发布时间：2015-01-23 来源：人大经济论坛

自动化专业论文范文 目 录 摘要………………………………………………………………………………………Ⅰ Abstract…………………………………………………………………………………II 第一章 绪论……………………………………………………………………………1 1.1 电网电气参数测量简介………………………………………………………4 1.1.1 参数测量的方法…………………………………………………………4 1.1.2 参数测量发展前景………………………………………………………5 1.2电网主要电气参数测量方案的确定……………………………………………9 第二章 虚拟仪器技术…………………………………………………………………9 2.1 虚拟仪器技术的概念……………………………………………………………9 2.2 虚拟仪器的发展…………………………………………………………………10 2.2.1 虚拟仪器的发展史………………………………………………………10 2.2.2 虚拟仪器的现状…………………………………………………………12 2.3 虚拟仪器的软硬件构成………………………………………………………15 2.3.1 虚拟仪器的硬件构成……………………………………………………15 2.3.2 虚拟仪器的软件构成……………………………………………………18 2.4 虚拟仪器技术的核心及特点…………………………………………………20 第三章 电网主要电气参数的测量算法及试验方法研究……………………20 3.1 电压、电流的测量……………………………………………………………20 3.1.1 有效值的测量……………………………………………………………20 3.1.2 峰值的测量……………………………………………………………… 22 3.2 相位差的测量………………………………………………………………22 3.3 功率的测量……………………………………………………………………24 3.3.1 有功功率的测量…………………………………………………………24 3.3.2 无功功率的测量…………………………………………………………24 第四章 软件设计……………………………………………………………………27 4.1 概述……………………………………………………………………………27 4.2 主面版的设计…………………………………………………………………27 4.3 电压、电流的测定……………………………………………………………28 4.3.1 算法的确定………………………………………………………………28 4.3.2 前面板的设计……………………………………………………………29 4.3.3 后面板的设计……………………………………………………………30 4.4 相位差的测定…………………………………………………………………31 4.4.1 算法的确定与程序框图…………………………………………………31 4.4.2 前面板的设计……………………………………………………………34 4.4.3 后面板的设计……………………………………………………………35 4.5 功率的测定……………………………………………………………………36 4.5.1 算法及其程序框图……………………………………………………36 4.5.2 前面板的设计…………………………………………………………37 4.5.3 后面板的设计…………………………………………………………38 第五章 硬件设计……………………………………………………………………39 5.1 传感器的研究…………………………………………………………………39 5.1.1 常见传感器的原理及其发展方向……………………………………39 5.1.2 传感器在本课题中的应用……………………………………………40 5.2 低通滤波器的原理……………………………………………………………41 5.3 数据采集卡的研究……………………………………………………………42 5.3.1 数据采集方法…………………………………………………………42 5.3.2 pci2006数据采集卡……………………………………………………42 结论………………………………………………………………………………………46 参考文献…………………………………………………………………………………47 致谢………………………………………………………………………………………48 摘 要：本系统主要是利用NI公司的虚拟仪器软件Labview来实现参数测量的，是虚拟仪器测试技术的一种。此系统具有测量精度高、便携、升级简单、适应面广等优点。 电网电气参数测试系统是由软件模块和硬件模块组成。软件模块包括电压、电流模块、相位差模块、功率模块组成。这一部分的设计主要是利用NI公司的Labview软件完成设计，在其中完成系统的计算、处理和显示等过程。其中电压、电流模块含有其有效值和峰值的测量，功率模块包含有功功率和无功功率的测量。 硬件模块由传感器、信号调理电路、PCI数据采集卡组成。电网信号由传感器接过来，经信号调理电路把信号调理到PCI卡所要求的值，最后经由PCI卡完成数据采集、A/ D转换或D/A转换，转换成数字量输入电脑经软件处理后便可得到所测参数的值。 关键词：虚拟仪器；Labview；电网电气参数；信号调理 Abstract: This system is mainly the virtual instrument software Labview that makes use of the company of NI to carry out the parameter diagraph of, is a kind of the virtual instrument test technique. This system has the accuracy of diagraph high, hold, upgrade then simple, adapt to face wide etc. advantage. The charged barbed wire net electricity parameter test system is to be constitute by the software mold piece and hardware mold piece. The software mold piece includes the electric voltage, electric current mold piece, phase shift mold piece, the power mold piece to constitute. The design of this part mainly is a software of Lab view that makes use of the company of NI to complete the design, completing the processes such as calculation, processing and manifestation etc. of the system therein. Among them the electric voltage, the electric current mold piece diagraph that implies its valid value and max and min value, the power mold piece include has a great achievement the power and has no power of diagraph. The hardware mold piece from spread the feeling machine, signal to adjust to manage the electric circuit, data of PCI to collect the card to constitute. The charged barbed wire net signal from spread the feeling machine to connect to come over, was adjust by signal to manage the electric circuit the value that the signal adjusts to manage the PCI card to request, the end completes the data to collect through the PCI card, the A/ D convert or the D/ A convert, convert to become the numerical quantity importation computer and can get then through the software processing the value of measure the parameter. Keyword: Virtual instrument; Labview; Charged barbed wire net electricity parameter; The signal adjusts the reason