统硬件电路进行设计,完成了实验平台的搭建,包括:双主控芯片选型,节点单元电路设计,分离式Wi-Fi模组设计,下载模块设计以及转接板设计。(3)采用集成Wi-Fi内核SDK的Eclipse软件和面向嵌入式程序设计的Keil软件分别实现了对Wi-Fi传输控制程序设计和节点单元处理程序设计,并完成了通信协议的制定。为保障高通信速率、低通信时延和高可靠性,针对不同的传输模式,采用了不同的控制策略,重点研究并设计了相应的控制算法,优化了传输方案,取得了良好的效果。(4)基于硬件实验平台,对不同实验环境,配置条件,传输模式以及控制方案下的Wi-Fi通信进行测试,通过改变实验参数,得到通信时延关于各个影响因素的变化曲线。大量实验为应用程序的设计提供反馈,促进软件迭代优化,实验结果也验证了气缸Wi-Fi无线传输网络系统的可行性和较高的参考应用价值。
[Abstract]:Since 21 century, the rapid development of wireless technology has not only changed people's lives, but also promoted the revolutionary change of industrial automation technology. With the application of intelligent manufacturing in pneumatic field, the demand for high-speed wireless in pneumatic system is increasing. Wi-Fi, as the most widely used short-range high-speed wireless transmission solution at present, has gradually entered the industrial pneumatic field. Pneumatic field has strict technical specifications for real-time data transmission, including high communication rate and low communication delay. Therefore, it is necessary to research and design a pneumatic transmission network system based on high speed wireless communication technology. The working principle of pneumatic system and the characteristics of pneumatic actuator cylinder are analyzed in this paper. Through the literature investigation of the current situation of wireless communication technology and the comparative analysis of the technical characteristics, the technical path of the cylinder wireless transmission network system based on Wi-Fi is finally determined. The main contents are as follows: 1) based on the comparison of network topology and the characteristic analysis of Wi-Fi protocol stack, the system framework is constructed, and the overall design scheme of the system is determined. According to the state transition probability, the Markov mathematical simulation reference model is established for the communication process of the system. The simulation analysis is carried out through the MATLAB software, and the expectation of the communication delay is further calculated. The hardware structure of "double core" is determined. The hardware circuit of the system is designed by PCB software Altium Designer, and the experimental platform is built, including the selection of dual master control chip. Node unit circuit design, split Wi-Fi module design, Download module design and switch board design. 3) using Eclipse software integrated with Wi-Fi kernel SDK and Keil software oriented to embedded program design, the design of Wi-Fi transmission control program and node unit processing program are implemented, respectively. And has completed the communication protocol formulation. In order to guarantee high communication rate, low communication delay and high reliability, different control strategies are adopted for different transmission modes. The corresponding control algorithms are studied and designed, and the transmission scheme is optimized. Good results are obtained. Based on the hardware experimental platform, the Wi-Fi communication under different experimental environment, configuration conditions, transmission mode and control scheme is tested, and the experimental parameters are changed. The variation curve of communication delay about each factor is obtained. A large number of experiments provide feedback for application program design and promote software iterative optimization. The experimental results also verify the feasibility and high reference value of cylinder Wi-Fi wireless transmission network system.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TH138.51;TN92

【参考文献】