基于LabVIEW虚拟电子秤的设计

基于LabVIEW虚拟电子秤的设计(论文17000字)   
摘  要
    虚拟仪器是指在通用计算机上添加一层软件和一些硬件模块，使用户操作这台通用计算机就像操作一天自己专门设计的仪器一样，虚拟仪器系统与传统仪器相比，具有性价比高，开放性，智能化程度高，界面友好等特点。LabVIEW是目前应用最广泛的虚拟仪器开发平台软件之一，也是一种用图标代替文本创建应用程序的图形化编辑语言，集成了与满足GPIB、VXI、RS-232和RS-485协议的硬件及数据采集卡通讯的全部功能，而且内置了ICP/IP、Active等软件标准的库函数，可以方便地建立自己的虚拟仪器，已经广泛的被工业界、学术界和研究实验室所接受，视为标准的数据采集和仪器控制软件。   
   这个设计是介绍虚拟电子称的概念,是传感器技术的结合,数据采集技术和虚拟仪器技术开发一个基于虚拟仪器的电子秤设计,使用图形可视化虚拟仪器软件开发平台,测试软件转换测量重量处理数据收集、处理、实时显示。
关键词：虚拟仪器；电子称；LabVIEW

Abstract
With the development of science and technology,the requirement on measurement technology is getting more and more important.The application of electronic measurement technology has extended to more fields than before.Due to limited functions and big size,traditional electronic measuring equipments are no longer suitable to common purposes.The rapid development of integrated circuit and computer technology gives birth to a new kind of instrument,Virtual Instrument(VI).As a result,the testing cost increases by a wide margin.In recently years,a new measure technology that combines the technology of electron,technology of computer,technology of network,is developed and this new technology is named VI.Especially various measuring instruments based on computer,they are more widely used because of their excellence such as:lower cost,easily used,etc.
The design of sensor technology, data acquisition technology and instrument technology development and design a LabVIEW-based electronic steelyard, the system used for ordinary PC-host, the use of graphic visual test software for LabVIEW software development platform, the weight will be tested Conversion processing of data acquisition, real-time processing that.

Keyword: Electronics steelyard;Virtual instrument;LabVIEW

目录
1 绪论    1
      1.1 虚拟仪器和LabVIEW简介    1
      1.1.1虚拟仪器    1
1.1.2虚拟仪器的主要特点    3
1.1.3虚拟仪器的发展方向    5
1.2.2电子秤的发展状况    9
1.3电子秤的系统构成及其使用功能    10
    1.3.1电子秤的分类    11
    1.3.2电子秤的现状    12
2 系统方案设计    15
2.2传感器    16
2.3数据采集    19
3  LabVIEW    24
3.1.2 LabVIEW的图形化程序设计    26
3.1.3图形化的程序设计的步骤    27
3.2 LabVIEW使用的优势    28
4  LabVIEW的电子秤设计    29
4.2前面板界面设计    34
4.2.1 程序框图设计    34
4.2.2波形和数据显示    39
4.5本章小结    40
参考文献    41