摘  要：随着测控技术的研究与发展，测控技术正在向着自动化，智能化，数字化和网络化的方向发展。美国NI公司打出了“软件就是仪器”的口号，LabVIEW应运而生。LabVIEW是一种业界标准图形化编程工具，主要用于开发测试，测量和控制系统。由于LabVIEW可以用来创建一个通用的应用程序，它被称为一种通用的编程语言。但是它在测试、测量和自动化等领域有更大的优势，因为LabVIEW提供了大量的工具和功能的数据采集、分析、显示和储存。

在日常生活中，检测温度在当今工业、农业等很多领域是不可或缺的。传统的温度计在温度测量和数据读取方面相对的比较繁琐，所以本文介绍了一种既方便测量读取数据的基于LabVIEW数字温度计的设计。本方案采用虚拟仪器的图形编程，数据采集功能，最终实现对温度的精确测量。实验结果表明，此方法对温都的测量简单、易操作和容易读数，有着巨大的应用前景。91067

毕业论文关键字：LabVIEW；虚拟仪器；数字温度计

ABSTRACT：With the development of measurement and control technology, control technology is toward automation, intelligent, digital and network direction。 The United States of America NI company has put forward the concept of "software is the instrument" emerge as the times require, so LabVIEW。 LabVIEW is a leading industry standard graphical programming tools, and is mainly used for system development and testing, measurement and control。 Because LabVIEW can be used to create universal applications, therefore is called a general purpose programming language。 But it has more advantage in test, measurement and automation fields, because LabVIEW provides a number of tools and functions for data acquisition, analysis, display and storage。

Measure temperature in the daily life of the common, is very necessary for real-time monitoring of temperature。 The traditional thermometer measurement of body temperature and reading are relatively trouble, and the traditional thermometer is composed by mercury, mercury on the body great harm。 Compared with the common thermometer, digital thermometer can be more convenient, fast, and not to the body as a risk measurement。 So this paper on the basis of this, presents a convenient measurement, read, and will not cause harm to the design of the thermometer body。 The program uses virtual instrument graphical programming, data acquisition function, finally realize the accurate measurement of body temperature, the experimental results show that, this method is simple, easy to measure the temperature of operation and easy reading, has great application prospects。

Key words：LabVIEW；virtual instrument; the digital thermometer 

 目    录

1 绪论 5

1。1  设计背景 6

1。2 选题的目的和意义 7

2系统工作流程 8

3 硬件电路设计 10

3。1 AT89C52的介绍 10

3。2温度采集模块 13

3。3单片机系统 17

4 虚拟仪器技术 17

4。1虚拟仪器的基本概念 19

4。2虚拟仪器的组成 19

4。3虚拟仪器的特点 19

5 软件设计 21

5。1软件Labview 21

    5。2串口通讯