【作者】 李剑；

【导师】 杨泽富；

【作者基本信息】 华中科技大学 ， 电工理论与新技术， 2007， 硕士

【摘要】 虚拟仪器是基于计算机的测量仪器,它与传统仪器相比有很多优点,近年来发展迅速。为了满足实验教学发展、创新的需要,实现实验教学智能化、网络化和便携化,考虑研制一种基于DSP的便携式电工教学虚拟仪器系统。本系统完成对电工实验中的常见电气参数如:交流电压、电流;直流电压、电流;电阻、电容、电感的测量,并包含了数字示波器和函数信号发生器功能模块。本系统硬件由信号调理电路、DSP系统、USB接口和人机交互系统组成。本文重点阐述了系统的硬件设计,也给出了在系统实施中需要的测量原理及其算法。虚拟仪器应用程序使用针对DSP的C语言编写。本虚拟仪器用虚拟面板作为人机交互界面,实现了信号的测量计算,波形显示,数据存储等功能。本系统着重模块化的程序开发设计思路,包含了数据采集、量程转换和控制、数字滤波、参数测量子程序模块。文章最后提出了本系统有待进一步研究的主要问题。更多还原

【Abstract】 The virtual instrument is a metrical instrument based on the computer. It has a lot of advantedge compared with the traditional instrument. The development on this kind of instrument is fast these years. We were considering a new kind of virtual instrument system with DSP, for the sake of the innovation, intelligentize, and conveniency. This system has finished shese electric parameters in the electric experiments sunch as: AC voltage, AC current, direct voltage, direct current, resistance, capacitance, inductance etc. this system also contains the modules like digital oscillograph, and the signal generator.The hardware of this system contains signal circuits, the system of the DSP, usb interface and the human-machine interface systems. The emphases of the chapter were the design of the hardware. We point out the measure principle and the arithmetic in this system in the meantime.The application of the virtual instrument was wroten in c languages. We use the virtual faceplate as the human-machine interface. This part has implemented the calculation of the signal, the display of the wave and the memory of the data. We emphasized on the method of the the procedure exploitation , including the data collection, the conversion of the measurement, the digital filter, and the module of the parameters measurement.In the last of this chapter, we indicated the main problems of this system.更多还原