基于LabVIEW的温度监测仪的设计

摘 要

近年来，美国NI公司的LabVIEW已经面向成熟和商业化，使用者在配有专用或通用插卡式硬件和软件开发平台的个人计算机上，可按自己的需求，设计和组建各种测试分析仪器和测控系统。由于LabVIEW提供的是一种适应工程技术人员思维习惯的图形化编程语言，图形界面丰富，内含大量分析处理子程序，使用十分方便，个人仪器发展到了使用者也能设计、开发的新阶段。

针对传统测温系统存在的若干问题，基于虚拟仪器技术，利用LabVIEW 软件设计开发了温度测量系统。将传感器测量到的数据通过数据采集卡采集到计算机，再利用虚拟仪器开发软件LabVIEW进行编程，向用户提供操作界面和显示界面，实现了温度的数据采集、传送、分析和显示，并向用户提供历史查询功能。结果表明，系统结构简单、界面良好、易于操作，测量准确、稳定可靠、温度控制精度优于±0.3℃，可以满足各个行业测试的需要。

关键词： LABVIEW，DAQ助手，温度监测，数据采集

Abstract

In recent years， NI LabVIEW companies have mature and commercially oriented， the user with a dedicated or general-purpose plug-in hardware and software development platform for personal computers， according to their needs， design and build of various test instrumentation and control system. LabVIEW provides the engineering and technical personnel is a habit of thinking to adapt the graphical programming language， a rich graphical interface， containing a large number of processing routines， easy to use， users of personal equipment can be developed to design a new stage of development.

In view of traditional temperature measurement existence certain questions， using of LabVIEW software，the temperature measuring system based on virtual instrument technique is designed. It can realize the data acquisition of temperature as well as data transmission，analysis and display，with the development software of virtual instruments LabVIEW，sensors，data acquisitions and so on，in addition to provide users with historic data inquire. Experimental results show that the system is simple，good interface，easy operation，measurement accuracy，stable，temperature control accuracy is better than ± 0.3 ℃ to meet the needs of various industries test.

Keywords: LABVIEW， DAQ Assistant， Temperature Monitoring， Data Acquisition

目 录

摘 要 .................................................................................................................................................. I ABSTRACT ................................................................................................................................................. II 第1章 绪 论 ...................................................................................................................................... 1 1.1引言 ..................................................................... 1 1.2 LABVIEW 8.5简介 .......................................................... 1 1.3虚拟仪器简介 ............................................................. 2 1.4 NI-USB-6008数据采集卡简介 ............................................... 3 第2章 温度监测的系统设计 .............................................................................................................. 5 2.1总体设计思路 ............................................................. 5 2.1.1 设计方案 .............................................................................................................................. 5 2.1.2温度监测仪总体设计结构 ................................................................................................... 5 2.1.3 虚拟数据采集系统的构成 .................................................................................................. 5 2.2 温度数据采集设备与指标 ................................................... 6 2.2.1数据采集设备 ....................................................................................................................... 6 2.2.1数据采集主要指标 ............................................................................................................... 6 第3章 系统的具体实现 .................................................................................................................... 8 3.1 创建新VI ................................................................ 8 3.2创建DAQ助手 ............................................................. 8 3.3 模拟通道程序框图 ........................................................ 12 3.4温度监测界面的前面板 .................................................... 14 第4章 测试运行 .............................................................................................................................. 16 4.1数据采集的运行 .......................................................... 16 4.1.1温度监测运行通道无报警 ................................................................................................. 16 4.1.2温度监测运行通道1报警 ................................................................................................. 16 4.1.3温度监测运行通道2报警 ................................................................................................. 17 结 论 .................................................................................................................................................. 19 附录A NI-USB-6008详细参数 ...................................................................................................... 21 附录B DAQ助手连线图报表 .......................................................................................................... 22

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