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基于Labview的温度分析系统设计_通信工程专业论文范文

发布时间:2015-01-24 来源:人大经济论坛
通信工程专业论文 目 录 1 系统设计背景1 1.1 虚拟仪器的定义1 1.2虚拟仪器概况1 1.3 目前温度分析系统的现状2 1.4 开发基于LABVIEW温度分析系统的现实意义3 1.5 本课题的目标和主要研究内容3 2系统总体方案设计5 2.1 课题要求5 2.2 方案分析与论证5 2.2.1 测温模块方案5 2.2.2 数据采集和传输方案5 2.2.3 LABVIEW读取串口方案5 3 数据采集系统硬件设计7 3.1 温度采集模块7 3.2 单片机模块8 3.2.1 主要性能参数9 3.2.2 功能特性9 3.2.3 单片机最小系统10 3.2.4引脚功能说明10 3.3 串口通讯电路14 3.3.1 串口通讯介绍14 3.3.2 单片机如何与电脑连接15 3.3.3 电路原理图16 4 温度采集系统软件设计17 4.1 软件实现方案17 4.2 软件流程图17 4.2.1主程序流程图:18 4.2.2采集程序流程图:18 5 LABVIEW分析系统设计20 5.1 LABVIEW界面介绍20 5.2 LABVIEW采集程序设计20 5.2.1 VISA介绍20 5.2.2 VISA配置程序设计21 5.2.3 数据处理实现22 5.2.4 数据处理程序设计22 5.3 LABVIEW子VI的设计23 5.3.1 VI的定义23 5.3.2 如何制作和调用子VI23 5.4 系统面板设计26 5.5 子面板的调用27 5.5.1 串口温度采集系统界面27 5.5.2 关于本软件界面28 5.6 安全管理28 5.7 程序的打包与发布30 6 总 结33 6.1全文工作总结33 6.2 存在的问题及工作展望33 致 谢34 参 考 文 献35 摘 要 目前的测温控制和分析系统大都使用传统温度测量仪器.其功能大多都是由硬件或固化的软件来实现,而且只能通过厂家定义、设置,其功能和规格一般都是固定的,用户无法随意改变其结构和功能,因此已不能适应现代化监测系统的要求。随着计算机技术的飞速发展,美国国家仪器公司率先提出了虚拟仪器的概念,彻底打破了传统仪器由厂家定义、用户无法改变的模式,使测控仪器发生了巨大变革。虚拟仪器技术充分利用计算机的强大运算处理功能,突破传统仪器在数据处理、显示、传输、存储等方面的限制,通过交互式图形界面实现系统控制和显示测量数据,并使用框图模块指定各种功能。采用集成电路温度传感器和虚拟仪器方便地构建一个测温系统,且外围电路简单,易于实现,便于系统硬件维护、功能扩展和软件升级。虚拟仪器具有强大的数据处理能力,并且具备多种仪器设备功能于一体,能够从分享用计算机所有资源,实现普通仪器所不能实现的功能。而且拥有良好的人机设计界面,简单易学,设备集成度高,灵活多变。 单片机温度采集和分析系统成本低廉,结构简单,易用性高,通过与LABVIEW软件结合,变成了一套完善的具备数据采集,数据处理和数据分析,数据存储电子仪器。具备多功能于一体,小型化,功耗低的特点。这里利用LABVIEW8.6简体中文版作为语言开发平台,设计系统软件,并利用计算机串口与下位机串行通讯,实现温度的实时测量与控制。 关键词: 虚拟仪器;数据采集;数据分析;LABVIEW;单片机;串口 ABSTRACT Temperature control and analysis of current systems mostly use the traditional temperature measuring instruments. Most of its functions are cured by the hardware or software to implement, and can only be defined through the factory, set up, its features and specifications are generally fixed, users can not arbitrarily change its structure and function, so can not meet the modern monitoring system requirements. With the rapid development of computer technology, National Instruments pioneered the concept of virtual instrument, completely breaking the traditional instruments defined by the manufacturer, the user can not change the model so that measurement and control equipment has undergone tremendous changes. Full use of the virtual instrument technology computing processing power of computers to break through the traditional instruments in the data processing, display, transmission, storage and other aspects, through an interactive graphical interface to achieve system control and display measurement data, and use a variety of functions specified module block diagram . Using integrated circuit temperature sensor and instrument to easily build a temperature measurement system, and the external circuit is simple and easy to implement, easy system hardware maintenance, extensions, and software upgrades. Virtual instruments are powerful data processing capability, and has a variety of instruments and equipment functions into one, to all the resources from a shared computer, to achieve functionality not possible with ordinary instruments. And with good man-machine interface design, easy to learn, high integration and flexibility. MCU temperature acquisition and analysis system cost, simple structure, ease of use high, combined with LABVIEW software into a complete set of available data acquisition, data processing and data analysis, data storage, electronic equipment. With in-one, small, low power consumption. Here the use LABVIEW8.6 Simplified Chinese as the language development platform, system software design and computer serial port and of Serial communication, to achieve real-time temperature measurement and control Key words : virtual instrument; data acquisition; data analysis; LABVIEW; serial port; single chip
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