毕业设计（论文）-基于LabVIEW和PCI-6221板卡的多路数据采集系统设计精选.doc

题 目：基于LabVIEW和PCI-6221板卡的多路数据采集系统设计 基于LabVIEW和PCI-6221板卡的多路数据采集系统设计 摘 要 在生产过程中，应用数据采集系统可对生产现场的工艺参数进采集、监视和记录，为提高产品质量、降低成本提供信息和手段。在科学研究中，应用数据采集系统可获得大量的动态信息，是研究瞬间物理过程的有力工具，也是获取科学奥秘的重要手段之一。总之，不论在哪个应用领域中，数据采集与处理越及时工作效率就越高，取得的经济效益就越大。 文章主要内容就是在综合了虚拟仪器技术的特点之上提出了一种基于LabVIEW和PCI-6221板卡的多路数据采集系统的实现方法，首先介绍了虚拟仪器的总线及其标准、框架结构、数据采集的相关理论，然后给出了数据采集系统的硬件结构图。在分析本系统功能需求的基础上，介绍了程序模块化设计、数据库、Web、多线程等技术，最后重点介绍了应用LabVIEW 8.5开发平台实现数据采集系统的方法，给出了设计的前面板及程序框图。 该系统具有多路数据采集、实时显示、历史数据回放与报警记录等功能，并且利用labSQL数据库访问技术，实现了采集数据的存储。此外，还使用Web技术实现了对系统的远程访问及控制。 关键词：虚拟仪器；数据采集；PCI-6221 板卡；曲线显示；labSQL数据库 The Design Of Multi-channel Data Acquisition System On Based Of LabVIEW And PCI-6221 Acquisition Board Abstract In the production process, the application of data acquisition system at the scene of the production process parameters into the collection, monitoring and recording, in order to improve product quality, reduce costs and means of providing information. In scientific research, applied data acquisition system will be a lot of dynamic information, is to examine the physical processes of the moment a powerful tool, but also access to scientific mysteries of one of the important means. In short, regardless of which applications, data acquisition and processing more efficient and timely work of the higher, the greater the economic benefits yielded. The main context of the design is a combination of the characteristics of virtual instrument technology on top of a LabVIEW-based and PCI-6221 data acquisition board system approach, first introduced its virtual instrument bus standard, the framework structure , data collected related to the theory, and then given a data acquisition system hardware structure. In analyzing the functional requirements of the system on the basis of the procedures introduced modular design, database, multi-threading technology, and finally focuses on the LabVIEW 8.5 application development platform for the realization of the method of data acquisition system, given the design of