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1、 I 基于 LabVIEW 的 PDA 软件设计 摘 要 LabVIEW 是一个开放式的虚拟仪器开发系统应用软件，是一个使用图形符号来编 写程序的编程环境，在该环境中用户可以利用现有的计算机配上相应的硬件，形成既 有普通仪器的基本功能，又有一般仪器所没有的特殊功能的高档低价的虚拟仪器。其 程序设计实质就是设计一个个的“虚拟仪器” ，即“VIs” 。在计算机显示屏幕上利用功 能库和开发工具库产生一个前面板；在后台则利用图形化编程语言编制用于控制前面 板的程序。程序的前面板具有与传统仪器类似的界面，可接受用户的鼠标指令。每一 个 VI 都可以作其它 VI 的调用对象，其功能类似于文本语言的子程序。
2、用 LabVIEW 设 计的虚拟仪器可以脱离 LabVIEW 开发环境，最终用户看见的是和实际的硬件仪器相似 的操作面板。与 C 和 BASIC 一样，LabVIEW 也是通用的编程系统，有一个完成任何 编程任务的庞大函数库。LabVIEW 的函数库包括数据采集、GPIB、串口控制、数据分 析、数据显示及数据存储，等等。LabVIEW 也有传统的程序调试工具，如设置断点、 以动画方式显示数据及其子程序（子 VI）的结果、单步执行等等，便于程序的调试。 PDA 是最近几年随着嵌入式系统发展起来的掌上电脑系统，它和计算机有着相似 的结构：拥有处理器、存储器、显示屏、各种 I/ O 接口等，同时它还
3、有轻便、小巧便 于携带的优点。将虚拟仪器技术应用到 PDA 上，是虚拟仪器技术发展的一个新方向。 文中探讨和基于 PDA 的虚拟仪器技术相关的数据采集，信号处理与分析等，并介绍了 一套开发系统以及应用。 将虚拟仪器技术应用于 PDA(个人数字助理) 中，可以利用 PDA 的优点，不受时 间和空间的限制完成各种测试测量任务。本文主要介绍利用虚拟仪器仿真 PDA 以及利 用 PDA 模块将 LabVIEW 程序下载至 PDA 中，并在 PDA 中运行。 关键词 ：LabVIEW， PDA 模块，智能手机，PDA 的操作系统 II The PDA Software Design Based on L
4、abVIEW ABSTRACT LabVIEW is the virtual instrument development of an open type system application the software is an usage sketch sign to write the plait distance of procedure environment, can make use of in the environments convenient door the existing calculator goes together with homologous hardwa
5、re and forms the basic function of current common instrument, and then have the virtual instrument of the upscale low price of special function that the general instrument has no. Its program design is substantial to is virtual instrument that designs a namely VIs .Show a screen in the calculator up
6、 make use of function database and development tool database to produce a front panel; Then make use of sketch to turn a plait distance in the backstage, the language draws up to used for the procedure that controls front panel. The front panel of procedure has the interface to is similar to with tr
7、aditional instrument, can accept the customers mouse instruction. Each VI can make adjusting of other VIses to use object, its function is more similar than the text originally phonetic sub- procedure. The virtual instrument designed with LabVIEW can escape from LabVIEW development environment, what
8、 end user sees is a similar to the actual hardware instrument operation front-panel. C and BASIC LabVIEW, also general programming system, there is a huge task to complete any programming function. LabVIEW function library include data acquisition and control, data, serial GPIB analysis, data displa
9、y and data storage, etc. The program also have traditional LabVIEW debugging tools, such as set breakpoints, animation way display data and subroutine (the subvi) results and single-step etc, facilitate program debugging. PDA with embedded systems in recent years developed a handheld computer system
10、, which has a similar structure and the computer: a processor, memory, display, various I / O interface, while it also lightweight, compact and easy to bring advantages. Application of virtual instrumentation to the PDA, the development of virtual instrumentation is a new direction. Discussion paper
11、 PDA-based virtual instrument technology-related data acquisition, signal processing and analysis, and introduced a set of development systems and applications. The virtual instrument technology in PDA (Personal Digital Assistant), you can use the advantages of PDA, without time and space to complet
12、e a variety of test and measurement tasks. This paper describes simulation of virtual instrument and the use of PDA LabVIEW PDA module will download to the PDA, and in the PDA to run. III KEY WORDS： LabVIEW, PDA module，Smartphones，PDA Operating Systems IV 目 录 摘 要.I ABSTRACT.II 目 录.IV 1 绪论.1 1.1 课题的提出.1 1.1.1 课题的背景.1 1.1.2 发展状况.1 1.1.3 PDA 的发展趋势.2 1.2 课题的研究内容和技术关键.2 1.2.1 研究内容.2 1.2.2 课题的关键技术.
